TWI795961B - Pixel compensation method for self-luminous display panel, flat display device and information processing device - Google Patents

Abstract

The invention mainly discloses a pixel compensation method of a self-luminous display panel, which is executed by a display driver chip, and is used for performing an IRC compensation operation on a self-luminous display panel. In particular, when the display driver chip uses a PWM signal with at least one active width to perform PWM brightness control on the self-luminous display panel, the method of the present invention controls the brightness of the self-luminous display panel according to a plurality of gate lines of the self-luminous display panel. The multiple display areas of the self-luminous display panel perform a panel load rate weighted average calculation, so as to obtain the equivalent panel load rate. The equivalent panel load rate can reflect the real load status of each display block of the self-luminous display panel operating in the PWM brightness control mode, so that the voltage drop compensation unit can be based on the equivalent panel load rate and the DBV set by the user. Value, and a display data transmitted by the host computer to determine the best compensation display data.

Description

Pixel compensation method for self-luminous display panel, flat display device and information processing device

The invention relates to the technical field of flat panel display devices, in particular to a pixel compensation method of a self-luminous display panel.

It is known that organic light-emitting diodes (Organic Light-Emitting Diode, OLED) have the advantages of self-luminous characteristics, high brightness, high contrast, wide viewing angle, power consumption, high reaction rate, etc., so it has been widely used in self-luminous Manufacturing of display panels, including AMOLED display panels and main PMOLED display panels.

FIG. 1 shows a block diagram of a conventional OLED display device. As shown in FIG. 1, the OLED display device 1a is applied in an electronic device (such as a smart phone), and mainly includes an OLED display panel 11a, a display driving circuit 12a, and a driving voltage supply circuit 13a, wherein the display The driving circuit 12a includes at least one display driving chip, and the OLED display panel 11a includes M×N OLED sub-pixels. During normal operation, the driving voltage supply circuit 13a transmits a first driving voltage ELV _DD and a second driving voltage ELV _SS through the power line to bias the OLED sub-pixels.

Electronic engineers familiar with the design and manufacture of AMOLED displays should know that IR drop is a major defect of the OLED display panel 11a. Therefore, for the OLED sub-pixels, the received first driving voltage ELV _DD and/or the second driving voltage ELV _SS will be changed due to the influence of the voltage drop, which causes uneven brightness of the panel. Therefore, as shown in FIG. 1 , in the conventional technology, a voltage drop compensation unit 121 a (ie, IR drop compensation algorithm) is provided in the display driver chip. FIG. 2 is a block diagram of the voltage drop compensation unit. As shown in FIG. 1 and FIG. 2, the voltage drop compensation unit 121a is used to adjust the host computer according to different panel loading ratios (Panel loading), different display gray scales and different brightness setting values (Digital Brightness Value, DBV). The transmitted input display data (Input display data) is subjected to brightness compensation (commonly known as IRC compensation in the industry).

Electronic engineers who are familiar with the design and manufacture of AMOLED displays also know that the brightness adjustment modes of the OLED display panel 11a include: PWM brightness adjustment mode, voltage scaling (Data scaling) mode and gamma adjustment mode. FIG. 3 shows a working timing diagram of a PWM signal, and FIG. 4 is a front view of the OLED display panel shown in FIG. 1 . When the OLED display panel 11a displays an image, the display driver chip can be operated in a PWM brightness control mode, so as to utilize the PWM signal shown in FIG. 3 to perform brightness control (Brightness control, BC).

FIG. 5A , FIG. 5B and FIG. 5C show front views of OLED display panels with PWM brightness control. Assuming that _the OLED display panel 11a has M gate lines and N source lines, as shown in FIG. At the first time when the OLED display panel 11a performs brightness adjustment, the first part of the image is driven and displayed by m gate lines and N source lines. Moreover, as shown in FIG. 5B , at the second time of brightness adjustment, the second part of the image is also driven and displayed by m gate lines and N source lines. Finally, as shown in FIG. 5C , at the third time of brightness adjustment, the third part of the image is also driven and displayed by m gate lines and N source lines.

FIG. 6 shows a graph of a number of light emission, and FIG. 7 shows a graph of another number of light emission. 5A, FIG. 5B, and FIG. 5C should be understood that the effective width W _PWM of the PWM signal determines the number of gate lines (that is, the value of m), and also determines the number of gate lines at the first time, the second time and/or the second time. The number of light-emitting times of each display area of the OLED display panel 11a that is regulated by the active width W _PWM within a three-time period. For example, as shown in FIG. 6 and FIG. 7 , a light-emitting number curve corresponding to the display area B is obviously different from a light-emitting number curve corresponding to the display area A. As shown in FIG. In other words, the load condition of the display area B is different from that of the display area A.

Electronic engineers who are familiar with the IRC compensation technology of OLED panels should know that the load factor of the panel is calculated by using a mathematical formula. However, under the PWM regulation mode, the light emission curve corresponding to the display area A and the light emission frequency curve corresponding to the display area B of the OLED display panel 11a are different, showing that different display areas are controlled by the PWM to different degrees, resulting in The panel load factor calculated by the formula will not conform to the real load condition of the OLED display panel 11a. Finally, as shown in FIG. 1 and FIG. 2 , the voltage drop compensation unit 121 a cannot perform optimal IRC compensation on the OLED display panel 11 a.

It can be seen from the above description that there is an urgent need in the art for a pixel compensation method for self-luminous display panels.

The main purpose of the present invention is to provide a pixel compensation method of a self-luminous display panel, which is implemented by a display driver chip, and is used to provide the most appropriate pixel compensation method for a self-luminous display panel operating in a PWM brightness control mode or other brightness control modes. ICR compensation.

In order to achieve the above object, the present invention proposes the pixel compensation method of the self-luminous display panel, which is executed by a display driver chip, in order to realize a voltage drop compensation operation for a self-luminous display panel, and includes the following steps:

receiving an input display data;

calculating an equivalent panel load rate of the self-luminous display panel by using a dynamic panel load calculation unit;

using a voltage drop compensation unit to determine an output display data according to the equivalent panel load ratio, a brightness setting value and the input display data; and

The self-luminous display panel is driven to display images according to the output display data.

In one embodiment, the dynamic panel load calculation unit has a look-up table of lighting times, and the look-up table of lighting times stores a plurality of lighting times.

In one embodiment, the plurality of gate lines of the self-luminous display panel and the plurality of said light-emitting times constitute a light-emitting number curve, and the light-emitting number curve is used for the self-luminous display panel along with the display driver chip. The working timing of a PWM signal that performs a PWM brightness adjustment is changed.

In one embodiment, the dynamic panel load calculation unit calculates the first panel load rate using the following mathematical formula:

為對應於第1條所述閘極線被驅動的一第一子負載率，

為對應於第2條所述閘極線被驅動的一第二子負載率，

為對應於第M條所述閘極線被驅動的一第M子負載率，

為耦接第1條所述閘極線之所述畫素的所述發光次數、

為耦接第2條所述閘極線之所述畫素的所述發光次數、且

為耦接第M條所述閘極線之所述畫素的所述發光次數。 Wherein, PL is the equivalent panel load factor,

for a first subload rate corresponding to the first said gate line being driven,

for a second subload rate corresponding to the second said gate line being driven,

is an Mth subload rate corresponding to the Mth gate line being driven,

is the number of light-emitting times of the pixel coupled to the first gate line,

is the number of light-emitting times of the pixel coupled to the second gate line, and

is the number of light-emitting times of the pixel coupled to the Mth gate line.

It is worth noting that the present invention also provides an embodiment of a flat panel display device, which includes a self-luminous display panel and at least one display driver chip, and is characterized in that the display driver chip performs a voltage drop of a self-luminous display panel. A compensation method, so as to realize a voltage drop compensation operation for the self-luminous display panel; the pixel compensation method of the self-luminous display panel, and includes the following steps:

receiving an input display data;

calculating an equivalent panel load rate of the self-luminous display panel by using a dynamic panel load calculation unit;

using a voltage drop compensation unit to determine an output display data according to the equivalent panel load ratio, a brightness setting value and the input display data; and

The self-luminous display panel is driven to display images according to the output display data.

In one embodiment, the dynamic panel load calculation unit has a look-up table of lighting times, and the look-up table of lighting times stores a plurality of lighting times.

In one embodiment, the plurality of gate lines of the self-luminous display panel and the plurality of said light-emitting times constitute a light-emitting number curve, and the light-emitting number curve is used for the self-luminous display panel along with the display driver chip. The working timing of a PWM signal that performs a PWM brightness adjustment is changed.

In one embodiment, the self-luminous display panel is selected from organic light emitting diode display panels, light emitting diode display panels, quantum dot light emitting diode display panels, micro light emitting diode display panels, submillimeter A flat display panel in the group consisting of a light-emitting diode display panel and a perovskite light-emitting diode display panel.

In one embodiment, the dynamic panel load calculation unit calculates the first panel load rate using the following mathematical formula:

為對應於第1條所述閘極線被驅動的一第一子負載率，

為對應於第2條所述閘極線被驅動的一第二子負載率，

為對應於第M條所述閘極線被驅動的一第M子負載率，

為耦接第1條所述閘極線之所述畫素的所述發光次數、

為耦接第2條所述閘極線之所述畫素的所述發光次數、且

為耦接第M條所述閘極線之所述畫素的所述發光次數。 Wherein, PL is the equivalent panel load factor,

for a first subload rate corresponding to the first said gate line being driven,

for a second subload rate corresponding to the second said gate line being driven,

is an Mth subload rate corresponding to the Mth gate line being driven,

is the number of light-emitting times of the pixel coupled to the first gate line,

is the number of light-emitting times of the pixel coupled to the second gate line, and

is the number of light-emitting times of the pixel coupled to the Mth gate line.

Further, the present invention also provides an information processing device, which is characterized by having the flat-panel display device of the present invention as mentioned above. In a feasible embodiment, the information processing device is selected from smart TVs, smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, access control devices, and fingerprint punching devices , and an electronic device in the group consisting of electronic door locks.

In order to enable your examiners to further understand the structure, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred specific embodiments are hereby attached.

FIG. 8 shows a block diagram of a flat display device applying a pixel compensation method of a self-luminous display panel of the present invention. As shown in FIG. 8 , the flat display device 1 mainly includes: a self-luminous display panel 11, at least one display driver chip 12 and a driving voltage supply chip 13, wherein the self-luminous display panel 11 has M gate lines, N Source lines and a plurality of pixels, wherein M and N are both positive integers. In a feasible embodiment, the self-luminous display panel 11 may be an organic light emitting diode (OLED) display panel, a light emitting diode (LED) display panel, a quantum dot light emitting diode (QD-LED) display panel, A micro light emitting diode (Min LED) display panel, a submillimeter light emitting diode (Micro LED) display panel, or a perovskite light emitting diode (Perovskite LED) display panel.

Continue referring to FIG. 9 , which shows a flowchart of a pixel compensation method for a self-luminous display panel of the present invention. As shown in FIG. 8 and FIG. 9, the pixel compensation method of the self-luminous display panel of the present invention is implemented by a display driver chip 12 to perform a voltage drop compensation operation (or IRC compensation) on a self-luminous display panel 11. operate). First, the method flow is to execute step S1: receiving an input display data. Next, the method flow is to execute step S2: when the PWM brightness control mode is enabled, a dynamic panel load calculation unit 122 is used to calculate an equivalent panel load factor of the self-luminous display panel 11 .

………………(1) FIG. 10 is a block diagram of the voltage drop compensation unit shown in FIG. 8 . According to the design of the present invention, the dynamic panel load calculation unit 122 has a look-up table of lighting times, and the look-up table of lighting times stores a plurality of lighting times. In more detail, each gate line is coupled to multiple pixels laterally, so the M gate lines can be regarded as M display blocks. Further, the M line addresses corresponding to the M gate lines and the plurality of light-emitting times can be plotted into a light-emitting number curve (as shown in FIG. 6 ). In other words, the look-up table of lighting times has M lighting times corresponding to the M gate lines of the self-luminous display panel 11 . According to this design, when the display driver chip 12 utilizes a PWM signal having at least one active width W _PWM (or pulse width) to perform PWM brightness control (Brightness control, BC) on the self-luminous display panel 11, the dynamic panel The load calculation unit 122 can use the following mathematical formula (1) to calculate the equivalent panel load rate:

………………(1)

為對應於第1條所述閘極線被驅動的一第一子負載率，

為對應於第2條所述閘極線被驅動的一第二子負載率，

為對應於第M條所述閘極線被驅動的一第M子負載率，

為耦接第1條所述閘極線之所述畫素的所述發光次數、

為耦接第2條所述閘極線之所述畫素的所述發光次數、且

為耦接第M條所述閘極線之所述畫素的所述發光次數。 In the foregoing mathematical formula (1), PL is the load factor of the first panel,

for a first subload rate corresponding to the first said gate line being driven,

for a second subload rate corresponding to the second said gate line being driven,

is an Mth subload rate corresponding to the Mth gate line being driven,

is the number of light-emitting times of the pixel coupled to the first gate line,

is the number of light-emitting times of the pixel coupled to the second gate line, and

is the number of light-emitting times of the pixel coupled to the Mth gate line.

……………(2) FIG. 11 is a front view of the self-luminous display panel 11 shown in FIG. 8 . When the display driver chip 12 performs PWM brightness control (Brightness control, BC) on the self-luminous display panel 11 with a PWM signal having an active width W _PWM (or pulse width), each gate line will Drives a plurality of pixels coupled to it. Therefore, M sub-load ratios can be calculated according to the M gate lines of the self-luminous display panel 11 . Each of the sub-load ratios (L ₁ , L ₂ , ..., L _M ) can be calculated using the following mathematical formula (2):

……………(2)

In the aforementioned mathematical formula (2), m=1, 2,..., or M, and Rdata, Gdata, and Bdata respectively represent the gray scale of the input red sub-pixel, the gray scale of the input green sub-pixel, and the input green sub-pixel Grayscale, g represents the gamma value, and Rratio, Gratio, and Bratio respectively represent the current ratio of the red sub-pixel, the current ratio of the green sub-pixel, and the current ratio of the blue sub-pixel in a pixel . For example, the gamma value ranges from 1.8 to 2.5.

In this way, the numerical values of L ₁ , L ₂ , ..., L _M are calculated by using the above mathematical formula (2), and the numerical values of E ₁ , E ₂ , ..., E _M are obtained by looking up the light-emitting times lookup table. Afterwards, the equivalent panel load rate can be calculated by bringing the values of M sub-load rates and M light-emitting times into the above formula (1). For example, in FIG. 11 , the multiple sub-load ratios corresponding to multiple gate lines are respectively: 205, 194, 182, 176, 163, 169, 141, 137, and the highest number of light-emitting times is 10.

It should be understood that in step S1, the dynamic panel load calculation unit 122 is based on the PWM signal with an active width W _PWM (or pulse width) shown in FIG. Each display block (that is, multiple pixels coupled to each gate line is regarded as a display block) is subjected to a weighted average operation of the panel load rate, so as to obtain an equivalent panel load rate. The equivalent panel load rate can reflect the real load status of each display block of the self-luminous display panel 11 operating in the PWM brightness control mode. Therefore, in step S3, the voltage drop compensation unit 121 shown in FIG. 8 and FIG. The transmitted display data determines an output display data (or called compensation display data).

Electronic engineers who are familiar with PWM brightness control technology should know that the PWM signal shown in Figure 3 is conventionally called a single-pulse PWM signal (1-pulse PWM). However, when the PWM signal is used to control the PWM brightness of the self-luminous display panel 11 , it is not limited to using the single-pulse PWM signal as shown in FIG. 3 . In a feasible embodiment, a two-pulse PWM signal (2-pulse PWM) can also be used to realize the PWM brightness control of the self-luminous display panel 11 . FIG. 12 shows a working timing diagram of a double-pulse PWM signal, and FIG. 13 is a working timing diagram of another double-pulse PWM signal.

Further, FIG. 14 shows a graph of a lighting number, and FIG. 15 shows a graph of another lighting number. To explain in more detail, if the brightness of the self-luminous display panel 11 is regulated by using the double-pulse PWM signal as shown in FIG. 12 , the light-emitting number curve as shown in FIG. On the other hand, if the brightness of the self-luminous display panel 11 is regulated by using the double-pulse PWM signal as shown in FIG. 13 , the light-emitting frequency curve as shown in FIG. 15 can be measured. In other words, when the display driver chip 12 utilizes a PWM signal to perform PWM brightness control on the self-luminous display panel 11, the PWM signal may be a single-pulse PWM signal as shown in FIG. 3 or a PWM signal as shown in FIG. Double-pulse PWM signal or double-pulse PWM signal as shown in Figure 13.

Therefore, it can be understood that the lighting times look-up table of the dynamic panel load calculation unit 122 stores the lighting times graphs corresponding to the PWM signals in different modes. According to this design, regardless of whether the display driver chip 12 uses a single-pulse PWM signal or a double-pulse PWM signal to control the PWM brightness of the self-luminous display panel 11, the dynamic panel load calculation unit 122 can be used in the table look-up mode. Find out the M number of light-emitting times corresponding to the M gate-level lines from the light-emitting times look-up table, so as to apply them to the calculation of the equivalent panel load rate.

……………(3) It should be added that the prior art uses the following mathematical formula (3) to calculate the load rate of the panel:

……………(3)

In the aforementioned mathematical formula (3), OPR is the load rate of the panel, Rdata, Gdata and Bdata respectively represent the gray scale of the input red sub-pixel, the gray scale of the input green sub-pixel and the gray scale of the input green sub-pixel, g Expressed as a gamma value, W×H is the panel resolution, and Rratio, Gratio, and Bratio respectively represent the current ratio of the red sub-pixel, the current ratio of the green sub-pixel, and the current ratio of the blue sub-pixel in a pixel. current ratio. For example, the gamma value ranges from 1.8 to 2.5, and the panel resolution is 2436×1125 (ie, a 5.8-inch screen).

It is worth noting that when the duty cycle (Duty) of the PWM signal is 100%, the equivalent panel load rate calculated by using the formula (1) will be different from the panel load calculated by the formula (3). same rate. In other words, in the case of using the dynamic panel load calculation unit 122 of the present invention, there is no need to use the conventional voltage drop compensation unit 121a (as shown in FIGS. 1 and 2 ).

It is supplemented that, as shown in FIG. 8 and FIG. 10 , the voltage drop compensation unit 121 has a three-dimensional look-up table 1211, wherein the three-dimensional look-up table 1211 is generated by using the following steps: (a) in the self-luminous display panel 11 The operation is to record a plurality of display data, a plurality of luminances corresponding to the plurality of display data, and a plurality of panel load ratios corresponding to the plurality of display data under different panel load states; and (b) in the preceding steps The obtained plurality of display data, plurality of brightness and plurality of panel loading ratios are compiled into the three-dimensional look-up table 1211 .

When step S3 is executed, the voltage drop compensation unit 121 will limit the brightness of the light-emitting display panel 11 to a maximum brightness value according to the brightness setting value (ie, DBV) set by the user. To illustrate in more detail, when a target brightness corresponding to the input display data is lower than a brightness setting value set by the user, the voltage drop compensation unit 121 directly outputs the input display data as the output display data. Conversely, if the target brightness is greater than the brightness setting value set by the user, the voltage drop compensation unit 121 finds a display data corresponding to the brightness setting value from the three-dimensional lookup table 1211 and outputs it as the output display data. Finally, as shown in FIG. 8 and FIG. 9 , the method flow executes step S4 : the display driver chip 12 drives the self-luminous display panel 11 to display images according to the output display data.

In this way, the above has completely and clearly described a pixel compensation method for a self-luminous display panel of the present invention; and, through the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses a pixel drop compensation method for a self-luminous display panel, which is implemented by a display driver chip, and is used to provide the most appropriate brightness for a self-luminous display panel operating in a PWM brightness control mode or other brightness control modes. ICR compensation.

(2) The method of the present invention is to perform a panel load factor weighted average calculation on a plurality of display areas of the self-luminous display panel according to a plurality of gate lines of the self-luminous display panel, thereby obtaining the equivalent panel load factor. The equivalent panel load rate can reflect the real load status of each display block of the self-luminous display panel operating in the PWM brightness control mode, so that the voltage drop compensation unit can be based on the equivalent panel load rate and the DBV set by the user. Value, and a display data transmitted by the host computer to determine the best compensation display data.

(3) When the duty cycle (Duty) of the PWM signal is 100%, the panel load rate calculated by the method of the present invention will be the same as that calculated by the prior art. Therefore, in the case of using the pixel compensation method of the present invention, there is no need to use the conventional IRC compensation algorithm.

(4) The present invention simultaneously provides a flat display device, which includes a self-luminous display panel and at least one display driver chip, wherein the display driver chip executes the pixel of the self-luminous display panel of the present invention as described above A drop compensation method, so as to realize an IRC compensation operation for the self-luminous display panel. In a feasible embodiment, the self-luminous display panel is selected from organic light-emitting diode display panels, light-emitting diode display panels, quantum dot light-emitting diode display panels, micro light-emitting diode display panels, submillimeter A flat display panel in the group consisting of a light-emitting diode display panel and a perovskite light-emitting diode display panel.

(5) The present invention also provides an information processing device, which is characterized in that it has the flat-panel display of the present invention as described above. In a feasible embodiment, the information processing device is selected from smart TVs, smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, access control devices, and fingerprint punching devices , and an electronic device in the group consisting of electronic door locks.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment, and all partial changes or modifications derived from the technical ideas of this case and easily deduced by those familiar with the technology are all inseparable from the patent of this case. category of rights.

To sum up, the purpose, means and efficacy of this case all show that it is very different from the conventional technology, and its first invention is practical, and indeed meets the patent requirements of the invention. I implore your review committee to be aware and grant a patent as soon as possible to benefit you. Society is for the Most Prayer.

1a: OLED display device 11a: OLED display panel 12a: Display drive circuit 121a: voltage drop compensation unit 13a: Driving voltage supply circuit 1: flat panel display device 11: Self-luminous display panel 12: Display driver chip 121: Voltage drop compensation unit 1211: Three-dimensional lookup table 122: Dynamic panel load calculation unit 13: Driving voltage supply chip S1: Receive an input display data S2: Using a dynamic panel load calculation unit to calculate an equivalent panel load rate of the self-luminous display panel S3: Using a voltage drop compensation unit to determine an output display data according to the equivalent panel load ratio, a brightness setting value and the input display data S4: Drive the self-luminous display panel to display images according to the output display data

1 is a block diagram of a known OLED display device; Fig. 2 is a block diagram of the voltage drop compensation unit shown in Fig. 1; Fig. 3 is a working timing diagram of a PWM signal; FIG. 4 is a front view of the OLED display panel shown in FIG. 1; FIG. 5A, FIG. 5B and FIG. 5C are front views of OLED display panels for PWM brightness control; Fig. 6 is a graph of the number of times of light emission; Fig. 7 is a graph of another number of light-emitting times; 8 is a block diagram of a flat display device applying a pixel compensation method for a self-luminous display panel of the present invention; 9 is a flowchart of a pixel compensation method for a self-luminous display panel of the present invention; FIG. 10 is a block diagram of the voltage drop compensation unit shown in FIG. 8; FIG. 11 is a front view of the self-luminous display panel shown in FIG. 8; Fig. 12 is a working sequence diagram of a PWM signal of a double pulse; FIG. 13 is a working timing diagram of another double-pulse PWM signal; Figure 14 is a graph of the number of times of light emission; and Fig. 15 is a graph of another number of light emission.

S1: Receive an input display data

S2: Using a dynamic panel load calculation unit to calculate an equivalent panel load rate of the self-luminous display panel

S3: Using a voltage drop compensation unit to determine an output display data according to the equivalent panel load ratio, a brightness setting value and the input display data

S4: Drive the self-luminous display panel to display images according to the output display data

Claims (8)

A pixel compensation method for a self-luminous display panel, which is executed by a display driver chip, to realize a voltage drop compensation operation for a self-luminous display panel, and includes the following steps: receiving an input display data; using a dynamic The panel load calculation unit calculates an equivalent panel load rate of the self-luminous display panel; uses a voltage drop compensation unit to determine an output display data according to the equivalent panel load rate, a brightness setting value and the input display data; and The output display data drives the self-luminous display panel to display images; wherein, the dynamic panel load calculation unit uses the following mathematical formula to calculate the first panel load rate:

Wherein, PL is the equivalent panel load rate, L ₁ is a first sub-load rate corresponding to the first gate line being driven, L ₂ is the driving rate corresponding to the second gate line A second sub-load ratio, L _M is an Mth sub-load ratio corresponding to the Mth gate line being driven, E ₁ is the pixel coupled to the first gate line The number of times of light emission, E2 is the number of times of light emission of the pixel coupled to the second gate line, and E _{M is} the number of times of the pixel coupled to the Mth gate line The number of times of light emission. The pixel compensation method for a self-luminous display panel as described in Claim 1, wherein the dynamic panel load calculation unit has a light-emitting count lookup table, and the light-emitting count look-up table stores a plurality of light-emitting counts. The pixel compensation method of the self-luminous display panel as described in Claim 2, wherein the multiple gate lines of the self-luminous display panel and the plurality of said light-emitting times form a light-emitting number curve, and the light-emitting number curve follows The operating time sequence of a PWM signal used by the display driver chip for a PWM brightness adjustment of the self-luminous display panel is changed. A flat display device, comprising a self-luminous display panel and at least one display driver chip, characterized in that the display driver chip implements a voltage drop compensation method for the self-luminous display panel, thereby realizing a voltage for the self-luminous display panel Drop compensation operation; the pixel compensation method of the self-luminous display panel, and includes the following steps: receiving an input display data; using a dynamic panel load calculation unit to calculate an equivalent panel load rate of the self-luminous display panel; using a The voltage drop compensation unit determines an output display data according to the equivalent panel load rate, a brightness setting value and the input display data; and drives the self-luminous display panel to display images according to the output display data; wherein, the dynamic The panel load calculation unit calculates the first panel load rate using the following mathematical formula:

Wherein, PL is the equivalent panel load rate, L ₁ is a first sub-load rate corresponding to the first gate line being driven, L ₂ is the driving rate corresponding to the second gate line A second sub-load ratio, L _M is an Mth sub-load ratio corresponding to the Mth gate line being driven, E ₁ is the pixel coupled to the first gate line The number of times of light emission, E2 is the number of times of light emission of the pixel coupled to the second gate line, and E _{M is} the number of times of the pixel coupled to the Mth gate line The number of times of light emission. The flat-panel display device according to claim 4, wherein the dynamic panel load calculation unit has a look-up table of light-emitting times, and the look-up table of light-emitting times stores a plurality of light-emitting times. The planar display device as described in Claim 5, wherein, the M gate lines of the self-luminous display panel and the plurality of said light-emitting times form a light-emitting number curve, and the light-emitting number curve is used for the display driver chip. It is changed according to the working timing of a PWM signal for performing a PWM brightness control on the self-luminous display panel. An information processing device, characterized by having a flat-panel display device as described in any one of Claim 4 to Claim 6. The information processing device as described in claim 7, wherein the information processing device is selected from smart TVs, smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, access control An electronic device in the group consisting of a fingerprint device, a fingerprint punching device, and an electronic door lock.

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