Patents by Inventor Daiichi Suzuki
Daiichi Suzuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20070132920Abstract: [PROBLEMS] To reduce the blue tone in the black display of the OCB liquid crystal display device. [MEANS FOR SOLVING THE PROBLEMS] A liquid crystal display cell (11) includes: an opposing substrate (130) having an opposing electrode (Ecom); an array substrate (120) having a pixel electrode Dpix for each color; a liquid crystal layer (140) arranged in a bend arrangement located between the opposing substrate (120) and the array substrate (120); and red, green, and blue filter layers arranged on one of the substrates.Type: ApplicationFiled: October 21, 2004Publication date: June 14, 2007Applicant: Toshiba Matsushita Display Technology Co., LtdInventors: Daiichi Suzuki, Kazuhiro Nishiyama, Mitsutaka Okita, Shigesumi Araki
-
Publication number: 20070132688Abstract: In an OCB liquid crystal display device, a gradation voltage of a video signal is set to be lower than a black display optimum voltage, and a reverse transition prevention voltage is set to be higher than the black display optimum voltage and to be lower than a maximum applied voltage, and as the gradation voltage of the video signal becomes low, the reverse transition prevention voltage is set to be high.Type: ApplicationFiled: November 28, 2006Publication date: June 14, 2007Applicant: Toshiba Matsushita Display Technology Co., LtdInventors: Shigesumi ARAKI, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki
-
Publication number: 20070120809Abstract: A liquid crystal display device includes a liquid crystal display panel having pixels, a light source which illuminates the display panel, and a control unit which controls the display panel and the light source. The control unit includes an insertion unit which causes the pixel to store a first voltage corresponding to a video signal in a first period within one frame period and to store a second voltage corresponding to a non-video signal in a second period that follows the first period, and a driving unit which enables the light source at least in a period corresponding to the first period in which the first voltage is held in the pixel, and disables the light source in a period corresponding to the second period in which the second voltage is held in the pixel, and is configured to set the first and second voltages at different independent values.Type: ApplicationFiled: November 29, 2006Publication date: May 31, 2007Inventors: Shigesumi ARAKI, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki
-
Publication number: 20070097064Abstract: A display control circuit which controls a display panel on which a plurality of pixels having an optical control layer between a pair of substrates are allocated in a substantial matrix form, the circuit includes a temperature detecting unit which detects a temperature relating to a temperature of the display panel, and a display panel drive unit which periodically outputs to the each pixel a gradation signal that corresponds to a video image signal, wherein the display panel drive unit has a setting unit which sets a gradation signal corresponding to the video image signal in response to a temperature of the display panel, the temperature having been detected by the temperature detecting unit and an overdrive output unit which, in response to a change of gradation of the video image signal, outputs another gradation signal instead of the gradation signal in at least a one-cycle period after the change.Type: ApplicationFiled: October 27, 2006Publication date: May 3, 2007Inventors: Mitsutaka Okita, Kenji Nakao, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
-
Publication number: 20070091056Abstract: A liquid crystal display device includes a liquid crystal display panel, which includes a pair of substrates and a liquid crystal layer held between the substrates, illumination means for illuminating the panel, and a control unit which controls the panel and the illumination means. The panel includes a plurality of display pixels arrayed in a matrix manner. The control unit includes non-video signal insertion means for cyclically writing a video signal and a non-video signal as pixel voltages in each of the pixels, synchronizing means for synchronizing a turn-on timing or a turn-off timing of the illumination means with a timing at which the video signal or the non-video signal is written in the pixels, and phase control means for changing a turn-on period and the turn-on timing of the illumination means.Type: ApplicationFiled: October 19, 2006Publication date: April 26, 2007Inventors: Mitsutaka Okita, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
-
Publication number: 20070076144Abstract: A liquid crystal display cell (110) includes: an opposing substrate (130) having an opposing electrode (Ecom); an array substrate (120) having a pixel electrode Dpix for each color; a liquid crystal layer (140) arranged in a bend arrangement located between the opposing substrate (120) and the array substrate (120); and red, green, and blue filter layers (CF(R), CF(G), CF(B)) arranged on one of the substrates.Type: ApplicationFiled: October 21, 2004Publication date: April 5, 2007Applicant: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Mitsutaka Okita, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
-
Publication number: 20070070024Abstract: A liquid crystal display device, which performs color display by sequentially displaying different color images in a time division manner and mixing the color images, includes a liquid crystal display panel in which a liquid crystal layer is held between a pair of substrates, color light sources of a plurality of colors, and a controller circuit which controls each of the color light sources and the liquid crystal display panel. The controller circuit controls a time opening ratio and an emission light luminance of one of the color light sources, which emits light of a color with which coloring occurs in transmissive light emerging from the liquid crystal display panel at a time of black display, thereby reducing the coloring of the transmissive light and maintaining a white balance.Type: ApplicationFiled: September 22, 2006Publication date: March 29, 2007Inventors: Shigesumi Araki, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki
-
Publication number: 20060221283Abstract: Optical compensation elements include first phase plates and second phase plates, which have retardation in a thickness direction. When a value ?n/?n? is set by normalizing a retardation amount ?n·d relating to light of each of wavelengths by a retardation amount ?n?·d relating to light of a predetermined wavelength ?, a normalized value ?n/?n? in the first phase plate is less than a normalized value ?n/?n? in a liquid crystal layer, and a normalized value ?n/?n? in the second phase plate is greater than the normalized value ?n/?n? in the liquid crystal layer, with respect to light of wavelengths other than the predetermined wavelength.Type: ApplicationFiled: May 26, 2006Publication date: October 5, 2006Inventors: Kenji Nakao, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki, Shigesumi Araki
-
Publication number: 20060215093Abstract: Optical compensation elements include first phase plates and second phase plates, which have retardation in a front-plane direction. When a value ?n/?n? is set by normalizing a retardation amount ?n·d relating to light of each of wavelengths by a retardation amount ?n?·d relating to light of a predetermined wavelength ?, a normalized value ?n/?n? in the first phase plate is greater than a normalized value ?n/?n? in a liquid crystal layer, and a normalized value ?n/?n? in the second phase plate is less than the normalized value ?n/?n? in the liquid crystal layer, with respect to light of wavelengths other than the predetermined wavelength.Type: ApplicationFiled: May 26, 2006Publication date: September 28, 2006Inventors: Kenji Nakao, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki, Shigesumi Araki
-
Publication number: 20060152659Abstract: A liquid crystal display according to the invention includes a liquid crystal display element (100) having a liquid crystal layer (4) containing liquid crystal molecules oriented so as to assume a bend alignment when an image display is being made, and at least one retardation plate for compensating for a retardation of the liquid crystal layer, wherein the display is made by varying the retardation of the liquid crystal layer in accordance with video signals inputted from outside to vary the transmittance of the liquid crystal display element to light for display, characterized in that: the liquid crystal display element (100) includes a plurality of red pixels for displaying a red color, a plurality of green pixels for displaying a green color, and a plurality of blue pixels for displaying a blue color; and a thickness (53B) of the liquid crystal layer (4) associated with the blue pixels is larger than a thickness (53R,53G) of the liquid crystal layer associated with the red pixels and/or the green pixels.Type: ApplicationFiled: March 14, 2006Publication date: July 13, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Shoichi Ishihara, Daiichi Suzuki, Mitsutaka Okita, Kenji Nakao, Yoshinori Tanaka, Tsuyoshi Uemura
-
Patent number: 7057684Abstract: A liquid crystal display according to the invention includes a liquid crystal display element (100) having a liquid crystal layer (4) containing liquid crystal molecules oriented so as to assume a bend alignment when an image display is being made, and at least one retardation plate for compensating for a retardation of the liquid crystal layer, wherein the display is made by varying the retardation of the liquid crystal layer in accordance with video signals inputted from outside to vary the transmittance of the liquid crystal display element to light for display, characterized in that: the liquid crystal display element (100) includes a plurality of red pixels for displaying a red color, a plurality of green pixels for displaying a green color, and a plurality of blue pixels for displaying a blue color; and a thickness (53B) of the liquid crystal layer (4) associated with the blue pixels is larger than a thickness (53R, 53G) of the liquid crystal layer associated with the red pixels and/or the green pixels.Type: GrantFiled: October 17, 2003Date of Patent: June 6, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shoichi Ishihara, Daiichi Suzuki, Mitsutaka Okita, Kenji Nakao, Yoshinori Tanaka, Tsuyoshi Uemura
-
Patent number: 6933916Abstract: A liquid crystal display of the present invention is adapted to perform initialization by inputting voltages with different polarities to two pixel electrodes (23á, 23â) adjacent in front and back direction. It is preferable that in the two pixel electrodes (23á, 23â) adjacent in front and back direction, the pixel electrode (23á) located on back side is provided with a first protrusion (232á) at a front side and back direction, the pixel electrode (231â) adjacent in front and back is provided with a second protrusion (23â) located on front side is provided with a second a second protrusion (234â) on a back side edge (233â)thereof.Type: GrantFiled: December 18, 2001Date of Patent: August 23, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kenji Nakao, Daiichi Suzuki, Yoshinori Kobayashi, Katsuyuki Arimoto, Katsuhiko Kumagawa, Ichiro Sato, Keisuke Tsuda, Hirofumi Wakemoto, Hiroyuki Yamakita, Masanori Kimura, Yoshinori Tanaka, Akinori Shiota
-
Patent number: 6853435Abstract: A liquid crystal display includes two substrates and a liquid crystal layer sandwiched between the substrates and performs display by changing the orientation of the liquid crystal layer from a splay orientation to a bend orientation. Application of a voltage of less than a threshold voltage to the liquid crystal layer allows the liquid crystal layer to have a region where liquid crystal molecules parallel to the substrates predominantly lie on one substrate side and a region where those liquid crystal molecules predominantly lie on the other substrate side, and the two regions are present in substantially equal proportions. In a similar liquid crystal display, the absolute value of a pretilt angle of the liquid crystal molecules in the vicinity of one substrate differs from the absolute value of a pretilt angle of the liquid crystal molecules in the vicinity of the other substrate, and at least one of the substrates is provided with a bend transition nucleus induction means.Type: GrantFiled: October 23, 2001Date of Patent: February 8, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Tanaka, Shoichi Ishihara, Kenji Nakao, Keisuke Tsuda, Junichi Kobayashi, Tsuyoshi Uemura, Daiichi Suzuki
-
Patent number: 6661491Abstract: Disclosed is a liquid crystal display comprising: a pair of opposed substrates; a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer having a display alignment state and a non-display alignment state which differ from each other and being subjected to an initialization process so as to be changed from the non-display alignment state to the display alignment state before an image is displayed; storage capacitor electrodes provided on one of the pair of substrates; pixel electrodes provided so as to overlap with the storage capacitor electrodes with an insulator interposed therebetween and disposed between the storage capacitor electrode and the liquid crystal layer, the pixel electrode having a lack portion in a region overlapping with the storage capacitor electrode; and drive means for generating potential difference between the storage capacitor electrode and the pixel electrode to thereby perform the initialization process.Type: GrantFiled: June 4, 2002Date of Patent: December 9, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Yamakita, Akinori Shiota, Kenji Nakao, Daiichi Suzuki, Masanori Kimura, Yoshinori Tanaka
-
Publication number: 20030151710Abstract: A liquid crystal display includes two substrates and a liquid crystal layer sandwiched between the substrates and performs display by changing the orientation of the liquid crystal layer from a splay orientation to a bend orientation. Application of a voltage of less than a threshold voltage to the liquid crystal layer allows the liquid crystal layer to have a region where liquid crystal molecules parallel to the substrates predominantly lie on one substrate side and a region where those liquid crystal molecules predominantly lie on the other substrate side, and the two regions are present in substantially equal proportions. In a similar liquid crystal display, the absolute value of a pretilt angle of the liquid crystal molecules in the vicinity of one substrate differs from the absolute value of a pretilt angle of the liquid crystal molecules in the vicinity of the other substrate, and at least one of the substrates is provided with a bend transition nucleus induction means.Type: ApplicationFiled: September 25, 2002Publication date: August 14, 2003Inventors: Yoshinori Tanaka, Shoichi Ishihara, Kenji Nakao, Keisuke Tsuda, Junichi Kobayashi, Tsuyoshi Uemura, Daiichi Suzuki
-
Patent number: 6603525Abstract: Disclosed is a liquid crystal display comprising: a pair of opposed substrates; a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer having a display alignment state and a non-display alignment state which differ from each other and being subjected to an initialization process so as to be changed from the non-display alignment state to the display alignment state before an image is displayed; storage capacitor electrodes provided on one of the pair of substrates; pixel electrodes provided so as to overlap with the storage capacitor electrodes with an insulator interposed therebetween and disposed between the storage capacitor electrode and the liquid crystal layer, the pixel electrode having a lack portion in a region overlapping with the storage capacitor electrode; and drive means for generating potential difference between the storage capacitor electrode and the pixel electrode to thereby perform the initialization process.Type: GrantFiled: January 25, 2002Date of Patent: August 5, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Yamakita, Akinori Shiota, Kenji Nakao, Daiichi Suzuki, Masanori Kimura, Yoshinori Tanaka
-
Patent number: 6600540Abstract: Disclosed is a liquid crystal display comprising: a pair of opposed substrates; a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer having a display alignment state and a non-display alignment state which differ from each other and being subjected to an initialization process so as to be changed from the non-display alignment state to the display alignment state before an image is displayed; storage capacitor electrodes provided on one of the pair of substrates; pixel electrodes provided so as to overlap with the storage capacitor electrodes with an insulator interposed therebetween and disposed between the storage capacitor electrode and the liquid crystal layer, the pixel electrode having a lack portion in a region overlapping with the storage capacitor electrode; and drive means for generating potential difference between the storage capacitor electrode and the pixel electrode to thereby perform the initialization process.Type: GrantFiled: June 4, 2002Date of Patent: July 29, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Yamakita, Akinori Shiota, Kenji Nakao, Daiichi Suzuki, Masanori Kimura, Yoshinori Tanaka
-
Publication number: 20030122767Abstract: A liquid crystal display of the present invention is adapted to perform initialization by inputting voltages with different polarities to two pixel electrodes (23á, 23â) adjacent in front and back direction. It is preferable that in the two pixel electrodes (23á, 23â) adjacent in front and back direction, the pixel electrode (23á) located on back side is provided with a first protrusion (232á) at a front side edge (231á) thereof and in the two pixel electrodes adjacent in front and back direction, the pixel electrode (23â) located on front side is provided with a second protrusion (234â) on a back side edge (233â) thereof.Type: ApplicationFiled: October 9, 2002Publication date: July 3, 2003Inventors: Kenji Nakao, Daiichi Suzuki, Yoshinori Kobayashi, Katsuyuki Arimoto, Katsuhiko Kumagawa, Ichiro Sato, Keisuke Tsuda, Hirofumi Wakemoto, Hiroyuki Yamakita, Masanori Kimura, Yoshinori Tanaka, Akinori Shiota
-
Publication number: 20030011732Abstract: A liquid crystal display according to the invention includes a liquid crystal display element (100) having a liquid crystal layer (4) containing liquid crystal molecules oriented so as to assume a bend alignment when an image display is being made, and at least one retardation plate for compensating for a retardation of the liquid crystal layer, wherein the display is made by varying the retardation of the liquid crystal layer in accordance with video signals inputted from outside to vary the transmittance of the liquid crystal display element to light for display, characterized in that: the liquid crystal display element (100) includes a plurality of red pixels for displaying a red color, a plurality of green pixels for displaying a green color, and a plurality of blue pixels for displaying a blue color; and a thickness (53B) of the liquid crystal layer (4) associated with the blue pixels is larger than a thickness (53R, 53G) of the liquid crystal layer associated with the red pixels and/or the green pixels.Type: ApplicationFiled: August 28, 2002Publication date: January 16, 2003Inventors: Shoichi Ishihara, Daiichi Suzuki, Mitsutaka Okita, Kenji Nakao, Yoshinori Tanaka, Tsuyoshi Uemura
-
Publication number: 20020149551Abstract: Disclosed is a liquid crystal display comprising: a pair of opposed substrates; a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer having a display alignment state and a non-display alignment state which differ from each other and being subjected to an initialization process so as to be changed from the non-display alignment state to the display alignment state before an image is displayed; storage capacitor electrodes provided on one of the pair of substrates; pixel electrodes provided so as to overlap with the storage capacitor electrodes with an insulator interposed therebetween and disposed between the storage capacitor electrode and the liquid crystal layer, the pixel electrode having a lack portion in a region overlapping with the storage capacitor electrode; and drive means for generating potential difference between the storage capacitor electrode and the pixel electrode to thereby perform the initialization process.Type: ApplicationFiled: June 4, 2002Publication date: October 17, 2002Applicant: Matsushita electric Industrial Co., Ltd.Inventors: Hiroyuki Yamakita, Akinori Shiota, Kenji Nakao, Daiichi Suzuki, Masanori Kimura, Yoshinori Tanaka