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Electrophoresis display smart card and method for manufacturing the same

A technology of electrophoretic display and smart card, which is applied to record carriers used in machines, instruments, computer components, etc., and can solve the problems of liquid crystal display performance impact, high price, and lack of portability

Active Publication Date: 2008-05-28
GUANGZHOU OED TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the protective layer is thick enough to stabilize the performance of the display, the flexibility of the display will be significantly reduced. This structure is often not conducive to the flexibility requirements of the smart card, and the thickness of the entire smart card is greatly increased, which will also lack portability.
[0013] Another option is to use an expensive protective film, such as the flexible glass (Flexible glass) substrate produced by the BarixCoating technology of Vitex Corporation in the United States. It is composed of multiple inorganic and organic barrier layers and has excellent performance. Its water vapor diffusion Speed ​​is only 10 -5 ~10 -6 g / m2 / day, but the cost of smart cards made from this material is too high
[0014] In addition, the plastic-based liquid crystal display has very strict requirements on the distance between the upper and lower electrodes. When the display layer is bent to change the distance between the upper and lower electrodes, the performance of the liquid crystal display will be greatly affected.
Due to the above reasons, smart cards with display functions have not really been widely used at present.

Method used

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  • Electrophoresis display smart card and method for manufacturing the same
  • Electrophoresis display smart card and method for manufacturing the same
  • Electrophoresis display smart card and method for manufacturing the same

Examples

Experimental program
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Effect test

preparation example Construction

[0070] In the preparation of the flexible electrophoretic display device layer, the display material can be continuously coated on the substrate, and then an adhesive layer is coated on the display material layer. Coating can be done using different instruments, such as Nakamura's doctor blade in the SID'98 Digest report, and the pre-measurement coating described in Chinese patent applications (application numbers 200310123446.5 and 200320130781.3).

[0071] like image 3 As shown, the display device is usually composed of a transparent substrate 1, a display material layer 2, and an adhesive layer 3. The substrate 1 is usually composed of two parts: a transparent flexible bottom layer 5, such as polyethylene terephthalate polyethylene terephthalate with a barrier layer. ester or naphthalene dicarboxylate polyester film; transparent conductive layer 6, such as indium tin oxide ITO, etc. In the present invention, the production of the upper display material layer 2 can be base...

example 1

[0095] Example 1: The coil and the display are on the same side

[0096] like Figure 13 As shown, 1300 is the plastic substrate, 1310 is the silver coil made of polymer thick film, 1320 is the lower layer control circuit of the display, 1330 is the driving circuit, 1340 is the connection between the coil, the driving circuit and the control circuit, 1350 For the IC chip.

[0097] After the above steps are completed, if Figure 14 As shown, a substrate 1000 with integrated functional circuits such as coils, drive circuits, and control circuits is obtained. After placing the electrophoretic display device 1010 above the control circuit 1320, the protective films 1020 and 1030 are placed on the upper and lower sides, as shown in the figure below , using hot pressing to press the above four layers into one body to form a smart card with display and radio frequency identification functions.

example 2

[0098] Example 2: Coil and display on opposite sides

[0099] like Figure 15 As shown, 1500 is the plastic substrate, 1510 is the induction coil etched by the copper plate, 1520 is the display lower layer control circuit on the other side of the substrate, 1530 is the driving circuit on the other side of the substrate, 1540 is connecting both sides For the drilling of the circuit, use the PTH method (plating through hole) to connect the circuits on both sides. 1550 is the connection between the coil, the driving circuit and the control circuit, and 1560 is the IC chip.

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PUM

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Abstract

This invention discloses one electrophoresis display intelligent card and its process method. The intelligent card comprises outer protective film, function circuit and display device, wherein, the said display device is electrophoresis display device; the said function circuit comprises electrophoresis display control circuit and drive circuit to control the said device. The method comprises the following steps: processing displaying device and flexible electric circuit board; then fixing the electrical parts on the flexible electronic circuit board; finally integrating the device and flexible electronic circuit board for sealed.

Description

technical field [0001] The invention relates to a smart card and a manufacturing method thereof, in particular to an electrophoretic display smart card and a manufacturing method thereof. Background technique [0002] A smart card (Smart Card) generally refers to a plastic card of a given size on which an integrated circuit chip is encapsulated for storing and processing data. Our commonly used smart cards are roughly divided into four types: memory cards, encrypted memory cards, CPU cards, radio frequency cards, etc. From the perspective of whether it is in contact with the reader, smart cards are divided into two types: contact type and non-contact type. The following takes the contactless smart card in radio frequency mode as an example to briefly introduce the smart card. [0003] Contactless smart card, also known as inductive smart card, was born in the early 1990s. Due to the incomparable advantages of magnetic cards and contact smart cards, once it came out, it imm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/07
Inventor 漳立冰陈宇
Owner GUANGZHOU OED TECH INC