Abstract: An integrated illumination apparatus includes a light injection portion having a first end for receiving light from a light source. The light injection portion includes material that supports propagation of said light along the length of the light injection portion. Turning microstructure is disposed on a first side of the light injection. The turning microstructure is configured to turn at least a substantial portion of light incident on the first side and to direct the portion of the light out a second opposite side of the light injection portion. A slit is disposed along the length of the light injection portion. The slit forms an optical interface on the second opposite side of the light injection portion that provides total internal reflection for light propagating along the length of the light injection portion to be guided therein. The optical interface further transmits light turned by said turning microstructure.

Abstract: A multimedia system and a remote control device are provided. The multimedia system includes a remote sensor, a wireless transmitter, and a display apparatus. The remote sensor is used for sensing an environmental luminance. The wireless transmitter is used for transmitting a control signal corresponding to the environmental luminance. The display apparatus includes a light source and a wireless receiver. The display apparatus receives the control signal via the wireless receiver and adjusts a brightness level of the light source based on the control signal.

Abstract: A photo-sensing type touch panel embedded liquid crystal display device and a method for driving same are disclosed, where the device includes a liquid crystal panel includes a touch sensor provided in each of n pixels, where n is a Natural Number; a ROIC readout part which receives a readout voltage value from readout lines provided in the touch panel embedded liquid crystal panel; an ADC conversion part which converts an analog voltage value transmitted to the ROIC readout part into a digital value; a calculation part which calculates a calculated value by subtracting a corresponding value detected from the ADC conversion part when no-backlight is applied from a value detected from the ADC conversion part when a backlight is applied; and a position detection part for detecting a touch point on the photo-sensing type touch panel if the calculated value from the calculation part is beyond a predetermined value.

Abstract: An LED backlight array in which every LED, regardless of whether it is a red, green, cyan, or blue LED, contains a blue emitter. As each LED contains the same type of emitter, the backlight can be driven by a single blue driver circuit, rather than separate red, green, cyan, and blue drivers. That is, the present disclosure removes the need for red, cyan, and green driver circuits, allowing for simpler and cheaper backlights. Additionally, even though the LED backlight can contain LEDs of different colors, each has a blue emitter, and thus possesses similar aging characteristics.

Abstract: What is provided is a liquid crystal display unit (1), including: a first liquid crystal display element (2) for displaying an image; an accessory (4) provided behind the first liquid crystal display element (2); and a surface light source (3) provided between the first liquid crystal display element (2) and the accessory (4), the surface light source (3) being movable, and the surface light source (3) being moved (i) so that the accessory (4) is shielded in a first case where the image, displayed by the first liquid crystal display element (2), is viewed by a primary viewer of the first liquid crystal display element (2) and (ii) so that the accessory (4) is not shielded in a second case where the accessory (4) is viewed by the primary viewer. This makes it possible to fully shield, with a simple configuration, the accessory provided behind a liquid crystal display device.

Abstract: Provided are a display apparatus and a method for controlling a backlight. A display apparatus including a backlight partitioned into a plurality of sections according to an exemplary embodiment of the present invention includes: an external brightness measurer measuring and providing front brightness values of the display apparatus corresponding to the sections; an image signal analyzer analyzing an inputted image signal and calculating and providing a brightness influence value of each section by adjacent sections; and a control signal corrector converting a source backlight control signal of each section corresponding to the image signal into an intermediate backlight control signal of each section on the basis of the front brightness values and the brightness influence values of the sections and comparing the intermediate backlight control signal with the previous final backlight control signal to generate the current final backlight control signal.

Abstract: A backlight driving apparatus of a liquid crystal display (LCD) apparatus including a master trans and a slave trans for supplying a current to a plurality of lamps, and a master driver and a slave driver for driving the lamps, includes an operated condition unit that converts an AC voltage generated in accordance with a phase difference between a master AC voltage and a slave AC voltage fed back from the master trans and the slave trans, respectively, into an analog DC voltage; a protect controller that determines an error is generated during an operation of the lamps using the analog DC voltage and outputs an operating error signal when an error is generated; and a lamp driving controller that stops driving the master driver and the slave driver in response to the operating error signal.

Abstract: Disclosed embodiments relate to techniques for enhancing luminance resolution in a backlight unit. A backlight unit may have light-emitting diode (LED) light sources arranged in strings. In one embodiment, a backlight controller provides enhanced luminance resolution by drive each LED string at either first or second consecutive luminance values corresponding to first and second duty cycles of a pulse width modulation (PWM) signal. The outputs of the LED strings are optically mixed to achieve intermediate luminance values between the first and second luminance values.

Abstract: In a display device, pixel electrodes I, II and III corresponding to color filters R, G and B are coupled to TFTs which are turned on in accordance with signals on gate lines G, and the drain (source) of the TFT coupled to the pixel electrode II is connected with the source (drain) of the TFT coupled to the pixel electrode III. A signal voltage is written in the pixel electrode I when the gate line G1a is in the “on” state, a signal voltage is written in the pixel electrode II when the gate line G1b is in the “on” state, and a signal voltage is written in the pixel electrode III when the gate lines G1a and G1b are both in the “on” state. Signal voltages are written in the pixel electrodes III, I and II in this order mentioned.

Abstract: Electrophoretic particles including mother particles and a dispersant that covers the surface of the mother particles, the mother particles including a resin and a colorant, and the dispersant having a structure represented by the following Formula (1): wherein in Formula (1), R1 represents a dimethyl siloxane chain that comprises two or more dimethyl siloxane structures that are linked together, the dimethyl siloxane chain being optionally substituted by an organic group; R2 represents a hydrogen atom or a methyl group; Ar1 represents an organic group having an aromatic group; a represents an integer of from 8 to 88; b represents an integer of from 12 to 82; c represents an integer of from 0 to 30; f represents an integer of from 1 to 3; the total of a, b and c is 100; and the ratio of unit (b) in the dispersant having a structure represented by Formula (1) is about 50% by weight or less.

Abstract: There are provided an electronic paper display device and a method of manufacturing the same. The electronic paper display device includes first and second substrates disposed to be opposite to each other with a predetermined interval therebetween; barrier ribs formed between the first and second substrates and providing a plurality of cell spaces; first display units disposed in the cell spaces; and second display units inserted into at least one region of the first substrate, the second substrate, and the barrier ribs. Whereby, the image precision of the electronic paper display device may be improved and the contrast and brightness thereof may be improved.

Abstract: The present invention discloses an interactive game method with sports injury protection, comprising: providing a remote pointing device for a user to swing; and triggering a safety mechanism in one or more of the following conditions: (1) when a user swings the remote pointing device drastically; (2) when a count of swings exceeds a first threshold; and (3) when a count of swings in a predetermined time period exceeds a second threshold.

Abstract: A game apparatus calculates a first evaluation value based on the difference between the time when the load value detected by a load controller becomes the maximum and the time when the velocity of the center of gravity, which represents the velocity of movement of the position of the center of gravity, becomes the maximum. The game apparatus calculates a second evaluation value based on the velocity of load, which represents the degree of increase in the load in a predetermined time period, and the velocity of the center of gravity. The game apparatus calculates a third evaluation value based on the path of the position of the center of gravity. The game apparatus calculates the amount of slice based on the first through third evaluation values.

Abstract: A remote control system, set forth by way of example and not limitation, includes a remote control device including one or more controls operative to develop at button control signals in response to activation by a user. An interface device is responsive to the button control signals and is operative to provide device control signals via a wired connection to an electronic display device. The device control signals are operative to control an application running on an electronic display device.

Abstract: A mobile terminal including a body having at least one partial region including a flexible material; a flexible display to display information; a sensor unit to detect a first physical bending of the flexible display; and a controller to display a prescribed mark to a specific region of the flexible display based on the detected bending of the flexible display.

Abstract: Apparatus has at least one processor and memory having computer-readable when executed, in a normal mode, to cause display of plural discrete items on a touch screen, and in response to detecting a user's digit at a location hovering over but not touching the screen while plural discrete items are being displayed, to enter a zoom-pan mode and cause zooming of displayed plural discrete items and to respond to detection of movement of the user's digit to a different hover location over the screen by causing panning of plural discrete items displayed on the screen, and to respond to detection of a touch input by entering a pointing mode to prevent panning of the displayed plural discrete items with movement of location of the touch input within predefined criteria, and to cause movement of a cursor, pointer or marker as location of the touch input changes.

Abstract: Provided is an apparatus and method for detecting a tap. The apparatus includes a sensor configured to detect a motion and output a signal corresponding to the motion, a gradient calculating unit connected to the sensor to calculate a gradient of the output signal from the sensor, a similarity determining unit connected to the gradient calculating unit to determine a similarity between a rising gradient and a falling gradient of a curve of the output signal, a tap determining unit connected to the similarity determining unit to determine detection of a tap according to the determination result of the similarity determining unit, and an output unit configured to output the determination result of the tap determining unit.

Abstract: Method and arrangement that provides a power-saving mode for a handheld electronic device having a reduced alphabetic keyboard. The power-saving mode is enabled through disabling a sensor that detects motion of a ball of the trackball navigation tool and disabling the display screen of the handheld electronic device. The power-saving mode may be exited before disablement of the sensor when the display screen is disabled first.

Abstract: Systems, products, and methods are disclosed for facilitating a method of mapping a numerical keypad to keys of a keyboard on a mobile communications device based on an initial selection of an edge key. One embodiment of the method includes receiving input by way of a given key of the keypad and then dynamically configuring that given key to be a numerical key of a numerical keypad. In particular, input received by way of the numerical key is interpreted as a corresponding numeral regardless of a prior configuration associated with the numerical key. Further, keys of a keyboard within a proximity of the numerical key are mapped to remaining numerical keys of the numerical keypad.

Abstract: A keyboard for an electronic device includes a main body, a test indicator positioned on an outside surface of the main body, and an interface electrically connected to both the main body and the test indicator. Both the main body and the test indicator are electrically connected to a main board of an electronic device through the interface. The electronic device can be operated using the keyboard, and the test indicator indicates the working status of the electronic device.

Abstract: A mobile terminal is disclosed, by which the feel of manipulation of a mobile terminal keypad is enhanced and by which brightness deviation of keypad illumination is minimized. The present invention includes at least one or more light sources, a keypad having a plurality of manipulating buttons, each having a button protrusion provided to a bottom of the corresponding manipulating button, a light guide film configured to have light provided by the at least one light source enter a lateral side thereof, the light guide film having a plurality of insertion holes configured to have the button protrusions pass through, respectively, and a printed circuit board having a dome switch pressurized by the button protrusion of the keypad and an electrode part selectively coming contact with the dome switch, wherein a width of at least one of the insertion holes provided to the light guide film is different from a length thereof.

Abstract: A digital book comprising a casing which is adapted to be folded open and shut like a book and which has at least one folding axis (A), a main part (1) and at least one secondary part (2), said parts together forming a book back part (BR). A display unit consists of at least two parts and is arranged in such a way that when the casing is folded out, the main part (1) and the at least one secondary part (2) are each presented to the user with at least one screen each, like pages of a book, for looking at or optionally, for working on as required. The digital book contains a control unit with means for receiving, storing, processing and reproducing information, and at least one operating unit (6) with operating elements for using the digital book as a device for receiving/processing/reproducing information.

Abstract: Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate. Alternatively, some touch sensing elements can be between the color filter and array plates with other touch sensing elements not between the plates. In another alternative, all touch sensing elements can be between the color filter and array plates. The latter alternative can include both conventional and in-plane-switching (IPS) LCDs. In some forms, one or more display structures can also have a touch sensing function. Techniques for manufacturing and operating such displays, as well as various devices embodying such displays are also disclosed.

Abstract: Disclosed is a portable terminal including a window for inputting information by a touching manner, a terminal body having a display module which is mounted therein and a window mounting portion for mounting the window at a front surface of the display module, and a coupling unit having one end inserted into the window and another end coupled to the window mounting portion so as to couple the window to the terminal body. The window and the terminal body are structurally coupled to each other, thereby providing stronger coupling force between the window and the terminal body.

Abstract: A method performed by a device having a touch panel may include detecting a touch on the touch panel, determining a dimension of the touch, identifying the touch as a standard tap or a full tap based on the dimension of the touch, and generating a command signal based on the identifying of the touch as the standard tap or the full tap.

Abstract: A method and system for changing the power state of a portable electronic device is disclosed. A portable electronic device may be powered up or powered down responsive to a user interaction with the portable electronic device. The user interaction may be an insertion of a stylus or other user interface object into a housing of the portable electronic device. Alternatively, the user interaction may be a removal of a stylus or other user interface object from the housing of the portable electronic device. The user interaction may be a rotation of a cover of the portable electronic device.

Abstract: A flexible display device and a data displaying method thereof are disclosed. The device includes a touch sensor to generate touch events according to touch actions, a flexible sensor to generate a bend signal as one side of the device is bent, a storage unit to store a function table, and a controller to control the components of the device. The function table is configured to define control operations to reproduce currently output contents based on the touch events and the bend events.

Abstract: A display includes: a display section having a plurality of pixels provided in a region where a first substrate and a second substrate are disposed opposite to each other; a switch provided in the region where the first substrate and the second substrate are disposed opposite to each other, the switch having two electrodes closed by a pressure from outside; a detecting section comparing a signal from the switch with a reference signal to determine whether the switch is closed or not; and a precharge section applying a precharge potential to a wiring in continuity with one of the electrodes of the switch prior to the detection at the detecting section.

Abstract: The invention discloses a touch sensing circuit applied to a capacitance touch panel for detecting the position of a sensed object touching the capacitance touch panel. The touch sensing circuit includes a first signal supplying module, a second signal supplying module, a first measurement module, a second measurement module and a processing module. The first signal supplying module inputs signals in turn to first sensing lines arranging along the first direction. The second signal supplying module inputs signals in turn to second sensing lines arranging along the second direction. The first measurement module and the second measurement module are used for measuring the first equivalent capacitances of the first sensing lines and that of the second sensing lines. The processing module is coupled to first measurement module and the second measurement module for determining the position of the sensed object.

Abstract: Provided is an electrostatic capacitance type touch panel, wherein lead lines are connected to respective end portions of at least either one of the X electrodes and the Y electrodes respectively, the touch panel further comprises an inspection electrode which is laminated to respective end portions of the at least either one of the X electrodes and the Y electrodes with an insulation film sandwiched therebetween on a side where the lead lines are not connected to the at least either one of the X electrodes and the Y electrodes, and a voltage for inspection is supplied to the inspection electrode during an inspection time and a voltage at the same phase as the drive voltage supplied to the at least either one of the X electrodes and the Y electrodes is supplied to the inspection electrode during a usual operation time.

Abstract: A mobile terminal is provided. The mobile terminal comprises: a touchscreen controllable to display at least one home screen or a lock screen; and a controller configured to: control the touchscreen to display the at least one home screen when the mobile terminal is in a standby state, one of the at least one home screen displaying at least one application object including one or more widget objects; and control the touchscreen to display the lock screen when the mobile terminal is switched from the standby state to a locked state. The lock screen displays a specific widget object of the one or more widget objects if the specific widget object was selected by a user for the lock screen.

Abstract: In a touch panel incorporating a display device, a first sensor line (120) narrower than a first dummy line (130) is disposed on an interlayer insulating film (240) formed on an insulating substrate (100) at a location corresponding to a first dummy line (130), and a second sensor line (150) narrower than the data line (140) is formed on the interlayer insulating film (240) at the location corresponding to the data line (140). The first sensor line (120) and the second sensor line (150) are disposed such that they do not extend beyond the widths of the first dummy line (130) and the data line (140), respectively, when observed in a plan view. Provided is a touch panel incorporating a display device in which the locations of the first sensor line (120) and the second sensor line (150) are adjusted to prevent the aperture ratio reduction in the display element section (11).

Abstract: An information processing apparatus includes a touch panel which displays pieces of identification information including letters, figures, and symbols and detects a contact of the panel with a finger of a user or other object. When the touch panel detects the contact of the panel, a detection unit specifies identification information of one or more of the multiple pieces of identification information displayed on the touch panel, indicated by a position at which the contact in question occurred. The detection unit also detects an area of part of the panel where the contact occurred. A storage unit stores reference identification information and a reference area range. A control unit performs particular processing upon matching of the detected identification information with the stored reference identification information and the area of the contact detected by the detection unit falling within the stored reference area range.

Abstract: The present invention relates to a touch location detecting panel and, more particularly, to a touch location panel having a plurality of sensing areas arranged two-dimensionally. The touch location detecting panel of the invention has on a surface at one side of a single film a plurality of sensing areas arranged two-dimensionally. Each of the sensing areas includes a plurality of partitioned areas electrically isolated from each other, and the partitioned areas are respectively connected to separate channels of a circuit for detecting a user's touch on each of the partitioned areas. Accordingly, durability and productivity of the touch location detecting panel can be improved by simplifying the panel structure.

Abstract: A method for controlling a foldable display device includes detecting a state of a foldable display unit, the foldable display unit being in a folded state when the foldable display device is folded and being in an unfolded state when the foldable display device is unfolded, and the foldable display unit being divided into a first area which is a border area, a second area which is a folding area and a third area located between the first area and the second area, deactivating touch sensor units of the first area and the second area and activating a touch sensor unit of the third area, if the foldable display unit is in the folded state, and deactivating the touch sensor unit of the first area and activating the touch sensor units of the second area and the third area, if the foldable display unit is in the unfolded state.

Abstract: To provide a touch sensor device and the like, which can improve the detecting accuracy of a surface-capacitive type touch sensor. A touch sensor device of the present invention includes: a touch panel which forms a capacitance between a human body and itself when the human body makes a contact or approaches thereto; a power supply part which has a battery or the like which outputs a DC voltage, converts the DC voltage to an AC voltage, and outputs the AC voltage from the touch panel; a reference potential part to be a reference potential of the AC voltage; a wrist strap and a cable which are electrically connected to the reference potential part and to which the human body makes a contact; and a current detecting part which detects electric currents flown from the power supply part to the human body.

Abstract: An electrostatic capacitive touch sensor device includes sensing electrode provided at a plurality of positions, a high-frequency signal source that applies a high-frequency signal to the sensing electrode through a predetermined impedance element, a wiring portion that connects the sensing electrode and the impedance element, a shield portion provided to embrace the sensing electrodes and the connecting pattern, and a shield signal source that applies a shield signal to the shield portion and has the same phase and amplitude as the high-frequency signal source.

Abstract: A capacitive touch sensor includes horizontal lines vertical lines. Switching circuitry is coupled to the horizontal and vertical lines of the capacitive touch sensor. The switching circuitry is operable in a first mode to configure the horizontal lines as receive lines and the vertical lines as transmit lines for making a cross-capacitance measurement. In one implementation, the switching circuit is further operable in a second mode to configure the horizontal lines as transmit lines and the vertical lines as receive lines for making an additional cross-capacitance measurement. In another implementation, the switching circuit is further operable in a second mode to configure the vertical lines for making a self capacitance measurement. The various capacitance measurements from the first and second modes are algorithmically combined to obtain a total capacitance measurement having a reduced noise component.

Abstract: A data processing apparatus is arranged to receive successive images from a video camera. The apparatus includes means for detecting inter-image motion for selected points in an image region associated with a control function of the apparatus. The apparatus also includes means for executing the control function if inter-image motion is detected in the image region. The detecting means is configured to select points in an image region of a current image that are validated by selecting test points in a currently received image based upon their correspondence with points in a preceding received image. The points in the preceding received image themselves corresponding with the points originally selected in the currently received image. The detecting means is also configured to deselect points in the current image whose corresponding test points do not substantially coincide therewith.

Abstract: An input device detects a position of an object in relation to a display by using the light emitting elements and light receiving elements. When the high accuracy is not required for the position detection, at least one of the light emitting elements and the light receiving elements is turned off.

Abstract: An optical position detecting unit can be configured at low cost and so as to have lower power consumption.

Abstract: An optical touch system includes a non-visible light source, a screen, a first and second polarizing elements, and an optical detector. The non-visible light source emits a non-visible beam. A part of the non-visible beam passes through the screen disposed in a light path of the non-visible beam. The touch object reflects the part of the non-visible beam into an object beam when a touch object approaches or touches the screen, and the object beam passes through the screen. The first polarizing element is disposed in the light path of the non-visible beam and between the non-visible light source and the screen. The optical detector is disposed in a light path of the object beam, and senses the object beam. The second polarizing element is disposed in the light path of the object beam passing through the screen and between the screen and the optical detector.

Abstract: An interactive display device (100) presents to a user (113) a visible image on an image layer (102) through a touching surface (101). The display device (100) has an illumination unit (107) that transmits infrared light and captures through the touching surface sets of infrared images of objects that are in the proximity of the touching surface. The display device (100) detects from the infrared images contact areas where a pointing object (112) is located with respect to the image layer (102) and casts in the infrared image a corresponding shadow. The illumination unit (107) alternates the infrared illumination so that each infrared image set has images taken with differing infrared illumination. Resulting variance in the shadows is used by the interactive display device (100) to detect whether the pointing object (112) contacts the touching surface (101) or not.

Abstract: Placement by one or more input mechanisms of a touch point of a mufti-touch display device that is displaying a three-dimensional object is detected. A two-dimensional location of the touch point on the multi-touch display device is determined, and the touch point is matched with a three-dimensional contact point on a surface of the three-dimensional object that is projected for display onto the image plane of the camera at the two-dimensional location of the touch point. A change in applied pressure at the touch point is detected, and a target depth value for the contact point is determined based on the changed in applied pressure. A solver is used to calculate a three-dimensional transformation of the three-dimensional object using an algorithm that reduces a difference between a depth value of the contact point after object transformation and the target depth value.

Abstract: An optical touch control system. A monitor includes a first side, a second side, a third side, and a fourth side sequentially connected to each other. A first light guide, a second light guide, and a third light guide are respectively disposed on the first, second, and third sides of the monitor. A first beam splitter is adjacent to the first and second light guides. A second beam splitter is adjacent to the second and third light guides. A first light source and a second light source are respectively adjacent to the first and second beam splitters. A first image sensor is disposed between the first and fourth sides of the monitor. A second image sensor is disposed between the third and fourth sides. The first and second image sensors receive light transmitted onto the monitor via the first, second, and third light guides, identifying touch control operations.

Abstract: A system, method, and computer program product for automatically providing a haptic stylus based interface for enhanced user interaction with touch screen devices are disclosed. The stylus communicates with the touch screen device to report stylus operating information from onboard sensors, and to receive application program instructions defining feedback and friction forces to be applied by onboard actuators. The applied feedback and friction forces may be independently controlled. Friction forces are provided via a rolling contact ball gripping mechanism that mimics varying physical engagement between the contact ball and a touch screen display surface by controlling the relative rotational freedom of the contact ball. Embodiments of the invention enable a haptic stylus to mimic three-dimensional interactions for gaming, object manipulation and sculpting, and non-contact proximity-based stylus operation scenarios.

Abstract: A shading signal generating circuit includes an output port, a first switch, a second switch, a third switch, a first control unit, a second control unit, and a resistor. The output port is electrically connected to the first switch, the second switch, and the third switch. The first switch is electrically connected to a first voltage source and switched on according to a clock signal. The second switch is electrically connected to a second voltage source. The first control unit converts the clock signal to an inverse clock signal, thereby outputting a switch signal for switching on the second switch. The resistor is connected between a third voltage source and the third switch in series. The third switch controls the electric connection between the output port and the third voltage source. The second control unit switches on the third switch according to the inverse clock signal and the switch signal.

Abstract: In a liquid crystal display device provided with a monolithic gate driver, a panel frame area is to be reduced as compared with a conventional configuration so that the device size can be reduced. In a region on an array substrate located outside of a display region, a third metal (503) is formed as a metal film in addition to a source metal (501) and a gate metal (502). The source metal (501) forms a wiring pattern that includes source electrodes of thin film transistors disposed in a pixel circuit and a gate driver, and the gate metal (502) forms a wiring pattern that includes gate electrodes of the thin film transistors. The third metal (503) is electrically connected to at least one of the source metal (501) and the gate metal (502) through a contact.

Abstract: A network-connectable projector having a first CPU that executes a web application program stored in a first memory, and a second CPU that controls a working state of the projector, based on working state information stored in a second memory. The second CPU obtains the working state information from the second memory, and transfers the information to the first CPU. The first CPU distributes the web page information including the working state information received from the second CPU to the web client upon receipt of the request from the web client. The first CPU makes the second CPU control the working state of the projector, based on control information that is sent back from the web client and is related to performance control of the projector.

Abstract: A matrix type display device including: a photosensor, provided in a display region, for outputting a signal corresponding to an intensity of light emitted to the photosensor; a TFT of n-channel type, the TFT serving as a source follower including a gate to which the signal is inputted; and light intensity detecting means for detecting the intensity of the light by detecting an output of the source follower, which is the TFT. In at least one embodiment, the TFT includes a drain to which a first pulse signal (Vpulse2) having a first pulse is inputted, the first pulse rising from a low level to a high level in a state where the signal is inputted to the gate of the TFT.