CN110782858A - Display device and power supply control method - Google Patents
Display device and power supply control method Download PDFInfo
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- CN110782858A CN110782858A CN201910980406.3A CN201910980406A CN110782858A CN 110782858 A CN110782858 A CN 110782858A CN 201910980406 A CN201910980406 A CN 201910980406A CN 110782858 A CN110782858 A CN 110782858A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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Abstract
The invention relates to a display device and a power supply control method, wherein the display device comprises a display module; the source driver is connected with the display module and used for driving the display module to display; the power supply module is connected with the source electrode driver and used for providing power supply voltage; and the control module is used for controlling the power supply module to output a first power supply voltage to the source electrode driver when the display module loads a black picture, wherein the first power supply voltage is less than a second power supply voltage when the source electrode driver works normally. The invention also discloses a power supply control method, which judges whether the data to be loaded by each source electrode driving unit in the source electrode driver is black picture data by detecting the data to be loaded by each source electrode driving unit, and reduces the power supply voltage of the source electrode driving unit under the condition of meeting the requirement of black picture display if the data to be loaded by one source electrode driving unit is the black picture data, so as to save power consumption, improve the experience of users and improve the competitiveness of products.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a power control method.
Background
With the diversification development of network and communication services, people have more and more requirements on displays, for example, the display screen size is larger, the display control of the display can be achieved by controlling the liquid crystal display in blocks, and the smaller the power consumption, the better the display is.
The first problem caused by the increase of the area of the display screen is the increase of power consumption, so that the cruising ability of the portable electronic equipment is reduced, the use performance of the electronic equipment is seriously influenced, and inconvenience is brought to users. However, the storage capacity of the existing battery has a certain technical bottleneck, and the breakthrough from the capacity of the battery is difficult to realize.
The existing display, no matter when displaying any picture, the power supply provided for the display is always in the normal working mode, and the working state can not be changed due to the change of picture data, especially for the display with multi-partition display, so that the power supply is always in the normal working state, and the power consumption is larger.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a display device and a power control method thereof to reduce power consumption and improve product competitiveness.
To achieve the above technical effects, according to an aspect of the present invention, there is provided a display device including a display module; the source electrode driver is connected with the display module and used for driving the display module to display; the power supply module is connected with the source electrode driver and used for providing power supply voltage; and the control module is used for controlling the power supply module to output a first power supply voltage to the source electrode driver when the display module is loaded with a black picture, wherein the first power supply voltage is less than a second power supply voltage when the source electrode driver works normally.
As one implementation manner, the display module includes a first display region and a second display region, the source driver includes a first source driving unit and a second source driving unit, the first source driving unit and the second source driving unit are respectively configured to drive the first display region and the second display region to display, and the control module is configured to control the power module to output the second power voltage to the first source driving unit and output the first power voltage to the second source driving unit when the first display region is to display a normal picture and the second display region is to display a black picture.
As an implementation manner, the display device further includes a detection module, configured to send corresponding control signals to the control module according to detected different picture types, where the different picture types include a normal picture and a black picture, and the detection module is a timing controller or the source driver.
As one embodiment, the detecting module at least compares two frames of data when detecting the black picture.
In one embodiment, the source driver includes a black picture gamma voltage module for providing a gray reference voltage for a black picture.
As one embodiment, when the power module is a power chip, the control module is a microcontroller, and the microcontroller is connected to the power chip through an I2C bus.
As an embodiment, when the power module is a first power voltage unit and a second power voltage unit, the control module is a control circuit, wherein the first power unit is configured to output the first power voltage, the second power unit is configured to output the second power voltage, the control circuit includes a first switch element, a second switch element, a third switch element, a fourth switch element, and an inverter, a control terminal of the first switch element receives the control signal, a first path terminal of the first switch element is grounded, a second path terminal of the first switch element is connected to a control terminal of the second switch element, a first path terminal of the second switch element is connected to the first power voltage unit to receive the first power voltage, and a first path terminal of the second switch element is connected to a control terminal of the second switch element, a second path end of the second switching element is connected to the source driver, an input end of the inverter is connected to a control end of the first switching element, an output end of the inverter is connected to a control end of the third switching element, a first path end of the third switching element is grounded, a second path end of the third switching element is connected to a control end of the fourth switching element, a first path end of the fourth switching element is connected to the second power voltage unit to receive the second power voltage, a first path end of the third switching element is connected to the control end of the third switching element, and a second path end of the fourth switching element is connected to the source driver, wherein when the control signal received by the control end of the first switching element is low, the first switching element is turned off, and the control end of the second switching element is high, the second switch element is turned on, meanwhile, the control signal with low level outputs a high level signal to the control end of the third switch element through the inverter, the third switch element is turned on, then the control end of the fourth switch element is grounded, the fourth switch element is turned off, and at this time, the control circuit outputs the first power voltage to the source driver.
In order to achieve the above technical effects, another aspect of the present invention further provides a power control method for a display device, including: detecting data to be loaded by each source driving unit in the source driver; judging whether the data to be loaded by each source electrode driving unit is black picture data or not; if the data to be loaded by a source electrode driving unit is black picture data, outputting a first power supply voltage to the source electrode driving unit; and if the data to be loaded by a source electrode driving unit is normal picture data, outputting a second power supply voltage to the source electrode driving unit, wherein the first power supply voltage is less than the second power supply voltage when the source electrode driver works normally.
As one embodiment, when determining whether the data to be loaded by each source driving unit is black frame data, at least two frames of data are compared.
In one embodiment, the data to be loaded by each source driving unit is detected by the timing controller or each source driving unit.
According to the display device and the power control method for the display device, whether data to be loaded by each source electrode driving unit in the source electrode driver is black picture data or not is judged by detecting the data to be loaded by each source electrode driving unit in the source electrode driver, and if the data to be loaded by one source electrode driving unit is the black picture data, the power supply voltage of the source electrode driving unit is reduced under the condition that the requirement of black picture display is met, so that the power consumption is saved, the user experience is improved, and the product competitiveness is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the invention;
FIG. 2 is a schematic view of a display device according to another embodiment of the present invention;
FIG. 3 is a schematic view showing a structure of the display device of FIG. 2;
FIG. 4 is a schematic diagram of a display device according to an embodiment of the present invention, in which the detecting module is a timing controller;
FIG. 5 is a schematic diagram illustrating a structure of a display device when a detection module is a source driver according to an embodiment of the present invention;
FIG. 6 is another schematic diagram of the display device of FIG. 3;
FIG. 7 shows a circuit diagram of the control circuit of FIG. 6;
fig. 8 shows a flowchart of a power control method according to an embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objectives, the following detailed description will be provided for the specific embodiments, methods, steps, structures, features and effects of the display device and the power control method according to the present invention with reference to the accompanying drawings and preferred embodiments.
The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.
Where certain terms are used throughout the description and claims to refer to particular components, those skilled in the art will appreciate that hardware manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function.
Although the following description uses the terms "first," "second," etc. to describe various signals, these signals should not be limited by the terms. These terms are merely used to distinguish one signal from another without departing from the scope of the various described embodiments. In the present application, the term "pixel unit" denotes a basic display unit associated with one pixel electrode, for example, including a pixel electrode and a thin film transistor connected thereto, a "pixel row" denotes a plurality of pixel units connected to the same gate scan line, a "pixel column" denotes a plurality of pixel units connected to the same source data line, and a "display unit" denotes one or more pixel units for displaying one physical pixel.
First, it should be noted that, in the related art, a liquid crystal display device generally includes a display module, a timing controller, a gate driver, a source driver, a power module, and a common voltage module.
The display module includes, for example, a first substrate and a second substrate facing each other with a liquid crystal layer interposed therebetween. A thin film transistor array and a pixel electrode are formed on the first substrate, and a common electrode is formed on the second substrate. The pixel array of the display module includes a plurality of pixel cells arranged in rows and columns. Each pixel unit comprises a pixel electrode and a thin film transistor connected with the pixel electrode, and a pixel capacitor is formed between each pixel electrode and the common electrode. When displaying an image, a voltage corresponding to a gray level is applied between the common electrode and the pixel electrode of each pixel unit, so that the liquid crystal molecules rotate by a corresponding angle, thereby changing the orientation of the liquid crystal molecules to realize the brightness of the corresponding gray level, and the black picture is a low gray level value with low brightness, a general 8-bit display device comprises 256 gray levels, wherein, for example, 0 gray level represents a full black picture, and several gray levels such as 1, 2 and 3 gray levels near the full black picture are close to the full black picture, and no image is displayed.
The timing controller receives image data from a control terminal (e.g., a video card of a computer) and generates timing signals and data signals according to the image data. The timing controller supplies timing signals to the gate driver and the source driver for controlling the operation timings thereof. Further, the timing controller supplies a data signal to the source driver for representing gray-scale data of each pixel.
The gate driver receives the timing signal and generates a gate driving signal. The gate driving signals are scanning signals and are respectively provided for a row of pixel units in the pixel array. In a frame period of displaying one image, thin film transistors connected with pixel units in the pixel array are gated line by line under the control of a gate driving signal until scanning of all pixel lines is completed.
The source driver receives the timing signal and the gray scale data and converts the gray scale data into corresponding gray scale voltages. During the period that a row of pixel units in the pixel array are conducted, the source driver supplies the gray scale voltage of the corresponding row of pixel units to the pixel electrodes of the pixel units, so that the voltage difference between the pixel electrodes and the common electrode of each pixel unit in the corresponding row of pixel units corresponds to the gray scale data, and the brightness of the corresponding gray scale is realized.
The power module provides a power voltage to the gate driver and the source driver. The common voltage module supplies a common voltage to a common electrode in the display module. The common voltage is, for example, a constant voltage, and thus the gray scale voltage generated by the source driver directly corresponds to the gray scale data.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 1, in this embodiment, the display device includes a display module 10, a source driver 11, a power module 12, and a control module 13. The source driver 11 is connected to the display module 10, and is configured to drive the display module 10 to perform display. The power supply module 12 is connected to the source driver 11 for supplying a power supply voltage. The control module 13 is configured to control the power module 12 to output a first power voltage AVDD _ L to the source driver 11 when the display module 10 is to load a black picture, where the first power voltage is smaller than a second power voltage AVDD _ H when the source driver 11 normally operates.
Specifically, the present application is to reduce the power supply voltage supplied to the source driver 11 when the display device is going to display a black picture, and at this time, since the black picture is displayed, reducing the power supply voltage does not affect the display of the picture, and also can reduce power consumption. Of course, the brightness of the backlight source can be dynamically adjusted at the same time, and the power consumption is further reduced. It should be noted that the detection of the black frame can be performed by the timing controller or the source driver 11, after detecting the black frame, a control signal is sent to the control module 13, after the control module 13 receives the control signal, the control power module 12 outputs the reduced power voltage to the source driver 11, and the source driver 11 includes a gamma voltage module, and the reference voltage when converting the gray-scale data into the gray-scale voltage is generated by the power voltage loaded on the source driver 11, so that after the power voltage is reduced, the corresponding gray-scale voltage is also reduced, and on the display device which is a black frame when no voltage is applied, the lower the gray-scale voltage is, the frame is only darker, so as not to affect the display of the black frame, and for the gray-scale voltage portion of the black frame, it is a common technical means for those skilled in the art, and its specific principle and circuit portion do not affect the clarity of the present invention, The complete description is omitted.
In an embodiment, the display module 10 includes a first display region and a second display region, the source driver 11 includes a first source driving unit and a second source driving unit, the first source driving unit and the second source driving unit are respectively used for driving the first display region and the second display region to display, and the control module 13 is configured to control the power module 12 to output the second power voltage AVDD _ H to the first source driving unit and output the first power voltage AVDD _ L to the second source driving unit when the first display region is to display a normal picture and the second display region is to display a black picture.
Specifically, fig. 2 shows a schematic view of a partitioned display of a display device according to another embodiment of the present invention, fig. 3 shows a schematic view of a structure of the display device of fig. 2, please refer to fig. 2 and fig. 3, in order to better describe the partitioned display of the display device, 3 display regions are taken as an example below, and the corresponding source driver 11 includes 3 source driving units, it should be noted that the multi-partitioned display is not limited to only 2 display regions or 3 display regions. In fig. 2, the display module 10 includes 3 display partitions 20, 21 and 22, the corresponding source driver includes 3 source driving units S1, S2 and S3, the source driving unit S1 is used for controlling the display partition 20 to display, the source driving unit S2 is used for controlling the display partition 21 to display, and the source driving unit S3 is used for controlling the display partition 22 to display. In the prior art, no matter what picture is displayed by the display device, the power supply of each source driving unit is always in a normal working mode, and the working state cannot be changed according to the change of data of each picture, so that the power consumption is high. In the embodiment, referring to fig. 3, the power module 12 includes the same number of power sub-units 120 as the number of the source driving units 110 in the source driver 11, and respectively provides the power voltages to the corresponding source driving units 110 (i.e., S1, S2, and S3 in fig. 2), and the control module 13 then controls each power sub-unit 120 to provide the corresponding power voltage to each source driving unit 110 according to the picture to be displayed by the display module 10. For example, in 3 display regions in fig. 2, when the middle region 21 is a normal picture, i.e. a colored picture, and the other two regions 20 and 22 display a black picture (some account login pages often only display a part of colored content in the middle of the screen), the power supply voltage of the source driving units S1 and S3 is reduced to a power supply voltage that only needs to satisfy the display requirement of the black picture.
In an embodiment, the display device further includes a detection module, configured to send corresponding control signals to the control module according to the detected different frame types, where the different frame types include a normal frame and a black frame, and the detection module is a timing controller or a source driver.
Fig. 4 and 5 respectively show a schematic structural diagram of a display device when the detection module is a source driver 11 and a timing controller 14, please refer to fig. 4 and 5, specifically, the detection module is used for detecting a type of a picture to be displayed by the display device and sending a corresponding control signal to a control module 13 according to the type of the picture, which may be the timing controller 14 or the source driver 11, whereas in the display device with multi-partition display, when the detection is performed by using the source driver, each source driving unit 110 in fig. 4 and 5 respectively detects corresponding gray scale data, and then sends a corresponding control signal to the control module 13 according to the type of the picture in each display area. For example, the control signal is low when a black frame is detected, and the control signal is high when a normal frame is detected.
In one embodiment, the detecting module at least compares two frames of data when detecting the black frame.
Specifically, since there is a certain delay in the image display process, in order to ensure the accuracy of reducing the power supply voltage, when detecting the black image, comparing at least two frames of gray scale data, if all the gray scale data are the same and are smaller than the fourth level gray scale L4, the black image is determined, wherein when the gray scale data are smaller than the fourth level gray scale, i.e., L0, L1, L2 and L3 are basically black images, and the specific black image boundary criterion is set according to the actual situation.
In one embodiment, the source driver includes a black picture gamma voltage module for providing a gray scale reference voltage for a black picture.
Specifically, the black frame gamma voltage module only provides a reference voltage for obtaining a corresponding gray scale voltage when detecting a black frame, for example, when detecting a black frame, by comparing at least two frames of gray scale data, if all the gray scale data are the same and smaller than the fourth gray scale data L4, it is determined that the black frame is a black frame, wherein the gray scale data smaller than the fourth gray scale data, i.e., L0, L1, L2 and L3 are black frames, and at this time, the positive and negative polarity voltages of the gray scales of L0, L1, L2 and L3 all use the output voltage of the black frame gamma voltage module as the reference voltage. The output voltage of the black image gamma voltage module is obtained by dividing the power voltage provided by the power module in the above embodiment. It is worth mentioning that, when the source driver includes a plurality of source driving units, each of the source driving units includes a black picture gamma voltage module.
Referring to fig. 1, in an embodiment, when the power module 12 is a power chip, the control module 13 is a microcontroller, and the microcontroller is connected to the power chip through an I2C bus.
Specifically, when the power module 12 is a power chip and the control module 13 is a microcontroller, the microcontroller and the power chip are connected via an I2C bus, that is, the microcontroller writes the parameters to be changed via an I2C interface (SCL and SDA) to the designated address of the power chip to output the corresponding power voltage. Of course, in a multi-display device, for example, the power supply subunits 120 of the power supply module 12 in fig. 3 are all power supply chips.
Fig. 6 is another schematic structural diagram of the display device of fig. 3, and fig. 7 is a circuit diagram of the control circuit of fig. 6, please refer to fig. 3, fig. 6 and fig. 7 in combination, in this embodiment, when the power module 12 is the first power voltage unit and the second power voltage unit, the control module 13 is a plurality of same control circuits. Wherein the first power supply unit is configured to output a first power supply voltage AVDD _ L, the second power supply unit is configured to output a second power supply voltage AVDD _ H, the control circuit includes a first switch element T1, a second switch element T2, a third switch element T3, a fourth switch element T4, and an inverter U1, a control terminal of the first switch element T1 receives the control signal, a first pass terminal of the first switch element T1 is grounded, a second pass terminal of the first switch element T1 is connected to a control terminal of the second switch element T2, a first pass terminal of the second switch element T2 is connected to the first power supply voltage unit to receive the first power supply voltage AVDD _ L, a first pass terminal of the second switch element T2 is connected to a control terminal of the second switch element T2, a second pass terminal of the second switch element T2 is connected to the source driver 31, and an input terminal of the inverter U1 is connected to a control terminal of the first switch element T1, an output terminal of the inverter U1 is connected to a control terminal of the third switching element T3, a first path terminal of the third switching element T3 is grounded, a second path terminal of the third switching element T3 is connected to a control terminal of the fourth switching element T4, a first path terminal of the fourth switching element T4 is connected to the second power voltage unit to receive the second power voltage AVDD _ H, a first path terminal of the third switching element T3 is connected to a control terminal of the third switching element T3, and a second path terminal of the fourth switching element T4 is connected to the source driver 11. When the control signal C1 received by the control terminal of the first switch element T1 is at a low level, the first switch element T1 is turned off, the control terminal of the second switch element T2 is at a high level, the second switch element T2 is turned on, and the low-level control signal C1 outputs a high-level signal to the control terminal of the third switch element T3 through the inverter U1, so that the third switch element T3 is turned on, the control terminal of the fourth switch element T4 is grounded, the fourth switch element T4 is turned off, and at this time, the control circuit outputs the first power supply voltage AVDD _ L to the source driver 11.
Specifically, it should be noted that the drawings are only for better illustration, and when the display device has no partitioned display, one control circuit is connected to the source driver, and when the display device has a plurality of partitions, that is, as shown in fig. 6, one control circuit is correspondingly connected to one source driving unit S1, S2, or S3. Fig. 7 illustrates an example of a control circuit corresponding to one of the source driving units, and as mentioned above, the control signal C1 in fig. 7 may be from the corresponding source driving unit or from the timing controller. In the present embodiment, the first switching element T1 and the third switching element T3 are N-type MOS transistors, and the second switching element T2 and the fourth switching element T4 are P-type MOS transistors for each switching element, but may be other switching elements having the same effect.
In summary, in the embodiment of the display device of the invention, whether the data to be loaded in the source driver is the black frame data is determined by detecting the data to be loaded in the source driver, and if the data to be loaded in the source driver is the black frame data, the power voltage of the source driver is reduced in accordance with the requirement of the black frame display, so as to save power consumption, improve user experience, and improve product competitiveness.
The following is an embodiment of the method of the present invention, and fig. 8 shows a flowchart of a power control method according to an embodiment of the present invention, and as shown in fig. 8, the power control method includes:
s10: detecting data to be loaded by each source driving unit in the source driver;
s11: judging whether the data to be loaded by each source electrode driving unit is black picture data or not;
s12: if the data to be loaded by a source electrode driving unit is black picture data, outputting a first power supply voltage to the source electrode driving unit; if the data to be loaded by a source electrode driving unit is normal image data, a second power supply voltage is output to the source electrode driving unit, wherein the first power supply voltage is smaller than the second power supply voltage when the source electrode driver works normally.
In one embodiment, when determining whether the data to be loaded by each source driving unit is black frame data, at least two frames of data are compared.
Specifically, since there is a certain delay in the image display process, in order to ensure the accuracy of reducing the power supply voltage of the present invention, when detecting the black frame, by comparing at least two frames of gray scale data, for example, if all the gray scale data are the same and smaller than the fourth gray scale L4, it is determined that the black frame is a black frame, where the data smaller than the fourth gray scale, i.e., L0, L1, L2, and L3 are basically black frames, and the specific black frame boundary criteria are set according to the actual situation.
In one embodiment, the data to be loaded by each source driving unit is detected by the timing controller or each source driving unit.
In summary, the power control method disclosed in the present invention determines whether data to be loaded by each source driving unit in the source driver is black image data by detecting the data to be loaded by each source driving unit in the source driver, and reduces the power voltage of the source driving unit in accordance with the requirement of black image display if the data to be loaded by one source driving unit is black image data, so as to save power consumption, improve user experience, and improve product competitiveness.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (10)
1. A display device, comprising:
a display module;
the source electrode driver is connected with the display module and used for driving the display module to display;
the power supply module is connected with the source electrode driver and used for providing power supply voltage;
and the control module is used for controlling the power supply module to output a first power supply voltage to the source electrode driver when the display module is loaded with a black picture, wherein the first power supply voltage is less than a second power supply voltage when the source electrode driver works normally.
2. The display device according to claim 1, wherein the display module includes a first display region and a second display region, the source driver includes a first source driving unit and a second source driving unit, the first source driving unit and the second source driving unit are respectively configured to drive the first display region and the second display region to display,
the control module is used for controlling the power module to output the second power voltage to the first source electrode driving unit and output the first power voltage to the second source electrode driving unit when the first display area displays a normal picture and the second display area displays a black picture.
3. The display device according to claim 1, further comprising a detection module for sending corresponding control signals to the control module according to the detected different frame types, wherein the different frame types include a normal frame and a black frame, and the detection module is a timing controller or the source driver.
4. The display device according to claim 3, wherein the detecting module compares at least two frames of data when detecting the black frame.
5. The display device as claimed in claim 1, wherein the source driver comprises a black picture gamma voltage module for providing a gray scale reference voltage for a black picture.
6. The display device according to claim 1, wherein when the power supply module is a power supply chip, the control module is a microcontroller, and the microcontroller is connected with the power supply chip through an I2C bus.
7. The display device according to claim 3, wherein the control module is a plurality of control circuits when the power supply module is a first power supply unit and a second power supply unit, wherein the first power supply unit is configured to output the first power supply voltage and the second power supply unit is configured to output the second power supply voltage,
wherein the control circuit includes a first switch element, a second switch element, a third switch element, a fourth switch element, and an inverter, a control terminal of the first switch element receives the control signal, a first path terminal of the first switch element is grounded, a second path terminal of the first switch element is connected to a control terminal of the second switch element, a first path terminal of the second switch element is connected to the first power voltage unit to receive the first power voltage, a first path terminal of the second switch element is connected to a control terminal of the second switch element, a second path terminal of the second switch element is connected to the source driver, an input terminal of the inverter is connected to the control terminal of the first switch element, an output terminal of the inverter is connected to the control terminal of the third switch element, and a first path terminal of the third switch element is grounded, a second path terminal of the third switching element is connected to a control terminal of the fourth switching element, a first path terminal of the fourth switching element is connected to the second power voltage unit to receive the second power voltage, the first path terminal of the third switching element is connected to the control terminal of the third switching element, the second path terminal of the fourth switching element is connected to the source driver,
when the control signal received by the control end of the first switch element is at a low level, the first switch element is turned off, the control end of the second switch element is at a high level, the second switch element is turned on, meanwhile, the control signal at the low level outputs a high level signal to the control end of the third switch element through the phase inverter, the third switch element is turned on, then the control end of the fourth switch element is grounded, the fourth switch element is turned off, and at this time, the control circuit outputs the first power voltage to the source driver.
8. A power supply control method for a display device, the power supply control method comprising:
detecting data to be loaded by each source driving unit in the source driver;
judging whether the data to be loaded by each source electrode driving unit is black picture data or not;
if the data to be loaded by a source electrode driving unit is black picture data, outputting a first power supply voltage to the source electrode driving unit; and if the data to be loaded by a source electrode driving unit is normal picture data, outputting a second power supply voltage to the source electrode driving unit, wherein the first power supply voltage is less than the second power supply voltage when the source electrode driver works normally.
9. The method of claim 8, wherein at least two frames of data are compared when determining whether the data to be loaded by each source driving unit is black frame data.
10. The power control method for a display device according to claim 8, wherein the data to be loaded by each source driving unit is detected by the timing controller or each source driving unit.
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| CN201910980406.3A CN110782858A (en) | 2019-10-15 | 2019-10-15 | Display device and power supply control method |
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| CN111243540A (en) * | 2020-02-21 | 2020-06-05 | 合肥鑫晟光电科技有限公司 | Driving method and driving circuit of display panel and display device |
| CN113593474A (en) * | 2021-07-28 | 2021-11-02 | 昆山国显光电有限公司 | Gamma debugging method, display driving chip and display device |
| CN117437880A (en) * | 2023-12-20 | 2024-01-23 | 维信诺科技股份有限公司 | Display device and control method thereof |
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