Debugging method and manufacturing method of display device, and display device

Abstract

The application discloses a display device debugging method and manufacturing method, and a display device, and belongs to the technical field of display. The debugging method comprises the following steps: obtaining an actual voltage value of a first power signal line when a driving transistor of a display panel works in a saturation zone at a first target brightness level, and recording the actual voltage value as A; inputting the A value to the first power signal line in the display panel; reading a first actual data voltage value on a data line in the display panel at this time; and re-finding a first actual gray scale value corresponding to the first actual data voltage value from a gamma curve. The manufacturing method of the display device comprises the following steps: after the above-mentioned debugging method is completed, a driving chip which is burned is electrically connected with the display device, so that the display device is formed. The display device comprises the display device manufactured according to the above-mentioned manufacturing method. The application is beneficial to guaranteeing the overall display effect of the display device, and can effectively save power consumption.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to a debugging method and manufacturing method for a display device, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) possess characteristics such as self-illumination, fast response, wide color gamut, wide viewing angle, and high brightness. They can be used to fabricate thin and flexible display devices, and are thus gradually becoming a key research focus in the field of display technology. OLEDs require current to drive them. In display applications, driving transistors in the pixel circuit are controlled to provide driving current to the OLEDs, enabling them to emit light. Furthermore, a stable driving current is needed to ensure display performance during application.

[0003] In the field of electronic products, power consumption has always been a performance concern for users. Although OLED display devices have outstanding advantages, they also have disadvantages, such as high power consumption. As OLED displays gradually move towards higher PPI (Pixels Per Inch, the number of pixels per inch; the higher the PPI value, the higher the density at which the display can show images), reducing power consumption becomes even more important.

[0004] Therefore, how to ensure the display effect of OLED display devices while saving power consumption is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a debugging method and manufacturing method for a display device, and a display device, to solve the problem of high power consumption in existing OLED display devices.

[0006] This invention discloses a debugging method for a display device. The display device includes a display panel and a driver chip. The display panel includes at least a plurality of driver transistors and a plurality of first power signal lines. The debugging method includes: acquiring the gamma curves corresponding to different grayscale values ​​of the display panel; powering on the display panel and inputting a first fixed voltage value to the first power signal lines to illuminate the display panel; finding the first theoretical gamma value corresponding to 255 grayscale brightness at a first target brightness level in the gamma curve and writing the first theoretical gamma value into the display panel; inputting a starting voltage value to the first power signal lines; and, based on the starting voltage value, decreasing the voltage value input to the first power signal lines by an amplitude of ΔV, and detecting the brightness change of the display panel. The initial voltage value is the theoretical voltage value of the first power signal line when the driving transistor in the display panel is operating in the non-saturation region. When the brightness change rate of the display panel is less than 5%, the voltage value input to the first power signal line is denoted as value A. Value A is the actual voltage value of the first power signal line when the driving transistor in the saturation region is operating at the first target brightness level. Value A is input to the first power signal line in the display panel, and the first actual data voltage value on the data line in the display panel is read. The first actual grayscale value corresponding to the first actual data voltage value is found again from the gamma curve. Value A, the first actual data voltage value corresponding to value A, and the first actual grayscale value are burned into the driver chip.

[0007] Based on the same inventive concept, the present invention also discloses a method for manufacturing a display device, the method comprising: completing the above-mentioned debugging method; and binding and electrically connecting the programmed driver chip to the display device to form a display device.

[0008] Based on the same inventive concept, the present invention also discloses a display device, which includes a display device manufactured according to the above-described manufacturing method.

[0009] Compared with the prior art, the debugging method and manufacturing method of the display device and the display device provided by the present invention achieve at least the following beneficial effects:

[0010] This invention provides a debugging method for a display device. The display device using this debugging method includes a display panel and a driver chip. After the debugging method is completed, the driver chip can be bonded to the display panel, making the driver chip electrically connected to the display panel to form a display device. The display panel may include multiple driving transistors and multiple first power signal lines. The driving transistors, as part of the pixel circuit, need to be electrically connected to the first power signal lines in the display panel. The first power signal lines can be understood as negative power signal lines, used to provide a negative power signal for the pixel circuit of each sub-pixel. Through the debugging method provided by this invention, after the driver chip with the burned signal value is bonded to the bonding area of ​​the display panel, when the display panel needs to display a first target brightness level of 255 grayscale, the voltage value provided by the driver chip to the first power signal lines in the display panel is value A, and the data voltage signal provided to the data lines is the first actual data voltage value. That is, the driver chip can provide the required actual first power signal to the driving transistors in the display panel in the saturation operating area, rather than the theoretical voltage value that may originally be smaller than value A. The debugging method for the display device provided by this invention can, based on the characteristics of each display panel itself, such as the performance of the driving transistors operating in the saturation working region, debug to obtain the required A value on the first power signal line corresponding to the 255 grayscale brightness at the first target brightness level of the display panel, as well as the first actual gamma value corresponding to the A value. This provides a more accurate debugging process for the driving signal value subsequently burned into the driving chip, enabling the display device subsequently bound to the driving chip to display the 255 grayscale brightness at the first target brightness level through the actual first power signal value, i.e., the A value, and the first actual gamma value provided by the driving chip during the display process. This helps to ensure the overall display effect of the display device while also effectively saving power consumption.

[0011] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0012] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0014] Figure 1 This is a schematic diagram of the planar structure of a display device employing the debugging method provided in the embodiments of the present invention;

[0015] Figure 2 This is a flowchart of the debugging method provided in an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the brightness response curve of a typical display device;

[0017] Figure 4 yes Figure 3 A schematic diagram of the response curve and the reference exponent curve after normalization;

[0018] Figure 5 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0019] Figure 6 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0020] Figure 7 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0021] Figure 8 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0022] Figure 9 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0023] Figure 10 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0024] Figure 11 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0025] Figure 12 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0026] Figure 13 This is another flowchart of the debugging method provided in the embodiment of the present invention;

[0027] Figure 14 This is a flowchart of a method for manufacturing a display device according to an embodiment of the present invention. Detailed Implementation

[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0031] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0032] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] Please refer to the reference. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the planar structure of a display device employing the debugging method provided in an embodiment of the present invention. Figure 2 This is a flowchart of a debugging method provided in an embodiment of the present invention. The embodiment provides a debugging method for a display device. The display device 000 using this debugging method includes a display panel 10 and a driver chip 20. The display panel 10 includes at least a plurality of driving transistors 101 and a plurality of first power signal lines 102. The debugging method includes:

[0035] Obtain the gamma curves of display panel 10 at different grayscale values;

[0036] When the display panel 10 is powered on, a first fixed voltage value is input to the first power signal line 102, and the display panel 10 is lit up. In the gamma curve, the first theoretical gamma value corresponding to the 255 gray level brightness of the display panel 10 at the first target brightness level is found, and the first theoretical gamma value is written into the display panel 10.

[0037] A starting voltage value is input to the first power signal line 102. Based on the starting voltage value, the voltage value input to the first power signal line 102 is decreased by ΔV, and the brightness change of the display panel 10 is detected. The starting voltage value is the theoretical voltage value of the first power signal line 102 when the driving transistor 101 in the display panel 10 is working in the non-saturation region.

[0038] When the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 is recorded as value A. Value A is the actual voltage value of the first power signal line 102 when the drive transistor 101 is working in the saturation region at the first target brightness level of the display panel 10.

[0039] Input the value A to the first power signal line 102 in the display panel 10, read the first actual data voltage value on the data line S in the display panel 10 at this time, and find the first actual grayscale value corresponding to the first actual data voltage value from the gamma curve.

[0040] The value of A, along with the corresponding first actual data voltage value and first actual grayscale value, are programmed into the driver chip 20.

[0041] Specifically, this embodiment provides a debugging method for a display device. The display device 000 using this debugging method includes a display panel 10 and a driver chip 20 (e.g., ...). Figure 1 As shown, the display panel 10 includes a bonding area BA. The driver chip 20 needs to be bonded to the bonding area BA of the display panel 10 after the debugging method is completed, so that the driver chip 20 and the display panel 10 are electrically connected to form a display device 000. It can be understood that the driver chip 20 and the display panel 10 are not bonded before the debugging method of this embodiment is completed. That is, the debugging method provided in this embodiment is performed before the driver chip 20 is bonded to the bonding area BA of the display panel 10. The display panel 10 of this embodiment can be an organic light-emitting diode display panel. The display panel 10 can include multiple sub-pixels 00, multiple scan lines G, multiple data lines S, multiple driving transistors 101, and multiple first power signal lines 102. The sub-pixels 00 include at least driving transistors 101, or may also include light-emitting elements 103. The light-emitting elements 103 can be organic light-emitting diodes. Organic light-emitting diodes are current-driven elements, and corresponding pixel circuits need to be set to provide driving current to the light-emitting elements 103 so that the light-emitting elements can emit light. The driving transistor 101, as part of the pixel circuit, needs to be electrically connected to the first power signal line 102 in the display panel 10. In this embodiment, the first power signal line 102 can be understood as a negative power signal line, used to provide a negative power signal to the pixel circuit of each sub-pixel 00. The first power signal line 102 is generally electrically connected to the cathode of the light-emitting element 103. The display panel 10 may also include multiple second power signal lines (not shown in the figure). The second power signal lines can be understood as positive power signal lines, used to provide a positive power signal to the pixel circuit of each sub-pixel 00. It should be noted that this embodiment does not elaborate on the structure of the display panel 10. In specific implementations, the structure of the display panel 10 includes, but is not limited to, those described in detail. Figure 1The structure shown may also include other structures capable of realizing display functions; for details, please refer to the structure of organic light-emitting diode display panels in related technologies for understanding. The structure of the pixel circuit of sub-pixel 00 in this embodiment includes, but is not limited to, [the following structures]. Figure 1 The structure shown may also include other transistor structures, which will not be described in detail in this embodiment. Figure 1 This is merely an illustration of the structure of the driving transistor 101 and the first power signal line 102 mentioned in this embodiment.

[0042] In related technologies, during the manufacturing process of a display device, the first power signal value burned into the driver chip needs to be adjusted to obtain a suitable first power signal value for burning into the driver chip. After the driver chip is subsequently bonded to the display panel, the operating performance of the display device is optimized. The existing adjustment process typically involves adjusting a small number of display panels to obtain a fixed first power signal value. For example, adjusting 100 display panels might yield a first power signal value of -3.7V for one panel at a certain brightness, and -3.8V for another panel at the same brightness. Furthermore, because the characteristics of the driver transistors in mass-produced display panels may fluctuate after mass production, a redundancy value of 0.3V is generally added, meaning a fixed value of -4V is typically used as the required first power signal value for that specific brightness level. However, in practical applications, the first power signal value required by the driving transistor in the display panel in the saturation operating region may only be -3V, while the original driving chip is set to -4V. After binding the driving chip, the value transmitted to the first power signal line is indeed -4V, resulting in a waste of 1V of power consumption. Taking a display brightness of 800 nits as an example, the expected driving current is 360mA (the higher the brightness, the greater the current), thus equivalent to a waste of 360mV (1V × 360mA) of power consumption. It is understandable that when the driving transistor is in the saturation operating region, |Vgs - Vth| ≤ |Vds|, thus ensuring that the driving transistor can generate driving current normally during the light-emitting stage of the pixel circuits included in the subsequent sub-pixels. Here, Vgs is the voltage difference between the gate and source of the driving transistor, Vth is the threshold voltage of the driving transistor, and Vds is the voltage difference between the source and drain of the driving transistor.

[0043] To address the aforementioned problems, this embodiment provides a debugging method for a display device, the debugging method comprising:

[0044] J11: Obtain the gamma curve corresponding to different grayscale values ​​of the display panel 10. The gamma curve is preset according to the characteristics of the display panel 10. Through the preset process, the data voltage value corresponding to different grayscale values ​​of the display panel 10 can be obtained. The data voltage is the data voltage value provided by the data line S in the display panel 10 to the sub-pixel 00. In the gamma curve graph, the horizontal axis generally represents the grayscale value and the vertical axis represents the data voltage value. That is, the relationship between the data voltage value and the grayscale value shown in the gamma curve is V = f(g), where V is the data voltage value, g is the grayscale value, and f is the relationship between the two. This relationship is the gamma relationship. Adjusting the grayscale value means adjusting the size of the data voltage value. Different data voltage values ​​represent different brightness.

[0045] Optional, such as Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the brightness response curve of a typical display device. Figure 4 yes Figure 3 A schematic diagram of the response curve and the reference exponent curve after normalization. Figure 3 In the curve shown, the horizontal axis represents the grayscale value, and the vertical axis represents the display brightness. After normalizing the curve, we get... Figure 4 The gamma curve shown shows that the response curve is similar to the exponential function curve y = x. 2.2 The gamma curves of the display device are very close; therefore, the gamma curve of the display device can be represented by an exponential function y = x. γ Here, γ is the gamma coefficient, which is essentially the power of an exponential function. Different display devices have different gamma coefficient requirements. Traditional cathode ray tube (CRT) display devices typically have a gamma coefficient of 2.2 because this display characteristic is more suitable for human vision. If the gamma coefficient is too large, the overall image will appear darker, and details in dark scenes will be easily lost; if the gamma coefficient is too small, the overall image will appear brighter, becoming blurry and lacking depth. This embodiment uses a gamma coefficient of 2.2 as an example for illustration.

[0046] J12: The display panel 10 is powered on, and a first fixed voltage value is input to the first power signal line 102. It is understood that this first fixed voltage value is not provided by the driver chip 20 to the first power signal line 102 in the display panel 10, but is directly provided to the first power signal line 102 in the display panel 10 through an external signal source. Optionally, other signal lines in the display panel 10, such as the second power signal line, also receive positive power signals at this time, so that the display panel 10 illuminates. Then, in the gamma curve, the first theoretical gamma value corresponding to the 255 grayscale brightness at the first target brightness level of the display panel 10 is found, and the first theoretical gamma value is written into the display panel 10. The first target brightness level can be understood as the display panel 10 having multiple brightness levels. For example, the brightness levels that the display panel 10 can display can be divided into multiple brightness levels (from high brightness to low brightness) such as 800 nits, 600 nits, 380 nits, 150 nits, 75 nits, 30 nits, 16 nits, 6.5 nits, and 2 nits. Optionally, the first target brightness level includes the highest target brightness level of the display panel 10. That is, in this embodiment, the first target brightness level is the highest target brightness level of 800 nits among the brightness levels that the display panel 10 can display, which is used as an example for illustration. In specific implementation, the first target brightness level can also be other brightness levels. The grayscale range that the display panel 10 can output is selected as 256 grayscale levels. 256 grayscale levels are the 0-255 grayscale levels of the display panel 10. Therefore, the 255 grayscale brightness of the display panel 10 at the first target brightness level can be understood as the highest grayscale brightness of the display panel 10 at the highest target brightness level. The first theoretical gamma value corresponding to 255 grayscale brightness at the first target brightness level can be found from the preset gamma curve. Optionally, the found first theoretical gamma value includes a first theoretical data voltage value and a first theoretical grayscale value. In the debugging method provided in this embodiment, writing the first theoretical gamma value to the display panel 10 can be done by writing the first theoretical data voltage value to the data line S in the display panel 10, so that the theoretical luminous brightness of the display panel 10 is 255 grayscale brightness at the first target brightness level.

[0047] J13: Input the initial voltage value to the first power signal line 102. Optionally, this initial voltage value is the theoretical voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is operating in the non-saturation region. Optionally, the initial voltage value can be set to be greater than the actual value of the first power signal obtained in subsequent debugging. That is, assuming that the actual voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is operating in the saturation region is -4V, then the initial voltage value input to the first power signal line 102 is the voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is operating in the non-saturation region, such as -2V or other values ​​other than -4V (an initial voltage value greater than -4V). Then, based on the initial voltage value, with ΔV as the amplitude, ΔV can be understood as a decreasing value. The voltage value input to the first power signal line 102 is decreased by ΔV each time, and the brightness change of the display panel 10 is detected by a brightness detection device. Optionally, this embodiment does not specifically limit the brightness detection device, as long as it can detect the brightness change value of the display panel 10 under different voltage values ​​of the first power signal line 102. The value of ΔV can be set according to the actual needs of amplitude reduction, and this embodiment does not limit it.

[0048] J14: During the process of detecting the brightness change of the display panel 10 by decreasing the voltage value of the first power signal line 102 by ΔV each time, when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 is recorded as value A. Value A is the actual voltage value of the first power signal line 102 when the display panel 10 is in the saturation region at the first target brightness level (if the first target brightness level is the highest target brightness level among the brightness levels that the display panel 10 can display, then value A corresponds to the highest target brightness level among the brightness levels that the display panel 10 can display). In other words, it can be understood that the actual voltage value required for the first power signal line 102 when the display panel 10 is in the saturation region at the first target brightness level is value A obtained by the debugging method provided in this embodiment.

[0049] J15: At this time, the A value obtained from the debugging is input to the first power signal line 102 in the display panel 10. The first actual data voltage value on the data line S in the display panel 10 is read. Then, the first actual grayscale value (the horizontal axis value of the gamma curve) corresponding to the first actual data voltage value (the vertical axis value of the gamma curve) is found again from the gamma curve. The obtained first actual data voltage value and first actual grayscale value can be understood as the first actual gamma value, that is, the first actual gamma value is the gamma value corresponding to 255 grayscale brightness of the display panel 10 at the first target brightness level. Thus, the first actual gamma value (including the first actual data voltage value and the first actual grayscale value) required by the display panel 10 when the driving transistor 101 is working in the saturation region at the first target brightness level can be obtained.

[0050] J16: Finally, the A value obtained during the above debugging process, as well as the first actual data voltage value and the first actual grayscale value corresponding to the A value, are burned into the driver chip 20.

[0051] Using the debugging method described above in this embodiment, after the driver chip 20 with the burned signal value is subsequently bound to the binding area BA of the display panel 10, when the display panel 10 needs to display the 255 grayscale brightness of the first target brightness level, the voltage value provided by the driver chip 20 to the first power signal line 102 in the display panel 10 is the value A, and the data voltage signal provided to the data line S is the first actual data voltage value. That is, the driver chip 20 can provide the required actual first data voltage value to the driving transistor 101 in the display panel 10 in the saturation working area. If a power signal, such as -3V, is used instead of a theoretical voltage value that may be smaller than the value of A, such as -4V, and the first target brightness level is the highest target brightness level of 800 nits among the brightness levels that the display panel 10 can display (the driving current is expected to be 360mA), then 360mW of power consumption can be saved, that is, 360mV×(4V-3V) power consumption. This means that after the driver chip 20 is subsequently bound and burned, the display effect of the display device 000 in this embodiment can be guaranteed, while the display power consumption of the display device 000 can be greatly reduced.

[0052] The debugging method for the display device 000 provided in this embodiment can, based on the characteristics of each display panel 10 itself, such as the performance of the driving transistor 101 operating in the saturation working area, debug to obtain the required A value on the first power signal line 102 corresponding to the 255 grayscale brightness at the first target brightness level and the first actual gamma value corresponding to the A value. This provides a more accurate debugging process for the driving signal value subsequently burned into the driving chip 20, so that the display device 000 subsequently bound to the driving chip 20 can display the 255 grayscale brightness at the first target brightness level through the actual first power signal value, i.e., the A value and the first actual gamma value provided by the driving chip 20 during the display process. This is beneficial to ensure the overall display effect of the display device 000 while also effectively saving power consumption.

[0053] It should be noted that the figures in this embodiment are only illustrative of the structure of the display device 000. In actual implementation, the structure of the display device 000 includes, but is not limited to, this, and may also include other structures that can realize the display function. This embodiment will not elaborate on these details.

[0054] It is understood that the debugging method of the display device 000 provided in this embodiment includes, but is not limited to, the above process. It may also include other processes that can obtain driving signal values ​​that match the performance of the display panel 10. This embodiment is only used as an example to illustrate how the display panel 10 is debugged at the first target brightness level to obtain the A value that matches the performance of the display panel 10 itself, as well as the first actual data voltage value and the first actual grayscale value corresponding to the A value. In specific implementation, it may also include the debugging process of the display panel 10 at other brightness levels. For details, please refer to the following embodiments for understanding. This embodiment will not elaborate on it here.

[0055] It should be further noted that, in this embodiment, when the driver chip 20 is bonded to the bonding area BA of the display panel 10, the first power signal line 102 and data line S in the display panel 10 need to be electrically connected to the driver chip 20 through the conductive pads (not shown in the figure) of the bonding area BA. Figure 1 The electrical connection between the first power signal line 102 and the data line S and the driver chip 20 is not illustrated in the figure. In specific implementation, structures such as fan-out lines can be used to realize the electrical connection between the first power signal line 102 and the data line S of the display panel 10 and the driver chip 20, so as to ensure that the driver chip 20 provides driving signals for the above signal lines. This embodiment does not limit the connection structure of the two, and the connection structure in the related technology can be referred to for understanding.

[0056] Optionally, in this embodiment, a starting voltage value is input to the first power signal line 102. Based on this starting voltage value, with ΔV as the amplitude, the voltage value input to the first power signal line 102 is decreased by ΔV each time. The brightness change of the display panel 10 is detected by a brightness detection device. When the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 at this time is recorded as value A, where ΔV ≤ 0.1V. That is, the magnitude of ΔV can be less than or equal to 0.1V. Generally, the step size of the first power signal value of the negative power signal of the driver chip is generally 0.1V. That is, according to the nature of the driver chip, ΔV can be selected to be equal to 0.1V, and the voltage value input to the first power signal line 102 is decreased by 0.1V each time. Alternatively, ΔV can also be less than 0.1V. The smaller the decrease in amplitude, the more accurate the negative power signal value of the first power signal line 102 obtained during the operation of the driver transistor 101 in the saturation operating region can be, which is beneficial to improving the accuracy of the obtained value A.

[0057] Optionally, the first power signal line 102 in this embodiment can be understood as a negative power signal line, used to provide a negative power signal for the pixel circuit of each sub-pixel 00. The first power signal line 102 is generally electrically connected to the cathode of the light-emitting element 103. Then, when the display panel 10 obtained by the above debugging method is in the first target brightness level and the driving transistor 101 is working in the saturation region, the A value of the first power signal line 102 is negative.

[0058] In some alternative embodiments, please refer to the references. Figure 1 and Figure 5 , Figure 5 This is another flowchart of the debugging method provided in this embodiment of the invention. The debugging method provided in this embodiment includes:

[0059] J21: Obtain the gamma curve corresponding to different grayscale values ​​of the display panel 10. The gamma curve is preset according to the characteristics of the display panel 10. Through the preset process, the data voltage value corresponding to different grayscale values ​​of the display panel 10 can be obtained. The data voltage is the data voltage value provided by the data line S in the display panel 10 to the sub-pixel 00. In the gamma curve graph, the horizontal axis generally represents the grayscale value and the vertical axis represents the data voltage value. Adjusting the grayscale value means adjusting the magnitude of the data voltage value. Different data voltage values ​​represent different brightness.

[0060] J22: When the display panel 10 is powered on, a first fixed voltage value is input to the first power signal line 102. It can be understood that this first fixed voltage value is not provided by the driver chip 20 to the first power signal line 102 in the display panel 10, but is directly provided to the first power signal line 102 in the display panel 10 through an external signal source. Optionally, at this time, other signal lines in the display panel 10, such as the second power signal line, are also input with positive power signals so that the display panel 10 can light up.

[0061] In the gamma curve, the first theoretical gamma value corresponding to 255 grayscale brightness at the first target brightness level of the display panel 10 is found, and the first theoretical gamma value is written into the display panel 10, specifically including:

[0062] J221: The brightness of the display panel 10 is detected by an optical probe, and the data voltage value input to the data line S in the display panel 10 is changed, and the brightness of the display panel 10 changes; the optional optical probe can be an optical measurement probe such as the CA-410 precision measurement probe.

[0063] J222: When the optical probe detects that the brightness of the display panel 10 has reached the 255 grayscale brightness level under the first target brightness level, the data voltage value on the data line S at this time is read as the first theoretical data voltage value.

[0064] J223: Find the first theoretical grayscale value corresponding to the first theoretical data voltage value from the gamma curve. That is, the first theoretical gamma value corresponding to the 255 grayscale brightness of the display panel 10 at the first target brightness level can be found from the preset gamma curve. The found first theoretical gamma value includes the first theoretical data voltage value and the first theoretical grayscale value. Write the above first theoretical data voltage value and the first theoretical grayscale value into the display panel 10 and keep them unchanged. That is, write the first theoretical data voltage value onto the data line S in the display panel 10 so that the theoretical luminous brightness of the display panel 10 is 255 grayscale brightness at the first target brightness level.

[0065] Specifically, this can be understood as follows: For example, if the first target brightness level of the display panel 10 in this embodiment is the highest target brightness level, such as 800 nits, then after the display panel 10 is lit, the brightness is detected by an optical probe. By changing the data voltage value input to the data line S in the display panel 10, the brightness of the display panel 10 changes with the data voltage value. When the optical probe detects that the brightness of the display panel 10 has reached the highest target brightness level, such as 800 nits, it reads the data voltage value on the data line S at this time as the first theoretical data voltage value. Then, it finds the first theoretical grayscale value on the horizontal axis corresponding to the first theoretical data voltage value on the vertical axis from the gamma curve (that is, it obtains the first theoretical gamma value corresponding to the 255 grayscale brightness at the highest target brightness level, i.e., 800 nits). Then, it writes the first theoretical data voltage value and the corresponding first theoretical grayscale value into the display panel 10 and keeps them unchanged, in preparation for the subsequent debugging of the A value on the first power signal line 102 of the display panel 10 at the first target brightness level.

[0066] J23: Inputs a starting voltage value to the first power signal line 102. Optionally, this starting voltage value is the theoretical voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is operating in the non-saturation region. This starting voltage value can be larger than the first power signal value when the driving transistor 101 in the display panel 10 is operating in the saturation region. Based on this starting voltage value, with an amplitude of ΔV, the voltage value input to the first power signal line 102 is decreased by ΔV each time, and the brightness change of the display panel 10 is detected by a brightness detection device.

[0067] J24: The voltage value of the first power signal line 102 is decreased by ΔV each time. During the process of detecting the brightness change of the display panel 10 by the brightness detection device, when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 is recorded as A value. A value is the actual voltage value of the first power signal line 102 when the display panel 10 is in the first target brightness level and the driving transistor 101 is working in the saturation region.

[0068] J25: At this time, the A value obtained from the debugging is input to the first power signal line 102 in the display panel 10. The first actual data voltage value on the data line S in the display panel 10 is read. Then, the first actual grayscale value corresponding to the first actual data voltage value is found again from the gamma curve.

[0069] J26: Finally, the A value obtained during the above debugging process, as well as the first actual data voltage value and the first actual grayscale value corresponding to the A value, are burned into the driver chip 20.

[0070] The debugging method for the display device 000 provided in this embodiment can, based on the characteristics of each display panel 10 itself, such as the performance of the driving transistor 101 operating in the saturation working area, debug to obtain the required A value on the first power signal line 102 corresponding to the 255 grayscale brightness at the first target brightness level of the display panel 10, and the first actual gamma value corresponding to the A value. This is beneficial to ensure the overall display effect of the display device 000, while also effectively saving power consumption. Furthermore, by using an optical probe to detect the changes in the brightness of the display panel 10 in real time following the data voltage value, it is beneficial to accurately detect the brightness of the display panel 10 when it reaches the 255 grayscale at the first target brightness level, thereby improving debugging efficiency.

[0071] In some alternative embodiments, please refer to the references. Figure 1 and Figure 6 , Figure 6 This is another flowchart of the debugging method provided in this embodiment of the invention. In the debugging method provided in this embodiment, based on the initial voltage value, the voltage value input to the first power signal line 102 is adjusted in steps of ΔV, and the brightness change of the display panel 10 is detected; when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 at this time is recorded as value A, specifically including:

[0072] J241: The initial voltage value is X;

[0073] J242: When the voltage input to the first power signal line 102 is adjusted to Xm×ΔV, the brightness of the display panel 10 detected by the optical probe is the first brightness.

[0074] J243: When the voltage input to the first power signal line 102 is adjusted to X-(m+1)×ΔV, the brightness of the display panel 10 detected by the optical probe is the second brightness.

[0075] J244: If the normalized rate of change between the second brightness and the first brightness is less than 5%, then the value of A is Xm×ΔV; where m is a positive integer and ΔV is a positive number.

[0076] This embodiment explains the debugging method provided. In step J24, based on the initial voltage value, the voltage value of the input first power signal line 102 is decreased by ΔV each time. When the voltage value input to the first power signal line 102 is adjusted to Xm×ΔV, the brightness of the display panel 10 detected by the optical probe is the first brightness. When the voltage value input to the first power signal line 102 is adjusted to X-(m+1)×ΔV the next time, the brightness of the display panel 10 detected by the optical probe is the second brightness. The normalized rate of change between the second brightness and the first brightness is calculated to be less than 5%. Therefore, Xm×ΔV is the required value A, that is, the brightness change rate of the display panel 10 is less than 5%. When the value is 5%, the voltage value previously input to the first power signal line 102 is recorded as value A. For example, X is -2V, m is 9, and ΔV is 0.1V. When the voltage input to the first power signal line 102 is adjusted to (-2-10×0.1)V, the brightness of the display panel 10 detected by the optical probe is the first brightness. When the voltage input to the first power signal line 102 is adjusted to (-2-11×0.1)V, the brightness of the display panel 10 detected by the optical probe is the second brightness. Then, the value A is (-2-10×0.1)V, which is -3V. This is the required value A on the first power signal line 102 corresponding to the 255 grayscale brightness of the display panel 10 at the first target brightness level.

[0077] In some alternative embodiments, please refer to the references. Figure 1 and Figure 7 , Figure 7 This is another flowchart of the debugging method provided in this embodiment of the invention. In the debugging method provided in this embodiment, the first target brightness level also includes a non-maximum target brightness level, that is, the first target brightness level includes not only the maximum target brightness level but also a non-maximum target brightness level. Therefore, the debugging method of the display device 000 further includes:

[0078] J17: Repeat the above debugging process to test the other actual voltage value of the first power signal line 102 when the drive transistor 101 is working in the saturation region at a non-maximum target brightness level.

[0079] J18: Obtain the different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under different non-maximum target brightness levels, and burn them into the driver chip 20.

[0080] This embodiment explains that the first target brightness level can be understood not only as the highest target brightness level that the display panel 10 can display, but also as other non-highest target brightness levels that the display panel 10 can display. After completing the debugging of the A value and the corresponding first actual data voltage value and first actual grayscale value of the display panel 10 at the highest target brightness level (e.g., 800 nits), the above debugging process can be repeated to test the display panel 10 at non-highest target brightness levels (e.g., 600 nits, 380 nits, 150 nits, 75 nits, 30 nits, 16 nits, 6.5 nits, 2 nits, etc.) when the driving transistor 101 is working in the saturation region, and another actual voltage value of the first power signal line 102. Finally, the different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 at different non-highest target brightness levels are obtained and burned into the driver chip 20 together with the A value and the corresponding first actual data voltage value and first actual grayscale value.

[0081] The debugging method for the display device 000 provided in this embodiment can, based on the characteristics of each display panel 10 itself, such as the performance of the driving transistor 101 operating in the saturation region, debug to obtain the required A value on the first power signal line 102 corresponding to the 255 grayscale brightness at the first target brightness level and the first actual gamma value corresponding to the A value. It can also obtain another actual voltage value of the first power signal line 102 when the driving transistor 101 operates in the saturation region at the first target brightness level, including non-maximum target brightness levels. In other words, based on the characteristics of each display panel 10, the first power signal line 102 is debugged to obtain the required A value on the first power signal line 102 when the driving transistor 101 operates in the saturation region at different target brightness levels. The values ​​obtained from the above debugging are burned into the value driver chip 20 according to the different actual voltage values. This provides a more accurate debugging process for the drive signal values ​​subsequently burned into the driver chip 20. This allows the display device 000, which is subsequently bound to the driver chip 20, to display various 255 grayscale brightness levels under different first target brightness levels through the actual first power signal value and actual gamma value provided by the driver chip 20. This ensures the overall display effect of the display device 000, effectively saves power consumption, and also allows the actual voltage values ​​under different target brightness levels to be debugged one by one according to the characteristics of the drive transistor 101 in the display panel 10, improving the debugging accuracy and further enhancing the display quality.

[0082] In some alternative embodiments, please refer to the references. Figure 1 and Figure 8 , Figure 8This is another flowchart of the debugging method provided in this embodiment of the invention. In the debugging method provided in this embodiment, value A is the actual voltage value of the first power signal line 102 when the display panel 10 is in its highest target brightness level and the driving transistor 101 is working in the saturation region; the display panel 10 also includes multiple non-highest target brightness levels; the debugging method provided in this embodiment includes:

[0083] J21: Obtain the gamma curve corresponding to different grayscale values ​​of the display panel 10. The gamma curve is preset according to the characteristics of the display panel 10. Through the preset process, the data voltage value corresponding to different grayscale values ​​of the display panel 10 can be obtained. The data voltage is the data voltage value provided by the data line S in the display panel 10 to the sub-pixel 00. In the gamma curve graph, the horizontal axis generally represents the grayscale value and the vertical axis represents the data voltage value. Adjusting the grayscale value means adjusting the magnitude of the data voltage value. Different data voltage values ​​represent different brightness.

[0084] J22: When the display panel 10 is powered on, a first fixed voltage value is input to the first power signal line 102. It can be understood that this first fixed voltage value is not provided by the driver chip 20 to the first power signal line 102 in the display panel 10, but is directly provided to the first power signal line 102 in the display panel 10 through an external signal source. Optionally, at this time, other signal lines in the display panel 10, such as the second power signal line, are also input with positive power signals so that the display panel 10 can light up.

[0085] J23: Inputs a starting voltage value to the first power signal line 102. Optionally, this starting voltage value is the theoretical voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is operating in the non-saturation region. This starting voltage value can be larger than the first power signal value when the driving transistor 101 in the display panel 10 is operating in the saturation region. Based on this starting voltage value, with an amplitude of ΔV, the voltage value input to the first power signal line 102 is decreased by ΔV each time, and the brightness change of the display panel 10 is detected by a brightness detection device.

[0086] J24: The voltage value of the first power signal line 102 is decreased by ΔV each time. During the process of detecting the brightness change of the display panel 10 by the brightness detection device, when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 is recorded as A value. A value is the actual voltage value of the first power signal line 102 when the display panel 10 is in the first target brightness level and the driving transistor 101 is working in the saturation region.

[0087] J25: At this time, the A value obtained from the debugging is input to the first power signal line 102 in the display panel 10. The first actual data voltage value on the data line S in the display panel 10 is read. Then, the first actual grayscale value corresponding to the first actual data voltage value is found again from the gamma curve.

[0088] J26: Finally, the A value obtained during the above debugging process, as well as the first actual data voltage value and the first actual grayscale value corresponding to the A value, are burned into the driver chip 20.

[0089] J27: By calculation and table lookup, the different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under different non-maximum target brightness levels are obtained and burned into the driver chip 20.

[0090] This embodiment explains that the display device 000 can, based on the characteristics of each display panel 10 itself, such as the performance of the driving transistor 101 operating in the saturation region, adjust to obtain the required A value on the first power signal line 102 corresponding to the 255 grayscale brightness at the first target brightness level of the display panel 10, and the first actual gamma value corresponding to the A value. The first target brightness level is the highest target brightness level. The A value obtained by the above adjustment steps is the actual voltage value of the first power signal line 102 when the driving transistor 101 is operating in the saturation region at the highest target brightness level of the display panel 10. Then, by calculation and table lookup, the different voltage values ​​corresponding to the first power signal line 102 when the driving transistor 101 is operating in the saturation region at other non-highest target brightness levels of the display panel 10 can be obtained. The actual voltage value and different actual gamma values ​​are burned into the driver chip 20. The different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under other non-maximum target brightness levels can be obtained by calculation and table lookup without repeating the above steps. Thus, while ensuring display quality and saving display power consumption, it is only necessary to debug the corresponding A value under the maximum target brightness level and then obtain the different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 when the driver transistor 101 is working in the saturation region under other different non-maximum target brightness levels by table lookup and calculation. It is not necessary to debug each target brightness level of a display panel once, thus greatly improving debugging efficiency and production efficiency.

[0091] Optional, such as Figure 1 and Figure 9 As shown, Figure 9 This is another flowchart of the debugging method provided in this embodiment of the invention. In this embodiment, different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under different non-maximum target brightness levels are obtained by calculation or table lookup, including:

[0092] J271: Lookup table, when the display panel 10 is at the highest target brightness level and the driving transistor 101 is working in the saturation region, the lookup table value of the first power signal line 102 is a1;

[0093] J272: Lookup table, when the display panel 10 is not at the highest target brightness level and the driving transistor 101 is working in the saturation region, the lookup table value of the first power signal line 102 is b1;

[0094] J273: The actual voltage value P1 corresponding to the first power signal line 102 of the display panel 10 when it is not at the highest target brightness level is calculated, where |P1| / |A|=|b1| / |a1|.

[0095] This embodiment explains the specific process of obtaining the different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under different non-maximum target brightness levels through calculation or table lookup. A table of theoretical voltage values ​​corresponding to the first power signal line 102 under different target brightness levels for the display panel 10 in this embodiment is provided below, as shown in Table 1:

[0096] Table 1:

[0097]

[0098] With the display panel 10 refreshed at 120Hz, the theoretical voltage values ​​corresponding to the first power signal line 102 under different target brightness levels (800 nits, 600 nits, 380 nits, 150 nits, 75 nits, 75 nits, 30 nits, 16 nits, 6.5 nits, 2 nits). It can be understood that when the display panel 10 transitions from a high refresh rate to a low refresh rate, a transition process is required. Therefore, the division of the target brightness levels of the display panel 10 includes two 75-nit levels.

[0099] By referring to Table 1 above, we can find that when the display panel 10 is at its highest target brightness level and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is a1. For example, in Table 1, when the display panel 10 is at its highest target brightness level, i.e., 800 nits, and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is -4V.

[0100] By referring to Table 1 above, we can obtain the table lookup value of the first power signal line 102 when the display panel 10 is not at the highest target brightness level and the driving transistor 101 is operating in the saturation region, which is b1. For example, in the example in Table 1, when the display panel 10 is at the 600 nit level and the driving transistor 101 is operating in the saturation region, the table lookup value of the first power signal line 102 is -2.7V. However, when the display panel 10 is at the highest target brightness level, such as the 800 nit level, and the driving transistor 101 is operating in the saturation region, the actual value of the first power signal line 102 is A. Therefore, we can calculate the actual voltage value P1 corresponding to the first power signal line 102 when the display panel 10 is not at the highest target brightness level (such as the 600 nit level), which is |P1| / |A. Let |b1| / |a1| be the value of P1. Assuming that the value of A is adjusted to be -3V, a1 is equal to -4V from the table, and b1 is equal to -2.7V from the table, then |b1| / |a1| = 0.675, and |P1| = 0.675 × 3 = 2.025V. Taking the negative integer (since the negative power supply signal value is negative), we get the value of P1 as -2V. Then, the value of P1 calculated by looking up the table for the display panel 10 at a non-maximum target brightness level (such as the display panel 10 at the 600 nits level) is burned into the driver chip 20. When the display device actually displays the brightness of the non-maximum target brightness level, it can save the power consumption of 0.7V multiplied by the driving current corresponding to the non-maximum target brightness level. This not only speeds up the debugging process and improves production efficiency, but also meets the requirement of reducing the power consumption of the display device.

[0101] It is understood that the different theoretical voltage values ​​of the first power signal line 102 corresponding to different target brightness levels of the display panel 10 in Table 1 above are only examples. In specific implementation, the values ​​in Table 1 are obtained according to different display panels 10. This embodiment is only an example to illustrate one possible setting. In specific implementation, it includes but is not limited to this Table 1.

[0102] Optionally, by referring to Table 1 above, the lookup value of the first power signal line 102 when the driving transistor 101 is operating in the saturation region at a non-maximum target brightness level is obtained, is b1. Alternatively, as shown in the example in Table 1, when the display panel 10 is at the 380 nit level and the driving transistor 101 is operating in the saturation region, the lookup value of the first power signal line 102 is -1.5V. At the maximum target brightness level, such as 800 nits, when the driving transistor 101 is operating in the saturation region, the actual value of the first power signal line 102 is A. Therefore, the actual value of the first power signal line 102 at this non-maximum target brightness level (e.g., at 380 nits) can be calculated. The voltage value is P1. |P1| / |A| = |b1| / |a1|. Assuming that the value of A is adjusted to be equal to -3V, a1 is equal to -4V from the table, and b1 is equal to -1.5V from the table, then |b1| / |a1| = 0.375, |P1| = 0.375 × 3 = 1.125V. Taking the negative integer (since the negative power supply signal value is negative), the value of P1 is -1V. Therefore, when the driving transistor 101 of the display panel 10 is working in the saturation region at the non-maximum target brightness level (such as the display panel 10 at the 380 nit level), the actual value of the first power supply signal line 102 is -1V. When the display device actually displays the brightness of the non-maximum target brightness level, it can save the power consumption of 0.5V multiplied by the driving current corresponding to the non-maximum target brightness level.

[0103] It should be noted that, in this embodiment, the table lookup calculation process for the actual value of the first power signal line 102 when the driving transistor 101 is working in the saturation region under other non-maximum target brightness levels will not be described in detail. For specific details, please refer to the above examples for understanding.

[0104] In some alternative embodiments, please refer to the references. Figure 1 and Figure 10 , Figure 10 This is another flowchart of the debugging method provided in this embodiment of the invention. The debugging method for the display device provided in this embodiment further includes:

[0105] J28: Input the P1 value to the first power signal line 102 in the display panel 10, read the second actual data voltage value on the data line S in the display panel 10 at this time, and find the second actual grayscale value corresponding to the second actual data voltage value from the gamma curve again.

[0106] J29: Burn the P1 value and the corresponding second actual data voltage value and second actual grayscale value into the driver chip 20.

[0107] This embodiment explains the debugging method of the display device 000. After obtaining the different actual voltage values ​​P1 corresponding to the first power signal line 102 under different non-maximum target brightness levels through calculation or table lookup, the P1 value can be input to the first power signal line 102 in the display panel 10. The second actual data voltage value on the data line S in the display panel 10 is read at this time. Then, the second actual grayscale value corresponding to the second actual data voltage value is found again from the gamma curve. The second actual data voltage value and the second actual grayscale value are the display panel 10 at non-maximum target brightness levels. At the current position, the actual voltage value P1 of the first power signal line 102 corresponds to the actual gamma value; after obtaining the actual voltage value and actual gamma value under different non-maximum target brightness levels, each P1 value and the corresponding second actual data voltage value and second actual grayscale value are burned into the driver chip 20 to complete the burning of the driver chip 20. Then, after the driver chip 20 is bound to the display panel 10 after the burning is completed, the display device 000 can display according to different actual voltage values ​​and actual gamma values, which helps to reduce the overall display power consumption of the display device 000.

[0108] In some alternative embodiments, please refer to the references. Figure 1 and Figure 11 , Figure 11 This is another flowchart of the debugging method provided in this embodiment of the invention. In the debugging method provided in this embodiment, value A is the actual voltage value of the first power signal line 102 when the display panel 10 is in its highest target brightness level and the driving transistor 101 is working in the saturation region. The display panel 10 also includes multiple non-highest target brightness levels, wherein the multiple non-highest target brightness levels include at least a second target brightness level and a third target brightness level. The debugging method provided in this embodiment includes:

[0109] J31: Obtain the gamma curve corresponding to different grayscale values ​​of the display panel 10. The gamma curve is preset according to the characteristics of the display panel 10. Through the preset process, the data voltage value corresponding to different grayscale values ​​of the display panel 10 can be obtained. The data voltage is the data voltage value provided by the data line S in the display panel 10 to the sub-pixel 00. In the gamma curve graph, the horizontal axis generally represents the grayscale value and the vertical axis represents the data voltage value. Different data voltage values ​​represent different brightness.

[0110] J32: When the display panel 10 is powered on, a first fixed voltage value is input to the first power signal line 102, and the display panel 10 lights up. Then, in the gamma curve, the first theoretical gamma value corresponding to the 255 grayscale brightness of the display panel 10 at the first target brightness level is found, and the first theoretical gamma value is written into the display panel 10. The first target brightness level can be understood as the display panel 10 having multiple brightness levels. For example, the brightness levels that the display panel 10 can display can be divided into multiple brightness levels (from high brightness to low brightness) such as 800 nits, 600 nits, 380 nits, 150 nits, 75 nits, 30 nits, 16 nits, 6.5 nits, 2 nits, etc. The first target brightness level is the highest target brightness level of the display panel 10. In this embodiment, the first target brightness level is the highest target brightness level of 800 nits among the brightness levels that the display panel 10 can display, as an example for illustration. The display panel 10 can output a grayscale range of 256 levels, which is the grayscale range of 0-255 for the display panel 10. Therefore, the 255 grayscale brightness of the display panel 10 at the first target brightness level can be understood as the highest grayscale brightness of the display panel 10 at the highest target brightness level. The first theoretical gamma value corresponding to the 255 grayscale brightness of the display panel 10 at the highest target brightness level can be found from a preset gamma curve. The found first theoretical gamma value includes a first theoretical data voltage value and a first theoretical grayscale value. The first theoretical data voltage value is written to the data line S in the display panel 10 so that the theoretical luminous brightness of the display panel 10 is the 255 grayscale brightness at the first target brightness level.

[0111] J33: Inputs a starting voltage value to the first power signal line 102. Then, based on the starting voltage value, with an amplitude of ΔV (ΔV can be understood as a decreasing value), the voltage value of the first power signal line 102 is decreased by ΔV each time. The brightness change of the display panel 10 is detected by a brightness detection device. Optionally, this embodiment does not specifically limit the brightness detection device, as long as it can detect the brightness change of the display panel 10 under different voltage values ​​of the first power signal line 102. The value of ΔV can be less than or equal to 0.1V, and optionally ΔV is equal to 0.1V.

[0112] J34: The voltage value of the first power signal line 102 is decreased by ΔV each time. During the process of detecting the brightness change of the display panel 10 by the brightness detection device, when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 is recorded as value A. Value A is the actual voltage value of the first power signal line 102 when the display panel 10 is in the highest target brightness level and the driving transistor 101 is working in the saturation region. That is, it can be understood that the actual voltage value required by the first power signal line 102 when the display panel 10 is in the highest target brightness level and the driving transistor 101 is working in the saturation region is obtained by the debugging method provided in this embodiment.

[0113] J35: At this time, the A value obtained from the debugging is input to the first power signal line 102 in the display panel 10. The first actual data voltage value on the data line S in the display panel 10 is read. Then, the first actual grayscale value (the horizontal axis value of the gamma curve) corresponding to the first actual data voltage value (the vertical axis value of the gamma curve) is found again from the gamma curve. The obtained first actual data voltage value and first actual grayscale value can be understood as the first actual gamma value, that is, the first actual gamma value is the gamma value corresponding to 255 grayscale brightness of the display panel 10 at the highest target brightness level. Thus, the first actual gamma value (including the first actual data voltage value and the first actual grayscale value) required by the display panel 10 when the driving transistor 101 is working in the saturation region at the highest target brightness level can be obtained.

[0114] J36: Finally, the A value obtained during the above debugging process, as well as the first actual data voltage value and the first actual grayscale value corresponding to the A value, are burned into the driver chip 20.

[0115] J37: Repeat the above debugging steps, specifically by repeating steps J32-J34, powering on the display panel 10 and inputting a second fixed voltage value to the first power signal line 102, thus lighting up the display panel 10; in the gamma curve, find the second theoretical gamma value corresponding to the 255 grayscale brightness of the display panel 10 at the second target brightness level, and write the second theoretical gamma value into the display panel 10; input a second starting voltage value to the first power signal line 102, and based on the second starting voltage value, decrease the voltage value input to the first power signal line 102 by ΔV, detecting the brightness change of the display panel 10; wherein, the second starting voltage value is the theoretical voltage value corresponding to the first power signal line 102 when the driving transistor 101 in the display panel 10 is working in the non-saturation region; when the brightness change rate of the display panel 10 is less than 5%, the voltage value input to the first power signal line 102 at this time is recorded as the B value, and the brightness of the display panel 10 at the second target brightness level is obtained. At the target brightness level, when the driving transistor 101 is operating in the saturation region, the actual voltage value of the first power signal line 102 is value B. The second target brightness level can be understood as one of the multiple non-maximum target brightness levels among the brightness levels that the display panel 10 can display. Optionally, the second target brightness level can be selected as a brightness level where the voltage value of the first power signal line 102 theoretically does not change. As shown in Table 1 above, the theoretical voltage value of the first power signal line 102 of the display panel 10 at brightness levels starting from 150 nits and below basically does not change. Therefore, if the first target brightness level is the highest brightness level of 800 nits, the second target brightness level can be a non-maximum target brightness level of 150 nits. Repeating the above steps J31-J34 can obtain the value B, which can be understood as the actual voltage value of the first power signal line 102 when the driving transistor 101 is operating in the saturation region at the second target brightness level of the display panel 10. It is understood that this embodiment is only a simplified description of the above steps for debugging to obtain the repeated B value. For specific implementation, please refer to the detailed description in the above embodiment for understanding.

[0116] J38: At this time, the B value obtained from the debugging is input to the first power signal line 102 in the display panel 10. The third actual data voltage value on the data line S in the display panel 10 is read. Then, the third actual grayscale value (the horizontal axis value of the gamma curve) corresponding to the third actual data voltage value (the vertical axis value of the gamma curve) is found again from the gamma curve. The obtained third actual data voltage value and third actual grayscale value can be understood as the third actual gamma value, that is, the third actual gamma value is the gamma value corresponding to 255 grayscale brightness of the display panel 10 at the second target brightness level. Thus, the third actual gamma value (including the third actual data voltage value and the third actual grayscale value) required by the display panel 10 when the driving transistor 101 is working in the saturation region at the second target brightness level can be obtained.

[0117] J39: By calculation and table lookup, the actual voltage value and actual gamma value corresponding to the first power signal line 102 under the third target brightness level are obtained, and then combined with the B value, the third actual data voltage value, and the third actual grayscale value, and burned into the driver chip 20. Optionally, the third target brightness level can be understood as one of the multiple non-highest target brightness levels among the brightness levels that the display panel 10 can display, excluding the second target brightness level. If the second target brightness level is selected as a brightness level where the voltage value of the first power signal line 102 theoretically does not change, as shown in Table 1 above, the theoretical voltage value of the first power signal line 102 of the display panel 10 at brightness levels starting from 150 nits and below basically does not change, then if the first target brightness level is the highest brightness level of 800 nits, the second target brightness level can be a non-highest target brightness level of 150 nits, and the third target brightness level can be any non-highest target brightness level between 150 nits and 800 nits.

[0118] This embodiment explains the debugging method for the display device. Based on the characteristics of each display panel 10, such as the performance of the driving transistor 101 operating in the saturation region, it is possible to not only debug the display panel 10 at the first target brightness level (255 grayscale brightness) corresponding to the first power signal line 102 and the first actual gamma value corresponding to A, but also to debug the display panel 10 at the second target brightness level (255 grayscale brightness) corresponding to the first power signal line 102 and the third actual gamma value corresponding to B. This provides an accurate debugging process for the driving signal values ​​subsequently programmed into the driver chip 20. This allows the display device 000, which is subsequently bound to the driver chip 20, to display 255 grayscale brightness at the first target brightness level using the actual first power signal value (A value) and the first actual gamma value provided by the driver chip 20 during the display process. It can also display 255 grayscale brightness at the second target brightness level using the actual first power signal value (B value) and the third actual gamma value provided by the driver chip 20. This helps ensure the overall display effect of the display device 000, effectively saves power consumption, and allows the use of the above two actual values ​​to look up tables and calculate the actual values ​​of the first power signal at other non-maximum target brightness levels, which helps improve calculation accuracy. Furthermore, by calculating and looking up tables, the actual values ​​of the first power signal for the non-maximum target brightness levels of the display panel 10, excluding the second target brightness level, can be obtained. The different actual voltage values ​​and different actual gamma values ​​corresponding to the first power signal line 102 under other non-maximum target brightness levels can be obtained without repeating the above steps one by one. They can be obtained by finding patterns, calculating, and looking up tables. It is not necessary to measure each target brightness level of a display panel 10 once. It is only necessary to measure the actual voltage values ​​of the first power signal under two corresponding target brightness levels. Thus, while ensuring further improvement in debugging accuracy, production efficiency can be improved.

[0119] Optional, such as Figure 1 and Figure 12 As shown, Figure 12 This is another flowchart of the debugging method provided in this embodiment of the invention. In this embodiment, the actual voltage value and actual gamma value corresponding to the first power signal line 102 under the third target brightness level are obtained by calculation and table lookup, including:

[0120] J391: Lookup table, when the display panel 10 is at the highest target brightness level and the driving transistor 101 is working in the saturation region, the lookup table value of the first power signal line 102 is a2;

[0121] J392: Lookup table, when the drive transistor 101 is working in the saturation region at the second target brightness level, the lookup table value of the first power signal line 102 is b2;

[0122] J393: Lookup table, when the display panel 10 is in the third target brightness level and the driving transistor 101 is working in the saturation region, the lookup table value of the first power signal line 102 is c2.

[0123] J394: The actual voltage value corresponding to the first power signal line 102 of the display panel 10 at the third target brightness level is calculated to be the value of P2, where (|c2|-|b2|) / (|a2|-|b2|)=(|P2|-|B|) / (|A|-|B|).

[0124] This embodiment explains the specific process of obtaining the actual voltage value and actual gamma value of the first power signal line 102 under the third target brightness level (not the highest target brightness level) through calculation or table lookup. It can be provided that the theoretical voltage values ​​of the first power signal line 102 under different target brightness levels of the display panel 10 in this embodiment are provided as shown in Table 1 above. Table 1 will not be described again in this embodiment.

[0125] With the display panel 10 refreshed at 120Hz, the theoretical voltage values ​​corresponding to the first power signal line 102 under different target brightness levels (800 nits, 600 nits, 380 nits, 150 nits, 75 nits, 75 nits, 30 nits, 16 nits, 6.5 nits, 2 nits). It can be understood that when the display panel 10 transitions from a high refresh rate to a low refresh rate, a transition process is required. Therefore, the division of the target brightness levels of the display panel 10 includes two 75-nit levels.

[0126] By referring to Table 1 above, we can find that when the display panel 10 is in the highest target brightness level (i.e., the first target brightness level) and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is a2. For example, when the display panel 10 is in the highest target brightness level (i.e., the 800 nits level) and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is -4V, that is, a2 is -4V.

[0127] By referring to Table 1 above, we can find that when the display panel 10 is in the second target brightness level and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is b2. For example, in the example of Table 1, when the display panel 10 is in the 150 nit level and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is -1.4V, that is, b2 is -1.4V.

[0128] By referring to Table 1 above, we can find that when the display panel 10 is in the third target brightness level and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is c2. For example, when the display panel 10 is in the 600 nits level and the driving transistor 101 is working in the saturation region, the lookup value of the first power signal line 102 is -2.7V, that is, c2 is -2.7V.

[0129] When the display panel 10 is at its highest target brightness level (i.e., the first target brightness level), such as at 800 nits, and the driving transistor 101 is operating in the saturation region, the actual value of the first power signal line 102 is value A. When the display panel 10 is at its second target brightness level, such as at 150 nits, and the driving transistor 101 is operating in the saturation region, the actual value of the first power signal line 102 is value B. Calculations show that when the display panel 10 is at the third target brightness level (e.g., at 600 nits), the actual voltage value corresponding to the first power signal line 102 is P2: (|c2|-|b2|) / (|a2|-|b2|)=(|P2|-|B|) / (|A|-|B|). Assuming A is adjusted to equal -3V, B is adjusted to equal -1V, a2 is found to be equal to -4V (look up from the table), and b2 is found to be equal to... We get -1.4V, and c2 is -2.7V according to the table. Therefore, (|c2|-|b2|) / (|a2|-|b2|) = (2.7-1.4) / (4-1.4) = 0.5. Then (|P2|-|B|) / (|A|-|B|) = (|P2|-1) / (3-1) = 0.5. We can calculate that |P2| equals 2V. Taking the negative integer (since the negative power supply signal value is negative), we get the value of P2. If the voltage is -2V, the P2 value calculated by looking up the table for the third target brightness level (e.g., the display panel 10 at 600 nits) will be burned into the driver chip 20. When the display device actually displays the brightness of the third target brightness level, it can save the power consumption of 0.7V multiplied by the driving current corresponding to the third target brightness level. This not only speeds up the debugging process and improves production efficiency, but also meets the requirement of reducing the power consumption of the display device.

[0130] It is understood that the different theoretical voltage values ​​of the first power signal line 102 corresponding to different target brightness levels of the display panel 10 in Table 1 above are only examples. In specific implementation, the values ​​in Table 1 are obtained according to different display panels 10. This embodiment is only an example to illustrate one possible setting. In specific implementation, it includes but is not limited to this Table 1.

[0131] It should be noted that, in this embodiment, the table lookup calculation process for the actual value of the first power signal line 102 when the driving transistor 101 is working in the saturation region under other non-maximum target brightness levels will not be described in detail. For specific details, please refer to the above examples for understanding.

[0132] In some alternative embodiments, please refer to the references. Figure 1 and Figure 13 , Figure 13 This is another flowchart of the debugging method provided in this embodiment of the invention. The debugging method for the display device 000 in this embodiment further includes a verification step; the verification step includes:

[0133] J19: Electrically connect the programmed driver chip 20 to the display panel 10;

[0134] J191: Power on the display panel 10 again, input the first actual data voltage value and the first actual grayscale value, and check whether the brightness of the display panel 10 is 255 grayscale brightness under the first target brightness level through the optical probe.

[0135] J192: Read from the driver chip 20 whether the voltage value transmitted to the first power signal line 102 at this time is value A.

[0136] This embodiment explains that the debugging method for the display device also includes a verification step. Specifically, after programming the obtained A value and its corresponding first actual data voltage value and first actual grayscale value into the driver chip 20, and optionally, further programming the actual value of the first power signal and its corresponding actual gamma value at other target brightness levels into the driver chip 20, the programmed driver chip 20 is bound to the binding area BA of the display panel 10, establishing an electrical connection between the driver chip 20 and the display panel 10. The display panel 10 is then powered on again, and the first actual data voltage value and first actual grayscale value are supplied to the display panel 10 through the driver chip 20. The display panel is then examined using an optical probe. To determine if the brightness of display panel 10 is 255 grayscale values ​​at the first target brightness level, the voltage value transmitted to the first power signal line 102 from the driver chip 20 can be read to see if it is value A. Alternatively, the process may involve the driver chip 20 inputting a third actual data voltage value and a third actual grayscale value to display panel 10, and then using an optical probe to check if the brightness of display panel 10 is 255 grayscale values ​​at the second target brightness level. In this case, the voltage value transmitted to the first power signal line 102 from the driver chip 20 can be read to see if it is value B. If the result of the check is not the 255 grayscale brightness and value A at the first target brightness level, it indicates a programming error and requires rework. This embodiment also includes a verification step in the debugging method to verify whether the programming of the signal values ​​in the driver chip 20 is correct, which helps to improve accuracy.

[0137] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 14 , Figure 14 This is a flowchart illustrating a method for manufacturing a display device according to an embodiment of the present invention. The method for manufacturing the display device 000 provided in this embodiment includes:

[0138] Complete the debugging method in any of the above embodiments;

[0139] J190: The programmed driver chip 20 is electrically connected to the display panel 10 to form a display device 000.

[0140] The manufacturing method of the display device 000 provided in this embodiment requires completing the debugging method described in any of the above embodiments before binding the driver chip 20 to the display panel 10. This ensures that the drive signal burned into the driver chip 20 is debugged and burned according to the performance of the display panel 10 itself. After the debugged drive signal value is burned into the driver chip 20, other testing processes may also be completed. Finally, after the debugging and testing processes are completed and the yield rate is met, the burned driver chip 20 can be bound and electrically connected to the display panel 10 to form the display device 000 of this embodiment. It is understood that the display device 000 formed by the manufacturing method of this embodiment has the beneficial effects of the debugging method provided in the above embodiments. For details, please refer to the specific descriptions of the debugging methods for the display device in the above embodiments, which will not be repeated here.

[0141] In some alternative embodiments, please continue to refer to the references. Figures 1-4 and Figure 14 This embodiment provides a display device 000, which includes a display device manufactured according to the above-described manufacturing method. It is understood that the display device 000 of this embodiment, manufactured using the above-described manufacturing method, can be other display devices with display functions, such as computers, televisions, and vehicle-mounted display devices; the present invention does not impose specific limitations on this. The display device 000 provided in this embodiment of the present invention, because it employs the debugging method of the above embodiments during the manufacturing process, has the beneficial effects of the debugging method provided in the above embodiments. For details, please refer to the specific descriptions of the debugging methods for the display device in the above embodiments; these will not be repeated here.

[0142] As can be seen from the above embodiments, the debugging method and manufacturing method of the display device and the display device provided by the present invention achieve at least the following beneficial effects:

[0143] This invention provides a debugging method for a display device. The display device using this debugging method includes a display panel and a driver chip. After the debugging method is completed, the driver chip can be bonded to the display panel, making the driver chip electrically connected to the display panel to form a display device. The display panel may include multiple driving transistors and multiple first power signal lines. The driving transistors, as part of the pixel circuit, need to be electrically connected to the first power signal lines in the display panel. The first power signal lines can be understood as negative power signal lines, used to provide a negative power signal for the pixel circuit of each sub-pixel. Through the debugging method provided by this invention, after the driver chip with the burned signal value is bonded to the bonding area of ​​the display panel, when the display panel needs to display a first target brightness level of 255 grayscale, the voltage value provided by the driver chip to the first power signal lines in the display panel is value A, and the data voltage signal provided to the data lines is the first actual data voltage value. That is, the driver chip can provide the required actual first power signal to the driving transistors in the display panel in the saturation operating area, rather than the theoretical voltage value that may originally be smaller than value A. The debugging method for the display device provided by this invention can, based on the characteristics of each display panel itself, such as the performance of the driving transistor operating in the saturation working area, debug to obtain the required A value on the first power signal line corresponding to the 255 grayscale brightness at the first target brightness level of the display panel and the first actual gamma value corresponding to the A value. This provides a more accurate debugging process for the driving signal value subsequently burned into the driving chip, so that the display device subsequently bound to the driving chip can display the 255 grayscale brightness at the first target brightness level through the actual first power signal value, i.e., the A value and the first actual gamma value provided by the driving chip during the display process. This helps to ensure the overall display effect of the display device while effectively saving power consumption.

[0144] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A method of debugging a display device, characterized by, The display device comprises a display panel and a driving chip, the display panel comprises at least a plurality of driving transistors and a plurality of first power signal lines, the first power signal lines are used for providing a negative power signal for a pixel circuit of each sub-pixel; the debugging method comprises: obtaining a gamma curve corresponding to the display panel under different gray scale values; the display panel is powered on, a first fixed voltage value is input to the first power signal line, and the display panel is lit; in the gamma curve, a first theoretical gamma value corresponding to 255 gray scale brightness of the display panel under a first target brightness level is found, and the first theoretical gamma value is written into the display panel; a starting voltage value is input to the first power signal line, and the voltage value input to the first power signal line is decreased by ΔV on the basis of the starting voltage value, and the brightness change of the display panel is detected; wherein the starting voltage value is a theoretical voltage value corresponding to the first power signal line when the driving transistor in the display panel works in a non-saturation region; when the brightness change rate of the display panel is less than 5%, the voltage value input to the first power signal line at this time is recorded as A value, and the A value is the actual voltage value of the first power signal line when the driving transistor in the display panel works in a saturation region under the first target brightness level; the A value is input to the first power signal line in the display panel, the first actual data voltage value on the data line in the display panel at this time is read, and the first actual gray scale value corresponding to the first actual data voltage value is found again from the gamma curve; the A value, the first actual data voltage value corresponding to the A value, and the first actual gray scale value are burned into the driving chip.

2. The commissioning method of claim 1, wherein, The first actual data voltage value and the first actual gray scale value are a first actual gamma value, and the first actual gamma value is a gamma value corresponding to 255 gray scale brightness of the display panel under the first target brightness level.

3. The debugging method of claim 1, wherein: the first theoretical gamma value comprises a first theoretical data voltage value and a first theoretical gray scale value; in the debugging method, writing the first theoretical gamma value into the display panel comprises writing the first theoretical data voltage value into a data line in the display panel.

4. The debugging method of claim 3, wherein: the display panel is powered on, a first fixed voltage value is input to the first power signal line, and the display panel is lit; in the gamma curve, a first theoretical gamma value corresponding to 255 gray scale brightness of the display panel under a first target brightness level is found, and the first theoretical gamma value is written into the display panel, comprising: the brightness of the display panel is detected by an optical probe, the data voltage value input to the data line in the display panel is changed, and the brightness of the display panel changes; When the optical probe detects that the brightness of the display panel reaches 255 gray scale brightness under the first target brightness level, the data voltage value on the data line at this time is the first theoretical data voltage value; The first theoretical gray scale value corresponding to the first theoretical data voltage value is found from the gamma curve, and the first theoretical data voltage value and the first theoretical gray scale value are written into the display panel and remain unchanged.

5. The debugging method of claim 1, wherein, ΔV≤0.1V.

6. The commissioning method of claim 5, wherein, ΔV=0.1V.

7. The debugging method of claim 1, wherein, The voltage value input to the first power signal line is adjusted by ΔV steps based on the starting voltage value, and the brightness change of the display panel is detected; when the brightness change rate of the display panel is less than 5%, the voltage value input to the first power signal line at this time is recorded as A value, comprising: The starting voltage value is X; When the voltage value input to the first power signal line is X-m*ΔV, the optical probe detects that the brightness of the display panel is the first brightness; When the voltage value input to the first power signal line is X-(m+1)*ΔV, the optical probe detects that the brightness of the display panel is the second brightness; If the normalized change rate between the second brightness and the first brightness is less than 5%, the A value is X-m*ΔV; wherein m is a positive integer and ΔV is a positive number.

8. The commissioning method of claim 1, wherein, The first target brightness level includes the highest target brightness level of the display panel.

9. The commissioning method of claim 1, wherein, The first target brightness level also includes a non-highest target brightness level. The debugging method further comprises: The debugging method of claim 1 is repeated to test another actual voltage value of the first power signal line when the driving transistor works in the saturation region under the non-highest target brightness level of the display panel; Different actual voltage values and different actual gamma values corresponding to the first power signal line under different non-highest target brightness levels are obtained and burned into the driving chip.

10. The commissioning method of claim 1, wherein, The A value is the actual voltage value of the first power signal line when the driving transistor works in the saturation region under the highest target brightness level of the display panel; The display panel further comprises a plurality of non-highest target brightness levels; The debugging method further comprises: Different actual voltage values and different actual gamma values corresponding to the first power signal line under different non-highest target brightness levels are obtained by calculation and table lookup and burned into the driving chip.

11. The commissioning method of claim 10, wherein, Different actual voltage values and different actual gamma values corresponding to the first power signal line under different non-highest target brightness levels are obtained by calculation or table lookup, comprising: The table lookup value of the first power signal line when the driving transistor works in the saturation region under the highest target brightness level of the display panel is a1 by table lookup; The table lookup value of the first power signal line when the driving transistor works in the saturation region under the non-highest target brightness level of the display panel is b1 by table lookup; The actual voltage value corresponding to the first power signal line of the display panel at the non-highest target brightness level is calculated to be P1, and |P1| / |A|=|b1| / |a1|.

12. The commissioning method of claim 11, wherein, Further comprising: The P1 value is input to the first power signal line in the display panel, the second actual data voltage value on the data line of the display panel at this time is read, and the second actual gray scale value corresponding to the second actual data voltage value is found again from the gamma curve; The P1 value, the second actual data voltage value corresponding to the P1 value, and the second actual gray scale value are programmed into the driving chip.

13. The commissioning method of claim 1, wherein, The A value is the actual voltage value of the first power signal line when the driving transistor works in the saturation region of the display panel at the highest target brightness level; The display panel further comprises a plurality of non-highest target brightness levels; The plurality of non-highest target brightness levels comprise a second target brightness level and a third target brightness level; The debugging method further comprises: The debugging method of claim 1 is repeated to test the actual voltage value of the first power signal line when the driving transistor works in the saturation region of the display panel at the second target brightness level, which is B value; The B value is input to the first power signal line in the display panel, the third actual data voltage value on the data line of the display panel at this time is read, and the third actual gray scale value corresponding to the third actual data voltage value is found again from the gamma curve; Through calculation and table lookup, the actual voltage value and the actual gamma value corresponding to the first power signal line at the third target brightness level are obtained, and the B value, the third actual data voltage value, and the third actual gray scale value are programmed into the driving chip.

14. The debugging method of claim 13, wherein Through calculation and table lookup, the actual voltage value and the actual gamma value corresponding to the first power signal line at the third target brightness level are obtained, and the B value, the third actual data voltage value, and the third actual gray scale value are programmed into the driving chip. The table lookup value of the first power signal line when the driving transistor works in the saturation region of the display panel at the highest target brightness level is a2; The table lookup value of the first power signal line when the driving transistor works in the saturation region of the display panel at the second target brightness level is b2; The table lookup value of the first power signal line when the driving transistor works in the saturation region of the display panel at the third target brightness level is c2; The actual voltage value corresponding to the first power signal line of the display panel at the third target brightness level is calculated to be P2, and (|c2|-|b2|) / (|a2|-|b2|)=(|P2|-|B|) / (|A|-|B|).

15. The commissioning method of claim 1, wherein, The debugging method further comprises a verification step; The verification step comprises: The programmed driving chip is electrically connected with the display panel; The display panel is re-powered, and the first actual data voltage value and the first actual gray scale value are input, and whether the brightness of the display panel is 255 gray scale brightness under the first target brightness level is checked through an optical probe. Whether the voltage value transmitted to the first power signal line at this time is A value is read from the driving chip.

16. The commissioning method of claim 1, wherein, The starting voltage value is greater than the A value.

17. The commissioning method of claim 1, wherein, The first power signal line is a negative power signal line.

18. The commissioning method of claim 17, wherein, The A value is a negative value.

19. A method for manufacturing a display device, comprising: The manufacturing method comprises: The debugging method of any one of claims 1-18 is completed; The driving chip after burning is electrically connected with the display panel to form the display device.

20. A display device comprising: The display device comprises a display device manufactured according to the manufacturing method of claim 19.

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