CN-122024610-A - Display driving chip, display driving method and electronic equipment

Abstract

The application provides a display driving chip, a display driving method and electronic equipment, wherein the chip comprises a detection module, a control module and a signal output end, the control module is used for detecting whether the change of adjacent row signals to be output to a display panel by the chip meets a preset condition or not by the detection module, the control signal output end pre-charges target pixels corresponding to the adjacent row signals in the display panel to a first voltage under the condition that the change of the adjacent row signals meets the preset condition, the conversion rate of the chip is increased to a target rate under the first voltage of the display panel, the control signal output end outputs a second voltage to the target pixels under the condition that the target pixels are pre-charged to the first voltage so as to light the target pixels, and the second voltage is larger than the first voltage.

Inventors

• HOU CHENGCHENG
• ZHANG CHUNHENG
• WANG JIAN
• HU NAIWEI
• LI TAO

Assignees

• 北京奕斯伟计算技术股份有限公司

Dates

Publication Date

20260512

Application Date

20260107

Claims (17)

1. 1. The display driving chip is characterized by comprising a detection module, a control module and a signal output end; The control module is used for detecting whether the change of the adjacent line signals to be output by the chip to the display panel meets a preset condition or not by utilizing the detection module, and controlling the signal output end to precharge target pixels corresponding to the adjacent line signals in the display panel to a first voltage when the change of the adjacent line signals meets the preset condition; The control module is further used for controlling the signal output end to output a second voltage to the target pixel under the condition that the target pixel is pre-charged to the first voltage so as to light the target pixel, and the second voltage is larger than the first voltage.
2. 2. The chip of claim 1, wherein the chip comprises a plurality of chips, The detection module is used for identifying whether the change of two target valid bit signals corresponding to the two stages of latches meets the preset condition or not, and the adjacent row signals comprise the two target valid bit signals.
3. 3. The chip of claim 1, wherein the chip comprises a plurality of chips, The control module is further used for determining a pre-charging voltage based on the polarity identification signal in the chip, and controlling the signal output end to pre-charge the target pixel to the first voltage based on the pre-charging voltage by utilizing the charging circuit in the chip.
4. 4. A chip as claimed in any one of claims 1 to 3, wherein, The control module is further configured to output a precharge enable signal if a change of the adjacent row signal satisfies the preset condition, receive a precharge control signal output by the timing controller, and precharge the target pixel to the first voltage by using a precharge circuit outside the chip based on the precharge enable signal and the precharge control signal.
5. 5. The chip of claim 4, wherein the chip comprises a plurality of chips, The control module is further configured to output a program counter enable signal to the detection module to turn on a program counter function, so that the timing controller controls to turn on a precharge circuit outside the chip based on a polarity identification signal inside the chip when the program counter function is turned on, so as to precharge the target pixel to the first voltage by using the precharge circuit outside the chip.
6. 6. The chip of claim 4, wherein the chip comprises a plurality of chips, The control module is further configured to output a program counter closing signal to the detection module to close a program counter function, so that the timing controller controls to close the precharge circuit and open the lighting output circuit outside the chip when the program counter function is closed, and output the second voltage to the target pixel by using the lighting output circuit.
7. 7. The chip of claim 2, or 3, or 5, or 6, wherein the detection module comprises a first logic gate, a latch, a level shifter, a second logic gate, and an inverter; The control module is further configured to perform a logic operation on the two target valid bit signals by using the first logic gate to obtain a recognition result that characterizes whether a change of the two target valid bit signals meets the preset condition, temporarily store the recognition result by using the latch, output a low-voltage logic signal based on the recognition result, convert the low-voltage logic signal into a high-voltage signal required by a precharge switch by using the level shifter, generate a first control signal of the precharge switch based on the high-voltage signal by using the second logic gate, and output a second control signal of the precharge switch based on the first control signal by using the inverter to precharge the target pixel based on the first control signal and the second control signal.
8. 8. The chip of claim 3, wherein the charging circuit comprises a first polarity switching unit, a second polarity switching unit, a plurality of precharge switches and a plurality of channels, the precharge switches and the channels having a one-to-one correspondence; The first polarity switching unit is connected with a first end of an ith 2+1 precharge switch, a second end of the ith 2+1 precharge switch is connected with a first end of an ith 2+1 channel, and a second end of the ith 2+1 channel is connected with a corresponding pixel, wherein i is an integer greater than or equal to 0; The second polarity switching unit is connected with the first end of the i+2 th precharge switch, the second end of the i+2 th precharge switch is connected with the first end of the i+2 th channel, and the second end of the i+2 th channel is connected with the corresponding pixel; The control module is further configured to control the first polarity switching unit and the second polarity switching unit to generate the precharge voltage based on a polarity identification signal inside the chip, and control the plurality of precharge switches to load the precharge voltage to a channel corresponding to the target pixel, so as to precharge the target pixel.
9. 9. A display driving method, the method comprising: Detecting whether the change of adjacent row signals to be output by the display driving chip to the display panel meets a preset condition or not; Under the condition that the change of the adjacent row signals meets the preset condition, pre-charging target pixels corresponding to the adjacent row signals in the display panel to a first voltage, wherein the conversion rate of the chip is increased to a target rate under the first voltage; outputting a second voltage to the target pixel to light the target pixel when the target pixel is precharged to the first voltage, wherein the second voltage is greater than the first voltage.
10. 10. The method according to claim 9, wherein detecting whether the change of the adjacent row signal to be output from the display driving chip to the display panel satisfies a preset condition comprises: Identifying a state of a precharge function of the chip; And under the condition that the state of the precharge function is an on state, identifying whether the change of two target valid bit signals corresponding to the two stages of latches meets the preset condition, wherein the adjacent row signals comprise the two target valid bit signals.
11. 11. The method of claim 10, wherein identifying whether the change in the two target valid bit signals corresponding to the two stages of latches satisfies the predetermined condition comprises: under the condition that the target significant bit signal is the most significant bit signal, determining the most significant bit signal of the first-stage latch and the most significant bit signal of the second-stage latch respectively; the two target valid bit signals include a most significant bit signal of the first stage latch and a most significant bit signal of the second stage latch; and carrying out logic operation on the most significant bit signal of the first-stage latch and the most significant bit signal of the second-stage latch to obtain a recognition result, wherein the recognition result represents whether the change of the two target significant bit signals meets the preset condition or not.
12. 12. The method of any one of claims 9 to 11, wherein the precharging target pixels corresponding to the adjacent row signals in the display panel to a first voltage comprises: determining a precharge voltage based on a polarity identification signal inside the chip; The target pixel is precharged to the first voltage based on the precharge voltage.
13. 13. The method of any one of claims 9 to 11, wherein the precharging target pixels corresponding to the adjacent row signals in the display panel to a first voltage comprises: Outputting a precharge-on signal in case that the variation of the adjacent row signal satisfies the preset condition; Receiving a precharge control signal; The target pixel is precharged to the first voltage based on the precharge-on signal and the precharge control signal.
14. 14. The method of claim 13, wherein the precharging the target pixel to the first voltage based on the precharge-on signal and the precharge control signal comprises: outputting a program counter enabling signal to start a program counter function, so that the timing controller controls to start a pre-charging circuit outside the chip based on a polarity identification signal inside the chip under the condition that the program counter function is started, and pre-charges the target pixel to the first voltage by using the pre-charging circuit outside the chip.
15. 15. The method of claim 14, wherein outputting a second voltage to the target pixel with the target pixel pre-charged to the first voltage comprises: and outputting a program counter closing signal to close the program counter function when the target pixel is pre-charged to the first voltage, so that the timing controller controls to close a pre-charging circuit outside the chip and open a lighting output circuit when the program counter function is closed, and outputs the second voltage to the target pixel by using the lighting output circuit.
16. 16. The method of claim 9, wherein the operation of identifying the state of the precharge function of the chip is performed independently by the chip or is performed cooperatively by the chip and a timing controller.
17. 17. An electronic device comprising the display driver chip of any one of claims 1 to 8.

Description

Display driving chip, display driving method and electronic equipment Technical Field The present application relates to the field of electronic device thermal management technologies, and in particular, to a display driving chip, a display driving method, and an electronic device. Background As display technology moves toward higher resolution and higher refresh rates, the size of display driver chips continues to shrink, resulting in higher heat generation during operation. Especially when processing complex pictures or heavy-duty pictures, the chip temperature may rise sharply, affecting the stability and the service life of the chip. In the related art, a passive heat dissipation mode or an overall voltage regulation scheme is used to control the temperature of the chip, for example, by reducing the operating voltage of the chip to reduce the power consumption, but such methods often affect the display performance, such as the response speed and the brightness, and it is difficult to effectively control the temperature of the chip while ensuring the display quality. Disclosure of Invention In view of the above, the embodiment of the application provides a display driving chip, a display driving method and an electronic device. The technical scheme of the embodiment of the application is realized as follows: In one aspect, the embodiment of the application provides a display driving chip, which comprises a detection module, a control module and a signal output end; The control module is used for detecting whether the change of the adjacent line signals to be output by the chip to the display panel meets the preset condition or not by utilizing the detection module, and controlling the signal output end to precharge the target pixels corresponding to the adjacent line signals in the display panel to the first voltage when the change of the adjacent line signals meets the preset condition; the control module is also used for outputting a second voltage to the target pixel by the control signal output end under the condition that the target pixel is pre-charged to the first voltage so as to lighten the target pixel, and the second voltage is larger than the first voltage. On the other hand, the embodiment of the application provides a display driving method, which comprises the steps of detecting whether the change of adjacent row signals to be output by a display driving chip to a display panel meets a preset condition or not, precharging target pixels corresponding to the adjacent row signals in the display panel to a first voltage under the condition that the change of the adjacent row signals meets the preset condition, increasing the conversion rate of the chip to a target rate under the first voltage, outputting a second voltage to the target pixels to light the target pixels under the condition that the target pixels are precharged to the first voltage, and enabling the second voltage to be larger than the first voltage. In still another aspect, an embodiment of the present application provides an electronic device, including the display driving chip described above. In the embodiment of the application, the chip can effectively identify heavy-load picture scenes, such as high-dynamic pictures of video playing, animation switching and the like, by detecting whether the change of the adjacent line signals to be output to the display panel meets the preset condition or not by utilizing the detection module, so that a precharge mechanism is started in advance, the impact of transient current on the chip is reduced, the overall conversion efficiency is improved, and the chip temperature is reduced. Under the condition that the change of the adjacent row signals of the chip meets the preset condition, the control signal output end pre-charges the display panel to the first voltage, and transient current during signal loading can be obviously reduced, so that the conversion rate of pixels is accelerated, and meanwhile, the power consumption and the heating value of the chip are reduced, so that the temperature of the chip is reduced. In a display application scene with high refresh rate and high resolution, the precharge operation is performed to effectively prevent the heat accumulation problem caused by frequent switching in a circuit, further prolong the service life of the chip and improve the running stability of the chip. Under the condition that the target pixel is precharged to the first voltage, the control signal output end outputs the second voltage to the target pixel, and the partial area of the display panel is stabilized on the first voltage in the precharge stage, so that when the second voltage is output on the basis of the first voltage, the image update can be completed only by providing a slightly high voltage without charging from zero, and the current requirement and the heating are further reduced. Therefore, the incremental adjustment of the second voltage is performed on the basis