TWI854826B - Row crosstalk detection method, display driver chip and information processing device - Google Patents

Abstract

The present invention mainly discloses a row crosstalk detection method, which is executed by a display driver chip to perform a row crosstalk detection operation on a display data including M rows and N columns of grayscale data. The row crosstalk detection method of the present invention uses the data difference of two adjacent rows of grayscale data and the data complexity of each row of grayscale data to determine whether there is row crosstalk between the two adjacent rows of grayscale data. In addition, for row grayscale data with low complexity but excessive data jump, the row crosstalk detection method of the present invention will give appropriate compensation so that the image corresponding to the display data can be displayed normally on the display panel. On the other hand, for row grayscale data with high complexity and large data jump, the row crosstalk detection method of the present invention will choose not to compensate to avoid redundant compensation.

Description

Row crosstalk detection method, display driver chip and information processing device

The present invention relates to the field of OLED displays, and more particularly to a row crosstalk detection method for a display driver chip.

It is known that OLED panels have become the mainstream display panels for displays of mobile electronic devices such as smartphones, smart watches, tablet computers, and laptops due to their many advantages such as flexibility, self-luminescence, no need for backlight modules and color filters, no viewing angle restrictions, fast response speed, ultra-high contrast, and low power consumption. Of course, OLED panels are also used in the manufacture of OLED displays and OLED TVs. Electronic engineers familiar with the design and manufacture of OLED displays must know that existing OLED panels conventionally include: M gate lines, N source lines, and M×N sub-pixel units, where M and N are both positive integers, and each of the sub-pixel units includes an OLED element and a pixel circuit. In other words, a conventional OLED panel contains M rows of sub-pixel units and N columns of sub-pixel units.

Practical experience shows that when an OLED panel is driven by a display driver chip to display a high grayscale image, if the difference in a line of data (i.e., grayscale value) between two adjacent rows of sub-pixel units is too large, the two adjacent rows of sub-pixel units will produce line crosstalk in visual effect, thereby affecting the display quality of the OLED panel.

Currently, existing algorithms use the average difference of adjacent row data of an image as the basis for detecting row crosstalk. However, experiments have found that whether visual row crosstalk will occur is not only related to the average value of the row data, but also to the complexity of each row of the image data. In other words, existing algorithms do not use the complexity of each row of image data as the basis for detecting row crosstalk, which may lead to incorrect detection of row crosstalk data. It is conceivable that if incorrect row crosstalk data is detected, the display driver chip will make incorrect compensation or omission when compensating for the image data based on the detected row crosstalk data.

From the above description, it can be seen that an improved row crosstalk detection method is urgently needed in the art.

The main purpose of the present invention is to provide a row crosstalk detection method for a display driver chip to be executed, which determines whether there is row crosstalk between two adjacent row grayscale data based on the data difference of the two adjacent row grayscale data and the data complexity of each row grayscale data. In addition, for row grayscale data with low complexity but excessive data jump, the row crosstalk detection method of the present invention will provide appropriate compensation so that the image corresponding to the display data can be displayed normally on the display panel. On the other hand, for row grayscale data with high complexity and excessive data jump, the row crosstalk detection method of the present invention will choose not to compensate to avoid redundant compensation.

To achieve the above-mentioned purpose, the present invention proposes an embodiment of the row crosstalk detection method, which is executed by a display driver chip to perform a row crosstalk detection operation on a display data, wherein the display data includes M rows and N columns of grayscale data, M and N are both positive integers, and the row crosstalk detection method includes the following steps: Perform a data change detection operation on each row of grayscale data, thereby obtaining the total number of M data changes corresponding to the M rows of grayscale data; Perform a data average operation on each row of grayscale data, thereby obtaining the average value of M rows; Generate M-1 differences using M row averages; wherein the ith difference is obtained by performing a difference operation on the ith row average and the i+1th row average, and i∈M; Determine whether the total number of changes in the i+1th data is less than a predetermined value to obtain a first result, and determine whether the ith difference is not 0 to obtain a second result; Perform an AND logic operation on the first result and the second result, and confirm that there is a row of crosstalk between the ith row and the i+1th row of grayscale data when an output value of the AND logic operation is true; and When the output value is false, it is confirmed that there is no row crosstalk between the i-th row and the i+1-th row grayscale data.

In a feasible embodiment, the row crosstalk detection method of the present invention further includes the following steps: After confirming that the row crosstalk exists between the i-th row and the i+1-th row of grayscale data, a data compensation operation is performed on the i-th row and the i+1-th row of grayscale data.

In another feasible embodiment, the row crosstalk detection method of the present invention further includes the following steps: After performing multiple data compensation operations to eliminate multiple row crosstalks, an output display data is generated.

In one embodiment, the data change detection operation includes the following steps: Reading N grayscale values contained in the i-th row of grayscale data; When the j+1-th grayscale value is different from the j-th grayscale value, recording a data change; and After completing the recording of multiple data changes, obtaining the total number of i-th data changes corresponding to the i-th row of grayscale data.

Furthermore, the present invention also provides an embodiment of a display driver chip, which is applied to a display device including a display panel; the display driver chip performs a row crosstalk detection method to perform a row crosstalk detection operation on a display data, and the row crosstalk detection operation includes the following steps: Perform a data change detection operation on each row of grayscale data, thereby obtaining M total data change times corresponding to M rows of grayscale data; Perform a data average operation on each row of grayscale data, thereby obtaining M row average values; Generate M-1 differences using M row averages; wherein the ith difference is obtained by performing a difference operation on the ith row average and the i+1th row average, and i∈M; Determine whether the total number of changes in the i+1th data is less than a predetermined value to obtain a first result, and determine whether the ith difference is not 0 to obtain a second result; Perform an AND logic operation on the first result and the second result, and confirm that there is a row of crosstalk between the ith row and the i+1th row of grayscale data when an output value of the AND logic operation is true; and When the output value is false, it is confirmed that there is no row crosstalk between the i-th row and the i+1-th row grayscale data.

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

In a feasible embodiment, the row crosstalk detection method further includes the following steps: After confirming that the row crosstalk exists between the i-th row and the i+1-th row of grayscale data, a data compensation operation is performed on the i-th row and the i+1-th row of grayscale data.

In another feasible embodiment, the row crosstalk detection method further includes the following steps: After performing multiple data compensation operations to eliminate multiple row crosstalks, an output display data is generated.

In one embodiment, the data change detection operation includes the following steps: Reading N grayscale values contained in the i-th row of grayscale data; When the j+1-th grayscale value is different from the j-th grayscale value, recording a data change; and After completing the recording of multiple data changes, obtaining the total number of i-th data changes corresponding to the i-th row of grayscale data.

Furthermore, the present invention also provides an embodiment of an information processing device, which is characterized in that it has at least one display driver chip of the present invention as described above.

In one embodiment, the information processing device is an electronic device selected from the group consisting of a liquid crystal display, a liquid crystal television, a smart phone, a smart watch, a tablet computer, a laptop computer, an all-in-one computer, a car entertainment system, a head-mounted display device, a video door machine, a multimedia information display device, and a digital camera.

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. 1 is a block diagram of a display device applying a row crosstalk detection method of the present invention. As shown in FIG. 1 , the display device 1 mainly includes: a display panel 11 and at least one display driver chip 12 . The row crosstalk detection method of the present invention is integrated into the display driver chip 12 in the form of a row crosstalk detection unit 121, so that it is executed by the display driver chip 12 to execute one row of display data including M rows and N columns of grayscale data. For crosstalk detection operation, M and N are both positive integers. In a feasible embodiment, the display panel 11 may be, but is not limited to, an OLED display panel, a Micro-LED display panel or a liquid crystal display panel.

FIG2 is a flow chart of a row crosstalk detection method of the present invention. As shown in FIG2, the method flow first executes step S1: a data change detection operation is executed for each row of grayscale data, thereby obtaining the total number of M data changes corresponding to M rows of grayscale data. In more detail, the data change detection operation includes a plurality of sub-steps, wherein the first and second sub-steps are: reading the N grayscale values (i∈M) contained in the i-th row of grayscale data, and when the j+1th grayscale value is different from the jth grayscale value (j∈N), recording a data change. Finally, the third sub-step is: after completing the recording of multiple data changes, the total number of i-th data changes corresponding to the i-th row of grayscale data is obtained.

As shown in FIG. 2 , the method flow then executes steps S2-S3: performing a data average operation on each row of grayscale data to obtain M row averages, and then using the M row averages to generate M-1 differences. According to the design of the present invention, the i-th difference is obtained by performing a difference operation on the i-th row average and the i+1-th row average. Continuing, the method flow executes step S4: determining whether the total number of changes of the i+1-th data is less than a predetermined value to obtain a first result, and determining whether the i-th difference is not 0 to obtain a second result. Afterwards, the method flow continues to execute step S5: perform an AND logic operation on the first result and the second result, and when an output value of the AND logic operation is a true value (true), confirm that there is a row crosstalk between the i-th row and the i+1-th row of grayscale data. For example, f, n and d represent the total number of data changes, the predetermined value and the difference respectively. If f<n&&d≠0 is true, it means that there is a row crosstalk between the i-th row and the i+1-th row of grayscale data. On the contrary, in step S6, if the output value is a false value (false), it is confirmed that there is no row crosstalk between the i-th row and the i+1-th row of grayscale data.

To explain in more detail, if it is confirmed that the row crosstalk exists between the i-th row and the i+1-th row grayscale data (i.e., step S5), the display driver chip 12 can then perform a data compensation operation on the i-th row and the i+1-th row grayscale data. Moreover, according to the design of the present invention, for row grayscale data with low complexity but excessive data jump, the row crosstalk detection method of the present invention will notify the display driver chip 12 to give appropriate compensation so that the image corresponding to the display data can be displayed normally on the display panel 11. For example, FIG. 3 is a first diagram of an image corresponding to a display data. As shown in FIG3, if the difference d between the grayscale data of two adjacent rows is 0, it means that the grayscale data of two adjacent rows does not have a large data jump, and data compensation is not performed at this time. In contrast, when d≠0 and f<10, data compensation is performed. On the other hand, FIG4 is a second diagram of an image corresponding to a display data. As shown in FIG4, for the grayscale data of the row with high complexity (such as: f>10) and large data jump (ie: d≠0), the row crosstalk detection method of the present invention will notify the display driver chip 12 not to perform compensation, thereby avoiding the occurrence of redundant compensation.

Thus, the above has completely and clearly described a row crosstalk detection 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 row crosstalk detection method for a display driver chip to be executed, which determines whether there is row crosstalk between two adjacent row grayscale data based on the data difference of the two adjacent row grayscale data and the data complexity of each row grayscale data. In addition, for row grayscale data with low complexity but large data jump, the row crosstalk detection method of the present invention will provide appropriate compensation so that the image corresponding to the display data can be displayed normally on the display panel. On the other hand, for row grayscale data with high complexity and large data jump, the row crosstalk detection method of the present invention will choose not to compensate to avoid redundant compensation.

(2) The present invention also discloses a display driver chip, which is applied to a display device including a display panel; its characteristic is that the display driver chip executes the row crosstalk detection method of the present invention as described above to perform a row crosstalk detection operation on a display data, so that when row crosstalk is detected between two adjacent rows of data, an appropriate data compensation operation is performed to avoid the occurrence of erroneous compensation or missed compensation.

(3) The present invention also discloses an embodiment of an information processing device, characterized in that it has at least one display driver chip of the present invention as described above. In one embodiment, the information processing device is an electronic device selected from the group consisting of a liquid crystal display, a liquid crystal television, a smart phone, a smart watch, a tablet computer, a notebook computer, an all-in-one computer, a car entertainment system, a head-mounted display device, a video door machine, a multimedia information display device, and a digital camera.

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 very 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.

1: Display device 11: Display panel 12: Display driver chip 121: Row crosstalk detection unit S1: Perform a data change detection operation on each row of grayscale data, thereby obtaining M total data change times corresponding to M rows of grayscale data S2: Perform a data average operation on each row of grayscale data, thereby obtaining M row average values S3: Generate M-1 difference values using the M row average values S4: Determine whether the total number of data changes of the i+1th row is less than a predetermined value to obtain a first result, and determine whether the ith difference value is not 0 to obtain a second result S5: Perform an AND logic operation on the first result and the second result, and when an output value of the AND logic operation is true (true), confirm that there is a row crosstalk between the i-th row and the i+1-th row of grayscale data S6: When the output value is false (false), confirm that there is no row crosstalk between the i-th row and the i+1-th row of grayscale data

FIG1 is a block diagram of a display device using a row crosstalk detection method of the present invention; FIG2 is a flow chart of a row crosstalk detection method of the present invention; FIG3 is a first diagram of an image corresponding to display data; and FIG4 is a second diagram of an image corresponding to display data.

S1: Perform a data change detection operation on each row of grayscale data, thereby obtaining the total number of M data changes corresponding to M rows of grayscale data.

S2: Perform a data average operation on each row of grayscale data to obtain M row averages

S3: Use the M average values of the rows to generate M-1 differences

S4: Determine whether the total number of changes in the i+1th data is less than a predetermined value to obtain a first result, and determine whether the i-th difference is not 0 to obtain a second result

S5: Perform an AND logic operation on the first result and the second result, and when an output value of the AND logic operation is true, confirm that there is a row of crosstalk between the i-th row and the i+1-th row of grayscale data.

S6: When the output value is false, confirm that there is no row crosstalk between the i-th row and the i+1-th row grayscale data.

Claims (8)

A row crosstalk detection method is executed by a display driver chip to perform a row crosstalk detection operation on a display data, wherein the display data includes M rows and N columns of grayscale data, M and N are both positive integers, and the row crosstalk detection method includes the following steps: performing a data change detection operation on each row of grayscale data, thereby obtaining M total data change times corresponding to the M rows of grayscale data; performing a data average operation on each row of grayscale data, thereby obtaining M row average values; using the M row average values to generate M-1 difference values; wherein the i-th difference value is obtained by performing a difference operation on the i-th row average value and the i+1-th row average value, and ...

M; determining whether the total number of changes of the i+1th data is less than a predetermined value to obtain a first result, and determining whether the i-th difference is not 0 to obtain a second result; performing an AND logic operation on the first result and the second result, and confirming that there is a difference between the i-th row and the i+1-th row of grayscale data when an output value of the AND logic operation is true. row crosstalk; and when the output value is a false value, confirming that the row crosstalk does not exist between the i-th row and the i+1-th row of grayscale data; wherein the data change detection operation comprises the following steps: reading N grayscale values contained in the i-th row of grayscale data; when the j+1-th grayscale value is different from the j-th grayscale value, recording a data change, j

N; and after completing the recording of multiple data changes, obtaining the total number of i-th data changes corresponding to the i-th row of grayscale data. The row crosstalk detection method as described in claim 1 further includes the following steps: after confirming that the row crosstalk exists between the i-th row and the i+1-th row of grayscale data, a data compensation operation is performed on the i-th row and the i+1-th row of grayscale data. The row crosstalk detection method as described in claim 2 further includes the following steps: after performing multiple data compensation operations to eliminate multiple row crosstalks, an output display data is generated. A display driver chip is applied to a display device including a display panel; the display driver chip is characterized in that the display driver chip executes a row crosstalk detection method to execute a row crosstalk detection operation on a display data, and the row crosstalk detection method includes the following steps: executing a data change detection operation on each row of grayscale data, thereby obtaining M total data change times corresponding to M rows of grayscale data respectively; executing a data average operation on each row of grayscale data, thereby obtaining M row average values; using the M row average values to generate M-1 difference values; wherein the i-th difference value is obtained by executing a difference operation on the i-th row average value and the i+1-th row average value, and ...

M; determining whether the total number of changes of the i+1th data is less than a predetermined value to obtain a first result, and determining whether the i-th difference is not 0 to obtain a second result; performing an AND logic operation on the first result and the second result, and confirming that there is a difference between the i-th row and the i+1-th row of grayscale data when an output value of the AND logic operation is true. row crosstalk; and when the output value is a false value, confirming that the row crosstalk does not exist between the i-th row and the i+1-th row of grayscale data; wherein the data change detection operation comprises the following steps: reading N grayscale values contained in the i-th row of grayscale data; when the j+1-th grayscale value is different from the j-th grayscale value, recording a data change, j

N; and after completing the recording of multiple data changes, obtaining the total number of i-th data changes corresponding to the i-th row of grayscale data. The display driver chip as described in claim 4, wherein the display panel is selected from any one of the group consisting of an OLED display panel, a Micro-LED display panel, and a liquid crystal display panel. The display driver chip as described in claim 4, wherein the row crosstalk detection method further includes the following steps: after confirming that the row crosstalk exists between the i-th row and the i+1-th row of grayscale data, a data compensation operation is performed on the i-th row and the i+1-th row of grayscale data. The display driver chip as described in claim 6, wherein the row crosstalk detection method further includes the following steps: after performing multiple data compensation operations to eliminate multiple row crosstalks, an output display data is generated. A display information processing device, characterized in that it has at least one display driver chip as described in any one of claim 4 to claim 7.