Signal transmission apparatus and display apparatus
地域：
Shenzen
摘要
The present disclosure illustrates a signal transmission device and a display device using the same. The signal transmission device includes a first flexible printed circuit board comprising a first circuit layer and a connection member, wherein the first circuit layer is electrically connected to a display module and a system; a second flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a second circuit layer; a third flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a third circuit layer; insulating layers disposed between the first, second and third flexible printed circuit boards, and comprising a plurality of through holes formed thereon in a vertical direction; and conductive pillars disposed in the through holes, respectively, wherein the second and third circuit layer are electrically connected to the system through the first circuit layer and the conductive pillars.
說(shuō)明書(shū)
This application is a National Stage Application of PCT International Patent Application No. PCT/CN2017/111207 filed on Nov. 15, 2017, under 35 U.S.C. § 371, which claims priority to and the benefit of Chinese Patent Application No. 201711022847.X, filed on Oct. 26, 2017, and the disclosures of which are incorporated herein in their entirety by reference.
The present disclosure relates to a signal transmission device, and more particularly to a signal transmission device including a plurality of printed circuit boards, and a display device using the signal transmission device.
In general, a liquid crystal display device with a touch control function (hereafter refer to as a touch control liquid crystal device) includes a system, a LCD panel, a touch panel and a light source. In a structure of a typical touch control liquid crystal device, the signals of the LCD panel, the touch panel and the light source are transmitted through different flexible printed circuit boards. However, in order to transmit the signals to the system through the flexible printed circuit boards, the signals must be through three ports electrically connected to the system, so that the system must have larger space for the plurality of ports, and reduction of the size of the device is limited.
權(quán)利要求
What is claimed is:1. A signal transmission device, comprising:a first flexible printed circuit board comprising a first circuit layer and a connection member, wherein the first circuit layer is electrically connected to a display module and a system; a second flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a second circuit layer, wherein the second circuit layer is electrically connected to the display module and the first flexible printed circuit board; a third flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a third circuit layer, wherein the third circuit layer is electrically connected to the display module and the first flexible printed circuit board; a plurality of insulating layers disposed between the first flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board, and comprising a plurality of through holes formed thereon in a vertical direction; and a plurality of conductive pillars disposed in the plurality of through holes, respectively, wherein the second circuit layer and the third circuit layer are electrically connected to the system through the first circuit layer and the plurality of conductive pillars; wherein the second circuit layer and the third circuit layer are both in direct connection with the display module, and signals on the third circuit layer are transmitted through the second circuit layer and then the first circuit layer via the plurality of conductive pillars in order to establish communication between the display module and the system. 2. The signal transmission device according to claim 1 , wherein material of the insulating layer is selected from the group consisting of polyimide, polyethylene terephthalate, polyethylene naphthalate. 3. The signal transmission device according to claim 1 , wherein material of the conductive pillar is conductive adhesive. 4. The signal transmission device according to claim 1 , wherein the second flexible printed circuit board and the third flexible printed circuit board are disposed on the same plane. 5. The signal transmission device according to claim 1 , wherein the third flexible printed circuit board is disposed on the second flexible printed circuit board. 6. A signal transmission device, comprising:an insulation substrate; a connection member disposed on the insulation substrate and electrically connected to a system; a first conductive pattern disposed on the insulation substrate, and electrically connected to a display module and the connection member; a second conductive pattern disposed on the first conductive pattern, and electrically connected to the display module and the first conductive pattern; a third conductive pattern disposed on the second conductive pattern, and electrically connected to the display module and the second conductive pattern; a plurality of insulation layers disposed between the first conductive pattern, the second conductive pattern and the third conductive pattern, respectively, and configured to insulate and attach the first conductive pattern, the second conductive pattern and the third conductive pattern; an interlayer conduction structure disposed in the insulation layers, wherein the second conductive pattern and the third conductive pattern are electrically connected to the system through the first conductive pattern through the interlayer conduction structure; wherein the second conductive pattern and the third conductive pattern are both in direct connection with the display module, and signals on the third conductive pattern are transmitted through the second conductive pattern and then the first conductive pattern via the interlayer conduction structure in order to establish communication between the display module and the system. 7. The signal transmission device according to claim 6 , wherein the interlayer conduction structure comprises through hole formed in the insulation layer in vertical direction. 8. The signal transmission device according to claim 7 , wherein an inner wall of the through hole is coated with conductive layer. 9. The signal transmission device according to claim 8 , wherein the insulating layer and the first conductive pattern and the second conductive pattern are attached with each other by solidifying prepolymer solution. 10. A display device, comprising:a display module; a system; wherein the display module and the system are electrically connected through a signal transmission device, and the signal transmission device comprises: a first flexible printed circuit board comprising a first circuit layer and a connection member, wherein the first circuit layer is electrically connected to the display module and the system through the connection member; a second flexible printed circuit board disposed on the first flexible printed circuit board and comprising a second circuit layer, wherein the second circuit layer is electrically connected to the display module and the first flexible printed circuit board; a third flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a third circuit layer, wherein the third circuit layer is electrically connected to the display module and the first flexible printed circuit board; a plurality of insulating layers disposed between the first flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board, and disposed under the first flexible printed circuit board, and comprising a plurality of through holes formed thereon in a vertical direction; a plurality of conductive pillars disposed in the plurality of through holes, respectively, wherein the second circuit layer and the third circuit layer are electrically connected to the system through the first circuit layer and the plurality of conductive pillars; wherein the second circuit layer and the third circuit layer are both in direct connection with the display module, and signals on the third circuit layer are transmitted through the second circuit layer and then the first circuit layer via the plurality of conductive pillars in order to establish communication between the display module and the system. 11. The display device according to claim 10 , wherein material of the insulating layer is polyimide. 12. The display device according to claim 10 , wherein material of the insulating layer is polyethylene terephthalate. 13. The display device according to claim 10 , wherein material of the conductive pillar is conductive adhesive. 14. The display device according to claim 10 , wherein the third flexible printed circuit board and the second flexible printed circuit board are dispose d on the same plane. 15. The display device according to claim 10 , wherein the third flexible printed circuit board is disposed on the second flexible printed circuit board. 16. A manufacturing method of a signal transmission device, comprising:disposing an insulation substrate; disposing a connection member on the insulation substrate, and electrically connecting the connection member and a system; disposing a first conductive pattern on the insulation substrate, and electrically connecting the first conductive pattern and the display module and the connection member; disposing a second conductive pattern on the first conductive pattern, and electrically connecting the second conductive pattern, the display module and the first conductive pattern; disposing a third conductive pattern on the second conductive pattern, and electrically connecting the third conductive pattern, the display module and the second conductive pattern; disposing an insulating layers between the first conductive pattern, the second conductive pattern and the third conductive pattern, to insulating and attaching the first conductive pattern, the second conductive pattern and the third conductive pattern; and disposing an interlayer conduction structure, wherein the interlayer conduction structure comprises: disposing through holes on the insulating layer in a vertical direction; and coating conductive layers on inner walls of the through holes; wherein the conductive layers are electrically connected to at least one of the first conductive pattern, the second conductive pattern and the third conductive pattern, so that the second conductive pattern and the third conductive pattern are electrically connected to the system through the first conductive pattern; wherein the second conductive pattern and the third conductive pattern are both in direct connection with the display module, and signals on the third conductive pattern are transmitted through the second conductive pattern and then the first conductive pattern via the interlayer conduction structure in order to establish communication between the display module and the system. 17. A display device, comprising:a display module; a system; wherein the display module and the system are electrically connected to each other through a signal transmission device, and the signal transmission device comprises: a first flexible printed circuit board comprising a first circuit layer and a connection member, wherein the first circuit layer is electrically connected to the display module and the system through the connection member; a second flexible printed circuit board disposed on the first flexible printed circuit board and comprising a second circuit layer, wherein the second circuit layer is electrically connected to the display module and the first flexible printed circuit board; a third flexible printed circuit board disposed on the first flexible printed circuit board, and comprising a third circuit layer, wherein the third flexible printed circuit board and the second flexible printed circuit board are disposed on different planes, and the third circuit layer is electrically connected to the display module and the first flexible printed circuit board; a plurality of insulating layers made by material selected from the group consisting of polyimide, polyethylene terephthalate, polyethylene naphthalate, and disposed between the first flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board, wherein the plurality of insulating layers comprise a plurality of through holes in a vertical direction; and a plurality of conductive pillars disposed in the plurality of through holes, respectively, wherein the second circuit layer and the third circuit layer are electrically connected to the system through the first circuit layer and the plurality of conductive pillars; wherein the second circuit layer and the third circuit layer are both in direct connection with the display module, and signals on the third circuit layer are transmitted through the second circuit layer and then the first circuit layer via the plurality of conductive pillars in order to establish communication between the display module and the system.
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