CN115424591B - Display panel, driving method thereof and electronic equipment - Google Patents
Display panel, driving method thereof and electronic equipment Download PDFInfo
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- CN115424591B CN115424591B CN202211048265.XA CN202211048265A CN115424591B CN 115424591 B CN115424591 B CN 115424591B CN 202211048265 A CN202211048265 A CN 202211048265A CN 115424591 B CN115424591 B CN 115424591B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The application provides a display panel, a driving method thereof and electronic equipment, wherein the display panel comprises a plurality of pixel units and a plurality of selection circuits, the selection circuits are used for receiving control signals and driving signals, each selection circuit comprises at least two selection channels, and the conduction of the corresponding selection channels is controlled according to the control signals so as to transmit the driving signals to the pixel units through the conducted selection channels, and the pixel units are driven to work; wherein the current values of the driving signals transmitted in different selection paths are different. The driving signals are transmitted to the pixel units through different selection paths, so that the pixel units can be driven to work by the driving signals with smaller current values when the temperature of the display panel is higher; when the temperature of the display panel is lower, the pixel units are driven to work by the driving signals with larger current values, so that the working capacity of the pixel units driven by the driving signals is considered, the temperature of the display panel is effectively reduced, and risks of polarization, fire and the like of liquid crystals in the display panel are reduced.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and an electronic device.
Background
Display technology has been one of the important research directions in electronic devices, and with the development of display technology, the demand for refresh rate of display screens has been increasing. The higher the refresh rate, the stronger the driving capability of the driving architecture is required, and along with the enhancement of the driving capability, the larger the current transmitted by the circuit of the display screen is, which easily causes the temperature rise of the display screen, and increases the risks of polarization, fire and the like of the display liquid crystal.
Disclosure of Invention
The application discloses display panel can solve the technical problem that display panel temperature is easy to rise when taking into account display panel driving capability.
In a first aspect, the present application provides a display panel, where the display panel includes a plurality of pixel units and a plurality of selection circuits, where each selection circuit is configured to receive a control signal and a driving signal, each selection circuit includes at least two selection paths, and control, according to the control signal, conduction of the corresponding selection path, so as to transmit the driving signal to the pixel unit through the conducted selection path, and drive the pixel unit to work; wherein the current values of the driving signals transmitted by different selection paths are different.
Transmitting the driving signals to the pixel units through different selection paths, and driving the pixel units to work by the driving signals with smaller current values when the temperature of the display panel is higher; when the temperature of the display panel is lower, the pixel units are driven to work by the driving signals with larger current values, so that the working capacity of the pixel units driven by the driving signals is considered, the temperature of the display panel is effectively reduced, and risks of polarization, ignition and the like of liquid crystals in the display panel are reduced.
Optionally, the selection circuit includes a first switch unit, a second switch unit, a first resistor and a second resistor, gates of the first switch unit and the second switch unit are both used for receiving the control signal, the control signal is used for controlling the first switch unit or the second switch unit to be turned on, the first switch unit is connected with the first resistor in series to form one of the selection paths, and the second switch unit is connected with the second resistor in series to form the other selection path.
Optionally, the display panel further includes a control circuit, where the control signal includes a first control sub-signal and a second control sub-signal, and the control circuit is configured to receive a first display signal or a second display signal, generate the first control sub-signal according to the first display signal, and generate the second control sub-signal according to the second display signal; the first switch unit is conducted according to the first control sub-signal, and the second switch unit is conducted according to the second control sub-signal; the first display signal has a first frequency, the second display signal has a second frequency, the first frequency is smaller than the second frequency, and the sum of resistance values of each first resistor is smaller than the sum of resistance values of each second resistor.
Optionally, the display panel further includes a temperature detection circuit, where the temperature detection circuit is configured to detect a temperature of the pixel unit and generate a detection signal, and the control circuit is further configured to generate the first control sub-signal or the second control sub-signal according to the detection signal.
Optionally, the first switch unit and the second switch unit are respectively and electrically connected to the control circuit, the first switch unit is configured to receive the first control sub-signal, and the second switch unit is configured to receive the second control sub-signal.
Optionally, the gates of the first switch unit and the second switch unit are electrically connected, and the gates of the first switch units different from the selection circuit are connected in parallel and electrically connected to the control circuit, so as to receive the first control sub-signal or the second control sub-signal, the first switch unit is turned off according to the second control sub-signal, and the second switch unit is turned off according to the first control sub-signal.
In a second aspect, the present application also provides a display panel driving method, including:
acquiring a control signal and a driving signal;
controlling the corresponding selection channel to be conducted according to the control signal;
transmitting the driving signals to the pixel units of the display panel through the corresponding selection channels;
wherein the current values of the driving signals transmitted by different selection paths are different.
Optionally, the display panel driving method further includes:
acquiring a first display signal or a second display signal;
generating a first control sub-signal according to the first display signal or generating a second control sub-signal according to the second display signal;
and conducting the corresponding selection passage according to the first control sub-signal or conducting the corresponding selection passage according to the second control sub-signal.
Optionally, the display panel driving method further includes:
dividing the pixel unit into a plurality of detection areas;
acquiring a temperature value of the detection area and generating a detection signal;
generating a first control sub-signal or a second control sub-signal according to the detection signal;
and conducting the corresponding selection passage according to the first control sub-signal or conducting the corresponding selection passage according to the second control sub-signal.
In a third aspect, the present application further provides an electronic device, where the electronic device includes a housing and the display panel according to the first aspect, and the housing is used to carry the display panel.
Drawings
For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a display panel circuit frame according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a possible driving signal and current waveform in the related art.
Fig. 3 is a schematic diagram of driving signals and current waveforms according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a selection circuit according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a display panel circuit frame according to another embodiment of the present application.
Fig. 6 is a schematic diagram of a display panel circuit frame according to another embodiment of the present application.
Fig. 7 is a schematic diagram of detection area division according to an embodiment of the present application.
Fig. 8 is a schematic diagram of a selection circuit according to another embodiment of the present application.
Fig. 9 is a schematic flow chart of a driving method of a display panel according to an embodiment of the present application.
Fig. 10 is a schematic top view of an electronic device according to an embodiment of the present application.
Reference numerals illustrate: the display panel-1, the pixel unit-11, the selection circuit-12, the selection path-121, the first switch unit-122, the second switch unit-123, the first resistor-124, the second resistor-125, the control circuit-13, the temperature detection circuit-14, the detection area-15, the electronic device-2 and the shell-21.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1, fig. 1 is a schematic diagram of a display panel circuit frame according to an embodiment of the present application. The display panel 1 includes a plurality of pixel units 11 and a plurality of selection circuits 12, the selection circuits 12 are configured to receive a control signal and a driving signal, each selection circuit 12 includes at least two selection paths 121, and control the corresponding selection paths 121 to be turned on according to the control signal, so as to transmit the driving signal to the pixel units 11 through the turned-on selection paths 121, and drive the pixel units 11 to operate; wherein the current values of the driving signals transmitted on different ones of the selection paths 121 are different in magnitude.
It should be noted that, as shown in fig. 1, each of the selection circuits 12 receives at least one of the driving signals, and the voltage/current values of each of the driving signals may be different or the same. Each driving signal may drive the corresponding pixel unit 11, and the pixel unit 11 needs to be charged by a data voltage under the driving of the driving signal, so as to realize the function of displaying a picture on the display panel 1. In order to achieve a high refresh rate of the display panel 1, the driving signal needs to drive the pixel unit 11 to operate at a higher frequency, and as the refresh rate is larger, the driving capability of the driving signal is required to be stronger, and the current value of the driving signal is also larger.
For example, referring to fig. 2 together, fig. 2 is a schematic diagram of a possible driving signal and current waveform in the related art. As shown in fig. 2, the display panel 1 is used as a normal display mode when displaying at a refresh rate of 120Hz, and the display panel 1 adopts a Dual Data Line (DLG) driving architecture, so that the display panel 1 can display at a refresh rate of 240Hz as a DLG display mode. It can be seen that in DLG display mode, a higher display refresh rate can be achieved with the total display data amount remaining unchanged, however, as the frequency of the drive signal increases, the current waveform peak of the drive signal on the transmission line increases. As shown in fig. 2, in the DLG display mode, when the refresh rate is adjusted to 2 times that of the normal display mode while the total display data amount remains unchanged, the frequency of the driving signal is also changed to 2 times that of the original driving signal, and the peak of the current waveform of the driving signal on the transmission line increases. Therefore, when the driving signal is transmitted to the circuit of the display panel 1, the higher the requirement for the carrying capacity of the circuit of the display panel 1 is, the higher the temperature of the display panel 1 is, and the polarization, the fire, and the like of the liquid crystal of the display panel 1 are easily caused.
It will be appreciated that adding a load, such as a resistor, to the transmission line of the drive signal may adjust the magnitude of the current value of the drive signal on the transmission line. In the present embodiment, a load consuming different electric power may be provided on different ones of the selection paths 121 in each of the selection circuits 12, so that the magnitude of the current value of the driving signal transmitted on the different ones of the selection paths 121 is different.
Specifically, referring to fig. 3 together, fig. 3 is a schematic diagram of driving signals and current waveforms according to an embodiment of the present application. Adding a load to the transmission line of the driving signal changes the magnitude of the current value of the driving signal, which necessarily affects the ability of the driving signal to drive the pixel unit 11 to operate. As shown in fig. 3, a load is added to the transmission line of the driving signal, and although the peak of the current waveform of the driving signal on the transmission line is reduced, the rising and falling trends of the driving signal are also slowed down, which may affect the undercharge or the erroneous charge of the pixel unit 11, and affect the normal display of the display panel 1.
Therefore, in the present embodiment, the driving signals are transmitted through the different selection paths 121, so that the display panel 1 can achieve both the display screen effect and the temperature reduction of the display panel 1. For example, when the refresh rate of the display panel 1 is 120Hz, the selection path 121 with smaller power consumption is used to transmit the driving signal to the pixel unit 11, so that the driving signal has a stronger driving capability to drive the pixel unit 11, thereby achieving a better display effect; or when the refresh rate of the display panel 1 is 240Hz, the selection path 121 with larger consumption power transmits the driving signal to the pixel unit 11, so that the current value of the driving signal is reduced, and the temperature of the display panel 1 is effectively reduced; or, when the refresh rate of the display panel 1 is 240Hz, and at this time, the temperature of the display panel 1 is still low, the selection path 121 with low power consumption may still transmit the driving signal to the pixel unit 11, so that the driving signal has a strong driving capability to drive the pixel unit 11, thereby achieving a good display effect.
It can be understood that, in the present embodiment, the pixel unit 11 may be driven to operate by the driving signal with a smaller current value when the temperature of the display panel 1 is higher by transmitting the driving signal to the pixel unit 11 through the different selection paths 121; when the temperature of the display panel 1 is lower, the pixel unit 11 is driven to work by the driving signal with a larger current value, so that the working capacity of the pixel unit 11 is driven by the driving signal, the temperature of the display panel 1 is effectively reduced, and the risks of polarization, ignition and the like of liquid crystal in the display panel 1 are reduced.
Next, the present application will be described by taking the example in which the selection circuit 12 includes two selection paths 121, but the number of the selection paths 121 is not limited to the present application. It can be appreciated that the embodiment of the selection circuit 12 including more than two selection paths 121 can be derived by referring to the embodiment of the selection circuit 12 including two selection paths 121, which is not described herein.
In one possible embodiment, please refer to fig. 4, fig. 4 is a schematic diagram of a selection circuit according to an embodiment of the present application. The selection circuit 12 includes a first switch unit 122, a second switch unit 123, a first resistor 124 and a second resistor 125, gates of the first switch unit 122 and the second switch unit 123 are both configured to receive the control signal, the control signal is configured to control the first switch unit 122 or the second switch unit 123 to be turned on, the first switch unit 122 and the first resistor 124 are connected in series to form one of the selection paths 121, and the second switch unit 123 and the second resistor 125 are connected in series to form the other selection path 121.
Specifically, the first switch unit 122 and the second switch unit 123 are transistors, and the first switch unit 122 and the first resistor 124 are connected in series to form one of the selection paths 121, which means that one end of a source or a drain of the first switch unit 122 receives the driving signal, the other end is electrically connected to the first resistor 124, and the other end of the first resistor 124 is electrically connected to the pixel unit 11; or, one end of the first resistor 124 receives the driving signal, the other end is electrically connected to one of the source electrode or the drain electrode of the first switch unit 122, and the other electrode of the source electrode or the drain electrode of the first switch unit 122 is electrically connected to the pixel unit 11, so long as the first switch unit 122 and the first resistor 124 are not affected to form one of the selection paths 121 in series connection, which is not limited in this application. The second switch unit 123 and the second resistor 125 are connected in series to form another selection path 121, and the content of one of the selection paths 121 is referred to as the first switch unit 122 and the first resistor 124 connected in series, which is not described herein.
It can be appreciated that, in the present embodiment, the resistances of the first resistor 124 and the second resistor 125 are different, and by controlling the on states of the first switch unit 122 and the second switch unit 123, the driving signal may be transmitted to the pixel unit 11 through different selection paths 121, so that the current values of the driving signals transmitted through different selection paths 121 are different.
For example, when the first switching unit 122 is turned on and the second switching unit 123 is turned off, the driving signal is transmitted to the pixel unit 11 through the first switching unit 122 and the first resistor 124; alternatively, when the second switching unit 123 is turned on and the first switching unit 122 is turned off, the driving signal is transmitted to the pixel unit 11 through the second switching unit 123 and the second resistor 125; alternatively, the first switch unit 122 and the second switch unit 123 may be turned on, and the driving signal may be transmitted to the pixel unit 11 through two selection paths 121, which is not limited in this application.
The first resistor 124 and the second resistor 125 may be resistors, not one in number, or may be resistor strings, and may be formed by connecting a plurality of resistors in series or parallel.
In one possible embodiment, please refer to fig. 5, fig. 5 is a schematic diagram of a display panel circuit frame according to another embodiment of the present application. The display panel 1 further includes a control circuit 13, where the control signal includes a first control sub-signal and a second control sub-signal, and the control circuit 13 is configured to receive a first display signal or a second display signal, generate the first control sub-signal according to the first display signal, and generate the second control sub-signal according to the second display signal; the first switch unit 122 is turned on according to the first control sub-signal, and the second switch unit 123 is turned on according to the second control sub-signal; the first display signal has a first frequency, the second display signal has a second frequency, the first frequency is smaller than the second frequency, and the sum of the resistance values of each first resistor 124 is smaller than the sum of the resistance values of each second resistor 125.
Specifically, the control circuit 13 obtains display data to generate the control signal to control the selection circuit 12 to be turned on, so that the driving signal sequentially drives the corresponding pixel units 11 to be charged by the data voltage, thereby realizing the display function of the display panel 1. In this embodiment, the display panel 1 may perform display at different refresh rates, and since the first display signal has the first frequency and the second display signal has the second frequency, the control circuit 13 generates the first control sub-signal according to the first display signal, and controls the driving signal to drive the pixel unit 11 at the first frequency to be charged by the data voltage, so as to implement display of the display panel 1 at the refresh rate of the first frequency; the control circuit 13 generates the second control sub-signal according to the second display signal, and controls the driving signal to drive the pixel unit 11 at the second frequency to be charged by the data voltage, so as to realize the display of the display panel 1 at the refresh rate of the second frequency.
It can be appreciated that in this embodiment, the first frequency is smaller than the second frequency, for example, the first frequency is 120Hz, the second frequency is 240Hz, and as described above, in order to reduce the temperature of the display panel 1 when the display panel 1 displays at a higher refresh rate, the sum of the resistance values of each first resistor 124 is smaller than the sum of the resistance values of each second resistor 125. In other words, when the control circuit 13 generates the first control sub-signal according to the first display signal, the driving signal is transmitted to the pixel unit 11 through the selection path 121 with less power consumption, so as to achieve a better display effect; when the control circuit 13 generates the second control sub-signal according to the second display signal, the driving signal is transmitted to the pixel unit 11 through the selection path 121 with larger power consumption, so as to effectively reduce the temperature of the display panel 1.
Specifically, the resistance value of each first resistor 124 may be different or the same; the resistance value of each of the second resistors 125 may be different or the same; and the resistance of the first resistor 124 and the resistance of the second resistor 125 may be changed according to practical situations, so long as the sum of the resistance values of each first resistor 124 is not affected to be smaller than the sum of the resistance values of each second resistor 125, which is not limited in the present application.
In one possible embodiment, please refer to fig. 6, fig. 6 is a schematic diagram of a display panel circuit frame according to another embodiment of the present application. The display panel 1 further comprises a temperature detection circuit 14, the temperature detection circuit 14 is configured to detect a temperature of the pixel unit 11 and generate a detection signal, and the control circuit 13 is further configured to generate the first control sub-signal or the second control sub-signal according to the detection signal.
The temperature of the display panel 1 is relatively high, and is mainly that the temperature of the pixel unit 11 or the portion of the pixel unit 11 corresponding to the display panel 1 is relatively high. Therefore, in the present embodiment, the temperature detection circuit 14 detects the temperature of the pixel unit 11, and dynamically adjusts the magnitude of the current value transmitted by the driving signal on the selection path 121 according to the temperature of the pixel unit 11.
For example, the sum of the resistance values of each first resistor 124 is smaller than the sum of the resistance values of each second resistor 125, when the temperature of the pixel unit 11 is too high, the control circuit 13 generates the second control sub-signal according to the detection signal, so that the driving signal is transmitted to the pixel unit 11 with a smaller current value through the selection path 121 formed by the second switch unit 123 and the second resistor 125, thereby effectively reducing the overall temperature of the display panel 1; when the temperature of the pixel unit 11 is smaller, the control circuit 13 generates the first control sub-signal according to the detection signal, so that the driving signal is transmitted to the pixel unit 11 through the selection path 121 formed by the first switch unit 122 and the first resistor 124 with a larger current value, thereby realizing a better display effect of the display panel 1.
Specifically, in order to avoid the temperature detection circuit 14 from affecting the normal display of the pixel unit 11, the temperature detection circuit 14 may divide the detection area 15 of the display panel 1 to detect the average temperature of the plurality of pixel units 11 in the detection area 15 at the same time. Referring to fig. 7, fig. 7 is a schematic diagram of detection region division according to an embodiment of the present application. As shown in fig. 7, each detection area 15 includes a plurality of pixel units 11, so that the circuit arrangement of the temperature detection circuit 14 in the display area of the display panel 1 is reduced, and the influence on the normal picture display of the display panel 1 is avoided.
It will be appreciated that in this embodiment, a thermal sensor such as a thermistor may be used to detect the temperature of the pixel unit 11, and in other possible embodiments, the temperature of the pixel unit 11 may be detected by other manners, or the temperature may be detected by other components or parts of the display panel 1, which is not limited in this application.
In a possible implementation, referring to fig. 5 again, the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, respectively, the first switch unit 122 is configured to receive the first control sub-signal, and the second switch unit 123 is configured to receive the second control sub-signal.
Specifically, the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, respectively, so that the control circuit 13 can individually control each of the first switch unit 122 and the second switch unit 123 according to the first control sub-signal and the second control sub-signal. It will be appreciated that during operation of the pixel unit 11, the heat generation of the pixel unit 11 may be different from one pixel unit 11 to another, because the time for display, the content of the picture, the brightness, etc. of the pixel unit 11 may be different. For example, a portion of the pixel units 11 may display a still picture with higher brightness for a long time, thereby causing the temperature of the portion of the pixel units 11 to rise faster.
It will be appreciated that in the present embodiment, the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, respectively, so that the driving signals transmitted to the portion of the pixel units 11 can be transmitted individually through the selection path 121, which consumes a large amount of electric power. For the pixel units 11 with the rest of low display brightness and dynamic pictures, the driving signals transmitted to the pixel units 11 can be separately transmitted through the selection paths 121 with low power consumption, so that a better display effect is realized. It will be appreciated that in the present embodiment, the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, respectively, so that the driving signals transmitted to the portion of the pixel units 11 can be transmitted individually through the selection path 121, which consumes a large amount of electric power. For the pixel units 11 with the rest of low display brightness and dynamic pictures, the driving signals transmitted to the pixel units 11 can be separately transmitted through the selection paths 121 with low power consumption, so that a better display effect is realized. For example, when the control circuit 13 generates the first control sub-signal according to the first display signal, the driving signal is transmitted to the pixel unit 11 through the selection path 121 with smaller consumption power, and therefore, when the temperature of the local pixel unit 11 is higher due to the use of the lower refresh rate, the driving signal transmitted to the local pixel unit 11 can be separately transmitted through the selection path 121 with smaller consumption power, so that the temperature of the local pixel unit 11 is quickly reduced, and then the driving signal transmitted to the local pixel unit 11 is transmitted through the selection path 121 with the same consumption power as the driving signal transmitted to other local pixel units 11, so as to achieve a better overall display effect.
In one possible embodiment, please refer to fig. 8, fig. 8 is a schematic diagram of a selection circuit according to another embodiment of the present application. The gates of the first switch unit 122 and the second switch unit 123 are electrically connected, and the gates of the first switch units 122 of different selection circuits 12 are connected in parallel and electrically connected to the control circuit 13, for receiving the first control sub-signal or the second control sub-signal, the first switch unit 122 is turned off according to the second control sub-signal, and the second switch unit 123 is turned off according to the first control sub-signal.
In this embodiment, the first switch unit 122 and the second switch unit 123 are complementary transistors, for example, the first switch unit 122 is an N-Metal-Oxide-Semiconductor (NMOS) transistor, and the second switch unit 123 is a P-Metal-Oxide-Semiconductor (PMOS) transistor; alternatively, the first switch unit 122 is PMOS, and the second switch unit 123 is NMOS. It can be understood that the NMOS is controlled to be turned on by applying a high-level voltage signal to its gate, and is controlled to be turned off by applying a low-level voltage signal to its gate; the PMOS is opposite, and is controlled to turn on by applying a low-level voltage signal to its gate and to turn off by applying a high-level voltage signal to its gate.
Specifically, the first switch unit 122 and the second switch unit 123 are complementary transistors, and the gates of the first switch unit 122 and the second switch unit 123 are electrically connected, so that a transmission line of the control signal can control the conducting states of the first switch unit 122 and the second switch unit 123 at the same time. For example, when the first switch unit 122 is a PMOS, the second switch unit 123 is an NMOS, the first control sub-signal is a high-level voltage signal, and the second control sub-signal is a low-level voltage signal, the first control sub-signal is transmitted to the gates of the first switch unit 122 and the second switch unit 123, so as to control the first switch unit 122 to be turned off and control the second switch unit 123 to be turned on; the second control sub-signal is transmitted to the gates of the first and second switching units 122 and 123, thereby controlling the first switching unit 122 to be turned on and the second switching unit 123 to be turned off.
It can be appreciated that, in the present embodiment, the gates of the first switch units 122 of different selection circuits 12 are connected in parallel and electrically connected to the control circuit 13, and the arrangement manner is such that the control circuit 13 can control the conduction states of all the first switch units 122 and the second switch units 123 only by one transmission line of the control signal, thereby saving the circuit design space.
It will be appreciated that in other possible embodiments, it is also possible that part of the gates of the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, so as to receive the first control sub-signal and the second control sub-signal separately, and the rest of the gates of the first switch unit 122 and the second switch unit 123 are electrically connected in parallel and electrically connected to the control circuit 13, so that the control circuit 13 can locally control part of the first switch unit 122 and the second switch unit 123, and can globally control part of the first switch unit 122 and the second switch unit 123. For example, the pixel units 11 located at the peripheral portion of the display area of the display panel 1 generally display a still picture with high brightness for a long time, and generate a large amount of heat, or the display panel 1 is mounted to an electronic device, and the pixel units 11 disposed corresponding to the processor portion of the electronic device are subjected to high heat generated by the processor via heat conduction, so that the temperature of the pixel units rises too quickly. Therefore, the driving signal transmitted to the portion of the pixel units 11 may be transmitted by individually selecting the selection path 121 through the arrangement manner in which the first switch unit 122 and the second switch unit 123 are electrically connected to the control circuit 13, respectively, so as to effectively reduce the temperature of the display panel 1.
It can be understood that when the control circuit 13 generates the second control sub-signal according to the second display signal, when the driving signal is transmitted to the pixel unit 11 through the selection path 121 with relatively large consumption of electric energy, if the temperature of the local pixel unit 11 rises relatively fast, in order to avoid the transmission of the driving signal to the local pixel unit 11 through the selection path 121 with relatively small consumption of electric energy alone, the display effect of the local pixel unit 11 is obviously different from the display effect of the rest part of the pixel unit 11, and in other possible embodiments, it is also possible to control all the driving signals to be transmitted through the selection path 121 with relatively small consumption of electric energy first, so that the temperature of all the pixel units 11 is reduced rapidly, and then control all the driving signals to be transmitted through the selection path 121 with relatively large consumption of electric energy, so as to improve the display effect of all the pixel units 11.
It should be noted that, when the control circuit 13 generates the first control sub-signal according to the first display signal and the driving signal is transmitted to the pixel unit 11 through the selection path 121 with smaller consumption of electric energy, if the temperature of the pixel unit 11 is still higher locally, in other possible embodiments, all the driving signals may be controlled to be transmitted through the selection path 121 with smaller consumption of electric energy, so that the temperature of all the pixel units 11 is quickly reduced, and all the driving signals are controlled to be transmitted through the selection path 121 with larger consumption of electric energy, so as to improve the display effect of all the pixel units 11.
The application also provides a method for driving a display panel, please refer to fig. 9, fig. 9 is a schematic flow chart of a method for driving a display panel according to an embodiment of the application. The display panel driving method includes steps S901, S902, S903, wherein the steps S901, S902, S903 are described in detail below.
S901, acquiring a control signal and a driving signal;
s902, controlling the corresponding selection channel to be conducted according to the control signal;
s903, transmitting the driving signal to the pixel unit of the display panel through the corresponding selection channel;
wherein the current values of the driving signals transmitted on different ones of the selection paths 121 are different in magnitude.
Specifically, the control signal, the driving signal, the selection path 121, the display panel 1 and the pixel unit 11 refer to the above description, and are not repeated herein.
It can be understood that, in the present embodiment, the pixel unit 11 is driven to operate by the display panel driving method, the driving signals are transmitted to the pixel unit 11 through different selection paths 121, and the pixel unit 11 can be driven to operate by the driving signals with a smaller current value when the temperature of the display panel 1 is higher; when the temperature of the display panel 1 is lower, the pixel unit 11 is driven to work by the driving signal with a larger current value, so that the working capacity of the pixel unit 11 is driven by the driving signal, the temperature of the display panel 1 is effectively reduced, and the risks of polarization, ignition and the like of liquid crystal in the display panel 1 are reduced.
In one possible embodiment, the display panel driving method further includes:
acquiring a first display signal or a second display signal;
generating a first control sub-signal according to the first display signal or generating a second control sub-signal according to the second display signal;
the corresponding selection path 121 is turned on according to the first control sub-signal, or the corresponding selection path 121 is turned on according to the second control sub-signal.
Specifically, the first display signal, the second display signal, the first control sub-signal and the second control sub-signal refer to the above description, and are not described herein again.
In one possible embodiment, the display panel driving method further includes:
dividing the pixel unit 11 into a plurality of detection areas 15;
acquiring a temperature value of the detection area 15 and generating a detection signal;
generating a first control sub-signal or a second control sub-signal according to the detection signal;
the corresponding selection path 121 is turned on according to the first control sub-signal, or the corresponding selection path 121 is turned on according to the second control sub-signal.
Specifically, the detection area 15 and the detection signal refer to the above description, and are not described herein.
Referring to fig. 10, fig. 10 is a schematic top view of an electronic device according to an embodiment of the present application. The electronic device 2 comprises a housing 21 and the display panel 1 as described above, the housing 21 being adapted to carry the display panel 1. Specifically, the display panel 1 is described above, and will not be described herein.
It should be noted that, in the embodiment of the present application, the electronic device 2 may be an electronic device 2 in a mobile phone, a smart phone, a tablet personal computer, an electronic reader, a portable device when worn, a notebook computer, or the like, and may communicate with a data transfer server through the internet, where the data transfer server may be an instant messaging server, an SNS (Social Networking Services, social network service) server, or the like, and the embodiment of the present application is not limited thereto.
The principles and embodiments of the present application are described herein with specific examples applied thereto, the description of the above embodiments being merely for aiding in understanding of the core ideas of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (7)
1. The display panel is characterized by comprising a plurality of pixel units and a plurality of selection circuits, wherein the selection circuits are used for receiving control signals and driving signals, each selection circuit comprises at least two selection channels, and the corresponding selection channels are controlled to be conducted according to the control signals so as to transmit the driving signals to the pixel units through the conducted selection channels, and the pixel units are driven to work; wherein the current values of the driving signals transmitted by different selection paths are different;
the selection circuit comprises a first switch unit, a second switch unit, a first resistor and a second resistor, wherein grid electrodes of the first switch unit and the second switch unit are used for receiving the control signals, the control signals are used for controlling the first switch unit or the second switch unit to be conducted, the first switch unit and the first resistor are connected in series to form one selection passage, and the second switch unit and the second resistor are connected in series to form the other selection passage; the display panel also comprises a control circuit, wherein the control signal comprises a first control sub-signal and a second control sub-signal, and the control circuit is used for receiving a first display signal or a second display signal, generating the first control sub-signal according to the first display signal and generating the second control sub-signal according to the second display signal; the first switch unit is conducted according to the first control sub-signal, and the second switch unit is conducted according to the second control sub-signal; the first display signal has a first frequency, the second display signal has a second frequency, the first frequency is smaller than the second frequency, and the sum of resistance values of each first resistor is smaller than the sum of resistance values of each second resistor.
2. The display panel of claim 1, further comprising a temperature detection circuit for detecting a temperature of the pixel unit and generating a detection signal, the control circuit further for generating the first control sub-signal or the second control sub-signal according to the detection signal.
3. The display panel of claim 1, wherein the first switch unit and the second switch unit are electrically connected to the control circuit, respectively, the first switch unit being configured to receive the first control sub-signal, and the second switch unit being configured to receive the second control sub-signal.
4. The display panel of claim 1, wherein the gates of the first switch unit and the second switch unit are electrically connected, and the gates of the first switch units of different selection circuits are connected in parallel and electrically connected to the control circuit, for receiving the first control sub-signal or the second control sub-signal, the first switch unit being turned off according to the second control sub-signal, and the second switch unit being turned off according to the first control sub-signal.
5. A display panel driving method applied to the display panel according to any one of claims 1 to 4, comprising:
acquiring a driving signal;
acquiring a first display signal or a second display signal;
generating a first control sub-signal according to the first display signal or generating a second control sub-signal according to the second display signal;
the corresponding selection passage is conducted according to the first control sub-signal or the corresponding selection passage is conducted according to the second control sub-signal;
transmitting the driving signals to the pixel units of the display panel through the corresponding selection channels;
wherein the current values of the driving signals transmitted by different selection paths are different.
6. The display panel driving method according to claim 5, wherein the display panel driving method further comprises:
dividing the pixel unit into a plurality of detection areas;
acquiring a temperature value of the detection area and generating a detection signal;
generating a first control sub-signal or a second control sub-signal according to the detection signal;
and conducting the corresponding selection passage according to the first control sub-signal or conducting the corresponding selection passage according to the second control sub-signal.
7. An electronic device comprising a housing and the display panel of any one of claims 1-4, the housing being configured to carry the display panel.
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| CN115424591A (en) | 2022-12-02 |
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