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Touch display control device and touch display device

A touch display and control device technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., can solve the problems of voltage influence, influence on picture display quality, etc., to achieve consistent driving ability, large current, The effect of fast pull-up or pull-down speed

Pending Publication Date: 2019-08-23
CHIPONE TECH BEIJINGCO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of lead resistance R and switch resistance R' will affect the voltage at node Q
When the node Q is connected to the common voltage VCOM during the display stage, the voltages at the various nodes Q1, Q2, ..., Qn are inconsistent, and in some extreme cases, it may even lead to failure to reach the desired common voltage VCOM within a limited charging time. As a result, there are horizontal or vertical lines on the display screen, which affects the display quality of the screen.

Method used

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  • Touch display control device and touch display device
  • Touch display control device and touch display device
  • Touch display control device and touch display device

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Embodiment Construction

[0031] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the following, many specific details of the present invention, such as structures, materials, dimensions, processes and techniques of components, are described for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0033] It should be understood that when describing the structure of a component, when a layer or ...

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Abstract

The embodiment of the invention discloses a touch display control device and a touch display device, and the touch display control device comprises a touch module which is used for carrying out touchdetection; a display control module which is used for performing display control; a common voltage input module which is used for providing a common voltage signal to a plurality of common voltage input nodes; and a selection module which is used for achieving display control and touch detection in a time-sharing mode. The touch display control device further comprises a compensation module connected between the selection module and the common voltage input nodes, the compensation module generates compensation control signals according to reference voltage and the node voltage, and the compensation control signals are used for gating a charging path or a discharging path connected with the public voltage input nodes. According to the embodiment of the invention, the voltage fluctuation atthe connection point between the touch display device and the touch display panel can be compensated, and the adjustment time is short, so that the occurrence of transverse lines or vertical lines ona display picture is avoided.

Description

technical field [0001] The present invention relates to the technical field of touch display, in particular to a touch display control device and a touch display device. Background technique [0002] Touch and Display Driver Integration (TDDI, Touch and Display Driver Integration) is a technology that integrates a touch chip and a display chip into a single chip, and has been more and more widely used in current touch displays. [0003] For a touch display device with integrated touch and display driver, the common voltage VCOM and the touch sensing channel share a node, and the display drive and touch detection are performed in time-sharing, and the touch lines of the touch display device must be connected during the display stage The common voltage VCOM will make it difficult to maintain the common voltage VCOM within an ideal voltage range, thereby affecting the display quality of the picture. [0004] figure 1 It shows an equivalent circuit diagram of the connection be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0412G06F3/0416G06F3/044
Inventor 谢友侨
Owner CHIPONE TECH BEIJINGCO LTD
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