Liquid crystal display device and fabricating method and driving method thereof
First Claim
1. A liquid crystal display device comprising:
- a plurality of photo sensing devices formed on a TFT array substrate that sense an external light irradiated into a liquid crystal display panel, wherein the liquid crystal panel has a plurality of unit areas divided in a matrix form;
a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixel areas;
a gate driver that sequentially provides a scan signal to the plurality of gate lines to select horizontal lines of the liquid crystal display device supplied with data signals;
a first thin film transistor connected to the nth gate line and one of the data lines;
an integrated circuit portion that reads out sensing signals corresponding to an illumination distribution by the external light in accordance with a sensing result by each of the photo sensing devices;
a backlight having a plurality of light sources that independently supply light to the liquid crystal display panel in accordance with the illumination distribution of the plurality of unit areas; and
a backlight driver that drives the backlight,wherein the photo sensing device includes a sensor thin film transistor that senses an external light, a first driving voltage supply line that supplies a first driving voltage to the sensor thin film transistor, a second driving voltage supply line that supplies a second driving voltage to the sensor thin film transistor and a second storage capacitor that stores a signal voltage sensed by the sensor thin film transistor,wherein the photo sensing device further includes a second thin film transistor connected to the n−
1th gate line and a read-out line and supplying the sensing signal to the integrated circuit portion through the read-out line,wherein the scan signal is sequentially supplied to the second thin film transistor through the n−
1th gate line and the first thin film transistor through the nth gate line from the gate driver,wherein the n−
1th gate line and the nth gate line are commonly connected to the gate driver,wherein each of the light sources is arranged in the matrix form corresponding to each of the unit areas.
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Accused Products
Abstract
Disclosed is a liquid crystal display device, a fabricating method, and a driving method thereof that includes at least one integrated photosensor that senses external light illumination on the liquid crystal display device. A sensing signal from the at least one photosensors are converted into a digital signal that is stored to represent an external illumination distribution. The liquid crystal display device includes a backlight that has a plurality of light sources that may be independently driven. A controller generates a control signal that independently drives the light sources in a manner corresponding to the illumination distribution. In doing so, areas of the liquid crystal display device may be provided with a greater amount of light from a corresponding light source so that externally illuminated areas of the liquid crystal display device do not suffer from reduced contrast.
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Citations
12 Claims
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1. A liquid crystal display device comprising:
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a plurality of photo sensing devices formed on a TFT array substrate that sense an external light irradiated into a liquid crystal display panel, wherein the liquid crystal panel has a plurality of unit areas divided in a matrix form; a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixel areas; a gate driver that sequentially provides a scan signal to the plurality of gate lines to select horizontal lines of the liquid crystal display device supplied with data signals; a first thin film transistor connected to the nth gate line and one of the data lines; an integrated circuit portion that reads out sensing signals corresponding to an illumination distribution by the external light in accordance with a sensing result by each of the photo sensing devices; a backlight having a plurality of light sources that independently supply light to the liquid crystal display panel in accordance with the illumination distribution of the plurality of unit areas; and a backlight driver that drives the backlight, wherein the photo sensing device includes a sensor thin film transistor that senses an external light, a first driving voltage supply line that supplies a first driving voltage to the sensor thin film transistor, a second driving voltage supply line that supplies a second driving voltage to the sensor thin film transistor and a second storage capacitor that stores a signal voltage sensed by the sensor thin film transistor, wherein the photo sensing device further includes a second thin film transistor connected to the n−
1th gate line and a read-out line and supplying the sensing signal to the integrated circuit portion through the read-out line,wherein the scan signal is sequentially supplied to the second thin film transistor through the n−
1th gate line and the first thin film transistor through the nth gate line from the gate driver,wherein the n−
1th gate line and the nth gate line are commonly connected to the gate driver,wherein each of the light sources is arranged in the matrix form corresponding to each of the unit areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of driving a liquid crystal display device including a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixel areas and a first thin film transistor connected to the nth gate line and one of the data lines, comprising:
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sensing an external light irradiated onto a liquid crystal display panel using a photo sensing device provided within the liquid crystal display device, wherein the liquid crystal panel has a plurality of unit areas divided in a matrix form; measuring an illumination distribution corresponding to the external light in accordance with a result of the sensing by the photo sensing device; and adjusting a light amount supplied to the liquid crystal display panel in accordance with the illumination distribution of the plurality of unit areas, wherein the photo sensing device includes a sensor thin film transistor that senses an external light, a first driving voltage supply line that supplies a first driving voltage to the sensor thin film transistor, a second driving voltage supply line that supplies a second driving voltage to the sensor thin film transistor and a second storage capacitor that stores a signal voltage sensed by the sensor thin film transistor, wherein the photo sensing device further includes a second thin film transistor connected to the n−
1th gate line and a read-out line and supplying a sensing signal to a read-out circuit,wherein a scan signal is sequentially supplied to the second thin film transistor through the n−
1th gate line and the first thin film transistor through the nth gate line from a gate driver,wherein the gate driver sequentially provides a scan signal to the plurality of gate lines to select horizontal lines of the liquid crystal display device supplied with data signals, wherein the n−
1th gate line and the nth gate line are commonly connected to the gate driver,wherein the light amount is emitted from each of light sources corresponding to each of the unit areas. - View Dependent Claims (11, 12)
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Specification