CN113470579A - Display device, driving method, storage medium, and terminal - Google Patents
Display device, driving method, storage medium, and terminal Download PDFInfo
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- CN113470579A CN113470579A CN202110750752.XA CN202110750752A CN113470579A CN 113470579 A CN113470579 A CN 113470579A CN 202110750752 A CN202110750752 A CN 202110750752A CN 113470579 A CN113470579 A CN 113470579A
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
The invention discloses a display device and a driving method thereof. The display device includes: a display panel including a substrate including a display area and a non-display area surrounding the display area, the display area having a plurality of pixel units connected to a plurality of data lines disposed thereon; the image display processor outputs a plurality of data signals, the data signals drive a plurality of pixel units through a plurality of data lines respectively, a temperature sensor is arranged at a position adjacent to the image display processor, and the temperature sensor is electrically connected with the image display processor; the image display processor acquires corresponding temperature parameter values according to the temperature signals provided by the temperature sensor, calls the gamma values and the Demura brightness compensation parameter values which are stored in advance and correspond to different temperatures, and adjusts data signals according to the gamma values and the Demura brightness compensation parameter values corresponding to different temperatures so as to prevent the display quality of the OLED display device from being influenced by temperature changes and improve the display effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device, a driving method thereof, a storage medium, and a terminal.
Background
An Active Matrix Organic Light Emitting Diode (AMOLED) display device is a flat panel display device that controls an Organic Light Emitting Diode (OLED) to display an image using a Thin Film Transistor (TFT), and has many advantages of self-luminescence, low driving voltage, high light emitting efficiency, short response time, high definition and contrast, a large viewing angle, a wide range of use temperature, and capability of realizing flexible display and large-area full-color display, and is widely used in electronic devices such as mobile phones.
In the conventional AMOLED display panel, the characteristics of the TFT and the OLED are changed along with the change of the temperature of the screen body. Therefore, as the screen dot time increases, the temperature of the screen body near the side where the image display processor is installed increases rapidly due to the heat generated by the image display processor, and the electrical characteristics of the TFT change due to the heat, so that the current supplied to the OLED changes. Moreover, since the OLED light emitting device generally includes three light emitting devices with different light emitting colors, namely red, green, and blue, and the light emitting efficiency of the red OLED, the green OLED, and the blue OLED varies inconsistently with the temperature variation, the display of the screen is uneven or the color shift is easily caused, for example, the low gray scale screen is red.
Disclosure of Invention
In view of the above-mentioned problems, an embodiment of the present invention provides a display device, including:
the display panel comprises a substrate, wherein pixel units are arranged on the substrate;
the temperature sensor senses the temperature of the display panel and outputs a corresponding temperature signal;
an image display processor including a data driving unit and a compensation unit;
the compensation unit acquires corresponding temperature parameter values according to temperature signals output by the temperature sensor, and pre-stored gamma values and brightness compensation parameter values corresponding to different temperatures are acquired according to the temperature parameter value information;
the data driving unit adjusts data signals according to gamma values corresponding to different temperatures and brightness compensation parameter values and outputs the data signals to the pixel units;
the image display processor is arranged to overlap with the display panel in a thickness direction of the display panel.
In other alternative embodiments, the temperature sensor is disposed on a side of the substrate away from the light exiting the pixel unit.
In other alternative embodiments, the temperature sensors include at least two temperature sensors; the temperature parameter value is an average temperature value or a maximum value of the temperature signals transmitted by the at least two temperature sensors.
In other optional embodiments, the image display processor compares the temperature parameter value with a first set threshold, and determines whether the data signal needs to be adjusted according to the comparison result;
when the temperature parameter value is lower than or equal to a first set threshold value, an image display processor, wherein the data signal adopts an original data signal;
when the temperature parameter value is higher than a first set threshold value, the image display processor calls corresponding gamma value and brightness compensation parameter value to adjust the data signal.
In other optional embodiments, the image display processor compares the temperature parameter value with a second set threshold, and determines whether the data signal needs to be adjusted according to the comparison result;
when the temperature parameter value is higher than a first set threshold value and lower than or equal to a second set threshold value, calling a first group of gamma values and brightness compensation parameter values to adjust the data signal;
and when the temperature parameter value is higher than a second set threshold value, a second group of gamma values and brightness compensation parameter value parameter values are taken to adjust the data signal.
In other alternative embodiments, the second set threshold is 5 to 15 degrees celsius higher than the first set threshold.
According to a second aspect of the embodiments of the present invention, there is also provided a driving method of a display device, the method including:
acquiring the temperature of the display panel at the position adjacent to the image display processor and generating a temperature signal;
converting the temperature signal into a temperature parameter value;
according to the temperature parameter values, pre-stored gamma values corresponding to different temperatures and brightness compensation parameter values are taken;
and adjusts the data signal according to the gamma value and the brightness compensation parameter value and outputs the adjusted data signal.
According to a third aspect of embodiments of the present invention, there is provided a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the above-described method embodiments.
According to a fourth aspect of the embodiments of the present invention, there is provided a terminal, comprising a memory and a processor, the memory having a computer program stored thereon, the processor implementing the steps in the above-mentioned method embodiments when executing the computer program on the memory.
In the display device and the driving method thereof provided by the embodiment of the invention, the temperature of the display panel is monitored in real time by adding the temperature sensor at the position close to the image display processor, the Gamma value (Gamma) of the corresponding temperature interval is called in real time according to the acquired temperature of the display panel, the compensation parameter value of display unevenness (Demura) is eliminated, the temperature compensation is carried out on the corresponding screens at the two ends of the image display processor, the problems of display unevenness, low gray scale color cast and the like caused by temperature rise are eliminated by adjusting the data signals, and the display effect of the screen images is improved.
Drawings
FIG. 1 is a graph of voltage versus luminance for OLED devices at different temperatures;
FIG. 2 is a top view of a display device in an expanded state according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a display device after bending according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a pixel unit of a display device according to an embodiment of the present invention;
fig. 5 is a top view of a display device according to a second embodiment of the present invention in an unfolded state;
fig. 6a and 6b are cross-sectional views of display devices provided in a third embodiment and a fourth embodiment of the present invention, respectively;
fig. 7 is a top view of a display device according to a fifth embodiment of the present invention in an unfolded state;
fig. 8 is a flowchart of a display driving method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and that no limitation of the invention is intended. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Through the experiment of researchers, the luminance of the OLED light-emitting device in the display panel changes under the same voltage along with the temperature change of the display panel, particularly along with the temperature rise. FIG. 2 is a graph showing the relationship between the voltage applied across the OLED device and the luminance at different temperatures. As can be seen from fig. 2, the higher the temperature, the higher the light emission luminance of the OLED light emitting device at the same voltage. And the change range of the luminance of the red, green and blue OLED light-emitting devices at different temperatures is different, so that the problems of color cast and uneven display of the display area due to the temperature change are caused. Besides that the variation of the luminous efficiency of the OLED devices with different colors is inconsistent with the variation of temperature, the variation of the characteristics of the TFT devices with the variation of temperature can also cause the variation of the input current of the OLED devices, thereby further aggravating the problems of white picture color cast and uneven display images in the display area.
Fig. 2 and 3 are a top view and a cross-sectional view after bending of a display device according to an embodiment of the present invention, and referring to fig. 2, the display device includes:
an organic light emitting diode display panel including a substrate 10, the substrate 10 including a display area AA and a non-display area NA surrounding the display area, the display area AA having a plurality of pixel units 20 disposed thereon and connected to a plurality of data lines 21;
an image display processor 11, the image display processor 11 generating a plurality of data signals, the plurality of data signals respectively driving the plurality of pixel units 20 through a plurality of data lines, the image display processor 11 being provided with a first temperature sensor 131 and a second temperature sensor 132 at both ends thereof, respectively, the first temperature sensor 131 and the second temperature sensor 132 being connected to the image display processor;
the image display processor obtains corresponding temperature parameter values according to the temperature signals provided by the first temperature sensor 131 and the second temperature sensor 132, retrieves a set of pre-stored gamma values and Demura brightness compensation parameter values at corresponding temperatures, and adjusts the data signals according to the gamma values and the Demura brightness compensation parameter values. Therefore, the Demura compensation is carried out on the screen body, and the problems of color cast and uneven display caused by inconsistent brightness change of the OLED device and overlarge input current of the OLED device due to temperature change are solved.
Referring to fig. 3, in order to reduce the bezel of the display device to implement a narrow bezel design, the image display processor overlaps the display panel in the thickness direction of the display panel. Specifically, the image display processor is bent and attached to one side of the substrate, which is far away from the light emitting side of the pixel unit.
In the present embodiment, referring to fig. 2 and 3, specifically, the display device further includes a circuit board 12, the image display processor 11 is disposed on the circuit board 12, the circuit board 12 is connected to the image display processor 11, and the image display processor 11 outputs a driving signal, which includes a data signal and other control signals, and transmits the driving signal to the OLED display panel through the circuit board 12. In this embodiment, the circuit board 12 may be a flexible circuit board 12. The first temperature sensor 131 and the second temperature sensor 132 are disposed on the circuit board and located near both ends of the image display processor 11, for sensing a temperature value of the OLED display panel near the image display processor 11.
In this embodiment, a plurality of sets of gamma values and Demura compensation parameter values corresponding to different temperature intervals are stored in the memory module, and a set of gamma values and Demura compensation parameter values corresponding to the temperature intervals are called according to temperature data collected and fed back by the temperature sensor in real time during the period that the OLED display device displays images, so that the screen display effect is improved.
In this embodiment, the temperature sensor may be an integrated temperature sensor, and more specifically, for example, a PN junction temperature sensing element and an electronic circuit are integrated on a silicon chip and packaged by utilizing a relationship between a current and voltage relationship characteristic of a PN junction of a transistor and a temperature. The temperature sensor converts the temperature change into a relevant current analog signal or voltage analog signal, and the electric signal which changes along with the temperature change is output to the image display processor as a temperature signal.
It should be noted that the number of the temperature sensors is not limited in the present invention, and the number of the temperature sensors may be set to 1 or more. The image display processor may be a single integrated circuit chip in which a plurality of functional blocks such as the data driving unit and the compensation unit are integrated, or may be constituted by a plurality of sub-chips that execute the respective functional blocks.
Fig. 4 is a circuit schematic diagram of the pixel unit 20 of the display device according to the embodiment shown in fig. 2. Referring to fig. 4, the pixel circuit includes: a driving transistor MD, a first switching transistor M1, a second switching transistor M2, a third switching transistor M3, a fourth switching transistor M4, a fifth switching transistor M5, and a storage capacitor Cst. The driving transistor MD is used for driving the light-emitting device OLED to emit light; the storage capacitor Cst is connected between the first power input terminal VDD and the gate of the driving transistor MD, and is used for storing the driving voltage of the gate of the driving transistor MD; the first switching transistor M1 is connected between the DATA signal input terminal DATA and the first pole of the driving transistor MD, and the first switching transistor M1 is turned on under the control of the first scan signal to apply the DATA signal to the first pole of the driving transistor MD. The second switching transistor M2 is connected between the first power input terminal VDD and the driving transistor MD; the second switching transistor M2 is used to be turned on under the control of the light emission control signal to apply the first power to the first pole of the driving transistor MD. The third switching transistor M3 is connected between the driving transistor MD and the light emitting device OLED; the third switching transistor M3 is used to conduct under the control of the light emitting control signal, and conduct the driving current of the driving transistor MD to the light emitting device OLED. The fourth switching transistor M4 is connected between the second pole and the gate of the driving transistor MD; the first switching transistor M1 and the fourth switching transistor M4 are turned on under the control of the first scan signal S1, and the data signal is corrected and written into the gate of the driving transistor MD. The fifth switching transistor M5 is connected between the reference voltage input terminal Vref and the gate of the driving transistor MD; the fifth switching transistor M5 is used to turn on under the control of the second scan signal S2, and transmits the reference voltage Vref to the gate of the driving transistor MD.
In this embodiment, the display device is provided with a plurality of temperature sensors, the image display processor receives the temperature signal transmitted by each temperature sensor, because the positions of the temperature sensors are different, the temperature signals collected by each temperature sensor may be different, the image display processor may take the average value of each temperature signal as a temperature parameter value, a corresponding set of gamma value and Demura brightness compensation parameter value are called according to the temperature parameter value, the gamma value and the Demura supplement signal are superposed to obtain an adjusted data signal, and the adjusted data signal is output to the respective data line to drive the pixel unit on each data line. In other embodiments, the temperature sensor may also take the highest temperature as a temperature parameter value, call a corresponding set of gamma values and Demura brightness compensation parameter values according to the highest temperature, superimpose the gamma values and Demura supplemental signals to obtain adjusted data signals, and output the adjusted data signals to respective data lines.
Specifically, in this embodiment, since the pixel unit located on the side of the display area away from the image display processor is less affected by the temperature rise of the device caused by the temperature rise of the image display processor, in order to increase the processing speed of the image display processor, the image display processor may only adjust the data signal corresponding to the pixel unit on the side adjacent to the image display processor, but not adjust the data signal corresponding to the pixel unit on the side away from the image display processor, and the pixel unit on the side away from the image display processor is still driven by the original data signal. In other embodiments, the image display processor may also adjust the data signals of the pixel units in the whole display area according to the fed back temperature change.
In this embodiment, the image display processor compares the temperature parameter value with a first set threshold, and determines whether the data signal needs to be adjusted according to the comparison result; when the temperature parameter value is lower than or equal to a first set threshold value, the image display processor does not adjust the data signal and still adopts the original data signal; when the temperature parameter value is higher than a first set threshold value, the image display processor calls a corresponding set of gamma curves and Demura brightness compensation parameter values to adjust the data signals. Since the color shift problem of the OLED display panel caused by the temperature is more serious when the temperature is higher than 30 ℃, it is preferable that the first set threshold is between 30 ℃ and 35 ℃. In this way, whether different gamma values and Demura brightness compensation parameter values are called is determined according to the temperature change of the OLED display panel and the amplitude of the temperature change, so that the uniformity of the displayed image is improved.
In this embodiment, in order to perform more accurate temperature compensation on the display screen, it is further preferable that the image display processor compares the temperature parameter value with a second set threshold, and determines whether the data signal needs to be adjusted according to the comparison result; when the temperature parameter value is higher than a first set threshold value and lower than a second set threshold value, a first group of gamma curves and Demura brightness compensation parameter values are taken to adjust the data signals; and when the temperature parameter value is higher than a second set threshold value, a second group of gamma curves and the Demura brightness compensation parameter value are taken to adjust the data signal. Preferably, the second set threshold is 5 ℃ to 10 ℃ higher than the first set threshold.
In other embodiments, more than two sets of gamma values and Demura brightness compensation parameter values may be set. For example, 7 sets of gamma values and Demura brightness compensation parameter values are pre-stored in 7 temperature ranges of less than 10 ℃, 10 ℃ to 20 ℃, 20 ℃ to 30 ℃, 30 ℃ to 40 ℃, 40 ℃ to 50 ℃, 50 ℃ to 60 ℃ and more than 60 ℃ respectively according to the different changes of the red, green and blue OLED luminous efficiency. When the OLED display panel is actually used, the corresponding gamma value and the compensation signal are called according to the temperature data fed back by the temperature sensor, so that the display panel displays the gray-scale value with correct brightness in different temperature intervals, and the screen body picture display effect is improved.
It should be noted that the temperature interval and the number of sets of gamma and Demura brightness compensation parameter values can be adjusted according to specific requirements. When the temperature interval is smaller, the set number of the gamma value and the Demura brightness compensation parameter value is larger, the adjustment of the data signal is more accurate, but the amount of data to be processed by the image display processor is increased, thereby affecting the processing speed of the image display processor. Therefore, the temperature interval should not be too small, and the corresponding gamma value and the number of sets of Demura brightness compensation parameter values should not be too large. Preferably, the corresponding gamma value and Demura brightness compensation parameter values may be set to 2 to 8 groups according to the change of temperature.
In the second embodiment, referring to fig. 5, in order to more accurately sense the temperature of the pixel unit 20 on the display panel, the first temperature sensor 131 and the second temperature sensor 132 may also be disposed on the OLED display panel. Specifically, the temperature sensor may be located in the display area AA of the substrate, or may be located in the non-display area NA of the substrate, which is not limited in the present invention.
Fig. 6a and 6b are sectional views of display devices provided in a third embodiment and a fourth embodiment of the present invention. In the third embodiment, referring to fig. 6a, in order to reduce the frame of the display device and realize a narrow frame design, the circuit board 12 is bent and attached to the side of the substrate away from the light emitting side of the pixel unit. The temperature sensor is arranged on one side of the substrate, which is far away from the light emitting side of the pixel unit. Preferably, the temperature sensor is located between the image display processor and the display panel in a thickness direction of the display panel, and a vertical projection of the temperature sensor on the display panel and a vertical projection of the image display processor on the display panel overlap each other. Therefore, the temperature of the pixel unit of the OLED display panel close to the image display processor 11 can be sensed more accurately, and the normal light emission of the pixel unit is not influenced. Alternatively, referring to fig. 6a, the temperature sensors may include a first temperature sensor 131 and a second temperature sensor 132, which are disposed on the side of the substrate away from the light emitted from the pixel unit and near both ends of the image display processor 11.
In a fourth embodiment, as shown with reference to fig. 6b, the substrate 10 may be flexible, bendable, foldable or rollable. In order to realize the narrow frame design, the sub-region SA of the substrate 10 can be bent and attached to the side of the main region MA of the substrate 10 away from the light emitting side of the pixel unit. In this embodiment, the image display processor may be directly disposed on the sub-area SA of the substrate 10, and the first temperature sensor 131 and the second temperature sensor 132 may be disposed on the side of the main area MA of the substrate 10 away from the light emitted from the pixel units and located at two ends close to the image display processor 11, so as to accurately monitor the temperature of the pixel units close to the image display processor 11 and avoid uneven display brightness caused by temperature variation.
In the fifth embodiment, referring to fig. 7, a plurality of temperature sensors are uniformly distributed on a side of the image display processor close to the OLED display panel, and the temperature sensors are used for detecting the temperatures of the respective corresponding regions. Specifically, in other embodiments, the temperature sensors may be three, five, or six as long as sufficient space is ensured for disposing the temperature sensors.
Fig. 8 is a flowchart of a display driving method according to an embodiment of the present invention. The driving method may include:
acquiring the temperature of the display panel at the position adjacent to the image display processor and outputting a temperature signal; converting the temperature signal into a temperature parameter value; according to the temperature parameter values, pre-stored gamma values corresponding to different temperatures and Demura brightness compensation parameter values are taken; and finally, adjusting the data signals according to the gamma voltage and the Demura brightness compensation parameter values so that the OLED display panel can normally work at different temperatures, and effectively avoiding the change of the luminous current and the luminous brightness of the OLED display device caused by the temperature change of the image display processor side of the display, thereby avoiding the problem of color cast or improving the uniformity of the displayed image.
In summary, in the display device and the driving method provided by the embodiments of the invention, since the data signal can be adjusted according to the current temperature information of the display device, especially the temperature change of the pixel unit caused by the temperature change of the image display processor, the problem of poor effect of the display device in the related art is avoided, and the display effect of the display device is effectively improved.
Embodiments of the present invention further provide a storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method shown in fig. 8. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include, but is not limited to, ROM, RAM, magnetic or optical disks, and the like.
An embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes the steps of the driving method shown in fig. 8 when executing the computer instruction. The terminal may be a computer, a tablet computer, a mobile phone, and other terminal devices, but is not limited thereto.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM) which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
All the above-mentioned optional technical solutions can be combined arbitrarily to form the optional embodiments of the present invention, and are not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display device, comprising:
the display panel comprises a substrate, wherein pixel units are arranged on the substrate;
the temperature sensor senses the temperature of the display panel and outputs a corresponding temperature signal;
an image display processor including a data driving unit and a compensation unit;
the compensation unit acquires corresponding temperature parameter values according to the temperature signals, and pre-stored gamma values and brightness compensation parameter values corresponding to different temperatures are called according to the temperature parameter value information;
the data driving unit adjusts data signals according to gamma values corresponding to different temperatures and brightness compensation parameter values and outputs the data signals to the pixel units;
the image display processor overlaps the display panel in a thickness direction of the display panel.
2. The display device according to claim 1, wherein the temperature sensor is disposed on a side of the substrate away from light exiting the pixel unit.
3. The display device according to claim 1, wherein the temperature sensor includes at least two temperature sensors; the temperature parameter value is an average temperature value or a maximum temperature value of the temperature signals transmitted by the at least two temperature sensors.
4. The display device according to claim 1, wherein a vertical projection of the temperature sensor on the display panel and a vertical projection of the image display processor on the display panel overlap each other.
5. The display device according to claim 1, wherein the image display processor compares the temperature parameter value with a first set threshold value, and determines whether the data signal needs to be adjusted according to the comparison result;
when the temperature parameter value is lower than or equal to a first set threshold value, the data signal adopts an original data signal;
when the temperature parameter value is higher than a first set threshold value, the image display processor calls corresponding gamma value and brightness compensation parameter value to adjust the data signal.
6. The display device according to claim 5, wherein the image display processor compares the temperature parameter value with a second set threshold value, and determines whether the data signal needs to be adjusted according to the comparison result;
when the temperature parameter value is higher than a first set threshold value and lower than or equal to a second set threshold value, the image display processor calls a first group of gamma values and brightness compensation parameter value parameter values to adjust the data signals;
and when the temperature parameter value is higher than a second set threshold value, a second group of gamma values and brightness compensation parameter values are taken to adjust the data signals.
7. The display device according to claim 6, wherein the second set threshold is 5 to 15 degrees celsius higher than the first set threshold.
8. A driving method of a display device, applied to the display device according to any one of claims 1 to 7, the method comprising:
acquiring the temperature of the display panel at the position adjacent to the image display processor and outputting a temperature signal;
converting the temperature signal into a temperature parameter value;
according to the temperature parameter values, pre-stored gamma values corresponding to different temperatures and brightness compensation parameter values are retrieved;
and adjusts the data signal according to the gamma value and the brightness compensation parameter value and outputs the data signal.
9. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, performing the method steps of claim 8.
10. A terminal comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the computer program on the memory, is adapted to carry out the steps of the method of claim 8.
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