# US 7,609,360 B2 · Image display device

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- Number: US 7,609,360 B2
- Document ID: US7609360B2
- Status: Granted
- Kind: B2
- Application number: 10/462,674
- Filed: 2003-06-17
- Published: 2003-12-18
- Granted: 2009-10-27
- Earliest claimed: 2002-06-17
- Assignees: FUJIFILM Corporation
- Inventors: Akira Yamaguchi
- Web page: https://patentgrep.com/patent/US7609360B2

## CPC

- G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)}
- G02F 1/13318: {Circuits comprising a photodetector}
- G02F 1/1362: Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)}
- G09G 3/342: {using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines}
- G09G 2320/0285: using tables for spatial correction of display data
- G09G 2320/0626: for control of overall brightness
- G09G 2320/0633: by amplitude modulation of the brightness of the illumination source
- G09G 2320/0693: Calibration of display systems
- G09G 2360/144: the light being ambient light
- G09G 2360/145: the light originating from the display screen
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

The image display device includes a liquid crystal panel which has at least one optical sensor for outputting an electric signal resulting from light irradiation, pixel electrodes for driving a liquid crystal, switching elements for switching the pixel electrodes and a single transparent substrate on which the at least one optical sensor, the pixel electrodes and the switching elements are formed by laminating thin films.

## Claims

### Claim 1

An image display device which includes a liquid crystal panel, said liquid crystal panel comprising:
at least one optical sensor for outputting an electric signal resulting from light irradiation;
pixel electrodes for driving a liquid crystal;
switching elements for switching the pixel electrodes; and
a single transparent substrate on which said at least one optical sensor, said pixel electrodes and said switching elements are formed by laminating thin films,
wherein said at least one optical sensor is disposed at a front side of the single transparent substrate,
wherein said at least one optical sensor comprises a first optical sensor which receives and detects light which comes from a backlight located at a rear side of the single transparent substrate, the received light being transmitted without reflection through the single transparent substrate from the rear side to the front side of the single transparent substrate to be incident without reflection on said first optical sensor, and
wherein said at least one optical sensor further comprises a second optical sensor which receives and detects exterior light being incident from a front side of said liquid crystal panel on said second optical sensor.

### Claim 2 (depends on 1)

The image display device according to claim 1, wherein said first optical sensor and said second optical sensor are composed of a single optical sensor.

### Claim 3

An image display device comprising:
a backlight; and
a liquid crystal panel, said liquid crystal panel comprising:
at least one optical sensor;
pixel electrodes for driving a liquid crystal;
switching elements for switching the pixel electrodes; and
a single transparent substrate on which said at least the one optical sensor, said
pixel electrodes and said switching elements are formed by laminating thin films,
wherein said backlight is located at a rear side of the single transparent substrate,
wherein said at least one optical sensor is disposed at a front side of the single transparent substrate,
wherein said at least one optical sensor comprises a first optical sensor which receives and detects light which comes from the backlight, the received light traveling without reflection through the single transparent substrate from the rear side to the front side of the single transparent substrate to be incident without reflection from the rear side on said first optical sensor, and
wherein said at least one optical sensor further comprises a second optical sensor which receives and detects exterior light being incident from a front side of said liquid crystal panel on said second optical sensor.

### Claim 4 (depends on 3)

The image display device according to claim 3, wherein said first optical sensor and said second optical sensor are composed of a single optical sensor.