Display control method of display panel, display module, and display device

1 . A display control method of a display panel, comprising the following step:

providing a plurality of cascaded emission control driving circuits to output a plurality of emission control signals according to an emission start signal;

controlling, by a plurality of pixel driving circuits, a plurality of light-emitting devices to emit light according to the plurality of emission control signals; and

transmitting a compensated emission start signal to the emission control driving circuits, wherein one frame period includes a plurality of display phases in which the light-emitting devices emit light and a plurality of non-display phases in which the light-emitting devices are turned off;

generating a compensated emission start signal by modifying pulse widths of a plurality of pulses respectively corresponding to the plurality of non-display phases, wherein the modifying adjusts emission durations of the display phases within the one frame period and is performed according to pulse-width compensation values respectively corresponding to the plurality of non-display phases and determined to offset a luminance variation occurring within the one frame period due to electrical leakage of the pixel driving circuits during the non-display phases; and

transmitting the compensated emission start signal to the cascaded emission control driving circuits so that emission durations of the display phases are adjusted to offset the luminance variation,

wherein the pulse-width compensation values applied to at least some of the non-display phases within one frame period are different from one another.

2 . The display control method according to claim 1 , wherein the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period in the compensated emission start signal are at least partially different.

3 . The display control method according to claim 1 , wherein each of the first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal has a first initial pulse width;

each of the first pulses respectively corresponding to the non-display phases in one frame period in the compensated emission start signal has a second pulse width; and

the second pulse width is equal to a difference between the first initial pulse width and a corresponding one of the pulse width compensation values.

4 . The display control method according to claim 1 , wherein before the step of transmitting the compensated emission start signal to the emission control driving circuit, the display control method further comprises:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction is generated according to a brightness adjustment interval corresponding to a brightness of the display panel corresponding to the initial emission start signal or is generated by a processing chip according to an operating temperature of the display panel;

obtaining the pulse width compensation values according to the brightness adjustment instruction; and

compensating the initial emission start signal according to the pulse width compensation values.

5 . The display control method according to claim 4 , wherein the brightness of the display panel corresponding to the brightness adjustment interval is proportional to a sum of the pulse width compensation values.

6 . The display control method according to claim 4 , wherein the operating temperature is proportional to a sum of the pulse width compensation values.

7 . The display control method according to claim 1 , wherein before the step of transmitting the compensated emission start signal to the emission control driving circuit, the display control method further comprises:

receiving the pulse width compensation values, wherein the pulse width compensation values are obtained according to a brightness adjustment interval corresponding to a brightness of the display panel corresponding to the initial emission start signal or obtained by a processing chip according to an operating temperature of the display panel.

8 . A display module, comprising a display panel, wherein the display panel comprises:

a plurality of light-emitting devices;

a plurality of cascaded emission control driving circuits for outputting a plurality of emission control signals according to an emission start signal;

a plurality of pixel driving circuits electrically connected to the light-emitting devices and the emission control driving circuits, wherein the pixel driving circuits control the light-emitting devices to emit light according to the emission control signals; and

a driving chip electrically connected to a processing chip of a display device and to the emission control driving circuits, wherein the driving chip transmits the emission start signal to the emission control driving circuits,

wherein, during operation of the display panel, one frame period includes display phases in which the light-emitting devices emit light and non-display phases in which the light-emitting devices are turned off;

wherein the driving chip is configured to generate a compensated emission start signal by modifying pulse widths of a plurality of pulses respectively corresponding to the plurality of non-display phases, wherein the modifying adjusts emission durations of the display phases within the one frame period and is performed according to pulse-width compensation values respectively corresponding to the plurality of non-display phases and determined to offset a luminance variation occurring within the one frame period due to electrical leakage of the pixel driving circuits during the non-display phases;

wherein the pulse-width compensation values applied to at least some of the non-display phases within the one frame period are different from one another.

9 . The display module according to claim 8 , wherein each of the multiple first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal has a first initial pulse width;

each of the first pulses respectively corresponding to the non-display phases in one frame period in the emission start signal has a second pulse width; and

wherein the second pulse width is equal to a difference between the first initial pulse width and a corresponding one of the pulse width compensation values.

10 . The display module according to claim 9 , wherein each of the first initial pulse widths is greater than the corresponding second pulse width.

11 . The display module according to claim 8 , wherein in one frame period, the display panel has a first brightness corresponding to a first brightness adjustment interval corresponding to the initial emission start signal, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period according to multiple first pulse width compensation values; and

in another frame period, the display panel has a second brightness corresponding to a second brightness adjustment interval corresponding to the initial emission start signal, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period according to multiple second pulse width compensation values;

wherein the first brightness is greater than the second brightness, and a sum of the multiple first pulse width compensation values is greater than a sum of the multiple second pulse width compensation values.

12 . The display module according to claim 8 , wherein in one frame period, the display panel has a first operating temperature, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal according to multiple third pulse width compensation values; and

in another frame period, the display panel has a second operating temperature, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal according to multiple fourth pulse width compensation values;

wherein the first operating temperature is greater than the second operating temperature, and a sum of the third pulse width compensation values is greater than a sum of the fourth pulse width compensation values.

13 . The display module according to claim 8 , wherein each of the pixel driving circuits comprises a first transistor, a fifth transistor, and a sixth transistor; and

a source and a drain of the first transistor, a source and a drain of the fifth transistor, a source and a drain of the sixth transistor, and the corresponding light-emitting device are connected in series between a first voltage terminal and a second voltage terminal;

wherein the cascaded emission control driving circuits are electrically connected to gates of the fifth transistors and gates of the sixth transistors in the pixel driving circuits, and the gate of the fifth transistor and the gate of the sixth transistor in the same pixel driving circuit are electrically connected to the same emission control driving circuit.

14 . A display device, comprising a display module and a processing chip, wherein the display module comprises:

a display panel, wherein the display panel comprises a plurality of light-emitting devices, a plurality of cascaded emission control driving circuits, a plurality of pixel driving circuits, and a driving chip; the cascaded emission control driving circuits output a plurality of emission control signals according to an emission start signal; the pixel driving circuits are electrically connected to the light-emitting devices and the emission control driving circuits, and the pixel driving circuits control the light-emitting devices to emit light according to the emission control signals; and the driving chip is electrically connected to the processing chip and the emission control driving circuits for transmitting the emission start signal to the emission control driving circuits,

wherein, during operation of the display panel, one frame period includes display phases in which the light-emitting devices emit light and non-display phases in which the light-emitting devices are turned off;

wherein the driving chip is configured to generate a compensated emission start signal by modifying pulse widths of a plurality of pulses respectively corresponding to the plurality of non-display phases, wherein the modifying adjusts emission durations of the display phases within the one frame period and is performed according to pulse-width compensation values respectively corresponding to the plurality of non-display phases and determined to offset a luminance variation occurring within the one frame period due to electrical leakage of the pixel driving circuits during the non-display phases;

wherein the pulse-width compensation values applied to at least some of the non-display phases within the one frame period are different from one another.

15 . The display device according to claim 14 , wherein in one frame period, the display panel has a first brightness corresponding to a first brightness adjustment interval corresponding to the initial emission start signal, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period according to multiple first pulse width compensation values; and

in another frame period, the display panel has a second brightness corresponding to a second brightness adjustment interval corresponding to the initial emission start signal, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period according to multiple second pulse width compensation values;

wherein the first brightness is greater than the second brightness, and a sum of the multiple first pulse width compensation values is greater than a sum of the multiple second pulse width compensation values.

16 . The display device according to claim 14 , wherein in one frame period, the display panel has a first operating temperature, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal according to multiple third pulse width compensation values; and

in another frame period, the display panel has a second operating temperature, and the emission start signal is obtained by compensating the pulse widths of the first pulses respectively corresponding to the non-display phases in one frame period in the initial emission start signal according to multiple fourth pulse width compensation values;

wherein the first operating temperature is greater than the second operating temperature, and a sum of the third pulse width compensation values is greater than a sum of the fourth pulse width compensation values.

17 . The display device according to claim 14 , wherein each of the pixel driving circuits comprises a first transistor, a fifth transistor, and a sixth transistor; and

a source and a drain of the first transistor, a source and a drain of the fifth transistor, a source and a drain of the sixth transistor, and the corresponding light-emitting device are connected in series between a first voltage terminal and a second voltage terminal;

wherein the cascaded emission control driving circuits are electrically connected to gates of the fifth transistors and gates of the sixth transistors in the pixel driving circuits, and the gate of the fifth transistor and the gate of the sixth transistor in the same pixel driving circuit are electrically connected to the same emission control driving circuit.