TWI852725B - Gamma voltage debugging method and display debugging system - Google Patents

Abstract

The present invention mainly discloses a gamma voltage debugging method, which is executed by a control unit to perform a gamma voltage debugging on a display. In particular, the method of the present invention first establishes a three-dimensional space, and confirms whether the error value of the color coordinates and brightness of the center point of the three-dimensional space and the color coordinates and brightness of a target point is lower than a predetermined value. If not, a secondary three-dimensional space is found based on the center point, the target point and the end points of the three-dimensional space, and confirms whether the error value of the color coordinates and brightness of the center point of the secondary three-dimensional space and the color coordinates and brightness of the target point is lower than a predetermined value. If so, a central gamma voltage group corresponding to the center point is used as the target gamma voltage group. If not, the search and establishment of the secondary three-dimensional space is iteratively executed, and it is confirmed whether the error value between the color coordinate and brightness of the center point of the secondary three-dimensional space and the color coordinate and brightness of the target point is lower than a predetermined value.

Description

Gamma voltage debugging method and display debugging system

The present invention relates to the technical field of display devices, and more particularly to a gamma voltage debugging method for a display debugging system.

FIG1 is a block diagram of a known display. As shown in FIG1 , the display 1a mainly includes: a display panel 11a including M×N pixels and at least one display driver chip 12a, where M and N are positive integers. During normal operation, the display driver chip 12a receives display data from a host computer 2a (such as an application processor of a smart phone), and then drives the display panel 11a according to the display data. Electronic engineers familiar with the design and manufacture of the display driver chip 12a should know that the display driver chip 12a has a gamma voltage generating unit 121a, and the gamma voltage generating unit 121a is used to generate M×N groups of gamma voltages corresponding to the M×N pixels, so that a source driving circuit inside the display driver chip 12a drives the display panel 11a according to the M×N groups of gamma voltages.

When the display panel 11a is driven to display an image, the user can change the display mode of the display 1a to a normal mode, a low color temperature mode, a game mode, or a movie mode. At this time, the display driver chip 12a changes the value of the register to adjust a set of center gamma voltages ( , , ), so that the gamma voltage generating unit 121a adjusts each set of gamma voltages correspondingly according to the central gamma voltage set.

However, after completing the transformation of the center gamma voltage and the adjustment of each set of gamma voltages, the display driver chip 12a cannot determine whether the color coordinates and brightness of the image displayed by the display panel 11a meet the target color coordinates and target brightness. Therefore, before the display 1a is shipped, the manufacturer usually stores multiple sets of target gamma voltages corresponding to multiple display modes in the display driver chip 12a. Unfortunately, due to the nonlinear correlation between the gamma voltage of the display panel 11a and the corresponding display brightness, coupled with the multidimensionality of the color space, it becomes difficult to find the RGB gamma voltage and the corresponding color coordinates and brightness. Therefore, it is necessary to develop an effective and high-precision gamma voltage debugging method.

From the above description, it can be seen that a new gamma voltage debugging method is urgently needed in the art.

The main purpose of the present invention is to provide a gamma voltage debugging method, which is applied to a display debugging system including a measuring device and a control unit, and is executed by the control unit to perform a gamma voltage debugging on a display. In particular, the method of the present invention first establishes a three-dimensional space based on a plurality of gamma voltage groups, and then confirms whether the error value of the color coordinates and brightness of the center point of the three-dimensional space and the color coordinates and brightness of a target point is lower than a predetermined value. If not, a secondary three-dimensional space is found based on the center point, the target point and the end points of the three-dimensional space, and then confirms whether the error value of the color coordinates and brightness of the center point of the secondary three-dimensional space and the color coordinates and brightness of the target point is lower than a predetermined value. If yes, a set of central gamma voltage groups corresponding to the central point is used as a target gamma voltage group. If no, the search and establishment of a secondary three-dimensional space is iteratively performed, and it is confirmed whether the error value between the color coordinates and brightness of the central point of the secondary three-dimensional space and the color coordinates and brightness of the target point is lower than a predetermined value.

Simply put, each Gamma binding point corresponds to a gamma voltage group, and the gamma voltage group includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value. When the gamma voltage debugging method of the present invention is used, a gamma voltage group corresponding to the target Gamma binding point can be gradually approached and found by iteratively searching a smaller secondary three-dimensional space in the three-dimensional space. The gamma voltage set is then stored in the display driver chip.

To achieve the above-mentioned purpose, the present invention proposes an embodiment of the gamma voltage debugging method, which is executed by a control unit to perform a gamma voltage debugging on a display, wherein the display includes a display panel and at least one display driver chip, and the gamma voltage debugging method includes the following steps: Determine P gamma voltage groups and a first center gamma voltage group according to a maximum gamma voltage digital value and a minimum gamma voltage digital value; wherein P is a positive integer; Establish a first three-dimensional space containing a first center point with the P gamma voltage groups as P first endpoints; Calculate an error value between a first center debugging data corresponding to the first center point and a target data; When the error value is less than a predetermined value, the first center gamma voltage group is used as a target gamma voltage group and stored in the display driver chip; When the error value is greater than or equal to the predetermined value, an endpoint reset operation is performed, thereby resetting the P 1+Jth endpoints according to the target data, the first center debugging data, and the P 1st debugging data corresponding to the P 1st endpoints; wherein J is a positive integer with a starting value of 1; A secondary space establishment operation is performed, thereby using the P 1+Jth endpoints to establish a 1+Jth three-dimensional space containing a 1+Jth center point; An error calculation operation is performed on the target data and a 1+J center debugging data corresponding to the 1+J center point, thereby obtaining an error value between the 1+J center debugging data and the target data; When the error value is greater than or equal to the predetermined value, an iteration operation is performed, thereby adding 1 to the value of J, and then repeatedly performing the aforementioned endpoint reset operation, the aforementioned secondary space establishment operation, and the aforementioned error calculation operation until the error value is less than the predetermined value and the iteration operation is stopped; and When the error value is less than the predetermined value, the 1+J center gamma voltage group is used as the target gamma voltage group and stored in the display driver chip.

In one embodiment, in the compressed display data, the 1st center point is determined based on the P 1st endpoints, and the 1+Jth center point is determined based on the 1+Jth endpoints.

In one embodiment, in the compressed display data, the gamma voltage group includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value, the first center gamma voltage group includes a first center red gamma voltage digital value, a first center green gamma voltage digital value, and a first center blue gamma voltage digital value, and the 1+J center gamma voltage group includes a 1+J center red gamma voltage digital value, a 1+J center green gamma voltage digital value, and a 1+J center blue gamma voltage digital value.

In one embodiment, the first center debug data and the P first debug data are obtained by executing the following data measurement steps: Enabling the display driver chip to perform a display drive operation, thereby driving the display panel to display an image according to one of the gamma voltage groups or the first center gamma voltage group; Enabling a measurement device to perform a data measurement operation, thereby measuring the first debug data or the first center debug data from the image; wherein the first debug data includes a first color coordinate and a first display brightness, and the first center debug data includes a first center color coordinate and a first center display brightness; and Repeat the display drive operation and the data measurement operation P+1 times to measure the P first debugging data and the first center debugging data.

In one embodiment, the P 1+Jth endpoints correspond to P 1+Jth debugging data, and the 1+Jth center debugging data and the P 1+Jth debugging data are obtained by executing the following data measurement steps: Enabling the display driver chip to perform a display driving operation, thereby driving the display panel to display an image according to a 1+Jth gamma voltage group or the 1+Jth center gamma voltage group corresponding to one of the 1+Jth debugging data; A measuring device is enabled to perform a data measurement operation, thereby measuring the 1+Jth debugging data or the 1+Jth center debugging data from the image; wherein the 1+Jth debugging data includes a 1+Jth color coordinate and a 1+Jth display brightness, and the 1+Jth center debugging data includes a 1+Jth center color coordinate and a 1+Jth center display brightness; and Repeat the display driving operation and the data measurement operation P+1 times to measure the P 1+Jth debugging data and the 1+Jth center debugging data.

Furthermore, the present invention also proposes a display debugging system, which includes a control device and a measuring device; the characteristic is that the control unit device executes a gamma voltage debugging method to perform a gamma voltage debugging on a display, wherein the display includes a display panel and at least one display driver chip, and the gamma voltage debugging method includes the following steps: Determine P gamma voltage groups and a first center gamma voltage group according to a maximum gamma voltage digital value and a minimum gamma voltage digital value; wherein P is a positive integer; Establish a first three-dimensional space containing a first center point with the P gamma voltage groups as P first endpoints; Calculate an error value between a first center debugging data corresponding to the first center point and a target data; When the error value is less than a predetermined value, store the first center gamma voltage group as a target gamma voltage group in the display driver chip; When the error value is greater than or equal to the predetermined value, perform an endpoint reset operation, thereby resetting P 1+J endpoints according to the target data, the first center debugging data, and the P 1st debugging data corresponding to the P 1st endpoints; wherein J is a positive integer with a starting value of 1; Perform a secondary space establishment operation, thereby using the P 1+Jth endpoints to establish a 1+Jth three-dimensional space containing a 1+Jth center point; An error calculation operation is performed on the target data and a 1+J center debugging data corresponding to the 1+J center point, thereby obtaining an error value between the 1+J center debugging data and the target data; When the error value is greater than or equal to the predetermined value, an iteration operation is performed, thereby adding 1 to the value of J, and then repeatedly performing the aforementioned endpoint reset operation, the aforementioned secondary space establishment operation, and the aforementioned error calculation operation until the error value is less than the predetermined value and the iteration operation is stopped; and When the error value is less than the predetermined value, the 1+J center gamma voltage group is used as the target gamma voltage group and stored in the display driver chip.

In one embodiment, the display panel is any one selected from the group consisting of an LCD panel, an OLED panel, an LED panel, a Micro-LED panel, and a QLED panel.

In one embodiment, the measuring device is any one selected from the group consisting of a CCD camera, a spectroradiometer, and a color analyzer.

In one embodiment, the control device is any one selected from the group consisting of a desktop computer, a laptop computer, an all-in-one computer, a tablet computer, and an industrial computer.

In one embodiment, in the compressed display data, the 1st center point is determined based on the P 1st endpoints, and the 1+Jth center point is determined based on the 1+Jth endpoints.

In one embodiment, in the compressed display data, the gamma voltage group includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value, the first center gamma voltage group includes a first center red gamma voltage digital value, a first center green gamma voltage digital value, and a first center blue gamma voltage digital value, and the 1+J center gamma voltage group includes a 1+J center red gamma voltage digital value, a 1+J center green gamma voltage digital value, and a 1+J center blue gamma voltage digital value.

In one embodiment, the first center debug data and the P first debug data are obtained by executing the following data measurement steps: Enabling the display driver chip to perform a display drive operation, thereby driving the display panel to display an image according to one of the gamma voltage groups or the first center gamma voltage group; Enabling a measurement device to perform a data measurement operation, thereby measuring the first debug data or the first center debug data from the image; wherein the first debug data includes a first color coordinate and a first display brightness, and the first center debug data includes a first center color coordinate and a first center display brightness; and Repeat the display drive operation and the data measurement operation P+1 times to measure the P first debugging data and the first center debugging data.

In one embodiment, the P 1+Jth endpoints correspond to P 1+Jth debugging data, and the 1+Jth center debugging data and the P 1+Jth debugging data are obtained by executing the following data measurement steps: Enabling the display driver chip to perform a display driving operation, thereby driving the display panel to display an image according to a 1+Jth gamma voltage group or the 1+Jth center gamma voltage group corresponding to one of the 1+Jth debugging data; A measuring device is enabled to perform a data measurement operation, thereby measuring the 1+Jth debugging data or the 1+Jth center debugging data from the image; wherein the 1+Jth debugging data includes a 1+Jth color coordinate and a 1+Jth display brightness, and the 1+Jth center debugging data includes a 1+Jth center color coordinate and a 1+Jth center display brightness; and Repeat the display driving operation and the data measurement operation P+1 times to measure the P 1+Jth debugging data and the 1+Jth center debugging data.

In order to enable the Review Committee to further understand the structure, features, purpose, and advantages of the present invention, the following are attached with drawings and detailed descriptions of preferred specific embodiments.

FIG. 2 is a block diagram of a display debugging system applying a gamma voltage debugging method of the present invention. As shown in FIG. 2 , the display debugging system 2 mainly includes: a measuring device 21 and a control device 22 , wherein the measuring device 21 is configured to face a display panel 11 , and the control device 22 is coupled to the display panel 11 . The measuring device 21 and at least one display driving chip 12 are used to drive the display panel 11 to display images. It should be understood that the display panel 11 and the at least one display driving chip 12 are the main structural units of a display 1, and the display panel 11 can be, but is not limited to, an LCD panel, an OLED panel, an LED panel, a Micro-LED panel, or QLED panel. On the other hand, the measuring device 21 may be, but is not limited to, a CCD camera, a spectroradiometer or a color analyzer. Furthermore, the control device 22 may be, but is not limited to, a desktop computer, a notebook computer, an all-in-one computer, a tablet computer, or an industrial computer.

In particular, the present invention provides a gamma voltage debugging method, which is executed by the control device 22 of the display debugging system 2, thereby performing a gamma voltage debugging on the display 1 to find a target gamma voltage set corresponding to a gamma binding point, and storing the target gamma voltage set in the display driver chip 12. FIG. 3A and FIG. 3B show a flow chart of a gamma voltage debugging method of the present invention. As shown in FIG. 3A , the method flow first executes steps S1-S2: P gamma voltage groups and a first center gamma voltage group are determined according to a maximum gamma voltage digital value and a minimum gamma voltage digital value, and then a first three-dimensional space containing a first center point is established with the P gamma voltage groups as P first endpoints. According to the design of the present invention, P is a positive integer. For example, the display driver chip 12 includes a gamma voltage generating unit 121 for generating 1024 gamma voltages; correspondingly, all 1024 gamma voltage digital values of the display driver chip 12 are used to select the corresponding 1024 gamma voltages, i.e., 0-1023. In this example, 0 is the minimum gamma voltage digital value (or register value), and 1023 is the maximum gamma voltage digital value.

On the other hand, a gamma voltage set includes a red gamma voltage digital value , a green gamma voltage digital value and a blue gamma voltage digital value Therefore, the P gamma voltage groups include: (0,0,0), (1023,0,0), (0,1023,0), (0,0,1023), (1023,1023,0), (1023,0,1023), (0,1023,1023), and (1023,1023,1023). In this way, a first three-dimensional space containing a first center point can be established with the P gamma voltage groups as the P first endpoints. FIG4 is a diagram of the first three-dimensional space. As shown in FIG4 , the eight endpoints (0,0,0), (1023,0,0), (0,1023,0), (0,0,1023), (1023,1023,0), (1023,0,1023), (0,1023,1023), and (1023,1023,1023) can enclose a first three-dimensional space. At the same time, these eight endpoints can make the first center point of the first three-dimensional space (512, 512, 512). That is, the first center point corresponds to a first center gamma voltage set, and the first center gamma voltage set includes a first center red gamma voltage digital value, a first center green gamma voltage digital value, and a first center blue gamma voltage digital value.

Further, as shown in FIG. 3A , the method flow then executes step S3: calculating an error value between a first center debugging data corresponding to the first center point and a target data. Specifically, the target data includes a target color coordinate ( , ) and a target brightness , that is, the target data corresponds to an xyY coordinate in a CIE xyY color space ( , ). Moreover, the target data corresponds to a target gamma voltage set, and the target gamma voltage set includes a target red gamma voltage digital value, a target green gamma voltage digital value, and a target blue gamma voltage digital value. Therefore, the target data can mark a target point in the first three-dimensional space as shown in FIG. 4 ( , , ), and the first center point of the first three-dimensional space is ( =512, =512, =512).

It should be understood that there is a target gamma voltage set for the display driver chip 12 to drive the display panel 11 to display an image, and the color coordinates and brightness of the image meet the target color coordinates and the target brightness. Therefore, the gamma voltage debugging method of the present invention gradually approaches and finds a gamma voltage set corresponding to the target gamma voltage set by iteratively searching a smaller secondary three-dimensional space in the first three-dimensional space.

Before executing the error value calculation of step S3, a first center debugging data corresponding to the first center point and P first debugging data corresponding to the P first end points must be measured, wherein the first center debugging data includes a first center color coordinate ( , ) and a first center display brightness , and each of the first debugging data includes a first color coordinate ( , ) and a first display brightness . Specifically, the first center debug data and the P first debug data are obtained by executing the following data measurement steps: enabling the display driver chip 12 to perform a display drive operation, thereby driving the display panel 11 to display an image according to one of the gamma voltage groups or the first center gamma voltage group; enabling the measurement device 21 to perform a data measurement operation, thereby measuring the first debug data or the first center debug data from the image; and repeating the display drive operation and the data measurement operation P+1 times to measure the P first debug data and the first center debug data.

Specifically, the error value can be calculated using the following mathematical formula (1): ················(1)

In the above formula (1), err is the error value, ( , ) is the center color coordinate, and is the center display brightness, applied in step S3, ( , )=( , ),and = After the calculation of the error value is completed, as shown in FIG. 3A and FIG. 4 , the method flow then executes step S4: when the error value is less than a predetermined value (e.g., 1%), the first center gamma voltage group is used as a target gamma voltage group and stored in the display driver chip 12. It should be understood that if the error value is greater than the predetermined value, the execution condition of step S4 is not established, and the method flow will then execute step S5: when the error value is greater than or equal to the predetermined value, an endpoint reset operation is performed, thereby resetting the P 1+J th endpoints according to the target data, the first center debugging data, and the P 1st debugging data corresponding to the P 1st endpoints. Before describing the detailed execution steps of step S5, it must be explained that the correspondence between the P first debugging data and the P gamma voltage groups is exemplarily shown in the following table (1): Table (1) Gamma Voltage Group( , , ) Corresponding to the first debugging data measured ( , , ), n=0~8 (0, 0, 0) ( , , ) (1023, 0, 0) ( , , ) (0, 1023, 0) ( , , ) (0, 0, 1023) ( , , ) (1023, 1023, 0) ( , , ) (1023, 0, 1023) ( , , ) (0, 1023, 1023) ( , , ) (1023, 1023, 1023) ( , , ) (512, 512, 512) ( , , )= ( , , )

It is particularly noted that the correspondence between the P first debugging data and the P gamma voltage groups listed in the above table (1) is only an example and is not a restrictive correspondence. That is, in actual application, the correspondence can be changed by oneself. To explain in more detail, the detailed execution steps of step S5 are as follows. First, for the target data ( , , ) and the P first debugging data ( , , ) and the first center debugging data ( , , ) are compared and sorted, and then P 1+Jth endpoints are determined according to the comparison and sorting results; wherein J is a positive integer with a starting value of 1. After obtaining the P 1+Jth endpoints, as shown in FIG3B , the method flow then executes step S6: executing a secondary space establishment operation, thereby using the P 1+Jth endpoints to establish a 1+Jth three-dimensional space containing a 1+Jth center point.

FIG5 is a diagram of the (1+1=2)th three-dimensional space. It is worth noting that in the first three-dimensional space shown in FIG4, the target point corresponding to the target data includes a target red gamma voltage digital value, a target green gamma voltage digital value and a target blue gamma voltage digital value. Moreover, the target red gamma voltage digital value is between =512 and =1023, the target green gamma voltage digital value is between =0 and =512, and the target blue gamma voltage digital value is between =0 and =512. Therefore, we can select the eight endpoints (512,0,0), (512,512,0), (1023,0,0), (1023,512,0), (512,0,512), (1023,0,512), (512,512,512), and (1023,512,512) to create the second three-dimensional space as shown in Figure 5. At the same time, these eight endpoints determine the center point of the second three-dimensional space to be (768, 256, 256). That is, each of the 1+J end points corresponds to a 1+J gamma voltage group, and the 1+J gamma voltage group includes a 1+J red gamma voltage digital value, a 1+J green gamma voltage digital value, and a 1+J blue gamma voltage digital value. Similarly, the 1+J center point corresponds to a 1+J center gamma voltage group, and the 1+J center gamma voltage group includes a 1+J center red gamma voltage digital value, a 1+J center green gamma voltage digital value, and a 1+J center blue gamma voltage digital value.

As shown in FIG. 3B and FIG. 5 , the method flow then executes step S7: for the target data ( , , ) and a 1+J center debugging data corresponding to the 1+J center point ( , , ) performs an error calculation operation to obtain an error value between the 1+J center debugging data and the target data. It should be noted that before executing step S7, a 1+J center debugging data corresponding to the 1+J center point and P 1+J debugging data corresponding to the P 1+J end points must be measured first, and they are obtained by executing the following data measurement steps: enabling the display driver chip 12 to perform a display driving operation, thereby driving the display panel to display an image according to a 1+J gamma voltage group or the 1+J center gamma voltage group corresponding to one of the 1+J debugging data; A measuring device 21 is enabled to perform a data measuring operation, thereby measuring the 1+Jth debugging data or the 1+Jth center debugging data from the image; wherein the 1+Jth debugging data includes a 1+Jth color coordinate and a 1+Jth display brightness, and the 1+Jth center debugging data includes a 1+Jth center color coordinate and a 1+Jth center display brightness; and the display driving operation and the data measuring operation are repeated P+1 times to measure the P 1+Jth debugging data and the 1+Jth center debugging data.

Thus, the error value can be calculated using the above mathematical formula (1). Applied in step S7, ( , )=( , ),and = If the second center point shown in Figure 5 corresponds to the second center debugging data ( , , ) and the target data ( , , ) is still greater than 1% (i.e., a predetermined value), the method flow then executes step S8: when the error value is greater than or equal to the predetermined value, an iterative operation is performed, so that after adding 1 to the value of J, the aforementioned endpoint reset operation (i.e., repeating step S5), the aforementioned secondary space establishment operation (i.e., repeating step S6) and the aforementioned error calculation operation (i.e., repeating step S7) are then repeatedly performed until the error value is less than the predetermined value and the iterative operation is stopped. That is, if the error value is still greater than 1%, a more secondary third three-dimensional space is searched out in the second three-dimensional space as shown in FIG5, and then the third center debugging data ( , , ) and the target data ( , , ) is less than a predetermined value. If so, the method flow finally executes step S9: when the error value is less than the predetermined value, the 1+J-th center gamma voltage set is used as the target gamma voltage set and stored in the display driver chip 12.

It should be understood that one Gamma binding point corresponds to one target data ( , , ), therefore, multiple Gamma binding points correspond to multiple target data. FIG6 is a data scatter diagram of 21 Gamma binding points relative to the error value. As shown in FIG6, when the Gamma voltage debugging method of the present invention is used, 21 Gamma voltage groups corresponding to the 21 target Gamma binding points can be found by iteratively searching a smaller secondary three-dimensional space in the three-dimensional space, and the central debugging data ( , , ) and the target data ( , , ) are all less than a predetermined value (1%). Finally, the 21 gamma voltage sets are stored in the display driver chip 12.

Thus, the above has completely and clearly described a gamma voltage debugging method of the present invention; and, from the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a gamma voltage debugging method, which is applied to a display debugging system including a measuring device and a control unit, and is executed by the control unit to perform a gamma voltage debugging on a display. In particular, the method of the present invention first establishes a three-dimensional space based on a plurality of gamma voltage groups, and then confirms whether the error value of the color coordinates and brightness of the center point of the three-dimensional space and the color coordinates and brightness of a target point is lower than a predetermined value. If not, a secondary three-dimensional space is found based on the center point, the target point, and the end points of the three-dimensional space, and then confirms whether the error value of the color coordinates and brightness of the center point of the secondary three-dimensional space and the color coordinates and brightness of the target point is lower than a predetermined value. If so, use a central gamma voltage group corresponding to the center point as a target gamma voltage group. If not, then iteratively perform the search and establishment of the secondary three-dimensional space, and confirm whether the error value between the color coordinates and brightness of the center point of the secondary three-dimensional space and the color coordinates and brightness of the target point is lower than a predetermined value. Simply put, each Gamma binding point corresponds to a gamma voltage group, and the gamma voltage group includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value. When the gamma voltage debugging method of the present invention is used, a gamma voltage set corresponding to the target gamma binding point can be gradually approached and found by iteratively searching a smaller secondary three-dimensional space in the three-dimensional space, and then the gamma voltage set is stored in the display driver chip.

(2) In addition, the present invention also discloses a display debugging system including a control device and a measuring device, wherein the control unit device executes the gamma voltage debugging method of the present invention as described above to perform a gamma voltage debugging on a display, thereby finding a gamma voltage set corresponding to a target gamma binding point, and then storing the gamma voltage set in a display driver chip of the display.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment. Any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by people familiar with the art do not deviate from the scope of the patent rights of this case.

In summary, this case shows that its purpose, means and effects are all different from the known technology, and it is the first invention that is practical and indeed meets the patent requirements for invention. We sincerely request the review committee to examine this carefully and grant a patent as soon as possible to benefit the society. This is our utmost prayer.

1a: Display

11a: Display Panel

12a: Display driver chip

121a: Gamma voltage generating unit

2a: Host computer

1: Display

11: Display Panel

12: Display driver chip

121: Gamma voltage generating unit

2: Display debugging system

21: Measuring device

22: Control device

S1: Determine P gamma voltage sets and a first center gamma voltage set according to a maximum gamma voltage digital value and a minimum gamma voltage digital value

S2: Using the P gamma voltage groups as P first endpoints, establish a first three-dimensional space containing a first center point.

S3: Calculate an error value between a first center debugging data and a target data corresponding to the first center point

S4: When the error value is less than a predetermined value, the first center gamma voltage set is used as a target gamma voltage set and stored in the display driver chip.

S5: When the error value is greater than or equal to the predetermined value, an endpoint reset operation is performed to reset the P 1+J endpoints according to the target data, the first center debugging data, and the P 1st debugging data corresponding to the P 1st endpoints.

S6: Perform a secondary space creation operation, thereby using the P 1+Jth endpoints to create a 1+Jth three-dimensional space containing a 1+Jth center point.

S7: Perform an error calculation operation on the target data and the 1+J center debugging data corresponding to the 1+J center point, thereby obtaining an error value between the 1+J center debugging data and the target data.

S8: When the error value is greater than or equal to the predetermined value, an iterative operation is performed, whereby after adding 1 to the value of J, the aforementioned endpoint reset operation, the aforementioned secondary space establishment operation, and the aforementioned error calculation operation are then repeatedly performed until the error value is less than the predetermined value, and the iterative operation is stopped.

S9: When the error value is less than the predetermined value, the 1+J center gamma voltage set is used as the target gamma voltage set and stored in the display driver chip.

FIG1 is a block diagram of a known flat panel display; FIG2 is a block diagram of a display debugging system using a gamma voltage debugging method of the present invention; FIG3A and FIG3B are flow charts of a gamma voltage debugging method of the present invention; FIG4 is a diagram of the first three-dimensional space; FIG5 is a diagram of the second three-dimensional space; and FIG6 is a data scatter diagram of 21 gamma binding points relative to error values.

S1: Determine P gamma voltage groups and a first center gamma voltage group based on a maximum gamma voltage digital value and a minimum gamma voltage digital value

S2: Using the P gamma voltage groups as P first endpoints, establish a first three-dimensional space containing a first center point

S3: Calculate an error value between a first center debugging data and a target data corresponding to the first center point

S4: When the error value is less than a predetermined value, the first center gamma voltage group is used as a target gamma voltage group and stored in the display driver chip.

S5: When the error value is greater than or equal to the predetermined value, an endpoint reset operation is performed, thereby resetting the P 1st+J endpoints according to the target data, the 1st center debugging data, and the P 1st debugging data corresponding to the P 1st endpoints

Claims (10)

A gamma voltage debugging method is executed by a control unit to perform a gamma voltage debugging on a display, wherein the display includes a display panel and at least one display driver chip, and the gamma voltage debugging method includes the following steps: determining P gamma voltage groups and a first center gamma voltage group according to a maximum gamma voltage digital value and a minimum gamma voltage digital value; wherein P is a positive integer; establishing a gamma voltage group containing a first center gamma voltage group with the P gamma voltage groups as P first endpoints; a first three-dimensional space of a first center point; calculating an error value between a first center debugging data and a target data corresponding to the first center point; when the error value is less than a predetermined value, storing the first center gamma voltage group as a target gamma voltage group in the display driver chip; when the error value is greater than or equal to the predetermined value, performing an end point reset operation, thereby resetting the end point according to the target data, the first center debugging data and the P first center points; 1 endpoint, wherein P 1st debugging data of the 1st endpoint are reset to P 1+J th endpoints; wherein J is a positive integer with a starting value of 1; performing a secondary space establishment operation, thereby using the P 1+J th endpoints to establish a 1+J th three-dimensional space containing a 1+J th center point; performing an error calculation operation on the target data and a 1+J th center debugging data corresponding to the 1+J th center point, thereby obtaining an error value between the 1+J th center debugging data and the target data; When the error value is greater than or equal to the predetermined value, an iterative operation is performed, so that after adding 1 to the value of J, the aforementioned endpoint reset operation, the aforementioned secondary space establishment operation, and the aforementioned error calculation operation are repeatedly performed until the error value is less than the predetermined value and the iterative operation is stopped; and when the error value is less than the predetermined value, the 1+Jth center gamma voltage group is used as the target gamma voltage group and stored in the display driver chip. The gamma voltage debugging method as described in claim 1, wherein the first center point is determined based on the P first endpoints, and the 1+Jth center point is determined based on the 1+Jth endpoints. A gamma voltage debugging method as described in claim 1, wherein the gamma voltage group includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value, the first center gamma voltage group includes a first center red gamma voltage digital value, a first center green gamma voltage digital value, and a first center blue gamma voltage digital value, and the 1+J center gamma voltage group includes a 1+J center red gamma voltage digital value, a 1+J center green gamma voltage digital value, and a 1+J center blue gamma voltage digital value. The gamma voltage debugging method as described in claim 3, wherein the first center debugging data and the P first debugging data are obtained by executing the following data measurement steps: enabling the display driver chip to execute a display driving operation, thereby driving the display panel to display an image according to one of the gamma voltage groups or the first center gamma voltage group; enabling a measurement device to execute a data measurement operation, thereby obtaining a display image from the image; The first debugging data or the first center debugging data is measured; wherein the first debugging data includes a first color coordinate and a first display brightness, and the first center debugging data includes a first center color coordinate and a first center display brightness; and the display driving operation and the data measurement operation are repeated P+1 times to measure the P first debugging data and the first center debugging data. The gamma voltage debugging method as described in claim 1, wherein the P 1+Jth endpoints correspond to P 1+Jth debugging data, and the 1+Jth center debugging data and the P 1+Jth debugging data are obtained by executing the following data measurement steps: enabling the display driver chip to execute a display driving operation, thereby driving the display panel to display an image according to a 1+Jth gamma voltage group or the 1+Jth center gamma voltage group corresponding to one of the 1+Jth debugging data; enabling a measurement device to execute Perform a data measurement operation to measure the 1+Jth debugging data or the 1+Jth center debugging data from the image; wherein the 1+Jth debugging data includes a 1+Jth color coordinate and a 1+Jth display brightness, and the 1+Jth center debugging data includes a 1+Jth center color coordinate and a 1+Jth center display brightness; and repeat the display driving operation and the data measurement operation P+1 times to measure the P 1+Jth debugging data and the 1+Jth center debugging data. A display debugging system includes a control device and a measuring device; the control device executes a gamma voltage debugging method to perform a gamma voltage debugging on a display, wherein the display includes a display panel and at least one display driver chip, and the gamma voltage debugging method includes the following steps: determining P gamma voltage groups and a first center gamma voltage group according to a maximum gamma voltage digital value and a minimum gamma voltage digital value; wherein P is a positive integer; P gamma voltage groups establish a first three-dimensional space containing a first center point for P first endpoints; calculate an error value between a first center debugging data corresponding to the first center point and a target data; when the error value is less than a predetermined value, store the first center gamma voltage group as a target gamma voltage group in the display driver chip; when the error value is greater than or equal to the predetermined value, perform an endpoint reset operation, thereby resetting the display driver chip according to the target data, the first center debugging data, and the target data. The method comprises the steps of: resetting P 1+J th endpoints by using the P 1+J th center debugging data and the P 1+J th debugging data corresponding to the P 1+J th endpoints; wherein J is a positive integer with a starting value of 1; performing a secondary space establishment operation, thereby establishing a 1+J th three-dimensional space containing a 1+J th center point by using the P 1+J th endpoints; performing an error calculation operation on the target data and the 1+J th center debugging data corresponding to the 1+J th center point, thereby obtaining the error between the 1+J th center debugging data and the target data; an error value between the first and second center gamma voltage groups; when the error value is greater than or equal to the predetermined value, an iterative operation is performed, so that after adding 1 to the value of J, the aforementioned endpoint reset operation, the aforementioned secondary space establishment operation, and the aforementioned error calculation operation are repeatedly performed until the error value is less than the predetermined value and the iterative operation is stopped; and when the error value is less than the predetermined value, the 1+Jth center gamma voltage group is used as the target gamma voltage group and stored in the display driver chip. A display debugging system as described in claim 6, wherein the 1st center point is determined based on the P 1st endpoints, and the 1+Jth center point is determined based on the 1+Jth endpoints. A display debugging system as described in claim 6, wherein the gamma voltage set includes a red gamma voltage digital value, a green gamma voltage digital value, and a blue gamma voltage digital value, the first center gamma voltage set includes a first center red gamma voltage digital value, a first center green gamma voltage digital value, and a first center blue gamma voltage digital value, and the 1+Jth center gamma voltage set includes a 1+Jth center red gamma voltage digital value, a 1+Jth center green gamma voltage digital value, and a 1+Jth center blue gamma voltage digital value. The display debugging system as described in claim 8, wherein the first center debugging data and the P first debugging data are obtained by executing the following data measurement steps: enabling the display driver chip to execute a display driving operation, thereby driving the display panel to display an image according to one of the gamma voltage groups or the first center gamma voltage group; enabling the measurement device to execute a data measurement operation, thereby obtaining a display image from the image; The first debugging data or the first center debugging data is measured; wherein the first debugging data includes a first color coordinate and a first display brightness, and the first center debugging data includes a first center color coordinate and a first center display brightness; and the display driving operation and the data measurement operation are repeated P+1 times to measure the P first debugging data and the first center debugging data. The display debugging system as described in claim 6, wherein the P 1+J end points correspond to P 1+J debugging data, and the 1+J center debugging data and the P 1+J debugging data are obtained by executing the following data measurement steps: enabling the display driver chip to execute a display driving operation, thereby driving the display panel to display an image according to a 1+J gamma voltage group or the 1+J center gamma voltage group corresponding to one of the 1+J debugging data; enabling the measurement device to execute A data measurement operation is performed to measure the 1+Jth debugging data or the 1+Jth center debugging data from the image; wherein the 1+Jth debugging data includes a 1+Jth color coordinate and a 1+Jth display brightness, and the 1+Jth center debugging data includes a 1+Jth center color coordinate and a 1+Jth center display brightness; and the display driving operation and the data measurement operation are repeated P+1 times to measure the P 1+Jth debugging data and the 1+Jth center debugging data.

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