Abstract: An optical detection device includes: an optical sensing unit that has an optical detection transistor and outputs a signal corresponding to the amount of light irradiated to the optical detection transistor; a threshold voltage detecting unit that has a threshold value detection transistor that is provided adjacent to the optical detection transistor and is formed in the same process as the formation process of the optical detection transistor, the threshold voltage detecting unit detecting the threshold voltage of the threshold value detection transistor; a sensor output value generating unit that generates a sensor output value that relates to the amount of irradiating light on the basis of the signal outputted from the optical sensing unit; a correction coefficient determining unit that determines a correction coefficient that is used for correcting a change in the sensor output value that is caused by the optical degradation of the optical detection transistor and corresponds to the threshold voltage det

Abstract: A display device includes: first and second photosensors; a reader; a light detector outputting the light amount detected by the photosensors; a first circuit outputting a first signal based on incident light entering the first photosensor; and a second circuit outputting a second signal based on dimmed incident light entering the second photosensor. The reader includes: a coefficient calculator calculating a first measurement ratio of the first signal to the second signal, and a power correction coefficient; a rate calculator deriving modified power coefficients from the power correction coefficient, calculating a second measurement ratio of the power-corrected first and second signals, and calculating a slope correction coefficient; and an output unit deriving modified proportional coefficients from the slope correction coefficient, and correcting the power-corrected first and second signals using the modified proportional coefficients to yield outputted initial light amount signals.

Abstract: With the related art, the choice of locations for disposition of ambient light photosensors is narrow, and consequently it is difficult to respond flexibly to user specifications for differing structures of the case. With a display device of the invention however, ambient light photosensors can be disposed laterally and longitudinally, enabling the intensity of light in longitudinal or lateral directions to be sensed at the same levels. Also, bridge-connecting together the longitudinally-disposed ambient light photosensors enables ambient light photosensors to be disposed close to the outer periphery of the display area in both the longitudinal and lateral directions. Thereby, the problems with the related art can be resolved.

Abstract: A liquid crystal display includes: a display with an array substrate having scanning and data lines and an IC chip driving liquid crystal, and a color filter substrate; a light-detector having an optical sensor integrated in the display detecting external light; a detection circuit connected via sensor laid-around lines connecting to light-detector lines; an illuminator illuminating the display panel; and a controller controlling the illuminator based on the detection circuit's output. The data lines are distributed to the chip-mounting area and have terminals at an end for connecting to IC chip bump terminals. Leader lines distribute from the terminals toward the chip-mounting area and have inspection terminals at their ends. Sensor inspection lines connect at one end to the sensor laid-around lines and extend at the other end to the chip-mounting area. Sensor detection terminals are formed at the other end of the sensor inspection lines.

Abstract: Provided is a liquid crystal display device including: a liquid crystal display panel; a light detector which is mounted on the liquid crystal display panel and has a plurality of TFT ambient light photo-sensors composed of thin-film transistors (TFTs) for detecting external light; an illumination unit which illuminates light on the liquid crystal display panel; a detection circuit connected to the light detector; and a control unit which controls the brightness of the illumination unit on the basis of the output of the detection circuit, wherein the plurality of TFT ambient light photo-sensors include first and second TFT ambient light photo-sensors for detecting lights of different systems, and, among source wires or drain wires of the first TFT ambient light photo-sensors and the second TFT ambient light photo-sensors, wires which are not connected to the detection circuit are formed by a single wire.

Abstract: The invention provides a display unit that has a display area and first and second photodetectors 10a and 10b on a substrate and outputs as a light intensity signal S a light intensity detected by the first and second photodetectors 10a and 10b. The first photodetector 10a includes a first photodetection circuit LS1 outputting a first output signal Sa to an ambient light photosensor reader 20, and the second photodetector 10b includes a light-reducing unit and a second photodetection circuit LS2 outputting a second output signal Sb to an ambient light photosensor reader 20. The ambient light photosensor reader 20 includes a photodegradation factor calculator 21 calculating a photodegradation reparation factor K, a photodegradation rate calculator 22 deriving a photodegradation rate D based on the photodegradation reparation factor K, and a light signal output unit 24 outputting a light intensity signal S based on the photodegradation rate D.

Abstract: A sensing circuit includes a first sensing element, a second sensing element, a reduction unit, a storage unit, a specifying unit and a detection unit. The reduction unit reduces the amount of the energy applied to the second sensing element. The storage unit stores a degradation characteristic of the sensing element. The specifying unit specifies a rate of degradation. The detection unit detects the amount of the energy on the basis of the rate of degradation.

Abstract: A liquid crystal display according to an embodiment of the present invention includes a liquid crystal display panel, an illumination unit for the liquid crystal display panel, a plurality of photodetectors, and a control unit Cnt to control the brightness of the illumination unit. The photodetectors are TFT ambient light photosensors LS1 to LS3, for example, which produce outputs that require time to reach a predetermined value, which the time is correlated with the intensity of ambient light. Detection circuits coupled to the photodetectors include circuits (Cmp1 to Cmp3) logically inverted when an output from the TFT ambient light photosensors LS1 to LS3 reaches a predetermined value. The control unit Cnt includes a discrimination implement Maj that determines that the intensity of ambient light has changed when outputs from the majority of the detection circuits are logically inverted.

Abstract: A display device according to an embodiment of the invention includes a display panel, a drive circuit that drives the display panel, an illuminating unit that illuminates the display panel, a photosensing section Ls having an ambient light photosensor Ts that senses the brightness of ambient light and a capacitor Cw that is charged with a predetermined reference voltage via a first switch S1, an ambient light photosensor reading section Re1 that reads a value sensed by the photosensing section, and a controller that controls the illuminating unit according to an output of the ambient light photosensor reading section. The ambient light photosensor reading section is provided with a noise avoidance unit that avoids erroneous sensing in the photosensing section induced as a result of noise generated when the drive circuit operates.

Abstract: With the related art, the choice of locations for disposition of ambient light photosensors is narrow, and consequently it is difficult to respond flexibly to user specifications for differing structures of the case. With a display device of the invention however, ambient light photosensors can be disposed laterally and longitudinally, enabling the intensity of light in longitudinal or lateral directions to be sensed at the same levels. Also, bridge-connecting together the longitudinally-disposed ambient light photosensors enables ambient light photosensors to be disposed close to the outer periphery of the display area in both the longitudinal and lateral directions. Thereby, the problems with the related art can be resolved.

Abstract: A liquid crystal display device 1 according to an embodiment of the present invention includes a liquid crystal display panel, a photodetector unit LS1 that is built into the liquid crystal display panel and has a TFT ambient light photosensor, an ambient light photosensor reader Re1 for reading a voltage due to photo-leakage from the TFT ambient light photosensor, and a control means 20 for controlling the photodetector unit and the ambient light photosensor reader, and a backlight 24, etc., according to an output from the ambient light photosensor reader. The photodetector unit has a switching element SW2 coupled between a source line coupled to the TFT ambient light photosensor's source electrode SL and a drain line coupled to the TFT ambient light photosensor's drain electrode DL.

Abstract: A liquid crystal display device of the invention has: a display panel with an active matrix substrate 2 and a second substrate of transparent material deposed opposite that substrate; an illuminating unit that illuminates the display panel; and a photosensing unit that is provided on the active matrix substrate and has an ambient light photosensor that senses external light. The ambient light photosensor is constituted of a thin film transistor. At least the source electrode SL and drain electrode DL of the thin film transistor are covered by a shielding transparent electrode 6, with transparent insulator 3 and 5 interposed. The transparent electrode 6 is electrically connected to the drain electrode DL, and moreover is connected to a power source supplying constant voltage. Thanks to such structure, a display device is provided in which the ambient light photosensor is built into a panel substrate so as not to be affected by external noise and the peripheral circuits.

Abstract: A liquid crystal display (LCD) 1 according to an embodiment of the present invention includes a liquid crystal panel having a TFT substrate 2, a CF substrate 25, and a liquid crystal layer 14 interposed between the two substrates; a TFT ambient light photosensor having a semiconductor layer 19L for detecting external light; a photodetector unit LS1 having a capacitor Cw in which a predetermined reference voltage is charged and a voltage charged by leakage current of the TFT ambient light photosensor is lowered; and an ambient light photosensor reader unit Re1 for reading a voltage charged in the capacitor for a predetermined read period. The photodetector unit is disposed on a first surface of the TFT substrate 2 that is in contact with the liquid crystal layer, and the surface of the photodetector unit except for the semiconductor layer 19L and its periphery is covered by a light-shielding layer 21.

Abstract: A display 10 according to one embodiment of the invention includes a display panel having an active matrix substrate and a color filter substrate, a lighting unit for the display panel, ambient light photosensors 321 to 326, a controller that controls luminous intensity of the lighting unit based on outputs from the ambient light photosensors 321 to 326, and a spectral sensitivity adjustor provided at a position on the color filter substrate corresponding to the ambient light photosensors 321 to 326 in order to make the spectral sensitivity of the ambient light photosensors 321 to 326 match human visual sensitivity. The spectral sensitivity adjustor may be a color filter or a polarizing filter. The display thus structured automatically and stably controls on/off of its backlights depending on the brightness of the surroundings with a sensitivity corresponding to human visual sensitivity.

Abstract: A liquid crystal display device 1 of the invention has a liquid crystal display panel in which a liquid crystal layer 14 is provided between a TFT substrate 2 and a CF substrate 25 that has a common electrode 26, a light sensing component LS1 with a TFT photosensor that senses external light, and an illuminating means controlled according to the output of the light sensing component. The light sensing component is deployed at the periphery of the TFT substrate's display area DA and uses a thin film transistor as photosensor. A capacitor C is connected between source and drain electrodes SL, DL for such TFT photosensor. One of the capacitor's terminals is connected to a standard voltage source VS via a switch element SW, and the other to the common electrode 26. Voltage that is always lower than the voltage applied to the common electrode by an amount corresponding to a reverse bias voltage is applied to the gate electrode GL for the TFT photosensor.

Abstract: A liquid crystal panel drive device performs overdrive by using a frame memory (1) and a lookup table (2). The device is characterized by that there are provided a plurality of types of lookup table (2) to be used according to temperature and the lookup tables (2) are selectively switched from one to another according to the information indicating the ambient temperature. The device is configured so as to have a hysteretic characteristic when the tables are switched from one to another according to the temperature information.