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A touch display device and a driving method thereof

A technology of a touch display device and a driving method, which is applied in the directions of instruments, calculations, and electrical digital data processing, etc., and can solve problems such as large assembly tolerances and detection accuracy limitations, and achieve production cost savings, small structural design changes, and good detection The effect of precision

Active Publication Date: 2018-12-25
BOE TECH GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

At present, the way to achieve pressure sensing in the display field, especially in the field of mobile phones or tablets, is to add an additional mechanism to the backlight part of the LCD panel or the middle frame of the mobile phone. This design requires structural design of the LCD panel or mobile phone. changes, and the probing accuracy of this design is limited due to large assembly tolerances

Method used

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  • A touch display device and a driving method thereof
  • A touch display device and a driving method thereof
  • A touch display device and a driving method thereof

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Embodiment Construction

[0039] The specific implementation manners of the touch display device and its driving method provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] The thickness and shape of each film layer in the drawings do not reflect the real scale, and the purpose is only to illustrate the content of the present invention.

[0041] In a liquid crystal display device, using a colored electroluminescent display panel to replace the traditional form of backlight can make the entire display device thinner, and can save the color filter in the liquid crystal display panel, which is conducive to improving the performance of the liquid crystal display panel. optical transmittance. The touch display device and its driving method provided by the embodiments of the present invention are based on the structure of the display device using the color electroluminescence display panel as the backlight of the liquid c...

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Abstract

A touch display device and a driving method are disclosed. The touch display device includes a liquid crystal display panel having a plurality of self-capacitive electrodes and an electroluminescent display panel arranged under the liquid crystal display panel. The self-capacitive electrodes in the liquid crystal display panel and a cathode in the electroluminescent display panel constitute capacitive structures. The driving method includes in a touch detection time period, applying a first touch detection signal to the self-capacitive electrodes and the cathode simultaneously, and detecting change of a capacitance value of a self capacitance corresponding to each self-capacitive electrode so as to determine a touch position; and in a pressure detection time period, applying a second touch detection signal to the self-capacitive electrodes or the cathode, and detecting changes of capacitance values of capacitances formed between the self-capacitive electrodes and the cathode to determine a pressure at the touch position.

Description

technical field [0001] The present invention relates to the technical field of touch display, in particular to a touch display device and a driving method thereof. Background technique [0002] Pressure sensing technology refers to the technology that can detect external force. This technology has been used in industrial control, medical and other fields a long time ago. At present, the way to achieve pressure sensing in the display field, especially in the field of mobile phones or tablets, is to add an additional mechanism to the backlight part of the LCD panel or the middle frame of the mobile phone. This design requires structural design of the LCD panel or mobile phone. changes, and the probing accuracy of this design is limited due to large assembly tolerances. [0003] Therefore, how to realize the pressure sensing with high detection accuracy with little modification of the display panel hardware is an urgent problem to be solved by those skilled in the art. Conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F3/0412G06F3/0445
Inventor 王海生董学薛海林陈小川杨盛际丁小梁刘英明赵卫杰李昌峰刘伟王鹏鹏许睿
Owner BOE TECH GRP CO LTD
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