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Drive circuit and method of touch display screen, display screen including drive circuit and display

A technology of touch display and driving circuit, applied in the field of display and display, driving circuit of touch display, can solve the problem that TPIC and FPC have not yet started to communicate, and achieve the effect of preventing polarization and prolonging service life

Active Publication Date: 2015-09-23
XIAMEN TIANMA MICRO ELECTRONICS +1
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  • Description
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AI Technical Summary

Problems solved by technology

[0014] However, in some abnormal cases, when the communication between DDIC and TPIC is abnormal, or the communication between TPIC and FPC has not started, or the firmware for storing program codes has not been burned in TPIC, the external scan drive signal EXVCOM1 may always high level

Method used

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  • Drive circuit and method of touch display screen, display screen including drive circuit and display
  • Drive circuit and method of touch display screen, display screen including drive circuit and display
  • Drive circuit and method of touch display screen, display screen including drive circuit and display

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Embodiment Construction

[0041] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0042] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0043] Image 6 A schematic structural diagram 600 of a driving circuit of a touch display screen according to a first embodiment of the present application is shown. The driving circuit of this embodiment can be used to perform display driving and touch driving alternately in one frame period.

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Abstract

The invention discloses a drive circuit and method of a touch display screen, the display screen including the drive circuit and a display. The drive circuit of the touch display screen comprises a scanning unit, a gate output unit and a control unit. The scanning unit is used for outputting a gate control signal, the gate output unit is used for scanning drive electrodes of the touch display screen step by step according to the gate control signal output by the scanning unit, and the control unit is used for controlling the output level of the gate output unit to make the output level be equal to a common level during the display driver period. According to the scheme, normal display of the touch display screen can be guaranteed, display abnormity caused by communication abnormity between a touch chip and a display driver chip is prevented, and the service life of the touch display screen is prolonged.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to touch display technology, in particular to a driving circuit and method for a touch display screen, a display screen and a display including the same. Background technique [0002] In the prior art, the driving circuit of the touch display screen usually adopts a two-chip solution, that is, includes a display driver chip (DDIC) and a touch control chip (TPIC). During implementation, two flexible printed circuit boards (Flexible Printed Circuit, FPC) are usually required, which are usually referred to as TP FPC and main FPC respectively. The TP FPC connects the sensing electrode RX to the TPIC, and at the same time realizes the communication between the TPIC, DDIC and the host through the connector. [0003] figure 1 It is a driving circuit 100 for driving electrodes TX of an existing touch screen, including a scanning unit 10 and a gate output unit 20 . [0004] The s...

Claims

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Application Information

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IPC IPC(8): G06F3/041
Inventor 罗斯建赖青俊潘朝煌
Owner XIAMEN TIANMA MICRO ELECTRONICS
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