Capacitance type in cell touch panel and display device

A touch screen, capacitive technology, applied in the direction of electrical digital data processing, instruments, data processing input/output process, etc., can solve the problems of increased production cost, new process, high cost, etc., to save production cost, save production cost, productivity improvement effect

Active Publication Date: 2013-06-12
HEFEI BOE OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the structural design of the above-mentioned capacitive embedded touch screen, it is generally necessary to separately arrange corresponding touch reading signal lines for each touch sensing electrode in the TFT array substrate, and separately arrange corresponding touch scanning signal lines for each touch driving electrode. , thus leading to the addition of new processes in the production process, which increases production costs and is not conducive to improving production efficiency
Moreover, the structural design of the above-mentioned capacitive embedded touch screen needs to use two driver chips (IC) to control the touch reading signal line and the normal display signal line (such as data signal line, etc.) at the same time, and the cost is relatively high.

Method used

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  • Capacitance type in cell touch panel and display device
  • Capacitance type in cell touch panel and display device
  • Capacitance type in cell touch panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Specifically, at least one gate signal line Gate in the array substrate can be used as the touch scanning signal line 04 during the touch period; correspondingly, the signal switching unit 03 can be a P-type TFT device; Figure 4 As shown, the source of the TFT device is electrically connected to the touch reading signal line 02 , the drain is electrically connected to the touch sensing electrode Rx, and the gate is electrically connected to the touch scanning signal line 04 . The TFT devices connected to the data signal lines Data and the pixel electrodes in the array substrate are generally N-type TFT devices. The N-type TFT device is turned on when the gate signal line connected to it is loaded with a high-level signal (a positive voltage signal), and the P-type TFT device is turned on when the gate signal line connected to it as the touch scanning signal line is loaded with a low voltage. P-type TFT devices and N-type TFT devices are generally not turned on when the...

Embodiment 2

[0049] Such as image 3 As shown, a plurality of touch scanning signal lines 04 located between adjacent pixel units in the TFT array substrate are added to the TFT array substrate;

[0050] Specifically, the signal switching unit 03 is a TFT device, which may be a P-type TFT device or an N-type TFT device, which is not limited here; wherein, the source of the TFT device is electrically connected to the touch reading signal line 02 , the drain is electrically connected to the touch sensing electrode Rx, and the gate is electrically connected to the newly added touch scanning signal line 04 . The conduction of the signal switching unit 03 is independently controlled by the added touch scanning signal line 04, that is, when the signal switching unit 03 is a P-type TFT device, the signal switching unit is turned on when the touch scanning signal line 04 is loaded with a low-level signal ; When the signal switching unit 03 is an N-type TFT device, the signal switching unit 03 is ...

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Abstract

The invention discloses a capacitance type in cell touch panel and a display device, and adopts the scheme that a whole-surface public electrode layer in an array substrate is divided to form touch inducting electrodes and touch driving electrodes which are insulated with one another; at least a data signal line is subjected to time-sharing multiplexing to serve as a touch reading signal line, so that production cost is saved, and production efficiency is improved; each of touch reading signal lines is connected with a corresponding touch inducting electrode through at least one signal changeover unit; at a display time period, public electrode signals are applied to the touch driving electrodes and touch inducting electrodes so as to achieve a normal display function; at a touch time period, touch scanning signals are applied to the touch driving electrodes, a signal changeover unit is turned on, and the touch scanning signals coupled by the touch inducting electrodes are output to the touch reading signal lines through the turned-on signal changeover unit.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a capacitive embedded touch screen and a display device. Background technique [0002] With the rapid development of display technology, touch screen panels (Touch Screen Panels) have gradually spread throughout people's lives. At present, touch screens can be divided into three types according to their structure: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel. Among them, the plug-in touch screen is produced separately from the touch screen and Liquid Crystal Display (LCD), and then bonded together to form a touch-enabled LCD screen. The plug-in touch screen has high production costs and low light transmittance. Low, thick modules and other shortcomings. The embedded touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module and greatly reduce the production cost o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/0412G06F3/04166G06F3/0443G06F3/0446G06F2203/04112
Inventor 木素真胡明
Owner HEFEI BOE OPTOELECTRONICS TECH
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