CN-122024647-A - Display device

Abstract

The invention relates to the technical field of display and discloses a display device which comprises a control main board, a power supply chip, a driving chip and a display panel, wherein the power supply chip provides analog reference voltage and power supply voltage for the driving chip, basic voltage output by the driving chip comprises analog power supply voltage, a main control unit of the driving chip determines a current display mode according to a display mode control instruction sent by the control main board, a basic voltage generating unit generates the basic voltage according to the analog reference voltage and the power supply voltage, if a display picture of the current display mode comprises a plurality of black display sub-pixels, the first gamma reference voltage output to the black display sub-pixels by the basic voltage generating unit is the analog power supply voltage, and the analog power supply voltage is equal to positive integer multiple of the analog reference voltage, or equal to the sum of the positive integer multiple of the analog reference voltage and the positive integer multiple of the power supply voltage. The method and the device can effectively reduce driving power consumption and improve equipment endurance.

Inventors

• ZHANG MENGMENG
• SUN CHENGUANG

Assignees

• 武汉天马微电子有限公司上海分公司

Dates

Publication Date

20260512

Application Date

20260403

Claims (20)

1. 1. The display device is characterized by comprising a control main board, a power supply chip, a driving chip and a display panel, wherein the control main board and the power supply chip are electrically connected with the driving chip, and the driving chip is configured to drive the display panel to display pictures; the power supply chip is configured to provide an analog reference voltage and a power supply voltage to the driving chip; the control main board is configured to send a display mode control instruction to the driving chip, and the driving chip is configured to output a plurality of basic voltages, wherein the basic voltages at least comprise analog power supply voltages; the driving chip comprises a main control unit and a basic voltage generation unit, wherein the main control unit is configured to determine a current display mode according to the display mode control instruction, and the basic voltage generation unit is configured to generate the basic voltage according to the analog reference voltage and the power supply voltage; If the display picture in the current display mode comprises a black picture, the display panel area corresponding to the black picture comprises a plurality of black display sub-pixels, and the basic voltage generating unit is configured to output a first gamma reference voltage to the black display sub-pixels as the analog power supply voltage; Wherein the analog supply voltage is equal to a positive integer multiple of the analog reference voltage; or the analog supply voltage is equal to a positive integer multiple of the supply voltage; or the analog supply voltage is equal to the sum of a positive integer multiple of the analog reference voltage and a positive integer multiple of the supply voltage.
2. 2. The display device according to claim 1, wherein the analog power supply voltage has a value of V AVDD , the analog reference voltage has a value of V VCI , and the power supply voltage has a value of V VDDI , V AVDD =m×V VCI +n×V VDDI , wherein m and n are non-negative integers, and m and n are not 0at the same time.
3. 3. The display device of claim 2, wherein the display device comprises a display device, V AVDD =2×V VCI 。
4. 4. The display device of claim 1, wherein the display device comprises a display device, If the display picture of the current display mode only partially comprises a black picture, the main control unit controls the refresh frequency of the display panel to be a first frequency; And if the display pictures in the current display mode are black pictures, the main control unit controls the refresh frequency of the display panel to be changed into a second frequency, wherein the second frequency is smaller than the first frequency.
5. 5. The display device of claim 4, wherein the display device comprises a display panel, The base voltage comprises a VCL voltage; if the display pictures in the current display mode are all black pictures, the display panel areas corresponding to the black pictures are all black display sub-pixels; the base voltage generation unit is configured to output a reset voltage to the black display subpixel as the VCL voltage, the VCL voltage being equal to a negative integer multiple of the analog reference voltage.
6. 6. The display device according to claim 5, wherein the VCL voltage has a value of V VCL and the analog reference voltage has a value of V VCI ,V VCL =-1×V VCI .
7. 7. The display device according to claim 5, wherein the display panel includes a reset signal line and a pixel circuit including a driving module and a reset module electrically connected, the driving chip being electrically connected to the reset module through the reset signal line; The reset voltage is transmitted to the reset module through the reset signal line.
8. 8. The display device of claim 4, wherein the display device comprises a display panel, The base voltage comprises a base high-level voltage and a base low-level voltage; if the display pictures in the current display mode are all black pictures, the display panel areas corresponding to the black pictures are all black display sub-pixels; the base voltage generation unit is configured to output a high-level voltage to the black display sub-pixel as the base high-level voltage, the base high-level voltage being equal to the analog power supply voltage; The base voltage generation unit is further configured to output a low-level voltage to the black display subpixel as the base low-level voltage, the base low-level voltage being equal to a negative integer multiple of the analog reference voltage.
9. 9. The display device of claim 8, wherein the display device comprises a display device, The value of the analog power supply voltage is V AVDD , and the value of the analog reference voltage is V VCI ,V AVDD =2×V VCI ; The value of the basic high level voltage is V VGH , and the value of the basic low level voltage is V VGL ,V VGH =V AVDD =2×V VCI ,V VGL =-2×V VCI .
10. 10. The display device of claim 1, wherein the display device comprises a display device, The base voltage includes a positive power supply voltage and a negative power supply voltage; The power supply chip is configured to output a positive power supply voltage, and the power supply chip is further configured to output a negative power supply voltage.
11. 11. The display device of claim 4, wherein the display device comprises a display panel, The base voltage includes a positive power supply voltage and a negative power supply voltage; if the display pictures in the current display mode are all black pictures, the display panel areas corresponding to the black pictures are all black display sub-pixels; The base voltage generation unit is configured to output the positive power supply voltage to the black display subpixel as a positive integer multiple of the analog reference voltage, and the negative power supply voltage as a negative integer multiple of the analog reference voltage.
12. 12. The display device of claim 11, wherein the display device comprises a display device, The positive power supply voltage has a value of V PVDD , and the negative power supply voltage has a value of V PVEE ; The analog reference voltage has a value of V VCI ,V PVDD =1×V VCI ,V PVEE =-1×V VCI .
13. 13. The display device of claim 1, wherein the display device comprises a display device, One data refresh period of the display panel includes a data write frame and a plurality of sustain frames; in the data writing frame, the base voltage generating unit is configured to output a data voltage to the black display sub-pixel; in the hold frame, the base voltage generating unit is configured to output a preset voltage to the black display sub-pixel, wherein the preset voltage is different from the data voltage.
14. 14. The display device of claim 1, wherein the display device comprises a display device, One data refresh period of the display panel includes a data write frame and a plurality of sustain frames; in the data writing frame, the base voltage generating unit is configured to output a data voltage to the black display sub-pixel; In the hold frame, the base voltage generating unit is configured to stop outputting a preset voltage to the black display subpixel.
15. 15. The display device of claim 4, wherein the display device comprises a display panel, If the display pictures in the current display mode are all black pictures, the display panel areas corresponding to the black pictures are all black display sub-pixels; one data refresh period of the display panel includes a data write frame and a plurality of sustain frames; in the data writing frame, the base voltage generating unit is configured to output a data voltage to the black display sub-pixel; In the hold frame, the base voltage generating unit is configured to stop outputting a preset voltage to the black display subpixel.
16. 16. The display device according to any one of claims 13 to 15, wherein the display panel includes a data line and a pixel circuit, the pixel circuit includes a driving module and a data writing module electrically connected, and the driving chip is electrically connected to the data writing module through the data line; the data voltage and the preset voltage are transmitted to the data writing module through the data line.
17. 17. The display device of claim 1, wherein the display device comprises a display device, One data refresh period of the display panel includes a data write frame and a plurality of sustain frames; the base voltage generating unit is configured to output a bias voltage to the black display sub-pixel in the data writing frame and the holding frame.
18. 18. The display device of claim 4, wherein the display device comprises a display panel, If the display pictures in the current display mode are all black pictures, the display panel areas corresponding to the black pictures are all black display sub-pixels; one data refresh period of the display panel includes a data write frame and a plurality of sustain frames; The base voltage generating unit is configured to stop outputting a bias voltage to the black display sub-pixel in the data writing frame and the holding frame.
19. 19. The display device according to any one of claims 17 or 18, wherein the display panel includes a bias voltage line and a pixel circuit including a driving module and a bias adjustment module electrically connected, the driving chip being electrically connected to the bias adjustment module through the bias voltage line; the bias voltage is transferred to the bias adjustment module through the bias voltage line.
20. 20. The display device of claim 1, wherein the display device comprises a display device, If the display picture of the current display mode comprises a non-black picture, the display panel area corresponding to the non-black picture comprises a plurality of color display sub-pixels; The driving chip further comprises a voltage regulating component, wherein the voltage regulating component is configured to obtain accurate gamma reference voltage after the basic voltage is subjected to step-up regulation or step-down regulation, and output the accurate gamma reference voltage to the color display sub-pixels.

Description

Display device Technical Field The disclosure relates to the field of display technologies, and in particular, to a display device. Background Organic Light emitting diode (Organic Light)An OLED) display device has the advantages of self-luminescence, no need of a backlight module, high contrast, high response speed, low power consumption, flexible bending and the like, and is widely applied to various electronic products such as smart phones, tablet computers, notebook computers, vehicle-mounted displays, smart home control panels, wearable devices and the like. With the continuous increase of the requirements of consumer electronics on the endurance capability of devices, the display device is used as a core power consumption component in electronic products, and power consumption optimization becomes one of the core research and development directions in the technical field of display. The display of the OLED display device depends on a display driving chip (DISPLAY DRIVER INTEGRATED Circuit, DDIC, hereinafter referred to as driving chip) to output various driving voltages and data signals to the pixel circuits of the display panel. The display panel has multiple types of driving voltages required for normal display and high precision requirement, so that the driving chip can output diversified driving voltages required for realizing the display effect of the display panel after a series of voltage boosting and voltage reducing adjustment is required. However, in the boosting or reducing process of the driving chip, energy is lost, so that power consumption is lost, the total power consumption of the display device is increased, and the cruising ability of the display device is not improved. Disclosure of Invention In order to solve the technical problems, the present disclosure provides a display device, so as to solve the problems of more loss power consumption, larger total power consumption and unavailable effective improvement of cruising ability in display equipment in the prior art. The disclosure provides a display device, which comprises a control main board, a power supply chip, a driving chip and a display panel, wherein the control main board and the power supply chip are electrically connected with the driving chip, and the driving chip is configured to drive the display panel to display pictures; The power supply chip is configured to provide an analog reference voltage and a power supply voltage to the driving chip; The control main board is configured to send a display mode control instruction to the driving chip, and the driving chip is configured to output a plurality of basic voltages, wherein the basic voltages at least comprise analog power supply voltages; The driving chip comprises a main control unit and a basic voltage generation unit, wherein the main control unit is configured to determine a current display mode according to a display mode control instruction, and the basic voltage generation unit is configured to generate a basic voltage according to an analog reference voltage and a power supply voltage; if the display picture in the current display mode comprises a black picture, the display panel area corresponding to the black picture comprises a plurality of black display sub-pixels, and the basic voltage generating unit is configured to output a first gamma reference voltage to the black display sub-pixels as an analog power supply voltage; wherein the analog supply voltage is equal to a positive integer multiple of the analog reference voltage; Or the analog power supply voltage is equal to a positive integer multiple of the power supply voltage; or the analog supply voltage is equal to the sum of a positive integer multiple of the analog reference voltage and a positive integer multiple of the supply voltage. Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: According to the display device provided by the disclosure, after determining the current display mode according to the display mode control instruction sent by the control main board, if the display picture in the current display mode is determined to include a black picture, the display panel area corresponding to the black picture necessarily includes a plurality of black display sub-pixels, and meanwhile, the main control unit can identify the black picture area and the non-black picture area in the display picture required to be displayed in the current display mode and judge the area of the black display sub-pixels and the area of the color display sub-pixels in the display picture required to be displayed by the display panel. For the black display sub-pixel, the base voltage generating unit included in the driving chip is configured to output the first gamma reference voltage to the black display sub-pixel as an analog power supply voltage, wherein the analog power supply voltage is equal to a positive integer multiple of the analog