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Flexible printed circuit, preparation method of flexible printed circuit, and capacitive touch display device

A flexible circuit board, flexible circuit technology, applied in the direction of circuit devices, flexible printed circuit boards, printed circuit manufacturing, etc., can solve the problems of limited VCOM filtering effect, and achieve the effect of reducing signal drift and noise interference

Active Publication Date: 2014-11-05
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even due to the limitation of FPC space, no filtering process is performed. Since the frequency bands of VCOM noise received by the capacitive touch screen are many, this processing method has a limited filtering effect on VCOM noise.

Method used

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  • Flexible printed circuit, preparation method of flexible printed circuit, and capacitive touch display device
  • Flexible printed circuit, preparation method of flexible printed circuit, and capacitive touch display device
  • Flexible printed circuit, preparation method of flexible printed circuit, and capacitive touch display device

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Embodiment Construction

[0032] The flexible circuit board described in the embodiment of the present invention is applied to a capacitive touch display device, including a flexible circuit board substrate; figure 1 As shown, the flexible circuit board also includes: a common electrode voltage filter circuit 11 disposed on the flexible circuit board substrate, used to filter the common electrode voltage VCOM input by the driving integrated chip 12 included in the capacitive touch display device , and input the filtered common electrode voltage into the common electrodes arranged around the capacitive touch screen included in the capacitive touch display device through the common electrode voltage output terminal OUTPUT;

[0033] The flexible circuit board also includes a filter unit,

[0034] like figure 2 As shown, the filter unit includes:

[0035] The conductive layer 21 is arranged on the flexible circuit board substrate 20, and is electrically connected to the common electrode voltage output t...

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PUM

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Abstract

The invention provides a flexible printed circuit, a preparation method of the flexible printed circuit, and a capacitive touch display device. The flexible printed circuit comprises a flexible printed circuit substrate, a common electrode voltage filter circuit arranged on the flexible printed circuit substrate, and a filter unit, wherein the filter unit comprises a conductive layer arranged on the flexible printed circuit substrate and electrically connected with a common electrode voltage output end of the common electrode voltage filter circuit, an insulating layer laid on the conductive layer, and an earthed shielding film laid on the insulating layer and parallel to the conductive layer. The flexible printed circuit, the preparation method and the capacitive touch display device can reduce interference of a capacitive touch screen due to noise of common electrode voltage.

Description

technical field [0001] The invention relates to the field of capacitive touch technology, in particular to a flexible circuit board, a manufacturing method thereof, and a capacitive touch display device. Background technique [0002] The long and narrow common electrodes plated on the four sides of the capacitive touch screen form a low-voltage AC electric field in the conductor layer. When a finger touches the screen, due to the electric field of the human body, a coupling capacitance will be formed between the finger and the conductor layer, and the current from the common electrodes on the four sides of the capacitive touch screen will flow to the contacts, and the strength of the current is proportional to the distance from the finger to the common electrode , The controller located behind the capacitive touch screen calculates the proportion and strength of the current, and accurately calculates the position of the touch point. [0003] However, the capacitive touch sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/02H05K3/30G06F3/044
CPCG06F3/0412G06F3/04164G06F3/04184G06F3/044G06F2203/04103G06F2203/04107H05K1/0219H05K1/162G06F3/0418H05K1/025H05K1/0259H05K1/0298H05K3/4644H05K2201/05
Inventor 唐秀珠季斌
Owner BOE TECH GRP CO LTD
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