CN101995676A - Substrate circuit and liquid crystal display (LCD) system using same - Google Patents

Abstract

The invention is a substrate circuit and a liquid crystal display system using the substrate circuit. The substrate circuit includes a substrate layer and a circuit layer arranged on the substrate layer, and a plurality of electrode pad areas are arranged on the substrate layer. The circuit layer includes a liquid crystal display panel driving circuit and a plurality of signal lines, the liquid crystal display panel driving circuit is connected to a plurality of electrode pad areas provided on the substrate layer, the plurality of signal lines extend to the plurality of electrode pad areas and It is used to connect the driving circuit of the liquid crystal display panel and transmit signals when the liquid crystal display panel displays. The substrate circuit further includes a plurality of test contact pad areas, and the plurality of test contact pad areas are respectively arranged on the plurality of signal lines. The cost of the substrate circuit and the liquid crystal display system using the substrate circuit is relatively low, and the impedance of the signal line is relatively small.

Description

Substrate circuit and liquid crystal display system using the substrate circuit

technical field

The invention relates to a circuit, in particular to a substrate circuit and a liquid crystal display system using the substrate circuit.

Background technique

With the continuous development of electronic technology, at present, liquid crystal display (Liquid Crystal Display, LCD) has gradually replaced the traditional bulky cathode ray display (Cathode Ray Tube, CRT) because of its advantages of small size and light weight. It is widely used by the general public, especially in electronic products such as monitors, notebook computers, digital cameras and projectors. An LCD module generally includes an LCD panel, a backlight module and a printed circuit board (PCB).

Among them, the LCD panel generally has a driving semiconductor chip. In the prior art, the mounting methods for the driving semiconductor chip generally include TAB (tape automated bonding) technology and COG (chip-on-glass, chip-on-glass) technology. The TAB technology is to place the driving semiconductor chip on the TAB tape, and then the tape is connected to the electrode pad area formed on the LCD panel. COG technology connects the driving semiconductor chip directly to the electrode pad area of the LCD panel. The latter has the advantages of smaller size and lower cost than the former.

At the same time, there are GOA (Gate Driver on Array, gate driver circuit fabricated on the array substrate) technology and WOA (Wire on Array, wires fabricated on the array substrate) technology. The application of GOA technology can reduce production process procedures, reduce product process costs, and improve the high integration of TFT-LCD panels. In the GOA design, when the scan driver chip adopts the COG architecture, the WOA technology is used to connect adjacent chips.

Please refer to Fig. 1, in the general GOA design, the substrate circuit 100 of the LCD system includes a substrate layer 110, a plurality of driver chips 120 arranged on the substrate layer 110, and a plurality of electrode pads connected to each chip 120 area 130 and several WOA signal lines 131 . Each WOA signal line 131 corresponds to a driver chip 120 and is electrically connected to the electrode pad region 130 connected to the driver chip 120 . In order to test the circuit of the LCD system 100 , at least one test pin 140 and one unit test contact pad area 141 are additionally provided on the substrate layer 110 corresponding to each driver chip 120 . Wherein, the plurality of electrode pad areas 130 and at least one test pin 140 are arranged side by side. Each unit test contact pad area 141 corresponds to a driver chip 120 and is connected to the extended test pin 140 of the driver chip 120 for testing.

However, when the number of WOA signal lines is large, the number of test pins 140 will also increase accordingly, resulting in high cost of the substrate layer 110 . At the same time, due to the setting of the test pins 140, the number of pins and electrode pad areas set on the substrate layer 110 is large, and the unit test contact pad area 141 also takes up space, so that the wiring space of the WOA signal line is small , it is difficult to avoid the influence of the impedance of the WOA signal line on the performance of the entire circuit.

Contents of the invention

The object of the present invention is to provide a substrate circuit, which can effectively reduce the cost and reduce the impedance of the WOA signal line.

In addition, a liquid crystal display system with the substrate circuit is also provided.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions.

A substrate circuit, which includes a substrate layer and a circuit layer arranged on the substrate layer, and a plurality of electrode pad areas are arranged on the substrate layer. The circuit layer includes a liquid crystal display panel driving circuit and a plurality of signal lines, the liquid crystal display panel driving circuit is connected to a plurality of electrode pad areas provided on the substrate layer, the plurality of signal lines extend to the plurality of electrode pad areas and It is used to connect the driving circuit of the liquid crystal display panel and transmit signals when the liquid crystal display panel displays. The substrate circuit further includes a plurality of test contact pad areas, and the plurality of test contact pad areas are respectively arranged on the plurality of signal lines.

In the above substrate circuit, the substrate layer is a glass substrate.

In the above substrate circuit, the substrate layer can also be an insulating film.

In the above substrate circuit, the circuit layer is a flexible printed circuit board.

In the above substrate circuit, the liquid crystal display panel drive circuit includes a plurality of liquid crystal display panel drive chips, each signal line corresponds to a drive chip, and is formed by extending the electrode pad area connected to the drive chip; each test contact pad area Corresponding to a driving chip, the signal line connected through the test contact pad area is connected to the electrode pad area connected to the driving chip.

In the above substrate circuit, the test contact pad area is formed by opening a window on its corresponding signal line to expose a part of the conductive area of the signal line.

In the above substrate circuit, the test contact pad area is provided with a conductive film on its corresponding signal line, and the conductive film contacts and is electrically connected to the signal line.

The substrate circuit sets the test contact pad area on the signal line, so that there is no need to set extra pins for the test contact pad area, which can reduce the width and material consumption of the substrate layer, thereby reducing the cost of the substrate circuit. At the same time, since there are fewer setting pins, the wiring area space of the signal line is increased, and the impedance of the signal line can be reduced, thereby improving the performance of the entire circuit.

A liquid crystal display system includes a substrate layer and a circuit layer arranged on the substrate layer. A plurality of electrode pad areas are arranged on the substrate layer. The circuit layer includes a plurality of liquid crystal display panel driving chips and a plurality of signal lines. The plurality of liquid crystal display panel driver chips are connected to a plurality of electrode pad areas provided on the substrate layer, and the plurality of signal lines extend to the plurality of electrode pad areas and are used to connect the plurality of liquid crystal display panel driver chips and Transmits signals when the LCD panel is displayed. The substrate circuit further includes a plurality of test contact pad areas, and the plurality of test contact pad areas are respectively arranged on the plurality of signal lines.

In the above liquid crystal display system, the substrate layer is a glass substrate or an insulating film.

In the above liquid crystal display system, the circuit layer is a flexible printed circuit board.

The above-mentioned liquid crystal display system is realized in an electronic device, and the electronic device includes: the display panel and an input device, the input device is coupled to the display panel to provide the video signal to the display panel, so that the display panel can Play the video. The electronic device is a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a television, a vehicle screen or a portable multimedia player.

The liquid crystal display system sets the test contact pad area of the substrate circuit on the signal line, so that there is no need to set additional pins for the test contact pad area, which can reduce the width and material consumption of the substrate layer, thereby reducing the cost of the substrate circuit . At the same time, since there are fewer setting pins, the wiring area space of the signal line is increased, and the impedance of the signal line can be reduced, thereby improving the performance of the entire liquid crystal display system circuit.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a wiring structure diagram of a substrate circuit in the prior art.

FIG. 2 is a structural diagram of a preferred embodiment of the substrate circuit of the present invention.

100, 200: substrate circuit 110, 210: substrate layer

120, 220: driver chip 130, 230: electrode pad area

131, 231: WOA signal line 140: Test pin

141, 241: Test contact pad area

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the backlight module proposed according to the present invention and the liquid crystal display module using the backlight module are described below in conjunction with the accompanying drawings and preferred embodiments. Its specific implementation, structure, feature and effect thereof are described in detail as follows.

Please refer to FIG. 2 , a preferred embodiment of the substrate circuit 200 of the present invention is applied to a liquid crystal display system, which includes a substrate layer 210 and a circuit layer (not shown) disposed on the substrate layer 210 . A plurality of electrode pad regions 230 are disposed on the substrate layer 210 . The circuit layer includes a plurality of driving chips 220 disposed on the substrate layer 210 , a plurality of WOA signal lines 231 and a plurality of test contact pad regions 241 disposed on the plurality of WOA signal lines 231 . The driving chips 220 are electrically connected to the plurality of electrode pad regions 230 . Wherein, each WOA signal line 231 corresponds to a driving chip 220 , and is formed by extending the electrode pad region 230 connected to the driving chip 220 . The plurality of WOA signal lines 231 are used to connect the plurality of driving chips 220 and transmit signals when the liquid crystal display panel displays. Each test contact pad area 241 corresponds to a driving chip 220 , and is connected to the electrode pad area 230 connected to the driving chip 220 through the WOA signal line 231 connected thereto for testing. The test contact pad area 241 can be formed by opening a window on the corresponding WOA signal line 231 to expose a part of the conductive area of the WOA signal line 231 . The test contact pad area 241 can also contact and be electrically connected with the WOA signal line 231 by disposing a conductive film on the corresponding WOA signal line 231 .

Wherein, the substrate layer is a glass substrate or an insulating film. The circuit layer can be a flexible printed circuit board (flexible printed circuit, FPC), the plurality of driver chips 220, a plurality of electrode pad areas 230 connected to the plurality of driver chips 220, a plurality of WOA signal lines 231 and the A plurality of test contact pad areas 241 on the plurality of WOA signal lines 231 can be formed on the flexible printed circuit board.

In addition, the present invention also provides a liquid crystal display system with the above-mentioned substrate circuit, and the said substrate circuit can be used for the driving circuit of the liquid crystal display system and the test before the installation of the liquid crystal display system. The liquid crystal display system is implemented in an electronic device, and the electronic device includes: the liquid crystal display system and an input device, the input device is coupled to the liquid crystal display system to provide the video to the liquid crystal display system, so that The liquid crystal display system can play the video.

The electronic device is a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a television, a vehicle screen or a portable multimedia player.

In summary, the substrate circuit of the preferred embodiment of the present invention and the liquid crystal display system having the substrate circuit set the test contact pad area 241 on the WOA signal line 241, so that there is no need to additionally provide special pins for the test contact pad area 241 , can reduce the width and material consumption of the substrate layer 210, thereby reducing the cost of the substrate circuit. At the same time, since there are fewer pins, the wiring area of the WOA signal line 231 is increased, and the impedance of the WOA signal line 231 can be reduced, thereby improving the performance of the entire circuit.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (12)

1. A substrate circuit, comprising a substrate layer and a circuit layer arranged on the substrate layer, a plurality of electrode pad areas are provided on the substrate layer, and the circuit layer includes a liquid crystal display panel drive circuit and a plurality of signal lines , the liquid crystal display panel drive circuit is connected to a plurality of electrode pad regions provided on the substrate layer, and the plurality of signal lines extend to the plurality of electrode pad regions and are used to connect the liquid crystal display panel drive circuit and display When the panel is displayed, the signal is transmitted, and the feature is that: the substrate circuit further includes a plurality of test contact pad areas, and the plurality of test contact pad areas are respectively arranged on the plurality of signal lines. 2. The substrate circuit according to claim 1, wherein the substrate layer is a glass substrate. 3. The substrate circuit according to claim 1, wherein the substrate layer is an insulating film. 4. The substrate circuit according to claim 1, wherein the circuit layer is a flexible printed circuit board. 5. The substrate circuit according to claim 1, wherein the liquid crystal display panel driving circuit includes a plurality of liquid crystal display panel driving chips, each signal line corresponds to a driving chip, and the electrode pads connected by the driving chips Each test contact pad area corresponds to a driver chip, and the signal line connected to the test contact pad area is connected to the electrode pad area connected to the driver chip. 6. The substrate circuit according to claim 1, wherein the test contact pad area is formed by opening a window on its corresponding signal line to expose a part of the conductive area of the signal line. 7 . The substrate circuit according to claim 1 , wherein the test contact pad area is provided with a conductive film on its corresponding signal line, and the conductive film contacts and is electrically connected to the signal line. 7 . 8. A liquid crystal display system, comprising a substrate layer and a circuit layer arranged on the substrate layer, the substrate layer is provided with a plurality of electrode pad areas, the circuit layer includes a plurality of liquid crystal display panel driver chips and a plurality of Signal lines, the plurality of liquid crystal display panel drive chips are connected to a plurality of electrode pad areas provided on the substrate layer, and the plurality of signal lines extend to the plurality of electrode pad areas and are used to connect the plurality of liquid crystal display panels To drive the chip and transmit signals when the liquid crystal display panel is displayed, the feature is that the substrate circuit also includes a plurality of test contact pad areas, and the plurality of test contact pad areas are respectively arranged on the plurality of signal lines. 9. The liquid crystal display system according to claim 8, wherein the substrate layer is a glass substrate or an insulating film. 10. The liquid crystal display system according to claim 8, wherein the circuit layer is a flexible printed circuit board. 11. The liquid crystal display system according to claim 8, characterized in that: the liquid crystal display system is implemented in an electronic device, the electronic device comprises: the display panel and an input device, the input device is coupled to the display panel , for providing the video to the display panel so that the display panel can play the video. 12. The liquid crystal display system according to claim 11, wherein the electronic device is a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a television, a car screen or a portable multimedia player device.

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