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Display device with optical input function

A display device and light input technology, applied in static indicators, optics, instruments, etc., can solve problems such as difficult writing feeling

Inactive Publication Date: 2009-04-08
JAPAN DISPLAY CENTRAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to achieve a smooth writing feeling with this method

Method used

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  • Display device with optical input function
  • Display device with optical input function
  • Display device with optical input function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The invention will now be described with reference to the accompanying drawings.

[0049] In one embodiment of the present invention, the coarsely divided features are interpreted in the order in which pixel data is read out from the sensor circuit.

[0050] (1) Obtaining a circuit capable of compensating for a portion that is partially lost due to the presence of point-like defects or line-like defects in an LCD.

[0051] (2) In this case, an increase in the circuit scale of the external integrated circuit (signal processing section) and an increase in circuit cost are suppressed.

[0052] (3) Obtain a display device with a light input function with a high manufacturing yield.

[0053] (4) Obtaining a display device with a light input function capable of correctly determining the contact / non-contact state without fixing a switch for determining the contact / non-contact state to the light source.

[0054] figure 1 Shown is an array substrate 100 of a display device 10...

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PUM

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Abstract

A display device includes a plurality of scanning lines, a plurality of signal lines, a plurality of pixel circuits and sensor circuits arranged between the intersect part of the plurality of scanning lines and the plurality of signal lines, a signal line drive circuit and scanning line drive circuit which drive the plurality of pixel circuits, and a precharge circuit and sensor control circuit which drive the sensor circuits. A filter subjects image data to an interpolation process to compensate for a gradation value of an output. In a signal processing section, the area of a light receiving area is calculated and it is determined that a light source is set in contact with a display screen when the deviation value of the light receiving area to the basis area is small enough, the light receiving area accompanied with the time is small enough, or the roundness of the light receiving area is big enough.

Description

(1) Technical field [0001] The present invention relates to a display device with a light input function for inputting information by illuminating a display screen with light from a light source such as a light pen. The display device detects illuminated position information or contact position information on a light-illuminated display screen. More specifically, the present invention will be clarified by explaining the embodiments described below. (2) Background technology [0002] Recently, liquid crystal display devices are widely used as display devices of various devices, such as mobile phones or notebook personal computers. The liquid crystal display device is configured with an array substrate - liquid crystal pixels including thin film transistors (TFTs), liquid crystal capacitors and auxiliary capacitors are arranged at the intersections between a plurality of scanning lines and a plurality of signal lines on the substrate part, and a driver circuit that drives th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13G09G3/00G09F9/00
Inventor 吉田征弘中村卓永冈一孝
Owner JAPAN DISPLAY CENTRAL CO LTD