A conduction tool suitable for large-size display panel point screen test

Abstract

The present invention discloses a conduction tooling suitable for large-size display panel point screen test, which includes a base, a panel positioning structure, a signal transfer structure and a vertical crimping structure are arranged on the base, the signal transfer structure includes a PCB and an FPC, the vertical crimping structure includes a guide structure, a pressure head and a power mechanism vertically arranged on the base, and a gold finger for conducting the display panel is arranged on the FPC, and the position of the pressure head corresponds to the position of the gold finger and is located above the gold finger. The present invention has a simple structure and is easy to use. It is suitable for large-size display panels or display panels with a large terminal spacing for connecting FPC. It directly realizes the connection between the gold finger on the FPC and the conduction terminal on the display panel by manual operation, and realizes the crimping conduction between the FPC and the conduction terminal through the vertical crimping structure, thereby effectively eliminating the probe module, saving the manufacturing and assembly costs, and improving the efficiency of the large-size display panel point screen test.

Description

Technical Field

[0001] The present invention relates to a conduction device for dot screen testing, which belongs to the technical field of display panel testing, and in particular to a conduction tooling suitable for dot screen testing of large-size display panels. Background Art

[0002] With the continuous advancement of science and technology, display panels are developing rapidly in today's society and are widely used in mobile phones, computers, televisions and other fields. In order to ensure the service life of mobile phone and computer screens, a series of performance index tests need to be performed on the display panel. The test method is usually to install the display panel in a test fixture and use the conduction tooling to conduct the display panel to complete the performance test. Only when the display panel meets various test indicators can the LCD product be determined to be qualified.

[0003] At present, the conduction tooling for display panels generally includes three major components: a panel positioning structure, a signal transfer structure and a vertical crimping structure. The signal transfer structure is composed of an FPC and a PCB. The vertical crimping structure is composed of a vertical guide structure, a pressure head and a power mechanism. A probe module is installed on the pressure head. The FPC is connected to the probe module. The pressure head presses down to drive the probe module to downwardly connect the display panel located in the panel positioning structure. The above structure is shown in CN207472538U and CN207517340U; the above conduction tooling is developed for small-screen display panels. Because the connection terminal spacing for conducting the FPC on the small-screen display panel is small, in order to ensure the conduction accuracy, a probe module must be used to achieve conduction. The manufacturing and assembly accuracy of the probe module is extremely high, so the manufacturing cost of the above conduction tooling is relatively high. For large-screen display panels such as TV screens, since the connection terminal spacing for conducting the FPC on the large-screen display panel is relatively large, manual docking of the FPC can be achieved, so the use of the above conduction tooling will inevitably cause a waste of resources. Summary of the invention

[0004] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a conduction tooling suitable for dot screen testing of large-size display panels, which not only has a simple structure but also can conveniently achieve conduction of large-size display panels.

[0005] In order to solve the above technical problems, the present invention adopts a conduction tooling suitable for dot screen testing of large-size display panels, which includes a base, on which a panel positioning structure, a signal switching structure and a vertical crimping structure are arranged, the signal switching structure includes a PCB arranged on the base and an FPC electrically connected to the PCB, the vertical crimping structure includes a guide structure vertically arranged on the base, a pressure head connected to the guide structure and a power mechanism for driving the pressure head to translate along the guide structure, the FPC is provided with a gold finger for conducting the display panel, the position of the pressure head corresponds to the position of the gold finger and is located above the gold finger.

[0006] In a preferred embodiment of the present invention, the power mechanism includes a support block and a toggle clamp, the support block is fixedly connected to the base, the toggle clamp is fixedly connected to the support block, and the movable end of the toggle clamp faces the pressure head.

[0007] In a preferred embodiment of the present invention, the movable end of the toggle clamp is fixedly connected to a pressure plate, a plurality of threaded holes are processed on the pressure plate, and a plunger is threadedly connected in each threaded hole.

[0008] In a preferred embodiment of the present invention, there are two support blocks, which are symmetrically arranged on both sides of the FPC, and one of the toggle clamps is fixedly connected to each support block.

[0009] In a preferred embodiment of the present invention, a silicone strip is provided on the lower end surface of the pressure head, and the position of the silicone strip corresponds to the position of the gold finger.

[0010] In a preferred embodiment of the present invention, the pressure head includes a pressure head pad and a pressure head fixing plate, the pressure head fixing plate is connected to the guide structure, and the pressure head pad is fixedly connected above the pressure head fixing plate.

[0011] In a preferred embodiment of the present invention, the panel positioning structure includes a panel positioning block and a vacuum suction, and the panel positioning block includes a long side positioning block and a wide side positioning block connected to the base.

[0012] In a preferred embodiment of the present invention, the base is provided with a threaded hole for connecting with the panel positioning block, and the panel positioning block is provided with a waist-shaped hole for connecting with the base.

[0013] In a preferred embodiment of the present invention, a positioning light source is provided on the base, and the positioning light source is located below the gold finger.

[0014] In a preferred embodiment of the present invention, the guide structure is a linear slide rail or a guide rod, and the pressure head is connected to a return spring.

[0015] The gold finger in the present invention refers to the common name for the edge joint that connects the FPC and the display panel to each other. It itself can be regarded as a part of the FPC. It is extended from one end of the copper foil layer of the FPC. It is used to connect the PIN corner of the conductive display panel. Its structure can be seen in CN201022241Y, CN205912335U, etc.

[0016] The beneficial effects of the present invention are as follows: the present invention has a simple structure and is easy to use. It is suitable for large-size display panels or display panels with a large terminal spacing for connecting FPC. It directly realizes the docking of the gold fingers on the FPC with the conductive terminals on the display panel manually, and realizes the crimping and conduction between the FPC and the conductive terminals through a vertical crimping structure, thereby effectively eliminating the need for a probe module, saving manufacturing and assembly costs, and improving the efficiency of dot screen testing of large-size display panels; the present invention designs the power mechanism as a manual operation mode of a support block in conjunction with a toggle clamp, which not only saves the manufacturing cost of the conductive tooling, but also makes the modular design more conducive to installation and replacement; further, the present invention designs a pressure plate with an adjustable plunger at the movable end of the toggle clamp, thereby realizing the adjustment of the downward pressing stroke of the pressure head and improving the conductive tooling Universality; further, the present invention improves the stability of the pressing block through the structure of the double elbow-jointed clamp; further, the present invention arranges a silicone strip on the lower end surface of the pressure head, which not only makes the pressure head have a buffer force when pressing the FPC, but also prevents the FPC from being damaged; further, the present invention designs the pressure head as a split structure of a pressure head pad and a pressure head fixing plate made of stainless steel material, thereby effectively avoiding the impact of the pressure head fixing plate when the elbow-jointed clamp is pressed down, protecting the pressure head fixing plate and avoiding excessive wear thereof; further, the present invention designs the panel positioning structure as a long side positioning block, a wide side positioning block and a vacuum suction structure, thereby facilitating the positioning and fixing of a large-size display panel; further, the present invention arranges a positioning light source on the base, thereby facilitating the connection between the gold finger of the FPC and the conductive terminal on the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a conduction tooling applicable to a large-size display panel dot screen test according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of a conduction tooling applicable to a large-size display panel dot screen test according to an embodiment of the present invention;

[0019] Figure 3 It is a cross-sectional view of a floating fixture in a conduction fixture suitable for a dot screen test of a large-size display panel according to an embodiment of the present invention;

[0020] Figure 4This is a front view of an upper flip cover of a conduction tooling suitable for a large-size display panel dot screen test according to an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of a crimped spring piece on a needle mold in a conduction tooling suitable for dot screen testing of a large-size display panel according to an embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of a crimped spring piece on a needle mold in a conduction tooling suitable for dot screen testing of a large-size display panel according to an embodiment of the present invention;

[0023] In the figure: 1-base; 2-panel positioning structure; 3-signal transfer structure; 4-vertical crimping structure; 5-power mechanism; 6-pressing plate; 7-silicone pressure strip; 8-reset spring; 9-plunger; 10-guide structure; 11-pressing head; 12-positioning light source; 2.1-panel positioning block; 2.2-vacuum suction; 3.1-FPC; 3.2-PCB; 5.1-support block; 5.2-elbow clamp; 11.1-pressing head pad; 11.2-pressing head fixing plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] It can be seen from the attached drawings of the specification that a conductive tool suitable for dot screen testing of large-size display panels includes a base 1, on which a panel positioning structure 2, a signal transfer structure 3 and a vertical crimping structure 4 are provided, and the vertical crimping structure 4 is located between the panel positioning structure 2 and the signal transfer structure 3.

[0026] The panel positioning structure 2 includes a panel positioning block 2.1 and a vacuum suction 2.2. The panel positioning block 2.1 includes a long side positioning block and a wide side positioning block connected to the base 1. The base 1 is provided with a threaded hole for connecting the panel positioning block 2.1. The panel positioning block 2.1 is provided with a waist-shaped hole for connecting the base 1. The positions of the long side positioning block and the wide side positioning block are adjusted by the cooperation of the above-mentioned threaded holes and the waist-shaped holes. The present invention only designs one long side positioning block and one wide side positioning block to cooperate and position the long side and wide side of the large-size display panel, which not only facilitates the installation and positioning of the large-size display panel, but also facilitates its replacement after the detection is completed. It should be pointed out that the panel positioning structure 2 of the present invention is not limited to the above-mentioned embodiments. As long as various structures that can be used to position the display panel belong to the protection scope of the present invention.

[0027] The signal transfer structure 3 includes a PCB3.2 arranged on the base 1 and an FPC3.1 electrically connected to the PCB3.2. A gold finger for conducting the display panel is arranged on the FPC3.1. The position of the gold finger corresponds to the position of the display panel conduction terminal installed on the panel positioning structure 2. At this time, since the spacing between the display panel conduction terminals is large and it is convenient for manual direct alignment, the FPC3.1 and the display panel conduction terminals are manually aligned.

[0028] The vertical crimping structure 4 includes a guide structure 10 vertically arranged on the base 1, a pressure head 11 connected to the guide structure 10, and a power mechanism 5 for driving the pressure head 11 to translate along the guide structure 10. The position of the pressure head 11 corresponds to the position of the gold finger and is located above the gold finger. The power mechanism 5 can be a manual crimping structure or an automatic crimping structure. The present invention takes the manual crimping structure as an embodiment, and the detailed structure description is as follows:

[0029] The power mechanism 5 includes a support block 5.1 and a toggle clamp 5.2, the support block 5.1 is fixedly connected to the base 1, the toggle clamp 5.2 is fixedly connected to the support block 5.1, and the movable end of the toggle clamp 5.2 faces the pressure head 11. Preferably, there are two support blocks 5.1, the two support blocks 5.1 are symmetrically arranged on both sides of the FPC 3.1, and each support block 5.1 is fixedly connected to a toggle clamp 5.2.

[0030] Preferably, the movable end of the toggle clamp 5.2 is fixedly connected with a pressing plate 6, and a plurality of threaded holes are processed on the pressing plate 6, and a plunger 9 is threadedly connected in each threaded hole.

[0031] Preferably, a silicone strip 7 is provided on the lower end surface of the pressing head 11 , and the position of the silicone strip 7 corresponds to the position of the gold finger.

[0032] Preferably, the pressure head 11 comprises a pressure head pad 11.1 and a pressure head fixing plate 11.2, the pressure head fixing plate 11.2 is connected to the guide structure 10, and the pressure head pad 11.1 is fixedly connected above the pressure head fixing plate 11.2.

[0033] Preferably, a positioning light source 12 is provided on the base 1, and the positioning light source 12 is located below the gold finger.

[0034] Preferably, the guide structure 10 is a linear slide rail or a guide rod, and the pressure head 11 is connected to a return spring 8 .

[0035] The large-size display panel of the present invention refers to a display panel on which the connection terminals for connecting the FPC are spaced relatively large, and the spacing is sufficient for the operator to align the two with the naked eye. Generally, the size of the display panel is larger than 8 inches.

[0036] The operation steps of the present invention are as follows:

[0037] 1. Place the base on the work desk, and the operator takes the display panel to be tested and places it at the vacuum suction position; the adjustable positioning block can be adjusted according to screens of different sizes and is compatible with a variety of products. At the same time, the positioning block can realize the rapid positioning of the screen to be tested; the vacuum suction will firmly adsorb and fix the display panel, and the positioning light source will work. The light will pass through the transparent display panel, which can help the operator to quickly align the FPC;

[0038] 2. After positioning is completed, the operator presses down the elbow clamp, and the elbow clamp drives the plunger to press against the pressure head pad to complete the pressing action. Multiple plungers can realize synchronous pressing of the pressure head, effectively reducing the poor crimping caused by uneven crimping. The pressure head pad presses down the pressure head fixing plate under the guidance of the linear guide rail, and the silicone pressure strip fixed on the pressure head fixing plate tightly presses the FPC;

[0039] 3. Perform a point screen test. After the point screen test is completed, disconnect the FPC from the connector, reset the elbow clamp, and drive the plunger to rise. At this time, the pressure head has two short installed tension springs. Under the action of tension, it rises along the linear guide direction to complete the reset action of the plunger and the pressure head. Take out the screen that has completed the point screen test, and the entire test process is completed.

[0040] It should be understood that the above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A conduction tool suitable for large-size display panel point screen test, characterized in that: The invention is suitable for display panels of large sizes or display panels with large terminal spacing for connecting FPCs. The invention directly achieves the docking of the gold fingers on the FPC with the conducting terminals on the display panel by manual operation, and realizes the crimping and conducting of the FPC and the conducting terminals by vertical crimping structure. The invention comprises a base (1). The base (1) is provided with a panel positioning structure (2), a signal transfer structure (3) and a vertical crimping structure (4). The signal transfer structure (3) comprises a PCB (3.2) arranged on the base (1) and an FPC (3.1) electrically connected to the PCB (3.2). The vertical crimping structure (4) comprises a guide structure (10) arranged vertically on the base (1), a pressure head (11) connected to the guide structure (10) and a power mechanism (5) for driving the pressure head (11) to translate along the guide structure (10). The FPC (3.1) is provided with gold fingers for conducting the display panel. The position of the pressure head (11) is controlled by the pressure head (11). The position corresponds to the position of the gold finger and is located above the gold finger; the power mechanism (5) comprises a support block (5.1) and a toggle clamp (5.2), the support block (5.1) is fixedly connected to the base (1), the toggle clamp (5.2) is fixedly connected to the support block (5.1), and the movable end of the toggle clamp (5.2) faces the pressure head (11); the movable end of the toggle clamp (5.2) is fixedly connected to a pressure plate (6); the panel positioning The structure (2) comprises a panel positioning block (2.1) and a vacuum suction (2.2); the pressure head (11) comprises a pressure head pad (11.1) and a pressure head fixing plate (11.2), the pressure head fixing plate (11.2) is connected to the guide structure (10), and the pressure head pad (11.1) is fixedly connected to the top of the pressure head fixing plate (11.2); the movable end of the elbow-type clamp is fixedly connected to a pressure plate, and a plurality of threaded holes are machined on the pressure plate, and a plunger is threadedly connected to each threaded hole; Operation step 1: Place the base on the work desk, and the operator takes the display panel to be tested and places it at the vacuum suction position; the positioning block can be adjusted according to screens of different sizes and is compatible with a variety of products. At the same time, the positioning block can realize the rapid positioning of the screen to be tested; the vacuum suction adsorbs and fixes the display panel firmly; Operation step 2. After positioning is completed, the operator presses down the elbow clamp, and the elbow clamp drives the plunger to press against the pressure head pad to complete the pressing action. The pressure head pad presses down the pressure head fixing plate under the guidance of the linear guide rail, and the silicone pressure strip fixed on the pressure head fixing plate is tightly pressed against the FPC; Operation step 3. Perform a point screen test. After the point screen test is completed, disconnect the FPC from the connector and reset the elbow clamp to rise. At this time, the pressure head rises along the linear guide under the action of tension, completing the reset action of the plunger and the pressure head. Take out the screen that has completed the point screen test, and the entire test process is completed.

2. According to claim 1, a conduction tool suitable for large-size display panel point screen test, characterized in that: There are two support blocks (5.1), which are symmetrically arranged on both sides of the FPC (3.1), and each support block (5.1) is fixedly connected to one of the toggle clamps (5.2).

3. According to claim 1, a conduction tool suitable for large-size display panel point screen test, characterized in that: A silicone strip (7) is provided on the lower end surface of the pressure head (11), and the position of the silicone strip (7) corresponds to the position of the gold finger.

4. According to claim 1, a conduction tool suitable for large-size display panel point screen test, characterized in that: The panel positioning block (2.1) comprises a long side positioning block and a wide side positioning block connected to the base (1).

5. The conduction fixture suitable for large-size display panel point screen test according to claim 4, characterized in that: The base (1) is provided with a threaded hole for connecting to a panel positioning block (2.1), and the panel positioning block (2.1) is provided with a waist-shaped hole for connecting to the base (1).

6. The conduction fixture suitable for large-size display panel dot screen testing according to claim 1, characterized in that: A positioning light source (12) is provided on the base (1), and the positioning light source (12) is located below the gold finger.

7. The conduction fixture suitable for large-size display panel point screen test according to claim 1, characterized in that: The guide structure (10) is a linear slide rail or a guide rod, and the pressure head (11) is connected to a return spring (8).

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