CN110174534B

CN110174534B - Test pressure head

Info

Publication number: CN110174534B
Application number: CN201910516259.4A
Authority: CN
Inventors: 灏规旦; 尹浩
Original assignee: Suzhou Hirose Opto Co Ltd
Current assignee: Suzhou Hirose Opto Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2021-11-26
Anticipated expiration: 2039-06-14
Also published as: CN110174534A

Abstract

The invention relates to the technical field of display panel testing, and discloses a testing pressure head which comprises a testing component and a pressing block, wherein the testing component comprises a connecting component and a measuring head component, the measuring head component is arranged on the connecting component, the measuring head component is an FPC (flexible printed circuit) board with a testing conduction part, and a conduction surface of the testing conduction part of the FPC board and a pressing surface of a piece to be tested form an inclined included angle; the pressing block is configured to fix the test assembly and is capable of detecting the pressing height of the test assembly. The conduction surface of the test conduction part of the FPC board and the crimping surface of the to-be-tested piece form an inclined included angle, so that the FPC board can be obliquely cut into the to-be-tested piece to be contacted with the to-be-tested piece, the contact area of a golden finger of the FPC board and a metal contact of the display panel is increased in an inclined contact mode, the contact effect of the golden finger and the metal contact is ensured, and the possibility of floating contact is avoided; through detecting the height that the test assembly pushed down, can accurate control FPC board and the crimping pressure of the piece that awaits measuring, can carry out accurate impedance value's measurement to display panel.

Description

Test pressure head

Technical Field

The invention relates to the technical field of display panel testing, in particular to a testing pressure head.

Background

In the field of display technology, the Organic Light-Emitting Diode (OLED) display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, and very high response speed, and is generally applied to display panels of televisions, mobile phones, tablet computers, and the like. With the increasing control demand of people for electronic devices, display panels with touch functions are receiving more and more attention.

In the production process of the display panel using the OLED technology, the display panel needs to be detected for a plurality of parameters, such as color saturation, impedance value, and the like. The impedance value is an important index for judging whether the display panel is qualified, and the impedance value is the ratio of the voltage value applied to the display panel to the current value introduced.

When the impedance value of the display panel is detected in the prior art, a mode that a pressure head is pressed against the display panel is mainly adopted for testing, and a control signal is generally transmitted into the display panel through an external Circuit such as a Flexible Printed Circuit (FPC), which requires binding (bonding) the Flexible Circuit board and the display panel, that is, a PIN (i.e., a gold finger) on the Flexible Circuit board is bound with a corresponding metal contact (PAD point) on the display panel, so that the signal is transmitted into the display panel from the Flexible Circuit board.

In the process of pressing the pressure head to press the display panel, the contact effect of the golden finger and the metal contact can influence the accuracy of the detected impedance value. When the existing pressure head is used for pressing and connecting a display panel, a golden finger is just opposite to a metal contact to be contacted, the contact area of the golden finger and the metal contact is small or the golden finger and the metal contact are not completely contacted, and the measured impedance value is inaccurate.

In view of the above-mentioned drawbacks, the present designer is actively making research and innovation to create a new testing indenter, so that the indenter has more industrial utility value.

Disclosure of Invention

The invention aims to provide a testing pressure head which can increase the contact area of a golden finger of an FPC board and a metal contact of a display panel and realize accurate measurement of an impedance value of the display panel.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a test indenter, includes test subassembly and briquetting, wherein:

the test assembly comprises a connecting assembly and a measuring head assembly, the measuring head assembly is arranged on the connecting assembly, the measuring head assembly is an FPC board with a test conduction part, and a conduction surface of the test conduction part of the FPC board and a compression joint surface of a piece to be tested form an inclined included angle;

the pressing block is configured to fix the test component and can detect the pressing height of the test component.

The conduction surface of the test conduction part of the FPC board and the crimping surface of the to-be-tested piece form an inclined included angle, namely the test pressure head can enable the FPC board to be obliquely cut into the to-be-tested piece to be contacted with the to-be-tested piece, the contact area of a golden finger of the FPC board and a metal contact of the display panel is increased in an inclined contact mode, meanwhile, the contact effect of the golden finger and the metal contact is ensured, and the possibility of floating contact is avoided; in addition, the pressing height of the testing assembly is detected, so that the pressing pressure of the FPC board and the piece to be tested can be accurately controlled, and accurate impedance value measurement can be performed on the display panel.

As a preferable scheme of the above test indenter, the pressing block includes a first pressing block and a second pressing block, the second pressing block fixes the probe assembly, the second pressing block is connected to the first pressing block and can move relative to the first pressing block, and the first pressing block is connected to a sensor for detecting a displacement of the second pressing block. Through making the relative first briquetting of second briquetting remove to satisfy the displacement volume that the gauge head subassembly needs when the crimping, simultaneously, the inductor can respond to the displacement volume that the second briquetting carried the gauge head subassembly, ensures the crimping effect of FPC board and the piece that awaits measuring.

As a preferable scheme of the above test indenter, a supporting portion for supporting the test assembly is disposed at the top of the second pressing block, and a supporting surface of the supporting portion is an inclined surface. The supporting surface of the supporting part is set to be an inclined surface, so that the FPC board can be obliquely cut into the piece to be tested to be contacted with the piece to be tested.

As a preferable mode of the above test indenter, an inclination angle of the inclined surface with respect to the crimping surface is 10 ° to 40 °. The inclination angle can meet the requirement that the contact area between the golden finger of the FPC board and the metal contact of the display panel is larger.

As a preferable mode of the above test indenter, the connection assembly includes a pressing plate that presses the FPC board against the inclined surface. The pressing plate can prevent the FPC board from moving during crimping, and the crimping accuracy is ensured.

As a preferable scheme of the above test indenter, the pressure plate is magnetically engaged with the inclined surface. The magnetic attraction matching structure is simple and easy to process.

As a preferred version of the above test indenter, the support portion can rest on top of the first pressure block. The top of first briquetting can keep out the supporting part promptly, prevents the supporting part and continues to move, avoids the crimping to cross the head and damage display panel.

As a preferable scheme of the above test indenter, the second pressing block is connected to the first pressing block through a cross ball slide rail. The structure of the crossed ball sliding rail can realize the movement of the second pressing block relative to the first pressing block, and no gap exists between the rail of the crossed ball sliding rail and the sliding block, so that the movement stability of the second pressing block is ensured.

As a preferable scheme of the above test indenter, a return spring is connected between the second pressing block and the first pressing block. By means of the return spring, the second pressing block can return quickly after being pressed.

As a preferable scheme of the above test indenter, an insulating soft cushion is disposed at a position of the pressing block, which is close to the test conduction part of the FPC board. The insulating soft cushion can avoid the damage of the display panel in the crimping process.

The invention has the beneficial effects that: the conduction surface of the test conduction part of the FPC board and the crimping surface of the to-be-tested piece form an inclined included angle, namely the test pressure head can enable the FPC board to be obliquely cut into the to-be-tested piece to be contacted with the to-be-tested piece, the contact area of a golden finger of the FPC board and a metal contact of the display panel is increased in an inclined contact mode, meanwhile, the contact effect of the golden finger and the metal contact is ensured, and the possibility of floating contact is avoided; in addition, the pressing height of the testing assembly is detected, so that the pressing pressure of the FPC board and the piece to be tested can be accurately controlled, and accurate impedance value measurement can be performed on the display panel.

Drawings

FIG. 1 is a schematic diagram of a test indenter configuration provided by an embodiment of the present invention;

FIG. 2 is an exploded view of a test indenter configuration provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the test indenter provided in the embodiment of the present invention with the second pressing block removed.

In the figure: 10-a pressing plate, 20-a measuring head component, 30-a pressing block, 31-a first pressing block, 32-a second pressing block, 33-an inductor, 34-a supporting part, 35-an inclined plane, 36-a crossed ball slide rail, 37-a return spring and 40-an insulating cushion.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, the test pressure head of the present invention is used for testing the crimping impedance of a display panel, and the test pressure head includes a test component and a press block 30, wherein the test component includes a connection component and a probe component 20, the probe component 20 is disposed on the connection component, the probe component 20 is an FPC board having a test conduction part, and a conduction surface of the test conduction part of the FPC board and a crimping surface of a to-be-tested member form an inclined included angle; the pressing block 30 is configured to fix the test assembly and to be able to detect the height of the test assembly pressed down. The conduction surface of the test conduction part of the FPC board and the crimping surface of the to-be-tested piece form an inclined included angle, namely the test pressure head can enable the FPC board to be obliquely cut into the to-be-tested piece to be contacted with the to-be-tested piece, the contact area of a golden finger of the FPC board and a metal contact of the display panel is increased in an inclined contact mode, meanwhile, the contact effect of the golden finger and the metal contact is ensured, and the possibility of floating contact is avoided; in addition, the pressing height of the testing assembly is detected, so that the pressing pressure of the FPC board and the piece to be tested can be accurately controlled, and accurate impedance value measurement can be performed on the display panel.

For the pressing block 30 structure for fixing the test component, in the invention, the pressing block 30 comprises a first pressing block 31 and a second pressing block 32, the second pressing block 32 fixes the probe component, the second pressing block 32 is connected with the first pressing block 31 and can move relative to the first pressing block 31, and the first pressing block 31 is connected with a sensor 33 for detecting the displacement of the second pressing block 32. Through making second briquetting 32 remove first briquetting 31 relatively to satisfy the displacement volume that the gauge head subassembly needs when the crimping, simultaneously, inductor 33 can respond to second briquetting 32 and carry the displacement volume of gauge head subassembly, ensures the crimping effect of FPC board and the piece that awaits measuring. Specifically, the second pressing block 32 is connected with the first pressing block 31 through a crossed ball slide rail 36, and a return spring 37 is connected between the second pressing block 32 and the first pressing block 31. The structure of the crossed ball slide rail 36 can realize the movement of the second press block 32 relative to the first press block 31, and no gap exists between the rail and the slide block of the crossed ball slide rail 36, so that the movement stability of the second press block 32 is ensured; by means of the return spring 37, the second pressure piece 32 can be quickly returned after crimping. For the connection of the return spring 37, the return spring 37 may be fixed to the first presser 31, and the second presser 32 may be connected to the return spring 37.

As for the connection mode of the pressing block 30 and the testing component, the top of the second pressing block 32 is provided with a supporting part 34 for supporting the testing component, and the supporting surface of the supporting part 34 is an inclined surface 35. By providing the support surface of the support portion 34 as the inclined surface 35, the FPC board can be obliquely cut into the device under test to be in contact with the device under test. Preferably, the inclined surface 35 is inclined at an angle of 10 ° to 40 ° with respect to the crimping surface. The inclination angle can meet the requirement that the contact area between the golden finger of the FPC board and the metal contact of the display panel is larger. In addition, the connecting assembly comprises a pressing plate 10 for tightly pressing the FPC board on the inclined surface 35, and the pressing plate 10 can prevent the FPC board from moving during crimping, so that the crimping accuracy is ensured. For the fixation of the pressing plate 10, in the present invention, the pressing plate 10 is magnetically engaged with the inclined surface 35. The magnetic attraction matching structure is simple and easy to process. For example, the platen 10 can be fixed by mounting a plurality of magnets for attracting the platen 10 on the inclined surface 35.

In order to limit the displacement of the support part 34 carrying the FPC board, the support part 34 in the present invention can rest on top of the first presser piece 31. That is, the top of the first pressing block 31 can abut against the supporting portion 34, so as to prevent the supporting portion 34 from moving continuously, and prevent the display panel from being damaged due to over-head pressure welding.

In a preferred embodiment of the present invention, the insulating soft pad 40 is provided at a portion of the press block 30 close to the test conduction portion of the FPC board. The insulating cushion 40 is made of polyurethane, and the display panel can be prevented from being damaged in the crimping process by the insulating cushion 40.

In conclusion, the testing pressure head can increase the contact area between the golden finger of the FPC board and the metal contact of the display panel, and realize accurate measurement of the impedance value of the display panel.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. A test indenter, comprising a test assembly and a press block (30), wherein:

the testing component comprises a connecting component and a measuring head component (20), the measuring head component (20) is arranged on the connecting component, the measuring head component (20) is an FPC board with a testing conduction part, and a conduction surface of the testing conduction part of the FPC board and a compression joint surface of a piece to be tested form an inclined included angle;

the pressing block (30) comprises a first pressing block (31) and a second pressing block (32), the second pressing block (32) fixes the measuring head assembly, the second pressing block (32) is connected with the first pressing block (31) and can move relative to the first pressing block (31), the first pressing block (31) is connected with a sensor (33) for detecting the displacement of the second pressing block (32), the pressing block (30) is configured to fix the test assembly and can detect the downward pressing height of the test assembly, a supporting part (34) for supporting the test assembly is arranged at the top of the second pressing block (32), and a supporting surface of the supporting part (34) is an inclined surface (35) so that the FPC board is obliquely cut into the to-be-tested piece to be contacted with the to-be-tested piece;

the inclined plane (35) has an inclination angle of 10-40 degrees relative to the crimping surface.

2. Test indenter according to claim 1, characterized in that the connection assembly comprises a pressure plate (10) pressing the FPC board against the ramp (35).

3. A test indenter according to claim 2, characterized in that the pressure plate (10) is in magnetic attraction engagement with the ramp (35).

4. Test indenter according to claim 1, characterized in that the support (34) can rest on top of the first pressure piece (31).

5. Test indenter according to claim 1, characterized in that the second pressure piece (32) is connected to the first pressure piece (31) by means of a cross ball slide (36).

6. Test indenter according to claim 5, characterized in that a return spring (37) is connected between the second pressure piece (32) and the first pressure piece (31).

7. A test indenter as claimed in claim 1, characterized in that the press block (30) is provided with an insulating cushion (40) near the test vias of the FPC board.