CN-122024638-A - Display driving integrated circuit, display module, electronic equipment and driving method thereof

Abstract

The embodiment of the application provides a display driving integrated circuit, a display module, electronic equipment and a driving method thereof, relates to the technical field of electronics, and is used for improving the display effect of a display panel, in particular to the display effect under high brightness. In the electronic device, the display driving integrated circuit can realize that the image signal is reduced and the absolute value of the output electrode voltage is also reduced under the condition that the brightness signal is unchanged. And no longer outputs the electrode voltage with the largest absolute value for any image signal, as in a conventional display driving integrated circuit. That is, it is possible to drive the display panel to display a low gray-scale screen with a low electrode voltage while ensuring that the screen brightness is unchanged. To reduce the power consumption of the light emitting device and thus the power consumption of the electronic device. Then, the heating and temperature rise of the electronic equipment can be slowed down, the opening of the temperature control switch is delayed, the duration that the electronic equipment is kept in the comfortable range of eyes of people is prolonged, and the display effect is improved.

Inventors

• ZHAN YIFAN
• ZHANG LI
• CHEN JIANQIU
• ZHANG LILIANG
• HE XIANG
• JIANG CONGBIAO

Assignees

• 华为技术有限公司

Dates

Publication Date

20260512

Application Date

20251028

Claims (20)

1. 1. The display module is characterized by comprising a display driving integrated circuit and a display panel; The display driving integrated circuit is used for receiving a first brightness signal and a first image signal, sending a first cathode power supply voltage to the cathode of a light emitting device of the display panel according to the first brightness signal and the first image signal, and sending a first anode initialization voltage to the anode of the light emitting device; the display panel is used for responding to the first cathode power supply voltage and the first anode initialization voltage to drive and display a first picture; the display driving integrated circuit is also used for receiving a first brightness signal and a second image signal, sending a second cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the second image signal, and sending a second anode initialization voltage to the anode of the light emitting device; The display panel is used for responding to the second cathode power supply voltage and the second anode initialization voltage to drive and display a second picture; The equivalent average gray level information of the second image signal is smaller than the equivalent average gray level information of the first image signal, the absolute value of the second cathode power supply voltage is smaller than the absolute value of the first cathode power supply voltage, and the absolute value of the second anode initialization voltage is smaller than the absolute value of the first anode initialization voltage.
2. 2. The display module assembly of claim 1, wherein the display module assembly comprises, The display driving integrated circuit is further used for receiving a first brightness signal and a third image signal, sending a third cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the third image signal, and sending a third anode initialization voltage to the anode of the light emitting device; The display panel is used for responding to the third cathode power supply voltage and the third anode initialization voltage to drive and display a third picture; the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the third cathode power supply voltage is larger than the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the first anode initialization voltage and the absolute value of the third anode initialization voltage is larger than the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage.
3. 3. The display module assembly of claim 1 or 2, wherein, The display driving integrated circuit is also used for receiving a first brightness signal and a third image signal, sending a third cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the third image signal, and sending a third anode initialization voltage to the anode of the light emitting device; the display driving integrated circuit is also used for receiving a first brightness signal and a fourth image signal, sending a fourth cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the fourth image signal, and sending a fourth anode initialization voltage to the anode of the light emitting device; The equivalent average gray level information of the third image signal and the equivalent average gray level information of the fourth image signal are smaller than a set value, the third cathode power supply voltage is equal to the fourth cathode power supply voltage, and the third anode initialization voltage is equal to the fourth anode initialization voltage.
4. 4. A display module according to any one of claims 1-3, wherein the display driver integrated circuit is further configured to: continuously receiving a plurality of groups of first brightness signals and fifth image signals, and sequentially outputting a plurality of groups of fifth cathode power supply voltages and fifth anode initialization voltages to the light emitting device according to the plurality of groups of first brightness signals and the fifth image signals; The absolute value of the fifth cathode power supply voltage which is sequentially output and the absolute value of the fifth anode initialization voltage which is sequentially output are gradually reduced, or are gradually reduced and then kept unchanged; The display panel is used for responding to a plurality of groups of fifth cathode power supply voltages and fifth anode initialization voltages to drive and display a plurality of fifth pictures, and the brightness of the plurality of fifth pictures is the same.
5. 5. The display module assembly of any one of claims 1-4, wherein, The display driving integrated circuit is further used for receiving a second brightness signal and a first image signal, sending a sixth cathode power supply voltage to the cathode of the light emitting device according to the second brightness signal and the first image signal, and sending a sixth anode initialization voltage to the anode of the light emitting device; The display panel is used for responding to the sixth cathode power supply voltage and the sixth anode initialization voltage to drive and display a sixth picture; The display driving integrated circuit is further used for receiving a second brightness signal and a second image signal, sending a seventh cathode power supply voltage to the cathode of the light emitting device according to the second brightness signal and the second image signal, and sending a seventh anode initialization voltage to the anode of the light emitting device; the display panel is used for responding to the seventh cathode power supply voltage and the seventh anode initialization voltage to drive and display a seventh picture, and the brightness of the sixth picture is larger than that of the first picture; The difference value of the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is smaller than the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is smaller than the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage; Or alternatively The difference value of the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is larger than the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is larger than the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage; Or alternatively The brightness of the sixth picture and the brightness of the first picture are both larger than a first set brightness and smaller than a second set brightness, the difference between the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is equal to the difference between the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference between the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is equal to the difference between the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage.
6. 6. The display module assembly of any one of claims 1-5, wherein, The display driving integrated circuit is also used for receiving a first enabling signal, sending a second cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the second image signal, and sending a second anode initialization voltage to the anode of the light emitting device, wherein the display driving integrated circuit is used for sending the second cathode power supply voltage to the cathode of the light emitting device according to the first enabling signal, the first brightness signal and the second image signal and sending the second anode initialization voltage to the anode of the light emitting device; The display driving integrated circuit is further configured to receive a second enable signal, a first luminance signal, and a second image signal, send the first cathode power supply voltage to the cathode of the light emitting device according to the second enable signal, the first luminance signal, and the second image signal, and send the first anode initialization voltage to the anode of the light emitting device; The display panel is used for responding to the first cathode power supply voltage and the first anode initialization voltage to drive and display an eighth picture, and the brightness of the eighth picture is the same as that of the second picture.
7. 7. The display module assembly of claim 6, wherein the display module assembly comprises, The display driving integrated circuit is also used for sending a first data voltage to the display panel, and the display panel is also used for responding to the first data voltage to drive and display the second picture; The display driving integrated circuit is also used for sending a second data voltage to the display panel, and the display panel is also used for responding to the second data voltage to drive and display the eighth picture; The first data voltage is different from the second data voltage.
8. 8. The display module of any one of claims 1-7, wherein a difference between an absolute value of the first cathode supply voltage and an absolute value of the second cathode supply voltage is equal to a difference between an absolute value of the first anode initialization voltage and an absolute value of the second anode initialization voltage.
9. 9. The driving method of the electronic equipment is characterized in that the electronic equipment comprises a driving controller, a display driving integrated circuit and a display panel; The driving controller transmits a first luminance signal and a first image signal to the display driving integrated circuit; The display driving integrated circuit sends a first cathode power supply voltage to a cathode of a light emitting device in the display panel according to the first brightness signal and the first image signal, and sends a first anode initialization voltage to an anode of the light emitting device; The display panel responds to the first cathode power supply voltage and the first anode initialization voltage to drive and display the first picture; the drive controller also transmits a first luminance signal and a second image signal to the display drive integrated circuit; the display driving integrated circuit sends a second cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the second image signal, and sends a second anode initialization voltage to the anode of the light emitting device; The display panel responds to the second cathode power supply voltage and the second anode initialization voltage to drive and display the second picture; The equivalent average gray level information of the second image signal is smaller than the equivalent average gray level information of the first image signal, the absolute value of the second cathode power supply voltage is smaller than the absolute value of the first cathode power supply voltage, and the absolute value of the second anode initialization voltage is smaller than the absolute value of the first anode initialization voltage.
10. 10. The driving method according to claim 9, characterized in that the driving method further comprises: the driving controller transmits a first luminance signal and a third image signal to the display driving integrated circuit; The display driving integrated circuit sends a third cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the third image signal, and sends a third anode initialization voltage to the anode of the light emitting device; the display panel responds to the third cathode power supply voltage and the third anode initialization voltage to drive and display the third picture; The equivalent average gray level information of the third image signal is smaller than the equivalent average gray level information of the second image signal, the absolute difference value of the first cathode power supply voltage and the third cathode power supply voltage is larger than the absolute difference value of the first cathode power supply voltage and the absolute difference value of the second cathode power supply voltage, and the absolute difference value of the first anode initialization voltage and the absolute difference value of the third anode initialization voltage is larger than the absolute difference value of the first anode initialization voltage and the absolute difference value of the second anode initialization voltage.
11. 11. The driving method according to claim 9 or 10, characterized in that the driving method further comprises: the driving controller transmits a first luminance signal and a third image signal to the display driving integrated circuit; The display driving integrated circuit sends a third cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the third image signal, and sends a third anode initialization voltage to the anode of the light emitting device; the display panel responds to the third cathode power supply voltage and the third anode initialization voltage to drive and display the third picture; the driving controller transmits a first luminance signal and a fourth image signal to the display driving integrated circuit; The display driving integrated circuit transmits a fourth cathode power supply voltage to the cathode of the light emitting device according to the first brightness signal and the fourth image signal, and transmits a fourth anode initialization voltage to the anode of the light emitting device; The display panel responds to the fourth cathode power supply voltage and the fourth anode initialization voltage to drive and display the fourth picture; The equivalent average gray level information of the third image signal and the equivalent average gray level information of the fourth image signal are smaller than a set value, the third cathode power supply voltage is equal to the fourth cathode power supply voltage, and the third anode initialization voltage is equal to the fourth anode initialization voltage.
12. 12. The driving method according to any one of claims 9 to 11, characterized in that the driving method further comprises: the driving controller continuously transmits a plurality of groups of the first luminance signal and the fifth image signal to the display driving integrated circuit; The display driving integrated circuit sequentially outputs a plurality of groups of fifth cathode power supply voltages and fifth anode initialization voltages to the light emitting device according to a plurality of groups of the first brightness signals and the fifth image signals; The absolute value of the fifth cathode power supply voltage which is sequentially output and the absolute value of the fifth anode initialization voltage which is sequentially output are gradually reduced, or are gradually reduced and then kept unchanged; The display panel responds to a plurality of groups of fifth cathode power supply voltage and the fifth anode initialization voltage to drive and display a plurality of fifth pictures, and the brightness of the plurality of fifth pictures is the same.
13. 13. The driving method according to any one of claims 9 to 12, characterized in that the driving method further comprises: the drive controller transmits a second luminance signal and a first image signal to the display drive integrated circuit; The display driving integrated circuit transmits a sixth cathode power supply voltage to the cathode of the light emitting device according to the second brightness signal and the first image signal, and transmits a sixth anode initialization voltage to the anode of the light emitting device; The display panel is responsive to the sixth cathode power supply voltage and the sixth anode initialization voltage to drive and display the sixth picture; The drive controller transmits a second luminance signal and a second image signal to the display drive integrated circuit; The display driving integrated circuit transmits a seventh cathode power supply voltage to the cathode of the light emitting device according to the second brightness signal and the second image signal, and transmits a seventh anode initialization voltage to the anode of the light emitting device; The display panel responds to the seventh cathode power supply voltage and the seventh anode initialization voltage to drive and display the seventh picture, wherein the brightness of the sixth picture is larger than that of the first picture; The difference value of the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is smaller than the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is smaller than the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage; Or alternatively The difference value of the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is larger than the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is larger than the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage; Or alternatively The brightness of the sixth picture and the brightness of the first picture are both larger than a first set brightness and smaller than a second set brightness, the difference value of the absolute value of the sixth cathode power supply voltage and the absolute value of the seventh cathode power supply voltage is equal to the difference value of the absolute value of the first cathode power supply voltage and the absolute value of the second cathode power supply voltage, and the difference value of the absolute value of the sixth anode initialization voltage and the absolute value of the seventh anode initialization voltage is equal to the difference value of the absolute value of the first anode initialization voltage and the absolute value of the second anode initialization voltage.
14. 14. The driving method according to any one of claims 9 to 13, characterized in that the driving method further comprises: The display driving integrated circuit sends the second cathode power supply voltage to the cathode of the light emitting device according to the first enabling signal, the first brightness signal and the second image signal, and sends the second anode initialization voltage to the anode of the light emitting device; The display driving integrated circuit sends the first cathode power supply voltage to the cathode of the light emitting device and sends the first anode initialization voltage to the anode of the light emitting device according to the second enabling signal, the first brightness signal and the second image signal; The display panel responds to the first cathode power supply voltage and the first anode initialization voltage to drive and display the eighth picture, and the brightness of the eighth picture is the same as that of the second picture.
15. 15. The driving method according to claim 14, characterized in that the driving method further comprises: the display driving integrated circuit sends the first data voltage to the display panel, and the display panel also responds to the first data voltage to drive and display the second picture; The display driving integrated circuit sends the second data voltage to the display panel, and the display panel responds to the second data voltage to drive and display the eighth picture; The first data voltage is different from the second data voltage.
16. 16. A display driving integrated circuit for outputting an electrode voltage to an electrode of a light emitting device in a display panel; the display driving integrated circuit includes: A first circuit for receiving a first luminance signal and a first image signal, and outputting a first electrode voltage according to the first luminance signal and the first image signal; A first compensation circuit for receiving the first luminance signal and the second image signal and outputting a first compensation voltage according to the first luminance signal and the second image signal; The first circuit is further configured to receive the first compensation voltage, the first luminance signal, and the second image signal, and output a second electrode voltage according to the first compensation voltage, the first luminance signal, and the second image signal; The equivalent average gray level information of the second image signal is smaller than that of the first image signal, and the absolute value of the second electrode voltage is smaller than that of the first electrode voltage.
17. 17. The display driver integrated circuit of claim 16, wherein the display driver integrated circuit comprises, The first compensation circuit is also used for receiving a first brightness signal and a third image signal, and outputting a second compensation voltage according to the first brightness signal and the third image signal; the first circuit is further configured to receive the second compensation voltage, the first luminance signal, and the third image signal, and output a third electrode voltage according to the second compensation voltage, the first luminance signal, and the third image signal; The difference value between the absolute value of the first electrode voltage and the absolute value of the third electrode voltage is larger than the difference value between the absolute value of the first electrode voltage and the absolute value of the second electrode voltage.
18. 18. The display driver integrated circuit of claim 16 or 17, wherein, The first compensation circuit is also used for receiving a first brightness signal and a third image signal, and outputting a second compensation voltage according to the first brightness signal and the third image signal; the first circuit is further configured to receive the second compensation voltage, the first luminance signal, and the third image signal, and output a third electrode voltage according to the second compensation voltage, the first luminance signal, and the third image signal; The first compensation circuit is also used for receiving a first brightness signal and a fourth image signal, and outputting a third compensation voltage according to the first brightness signal and the fourth image signal; The first circuit is further configured to receive the third compensation voltage, the first luminance signal, and the fourth image signal, and output a fourth electrode voltage according to the third compensation voltage, the first luminance signal, and the fourth image signal; the equivalent average gray level information of the third image signal and the equivalent average gray level information of the fourth image signal are smaller than a set value, and the third electrode voltage is equal to the fourth electrode voltage.
19. 19. The display driver integrated circuit of any of claims 16-18, wherein, The first compensation circuit is further configured to continuously receive a plurality of groups of the first luminance signal and the fifth image signal, and sequentially output a plurality of fourth compensation voltages according to the plurality of groups of the first luminance signal and the fifth image signal; the first circuit is further configured to receive the fourth compensation voltage, the first luminance signal, and the second image signal in a divided manner, and output a fifth electrode voltage according to the fourth compensation voltage, the first luminance signal, and the second image signal received each time; The absolute values of the voltages of the fifth electrodes sequentially output are gradually reduced, or are gradually reduced and then are kept unchanged.
20. 20. The display driver integrated circuit of any of claims 16-19, wherein, The first circuit is further configured to receive the second luminance signal and the first image signal, and output a sixth electrode voltage according to the second luminance signal and the first image signal; The first compensation circuit is also used for receiving a second brightness signal and the second image signal, and outputting a fifth compensation voltage according to the second brightness signal and the second image signal, wherein the brightness represented by the second brightness signal is larger than the brightness represented by the first brightness signal; The first circuit is further configured to receive the fifth compensation voltage, the second luminance signal, and the second image signal, and output a seventh electrode voltage according to the fifth compensation voltage, the second luminance signal, and the second image signal, wherein the luminance represented by the first luminance signal and the luminance represented by the second luminance signal are both greater than a first set luminance, and a difference between an absolute value of the sixth electrode voltage and an absolute value of the seventh electrode voltage is smaller than a difference between an absolute value of the first electrode voltage and an absolute value of the second electrode voltage; Or alternatively The brightness represented by the first brightness signal and the brightness represented by the second brightness signal are smaller than a second set brightness, and the difference value between the absolute value of the sixth electrode voltage and the absolute value of the seventh electrode voltage is larger than the difference value between the absolute value of the first electrode voltage and the absolute value of the second electrode voltage; Or alternatively The brightness represented by the first brightness signal and the brightness represented by the second brightness signal are both larger than a first set brightness and smaller than a second set brightness, and the difference value between the absolute value of the sixth electrode voltage and the absolute value of the seventh electrode voltage is equal to the difference value between the absolute value of the first electrode voltage and the absolute value of the second electrode voltage.

Description

Display driving integrated circuit, display module, electronic equipment and driving method thereof Technical Field The present application relates to the field of electronic technologies, and in particular, to a display driving integrated circuit, a display module, an electronic device, and a driving method thereof. Background With the continuous progress of technology, intelligent electronic devices have become an integral part of people's life. Self-luminous display panels such as Organic LIGHT EMITTING Diode (OLED) display panels have been widely used in electronic devices because of their advantages of thin, light weight, wide viewing angle, active light emission, continuous and adjustable emission color, low cost, high color gamut, high contrast, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high luminous efficiency, flexible display, etc. Although the peak brightness of the display panel is continuously improved with the iteration of the display technology, the problem of pain caused by the fact that the content of the display panel is not clearly seen in a high-brightness scene such as sunlight is still displayed. Disclosure of Invention The application provides a display driving integrated circuit, a display module, electronic equipment and a driving method thereof, which are used for improving the display effect of a display panel, in particular to the display effect under high brightness. In a first aspect of the embodiments of the present application, a display module is provided, where the display module includes a display driving integrated circuit and a display panel. The display driving integrated circuit is used for receiving the first brightness signal and the first image signal, sending a first cathode power supply voltage to the cathode of the light emitting device of the display panel according to the first brightness signal and the first image signal, and sending a first anode initialization voltage to the anode of the light emitting device. The display panel is used for responding to the first cathode power supply voltage and the first anode initialization voltage to drive and display a first picture. The display driving integrated circuit is further configured to receive the first luminance signal and the second image signal, transmit a second cathode power supply voltage to the cathode of the light emitting device according to the first luminance signal and the second image signal, and transmit a second anode initialization voltage to the anode of the light emitting device. The display panel is used for responding to the second cathode power supply voltage and the second anode initialization voltage to drive and display a second picture. The equivalent average gray level information of the second image signal is smaller than the equivalent average gray level information of the first image signal, for example, the average gray level represented by the first image signal is 255 gray levels, and the average gray level represented by the second image signal is smaller than 255 gray levels. Or, for example, the average gray level of the first image signal representation and the average gray level of the second image signal representation are both less than 255 gray levels. The absolute value of the second cathode supply voltage is less than the absolute value of the first cathode supply voltage, and the absolute value of the second anode initialization voltage is less than the absolute value of the first anode initialization voltage. In the display module provided by the embodiment of the application, the display driving integrated circuit can realize that the image signal changes under the condition that the brightness signal is unchanged, and the absolute value of the output cathode power supply voltage and the absolute value of the anode reset voltage also change. That is, when the object is to drive the first luminance display screen of the display panel characterized by the first luminance signal, the display driving integrated circuit can realize the first image signal with large information for the equivalent average gray level, and output the first cathode power supply voltage and the first anode reset voltage with the largest absolute values. And outputting a second cathode power supply voltage with an absolute value smaller than the first cathode power supply voltage and outputting a second anode reset voltage with an absolute value smaller than the first anode reset voltage for the second image signal with small equivalent average gray level information. Instead of outputting the first cathode power supply voltage and the first anode reset voltage having the largest absolute values for any image signal, as in the conventional display driving integrated circuit. That is, it is possible to drive the display panel to display a low gray-scale screen with a low electrode voltage without changing the lu