Electronic paper display device with touch function

Abstract

The invention provides an electronic paper display device with a touch function, which successively comprises a composite transparent electrode layer, an electrophoretic display medium layer contacted with the composite transparent electrode layer, a pixel electrode layer, a power supply and a drive circuit. The composite transparent electrode layer forms the touch electrode layer of the display device; one layer of a transparent electrode layer in the composite transparent electrode layer, the pixel electrode layer and the electrophoretic display medium layer form the display layer of the display device; and the drive circuit is used for detecting the touch position of the composite transparent electrode layer and driving the electrophoretic display medium layer to display. The composite transparent electrode layer is adopted so as to omit the glass base plate of a touch screen and the upper substrate of electronic paper, thus reducing the reflection and refraction processes of lights, ensuring better integrated display effect of the display screen, and not generating flow ring and other optical interferences; and meanwhile, no internal contamination is introduced during the assembling process.

Description

technical field [0001] The invention relates to an electronic paper display device, in particular to an electronic paper display device with a touch function. Background technique [0002] Due to the advantages of low power consumption, flexibility, and thin thickness, electronic paper displays are widely used as display screens in electronic products such as mobile phones, e-books, computers, and personal digital assistants. [0003] The structure of an electronic paper display usually includes an upper substrate, a lower substrate, and an electrophoretic display medium layer. A common ITO electrode is provided on the lower surface of the upper substrate, and a TFT pixel electrode is provided on the upper surface of the lower substrate. The electrophoretic display medium layer is closely attached to the public ITO electrode and between the TFT pixel electrodes. The structure of the existing electronic paper display with touch function is usually that the surface of the ele...

AI Technical Summary

Problems solved by technology

The touch screen used is usually composed of glass or film substrate and ITO layer. Since the light passes through the glass, there will be a process of refraction and reflection, and the light reaching the electronic paper will have a large attenuation, especially the electronic paper is a reflective display screen, which itself does not have Backlight device, the light loss caused by the touch screen is very obvious

In addition, the electronic paper display screen and the touch screen are bonded by an adhesive layer. During the assembly and manufacturing process, dust-free conditions are required, and the environmental requirements are relatively strict, which increases the manufacturing cost. Otherwise, it is easy to introduce "internal pollution." ”, increasing the defect rate of display devices in the manufacturing process

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