Display test method and device of display panel

Abstract

The invention discloses a display testing method and device of a display panel. A display area of the display panel comprises a brightness monitoring area and at least two to-be-detected display areas. The brightness monitoring area is located on one side, far away from the first end of the first power line, of the preset to-be-detected display area or located in the preset to-be-detected display area and located in the area, far away from the first end of the first power line, of the preset to-be-detected display area; the area of the brightness monitoring area is smaller than a set area; the display test method comprises the following steps: driving any to-be-tested display area to display a first preset gray scale, simultaneously driving a brightness monitoring area to display a second preset gray scale and other display areas not to display pictures, and acquiring the brightness of the brightness monitoring area; and determining the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each to-be-detected display area displays the first preset gray scale. According to the invention, the test speed of the display uniformity of the display panel can be improved, and the equipment complexity is reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display testing method and device for a display panel. Background Art

[0002] With the development of display technology, people have higher and higher requirements on the display performance of display panels. However, the display uniformity of existing display panels is poor. Display uniformity testing is required before the display panel leaves the factory. However, the existing testing methods have slow testing speed and high equipment complexity. Summary of the invention

[0003] The present invention provides a display test method and device for a display panel, so as to improve the test speed of the display uniformity of the display panel and reduce the complexity of the equipment.

[0004] According to one aspect of the present invention, a display test method for a display panel is provided, wherein the display panel comprises a display area and a non-display area, wherein the display area comprises a brightness monitoring area and at least two display areas to be tested, wherein the at least two display areas to be tested are arranged in sequence along a first direction; wherein the display panel further comprises a first power line and a driver chip disposed in the non-display area, wherein the driver chip and the at least two display areas to be tested are distributed along the first direction; wherein a first end of the first power line is connected to the driver chip to receive a first power signal; and the first power line extends to the display area and is used to provide a first power signal to sub-pixels in the at least two display areas to be tested;

[0005] The brightness monitoring area is located on a side of a preset display area to be tested that is far away from the first end of the first power line, or the brightness monitoring area is located in the preset display area to be tested and is located in a region of the preset display area to be tested that is far away from the first end of the first power line; the preset display area to be tested is the display area to be tested that is farthest from the first end of the first power line, and the area of ​​the brightness monitoring area is smaller than the set area;

[0006] The display testing method comprises:

[0007] Driving any display area to be tested to display a first preset grayscale, and driving the brightness monitoring area to display a second preset grayscale, while other display areas do not display pictures, and obtaining the brightness of the brightness monitoring area;

[0008] The brightness uniformity of the display panel is determined according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0009] Optionally, determining the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset grayscale includes:

[0010] The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0011] Optionally, obtaining the brightness of the brightness monitoring area includes:

[0012] An optical measuring device is used to acquire the brightness of the brightness monitoring area, wherein a minimum size of the brightness monitoring area is greater than or equal to a maximum size of a brightness acquisition area of ​​a measuring probe of the optical measuring device.

[0013] Optionally, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical measuring device.

[0014] Optionally, the brightness monitoring area is circular in shape.

[0015] Optionally, the non-display area includes a first non-display area; the first non-display area is located on a side of the preset display area to be tested that is away from the first end of the first power line, and the distance between the brightness monitoring area and the first non-display area is less than a preset distance.

[0016] Optionally, the brightness monitoring area is adjacent to the first non-display area.

[0017] Optionally, when the display area to be tested displays the first preset gray scale, the average brightness of the display area is equal to the average brightness of the brightness monitoring area when the display area to be tested displays the second preset gray scale.

[0018] Optionally, the first preset grayscale and the second preset grayscale satisfy the following formula:

[0019] A*L n1 =L n2 ;

[0020] Where A is the ratio of the area of ​​the display area to be tested to the area of ​​the display area, L n1 is the brightness corresponding to the first preset grayscale n1, L n2 is the brightness corresponding to the second preset gray scale n2.

[0021] Optionally, the first preset grayscale is 255, and the first preset grayscale and the second preset grayscale satisfy the following formula:

[0022] A*L 255 =(n2 / 255) 2·2 *L 255 ;

[0023] Among them, L 255 The brightness corresponding to 255 grayscale.

[0024] Optionally, the at least two display areas to be tested are of the same size.

[0025] Optionally, the at least two display areas to be tested have the same shape.

[0026] Optionally, the display area includes a first edge and a second edge relative to each other, the first edge and the second edge extend along the first direction; along the second direction, the distances between different display areas to be tested and the first edge are the same or different; wherein the first direction and the second direction intersect with each other.

[0027] Optionally, each of the display areas to be tested includes a plurality of pixel rows sequentially arranged along a first direction, and each of the pixel rows includes a plurality of sub-pixels sequentially arranged along a second direction.

[0028] Optionally, the number of the display areas to be tested is 3, the width of each of the display areas to be tested along the second direction is equal to the width of the display area, and the brightness monitoring area is located within the preset display area to be tested.

[0029] Optionally, the display panel includes a first display area to be tested, a second display area to be tested, a third display area to be tested, a fourth display area to be tested and a fifth display area to be tested, the width of each of the display areas to be tested along the second direction is smaller than the width of the display area, the first display area to be tested, the second display area to be tested and the third display area to be tested are arranged in sequence along the first direction, the first display area to be tested, the second display area to be tested and the third display area to be tested are at the same distance from the first edge, the fourth display area to be tested and the fifth display area to be tested are located on both sides of the second display area to be tested along the second direction, and the brightness monitoring area is located on a side of the preset display area to be tested away from the first end of the first power line.

[0030] Optionally, the non-display area further includes a second power line, and the second power line is used to provide a second power signal for the sub-pixels in the at least two display areas to be tested;

[0031] Each of the sub-pixels includes a pixel driving circuit and a light-emitting unit, the power supply end of the pixel driving circuit is electrically connected to the first power line, the output end of the pixel driving circuit is electrically connected to the first end of the light-emitting unit, and the second end of the light-emitting unit is electrically connected to the second power line.

[0032] According to another aspect of the present invention, a display test device for a display panel is provided, wherein the display panel comprises a display area and a non-display area, wherein the display area comprises a brightness monitoring area and at least two display areas to be tested, wherein the at least two display areas to be tested are arranged in sequence along a first direction; wherein the display panel further comprises a first power line and a driver chip disposed in the non-display area, wherein the driver chip and the at least two display areas to be tested are distributed along the first direction; wherein a first end of the first power line is connected to the driver chip to receive a first power signal; and the first power line extends to the display area, and is used to provide a first power signal to sub-pixels in the at least two display areas to be tested;

[0033] The brightness monitoring area is located on a side of a preset display area to be tested that is far away from the first end of the first power line, or the brightness monitoring area is located in the preset display area to be tested and is located in a region of the preset display area to be tested that is far away from the first end of the first power line; the preset display area to be tested is the display area to be tested that is farthest from the first end of the first power line, and the area of ​​the brightness monitoring area is smaller than a set value;

[0034] The display testing device comprises:

[0035] A brightness acquisition module, used to drive any display area to be tested to display a first preset gray scale, and drive the brightness monitoring area to display a second preset gray scale, while other display areas do not display, and acquire the brightness of the brightness monitoring area;

[0036] The uniformity determination module is used to determine the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0037] Optionally, the uniformity determination module is specifically used to:

[0038] The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0039] Optionally, the brightness acquisition module is specifically used for:

[0040] An optical measuring device is used to acquire the brightness of the brightness monitoring area, wherein a minimum size of the brightness monitoring area is greater than or equal to a maximum size of a brightness acquisition area of ​​a measuring probe of the optical measuring device.

[0041] Optionally, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical measuring device.

[0042] Optionally, the brightness monitoring area is circular in shape.

[0043] The embodiment of the present invention drives any display area to be tested to display the first preset gray scale, and drives the brightness monitoring area to display the second preset gray scale, and other display areas do not display pictures, and obtains the brightness of the brightness monitoring area, and determines the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each display area to be tested displays the first preset gray scale. Only the brightness of the brightness monitoring area needs to be measured to determine the display uniformity of the display panel, and there is no need to change the measurement position of the brightness measurement device, which is simple to operate, fast in measurement speed, and low in equipment complexity. In addition, the area of ​​the brightness monitoring area is small, the equivalent resistance is large, and the brightness monitoring area has little effect on the brightness of the display area to be tested. The resistance of the display area to be tested will affect the first power supply voltage of the display area to be tested, the first power supply voltage applied to the brightness monitoring area, and the brightness of the brightness monitoring area. Therefore, the brightness of the brightness monitoring area can reflect the first power supply voltage of the brightness monitoring area, the first power supply voltage of the display area to be tested, and the brightness of the display area to be tested. Therefore, by measuring each display area to be tested to display the first preset gray scale, when the brightness monitoring area displays the second gray scale, the brightness of the brightness monitoring area can determine the brightness of the display area to be tested, thereby determining the brightness uniformity of the display panel. In summary, the solution of the embodiment of the present invention has a fast measurement speed and low equipment complexity while ensuring that the brightness uniformity of the display panel can be accurately tested.

[0044] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 is a schematic diagram of a display panel;

[0047] Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention;

[0048] Figure 3 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0049] Figure 4 is a flow chart of a display test method of a display panel provided by an embodiment of the present invention;

[0050] Figure 5 is a circuit equivalent diagram of a display panel provided by an embodiment of the present invention;

[0051] Figure 6 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0052] Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0053] Figure 8 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0054] Fig. 9 is a schematic diagram of another display panel provided by an embodiment of the present invention;

[0055] Fig.10 is a schematic diagram of a sub-pixel;

[0056] Fig.11 It is a schematic diagram of a display test device for a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 is a schematic diagram of a display panel, see Figure 1, each sub-pixel 30 in the display panel needs a first power signal ELVDD to display the picture. The first power signal ELVDD is output by the driver chip and transmitted to each sub-pixel 30 through the first power line 50. Since the first power line 50 and the sub-pixel 30 themselves have resistance, the first power signal ELVDD will be divided, resulting in the voltage of the first power signal ELVDD changing during the transmission process. For example, the voltage of the first power signal ELVDD at the near driver chip end is greater than the voltage at the far driver chip end, so that when the display panel displays the same grayscale picture, the brightness of different display areas is different, affecting the display uniformity of the display panel. The prior art measures the brightness of different areas of the display panel in turn through a brightness acquisition device, which has a slow measurement speed and high equipment complexity.

[0060] Based on this, the present invention provides a display test method for a display panel. Figure 2 is a schematic diagram of a display panel provided by an embodiment of the present invention, Figure 3 is a schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 2 and Figure 3 The display panel includes a display area 10 and a non-display area 20, the display area includes a brightness monitoring area 12 and at least two display areas to be tested 11, and the at least two display areas to be tested 11 are arranged in sequence along a first direction X; the display panel also includes a first power line 50 and a driver chip of the non-display area 20, and the driver chip and the at least two display areas to be tested 11 are distributed along the first direction X; wherein the first end 51 of the first power line 50 is connected to the driver chip to receive a first power signal; the first power line 50 extends to the display area 10, and is used to provide a first power signal to the sub-pixels 30 in the at least two display areas 11 to be tested;

[0061] The brightness monitoring area 12 is located on a side of the preset display area to be tested 111 away from the first end 51 of the first power line 50, or the brightness monitoring area 12 is located within the preset display area to be tested 111 and is located in a region of the preset display area to be tested away from the first end 51 of the first power line 50; the preset display area to be tested 111 is the display area to be tested farthest from the first end 51 of the first power line 50, and the area of ​​the brightness monitoring area 12 is smaller than the set area.

[0062] Specifically, refer to Figure 2-Figure 3The display area 10 of the display panel is used to display the picture. The display area may include a plurality of sub-pixels 30. Each sub-pixel 30 includes a pixel driving circuit and a light-emitting unit. The pixel driving circuit is used to drive the light-emitting structure unit. The non-display area 20 does not display the picture. The non-display area 20 surrounds the display area 10. The first power line 50 is used to provide a first power signal to the pixel driving circuit of the sub-pixel 30. The display panel may include two or more display areas 11 to be tested. The sizes of different display areas 11 to be tested may be the same, and the shapes of different display areas 11 to be tested may be the same or different. The first power signal is input into the first power line 50 by the first end 51 of the first power line 50 and is transmitted along the first power line 50. The set area can be determined according to the area of ​​the brightness collection probe of the brightness collection device. For example, the area size of the brightness monitoring area 12 can be close to the size of the low beam hole of the brightness collection device. When the brightness monitoring area 12 is located in the preset display area to be tested 111 and is located in the preset display area to be tested away from the first end 51 of the first power line 50 , the brightness monitoring area 12 can be adjacent to an edge of the preset display area to be tested 111 away from the first end 51 of the first power line 50 .

[0063] Figure 4 is a flow chart of a display test method for a display panel provided by an embodiment of the present invention, with reference to Figure 4 , showing that the test methods include:

[0064] S110 , driving any display area to be tested to display a first preset gray scale, and driving the brightness monitoring area to display a second preset gray scale, while other display areas do not display pictures, and obtaining the brightness of the brightness monitoring area.

[0065] Specifically, refer to Figure 2 and Figure 3 , each time, a display area 11 to be tested and a brightness monitoring area 12 are driven simultaneously to display a picture, the display area 11 to be tested displays the first preset gray scale, the brightness monitoring area 12 displays the second preset gray scale, and the other display areas 11 to be tested do not display pictures, and the brightness of the brightness monitoring area 12 is obtained, and so on, the brightness of each display area 11 to be tested when it displays the first preset gray scale and the brightness monitoring area 12 displays the second preset gray scale can be obtained. Exemplarily, the first display area to be tested can be driven to display the first preset gray scale, the brightness monitoring area 12 can be driven to display the second preset gray scale, and the brightness of the brightness monitoring area 12 can be obtained; then the second display area to be tested can be driven to display the first preset gray scale, the brightness monitoring area 12 can be driven to display the second preset gray scale, and the brightness of the brightness monitoring area 12 can be obtained; ..., the nth display area to be tested can be driven to display the first preset gray scale, the brightness monitoring area 12 can be driven to display the second preset gray scale, and the brightness of the brightness monitoring area 12 can be obtained.

[0066] In addition, the first preset grayscale can be set according to the test needs. For example, the first preset grayscale can be 255 grayscales. The second preset grayscale can be determined according to the display characteristics of the display panel to ensure that when the brightness monitoring area 12 displays the second preset grayscale, it can reflect the brightness of the display area 11 to be tested when it displays the first preset grayscale. For example, the second preset grayscale can be set according to the area of ​​the display area 11 to be tested, the area of ​​the brightness monitoring area 12, and the first preset grayscale. For example, the average brightness when the brightness monitoring area 12 displays the second preset grayscale can be set to be equal to the average brightness of the display area when the display area 11 to be tested displays the first preset grayscale.

[0067] S120 , determining brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each display area to be tested displays a first preset gray scale.

[0068] Specifically, Figure 5 is a circuit equivalent diagram of a display panel provided by an embodiment of the present invention, referring to Figure 2-Figure 5 , when the brightness monitoring area 12 is set at a preset display area to be tested 111 away from the first end 51 of the first power line 50, the display area to be tested 11 and the brightness monitoring area 12 are in a parallel relationship when displaying a picture. Exemplarily, the display panel includes three display areas to be tested 11, and the three display areas to be tested 11 are arranged in sequence along the first direction X. The equivalent resistance of the first display area to be tested is R11, the equivalent resistance of the second display area to be tested is R12, and the equivalent resistance of the third display area to be tested is R13. When a certain display area to be tested 11 displays a picture and other display areas to be tested 11 do not display a picture, the display area to be tested 11 that displays the picture and the brightness monitoring area 12 are in a parallel relationship.

[0069] When the brightness monitoring area 12 is arranged in the preset display area to be tested 111 and is located in the area of ​​the preset display area to be tested away from the first end 51 of the first power line 50, when the display areas 11 to be tested other than the preset display area to be tested 111 display pictures, they are in parallel with the brightness monitoring area 12. When the preset display area to be tested 111 displays pictures, the sub-pixels in the preset display area to be tested 111 that are located in the same row as the brightness monitoring area 12 are in series with the brightness monitoring area 12, and the other sub-pixels are in parallel with the brightness monitoring area 12. Since the area of ​​the brightness monitoring area 12 is relatively small, the number of sub-pixels in the preset display area to be tested 111 that are connected in series with the brightness monitoring area 12 is relatively small, which can be equivalent to the brightness monitoring area 12 being connected in parallel with the preset display area to be tested 111.

[0070] The smaller the display area, the larger the equivalent parallel resistance. The area of ​​the brightness monitoring area 12 is smaller than the set area. The area of ​​the brightness monitoring area 12 is much smaller than the area of ​​the display area 11 to be tested. The equivalent resistance of the brightness monitoring area 12 is much larger than the resistance of the display area 11 to be tested. The resistance of the brightness monitoring area 12 has little effect on the voltage division of the display area 11 to be tested. The brightness monitoring area 12 has little effect on the brightness of the display area 11 to be tested. The resistance of the display area 11 to be tested will affect the first power supply voltage of the display area 11 to be tested, the first power supply voltage applied to the brightness monitoring area 12, and the brightness of the brightness monitoring area 12. Therefore, the brightness of the brightness monitoring area 12 can reflect the first power supply voltage of the brightness monitoring area 12, the first power supply voltage of the display area 11 to be tested, and the brightness of the display area 11 to be tested. Therefore, by measuring each display area 11 to be tested displays the first preset gray scale, and the brightness monitoring area 12 displays the second gray scale, the brightness of the brightness monitoring area 12 can determine the brightness of the display area 11 to be tested, thereby determining the brightness uniformity of the display panel.

[0071] Exemplarily, the ratio of the brightness of the brightness monitoring areas 12 corresponding to different display areas to be tested may be calculated, and the brightness uniformity of the display panel may be determined according to the ratio.

[0072] The embodiment of the present invention drives any display area to be tested to display the first preset grayscale, and drives the brightness monitoring area to display the second preset grayscale, while other display areas do not display pictures, and obtains the brightness of the brightness monitoring area, and determines the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each display area to be tested displays the first preset grayscale. The display uniformity of the display panel can be determined by measuring the brightness of the brightness monitoring area only, without changing the measurement position of the brightness measurement device, and the operation is simple, the measurement speed is fast, and the equipment complexity is low. In addition, the area of ​​the brightness monitoring area 12 is small, the equivalent resistance is large, and the brightness monitoring area 12 has little effect on the brightness of the display area 11 to be tested. The resistance of the display area 11 to be tested will affect the first power supply voltage of the display area 11 to be tested, affect the first power supply voltage applied to the brightness monitoring area 12, and affect the brightness of the brightness monitoring area 12. Therefore, the brightness of the brightness monitoring area 12 can reflect the first power supply voltage of the brightness monitoring area 12, reflect the first power supply voltage of the display area 11 to be tested, and reflect the brightness of the display area 11 to be tested. Therefore, by measuring each display area 11 to be tested displays the first preset gray scale, and the brightness monitoring area 12 displays the second gray scale, the brightness of the brightness monitoring area 12 can determine the brightness of the display area 11 to be tested, thereby determining the brightness uniformity of the display panel. In summary, the solution of the embodiment of the present invention has a fast measurement speed and low equipment complexity while ensuring that the brightness uniformity of the display panel can be accurately tested.

[0073] Optionally, determining the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each display area to be tested displays the first preset gray scale includes:

[0074] The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each display area to be tested displays the first preset gray scale.

[0075] Specifically, since the brightness of the brightness monitoring area 12 can reflect the brightness of the display area 11 to be tested, the ratio of the brightness of the brightness monitoring area 12 when each display area 11 to be tested displays the first preset gray scale can reflect the ratio of the brightness of each display area 11 to be tested, thereby reflecting the brightness uniformity of the display panel. The ratio of the brightness of the brightness monitoring area 12 when each display area 11 to be tested displays the first preset gray scale is calculated with a fast calculation speed, which can further improve the measurement speed of display uniformity.

[0076] Exemplarily, the brightness uniformity of the display panel can be determined according to the ratio of the brightness of the brightness monitoring area 12 when the first display area to be tested displays the first preset grayscale and the brightness monitoring area displays the second preset grayscale, to the brightness of the brightness monitoring area 12 when the second display area to be tested displays the first preset grayscale and the brightness monitoring area displays the second preset grayscale, ... to the brightness of the brightness monitoring area 12 when the nth display area to be tested displays the first preset grayscale and the brightness monitoring area displays the second preset grayscale. Where n is an integer greater than or equal to 2.

[0077] Based on the above embodiment, optionally, obtaining the brightness of the brightness monitoring area includes:

[0078] An optical measuring device is used to obtain the brightness of a brightness monitoring area, wherein a minimum size of the brightness monitoring area is greater than or equal to a maximum size of a brightness acquisition area of ​​a measuring probe of the optical measuring device.

[0079] The optical measuring device may be a color analyzer or a spectroradiometer, etc., which is an optical measuring device capable of collecting brightness. The size of the brightness collection area of ​​the measuring probe of the optical measuring device is the size of the low beam hole of the optical measuring device, and the minimum size of the brightness monitoring area is greater than or equal to the maximum size of the brightness collection area of ​​the measuring probe of the optical measuring device. The size of the brightness monitoring area may be greater than or equal to the size of the low beam hole of the optical measuring device.

[0080] Specifically, the minimum size of the brightness monitoring area is set to be greater than or equal to the maximum size of the brightness collection area of ​​the measuring probe of the optical measuring device. When the brightness of the brightness monitoring area is measured, the projection of the measuring probe on the brightness monitoring area is located within the brightness monitoring area, so that the measuring probe can accurately measure the brightness of the brightness monitoring area.

[0081] Based on the above embodiment, optionally, the minimum size of the brightness monitoring area is greater than or equal to 4 mm and less than or equal to 20 mm.

[0082] Specifically, when the size of the brightness monitoring area is too small, the size requirement for the measuring probe of the optical measuring equipment is too high, which is not conducive to reducing costs. When the size of the brightness monitoring area is too large, the brightness monitoring area may affect the brightness of the display area to be measured, affecting the measurement accuracy. By setting the minimum size of the brightness monitoring area to be greater than or equal to 4mm and less than or equal to 20mm, while ensuring that the brightness monitoring area has a smaller size and does not affect the brightness of the display area to be measured, ensuring that the brightness of the brightness monitoring area can better reflect the brightness of the display area to be measured, and improving the display uniformity measurement accuracy, the size requirement for the measuring probe of the optical measuring equipment can be reduced, and the cost can be reduced.

[0083] Based on the above embodiment, optionally, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical device.

[0084] This arrangement allows the brightness monitoring area to be smaller in size, ensuring that the brightness monitoring area will not affect the brightness of the display area to be tested, ensuring that the brightness of the brightness monitoring area can better reflect the brightness of the display area to be tested, and improving the measurement accuracy of display uniformity.

[0085] Based on the above embodiment, optionally, the shape of the brightness monitoring area is circular.

[0086] Specifically, the low beam hole of the measuring probe of the optical measuring device is circular.

[0087] Based on the above embodiment, optionally, refer to Figure 2 and Figure 3 The non-display area 20 includes a first non-display area 21; the first non-display area 21 is located on the side of the preset display area to be tested 111 away from the first end of the first power line, and the distance between the brightness monitoring area 12 and the first non-display area 21 is less than the preset distance.

[0088] Among them, reference Figure 2 , the first non-display area 21 is adjacent to the preset display area to be tested 111. When the brightness monitoring area 12 is located in the preset display area to be tested 111, the closer the distance between the brightness monitoring area 12 and the first non-display area 21 is, the smaller the influence of the brightness monitoring area 12 on the voltage division of the preset display area to be tested 111 is, and the influence on the brightness of the preset display area to be tested 111 is smaller. By setting the distance between the brightness monitoring area 12 and the first non-display area 21 to be less than the preset distance, the brightness monitoring area 12 has less influence on the brightness of the preset display area to be tested 111, thereby improving the accuracy of the display uniformity test result.

[0089] refer to Figure 3When the brightness monitoring area 12 is located on a side of the preset display area 111 to be tested away from the first end 51 of the first power line 50, the closer the distance between the brightness monitoring area 12 and the first non-display area 21 is, the smaller the area of ​​the display area 10 between the brightness monitoring area 12 and the first non-display area 21 is, the larger the area ratio of all display areas 11 to be tested to the display area 10 is, the larger the test area of ​​the display area 10 is, and the display uniformity of the display panel can be better tested.

[0090] Exemplarily, the preset distance may be several millimeters, for example, 5 millimeters.

[0091] On the basis of the above embodiment, optionally, the brightness monitoring area 12 is adjacent to the first non-display area 21 .

[0092] Specifically, refer to Figure 2 When the brightness monitoring area 12 is located in the preset display area 111 to be tested, and when the brightness monitoring area 12 is adjacent to the first non-display area 21, the brightness monitoring area 12 has the smallest effect on the voltage division of the preset display area 111 to be tested, further improving the accuracy of the display uniformity test result.

[0093] refer to Figure 3 When the brightness monitoring area 12 is located on a side of the preset display area 111 to be tested away from the first end 51 of the first power line 50, and when the brightness monitoring area 12 is adjacent to the first non-display area 21, the area ratio of all display areas 11 to be tested to the display area 10 is the largest, and the test area of ​​the display area 10 is the largest, so the display uniformity of the display panel can be better tested.

[0094] On the basis of the above embodiment, optionally, when the display area to be tested 11 displays a first preset gray scale, the average brightness of the display area is equal to the average brightness of the brightness monitoring area 12 when it displays a second preset gray scale.

[0095] With this arrangement, the brightness of the brightness monitoring area 12 is consistent with the brightness of the display area 11 to be tested per unit area, and the brightness change of the brightness monitoring area 12 is consistent with the brightness change of the display area 11 to be tested. The brightness of the brightness monitoring area 12 can more accurately reflect the brightness of the display area 11 to be tested, thereby improving the display uniformity test accuracy of the display panel.

[0096] Based on the above embodiment, optionally, the first preset grayscale and the second preset grayscale satisfy the following formula:

[0097] A*L n1 =L n2 ;

[0098] Where A is the ratio of the area of ​​the display area to be tested to the area of ​​the display area, L n1 is the brightness corresponding to the first preset grayscale n1, L n2 is the brightness corresponding to the second preset gray scale n2.

[0099] That is, A*display area*L n1 =100% display area*n2 brightness at grayscale.

[0100] On the basis of the above embodiment, optionally, the first preset grayscale is 255, and the first preset grayscale and the second preset grayscale satisfy the following formula:

[0101] A*L 255 =(n2 / 255) 2·2 *L 255 ;

[0102] Among them, L 255 The brightness corresponding to 255 grayscale.

[0103] For example, if the area of ​​the display area 11 to be tested is 1 / 3 of the area of ​​the display area 10, then A=1 / 3, n2=148 grayscales. If the area of ​​the display area 11 to be tested is 1 / 10 of the area of ​​the display area 10, then A=1 / 10, n2=90 grayscales.

[0104] On the basis of the above embodiment, optionally, at least two display areas 11 to be tested have the same size and shape.

[0105] This arrangement can reduce the driving difficulty of the display area 11 to be tested and improve the test speed.

[0106] Figure 6 is a schematic diagram of another display panel provided by an embodiment of the present invention, Figure 7 is a schematic diagram of another display panel provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 The display area 10 includes a first edge 101 and a second edge 102 opposite to each other, and the first edge 101 and the second edge 102 extend along a first direction X; along a second direction Y, the distances between different display areas 11 to be tested and the first edge 101 are the same or different; wherein the first direction X and the second direction Y intersect each other.

[0107] The first direction X may be the length direction of the display panel, and the second direction Y may be the width direction of the display panel. The width of the display area 11 to be tested along the first direction X may be less than or equal to the width of the display area 10 along the first direction X. Figure 6 and Figure 7 When the width of the display area 11 to be tested along the second direction Y is smaller than the width of the display area 10 along the second direction Y, the distances between different display areas 11 to be tested and the first edge 101 may be different ( Figure 6), or the distances between different display areas to be tested 11 and the first edge 101 may be the same ( Figure 7 ).

[0108] Specifically, the position and size of the display area 11 to be tested can be set as required, and this embodiment does not specifically limit this. This embodiment can meet different test requirements by setting the distances between different display areas 11 to be tested and the first edge 101 to be the same or different along the second direction Y.

[0109] On the basis of the above embodiment, optionally, each display area 11 to be tested includes a plurality of pixel rows 310 sequentially arranged along the first direction X, and each pixel row 310 includes a plurality of sub-pixels 30 sequentially arranged along the second direction Y.

[0110] Specifically, the width of each display area 11 to be tested along the second direction Y is equal to the width of the display area 10. The inventors have found through experiments that when the width of each display area 11 to be tested along the second direction Y is equal to the width of the display area 10, compared with determining the display uniformity by measuring the brightness of each display area 11 to be tested by an optical measuring device, the measurement error of the solution of this embodiment is within 1%.

[0111] Based on the above embodiment, optionally, continue to refer to Figure 2 The number of the display areas 11 to be tested is 3, the width of each display area 11 to be tested along the second direction Y is equal to the width of the display area 10, and the brightness monitoring area 12 is located in the preset display area 111 to be tested.

[0112] or, Figure 8 is a schematic diagram of another display panel provided by an embodiment of the present invention, Fig. 9 is a schematic diagram of another display panel provided by an embodiment of the present invention, referring to Figure 8 and Fig. 9 The display panel includes a first display area to be tested 1101, a second display area to be tested 1102, a third display area to be tested 1103, a fourth display area to be tested 1104 and a fifth display area to be tested 1105. The width of each display area to be tested along the second direction Y is smaller than the width of the display area 10. The first display area to be tested 1101, the second display area to be tested 1102 and the third display area to be tested 1103 are arranged in sequence along the first direction X. The first display area to be tested 1101, the second display area to be tested 1102 and the third display area to be tested 1103 are at the same distance from the first edge 101. The fourth display area to be tested 1104 and the fifth display area to be tested 1105 are located on both sides of the second display area to be tested 1102 along the second direction Y. The brightness monitoring area 111 is located on a side of the preset display area to be tested 111 away from the first end of the first power line 50.

[0113] Specifically, refer to Figure 2The lengths of the three display areas 11 to be tested along the first direction X are equal, and the area of ​​each display area 11 to be tested may be 30% of the area of ​​the display area 10. The inventors have found through experiments that by lighting up Figure 2 The display area 11 to be tested and the brightness monitoring area 12 shown are used to measure the uniformity of the display panel. Compared with measuring the brightness of each display area 11 to be tested by optical measuring equipment to determine the display uniformity, the measurement error of the solution of this embodiment is within 1%.

[0114] refer to Figure 8 and Fig. 9 , the distances between each of the first display area to be tested 1101, the second display area to be tested 1102 and the third display area to be tested 1103 and the first edge 101 and the second edge 102 may be equal. The fourth display area to be tested 1104 and the fifth display area to be tested 1105 may overlap with the second display area to be tested 1102 ( Fig. 9 ) can also be non-overlapping ( Figure 8 The areas of the first display area to be tested 1101 , the second display area to be tested 1102 , the third display area to be tested 1103 , the fourth display area to be tested 1104 and the fifth display area to be tested 1105 may be 10% of the area of ​​the display area 10 respectively.

[0115] The first display area 1101 to be tested, the second display area 1102 to be tested, the third display area 1103 to be tested, the fourth display area 1104 to be tested, and the fifth display area 1105 to be tested are respectively located at the top, middle, bottom, left, and right of the display area 10, which can more accurately measure the display uniformity. The inventors have found through experiments that by lighting up the Figure 8 and Fig. 9 The display area to be tested and the brightness monitoring area 12 shown in the figure perform uniformity measurement on the display panel. Compared with determining the display uniformity by measuring the brightness of each display area to be tested 11 by optical measuring equipment, the measurement error of the solution of this embodiment is within 1%.

[0116] Optional, reference Fig. 9 , the non-display area 20 further includes a second power line 60, and the second power line 60 is used to provide a second power signal ELVSS to the sub-pixels in at least two display areas 11 to be tested;

[0117] Fig.10 is a schematic diagram of a sub-pixel, see Fig.10 Each sub-pixel 30 includes a pixel driving circuit 301 and a light-emitting unit 302, the power supply end of the pixel driving circuit 301 is electrically connected to the first power line 50, the output end of the pixel driving circuit 301 is electrically connected to the first end of the light-emitting unit 302, and the second end of the light-emitting unit 302 is electrically connected to the second power line 60.

[0118] Specifically, the second power line 60 is electrically connected to the driving chip. The pixel driving circuit 301 may include at least two transistors and at least one capacitor. Exemplarily, the pixel driving circuit 301 includes seven transistors and one capacitor. The light emitting unit 302 may be an organic light emitting diode or the like.

[0119] An embodiment of the present invention further provides a display test device for a display panel, wherein the display panel comprises a display area and a non-display area, wherein the display area comprises a brightness monitoring area and at least two display areas to be tested, wherein the at least two display areas to be tested are arranged in sequence along a first direction; the display panel further comprises a first power line and a driver chip disposed in the non-display area, wherein the driver chip and the at least two display areas to be tested are distributed along the first direction; wherein a first end of the first power line is connected to the driver chip to receive a first power signal; the first power line extends to the display area, and is used to provide a first power signal to sub-pixels in at least two display areas to be tested;

[0120] The brightness monitoring area is located on a side of a preset display area to be tested that is away from the first end of the first power line, or the brightness monitoring area is located within the preset display area to be tested and is located in a region of the preset display area to be tested that is away from the first end of the first power line; the preset display area to be tested is the display area to be tested that is farthest from the first end of the first power line, and the area of ​​the brightness monitoring area is smaller than a set value.

[0121] Fig.11 is a schematic diagram of a display test device for a display panel provided by an embodiment of the present invention, with reference to Fig.11 , the display test device includes:

[0122] The brightness acquisition module 210 is used to drive any display area to be tested to display a first preset gray scale, and drive the brightness monitoring area to display a second preset gray scale, while other display areas are not displayed, and acquire the brightness of the brightness monitoring area;

[0123] The uniformity determination module 220 is used to determine the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0124] Optionally, the uniformity determination module 220 is specifically used for:

[0125] The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

[0126] Optionally, the brightness acquisition module 210 is specifically used for:

[0127] Acquiring the brightness of the brightness monitoring area using an optical measuring device, wherein the minimum size of the brightness monitoring area is greater than or equal to the maximum size of the brightness acquisition area of ​​the measuring probe of the optical measuring device;

[0128] Optionally, the minimum size of the brightness monitoring area is greater than or equal to 4 mm and less than or equal to 20 mm;

[0129] Optionally, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical measuring device;

[0130] Optionally, the brightness monitoring area is circular in shape.

[0131] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0132] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display test method for a display panel, characterized in that: The display panel includes a display area and a non-display area, the display area includes a brightness monitoring area and at least two display areas to be tested, and the at least two display areas to be tested are arranged in sequence along a first direction; the display panel also includes a first power line and a driver chip arranged in the non-display area, and the driver chip and the at least two display areas to be tested are distributed along the first direction; wherein a first end of the first power line is connected to the driver chip to receive a first power signal; the first power line extends to the display area, and is used to provide a first power signal to sub-pixels in the at least two display areas to be tested; The brightness monitoring area is located on a side of a preset display area to be tested that is far away from the first end of the first power line, or the brightness monitoring area is located in the preset display area to be tested and is located in a region of the preset display area to be tested that is far away from the first end of the first power line; the preset display area to be tested is the display area to be tested that is farthest from the first end of the first power line, and the area of ​​the brightness monitoring area is smaller than the set area; The display testing method comprises: Driving any display area to be tested to display a first preset grayscale, and driving the brightness monitoring area to display a second preset grayscale, while other display areas do not display pictures, and obtaining the brightness of the brightness monitoring area; The brightness uniformity of the display panel is determined according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

2. The display testing method according to claim 1, characterized in that: Determining the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset grayscale includes: The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

3. The display testing method according to claim 1, characterized in that: Acquiring the brightness of the brightness monitoring area includes: Acquiring the brightness of the brightness monitoring area using an optical measuring device, wherein the minimum size of the brightness monitoring area is greater than or equal to the maximum size of the brightness acquisition area of ​​the measuring probe of the optical measuring device; Preferably, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical measuring device; Preferably, the shape of the brightness monitoring area is circular.

4. The display testing method according to claim 1, characterized in that: The non-display area includes a first non-display area; the first non-display area is located on a side of the preset display area to be tested away from the first end of the first power line, and the distance between the brightness monitoring area and the first non-display area is less than a preset distance; Preferably, the brightness monitoring area is adjacent to the first non-display area.

5. The display testing method according to claim 1, characterized in that: When the display area to be tested displays the first preset gray scale, the average brightness of the display area is equal to the average brightness of the brightness monitoring area when the display area to be tested displays the second preset gray scale; Preferably, the first preset grayscale and the second preset grayscale satisfy the following formula: A*L n1 =L n2 ; Where A is the ratio of the area of ​​the display area to be tested to the area of ​​the display area, L n1 is the brightness corresponding to the first preset grayscale n1, L n2 is the brightness corresponding to the second preset grayscale n2; Preferably, the first preset grayscale is 255, and the first preset grayscale and the second preset grayscale satisfy the following formula: A*L 255 =(n2 / 255) 2.2 *L 255 ; Among them, L 255 The brightness corresponding to 255 grayscale.

6. The display testing method according to claim 1, characterized in that: The at least two display areas to be tested have the same size; Preferably, the at least two display areas to be tested have the same shape; Preferably, the display area comprises a first edge and a second edge opposite to each other, the first edge and the second edge extend along the first direction; along the second direction, the distances between different display areas to be tested and the first edge are the same or different; wherein the first direction and the second direction intersect each other; Preferably, each of the display areas to be tested includes a plurality of pixel rows sequentially arranged along a first direction, and each of the pixel rows includes a plurality of sub-pixels sequentially arranged along a second direction.

7. The display testing method according to claim 6, characterized in that: The number of the display areas to be tested is 3, the width of each of the display areas to be tested along the second direction is equal to the width of the display area, and the brightness monitoring area is located within the preset display area to be tested; Alternatively, the display panel includes a first display area to be tested, a second display area to be tested, a third display area to be tested, a fourth display area to be tested and a fifth display area to be tested, the width of each of the display areas to be tested along the second direction is smaller than the width of the display area, the first display area to be tested, the second display area to be tested and the third display area to be tested are arranged in sequence along the first direction, the first display area to be tested, the second display area to be tested and the third display area to be tested are at the same distance from the first edge, the fourth display area to be tested and the fifth display area to be tested are located on both sides of the second display area to be tested along the second direction, and the brightness monitoring area is located on a side of the preset display area to be tested away from the first end of the first power line.

8. A display test device for a display panel, characterized in that: The display panel includes a display area and a non-display area, the display area includes a brightness monitoring area and at least two display areas to be tested, and the at least two display areas to be tested are arranged in sequence along a first direction; the display panel also includes a first power line and a driver chip arranged in the non-display area, and the driver chip and the at least two display areas to be tested are distributed along the first direction; wherein a first end of the first power line is connected to the driver chip to receive a first power signal; the first power line extends to the display area, and is used to provide a first power signal to sub-pixels in the at least two display areas to be tested; The brightness monitoring area is located on a side of a preset display area to be tested that is far away from the first end of the first power line, or the brightness monitoring area is located in the preset display area to be tested and is located in a region of the preset display area to be tested that is far away from the first end of the first power line; the preset display area to be tested is the display area to be tested that is farthest from the first end of the first power line, and the area of ​​the brightness monitoring area is smaller than a set value; The display testing device comprises: A brightness acquisition module, used to drive any display area to be tested to display a first preset gray scale, and drive the brightness monitoring area to display a second preset gray scale, while other display areas do not display, and acquire the brightness of the brightness monitoring area; The uniformity determination module is used to determine the brightness uniformity of the display panel according to the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

9. The display testing device according to claim 8, characterized in that: The homogeneity determination module is specifically used for: The brightness uniformity of the display panel is determined according to the ratio of the brightness of the brightness monitoring area when each of the display areas to be tested displays the first preset gray scale.

10. The display testing device according to claim 8, characterized in that: The brightness acquisition module is specifically used for: Acquiring the brightness of the brightness monitoring area using an optical measuring device, wherein the minimum size of the brightness monitoring area is greater than or equal to the maximum size of the brightness acquisition area of ​​the measuring probe of the optical measuring device; Preferably, the shape of the brightness monitoring area is the same as the shape of the brightness collection area of ​​the measuring probe of the optical measuring device; Preferably, the shape of the brightness monitoring area is circular.

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