CN111341268A - Display driving circuit, display driving method and device - Google Patents
Display driving circuit, display driving method and device Download PDFInfo
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- CN111341268A CN111341268A CN202010284565.2A CN202010284565A CN111341268A CN 111341268 A CN111341268 A CN 111341268A CN 202010284565 A CN202010284565 A CN 202010284565A CN 111341268 A CN111341268 A CN 111341268A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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Abstract
The invention discloses a display driving circuit, a display driving method and device, a computer readable storage medium and a computer device, which comprise a voltage conversion circuit and a power supply circuit, wherein the power supply circuit supplies a power supply voltage with a first voltage to the voltage conversion circuit in a first display stage, and supplies the power supply voltage with a second voltage smaller than the first voltage to the voltage conversion circuit in a second display stage, so that the power consumption of a driving chip can be reduced in the second display stage.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display driving circuit, a display driving method and apparatus, a computer-readable storage medium, and a computer device.
Background
An Active-matrix organic light-emitting diode (AMOLED) panel has the advantages of self-luminescence, bright color, flexibility, and is widely applied to the display fields of mobile phones, foldable products, and the like.
Disclosure of Invention
The embodiment of the invention provides a display driving circuit, a display driving method and a display driving device, which can reduce the power consumption of the display driving circuit.
Accordingly, an embodiment of the present invention provides a display driving circuit, including: the voltage conversion circuit and the power supply circuit;
the power supply circuit is used for generating a power supply voltage with a first voltage in a first display phase and generating the power supply voltage with a second voltage in a second display phase; wherein the second voltage is less than the first voltage;
the voltage conversion circuit is used for receiving a supply voltage with the first voltage in the first display stage and generating a first power supply voltage and a first data voltage which are input to a display panel according to the supply voltage with the first voltage so that the display panel adopts a first display mode to display according to the first power supply voltage and the first data voltage; and the display panel is used for receiving the supply voltage with the second voltage in the second display stage and generating a second power supply voltage and a second data voltage which are input to the display panel according to the supply voltage with the second voltage so as to enable the display panel to display in a second display mode according to the second power supply voltage and the second data voltage.
Optionally, the power supply circuit is further configured to generate a power supply voltage gradually reduced from the first voltage to the second voltage in a blanking period after the first display period and before the second display period.
Optionally, the voltage conversion circuit is further configured to generate an off control signal input to the display panel in the blanking phase, so that the display panel turns off the screen according to the off control signal.
Optionally, the display panel includes sub-pixels arranged in an array and a plurality of light emission control lines; the sub-pixel comprises a light-emitting control transistor and a light-emitting device electrically connected with the light-emitting control transistor;
the grid electrodes of the light-emitting control transistors in one row of the sub-pixels are electrically connected with one light-emitting control line;
the voltage conversion circuit is specifically configured to input a turn-off control signal to each of the light-emitting control lines in the blanking period, so that the light-emitting device in each of the sub-pixels does not emit light.
Optionally, the second power supply voltage is not greater than the first power supply voltage, and/or the second data voltage is not greater than the first data voltage.
Based on the same inventive concept, an embodiment of the present invention further provides a display driving method, including:
in the first display stage, the power supply circuit provides a power supply voltage with a first voltage for the voltage conversion circuit, so that the voltage conversion circuit generates a first power supply voltage and a first data voltage according to the power supply voltage with the first voltage, and inputs the generated first power supply voltage and the generated first data voltage to the display panel, so that the display panel adopts a first display mode to display;
in the second display stage, the power supply circuit provides a power supply voltage with a second voltage for the voltage conversion circuit, so that the voltage conversion circuit generates a second power supply voltage and a second data voltage according to the power supply voltage with the second voltage, and inputs the generated second power supply voltage and the generated second data voltage to the display panel, so that the display panel adopts a second display mode to display; wherein the second voltage is less than the first voltage.
Optionally, after the first display phase and before the second display phase, the method further includes:
a blanking phase in which a supply circuit supplies the voltage conversion circuit with a supply voltage reduced from the first voltage to the second voltage; the voltage conversion circuit provides a turn-off control signal for the display panel to control the display panel to turn off the screen according to the turn-off control signal.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including a display panel and any one of the display driving circuits described above.
Accordingly, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the above-mentioned display driving method provided by embodiments of the present invention.
Accordingly, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the display driving method provided in the embodiment of the present invention.
The invention has the following beneficial effects:
the display driving circuit, the display driving method and device, the computer readable storage medium and the computer device provided by the embodiment of the invention comprise the voltage conversion circuit and the power supply circuit, and the power supply circuit supplies the power supply voltage with the first voltage to the voltage conversion circuit in the first display stage and supplies the power supply voltage with the second voltage smaller than the first voltage to the voltage conversion circuit in the second display stage, so that the power consumption of the driving chip can be reduced in the second display stage. By providing the blanking period after the first display period and before the second display period, display abnormalities due to a decrease in the supply voltage can be avoided.
Drawings
Fig. 1 is a schematic diagram of a display driving circuit according to an embodiment of the invention;
fig. 2 is a schematic diagram of a display panel according to an embodiment of the invention;
FIG. 3 is a flowchart illustrating a display driving method according to an embodiment of the present invention;
fig. 4 is a circuit signal timing diagram of a display driving circuit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connect" or "electrically connect," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
Generally, an AMOLED panel has a driver chip, and the driver chip needs four input voltages for operation, where the four input voltages are: a first input voltage AVDD, a second input voltage VCI, a third input voltage DDIO, and a fourth input voltage DVDD. The power consumption of the driver chip is generally determined by the four input voltages, and specifically, the power consumption P of the driver chip can be determined by the following formula:
P＝IAVDD*UAVDD+IVCI*UVCI+IVDDIO*UVDDIO+IDVDD*UDVDD。
for the determined driving chip, the second input voltage VCI, the third input voltage DDIO and the fourth input DVDD are all digital voltages, and the voltage values thereof are all fixed voltage values. In addition, the voltage levels of the second input voltage VCI, the third input voltage DDIO, and the fourth input voltage DVDD are not adjustable in the normal condition.
The AMOLED panel can realize normal image display. Also, the AMOLED panel has an Always On Display (AOD) mode in addition to a normal Display. In the AOD display, the AMOLED panel may display some simple pictures, such as static pictures, e.g., only display clock, weather, date, etc. However, when the display panel is in the display mode, the first power supply voltage AVDD has substantially the same magnitude as that in the normal display mode, that is, the power consumption of the driving chip is substantially the same in the normal display mode as that in the display mode. This results in an increase in power consumption of the driver chip.
As shown in fig. 1, a display driving circuit 10 according to an embodiment of the present invention includes: a voltage conversion circuit 12 and a power supply circuit 11;
the power supply circuit 11 is used for generating a power supply voltage with a first voltage in a first display phase and generating a power supply voltage with a second voltage in a second display phase; wherein the second voltage is less than the first voltage;
the voltage conversion circuit 12 is configured to receive a supply voltage with a first voltage in a first display stage, and generate a first power supply voltage and a first data voltage input to the display panel 20 according to the supply voltage with the first voltage, so that the display panel 20 performs display in a first display mode according to the first power supply voltage and the first data voltage; and a second display stage for receiving the supply voltage having the second voltage, and generating a second power voltage and a second data voltage input to the display panel 20 according to the supply voltage having the second voltage, so that the display panel 20 performs display in a second display mode according to the second power voltage and the second data voltage.
In a specific implementation, the first display mode may be a normal display mode, and the second display mode may be a message screen display mode. The supply voltage having the first voltage generated by the supply circuit 11 in the first display phase and the supply voltage having the second voltage generated in the second display phase may be the first input voltage AVDD described above. The voltage conversion circuit 12 may be a driver chip.
In the display driving circuit provided in the embodiment of the present invention, the power supply voltage generated by the power supply circuit 11 in the second display stage is smaller than the power supply voltage generated in the first display stage, that is, the first input voltage AVDD received by the driving chip in the display mode of the display panel 20 has the second voltage, the first input voltage AVDD received by the driving chip in the normal display mode has the first voltage, and since the second voltage is smaller than the first voltage, the power consumption of the voltage conversion circuit 12 (that is, the driving chip) in the display mode of the information screen is smaller than the power consumption in the normal display mode, so that the power consumption of the voltage conversion circuit 12 in the display mode of the information screen can be reduced.
In practical implementation, in the embodiment of the present invention, the power supply circuit 11 may be further configured to generate the power supply voltage gradually decreased from the first voltage to the second voltage in a blanking period after the first display period and before the second display period. Therefore, the direct voltage jump can be avoided, and the influence on the element can be avoided.
In a specific implementation, the display panel 20 may further include a plurality of Data lines Data and a power voltage line, and the voltage conversion circuit 12 may provide the first Data voltage and the second Data voltage to the display panel 20 through the Data lines Data and provide the first power voltage and the second power voltage to the display panel 20 through the power voltage line. The sub-pixel may further include a driving transistor for generating a current for causing the light emitting device to emit light under driving of a signal of the electrically connected power supply voltage line and a signal of the electrically connected Data line Data. The specific circuit structure of the sub-pixel may be the same as that in the prior art, and is not described herein.
In a specific implementation, the display panel in the embodiment of the invention may be an AMOLED panel. In the embodiment of the present invention, as shown in fig. 2, the display panel 20 may include sub-pixels 21 arranged in an array and a plurality of emission control lines EM; the sub-pixel may include a pixel circuit and a light emitting device therein; the light emitting device may be an organic light emitting diode, among others. The pixel circuit may include a driving transistor generating a current to drive the light emitting device to emit light and a light emission controlling transistor electrically connected to the light emitting device. Wherein the light emission control transistor is connected between the driving transistor and the light emitting device. When the light emission control transistor is turned on, a current generated by the driving transistor may be input to the light emitting device to cause the light emitting device to emit light. When the light emission control transistor is turned off, the input of current to the light emitting device can be stopped, so that the light emitting device can be made not to emit light.
In specific implementation, as shown in fig. 2, the gates of the emission control transistors in a row of sub-pixels are electrically connected to one emission control line EM. This makes it possible to input a signal to the gate of the emission control transistor through the emission control line EM to control the emission control transistor to be turned on and off. Specifically, a signal which is input through the emission control line EM and can control the conduction of the emission control transistor is an emission control signal; the signal which can control the turn-off of the emission control transistor is input through the emission control line EM as a turn-off control signal.
In practical implementation, in the embodiment of the present invention, the voltage converting circuit 12 may be further configured to generate a blanking control signal input to the display panel 20 in the blanking period, so that the display panel performs screen blanking according to the blanking control signal. In practical applications, when the display panel 20 is switched from the first display stage to the second display stage, the second power voltage input to the display panel 20 by the voltage conversion circuit 12 may be smaller than the first power voltage, and the driving transistors in the sub-pixels 21 of the display panel may have leakage current, so that abnormal display problems such as screen flashing and the like may occur in the display panel 20. In the embodiment of the present invention, the blanking period is set, and the power supply voltage is gradually reduced from the first voltage to the second voltage in the blanking period, so that the display panel 20 is controlled to be turned off in the blanking period, thereby avoiding abnormal display.
In a specific implementation, when the display panel 20 turns off the screen according to the turning-off control signal, the display panel 20 may display a black screen. Illustratively, the display panel may be controlled to display a black screen of 3-6 frames. Of course, the number of frames for turning off the display panel 20 in the blanking stage in practical application can be determined according to practical requirements, and is not limited herein.
Further, the voltage conversion circuit 12 is specifically configured to input an off control signal to each of the emission control lines EM in the blanking period so that the light emitting device in each of the sub-pixels 21 does not emit light. For example, an off control signal is input to each of the emission control lines EM to turn off the emission control transistor, so that no current is input to the light emitting device, and the light emitting device does not emit light, and the display panel 20 displays a black screen.
In particular implementations, in embodiments of the present invention, the second power supply voltage may not be greater than the first power supply voltage, and/or the second data voltage may not be greater than the first data voltage.
In a specific implementation, the voltage conversion circuit 12 may include a charge pump circuit and a linear regulator circuit, and by the charge pump circuit and the linear regulator circuit, the voltage conversion circuit 12 generates a first power voltage and a first data voltage to be input to the display panel 20 according to the power supply voltage having the first voltage, and generates a second power voltage and a second data voltage to be input to the display panel 20 according to the power supply voltage having the second voltage. In practical applications, the second power voltage may be equal to the first power voltage and the second data voltage may be equal to the first data voltage due to different specific configurations of the charge pump circuit and the linear regulator circuit. Alternatively, the second power voltage may be smaller than the first power voltage, and after the power supply voltage is decreased from the first voltage to the second voltage, the first power voltage may also be decreased to the second power voltage. The specific configurations of the charge pump circuit and the linear regulator circuit may be substantially the same as those in the prior art, and are not described herein again.
In practical implementation, the first power voltage or the second power voltage inputted to the display panel 20 by the voltage conversion circuit 12 is provided to each sub-pixel 21 in the display panel, and the power consumption of the sub-pixel 21 can be represented by the following formula: p ═ IEL*UEL. Wherein U isEL＝VELVDD-VELVSS，VELVSSThe cathode voltage of the sub-pixel is usually constant. VELVDDWhen the first power supply voltage is lower than the second power supply voltage, the power supply voltage V is applied to the display panel 20 by the voltage converting circuit 12ELVDDFrom the first power supply voltage to the second power supply voltage, UELThe power consumption of the sub-pixels can be reduced.
Based on the same inventive concept, an embodiment of the present invention further provides a display driving method, as shown in fig. 3, including:
s10, in the first display stage, a power supply circuit provides a power supply voltage with a first voltage to a voltage conversion circuit, so that the voltage conversion circuit generates a first power supply voltage and a first data voltage according to the power supply voltage with the first voltage, and inputs the generated first power supply voltage and the generated first data voltage to a display panel, so that the display panel adopts a first display mode to display;
s20, in the second display stage, the power supply circuit provides a supply voltage with a second voltage to the voltage conversion circuit, so that the voltage conversion circuit generates a second power supply voltage and a second data voltage according to the supply voltage with the second voltage, and inputs the generated second power supply voltage and the generated second data voltage to the display panel, so that the display panel adopts a second display mode to display; wherein the second voltage is less than the first voltage.
In specific implementation, as shown in fig. 3, in the embodiment of the present invention, after the first display stage and before the second display stage, the method may further include:
s15, blanking period, the supply circuit provides the supply voltage reduced from the first voltage to the second voltage for the voltage conversion circuit; the voltage conversion circuit provides a turn-off control signal for the display panel to control the display panel to turn off the screen according to the turn-off control signal.
The present invention will be described in detail with reference to specific examples. It should be noted that the present embodiment is intended to better explain the present invention, but not to limit the present invention.
The following describes the operation of the display driving circuit provided in the embodiment of the present invention with reference to the circuit signal timing diagram shown in fig. 4, by taking the display panel shown in fig. 2 and the display driving circuit shown in fig. 1 as an example. Specifically, the first display period T1, the blanking period T2, and the second display period T3 in fig. 4 are selected for explanation.
In the first display period T1, the power supply circuit 11 supplies four input voltages to the voltage conversion circuit 12 (i.e., the driver chip in the display driver circuit). The four input voltages include a first input voltage AVDD, a second input voltage VCI, a third input voltage DDIO, and a fourth input voltage DVDD. The first input voltage AVDD is a supply voltage having a first voltage, and the first voltage is 7.3V.
The voltage conversion circuit 12 receives the first to fourth input voltages to operate according to the four input voltages. The voltage conversion circuit 12 generates a first data voltage and a first power voltage of 4.6V according to the received first input voltage AVDD of 7.3V.
The voltage conversion circuit 12 supplies an emission control signal to the display panel through the emission control line EM, supplies a first Data voltage to the display panel 20 through the Data line Data, and supplies a first power voltage of 4.6V to each sub-pixel 21 in the display panel 20 through the power voltage line. The sub-pixels 21 normally emit light according to the first data voltage and the first power voltage under the control of the light emitting control signal, so that the display panel 20 is in the first display mode, that is, the display panel 20 is in the normal display mode.
In the stage T21 before the blanking period, the four input voltages supplied by the power supply circuit 11 to the voltage conversion circuit 12 are kept unchanged, and the power supply voltage supplied by the voltage conversion circuit 12 through the power supply voltage line is kept at the first power supply voltage, that is, 5.8V. The voltage converting circuit 12 provides an off control signal to the display panel 20 through the emission control line EM, and all the sub-pixels 21 in the display panel do not emit light under the control of the off control signal, so that the display panel 20 is in an off state.
In the blanking period of the period T22, the supply voltage provided by the supply circuit 11 to the voltage conversion circuit 12 is gradually decreased from the first voltage to the second voltage, that is, the voltage of the first input voltage AVDD is gradually decreased, where the first voltage is 7.3V, the second voltage is 5.8V, and then the first input voltage AVDD is gradually decreased from 7.3V to 5.8V, and then the voltage conversion circuit 12 gradually decreases the generated supply voltage from the first supply voltage of 4.6V to the second supply voltage of 3.6V according to the received gradually decreased first input voltage AVDD. The voltage converting circuit 12 continues to provide the turn-off control signal to the display panel 20 through the light-emitting control line EM, all the sub-pixels 21 in the display panel 20 do not emit light under the control of the turn-off control signal, and the display panel 20 is still in a turn-off state.
During a period T23 after the blanking period, the power supply circuit 11 supplies the voltage conversion circuit 12 with a supply voltage having a second voltage, i.e. the first input voltage AVDD is kept at 5.8V, and the voltage conversion circuit 12 generates the second supply voltage of 3.6V from the received first input voltage AVDD of 5.8V. The voltage conversion circuit 12 continues to provide the turn-off control signal to the display panel 20 through the emission control line EM, all the sub-pixels 21 in the display panel 20 do not emit light under the control of the turn-off control signal, and the display panel 20 maintains the turn-off state.
In the second display period T3, the first input voltage AVDD supplied from the power supply circuit 11 to the voltage conversion circuit 12 is kept at 5.8V. The second input voltage VCI, the third input voltage DDIO, and the fourth input voltage DVDD provided by the power supply circuit 11 to the voltage conversion circuit 12 are the same as those in the first display stage. The voltage conversion circuit 12 generates a second data voltage and a second power voltage of 3.6V from the received first input voltage AVDD of 5.8V. The voltage conversion circuit 12 supplies an emission control signal to the display panel 20 through the emission control line EM, supplies a second Data voltage to the display panel 20 through the Data line Data, and supplies a second power voltage of 3.6V to each sub-pixel 21 in the display panel 20 through the power voltage line. The sub-pixels 21 emit light according to the second data voltage and the second power voltage under the control of the light-emitting control signal, and the display panel 20 is in the second display mode, that is, the display panel is in the message screen display mode.
The second input voltage VCI, the third input voltage DDIO, and the fourth input voltage DVDD are all unchanged, and the first input voltage AVDD is reduced from 7.3V at the first display stage to 5.8V, so that the power consumption of the driver chip is reduced according to the following power consumption formula of the driver chip.
P＝IAVDD*UAVDD+IVCI*UVCI+IVDDIO*UVDDIO+IDVDD*UDVDD。
Further, the power supply voltage supplied to each sub-pixel 21 in the display panel 20 by the voltage conversion circuit 12 is reduced from the first power supply voltage of 4.6V in the first display stage to the second power supply voltage of 3.6V in the second display stage, and the power consumption of the sub-pixel 21 in the display panel 20 is also reduced while the cathode voltage of the sub-pixel 21 in the display panel 20 is kept unchanged.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises a display panel and the display driving circuit provided by the embodiment of the invention. The principle of the display device to solve the problem is similar to the display driving circuit, so the implementation of the display device can be referred to the implementation of the display driving circuit, and repeated details are not repeated herein.
In specific implementation, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
Based on the same inventive concept, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and the program, when executed by a processor, implements the steps of any of the above-mentioned display driving methods provided by embodiments of the present invention. In particular, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
Based on the same inventive concept, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the computer device implements any of the steps of the display driving method provided by the embodiment of the present invention.
The display driving circuit, the display driving method and device, the computer readable storage medium and the computer device provided by the embodiment of the invention comprise the voltage conversion circuit and the power supply circuit, and the power supply circuit supplies the power supply voltage with the first voltage to the voltage conversion circuit in the first display stage and supplies the power supply voltage with the second voltage smaller than the first voltage to the voltage conversion circuit in the second display stage, so that the power consumption of the driving chip can be reduced in the second display stage. By providing the blanking period after the first display period and before the second display period, display abnormalities due to a decrease in the supply voltage can be avoided.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A display driving circuit, comprising: the voltage conversion circuit and the power supply circuit;
the power supply circuit is used for generating a power supply voltage with a first voltage in a first display phase and generating the power supply voltage with a second voltage in a second display phase; wherein the second voltage is less than the first voltage;
the voltage conversion circuit is used for receiving a supply voltage with the first voltage in the first display stage and generating a first power supply voltage and a first data voltage which are input to a display panel according to the supply voltage with the first voltage so that the display panel adopts a first display mode to display according to the first power supply voltage and the first data voltage; and the display panel is used for receiving the supply voltage with the second voltage in the second display stage and generating a second power supply voltage and a second data voltage which are input to the display panel according to the supply voltage with the second voltage so as to enable the display panel to display in a second display mode according to the second power supply voltage and the second data voltage.
2. The display driving circuit according to claim 1, wherein the power supply circuit is further configured to generate a power supply voltage gradually reduced from the first voltage to the second voltage in a blanking period after the first display period and before the second display period.
3. The display driving circuit according to claim 2, wherein the voltage conversion circuit is further configured to generate an off control signal input to the display panel in the blanking period, so that the display panel performs off-screen according to the off control signal.
4. The display driving circuit according to claim 3, wherein the display panel includes sub-pixels arranged in an array and a plurality of light emission control lines; the sub-pixel comprises a light-emitting control transistor and a light-emitting device electrically connected with the light-emitting control transistor;
the grid electrodes of the light-emitting control transistors in one row of the sub-pixels are electrically connected with one light-emitting control line;
the voltage conversion circuit is specifically configured to input a turn-off control signal to each of the light-emitting control lines in the blanking period, so that the light-emitting device in each of the sub-pixels does not emit light.
5. The display driver circuit according to any one of claims 1 to 4, wherein the second power supply voltage is not greater than the first power supply voltage, and/or wherein the second data voltage is not greater than the first data voltage.
6. A display driving method, comprising:
in the first display stage, the power supply circuit provides a power supply voltage with a first voltage for the voltage conversion circuit, so that the voltage conversion circuit generates a first power supply voltage and a first data voltage according to the power supply voltage with the first voltage, and inputs the generated first power supply voltage and the generated first data voltage to the display panel, so that the display panel adopts a first display mode to display;
in the second display stage, the power supply circuit provides a power supply voltage with a second voltage for the voltage conversion circuit, so that the voltage conversion circuit generates a second power supply voltage and a second data voltage according to the power supply voltage with the second voltage, and inputs the generated second power supply voltage and the generated second data voltage to the display panel, so that the display panel adopts a second display mode to display; wherein the second voltage is less than the first voltage.
7. The display driving method according to claim 6, further comprising, after the first display phase and before the second display phase:
a blanking phase in which a supply circuit supplies the voltage conversion circuit with a supply voltage reduced from the first voltage to the second voltage; the voltage conversion circuit provides a turn-off control signal for the display panel to control the display panel to turn off the screen according to the turn-off control signal.
8. A display device comprising a display panel and the display driver circuit according to any one of claims 1 to 5.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the display driving method according to any one of claims 6 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the display driving method according to any of claims 6-7 when executing the program.
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