CN209859586U - Liquid crystal display's test system - Google Patents
Liquid crystal display's test system Download PDFInfo
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- CN209859586U CN209859586U CN201920661833.0U CN201920661833U CN209859586U CN 209859586 U CN209859586 U CN 209859586U CN 201920661833 U CN201920661833 U CN 201920661833U CN 209859586 U CN209859586 U CN 209859586U
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Abstract
The utility model provides a test system of a liquid crystal display screen, which comprises a glass with a conductive film circuit and a liquid crystal drive IC chip bound on the glass with the conductive film circuit, the glass with the conductive film circuit is electrically connected with a control mainboard through a first flexible printed circuit board, the glass with the conductive film circuit is electrically connected with a semi-finished product of the liquid crystal display screen to be tested through a second flexible printed circuit board, thus, the liquid crystal drive IC chip is bound on the glass with the conductive film circuit, the drive IC-power supply function control lead of the liquid crystal drive IC chip is connected to the control mainboard through the first flexible printed circuit board, the drive IC-power supply function control lead of the liquid crystal drive IC chip is connected to the position of the semi-finished product of the liquid crystal display screen through the second flexible printed circuit board to drive the liquid crystal display screen to work, and the semi-finished product of the liquid crystal display screen to, and the test precision is high, and the method is suitable for the mainstream black-and-white liquid crystal display products in the current market.
Description
Technical Field
The utility model belongs to the technical field of the electronic product, especially, relate to a liquid crystal display's test system.
Background
And the black and white liquid crystal display screen is used for electronic information display, information display of man-machine exchange of the intelligent chip and the MCU terminal, and the market application is very wide. The liquid crystal display screen needs to be tested in different modes in the production, manufacturing and assembling processes, and products meeting the indexes are ensured to be achieved. In the production and assembly process, the liquid crystal display screen needs to be tested in two main stages, namely a first stage: and detecting the liquid crystal glass semi-finished product, detecting whether the voltage and the circuit have open circuit or short circuit, and processing and assembling qualified products in the next procedure. And a second stage: and testing after the drive chip and the connecting wire are assembled, and packaging and warehousing qualified products.
The existing testing method for the liquid crystal glass semi-finished product comprises the following steps:
1. and connecting each PIN lead by using a probe, connecting the PIN lead with a driving IC chip, and electrifying to generate signals for testing. The advantages are that: the lead wire of the LCD is accurately connected, and whether the semi-finished product is qualified or not can be directly judged; the disadvantages are that: due to the thickness of the probe, such as the diameter of the common thinner probe is 0.5mm, the needle head is 0.02mm, and the line distance is about 0.2mm, the total line width and the line distance is 0.7 mm. Therefore, the product manufacturing and testing jig with the line width and the line distance being less than 0.7mm needs high requirements, the cost is increased, the current market mainstream is that the line width and the line distance are 0.2mm, most lead wires are 196, and if a probe connection test is adopted, the manufacturing process of the testing jig cannot be finished.
2. Adopt LCD electricity tester, electricity tester provides the pulse signal who has certain frequency and voltage electric current, is connected to the liquid crystal glazing semi-manufactured goods that need detect, and the circular telegram is tested, and the preferred electricity is: the cost is low, the manufacture is simple, the electric measuring machine is ready in batch and easy to purchase, and the method is a main product testing method in the current market. The disadvantages are that: the electric measuring machine is a simple signal generator, an early black and white liquid crystal screen product-a pen section type liquid crystal display screen, and during testing, two ends of the signal generator are connected to test whether the open circuit and short circuit conditions of the pen section and the symbol are qualified. The changeable parameters are manually adjusted voltage and frequency, and the scanning test cannot be carried out on the existing common dot matrix type black-and-white liquid crystal display screen products. During testing, the driver chip and the instruction of the combination software are not used, and the correct display mode cannot be achieved. And the actual display voltage of the liquid crystal product in the test can not be known, so that the voltage of the liquid crystal product in the semi-finished product state can drift to be defective, and the defective product can be detected only by the test in the second stage until the later stage of production, so that the production cost and the efficiency can be increased.
3. The method is applied to the liquid crystal screen or IC chip test of a color screen, and requires precise test equipment and a matched test tool and clamp during the test, so that the cost is very high, the batch cost of the black and white liquid crystal screen is high, and the method is not suitable for the market demand of the black and white liquid crystal screen.
However, the testing method used for the liquid crystal glass semi-finished product has the following defects:
1. if the test is not the model of the original chip and software, the test accuracy is not enough, and partial defective products flow into the post;
2. only the pen section and the symbol can be measured, and the method cannot be completely suitable for the mainstream black-and-white liquid crystal display products in the current market.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a liquid crystal display's test system, there is test precision to reach inadequately and can only survey stroke section and symbol in the test method that aims at solving current liquid crystal glass semi-manufactured goods, can't be suitable for the technical problem of the black and white liquid crystal display product of present market mainstream completely.
The utility model is realized in such a way, a testing system of a liquid crystal display screen comprises glass with a conductive film circuit, and a liquid crystal driving IC chip, a first flexible printed circuit board, a second flexible printed circuit board and a control mainboard are bound on the glass with the conductive film circuit; the glass with the conductive film circuit is electrically connected with the control main board through the first flexible printed circuit board, and the glass with the conductive film circuit is electrically connected with a semi-finished product of the liquid crystal display screen to be tested through the second flexible printed circuit board.
Furthermore, a driving IC-power supply function control lead terminal is arranged on one side of the glass with the conductive film circuit connected to the first flexible printed circuit board, a first signal circuit terminal adapted to the driving IC-power supply function control lead terminal is arranged on one side of the first flexible printed circuit board connected to the glass with the conductive film circuit, and the glass with the conductive film circuit is electrically connected to the first flexible printed circuit board through the matching of the driving IC-power supply function control lead terminal and the first signal circuit terminal.
Furthermore, a driving IC (integrated circuit) -connected liquid crystal display lead terminal is arranged on one side, connected with the second flexible printed circuit board, of the glass with the conductive film circuit, a second signal circuit terminal matched with the driving IC-connected liquid crystal display lead terminal is arranged on one side, connected with the glass with the conductive film circuit, of the second flexible printed circuit board, and the glass with the conductive film circuit is electrically connected with the second flexible printed circuit board through the matching of the driving IC-connected liquid crystal display lead terminal and the second signal circuit terminal.
Furthermore, a third signal line end is arranged on one side, connected with the liquid crystal screen semi-finished product to be tested, of the second flexible printed circuit board, a fourth signal line end matched with the third signal line end is arranged on one side, connected with the second flexible printed circuit board, of the liquid crystal screen semi-finished product to be tested, and the second flexible printed circuit board is electrically connected with the liquid crystal screen semi-finished product to be tested through matching of the third signal line end and the fourth signal line end.
Furthermore, a fifth signal line end is arranged on one side, connected with the control mainboard, of the first flexible printed circuit board, a sixth signal line end matched with the fifth signal line end is arranged on one side, connected with the first flexible printed circuit board, of the control mainboard, and the first flexible printed circuit board is electrically connected with the control mainboard through the matching of the fifth signal line end and the sixth signal line end.
Furthermore, a main control IC, a control switch, a DC power supply and a relay are also arranged on the control mainboard.
The embodiment of the utility model provides a test system of liquid crystal display, its take the glass of conducting film circuit and bind liquid crystal driver IC chip on the glass of conducting film circuit, the glass of conducting film circuit passes through first flexible printed circuit board with control mainboard electric connection, the glass of conducting film circuit passes through second flexible printed circuit board and the liquid crystal display semi-manufactured goods electric connection that awaits measuring, the utility model binds the liquid crystal driver IC chip on the glass of conducting film circuit, through first flexible printed circuit board with the drive IC-power supply function control pin of liquid crystal driver IC chip connect to control mainboard, through second flexible printed circuit board with the drive IC-power supply function control pin of liquid crystal driver IC chip directly receive the position drive liquid crystal work of liquid crystal display semi-manufactured goods, like this, just through the glass of preparation area conducting film circuit the liquid crystal drive IC chip has been bound on the glass of taking the conducting film circuit, and the glass of taking the conducting film circuit passes through first flexible printed circuit board with control mainboard electric connection, the glass of taking the conducting film circuit passes through second flexible printed circuit board and the liquid crystal display semi-manufactured goods electric connection that awaits measuring have realized the imitation test, the utility model discloses can contain different modes such as single-point, whole, dot matrix, alternate line, partition and scan to adopt software control, can simulate real equipment signal completely and test, thereby accomplish the simulation test to the liquid crystal display semi-manufactured goods that awaits measuring, and the test precision is high, applicable black and white liquid crystal display product of market mainstream at present.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test system for a liquid crystal display provided by an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a glass with a conductive film circuit of a testing system for a liquid crystal display provided by an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the first flexible printed circuit board, the second flexible printed circuit board and the control motherboard of the testing system of the liquid crystal display provided in the embodiment of the present invention.
Fig. 4 is a structural diagram of a second flexible printed circuit board of a testing system of a liquid crystal display screen according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a control main board of a testing system of a liquid crystal display provided by an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a liquid crystal display semi-finished product to be tested in a testing system of a liquid crystal display provided by an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 ~ 6, the embodiment of the utility model provides a test system for liquid crystal display, including the glass 1 of taking the conductive film circuit and the glass 1 of taking the conductive film circuit is gone up and is bound liquid crystal drive IC chip, first flexible printed circuit board 2, second flexible printed circuit board 3 and control mainboard 4, the glass 1 of taking the conductive film circuit pass through first flexible printed circuit board 2 with control mainboard 4 electric connection, the glass 1 of taking the conductive film circuit passes through second flexible printed circuit board 3 with the liquid crystal display semi-manufactured goods 5 electric connection that awaits measuring, like this, through making glass 1 of taking the conductive film circuit and bind liquid crystal drive IC chip on the glass 1 of taking the conductive film circuit, and the glass 1 of taking the conductive film circuit passes through first flexible printed circuit board 2 with control mainboard 4 electric connection, the glass 1 of taking the conductive film circuit passes through second flexible printed circuit board 3 with the liquid crystal display semi-manufactured goods 5 electric connection that awaits measuring, has realized the test of the applicable single-point simulation of different modes such as interlaced line, partition, dot matrix, and the real scanning simulation of the liquid crystal display that can carry out the test to the high-point simulation, thereby the high accuracy test of the liquid crystal display is applicable.
The first flexible printed circuit board 2 is used for connecting the glass 1 with the conductive film circuit and the control mainboard 4, and the control mainboard 4 supplies power and cooperates with software according to the control requirements of the functional pins, so that the liquid crystal drive IC chip can work to drive liquid crystal to display according to the requirements.
The second flexible printed circuit board 3 is used for connecting the glass 1 with the conductive film circuit and the liquid crystal display screen semi-finished product 5 to be tested, and connecting a test signal to the liquid crystal display screen semi-finished product 5.
Wherein, the semi-finished product 5 of the liquid crystal display screen is provided with an arrayed liquid crystal glass display area.
Further, a driving IC-power supply function control lead terminal 11 is arranged on one side of the glass 1 with the conductive film circuit connected to the first flexible printed circuit board 2, a first signal circuit terminal 21 adapted to the driving IC-power supply function control lead terminal 11 is arranged on one side of the first flexible printed circuit board 2 connected to the glass 1 with the conductive film circuit, and the glass 1 with the conductive film circuit is electrically connected to the first flexible printed circuit board 2 through the matching of the driving IC-power supply function control lead terminal 11 and the first signal circuit terminal 21.
Further, a driving IC-connecting liquid crystal display lead terminal 12 is arranged on one side of the glass 1 with the conductive film circuit connected to the second flexible printed circuit board 3, a second signal circuit terminal 31 adapted to the driving IC-connecting liquid crystal display lead terminal 12 is arranged on one side of the second flexible printed circuit board 3 connected to the glass 1 with the conductive film circuit, and the glass 1 with the conductive film circuit is electrically connected to the second flexible printed circuit board 3 through the matching of the driving IC-connecting liquid crystal display lead terminal 12 and the second signal circuit terminal 31.
Further, a third signal line end 32 is arranged on one side of the second flexible printed circuit board 3 connected with the liquid crystal screen semi-finished product 5 to be tested, a fourth signal line end 51 matched with the third signal line end 32 is arranged on one side of the liquid crystal screen semi-finished product 5 to be tested connected with the second flexible printed circuit board 3, and the second flexible printed circuit board 3 is electrically connected with the liquid crystal screen semi-finished product 5 to be tested through matching of the third signal line end 32 and the fourth signal line end 51.
Further, a main control IC chip 42, a control switch 43, a DC power supply 44 and a relay 45 are also arranged on the control motherboard 4, and the main control IC chip 42 is mainly used for supplying power and matching software according to the control requirements of the functional pins, so that the liquid crystal drives the IC chip to work and drives the liquid crystal to display according to the requirements.
In this embodiment, the third signal line end 32 and the fourth signal line end 5 are point contact communication signals, and the fourth signal line end 51 is a liquid crystal glass inner lead, and drives the liquid crystal display by a scanning signal.
Further, a fifth signal line end 22 is arranged on one side of the first flexible printed circuit board 2 connected to the control main board 4, a sixth signal line end 41 adapted to the fifth signal line end 22 is arranged on one side of the control main board 4 connected to the first flexible printed circuit board 2, and the first flexible printed circuit board 2 is electrically connected to the control main board 4 through the cooperation of the fifth signal line end 22 and the sixth signal line end 41.
Further, the control main board 4 is further provided with a main control IC chip 42, a control switch 43, a DC power supply 44 and a relay 55, so that the testing system of the liquid crystal display screen provided by the present invention can be programmed by the control switch 43, can be burned into the register of the controller according to the specified software program, can be connected to the liquid crystal driving IC chip for power supply and mode control through the first printed circuit board 2, the liquid crystal driving IC chip can receive the compiled machine language and send the scanning signal to the driving IC — connecting the liquid crystal display lead terminal 12, the side of the second flexible printed circuit board 3 connected to the semi-finished liquid crystal display screen 5 to be tested is provided with a third signal line terminal 32, the side of the semi-finished liquid crystal display screen 5 to be tested connected to the second flexible printed circuit board 3 is provided with a fourth signal line terminal 51 adapted to the third signal line terminal 32, the third signal line end 32 and the fourth signal line end 51 are in contact with a connection signal, and the point H is connected with an internal lead of the liquid crystal glass, and the liquid crystal display is driven by a scanning signal to complete the simulation test. The actual signal can be used to detect the semi-finished product of the liquid crystal screen.
It should be noted that, in this embodiment, the image display on the liquid crystal display is implemented by the analog voltage provided by the main control driving IC chip, and the principle is that the software transmits a signal to control the seg/com driving scanning signal to scan line by line, an interface time sequence is set according to the time sequence, sufficient voltage is provided for the liquid crystal display, and then the data to be displayed is controlled to be stored in the internal memory, and the stored data is displayed on the liquid crystal display.
The embodiment of the utility model provides a test system of liquid crystal display, its take the glass of conducting film circuit and bind liquid crystal driver IC chip on the glass of conducting film circuit, the glass of conducting film circuit passes through first flexible printed circuit board with control mainboard electric connection, the glass of conducting film circuit passes through second flexible printed circuit board and the liquid crystal display semi-manufactured goods electric connection that awaits measuring, like this, through the preparation of the glass of taking the conducting film circuit and the liquid crystal driver IC chip is bound on the glass of conducting film circuit, and the glass of conducting film circuit passes through first flexible printed circuit board with control mainboard electric connection, the glass of conducting film circuit passes through second flexible printed circuit board and the liquid crystal display semi-manufactured goods electric connection that awaits measuring, has realized the imitation test, the utility model discloses can contain different modes such as single-point, whole, dot matrix, interlaced, alternate row and scan to adopt software control, can simulate real equipment signal completely and test, thereby accomplish the semi-manufactured goods's of the liquid crystal display that awaits measuring simulation test, and the test precision is high, the black and white LCD screen product of applicable present market mainstream.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (6)
1. A test system of a liquid crystal display screen is characterized by comprising glass with a conductive film circuit, wherein a liquid crystal driving IC chip, a first flexible printed circuit board, a second flexible printed circuit board and a control mainboard are bound on the glass with the conductive film circuit; the glass with the conductive film circuit is electrically connected with the control main board through the first flexible printed circuit board, and the glass with the conductive film circuit is electrically connected with a semi-finished product of the liquid crystal display screen to be tested through the second flexible printed circuit board.
2. The testing system for liquid crystal display panel according to claim 1, wherein the side of the glass with conductive film circuit connected to the first flexible printed circuit board is provided with a driving IC-power supply function control lead terminal, the side of the first flexible printed circuit board connected to the glass with conductive film circuit is provided with a first signal line terminal adapted to the driving IC-power supply function control lead terminal, and the glass with conductive film circuit is electrically connected to the first flexible printed circuit board by the cooperation of the driving IC-power supply function control lead terminal and the first signal line terminal.
3. The testing system for LCD panel of claim 1, wherein the side of the glass with conductive film circuit connected to the second flexible printed circuit board is provided with a driving IC-connected LCD lead terminal, the side of the second flexible printed circuit board connected to the glass with conductive film circuit is provided with a second signal line terminal adapted to the driving IC-connected LCD lead terminal, and the glass with conductive film circuit is electrically connected to the second flexible printed circuit board by the matching of the driving IC-connected LCD lead terminal and the second signal line terminal.
4. The testing system of the liquid crystal display screen according to claim 1, wherein a third signal line end is disposed at a side of the second flexible printed circuit board connected to the liquid crystal display screen semi-finished product to be tested, a fourth signal line end adapted to the third signal line end is disposed at a side of the liquid crystal display screen semi-finished product to be tested connected to the second flexible printed circuit board, and the second flexible printed circuit board is electrically connected to the liquid crystal display screen semi-finished product to be tested through cooperation of the third signal line end and the fourth signal line end.
5. The system of claim 1, wherein a fifth signal line terminal is disposed on a side of the first flexible printed circuit board connected to the control motherboard, a sixth signal line terminal adapted to the fifth signal line terminal is disposed on a side of the control motherboard connected to the first flexible printed circuit board, and the first flexible printed circuit board is electrically connected to the control motherboard through cooperation of the fifth signal line terminal and the sixth signal line terminal.
6. The system for testing a liquid crystal display screen of claim 5, wherein the control main board is further provided with a main control IC, a control switch, a DC power supply and a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661833.0U CN209859586U (en) | 2019-05-10 | 2019-05-10 | Liquid crystal display's test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661833.0U CN209859586U (en) | 2019-05-10 | 2019-05-10 | Liquid crystal display's test system |
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| Publication Number | Publication Date |
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| CN209859586U true CN209859586U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920661833.0U Active CN209859586U (en) | 2019-05-10 | 2019-05-10 | Liquid crystal display's test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111754904A (en) * | 2020-06-19 | 2020-10-09 | 北京瑞荣达电子技术有限公司 | Liquid crystal display panel jam-proof detection device |
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2019
- 2019-05-10 CN CN201920661833.0U patent/CN209859586U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111754904A (en) * | 2020-06-19 | 2020-10-09 | 北京瑞荣达电子技术有限公司 | Liquid crystal display panel jam-proof detection device |
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