DISPLAY DEVICE

• US 20120013650A1
• Filed: 06/11/2010
• Published: 01/19/2012
• Est. Priority Date: 06/19/2009
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Mizubuchi, Naoki
• Application Number:
  US13/138,751
• Publication Number:
  US 20120013650A1
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2360/141 the light conveying information used for selecting or modulating the light emitting or modulating element
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display device with a simple structure is provided where the number of electrical lines connected to the active matrix substrate can be reduced even when the number of pixels in the display module is increased. A liquid crystal display device includes a superimposing circuit (superimposing module) that superimposes a lighting signal for a light-emitting diode (light source) on a drive signal for a data line drive circuit (drive circuit) and a scan line drive circuit (drive circuit) to generate a superimposed signal. On the active matrix substrate are provided a photosensor unit (light-electricity transducer) that receives light from the light-emitting diode and outputs an electrical signal corresponding to the received light, and a decoding circuit (decoding module) that decodes the electrical signal from the photosensor unit to the drive signal for the data line drive circuit and the scan line drive circuit.

Claims

1. A display device comprising:

a backlight module having a light source;

a display module having an active matrix substrate with a plurality of pixels for displaying information using illumination light generated by the backlight module;

a backlight control module that outputs a lighting signal for drive-controlling the backlight module; and

a display control module that outputs a drive signal for drive-controlling the display module,

wherein on the active matrix substrate are provided;

a drive circuit that drives the plurality of pixels on a pixel-by-pixel basis;

a superimposing module that superimposes the drive signal output from the display control module on the lighting signal output from the backlight control module to generate a superimposed signal and output the superimposed signal to the backlight module;

a light-electricity transducer that receives light from the light source and outputs an electrical signal corresponding to the received light; and

a decoding module that decodes the electrical signal from the light-electricity transducer to the drive signal and outputs it to the drive circuit.

2. The display device according to claim 1, wherein the light-electricity transducer is a photosensor unit.

3. The display device according to claim 1, wherein the light-electricity transducer is a solar cell unit, and

the solar cell unit is configured to obtain electrical power from the received light, in addition to the electrical signal, and supply the electrical power to the drive circuit and the decoding module.

4. The display device according to claim 1, wherein the drive signal contains a clock signal and a data signal corresponding to a video signal from an outside.

5. The display device according to claim 1, wherein the display module includes a liquid crystal panel, and

on the active matrix substrate are provided a plurality of data lines and a plurality of scan lines arranged in a matrix and switching devices near intersections between the data lines and the scan lines, and

the drive circuit contains a data line drive circuit connected to the data lines and a scan line drive circuit connected to the scan lines.