Test board and test machine for LCD (Liquid Crystal Display) with ITO (Indium Tin Oxide) wires connected end to end

Abstract

The utility model provides a test board and a test machine for an LCD (Liquid Crystal Display) with end-to-end ITO (Indium Tin Oxide) wires, which belong to the technical field of LCD testing, the test board for the LCD comprises a substrate, a plurality of first pins are arranged on the substrate, a plurality of second pins are arranged on the LCD, the second pins correspond to the first pins, and the first pins are connected with the second pins. A first test circuit unit and a second test circuit unit are arranged in the substrate. A processor and a plurality of display screen interfaces are also arranged in the substrate; and the processor is electrically connected with the first test circuit unit, the second test circuit unit and the display screen interfaces. According to the test board, the LCD is detected through different test circuit units, detection of all items of the LCD can be completed by implementing a test once in use, operation is simple and convenient, and improvement of production efficiency and product quality is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of LCD testing, in particular to a test board and a test machine for LCD with ITO wiring connected end to end. Background Art

[0002] With the development of technology, LCD has been widely used in various fields such as consumer electronics, industrial equipment, experimental instruments, medical-related, and automotive accessories. At present, LCDs are basically customized. Some LCDs with larger sizes and more displayed characters will have a special end-to-end connection design for the ITO lines of the LCD to prevent the display light and dark problems caused by excessive impedance of some ITO lines. That is, under normal circumstances, only one external lead is pulled to the LCD terminal for an ITO line, but for products with excessive impedance of the ITO line, one external lead will be pulled to the LCD terminal at the beginning and end of the line, thereby improving the driving ability of the LCD and avoiding the problem of LCD display light and dark.

[0003] Testing LCD screens is a key step to ensure their quality and performance. For existing LCD products with ITO lines connected end to end, conventional testing can only perform single-line inspections. During the test, in order to detect all the broken wire defects on the ITO end-to-end lines, two test boards need to be made, one connected to the head end of the ITO end-to-end line, and the other connected to the tail end. This method requires two rounds of testing, which affects efficiency and increases labor costs.

[0004] Therefore, it is necessary to improve the existing test method of LCD products with ITO connected end to end to overcome the defects of the prior art. Utility Model Content

[0005] In order to overcome the problems existing in the related art, one of the purposes of the utility model is to provide a test board for LCD with ITO traces connected end to end. The test board detects the LCD through different test circuit units. When used, one test can complete the detection of all items of the LCD. The operation is simple and convenient, which helps to improve production efficiency and product quality.

[0006] An LCD test board with ITO traces connected end to end, comprising:

[0007] A substrate, wherein a plurality of first pins are disposed on the substrate, and a plurality of second pins are disposed on the LCD, wherein the second pins correspond to the first pins;

[0008] The substrate is provided with a first test circuit unit and a second test circuit unit;

[0009] A processor and a plurality of display screen interfaces are also provided in the substrate, and the processor is electrically connected to the first test circuit unit, the second test circuit unit and the display screen interface.

[0010] In a preferred technical solution of the utility model, a head connector and a tail connector are also provided on the substrate, and both the head connector and the tail connector are electrically connected to the processor.

[0011] In the preferred technical solution of the utility model,

[0012] The first test circuit unit includes a signal generator and a signal receiver, wherein the signal generator is electrically connected to the LCD and used to generate a test signal; the signal receiver is electrically connected to the LCD and used to receive a feedback signal from the LCD screen;

[0013] The signal receiver and the signal generator are both electrically connected to the processor.

[0014] In a preferred technical solution of the utility model, an adjusting knob is further provided on the substrate, and the adjusting knob is electrically connected to the processor for controlling the test process.

[0015] In a preferred technical solution of the present utility model, a protection circuit unit is further provided in the substrate, and the protection circuit unit is electrically connected to the processor.

[0016] In a preferred technical solution of the utility model, it also includes a fixing plate, which is arranged on the substrate, and the fixing plate is provided with pin through holes, and the pin through holes correspond to the second pins.

[0017] The second purpose of the utility model is to provide a testing machine, which includes the above-mentioned ITO wiring end-to-end LCD testing board; it also includes a machine body, a machine table is arranged on the machine body, a mounting position is arranged on the machine table, and the substrate is clamped in the mounting position.

[0018] In a preferred technical solution of the utility model, a clamping block is provided on the edge of the installation position, and the clamping block is connected to the machine platform via an elastic connecting rod, and the elastic connecting rod is rotatably connected to the machine platform.

[0019] In a preferred technical solution of the utility model, a controller, a buzzer, an indicator light and a display screen are also provided on the body, and the buzzer, the indicator light and the display screen are all electrically connected to the controller, and the controller is electrically connected to the processor.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides an LCD test board with ITO wiring connected end to end. The LCD includes a body and a metal pin. The LCD test board includes a substrate. A plurality of first pins are arranged on the substrate. A plurality of second pins are arranged on the LCD, wherein the second pins correspond to the first pins. A first test circuit unit and a second test circuit unit are arranged in the substrate. The test board integrates different test circuit units so that various tests of the LCD can be completed in one go without replacing or adjusting the test equipment. This design significantly improves the test efficiency and reduces the production time and cost. A processor and a plurality of display screen interfaces are also arranged in the substrate. The processor is electrically connected to the first test circuit unit, the second test circuit unit and the display screen interface. The test board can complete the detection of multiple items of the LCD in one go, greatly simplifies the operation process, reduces the difficulty of operation, and makes the test process more convenient. The processor is electrically connected to the plurality of display screen interfaces so that the test board can adapt to the testing of LCD products of different types and specifications, thereby enhancing the flexibility and application scope of the test.

[0022] The present application also provides a testing machine including the above-mentioned ITO traces connected end to end for LCD testing board, the testing machine can complete multiple items of LCD testing in one test, thereby improving LCD testing efficiency, reducing production costs, and ensuring the quality of LCD products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an LCD test board with ITO traces connected end to end provided in an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the cooperation between the base plate and the fixing plate provided in the embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of the cooperation between the first test circuit unit and the processor provided in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of a testing machine provided in an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1. Base plate; 11. First test circuit unit; 111. Signal generator; 121. Signal receiver; 12. Second test circuit unit; 13. Head connector; 14. Processor; 15. Adjustment knob; 16. Protection circuit unit; 17. Tail connector; 2. Fixing plate; 21. Pin perforation; 100. Machine body; 110. Machine table; 120. Elastic connecting rod; 130. Card block; 140. Display screen; 150. Indicator light; 160. Buzzer. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] Testing LCD screens is a key step to ensure their quality and performance. For existing LCD products with ITO lines connected end to end, conventional testing can only perform single-line inspections. During the test, in order to detect all the broken wire defects on the ITO end-to-end lines, two test boards need to be made, one connected to the head end of the ITO end-to-end line, and the other connected to the tail end. This method requires two rounds of testing, which affects efficiency and increases labor costs.

[0033] Example 1

[0034] like Figure 1-Figure 3As shown, this embodiment provides an LCD test board with ITO traces connected end to end, the LCD includes a body and metal pins, the LCD test board includes a substrate 1, a plurality of first pins are arranged on the substrate 1, a plurality of second pins are arranged on the LCD, wherein the second pins correspond to the first pins, and a first test circuit unit 11 and a second test circuit unit 12 are arranged in the substrate 1. The second pins correspond to the first pins, and during use, the pins of the LCD are aligned with the corresponding pins on the test board. And when connecting the LCD and the test board, ensure that the action is gentle when inserting the connecting wire to avoid damaging the pins or interfaces.

[0035] The test board integrates different test circuit units so that various tests of LCD can be completed in one go without replacing or adjusting the test equipment. This design significantly improves the test efficiency and reduces production time and cost. The substrate 1 is also provided with a processor 14 and multiple display screen 140 interfaces, and the processor 14 is electrically connected to the first test circuit unit 11, the second test circuit unit 12 and the display screen 140 interface. The test board can complete multiple project tests of LCD in one test, which greatly simplifies the operation process, reduces the difficulty of operation, and makes the test process more convenient. And by electrically connecting the processor 14 with the multiple display screen 140 interfaces, the test board can adapt to the testing of LCD products of different types and specifications, thereby enhancing the flexibility and scope of application of the test.

[0036] In actual application, the first test circuit unit 11 is used to complete the function test items of the LCD for conventional items. For example, the test items may include brightness and contrast test, rendering test, response time test, color gamut test, etc. The first test circuit unit 11 is used to detect whether there is a disconnection / line failure problem in the LCD end-to-end connection line.

[0037] Furthermore, a first connector 13 and a tail connector 17 are also provided on the substrate 1, and the first connector 13 and the tail connector 17 are both electrically connected to the processor 14. Through the design of the first connector 13 and the tail connector 17, the test board can easily achieve connection with other test equipment or systems. This design not only enhances the scalability of the test board, but also makes it possible to connect multiple test boards in series when necessary, thereby meeting larger-scale testing needs. In actual applications, the first connector 13 is used to connect to the tail connector 17 of the previous test board, and the tail connector 17 is used to connect to the first connector 13 of the next test board.

[0038] Further, the first test circuit unit 11 includes a signal generator 111 and a signal receiver 121, the signal generator 111 is electrically connected to the LCD and used to generate a test signal; the signal receiver 121 is electrically connected to the LCD and used to receive a feedback signal from the LCD screen;

[0039] The signal receiver 121 and the signal generator 111 are both electrically connected to the processor 14 .

[0040] The first connector 13 is an important interface on the test board, which is responsible for transmitting data signals. These data signals may include test instructions, configuration parameters, and real-time test data, etc., to ensure smooth communication between the test board and the LCD screen or other test equipment. The tail connector 17 is similar to the first connector 13 and is also used for data transmission. It can receive feedback data from the LCD screen or other devices so that the processor 14 can analyze and process it.

[0041] Furthermore, an adjusting knob 15 is also provided on the substrate 1 , and the adjusting knob 15 is electrically connected to the processor 14 for controlling the test process.

[0042] By adding the adjustment knob 15, the tester can flexibly adjust the test parameters during the test according to actual needs. This design significantly enhances the flexibility and adjustability of the test, making the test process more in line with actual scenarios and needs. The introduction of the adjustment knob 15 enables the tester to finely control the test process, which is expected to improve the precision and accuracy of the test. By fine-tuning the knob, the LCD performance under different conditions can be simulated more accurately, thereby more comprehensively evaluating the quality and reliability of the LCD.

[0043] Furthermore, a protection circuit unit 16 is also provided in the substrate 1 , and the protection circuit unit 16 is electrically connected to the processor 14 .

[0044] The introduction of the protection circuit unit 16 can improve the safety performance of the test board. During the test process, if there is excessive current, abnormal voltage or other potential risks, the protection circuit unit 16 can respond quickly, cut off the power supply or take other necessary protection measures, thereby preventing equipment damage or more serious safety accidents.

[0045] Specifically, the protection circuit unit 16 may include a series-connected overcurrent protection device for automatically increasing resistance when the current exceeds a set threshold, thereby limiting the current and protecting the circuit from damage caused by large current; a parallel-connected ESD protection device for directing electrostatic discharge to the ground line to prevent static electricity from damaging the LCD; and a voltage regulator to ensure the stability of the output voltage and avoid damage caused by voltage fluctuations.

[0046] Furthermore, a fixing plate 2 is included, the fixing plate 2 is arranged on the substrate 1, and a pin through hole 21 is arranged on the fixing plate 2, and the pin through hole 21 corresponds to the second pin. The fixing plate 2 is used to carry the LCD, so that the LCD can be stably fixed on the test board to ensure the stability and accuracy of the test process.

[0047] Example 2

[0048] like Figure 4 As shown, this embodiment provides a test machine, which includes the above-mentioned ITO wiring end-to-end connected LCD test board; it also includes a body 100, a machine table 110 is arranged on the body 100, and a mounting position is arranged on the machine table 110, and the substrate 1 is clamped in the mounting position.

[0049] Furthermore, a clamping block 130 is provided at the edge of the installation position, and the clamping block 130 is connected to the machine 110 through an elastic connecting rod 120, and the elastic connecting rod 120 is rotatably connected to the machine 110. The clamping block 130 is used to clamp the substrate 1 on the machine 110. In actual applications, the clamping blocks 130 can be made of rubber, and these clamping blocks 130 are connected to the machine 110 through the elastic connecting rod 120, and the elastic connecting rod 120 is rotatably connected to the machine 110. Such a design not only facilitates the installation and removal of the substrate 1, but also provides necessary buffering and stability during the test process.

[0050] Furthermore, the body 100 is also provided with a controller, a buzzer 160 , an indicator light 150 and a display screen 140 . The buzzer 160 , the indicator light 150 and the display screen 140 are all electrically connected to the controller, and the controller is electrically connected to the processor 14 .

[0051] During the test, if the ITO end-to-end connection line of the tested LCD is broken / not connected, the test machine will issue a bad alarm, emit a buzzer, the indicator light 150 flashes, and the display screen 140 prompts that the parallel test is open. The tester will remove the defective product according to the machine alarm prompt. If the buzzer 160, the indicator light 150 and the display screen 140 have no alarm abnormalities, it means that the ITO end-to-end connection line is normal.

[0052] The tester can complete multiple LCD test items in one test, thereby improving LCD test efficiency, reducing production costs, and ensuring the quality of LCD products.

[0053] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An LCD test board with ITO traces connected end to end, characterized in that: include: A substrate (1), wherein a plurality of first pins are arranged on the substrate (1), and a plurality of second pins are arranged on the LCD, wherein the second pins correspond to the first pins; The substrate (1) is provided with a first test circuit unit (11) and a second test circuit unit (12); The substrate (1) is also provided with a processor (14) and a plurality of display screen (140) interfaces, and the processor (14) is electrically connected to the first test circuit unit (11), the second test circuit unit (12) and the display screen (140) interface.

2. The LCD test board with ITO wiring connected end to end according to claim 1, characterized in that: A head connector (13) and a tail connector (17) are also provided on the substrate (1); the head connector (13) and the tail connector (17) are both electrically connected to the processor (14).

3. The LCD test board with ITO wiring connected end to end according to claim 2, characterized in that: The first test circuit unit (11) comprises a signal generator (111) and a signal receiver (121), wherein the signal generator (111) is electrically connected to the LCD and is used to generate a test signal; and the signal receiver (121) is electrically connected to the LCD and is used to receive a feedback signal from the LCD screen; The signal receiver (121) and the signal generator (111) are both electrically connected to the processor (14).

4. The LCD test board with ITO wiring connected end to end according to claim 1, characterized in that: The substrate (1) is also provided with an adjusting knob (15), and the adjusting knob (15) is electrically connected to the processor (14) and is used to control the test process.

5. The LCD test board with ITO wiring connected end to end according to claim 1, characterized in that: A protection circuit unit (16) is also provided in the substrate (1), and the protection circuit unit (16) is electrically connected to the processor (14).

6. The LCD test board with ITO traces connected end to end according to any one of claims 1 to 5, characterized in that: It also comprises a fixing plate (2), wherein the fixing plate (2) is arranged on the substrate (1), and the fixing plate (2) is provided with a pin through-hole (21), wherein the pin through-hole (21) corresponds to the second pin.

7. A testing machine, characterized in that: The invention comprises an LCD test board with end-to-end ITO wiring as claimed in any one of claims 1 to 6; and also comprises a body (100), a platform (110) being arranged on the body (100), a mounting position being arranged on the platform (110), and the substrate (1) being snap-fitted into the mounting position.

8. The testing machine according to claim 7, characterized in that: A clamping block (130) is provided at the edge of the installation position, and the clamping block (130) is connected to the machine platform (110) via an elastic connecting rod (120), and the elastic connecting rod (120) is rotatably connected to the machine platform (110).

9. The testing machine according to claim 8, characterized in that: The machine body (100) is also provided with a controller, a buzzer (160), an indicator light (150) and a display screen (140); the buzzer (160), the indicator light (150) and the display screen (140) are all electrically connected to the controller, and the controller is electrically connected to the processor (14).

Images