A test device for a display panel and its test method

Abstract

The present invention provides a test device for a display panel and a test method thereof. A lighting mechanism is arranged on a workbench for lighting the panel. A light-shielding plate is slidably mounted on the workbench and is located above the panel. A plurality of light-shielding sheets arranged in a grid-like and closely spaced manner are laid on the light-shielding plate. A sheet moving mechanism is used to remove some of the light-shielding sheets on the light-shielding plate to form a plurality of measurement points spaced along the vertical and horizontal directions on the light-shielding plate. The light emitted by the panel forms a light spot after passing through the measurement points. A light measurement mechanism is used to measure the brightness uniformity of the panel. The light measurement mechanism includes an illuminance meter, an XY-axis slide table, and an arithmetic unit. The XY-axis slide table drives the illuminance meter to move within the XY coordinate system plane. The arithmetic unit is used to store the light intensity values above the measurement points and calculate the uniformity of the stored light intensity values. This device can quickly and accurately find the measurement points, improving the detection accuracy and efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of display panel detection, and particularly relates to a test device and a test method for a display panel. Background Art

[0002] Testing the optical performance of a display panel is an important link in the panel production process.

[0003] For example, the patent application with the publication number CN110879135A discloses an optical test device and an optical test method. The optical test device includes: a light guiding component, including a plurality of light channels arranged in an array and optically blocked from each other, and the plurality of light channels include a first light channel and a second light channel; a probe component, including an optical probe, and the first light channel and the second light channel are sleeved on the corresponding optical probes; a light shielding cover, arranged on the side of the light guiding component away from the probe component, the light shielding cover has a side wall and a receiving space formed by enclosing the side wall, and a light transmission port is opened on the side wall of the light shielding cover facing away from the light guiding component; an optical path changing component, arranged in the receiving space of the light shielding cover, and the optical path changing component includes a light direction conversion element, and a light direction conversion element is correspondingly arranged for the second light channel. The optical test device disclosed in the present invention can test the optical characteristics in at least two directions at a time, and can improve the optical test efficiency of the display panel.

[0004] The panel test device needs to light up the panel first, and then move the detector at each measurement point on the panel for optical detection. The brightness uniformity of the panel display is an important detection index for panel processing. When detecting the uniformity, it is necessary to accurately find the measurement points. If the manual method is used to find the points, it is overly dependent on the operator's empirical estimation of the measurement point positions, which affects the accuracy and test efficiency of the test results. Although the computer program can control the illuminometer to find the measurement points according to the set path, the requirements for software and hardware are relatively high, the equipment cost is high, and it is not conducive to popularization and application. Summary of the Invention

[0005] The purpose of the present invention is to provide a test device and a test method for a display panel, so as to solve the problem that it is difficult to find the measurement points during the detection of the panel light emission uniformity, which affects the accuracy and test efficiency of the test results.

[0006] The present invention provides the following technical solutions:

[0007] A test device for a display panel includes:

[0008] A workbench, on which a lighting mechanism is arranged for lighting up the panel;

[0009] The light shield is slidably mounted on the workbench and is located above the panel. A light-shielding layer is laid on the light shield, and the light-shielding layer includes a plurality of light-shielding sheets arranged closely in a grid pattern;

[0010] A sheet-transferring mechanism is used to remove some of the light-shielding sheets on the light shield, forming a plurality of measurement points spaced apart in the vertical and horizontal directions on the light shield. The light emitted by the panel forms light spots after passing through the measurement points;

[0011] The sheet-transferring mechanism includes:

[0012] A transfer terminal is used to obtain some of the light-shielding sheets on the light shield;

[0013] A Y-axis transfer component is used to drive the transfer terminal to move in the Y-axis direction, changing the Y-axis coordinate of the transfer terminal;

[0014] An X-axis transfer component is used to drive the transfer terminal to move in the X-axis direction, changing the X-axis coordinate of the transfer terminal;

[0015] It further includes a light measurement mechanism for measuring the brightness uniformity of the panel. The light measurement mechanism includes:

[0016] An illuminance meter is used to measure the light intensity of the light spots at the measurement points;

[0017] An XY-axis slide is used to drive the illuminance meter to move within the XY coordinate system plane, so that the illuminance meter moves above the measurement points and then detects the panel;

[0018] An operation unit is used to store the light intensity values above the measurement points and calculate the uniformity of the stored light intensity values.

[0019] Preferably, the X-axis transfer component includes an X-axis screw rod, an X-axis fixed beam, and an X-axis moving beam;

[0020] The X-axis screw rod is fixed on the bracket. The X-axis screw rod is a bidirectional screw rod. The X-axis fixed beam is fixed on the bracket and is located in the middle of the X-axis screw rod. The two X-axis moving beams are respectively installed on the two sliders of the X-axis screw rod and are located on the left and right sides of the X-axis fixed beam;

[0021] Both the X-axis fixed beam and the X-axis moving beam are provided with first guiding holes extending along the Y-axis, and the transfer terminal can slide along the first guiding holes.

[0022] Preferably, the Y-axis transfer component includes a Y-axis screw rod and a Y-axis moving beam;

[0023] The Y-axis screw rod is fixed on the bracket, and the Y-axis screw rod is also a bidirectional screw rod; the projection of the X-axis screw rod in the XY plane is located in the middle of the Y-axis screw rod, and the two Y-axis moving beams are respectively installed on the two sliders of the Y-axis screw rod and are located on the left and right sides of the X-axis screw rod;

[0024] The Y-axis moving beams are both provided with second guiding grooves extending along the X-axis, the second guiding grooves intersect with the first guiding holes, and the transfer terminal can slide along the second guiding grooves.

[0025] Preferably, the second guiding groove is a T-shaped groove, the top of the transfer terminal is provided with a T-shaped block matching the T-shaped groove, the T-shaped block penetrates through the first guiding hole and is slidably assembled in the T-shaped groove.

[0026] Preferably, the number of the measuring points is 9, which are distributed in three rows and three columns; the Y-axis transfer component and the X-axis transfer component arrange the transfer terminal according to the set measuring point coordinates.

[0027] Preferably, the wafer transfer mechanism further includes a Z-axis driving member for driving the transfer terminal to move up and down;

[0028] The transfer terminal can adsorb the light-shielding sheet;

[0029] The light-shielding sheet is a magnet sheet, and the transfer terminal is a magnet block; or the light-shielding sheet is a light rigid planar structural member, and the transfer terminal is a suction cup;

[0030] After the transfer terminal adsorbs the light-shielding sheet, the Z-axis driving member drives the transfer terminal to move upward.

[0031] Furthermore, it further includes a positioning mechanism for positioning the panel on the workbench;

[0032] The positioning mechanism includes a fixed positioning block, a moving positioning block and a driving component. The fixed positioning block and the moving positioning block are both L-shaped and are relatively distributed on the workbench along the diagonal direction of the panel; the fixed positioning block is fixed on the workbench, and the moving positioning block is driven by the driving component to move along the diagonal direction of the panel to cooperate with the fixed positioning block to position the panel.

[0033] Preferably, the driving component includes a cylinder, a swing rod and a push rod;

[0034] The cylinder is located below the workbench, the swing rod is hinged on the piston rod of the cylinder, and the top of the swing rod is wedge-shaped;

[0035] The ejector rod is hinged to the bottom of the workbench. The ejector rod is L-shaped. A sliding wall that closely adheres to the top of the swing rod is provided at the bottom of the horizontal side of the ejector rod, and the sliding wall magnetically attracts and engages with the top of the swing rod; the vertical side of the ejector rod abuts against the moving positioning block.

[0036] Before the panel is placed on the workbench, the air cylinder jacks up the swing rod. During the rotation of the swing rod, the swing rod moves along the sliding wall, driving the ejector rod to rotate towards the moving positioning block, and pushing the moving positioning block towards the side away from the fixed positioning block.

[0037] Preferably, a limiting structure is provided inside the workbench. The limiting structure includes a limiting hole extending longitudinally and a sliding groove that intersects the limiting hole obliquely. The sliding groove slopes downward towards the ejector rod side; the moving positioning block includes a block body and a sliding rod fixedly connected. The block body is located on the workbench, the sliding rod extends downward out of the limiting hole, and a convex block is provided on the side wall of the sliding rod. The convex block can slide obliquely along the sliding groove, so that the sliding rod abuts against the ejector rod, thereby automatically resetting the moving positioning block.

[0038] The testing method of the above testing device includes the following steps:

[0039] Determine the coordinates of each measuring point according to the area of the panel, and use the Y-axis transfer component and the X-axis transfer component to move each transfer terminal so that the transfer terminal corresponds to the position of the measuring point one by one;

[0040] Lower the transfer terminal, adsorb the light-shielding sheet on the measuring point, then raise the transfer terminal, and move away the Y-axis transfer component and the X-axis transfer component;

[0041] The air cylinder drives the ejector rod to rotate, pushing the moving positioning block in the direction away from the fixed positioning block to provide enough feeding space for the panel;

[0042] Load the panel between the moving positioning block and the fixed positioning block on the workbench and directly below the light-shielding plate;

[0043] The air cylinder resets the ejector rod, and the moving positioning block slides downward along the sliding groove under the action of gravity until it abuts against the ejector rod. At the same time, gently push the panel to position the panel on the workbench;

[0044] Light up the panel, turn on the illuminometer. The XY-axis slide table moves the illuminometer along a serpentine path. The illuminometer quickly moves above the measuring point according to the guidance of the measuring point, detects the light intensity value of the measuring point, and sends the detected value to the arithmetic unit; after the illuminometer completes the light intensity detection of each measuring point, the arithmetic unit calculates the display uniformity of the panel according to the formula: minimum light intensity value / maximum light intensity value * 100%.

[0045] The beneficial effects of the present invention are:

[0046] In the present invention, a light-shielding plate is placed above the panel, and a light-shielding layer formed by arranging a plurality of light-shielding sheets closely is laid on the light-shielding plate to block the light of the panel. The transfer terminal can suck away some light-shielding sheets to form a plurality of measurement points on the light-shielding plate. The coordinates of each measurement point are determined according to the shape and area of the panel, and each measurement point is evenly distributed along the X-axis and the Y-axis. During the test, only the position of the first measurement point needs to be determined first, and then the illuminance meter is moved along a serpentine path. The display uniformity of the panel is calculated according to the light intensity values detected by the illuminance meter. The present invention does not need to use software to calculate and control the movement trajectory of the illuminance meter, but forms measurement points by the strong and weak contrast of light passing through the light-shielding plate, which is convenient for quickly and accurately capturing the positions of the measurement points.

[0047] The light-shielding sheets of the present invention are laid on the light-shielding plate, so the positions of the measurement points can be flexibly adjusted according to the size specifications of the panel. Specifically, it is realized through the cooperation of the Y-axis transfer component and the X-axis transfer component. The transfer terminal can move along the second guiding groove of the Y-axis transfer component and the first guiding hole of the X-axis transfer component respectively to adjust the position of the transfer terminal. Both the Y-axis transfer component and the X-axis transfer component include a bidirectional lead screw. Therefore, every time other transfer terminals move once, they move the same distance along the Y-axis or the X-axis centered on the central transfer terminal, ensuring the accuracy of the positions of the measurement points. Brief Description of the Drawings

[0048] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0049] Figure 1 is a schematic diagram of the measurement point distribution structure of the present invention;

[0050] Figure 2 is a schematic diagram of the movement path of the illuminance meter of the present invention;

[0051] Figure 3 is a schematic diagram of the bottom view structure of the sheet moving mechanism of the present invention;

[0052] Figure 4 is a schematic cross-sectional view of the assembly structure of the transfer terminal of the present invention on the Y-axis transfer component and the X-axis transfer component;

[0053] Figure 5 is a schematic diagram of the front view structure of the present invention;

[0054] Figure 6 is a schematic diagram of the top view structure of the positional relationship between the panel and the positioning block before positioning of the present invention;

[0055] Figure 7 is Figure 6 the internal structure schematic diagram in the A direction of;

[0056] Figure 8 is a schematic cross-sectional structure view when the moving positioning block is in the initial state as seen from the B-B direction in Figure 7 ;

[0057] Figure 9 is a schematic cross-sectional structure view when the moving positioning block is pushed open as seen from the B-B direction in Figure 7 ;

[0058] In the figure, the markings are as follows: 1. light-shielding plate; 2. first bench; 3. second bench; 4. slide rail; 5. light-shielding sheet; 6. measuring point; 7. transfer terminal; 8. X-axis lead screw; 9. X-axis fixed beam; 10. X-axis moving beam; 11. Y-axis lead screw; 12. Y-axis moving beam; 13. first guiding hole; 14. second guiding groove; 15. dovetail track; 16. fixed positioning block; 17. moving positioning block; 18. air cylinder; 19. swing rod; 20. ejector rod; 21. horizontal side; 22. vertical side; 23. sliding wall; 24. limiting hole; 25. sliding groove; 26. block body; 27. sliding rod; 28. convex block; 29. panel; 30. T-shaped block. Detailed implementation mode

[0059] Embodiment 1

[0060] As Figures 1 to 5 shown, a test device for a display panel includes: a workbench, a light-shielding plate 1, and a film transfer mechanism.

[0061] The workbench includes a first bench 2 and a second bench 3 distributed from top to bottom. A lighting mechanism is provided on the second bench 2 for lighting the panel 29. The lighting mechanism includes electrode pins connected to a power supply, and the electrode pins are electrically connected to the pins of the panel to light the panel 29.

[0062] As Figure 5 shown, the light-shielding plate 1 is slidably mounted on the first bench 2 and is located above the panel. Among them, two parallel slide rails 4 are installed on the first bench 2, and a groove body matching the slide rails 4 is provided at the bottom of the light-shielding plate 1. The light-shielding plate 1 can move along the slide rails 4 to avoid the panel before the panel 29 is loaded. Limit blocks are provided on the slide rails 4 to limit the moving stroke of the light-shielding plate 1 so that it can accurately return to the initial position.

[0063] The light-shielding plate 1 is made of a transparent material, and an opaque light-shielding layer is laid on the light-shielding plate 1. The light-shielding layer includes a plurality of light-shielding sheets 5 arranged closely in a grid shape; the light-shielding sheets 5 are magnet sheets.

[0064] As Figure 1As shown, the film shifting mechanism is used to remove some of the light-shielding films 5 on the light-shielding plate 1, forming multiple measurement points 6 spaced along the vertical and horizontal directions on the light-shielding plate 1. The light emitted by the panel 29 forms light spots after passing through the measurement points 6, instructing the photometric mechanism to accurately and quickly complete the measurement of brightness uniformity according to the positions of the measurement points 6. The number of measurement points is 9, distributed in three rows and three columns.

[0065] Specifically, as Figure 3 shown, the film shifting mechanism includes: a transfer terminal 7, a Y-axis transfer component, and an X-axis transfer component. The Y-axis transfer component and the X-axis transfer component arrange the transfer terminal according to the set measurement point coordinates, and the horizontal spacing between two adjacent measurement points is equal, and the vertical spacing between two adjacent measurement points is also equal.

[0066] The transfer terminal 7 is used to suck some of the light-shielding films 5 on the light-shielding plate 1, and the transfer terminal 7 is a magnet block.

[0067] The Y-axis transfer component is used to drive the transfer terminal 7 to move along the Y-axis direction, changing the Y-axis coordinate of the transfer terminal.

[0068] The X-axis transfer component is used to drive the transfer terminal 7 to move along the X-axis direction, changing the X-axis coordinate of the transfer terminal.

[0069] Among them, the X-axis transfer component includes an X-axis lead screw 8, an X-axis fixed beam 9, and an X-axis moving beam 10.

[0070] The X-axis lead screw 8 is fixed on a movable bracket, and the bracket is installed on the robotic arm, and the robotic arm can move the bracket above the light-shielding plate 1. The X-axis lead screw 8 is a bidirectional lead screw with reverse threads. The X-axis fixed beam 9 is fixed on the bracket and located in the middle of the X-axis lead screw 8. Two X-axis moving beams 10 are respectively installed on the two sliders of the X-axis lead screw 8 and symmetrically located on the left and right sides of the X-axis fixed beam 9. When the X-axis lead screw 8 operates, it can drive the two X-axis moving beams 10 to move synchronously towards each other or away from each other, and the distances from the transfer terminals 7 on the two X-axis moving beams 10 to the X-axis fixed beam 9 are equal.

[0071] The Y-axis transfer component includes a Y-axis lead screw 11 and a Y-axis moving beam 12.

[0072] The Y-axis lead screw 11 is fixed on the bracket, and the Y-axis lead screw 11 is also a bidirectional lead screw; the projection of the X-axis lead screw 8 in the XY plane is located in the middle of the Y-axis lead screw 11. Two Y-axis moving beams 12 are respectively installed on the two sliders of the Y-axis lead screw 11 and symmetrically located on the left and right sides of the X-axis lead screw 8. When the Y-axis lead screw 11 operates, it can drive the two Y-axis moving beams 12 to move synchronously towards each other or away from each other.

[0073] As Figure 3 、 4As shown, first guiding holes 13 extending along the Y-axis are provided on both the X-axis fixed beam 9 and the X-axis moving beam 10, and the transfer terminal 7 can slide along the first guiding holes 13. The transfer terminals in the central row of the X-axis fixed beam 9 and the X-axis moving beam 10 are fixedly installed on the X-axis fixed beam and the X-axis moving beam and will not move under the drive of external forces.

[0074] Second guiding grooves 14 extending along the X-axis are provided on the Y-axis moving beam 12. The second guiding grooves 14 intersect with the projections of the first guiding holes 13 in the XY plane, and the transfer terminal 7 can slide along the second guiding grooves 14. The second guiding grooves 14 are T-shaped grooves, and T-shaped blocks 30 matching the T-shaped grooves are provided at the top of the transfer terminal 7. The T-shaped blocks 30 penetrate through the first guiding holes 13 and are slidably assembled in the T-shaped grooves.

[0075] When the X-axis screw rod 8 drives the X-axis moving beam 10 to move, the transfer terminal 7 moves along the second guiding grooves 14; when the Y-axis screw rod 11 drives the Y-axis moving beam 12 to move, the transfer terminal 7 moves along the first guiding holes 13, accurately changing the coordinates of the transfer terminal 7. Then the robotic arm lowers the bracket so that the transfer terminal 7 adsorbs the light-shielding sheet 5 on the light-shielding plate to form a light-transmitting measurement point 6.

[0076] The X-axis screw rod 8 is located on the left side of the entire sheet-transferring mechanism. An X-axis guide rail parallel to the X-axis screw rod is provided on the right side of the sheet-transferring mechanism. A swan-neck type track 15 is formed in the X-axis guide rail, and an X-axis guide groove matching the swan-neck type track 15 is correspondingly provided at the top of the Y-axis moving beam 12. They cooperate with the X-axis screw rod to stably guide the movement of the Y-axis moving beam 12.

[0077] This device further includes a light measurement mechanism for measuring the brightness uniformity of the panel. The light measurement mechanism includes:

[0078] An illuminance meter for measuring the light intensity of the light spot at the measurement point; the illuminance meter is located directly above the panel 29.

[0079] An XY-axis slide table for driving the illuminance meter to move within the XY coordinate system plane so that the illuminance meter moves above the measurement point to detect the panel 29; the XY-axis slide table can be a manual slide table.

[0080] An operation unit, communicatively connected to the illuminance meter, stores the light intensity values detected by the illuminance meter above the measurement point, and calculates the uniformity of the stored light intensity values.

[0081] Before the test, first determine the coordinates of each measurement point according to the length and width dimensions of the panel 29, so that there is a certain distance between the measurement point and the panel edge, for example Figure 1The distances a and b are respectively 1 / 6 of the width and length of the panel, and the lateral spacing and longitudinal spacing of adjacent measuring points are the same. Then, start the X-axis screw rod 8 and the Y-axis screw rod 11, move the transfer terminal 7 according to the coordinates of the measuring point 6, and then lower the moving terminal 7 to make the transfer terminal 7 adsorb one or more light-shielding sheets 5 on the light-shielding plate, forming a light-transmitting measuring point 6, and then raise and remove the transfer terminal 7.

[0082] During the test, first push the light-shielding plate 1 forward flat to facilitate placing the panel 29 on the second bench 3, and then reset the light-shielding plate 1 backward; first light up the panel 29, manually operate the XY-axis slide table, move the illuminometer in the XY plane, and under the guidance of nine measuring points, quickly move the illuminometer above the measuring points in turn to accurately measure the light intensity without manual point finding. Then, the operation unit uses the formula: uniformity = minimum light intensity / maximum light intensity * 100%, and calculates the brightness uniformity displayed on the panel. For example, if the uniformity reaches more than 80%, it is judged as qualified, otherwise it is judged as unqualified.

[0083] The sheet transfer mechanism further includes a Z-axis driving member for driving the transfer terminal to move up and down. The Z-axis driving member can be a cylinder or an electric slide table, and the robotic arm is installed on the Z-axis driving member.

[0084] Embodiment 2

[0085] The difference between this embodiment and Embodiment 1 is that the light-shielding sheet 5 is a lightweight rigid planar structural member, the transfer terminal 7 is a suction cup, and the transfer terminal 7 is connected to a negative pressure generator through an air pipe. During operation, the transfer terminal 7 adsorbs and fixes the light-shielding sheet 5 on the light-shielding plate and then transfers it away.

[0086] The other structures of this embodiment are the same as those of Embodiment 1.

[0087] Embodiment 3

[0088] This embodiment further includes a positioning mechanism on the basis of Embodiment 1 for positioning the panel 29 on the second bench of the workbench, improving the accuracy and consistency of the detection results.

[0089] As Figures 5 to 9 shown, the positioning mechanism includes a fixed positioning block 16, a moving positioning block 17 and a driving component. Both the fixed positioning block 16 and the moving positioning block 17 are L-shaped and are distributed oppositely along the diagonal direction of the panel 29 on the second bench 3 of the workbench, thereby positioning the two opposite top corners of the panel 29. As Figure 6 shown, the fixed positioning block 16 is fixed on the second bench 3, and the moving positioning block 17 is driven by the driving component to move along the diagonal direction of the panel and cooperate with the fixed positioning block 16 to position the panel 29.

[0090] The driving component includes a cylinder 18, a swing rod 19 and a push rod 20.

[0091] The cylinder 18 is located below the second stand 3 and can be fixed on the ground or a base. A swing arm 19 is hinged on the piston rod of the cylinder 18, and the top of the swing arm 19 is wedge-shaped.

[0092] like Figures 7 to 9 As shown, a push rod 20 is hinged to the bottom of the second platform 3. Push rod 20 is L-shaped, and a sliding wall 23 is provided at the bottom of the horizontal side 21 of the push rod, which is in close contact with the top of the rocker arm. The sliding wall 23 magnetically engages the top of the rocker arm 19. The vertical side 22 of the push rod 20 can abut the movable positioning block. The push rod 20 rotates counterclockwise to push the movable positioning block 17 forward, and rotates clockwise to reset the movable positioning block 17. The hinge point of the push rod is on the vertical side 22 of the push rod, so that the center of gravity of the push rod 20 is biased towards the horizontal side 21, facilitating the smooth reset of the push rod 20.

[0093] Specifically, before the panel 29 is placed on the second stand 3, the cylinder 18 lifts the rocker arm 19, causing the rocker arm 19 to move along the sliding wall 23 of the push rod during rotation, driving the push rod 20 to rotate toward the dynamic positioning block 17, and pushing the dynamic positioning block 17 away from the fixed positioning block 16, so as to facilitate panel loading.

[0094] A limiting structure is provided in the second stand 3, which includes a limiting hole 24 extending longitudinally and a slide groove 25 obliquely intersecting the limiting hole 24, and the slide groove 25 is inclined downward toward the side of the top rod 20; the dynamic positioning block 17 includes a fixedly connected block body 26 and a slide rod 27, and the L-shaped block body 26 is located on the second stand 3, and is used to gently push the panel 29 to position it, and the slide rod 27 extends downward from the limiting hole 24, and a protrusion 28 is provided on the side wall of the slide rod 27. The protrusion 28 can slide obliquely along the slide groove 25 under the action of gravity, so that the slide rod 27 abuts against the top rod 20, thereby automatically resetting the dynamic positioning block 17.

[0095] The other structures of this embodiment are the same as those of embodiment 1.

[0096] The commonly used method of driving the dynamic positioning block is to directly install the cylinder on the second frame and use the cylinder to drive the dynamic positioning block to move toward the panel. When the cylinder of this structure moves, the vibration is transmitted to the panel, causing the panel to shake. At the same time, the dynamic positioning block transmits the instantaneous thrust of the cylinder to the panel in a positive direction, which can easily damage the fragile panel.

[0097] The cylinder 18 of this embodiment is not installed on the tabletop, and does not directly transmit vibration to the panel 29, reducing the vibration of the panel. Moreover, when the cylinder 18 operates, the thrust generated will push the moving positioning block 17 away from the panel in the reverse direction, without damaging the panel; when the cylinder 18 resets, instead of transmitting a pulling force to the moving positioning block 17, the thrust on the moving positioning block is removed, and the moving positioning block 17 automatically moves along the downward-inclined chute 25, and automatically resets by using the gravity of the moving positioning block 17, gently pushing the panel 29, without generating a large impact force on the panel 29, effectively protecting the panel 29.

[0098] The testing method of the above testing device includes the following steps:

[0099] The cylinder 18 drives the ejector rod 20 to rotate, pushing the moving positioning block 17 in the direction away from the fixed positioning block 16, providing sufficient feeding space for the panel 29;

[0100] Feed the panel 29 onto the working table between the moving positioning block 17 and the fixed positioning block 16;

[0101] The cylinder 18 resets the ejector rod 20, and the moving positioning block 17 slides downward along the chute 25 under the action of gravity until it abuts against the vertical edge 22 of the ejector rod and stops moving. At the same time, the moving positioning block 17 gently pushes the panel 29 to position the panel 29 on the working table;

[0102] Move the light shielding plate 1 above the panel 29, determine the coordinates of each measuring point according to the length and width dimensions of the panel 29, and use the Y-axis transfer component and the X-axis transfer component to move each transfer terminal 7 so that the transfer terminal 7 corresponds to the measuring point position one by one;

[0103] Lower the transfer terminal 7, adsorb the light shielding sheet 5 on the measuring point 6, then raise the transfer terminal 7, and move away the Y-axis transfer component and the X-axis transfer component;

[0104] Light up the panel 29, turn on the illuminometer, operate the XY-axis slide table, and move the illuminometer along the Figure 2 shown serpentine path. The illuminometer pauses above the measuring point 6 for moving, performs light intensity value detection, and saves the light intensity value; after the illuminometer completes the light intensity detection of each measuring point, use the arithmetic unit to calculate the display uniformity of the panel according to the formula: minimum light intensity value / maximum light intensity value * 100%, and judge whether the uniformity is qualified.

[0105] The transfer operation of the light shielding sheet 5 on the measuring point can also be completed before the panel is fed.

[0106] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel testing device, characterized in that: include: A workbench, wherein a lighting mechanism is provided on the workbench for lighting the panel; A shading plate is slidably mounted on the workbench and is located above the panel. A shading layer is laid on the shading plate, and the shading layer includes a plurality of closely arranged shading sheets in a grid shape; a sheet moving mechanism for removing part of the light shielding sheet on the light shielding plate to form a plurality of measuring points spaced apart in the longitudinal and transverse directions on the light shielding plate, wherein light emitted by the panel forms light spots after passing through the measuring points; The sheet moving mechanism comprises: A transfer terminal is used to obtain a portion of the light shielding sheet on the light shielding plate; A Y-axis transfer component is used to drive the transfer terminal to move along the Y-axis direction to change the Y-axis coordinate of the transfer terminal; An X-axis transfer component is used to drive the transfer terminal to move along the X-axis direction to change the X-axis coordinate of the transfer terminal; The device further includes a light measuring mechanism for measuring the brightness uniformity of the panel, the light measuring mechanism including: Illuminance meter, used to measure the light intensity of the light spot at the measuring point; An XY-axis slide is used to drive the illuminometer to move in the XY coordinate plane so that the illuminometer moves above the measuring point and then detects the panel; A calculation unit, used for storing light intensity values above the measuring point and calculating the uniformity of each stored light intensity value; The X-axis transfer assembly includes an X-axis lead screw, an X-axis fixed beam, and an X-axis movable beam; The X-axis screw is fixed on the bracket, and the X-axis screw is a bidirectional screw. The X-axis fixed beam is fixed on the bracket and located in the middle of the X-axis screw. The two X-axis movable beams are respectively installed on the two sliders of the X-axis screw and are symmetrically located on the left and right sides of the X-axis fixed beam. The X-axis fixed beam and the X-axis movable beam are both provided with a first guide hole extending along the Y-axis, and the transfer terminal can slide along the first guide hole; The Y-axis transfer assembly includes a Y-axis lead screw and a Y-axis moving beam; The Y-axis screw is fixed to the bracket and is also a bidirectional screw. The projection of the X-axis screw in the XY plane is located in the middle of the Y-axis screw. The two Y-axis moving beams are respectively installed on the two sliders of the Y-axis screw and are symmetrically located on the left and right sides of the X-axis screw. The Y-axis movable beam is provided with a second guide groove extending along the X-axis, the second guide groove intersects with the projection of the first guide hole in the XY plane, and the transfer terminal can slide along the second guide groove; The sheet transfer mechanism further includes a Z-axis driving member for driving the transfer terminal to move up and down; The transfer terminal can absorb the light shielding sheet; The light shielding sheet is a magnet sheet, and the transfer terminal is a magnet block; or the light shielding sheet is a rigid planar structural member, and the transfer terminal is a suction cup; After the transfer terminal absorbs the light shielding sheet, the Z-axis driving component drives the transfer terminal upward.

2. The display panel testing device according to claim 1, wherein: The second guide groove is a T-shaped groove. A T-shaped block matching the T-shaped groove is provided on the top of the transfer terminal. The T-shaped block passes through the first guide hole and is slidably assembled in the T-shaped groove.

3. The display panel testing device according to claim 2, wherein: The number of the measuring points is 9, which are distributed in three rows and three columns; the Y-axis transfer component and the X-axis transfer component arrange the transfer terminal according to the set measuring point coordinates.

4. The display panel testing device according to claim 3, wherein: Also included is a positioning mechanism for positioning the panel on the workbench; The positioning mechanism includes a fixed positioning block, a dynamic positioning block and a drive assembly. The fixed positioning block and the dynamic positioning block are both L-shaped and are distributed relatively on the workbench along the diagonal direction of the panel; the fixed positioning block is fixed on the workbench, and the dynamic positioning block is driven by the drive assembly to move along the diagonal direction of the panel, cooperating with the fixed positioning block to position the panel.

5. The display panel testing device according to claim 4, wherein: The driving assembly includes a cylinder, a rocker rod and a push rod; The cylinder is located below the workbench, the swing arm is hinged to the piston rod of the cylinder, and the top of the swing arm is wedge-shaped; The push rod is hinged to the bottom of the workbench, and the push rod is L-shaped. The bottom of the horizontal side of the push rod is provided with a sliding wall that is close to the top of the rocker arm, and the sliding wall is magnetically attracted to the top of the rocker arm; the vertical side of the push rod abuts against the dynamic positioning block; Before the panel is placed on the workbench, the cylinder lifts the rocker arm, causing the rocker arm to move along the sliding wall during rotation, driving the push rod to rotate toward the dynamic positioning block, and pushing the dynamic positioning block away from the fixed positioning block.

6. The display panel testing device according to claim 5, characterized in that: A limiting structure is provided in the workbench, and the limiting structure includes a limiting hole extending longitudinally and a sliding groove obliquely intersecting with the limiting hole, and the sliding groove is inclined downward toward the side of the push rod; the dynamic positioning block includes a block body and a sliding rod fixedly connected, and the block body is located on the workbench, and the sliding rod extends downward from the limiting hole. A protrusion is provided on the side wall of the sliding rod, and the protrusion can slide obliquely along the sliding groove so that the sliding rod abuts against the push rod, thereby automatically resetting the dynamic positioning block.

7. A method for testing a display panel, characterized in that: The test method is implemented using the test device according to claim 6, and comprises the following steps: Determine the coordinates of each measuring point based on the area of the panel, and use the Y-axis transfer assembly and the X-axis transfer assembly to move each transfer terminal so that the transfer terminal corresponds to the measuring point position one by one; Lower the transfer terminal, absorb the light shielding sheet on the measuring point, then raise the transfer terminal and remove the Y-axis transfer assembly and the X-axis transfer assembly; The cylinder drives the ejector rod to rotate, pushing the dynamic positioning block away from the fixed positioning block, providing sufficient loading space for the panel; Load the panel between the dynamic positioning block and the fixed positioning block on the workbench and directly below the light shield; The cylinder resets the push rod, and the dynamic positioning block slides downward along the slide groove under the action of gravity until it abuts the push rod, and at the same time gently pushes the panel to position the panel on the workbench; Light up the panel, turn on the illuminance meter, and move the illuminance meter along a serpentine path on the XY-axis slide. The illuminance meter quickly moves above the measuring point according to the guidance of the measuring point, detects the light intensity value of the measuring point, and sends the detection value to the calculation unit. After the illuminance meter completes the light intensity detection of each measuring point, the calculation unit calculates the display uniformity of the panel according to the formula: minimum light intensity value / maximum light intensity value*100%.

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