With Application Of Holding Or Bias Voltage (i.e., Voltage Which Does Not Change The Optical State Of The Liquid Crystal) Patents (Class 349/34)
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Patent number: 10948148Abstract: The present invention relates to a lighting device, in particular a headlamp for vehicles, at least comprising an array of light sources, consisting of first and second light sources being mounted within the same flat or curved plane, and a projecting optical system arranged to project light emitted by the light sources in a forward direction of the lighting device. At least one shifting element is arranged in front of said first light sources. The shifting element generates real or virtual emission positions of the light of said first light sources shifted towards or away from the projecting optical system with respect to emission positions of said second light sources. With the proposed lighting device, in addition to the main lighting function of illumination, a pattern or signature can be projected at one or several additional image planes. The lighting device thus e.g. allows the additional projection of branding or safety patterns.Type: GrantFiled: May 11, 2016Date of Patent: March 16, 2021Assignee: Lumileds LLCInventors: Hugo Johan Cornelissen, Achim Hilgers, Floris Maria Hermansz Crompvoets, Norbertus Antonius Maria Sweegers, Marc Andre De Samber
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Patent number: 10755612Abstract: A vehicle mountable holographic promoting system and method of use; the vehicle mountable holographic promoting system includes a body with at least one light, a mount, and a controller in communication with a software application and the body. The body is mountable to the vehicle via the mount. The mount is able to be removably attachable or otherwise secured to roof of a vehicle. The controller controls the body such that the body is able to visually promote via an image display at least one promotable item using the at least one light. The promotable item appearing to float on a plane above the vehicle.Type: GrantFiled: June 7, 2019Date of Patent: August 25, 2020Inventor: Tarkan Bastiyali
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Patent number: 10039170Abstract: According to an aspect of the present inventive concept, this and other objects are achieved by a lighting system (100) for illuminating an article (112) comprising: a lighting device (102) arranged to emit light (103) towards the article (112), wherein a spectrum of the emitted light (103) is controllable. The lighting system (100) further comprises a controller (104) configured to control the lighting device (102) responsive to detection of presence or movement of an object (110) within a detection zone (108) associated with the article (112). The controller (104) is configured to: control the lighting device (102) to emit light (103) having a first spectrum in response to absence of an object (110) or movement of an object (110) within the detection zone (108), and control the lighting device (102) to emit light having a second spectrum in response to presence of an object (110) or movement of an object (110) within the detection zone (108).Type: GrantFiled: March 17, 2015Date of Patent: July 31, 2018Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Johannes Petrus Wilhelmus Baaijens, Simone Helena Maria Poort, Daniel Willem Elisabeth Schobben, Anna Louise Bouwkamp-Wijnoltz
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Patent number: 9875706Abstract: The present invention provides a GOA circuit of reducing feed-through voltage. An eleventh thin film transistor (T11) and a first capacitor (R1) coupled to the eleventh thin film transistor (T11) in series are added in a pull-down output unit (400). In the output process of the GOA circuit, the eleventh thin film transistor (T11) is activated with the added output control signal (CKF). With the voltage division function of the first resistor (R1), one more falling edge is generated to the waveform outputted by the output end (G(n)). Namely, the waveform outputted by the output end (G(n)) comprises two falling edges. Thereby, the voltage difference before and after the gate of the TFT in the pixel can be decreased to reduce the feed-through voltage and raise the display uniformity of the liquid crystal panel.Type: GrantFiled: December 28, 2015Date of Patent: January 23, 2018Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventor: Qiang Gong
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Patent number: 9514692Abstract: A display device and a switching method of its display modes are provided. The display device comprises: a display panel (1), configured to display an image; a slit grating (2), on a light exiting side of the display panel (1); and a liquid crystal lens (3), on a light exiting side of the slit grating (2) to realize three effects of a concave lens effect, a convex lens effect and a flat light-transmitting glass effect.Type: GrantFiled: December 20, 2013Date of Patent: December 6, 2016Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventor: Yanbing Wu
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Patent number: 9229493Abstract: A display device is provided which includes a display panel having pixels, each pixel having a pixel electrode, a common electrode, an image line to supply an image signal to the plurality of pixels, and a transparent conductive film disposed at a surface on a viewer side. The display device display panel, also includes a voltage generation unit to supply a voltage having an AC component superposed on a DC component to the transparent conductive film. The AC component is a voltage with reverse polarity with respect to a spike-shaped voltage occurring at the transparent conductive film to thereby cancel out effects of the spike-shaped voltage on the transparent conductive film.Type: GrantFiled: May 1, 2012Date of Patent: January 5, 2016Assignee: JAPAN DISPLAY INC.Inventors: Yasuyuki Mishima, Keiichiro Takahashi
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Patent number: 8860698Abstract: This invention provides an electro-optical module with reduced noise in driving voltage. The invention can include a power supply substrate that is arranged separately from the flexible substrate having a driver, so that the noise of the driving voltage supplied from the power supply substrate is reduced.Type: GrantFiled: October 24, 2008Date of Patent: October 14, 2014Assignee: Seiko Epson CorporationInventor: Tadashi Yamada
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Publication number: 20140293180Abstract: A liquid crystal display includes a substrate and a liquid crystal layer. The liquid crystal display further includes a first electrode disposed between the liquid crystal layer and the substrate. The liquid crystal display further includes a second electrode disposed between the liquid crystal layer and the substrate and configured to cooperate with the first substrate for generating an electric field to control molecules in the liquid crystal layer. The liquid crystal display further includes a reference voltage line configured to provide a reference voltage to the first electrode. The liquid crystal display further includes a reference voltage supplier configured to provide the reference voltage to the reference voltage line. The liquid crystal display further includes a reference voltage discharger electrically connected to the reference voltage line.Type: ApplicationFiled: March 11, 2014Publication date: October 2, 2014Applicant: Samsung Display Co., Ltd.Inventors: Hyun Seok HONG, Hyo-Chul LEE, Yeon-Sun NA, Utah CHOI
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Patent number: 8830409Abstract: A liquid crystal display device includes a first substrate, a second substrate and liquid crystal. The first substrate includes pixel electrodes, a peripheral circuit and a dummy wiring. The peripheral circuit and the dummy wiring are provided outside a pixel area in which the pixel electrodes are arranged. The second substrate is opposed to the first substrate through the liquid crystal. The second substrate includes a translucent conductive film that is provided on an opposite side of the second substrate to a side where the liquid crystal is present. The dummy wiring is located on an outer peripheral side of the substrates than the peripheral circuit and is provided independently of the peripheral circuit in terms of circuit. The dummy wiring is grounded outside the first substrate.Type: GrantFiled: December 26, 2007Date of Patent: September 9, 2014Assignee: Japan Display West Inc.Inventors: Yasuo Segawa, Masaaki Aota, Tomohide Onogi, Hiroshi Matsuda
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Patent number: 8830435Abstract: A liquid crystal display device includes a first substrate and a second substrate. The first substrate includes a gate line and an auxiliary capacitance line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, and a pixel electrode having a main pixel electrode arranged on the auxiliary capacitance line and extending in the first direction. The second substrate includes a common electrode having a main common electrode arranged above the gate line and extending in the first direction. A liquid crystal layer is held between the first substrate and the second substrate having liquid crystal molecules. The liquid crystal molecules are initially aligned in the first direction in a splay alignment state between the first substrate and the second substrate in a state where electric field is not formed between the pixel electrode and the common electrode.Type: GrantFiled: February 21, 2014Date of Patent: September 9, 2014Assignee: Japan Display Inc.Inventor: Jin Hirosawa
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Publication number: 20140204297Abstract: The present invention discloses a light tunable device includes two substrates, a light tunable layer sealed between the two substrates, two electrodes formed on the two substrates, a tuning device coupled to the two electrodes to control bias for the two electrodes to control the status of the light tunable layer to have at least three statues.Type: ApplicationFiled: January 17, 2014Publication date: July 24, 2014Inventor: Kuo-Ching Chiang
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Patent number: 8767135Abstract: The invention relates to a lighting apparatus (1) for generating a light pattern. A light source (4) generates a light beam (5) for being directed onto a liquid crystal cell (2). The liquid crystal cell (2) comprises a periodic structure (3). If voltage is applied to the liquid crystal cell (2) by a voltage source (8), a period phase pattern is generated. The liquid crystal cell (2) and the light source (4) are adapted such that multiple separate light beams (6) are generated in different directions by diffraction at the generated periodic phase pattern, wherein the multiple separate light beams (6) form the light pattern (7). Since the light pattern is generated by diffraction at the periodic phase pattern, which is modifiable by applying voltage, different light patterns can be generated, in particular, for decorative purposes, in a technically relatively simple way.Type: GrantFiled: September 9, 2010Date of Patent: July 1, 2014Assignee: Koninklijke Philips N.V.Inventors: Rifat Ata Mustafa Hikmet, Ties Van Bommel, Yongfeng Ni
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Patent number: 8736782Abstract: A notebook computer includes a host and a display device. The display device includes a casing and a liquid crystal display module. The casing is pivoted to the host. The liquid crystal display module includes a back cover, a light guide plate, a liquid crystal panel, a light source, and an antenna. The back cover is disposed in the casing. The light guide plate is disposed on and supported by the back cover. The liquid crystal panel is disposed on and supported by the back cover, and the light guide plate is located between the back cover and the liquid crystal panel. The light source is disposed on a side surface of the light guide plate. The antenna is integrally connected to the back cover.Type: GrantFiled: March 9, 2012Date of Patent: May 27, 2014Assignee: Young Lighting Technology Inc.Inventors: Chin-Lung Chen, Jeng-Bin Hsu
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Publication number: 20140125898Abstract: There is provided a color regulating device for illumination. The color regulating device includes a light-valving structure for adjusting a flux ratio of outgoing light through the light-valving structure to incident light entering the light-valving structure, and a color-adjusting structure having a wavelength-band converting element for changing incident light with a wavelength band into outgoing light with a different wavelength band through the element. Wherein, the light-valving structure and the color-adjusting structure at least partially overlap on the traveling path of light, forming at least one overlapping structure. Mixing the outgoing lights of the light source passing through light-valving structure, the color-adjusting structure, and the overlapping structure to obtain a different wavelength band (or color temperature) from that of the light source. There are also provided a color adjusting apparatus for illumination including the color adjusting device and a color adjusting method.Type: ApplicationFiled: January 12, 2014Publication date: May 8, 2014Applicant: Planck Co., Ltd.Inventors: Chih-Yu CHAO, Chiu-Chang HUANG, Chieh-Hsiung KUAN, Vin-Cent SU
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Patent number: 8692947Abstract: A liquid crystal display device includes a first substrate and a second substrate. The first substrate includes a gate line and an auxiliary capacitance line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, and a pixel electrode having a main pixel electrode arranged on the auxiliary capacitance line and extending in the first direction. The second substrate includes a common electrode having a main common electrode arranged above the gate line and extending in the first direction. A liquid crystal layer is held between the first substrate and the second substrate having liquid crystal molecules. The liquid crystal molecules are initially aligned in the first direction in a splay alignment state between the first substrate and the second substrate in a state where electric field is not formed between the pixel electrode and the common electrode.Type: GrantFiled: July 13, 2012Date of Patent: April 8, 2014Assignee: Japan Display Inc.Inventor: Jin Hirosawa
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Patent number: 8665385Abstract: A non-volatile electronic display includes a light valve plate comprising a plurality of liquid crystal cells on a transparent substrate; a plurality of “floating/storage” nodes functioning like non-volatile memories formed on the transparent substrate and corresponding to the liquid crystal cells, and a plurality of word lines and a plurality of bit lines connected to the plurality of non-volatile memories and supplying signal to store charge to at least one non-volatile memory. The charge is retained in the at least one “floating/storage” nodes functioning like non-volatile memory for a predetermined period when no external power is applied to the non-volatile electronic display.Type: GrantFiled: October 14, 2011Date of Patent: March 4, 2014Inventor: Shu-Lu Chen
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Publication number: 20140049712Abstract: An LCD and a bidirectional shift register device thereof are provided. The bidirectional shift register device of the invention is disposed on the substrate of the panel and includes multi-stages shift registers in series connection. Each stage shift register includes a pre-charging unit, a pull-up unit and a pull-down unit, in which the pre-charging unit receives a first preset clock signal and the output from a (i?1)th stage shift register or a (i+1)th stage shift register so as to thereby output a charging signal. The pull-up unit receives the charging signal and a second preset clock signal so as to thereby output a scan signal. The pull-down unit receives the second preset clock signal, a third preset clock signal and the output from the (i+2)th stage shift register or the (i?2)th stage shift register so as to decide whether or not pulling down the scan signal to a reference level.Type: ApplicationFiled: July 5, 2013Publication date: February 20, 2014Inventors: Chia-Hua Yu, Chien-Ting Chan, Chien-Chuan Ko, Chun-Lin Chang
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Publication number: 20140016052Abstract: A liquid crystal panel, a driving method thereof, and a liquid crystal display device containing the same are disclosed. The liquid crystal panel of the present invention comprises: a first substrate having a first electrode layer; a second substrate having a second electrode layer opposite to the first electrode layer; a blue-phase liquid crystal layer disposed between the first substrate and the second substrate; and a light-shielding region disposed on the second substrate. When a bias voltage is applied to the first electrode layer and the second electrode layer, a refractive gradient is formed in the blue-phase liquid crystal layer, and thereby an incident light passing through the blue-phase liquid crystal layer focuses on the light-shielding region.Type: ApplicationFiled: July 3, 2013Publication date: January 16, 2014Inventors: Kei-Hsiung YANG, Ruey-Jer WENG
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Patent number: 8624259Abstract: An organic light-emitting display device includes a substrate; a thin-film transistor on the substrate; a first insulating layer covering the thin-film transistor; a first electrode on the first insulating layer, and electrically connected to the thin-film transistor; a second insulating layer on the first insulating layer so as to cover the first electrode, and having an opening for exposing a part of the first electrode; a porous member in the second insulating layer; a second electrode on the second insulating layer, and facing the first electrode so as to correspond to the opening; and an organic emission layer between the first electrode and the second electrode so as to correspond to the opening. The organic light-emitting display device may prevent degradation of characteristics of an organic light-emitting device due to discharge of gas from an organic material.Type: GrantFiled: September 23, 2011Date of Patent: January 7, 2014Assignee: Samsung Display Co., Ltd.Inventors: Yeon-Hwa Lee, Won-Jong Kim, Ji-Young Choung, Joon-Gu Lee, Darby Choi, Young-Woo Song, Jong-Hyuk Lee
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Patent number: 8620131Abstract: A variable optical attenuator includes a collimating unit that collimates an incident light beam, a polarization splitting member that separates the collimated light beam into a first polarized light beam having a first polarization and a second polarized light beam having a second polarization, a birefringence control unit through which the first and second polarized light beams pass, the birefringence control unit including a liquid crystal cell having a birefringence is controlled by a voltage or current, wherein the birefringence of the liquid crystal cell is substantially zero when no voltage or current is applied thereto, and a reflection member that reflects the first and second polarized light beams output from the birefringence control unit. The variable optical attenuator has high stability, high precision, and low volume.Type: GrantFiled: September 30, 2011Date of Patent: December 31, 2013Assignee: INLC Technology, Inc.Inventor: Seong Woo Suh
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Patent number: 8586453Abstract: A method for fabricating a thin film pattern and a method for fabricating an array substrate are provided. The method for fabricating a thin film pattern comprises: forming a first film and a second film sequentially; applying a layer of photoresist on the second film; forming a photoresist pattern comprising a totally left region, a partially left region and a totally removed region; performing a first wet etching on the second film in the totally removed region; performing a first dry etching on the first film in the totally removed region to form a first pattern, and etching the photoresist layer to remove the photoresist in the partially left region to expose the second film in the partially left region; performing a second wet etching on the second film in the partially left region; performing a second dry etching to form a second pattern; and removing the residual photoresist.Type: GrantFiled: September 29, 2011Date of Patent: November 19, 2013Assignee: Boe Technology Group Co., Ltd.Inventors: Seongyeol Yoo, Youngsuk Song, Seungjin Choi, Zhanfeng Cao
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Patent number: 8482686Abstract: Display ground plane structures may contain slits. Image pixel electrodes in the display may be arranged in rows and columns. Image pixels in the display may be controlled using gate lines that are associated with the rows and data lines that are associated with the columns. An electric field may be produced by each image pixel electrode that extends through a liquid crystal layer to an associated portion of the ground plane. The slits in the ground plane may have a slit width. Data lines may be located sufficiently below the ground plane and sufficiently out of alignment with the slits to minimize crosstalk from parasitic electric fields. A three-column inversion scheme may be used when driving data line signals into the display, so that pairs of pixels that straddle the slits are each driven with a common polarity. Gate line scanning patterns may be used that enhance display uniformity.Type: GrantFiled: February 7, 2013Date of Patent: July 9, 2013Assignee: Apple Inc.Inventors: Cheng Ho Yu, Ming Xu, Young Bae Park, Zhibing Ge, Daisuke Nozu, Cheng Chen, Abbas Jamshidi Roudbari, Shih Chang Chang, Shawn R. Gettemy
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Patent number: 8471842Abstract: A liquid crystal display (LCD) device having a first substrate and a second substrate with liquid crystal sealed therebetween, includes a plurality of gate lines and data lines crossing each other on the first substrate; a gate driving section for driving the gate lines; a source driving section for precharging the data lines for a first time and supplying video signals to the data lines; and a precharge circuit section for precharging the data lines for a second time.Type: GrantFiled: August 4, 2004Date of Patent: June 25, 2013Assignee: LG Display Co., Ltd.Inventor: Yong Min Ha
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Publication number: 20130120678Abstract: There is provided a color regulating device for illumination. The color regulating device includes a light-valving structure for adjusting a flux ratio of outgoing light through the light-valving structure to incident light entering the light-valving structure, and a color-adjusting structure having a wavelength-band converting element for changing incident light with a wavelength band into outgoing light with a different wavelength band through the element. Wherein, the light-valving structure and the color-adjusting structure at least partially overlap on the traveling path of light, forming at least one overlapping structure. Mixing the outgoing lights of the light source passing through light-valving structure, the color-adjusting structure, and the overlapping structure to obtain a different wavelength band (or color temperature) from that of the light source. There are also provided a color adjusting apparatus for illumination including the color adjusting device and a color adjusting method.Type: ApplicationFiled: November 5, 2012Publication date: May 16, 2013Applicant: Planck Co., Ltd.Inventor: Planck Co., Ltd.
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Patent number: 8421945Abstract: A liquid crystal display device includes a liquid crystal display panel having a plurality of pixels; a detector included in an interior of the liquid crystal display panel for detecting a variance of a kickback voltage; and a compensation common voltage generator reflects the variance of the kickback voltage detected by the detector and controls a common voltage to be supplied to the liquid crystal display panel. The detector includes at least one or more detection pixels, and the detection pixels are electrically connected to a gate line arranged in the liquid crystal display panel and to a detection line which is arranged neighboring to the data line disposed close to the edge of the liquid crystal display panel.Type: GrantFiled: November 19, 2010Date of Patent: April 16, 2013Assignee: Samsung Display Co., Ltd.Inventor: Kwang-Sae Lee
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Patent number: 8411006Abstract: In a display device having a plurality of scan signal line driving circuits, its display quality is improved. The display device comprises a plurality of scan signal lines, a plurality of image signal lines, and a plurality of scan signal line driving circuits for generating scan signals for driving the scan signal lines. Each of the scan signal line driving circuit internally generates a driving signal having the waveform of such potential variation that the potential decreases with a slope from a high potential to an intermediate potential between the high potential and a low potential. Each of the scan signal line driving circuits further includes a signal wiring for connecting the scan signal line driving circuits to one another and applying the driving signal.Type: GrantFiled: September 5, 2006Date of Patent: April 2, 2013Assignee: Sharp Kabushiki KaishaInventors: Toshihiro Yanagi, Kazuhiro Tani
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Patent number: 8368626Abstract: A liquid crystal display device with multiple pixels includes a first sub-pixel including, a first liquid crystal capacitance between a common electrode and a first pixel electrode, and a first auxiliary capacitance between the first pixel electrode and a first auxiliary capacitance electrode; a second sub-pixel including, a second liquid crystal capacitance between the common electrode and a second pixel electrode, a second auxiliary capacitance between the second pixel electrode and a second auxiliary capacitance electrode, and a step-down capacitance between the second pixel electrode and a step-down capacitance electrode; a first voltage application unit for applying a common first voltage to the common electrode, the first auxiliary capacitance electrode, and the second auxiliary capacitance electrode; and a second voltage application unit for applying a second voltage, which is different from the first voltage, to the step-down capacitance electrode.Type: GrantFiled: March 19, 2009Date of Patent: February 5, 2013Assignee: Casio Computer Co., Ltd.Inventors: Yayoi Nakamura, Hiromitsu Ishii
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Patent number: 8363174Abstract: The present invention relates to the removal of ion contaminations from liquid crystal layers in liquid crystal display devices. The ions are removed by means of so called ion pumping, which utilizes the anisotropic viscosity of liquid crystals. The ions are pumped up and down in the liquid crystal layer by means of an alternating electric filed. The alternating electric field simultaneously alters the alignment of directors in the liquid crystal. The viscosity in the liquid crystal is related to the director directions, and the ions are thereby moved in non-closed trajectories. The inventive ion pumping can be further improved using an asymmetric or biased alternating electric field.Type: GrantFiled: May 11, 2010Date of Patent: January 29, 2013Assignee: Chimei Innolux CorporationInventors: Alwin Rogier Martijn Verschueren, Kristiaan Neyts, Goran Stojmenovik
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Patent number: 8344996Abstract: A method for updating a submatrix of a display matrix of a display device comprises sequentially selecting rows of the display matrix starting from an initial row of the display matrix. The method includes determining whether a selected row precedes a first row of the submatrix in a first drive frame of a waveform having two or more drive frames. If a condition that a selected row precedes the first row of the submatrix in the first drive frame of the waveform is false, the method includes addressing the selected row for a first line address period. If a condition that a selected row precedes the first row of the submatrix in the first drive frame of the waveform is true, the method includes addressing the selected row for a second line address period.Type: GrantFiled: July 27, 2009Date of Patent: January 1, 2013Assignee: Seiko Epson CorporationInventors: Jimmy Kwok Lap Lai, Eric Jeffrey
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Patent number: 8330693Abstract: A two-stage drive waveform switches a DFLC from a high tilt state to a low tilt state quickly and without scattering. A relaxation voltage is applied to delay the onset of the high amplitude high frequency kick voltage when switching from a high tilt state to a low tilt state. The relaxation voltage allows the molecules to ‘relax’ in accordance with their own elasticity towards their low tilt state in the direction of the average azimuth angle of the low tilt state. The kick voltage is then applied to drive the molecules quickly to the low tilt state. Optimal switching time and the desired molecular response is achieved by delaying the onset of the large kick voltage via application of the relaxation voltage. The relaxation voltage may constitute a lower amplitude holding voltage, a small or zero DC voltage or a smooth windowing of the kick voltage.Type: GrantFiled: July 2, 2009Date of Patent: December 11, 2012Assignee: Teledyne Scientific & Imaging, LLCInventors: Bing Wen, Dong-Feng Gu
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Patent number: 8330694Abstract: The liquid crystal display apparatus includes a liquid crystal modulation element including first and second electrode, a liquid crystal layer disposed between the first and second electrodes, a first alignment film disposed between the first electrode and the liquid crystal layer, and a second alignment film disposed between the second electrode and the liquid crystal layer. The apparatus further includes a controller that respectively provides first and second electric potentials to the first and second electrodes such that a sign of an electric field generated in the liquid crystal layer is cyclically inverted in a modulation operation state. The controller respectively provides third and fourth electric potentials to the first and second electrodes such that the sign of the electric field is fixed in a state other than the modulation operation state. The apparatus can avoid an influence by cumulated charged particles without adding a new member.Type: GrantFiled: June 4, 2008Date of Patent: December 11, 2012Assignee: Canon Kabushiki KaishaInventor: Masayuki Abe
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Patent number: 8310607Abstract: A liquid crystal spatial light modulator for adjusting an optical signal is configured in such a manner that a region of one element is partitioned into two regions so as to perform intensity modulation in one region and phase modulation in the other region. Since the region for performing the intensity modulation and the region for performing the phase modulation can be formed by partitioning one region of the liquid crystal spatial light modulator, only one element allows adjusting functions, both the optical signal intensity modulation and phase modulation.Type: GrantFiled: November 12, 2007Date of Patent: November 13, 2012Assignee: Citizen Holdings Co., Ltd.Inventor: Masafumi Ide
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Publication number: 20120249903Abstract: A controlling method of a display apparatus that includes a display device including a plurality of pixels, each of the pixels being formed of a cholesteric liquid crystal material, the controlling method includes: applying the first voltage making the cholesteric liquid crystal material transparent between the first and the second electrodes; applying the second voltage setting reflectance of the cholesteric liquid crystal material in each of the pixels at the time of selection of the each of the pixels between the first and the second electrodes; and applying the third voltage providing no change in reflectance of the cholesteric liquid crystal material between the first and the second electrodes.Type: ApplicationFiled: March 22, 2012Publication date: October 4, 2012Applicant: FUJITSU LIMITEDInventor: Hirokazu ARITAKE
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Publication number: 20120194755Abstract: A method for recovering a latent response time period of a TN liquid crystal cell may include determining a time period which may be related to a back flow effect of the TN liquid crystal cell. Recovering the latent response time period may be correlated to the time at which a voltage may be applied across the TN liquid crystal cell. The method may include applying the voltage to the TN liquid crystal cell during a display region in which both the right and left signals may be displayed or a region in which the content may not be appropriately viewable. By applying the voltage early to the TN liquid crystal cell, a resulting transmission “bump” may not optically contaminate the viewable content.Type: ApplicationFiled: January 26, 2012Publication date: August 2, 2012Applicant: RealD Inc.Inventor: Jianmin Chen
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Publication number: 20120169952Abstract: The invention relates to a lighting apparatus (1) for generating a light pattern. A light source (4) generates a light beam (5) for being directed onto a liquid crystal cell (2). The liquid crystal cell (2) comprises a periodic structure (3). If voltage is applied to the liquid crystal cell (2) by a voltage source (8), a period phase pattern is generated. The liquid crystal cell (2) and the light source (4) are adapted such that multiple separate light beams (6) are generated in different directions by diffraction at the generated periodic phase pattern, wherein the multiple separate light beams (6) form the light pattern (7). Since the light pattern is generated by diffraction at the periodic phase pattern, which is modifiable by applying voltage, different light patterns can be generated, in particular, for decorative purposes, in a technically relatively simple way.Type: ApplicationFiled: September 9, 2010Publication date: July 5, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Rifat Ata Mustafa Hikmet, Ties Van Bommel, Yongfeng Ni
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Publication number: 20120162554Abstract: An operation of floating charged particles and an operation of dispersing charged particles in a liquid crystal layer are controlled by determining strengths of electric fields to be applied to a liquid crystal element in accordance with a length of elapsed time from a point turning on the liquid crystal display device.Type: ApplicationFiled: March 7, 2012Publication date: June 28, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Norihiro Kawahara, Masayuki Abe, Masaru Yamamura, Yuya Kurata
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Publication number: 20120154380Abstract: A stereoscopic image display device is disclosed. According to one aspect, the stereoscopic image display device includes a display panel, a timing controller, a data driver, and a gate driver. The timing controller alternately outputs a left frame image signal and a right frame image signal, and outputs a plurality of first and second control signals. The data driver drives the data lines in response to the left frame image signal, the right frame image signal and the first control signals. The gate driver drives the gate lines and outputs a transfer signal in response to the second control signals. Each of a plurality of pixels includes a first transistor, a hold capacitor, a second transistor, a storage capacitor, and a liquid crystal capacitor. The first transistor is connected between a corresponding data line and a first node, and has a gate connected to a corresponding gate line. The hold capacitor is connected between the first node and a ground voltage.Type: ApplicationFiled: July 22, 2011Publication date: June 21, 2012Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventor: Young-In Hwang
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Patent number: 8144277Abstract: An operation of floating charged particles and an operation of dispersing charged particles in a liquid crystal layer are controlled by determining strengths of electric fields to be applied to a liquid crystal element in accordance with a state of irradiation of light from a light source of a liquid crystal display device.Type: GrantFiled: April 29, 2009Date of Patent: March 27, 2012Assignee: Canon Kabushiki KaishaInventors: Norihiro Kawahara, Masayuki Abe, Masaru Yamamura, Yuya Kurata
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Publication number: 20120062810Abstract: A liquid crystal display device capable of reducing manufacturing costs is disclosed. The liquid crystal display device includes first and second substrates facing each other, a liquid crystal layer filled between the first and second substrates, a first common electrode formed in a first pixel region on the first substrate in correspondence with a first subpixel for emitting a light of a first color, and having a first area, wherein a common voltage is applied to the first common electrode, and a second common electrode formed in a second pixel region on the first substrate in correspondence with a second subpixel for emitting light of a second color different from the first color and having a second area different from the first area, wherein the common voltage is applied to the second common electrode.Type: ApplicationFiled: December 28, 2010Publication date: March 15, 2012Inventors: Mi Kyung Lee, Hyun Suk Jin
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Patent number: 8130332Abstract: A liquid crystal spatial light modulator for adjusting an optical signal is configured in such a manner that a region of one element is partitioned into two regions so as to perform intensity modulation in one region and phase modulation in the other region. Since the region for performing the intensity modulation and the region for performing the phase modulation can be formed by partitioning one region of the liquid crystal spatial light modulator, only one element allows adjusting functions, both the optical signal intensity modulation and phase modulation.Type: GrantFiled: November 12, 2007Date of Patent: March 6, 2012Assignee: Citizen Holdings Co., Ltd.Inventor: Masafumi Ide
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Patent number: 8125424Abstract: A liquid crystal display device and a driving method thereof, which are capable of preventing generation of a residual image upon power-off, are disclosed. The liquid crystal display device includes a power supply unit for outputting a plurality of drive voltages after delaying the drive voltages, a voltage detector for monitoring one of the drive voltages, and outputting a power-off detect signal based on the result of the monitoring, a timing controller for increasing a frequency of a control signal in response to the power-off detect signal, and outputting the frequency-increased control signal, a gate driver for outputting a scan signal in response to the frequency-increased control signal, a data driver for outputting a constant voltage in response to another control signal from the timing controller, and a liquid crystal panel for applying the constant voltage to all sub-pixels of the liquid crystal panel in response to the scan signal.Type: GrantFiled: June 29, 2007Date of Patent: February 28, 2012Assignee: LG Display Co., Ltd.Inventors: Jin Cheol Hong, Soon Dong Cho, Boo Han Kim, Min Gi Kim
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Patent number: 7973784Abstract: A drive circuit of an electro-optical device includes: plural rows of scanning lines; plural columns of data lines; a plurality of common electrodes; pixel switching elements, pixel capacitors; and pixels. Here, the drive circuit includes a scanning line drive circuit; and first transistors corresponding to the plurality of common electrodes. Each of the first transistors includes: a common electrode drive circuit for connecting the common electrode to a power supply line, to which a predetermined voltage is applied, when the scanning line is selected, a common signal output circuit having a voltage for allowing a detection voltage of the common electrode corresponding to a scanning line to become a reference voltage when the scanning line is selected, and a data line drive circuit having a voltage according to the gray scale level of the pixel to the pixel corresponding to the selected scanning line via the data line.Type: GrantFiled: August 6, 2007Date of Patent: July 5, 2011Assignee: Sony CorporationInventor: Katsunori Yamazaki
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Publication number: 20110134349Abstract: A multi-stable liquid crystal display device is provided. The device includes a first substrate, a second substrate, a first electrode, a second electrode and a liquid crystal layer. The first substrate and the second substrate are disposed opposite to each other. The first electrode is disposed on the first substrate. The second electrode is disposed on the side of the second substrate facing the first substrate. At least one of the first electrode and the second electrode includes a grating electrode. The liquid crystal layer includes smectic liquid crystal molecules. Moreover, a method of driving the multi-stable liquid crystal display device is further provided in the present invention.Type: ApplicationFiled: April 11, 2010Publication date: June 9, 2011Inventors: Jhih-Sian Wu, Hui-Yu Chen, Szu-Fen Chen
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Publication number: 20110115996Abstract: In a transflective liquid crystal display having a transmission area and the reflection area, the transmissive electrode is connected to a switching element to control the liquid crystal layer in the transmission area, and the reflective electrode is connected to the switching element via a separate capacitor to control the liquid crystal layer in the reflection area. The separate capacitor is used to shift the reflectance in the reflection area toward a higher voltage end in order to avoid the reflectance inversion problem. In addition, an adjustment capacitor is connected between the reflective electrode and a different common line. The adjustment capacitor is used to reduce or eliminate the discrepancy between the gamma curve associated with the transmittance and the gamma curve associated with the reflectance.Type: ApplicationFiled: November 16, 2010Publication date: May 19, 2011Inventors: Ching-Huan Lin, Jenn-Jia Su, Chih-Ming Chang
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Patent number: 7868985Abstract: An in-plane switching liquid crystal display device is designed in such a way that an angle defined by the lengthwise direction of a common electrode and a pixel electrode and a rubbing direction of an alignment layer is set to 10 to 20°, a cell gap d is set to 2.7 ?m or smaller, the dielectric anisotropy ?? of a liquid crystal constituting a liquid crystal layer is set to 8 to 20, a white voltage Vwhite to be applied to the pixel electrode when displaying white is set to 4 to 7 V, and the white voltage Vwhite (V), the dielectric anisotropy ?? of the liquid crystal, the cell gap d (?m) and an interval L (?m) between the common electrode and the pixel electrode satisfy the following expression 11.8 > V white d - 0.6 × L 0.5 × ?? - 0.5 > 9.8 .Type: GrantFiled: February 2, 2009Date of Patent: January 11, 2011Assignee: NEC CorporationInventors: Daisuke Inoue, Shinichi Nishida
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Patent number: 7791680Abstract: A display device which can suppress an afterimage phenomenon from occurring includes a first plate including a pixel electrode which is disposed in a transmitting region and a first impurity adsorption electrode which is disposed in a light-shielding region and is separated from the pixel electrode, a second plate facing the first plate and including a second impurity adsorption electrode which is disposed in the light-shielding region to face the first impurity adsorption electrode, and an intermediate layer interposed between the first plate and the second plate.Type: GrantFiled: December 6, 2006Date of Patent: September 7, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-woo Lee, Hee-seop Kim, Chang-hun Lee, Eun-hee Han
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Patent number: 7714947Abstract: The present invention relates to the removal of ion (42, 44, 902) contaminations from liquid crystal layers (901) in liquid crystal display devices (900). The ions (42, 44, 902) are removed by means of so called ion pumping, which utilizes the anisotropic viscosity of liquid crystals. The ions (42, 44, 902) are pumped up and down in the liquid crystal layer by means of an alternating electric filed. The alternating electric field simultaneously alters the alignment of directors (41) in the liquid crystal. The viscosity in the liquid crystal is related to the director directions, and the ions (42, 44, 902) are thereby moved in non-closed trajectories (43, 45). The inventive ion pumping can be further improved using an asymmetric or biased alternating electric field.Type: GrantFiled: August 17, 2004Date of Patent: May 11, 2010Assignee: Chi Mei Optoelectronics CorporationInventors: Alwin Rogier Martijn Verschueren, Kristiaan Neyts, Goran Stojmenovik
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Publication number: 20100091209Abstract: The invention relates to a vertical electric field type of the liquid crystal display and a driving method. The method comprising: during displaying each picture, driving first pixel and second pixel at adjacent two rows and the same column, comprising: step 101 of applying a format voltage to the first pixel and vertically arranging liquid crystal in the first pixel to form brightness mode; step 102 of applying a driving voltage to the first pixel to display a picture; step 103 of applying a format voltage to the second pixel and vertically arranging a liquid crystal in the second pixel to form brightness mode; step 104 of applying a driving voltage to second pixel to display a picture. The driving method employs a format voltage to form a brightness mode and employs a driving voltage to display a picture, enabling to form a brightness mode without alignment film.Type: ApplicationFiled: October 9, 2009Publication date: April 15, 2010Inventor: Jinmahn Kim
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Publication number: 20100060812Abstract: A liquid crystal display panel capable of reducing a capacitance of a parasitic capacitor between a data line and a pixel electrode. The liquid crystal display panel comprises: a thin film transistor at a crossing of a gate line and a data line, liquid crystal cells including a pixel electrode connected to the thin film transistor; first shield patterns in the liquid crystal cells, each shield pattern being parallel to the data line without overlapping the data line, wherein the shield patterns are insulated from and overlap with an outer portion of the pixel electrode; and a common line arrayed to connect the shield patterns for each the liquid crystal cell.Type: ApplicationFiled: November 16, 2009Publication date: March 11, 2010Inventors: Hong Sung Song, Sai Chang Yun, Sang Chang Yun, Jae Woo Lee
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Patent number: 7629953Abstract: An OCB-mode liquid crystal device includes a plurality of pixel electrodes arranged in a matrix on one substrate of a pair of substrates, and transferring an aligned state of liquid crystal sandwiched between the pair of substrates from spray alignment in an initial state to bend alignment to perform display. During the transfer, a voltage application operation of applying an equal voltage to a plurality of pixel electrodes corresponding to an arbitrary first row, and of applying, to two pixel electrodes adjacent to both sides of one arbitrary pixel electrode among a plurality of pixel electrodes in a second row adjacent to the first row in a column direction, both voltages which are higher than or lower than an applied voltage to the one pixel electrode is performed on at least some of the plurality of pixel electrodes arrayed in a matrix.Type: GrantFiled: April 25, 2006Date of Patent: December 8, 2009Assignee: Seiko Epson CorporationInventor: Kosuke Fukui