A display panel detection device and a detection method thereof

Abstract

The application discloses a detection device and a detection method of a display panel. The detection device comprises a sensing module connected to a display panel, the sensing module being used for storing a reference gray scale voltage value; a comparison module connected to the sensing module, when the display panel is powered on, reading an initial gray scale voltage value of the display panel and a reference gray scale voltage value of the sensing module, and comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; and a burning module detachably connected to the display panel, when the initial gray scale voltage value is consistent with the reference gray scale voltage value, the burning module performing data burning on the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a detection device of display panel and a detection method thereof. BACKGROUND

[0002] With the development of communication technology, the taste of the public for display panels is getting higher and higher.

[0003] In the process of power on, the display panel is prone to display abnormal phenomenon, for example, the brightness corresponding to the gray scale voltage value of L0 is the same as the brightness corresponding to the gray scale voltage value of L255, that is, the gamma value of the gamma curve of L0 and L255 is equal to 2.2. Generally, the control board (CB) includes a power management integrated circuit (PMIC) and a timing control circuit (TCON). Generally, the reasons for the display panel display abnormality are as follows:

[0004] 1. When the display panel is powered on, the PMIC of the control board sends the corresponding gray scale voltage value (P-Gamma value) to the pattern generator (PG), however, due to the failure of the control board or other reasons, the pattern generator cannot read the gray scale voltage value transmitted by the PMIC;

[0005] 2. When the display panel is powered on, the PMIC of the control board sends the corresponding gray scale voltage value to the pattern generator, and the pattern generator reads the gray scale voltage value transmitted by the PMIC and sends the corresponding gray scale voltage value to the timing control circuit, however, due to the failure of the control board or other reasons, the timing control circuit cannot read the gray scale voltage value transmitted by the pattern generator.

[0006] Therefore, how to avoid the error of code in reading or transmitting the gray scale voltage value to cause the display panel to display abnormally is a technical problem to be solved at present. SUMMARY

[0007] The purpose of the present application is to provide a detection device of display panel and a detection method thereof, to solve the technical problem of avoiding the error of code in reading or transmitting the gray scale voltage value to cause the display panel to display abnormally.

[0008] To achieve the above object, the present application provides a display panel detection device, comprising: a sensing module connected to a display panel, the sensing module being used to store a reference gray scale voltage value; a comparison module connected to the sensing module, when the display panel is powered on, reading an initial gray scale voltage value of the display panel and the reference gray scale voltage value of the sensing module, and comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; and a burning module detachably connected to the display panel, when the initial gray scale voltage value is consistent with the reference gray scale voltage value, the burning module performing data burning on the display panel.

[0009] Further, the comparison module comprises: a reading unit used to read the initial gray scale voltage value of the display panel and the reference gray scale voltage value of the sensing module; a first comparison unit used to compare whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; and a lighting storage unit used to store the initial gray scale voltage value and the reference gray scale voltage value.

[0010] Further, the sensing module comprises: a detection unit used to detect a current brightness value of the display panel; a conversion unit used to calculate a corresponding current gray scale voltage value according to the current brightness value; a second comparison unit used to compare whether the current gray scale voltage value is consistent with the reference gray scale voltage value; and a sensing storage unit used to store the reference gray scale voltage value, the current brightness value and the current gray scale voltage value.

[0011] Further, the display panel detection device further comprises: a timing control module connected to the display panel and the comparison module, used to drive the display panel to work.

[0012] Further, the timing control module comprises a power supply circuit unit, a control unit and a storage unit, the power supply circuit unit being electrically connected to the control unit and the storage unit, used to supply power for the control unit and the storage unit.

[0013] To achieve the above object, the present application further provides a display panel detection method, comprising the following steps: setting a reference gray scale voltage value; when a display panel is powered on, reading an initial gray scale voltage value of the display panel and the reference gray scale voltage value; comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; when the initial gray scale voltage value is consistent with the reference gray scale voltage value, performing data burning on the display panel.

[0014] Further, in the step of reading the initial gray scale voltage value of the display panel when the display panel is powered on, the initial gray scale voltage value of the display panel is read at least twice.

[0015] Further, after the step of comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, when there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, the failure of the display panel is checked.

[0016] Further, in the step of comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, the difference is ±10% of the difference between the initial gray scale voltage value and the reference gray scale voltage value.

[0017] Further, in the step of comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, when there is no difference between the initial gray scale voltage value and the reference gray scale voltage value, the driving chip of the display panel is subjected to single-time programmable burning.

[0018] Further, after the step of performing data burning on the display panel, the current brightness value of the display panel is detected, and a corresponding current gray scale voltage value is calculated according to the current brightness value; whether the current gray scale voltage value is consistent with the reference gray scale voltage value is compared; and if not, the failure of the display panel is checked.

[0019] The technical effect of the present application is to provide a display panel detection device and a detection method thereof. The control module controls the display panel to start up, increases the read-back process of the comparison module on the display panel and the sensing module, and preliminarily judges whether the initial gray scale voltage value of the display panel is normal, so as to avoid errors in reading the gray scale voltage value.

[0020] Further, by calculating a corresponding current gray scale voltage value according to the current brightness value in the sensing module, and comparing whether the current gray scale voltage value is consistent with the reference gray scale voltage value, it can be detected whether the driving chip of the display panel is normally burned, errors in data transmission are avoided, and the display quality of the display panel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The technical solutions and other beneficial effects of the present application will become apparent from the following detailed description of specific embodiments of the present application, combined with the accompanying drawings.

[0022] Figure 1 The structural schematic diagram of the display panel detection device provided by the embodiments of the present application is shown.

[0023] Figure 2 The flowchart of the display panel detection method provided by the embodiments of the present application is shown.

[0024] The components in the drawings are identified as follows:

[0025] 1. Display panel; 2. Sensing module;

[0026] 3. Comparison module; 4. Timing control module;

[0027] 5. Programming module;

[0028] 11. Driver chip; 21. Detection unit;

[0029] 22. Conversion Unit; 23. Second Comparison Unit;

[0030] 24. Sensing storage unit; 31. Reading unit;

[0031] 32. First comparison unit; 33. Lamp storage unit;

[0032] 41. Power supply circuit unit; 42. Control unit;

[0033] 43. Storage unit. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] like Figure 1 As shown, this embodiment provides a detection device for a display panel 1, including a sensing module 2, a comparison module 3, a timing control module 4, and a programming module 5. The timing control module 4 is connected to the display panel 1 and the comparison module 3, and is used to drive the display panel 1 to work.

[0037] The sensing module 2 is connected to a display panel 1, which is the display panel to be detected. The sensing module 2 is used to store reference grayscale voltage values.

[0038] The comparison module 3 is connected to the sensing module 2. When the display panel 1 is powered on, the comparison module 3 reads the initial gray scale voltage value of the display panel 1 and the reference gray scale voltage value of the sensing module 2, and compares whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value.

[0039] The burning module 5 is detachably connected to the display panel 1. When the initial gray scale voltage value of the display panel 1 is consistent with the reference gray scale voltage value, the burning module 5 performs data burning on the display panel 1. When there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, the display panel 1 is checked for failure. In short, the control module controls the display panel 1 to be powered on by increasing the reading process of the comparison module 3 on the display panel 1 and the sensing module 2, and then preliminarily judges whether the initial gray scale voltage value of the display panel 1 is normal, so as to avoid errors in reading the gray scale voltage value. It should be noted that the comparison module 3 reads the initial gray scale voltage value of the display panel 1 at least twice, so that the comparison module 3 can obtain the initial gray scale voltage value of the display panel 1. If the comparison module 3 reads for 5 times, and the initial gray scale voltage value of the display panel 1 obtained by the comparison module 3 still has a difference with the reference gray scale voltage value, the display panel 1 is checked for failure.

[0040] It should be noted that the failure of the display panel 1 can include failure of the circuit of the display panel 1, wear of the display panel 1, failure of the lighting fixture, operation failure of personnel, and the like, which are not described here.

[0041] In the embodiment, the comparison module 3 is a picture generator (PG), which includes a reading unit 31, a first comparison unit 32, and a lighting storage unit 33.

[0042] Specifically, the reading unit 31 is configured to read the initial gray scale voltage value of the display panel 1 and the reference gray scale voltage value of the sensing module 2. The first comparison unit 32 is configured to compare whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value, the difference being ±10% of the difference between the initial gray scale voltage value and the reference gray scale voltage value. For example, the initial gray scale voltage value is 1V and the reference gray scale voltage value is -2V, the difference between the initial gray scale voltage value and the reference gray scale voltage value is 1-(-2)=3V, that is, the difference between the initial gray scale voltage value and the reference gray scale voltage value is in the range of 3V±10% (i.e. 2.7V-3.3V), and the initial gray scale voltage value is 1V, which is not in the range, so there is a difference between the initial gray scale voltage value and the reference gray scale voltage value. Conversely, if the initial gray scale voltage value and the reference gray scale voltage value are in the range, there is no difference between the initial gray scale voltage value and the reference gray scale voltage value. It should be noted that the above-mentioned voltage values are only used for illustration, and those skilled in the art can adjust them according to the actual process, which is not particularly limited herein. In this embodiment, the light-on storage unit 33 is configured to store the initial gray scale voltage value and the reference gray scale voltage value.

[0043] After the single data programming of the driving chip 11 of the display panel 1, the sensing module 2 is configured to detect the current brightness value of the display panel 1, calculate the corresponding current gray scale voltage value according to the current brightness value, and compare whether the current gray scale voltage value is consistent with the reference gray scale voltage value. When the current gray scale voltage value is consistent with the reference gray scale voltage value, the display picture of the display panel 1 is normal; when the current gray scale voltage value is not consistent with the reference gray scale voltage value, the display panel 1 is checked for failure. It should be noted that each gray scale voltage value has a corresponding gray scale parameter, which can be referred to in the prior art and will not be described herein.

[0044] In this embodiment, by calculating the corresponding current gray scale voltage value according to the current brightness value in the sensing module 2 and comparing whether the current gray scale voltage value is consistent with the reference gray scale voltage value, it can be detected whether the driving chip 11 of the display panel 1 is normally programmed, data transmission errors are avoided, and the display quality of the display panel 1 is improved. It should be noted that the driving chip 11 is a source driving chip 11.

[0045] In this embodiment, the sensing module 2 is a sensor board, which includes a detection unit 21, a conversion unit 22, a second comparison unit 23, and a sensing storage unit 24.

[0046] Specifically, the detection unit 21 is used to detect the current brightness value of the display panel 1. The conversion unit 22 calculates the corresponding current grayscale voltage value based on the current brightness value. The second comparison unit 23 is used to compare whether the current grayscale voltage value is consistent with the reference grayscale voltage value. The sensing storage unit 24 is used to store the reference grayscale voltage value, the current brightness value, and the current grayscale voltage value.

[0047] In this embodiment, the timing control module 4 includes a power supply circuit unit 41, a control unit 42, and a storage unit 43.

[0048] The power supply circuit unit 41 is electrically connected to the control unit 42 and the storage unit 43, and is used to supply power to the control unit 42 and the storage unit 43.

[0049] like Figure 2 As shown, this embodiment also provides a method for detecting a display panel, including the following steps S1)-S8).

[0050] S1) Set the reference grayscale voltage value.

[0051] Specifically, reference grayscale voltage values ​​are stored within the sensing module.

[0052] S2) When a display panel is powered on, read the initial grayscale voltage value of the display panel.

[0053] When the display panel is powered on, the comparison module reads the initial grayscale voltage value of the display panel and the reference grayscale voltage value of the sensing module.

[0054] S3) Compare the initial grayscale voltage value with the reference grayscale voltage value to see if there is a difference;

[0055] If so, then execute S4) When the initial grayscale voltage value is consistent with the reference grayscale voltage value, perform data burning on the display panel;

[0056] If not, proceed to S8) When there is a difference between the initial grayscale voltage value and the reference grayscale voltage value, check for faults in the display panel.

[0057] Specifically, in the comparison module compares the initial gray scale voltage value and the reference gray scale voltage value whether there is difference, when the initial gray scale voltage value and the reference gray scale voltage value does not exist difference, to the display panel's driving chip is single time programmable burning, namely enters step S4);When the initial gray scale voltage value and the reference gray scale voltage value exists difference, check the display panel's failure, namely enters step S8)。Wherein, the difference is the initial gray scale voltage value and the reference gray scale voltage value between difference value's ±10%.Simply speaking, the control module in control the display panel in start-up, by increasing to the comparison module to the display panel and the sensing module's back reading process, then preliminary judgment the initial gray scale voltage value of the display panel is normal, thereby avoiding gray scale voltage value in reading error.It is need to explain that, the comparison module at least twice reads the initial gray scale voltage value of the display panel, to make the comparison module can obtain the initial gray scale voltage value of the display panel.If the comparison module after 5 times reading, the comparison module still the initial gray scale voltage value of the display panel, then check the display panel's failure.

[0058] S5)detect the current brightness value of the display panel, and according to the current brightness value, calculate the corresponding current gray scale voltage value.

[0059] Specifically, through the sensing module detects the current brightness value of the display panel, and according to the current brightness value, calculate the corresponding current gray scale voltage value.

[0060] S6) compare the current gray scale voltage value and the reference gray scale voltage value whether consistent;

[0061] If yes, then execute S7) determine the display panel's display picture is normal;

[0062] If not, then execute S8) when the initial gray scale voltage value and the reference gray scale voltage value exists difference, check the display panel's failure.

[0063] The embodiment is through in sensing module, according to the current brightness value, calculate the corresponding current gray scale voltage value, and compare the current gray scale voltage value and the reference gray scale voltage value whether consistent, thus, can detect the display panel's driving chip whether normal burning, avoid data transmission error, thereby improve the display quality of the display panel.

[0064] The detection device and the detection method of the display panel provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions of the present application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A detection device for a display panel, characterized in that, comprising: a sensing module connected to a display panel, the sensing module being configured to store a reference gray scale voltage value; a comparison module connected to the sensing module, the comparison module being configured to read an initial gray scale voltage value of the display panel and the reference gray scale voltage value of the sensing module when the display panel is powered on, and compare whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; and a burning module detachably connected to the display panel, the burning module being configured to perform data burning on the display panel when the initial gray scale voltage value is consistent with the reference gray scale voltage value, and check a fault of the display panel when there is a difference between the initial gray scale voltage value and the reference gray scale voltage value.

2. The display panel inspection apparatus according to claim 1, wherein The comparison module comprises: a reading unit configured to read the initial gray scale voltage value of the display panel and the reference gray scale voltage value of the sensing module; a first comparison unit configured to compare whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; and a light-on storage unit configured to store the initial gray scale voltage value and the reference gray scale voltage value.

3. The detection device of the display panel according to claim 1, wherein the sensing module comprises: a detection unit configured to detect a current brightness value of the display panel; a conversion unit configured to calculate a corresponding current gray scale voltage value according to the current brightness value; a second comparison unit configured to compare whether the current gray scale voltage value is consistent with the reference gray scale voltage value; and a sensing storage unit configured to store the reference gray scale voltage value, the current brightness value and the current gray scale voltage value.

4. The display panel inspection apparatus according to claim 1, wherein Further comprising: a timing control module connected to the display panel and the comparison module, the timing control module being configured to drive the display panel to work.

5. The detection device of the display panel according to claim 4, wherein the timing control module comprises a power supply circuit unit, a control unit and a storage unit, the power supply circuit unit being electrically connected to the control unit and the storage unit, and being configured to supply power to the control unit and the storage unit.

6. A method for detecting a display panel, characterized in that, comprising the following steps: setting a reference gray scale voltage value; reading an initial gray scale voltage value of a display panel and the reference gray scale voltage value when the display panel is powered on; comparing whether there is a difference between the initial gray scale voltage value and the reference gray scale voltage value; performing data burning on the display panel when the initial gray scale voltage value is consistent with the reference gray scale voltage value, and checking a fault of the display panel when there is a difference between the initial gray scale voltage value and the reference gray scale voltage value.

7. The method of claim 6, wherein the display panel is a liquid crystal display panel. In the step of reading the initial gray scale voltage value of the display panel when the display panel is powered on, the initial gray scale voltage value of the display panel is read at least twice.

8. The detection method of the display panel according to claim 6, wherein after the step of performing data burning on the display panel, further comprising: detecting a current brightness value of the display panel, and calculating a corresponding current gray scale voltage value according to the current brightness value; comparing whether the current gray scale voltage value is consistent with the reference gray scale voltage value. If not, a failure of the display panel is checked.

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