EL film sheet and its making method, and mobile phone keyboard with this film sheet

A film and front electrode technology, applied in the field of EL film, to reduce the thickness of the EL film, uniform illumination, and improve the flexibility of the EL film

Inactive Publication Date: 2008-06-04
海宁市盐官工业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is in order to solve the above-mentioned problem of existing EL diaphragm, proposes a kind

Method used

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  • EL film sheet and its making method, and mobile phone keyboard with this film sheet
  • EL film sheet and its making method, and mobile phone keyboard with this film sheet
  • EL film sheet and its making method, and mobile phone keyboard with this film sheet

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Embodiment Construction

[0029] The sectional view of the EL diaphragm of the prior art and the schematic diagram of the backlight of the EL keyboard keys are shown in the attached figure 1 , image 3 . The cross-sectional view of the EL membrane involved in the present invention and the schematic diagram of the backlight of the keys of the EL keyboard are shown in figure 2 , Figure 4 .

[0030] On the premise of ensuring the uniformity of illumination, in order to minimize the influence of the EL sheet on the touch of the key, the thickness of the EL film must be reduced and the flexibility of the EL film must be increased.

[0031] The invention adopts a novel transparent electrode to replace the traditional PET / ITO conductive film. Screen printing polymer transparent conductive paste on transparent flexible film to form a new type of transparent electrode. A method for reducing the thickness of the EL sheet and improving the flexibility of the EL sheet is provided.

[0032] First, with a tr...

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PUM

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Abstract

The invention discloses an inorganic electroluminescence (EL) diaphragm, a manufacture method and a mobile phone keyboard formed thereof. The diaphragm consists of a transparent substrate, a transparent conducting layer, a bus bar, an emitting layer, a dielectric layer, a back electrode layer and an insulating layer. By adopting the method for screen-printing the polymeric transparent conducting layer on the transparent and flexible diaphragm substrate, a novel transparent electrode is formed to replace a traditional conductive film of poly ethylene terephthalate / indium tin oxide (PET/ITO). The method reduces the thickness of the EL diaphragm and significantly improves the flexibility of the EL diaphragm. As for the mobile phone keyboard made of the EL diaphragm, a whole piece of the EL diaphragm adheres to a circuit board with an arched metal shrapnel. As the ultra-thin and flexible EL diaphragm hardly affects feeling of key, openwork process is not required on the metal shrapnel. Therefore, the invention provides backlight for the mobile phone keyboard with a good feeling of key, thin thickness and even luminescence.

Description

technical field [0001] The invention relates to an EL (inorganic electroluminescence) film, its manufacturing method, and a mobile phone keyboard formed by it. technical background [0002] Most of the keyboard backlights of existing mobile phones use LEDs as light-emitting elements, and the light sources formed by LED lights are installed at the bottom of the keys. LED button backlight has the disadvantage of uneven brightness. To solve this problem, it is necessary to increase the number of LEDs, which will greatly increase the shape and weight, and the LED consumes a lot of power. The battery of the mobile phone is consumed quickly, so it cannot be used for a long time. In addition, the LED lamp has a large volume and needs to occupy a large space, resulting in an increase in the overall thickness of the button. [0003] Because the electroluminescent (EL) element is a sheet-shaped surface light source, the thickness is thin, the light is uniform, and the power consumpti...

Claims

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Application Information

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IPC IPC(8): H05B33/02H05B33/26H05B33/20H05B33/22H05B33/10
Inventor 赖金洪
Owner 海宁市盐官工业投资有限公司
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