Liquid crystal display device

Abstract

The present invention provides a liquid crystal display device, which has a built-in touch panel function, and can perform cross-capacitance calibration efficiently. A liquid crystal display device has a plurality of pixels arranged in a matrix, and includes: a first substrate; a second substrate; liquid crystal sandwiched between the first substrate and the second substrate; and a detection circuit. The second substrate has detection electrodes of the touch panel, and each of the pixels has a pixel electrode and an opposite electrode, and the opposite electrode is divided into a plurality of blocks, and the opposite electrodes of each of the divided blocks are arranged to be opposite to each other. Each pixel of a plurality of continuous display lines is provided in a common manner, and the opposing electrode of each divided block is also used as a scanning electrode of the touch panel. The detection circuit has a calibration capacitive element provided corresponding to each of the detection electrodes, one end of which is connected to each of the detection electrodes, and is connected to the other end of each of the calibration capacitive elements during touch position detection processing. Supply calibration voltage.

Description

technical field [0001] The present invention relates to a liquid crystal display device, and particularly relates to an effective technology applied to an in-cell liquid crystal display device incorporating a touch panel. Background technique [0002] A display device with a device (hereinafter also referred to as a touch sensor or touch panel) for inputting information by touching the display screen with a user's finger or a pen (contact pressing operation, hereinafter referred to as touch) is used for PDA or mobile Mobile electronic devices such as terminals, various home appliances, automated teller machines, etc. [0003] As such a touch panel, there is known a capacitive method that detects a change in capacitance of a touched portion. [0004] As such a capacitive touch panel, a so-called in-cell liquid crystal display device is known in which a touch panel function is incorporated in a liquid crystal display panel. [0005] In an all-in-one liquid crystal display de...

AI Technical Summary

Problems solved by technology

[0012] The detection of adjacent short-circuit faults between two detection electrodes adjacent to each other can be carried out by dot inspection for each intersection point of the scanning electrode and the detection electrode, but since the inspection takes time, the production efficiency is significantly reduced

In addition, the method of setting test points for the wiring connected to the detection electrode on the flexible wiring substrate to perform the open-short circuit test has disadvantages such as weak anti-noise and static electricity, or the flexible wiring substrate becomes larger.

Images