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Touch drive circuit, drive chip and touch display device

A technology of touch drive circuit and touch electrode, which is applied in the direction of electrical digital data processing, instrumentation, data processing input/output process, etc., and can solve problems such as difficulty in meeting low-power touch detection and increased power consumption of OLED screens

Active Publication Date: 2021-06-11
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared to LCD screens, the load capacitance of OLED screens (equivalent capacitance C L ) The capacitance value is significantly larger, which in turn leads to an increase in power consumption of the OLED screen, making it difficult to meet the needs of low-power touch detection

Method used

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  • Touch drive circuit, drive chip and touch display device
  • Touch drive circuit, drive chip and touch display device
  • Touch drive circuit, drive chip and touch display device

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present application, but not all of the embodiments.

[0032] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] In addition, terms such as "first" and "second" are only used to distinguish similar objects, and cannot be understood as indicating or implying relative importance, or implicitly...

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Abstract

The invention provides a touch drive circuit, a drive chip and a touch display device. The touch drive circuit is used for outputting a driving signal to drive a touch electrode of the touch display device. The touch drive circuit comprises a power supply voltage generating circuit, a switching circuit and a first energy storage capacitor, the first input end of the switching circuit is connected to the power supply voltage generating circuit; a second input end of the switching circuit is connected to a ground end GND through a first energy storage capacitor; a third input end of the switching circuit is connected to a ground end GND; the output end of the switching circuit is connected to the touch electrode; the power voltage generation circuit is used for generating first positive voltage; and the switching circuit is used for controlling the touch electrode to be connected to the power supply voltage generating circuit in a first time period, controlling the touch electrode to be connected to the first energy storage capacitor in a second time period and controlling the touch electrode to be connected to a ground end GND in a third time period. The touch drive circuit has relatively low driving power consumption.

Description

technical field [0001] The embodiments of the present application relate to the technical field of electronic circuits, and in particular to a touch driving circuit, a driving chip, and a touch display device. Background technique [0002] A capacitive touch display device generally includes a display, a touch electrode, and a touch driving circuit. The touch drive circuit is used to charge and discharge the touch electrodes, and when a human body or other conductor touches the display, the capacitance change at the corresponding coordinate position of the display can be detected, thereby determining the user's operation. [0003] Such as figure 1 Shown is a schematic structural diagram of a traditional touch driving circuit. The touch driving circuit utilizes the inverter INV to provide a driving signal to drive the touch electrodes. where the voltage V DD is the supply voltage, the capacitor C L Indicates the equivalent capacitance of the touch electrode, resistance R...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0412G06F3/044G06F3/0416
Inventor 黄龙孔晨阳
Owner SHENZHEN GOODIX TECH CO LTD
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