A display control method and display device

Abstract

The present application discloses a control method and a display device for a display, wherein the control method for the display obtains the ambient temperature of the display and determines whether the ambient temperature changes from a first temperature value to a second temperature value; when the ambient temperature changes from the first temperature value to the second temperature value, the display is controlled to insert a frame of a completely black picture; a target compensation voltage corresponding to the second temperature value is obtained, and the display is controlled according to the target compensation voltage; the present application can alleviate the current problem of flickering of the display screen.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display control method and a display device. Background Art

[0002] The transistor electrodes in the display will have different changes in response to external temperature changes. At low temperatures, the Ion of the thin-film transistor device will be lower, and insufficient pixel opening will lead to insufficient local charging, which will cause abnormal images. The conventional solution is to add a temperature compensation circuit to the Tcon drive circuit, identify the ambient temperature through the thermistor, and control the output of different gate turn-on voltages VGH to increase the charging rate of the pixel here, so that the picture is displayed normally. However, since thermistors are usually sensitive to temperature, unstable compensation voltages will appear, and the corresponding gate turn-on voltage will be unstable, which will cause the problem of screen flickering. Summary of the invention

[0003] The present application provides a display control method and a display device, which can alleviate the current problem of display screen flickering.

[0004] The present application provides a method for controlling a display, the method comprising:

[0005] Acquire the ambient temperature of the display, and determine whether the ambient temperature changes from a first temperature value to a second temperature value;

[0006] When the ambient temperature changes from the first temperature value to the second temperature value, the display is controlled to insert and display a frame of completely black picture;

[0007] A target compensation voltage corresponding to the second temperature value is obtained, and the display is controlled according to the target compensation voltage.

[0008] In some embodiments, the control method of a display further includes:

[0009] When the ambient temperature is a first temperature value, a driving voltage corresponding to the first temperature value is obtained, and the display is controlled according to the driving voltage.

[0010] In some embodiments, the method for controlling a display further comprises, after the step of controlling the display to display according to the target compensation voltage:

[0011] When the ambient temperature changes from the second temperature value to the first temperature value, controlling the display to insert and display a frame of completely black picture;

[0012] A driving voltage corresponding to the first temperature value is obtained, and the display is controlled according to the driving voltage.

[0013] In some embodiments of the display control method, the difference between the first temperature value and the second temperature value is greater than a preset temperature value.

[0014] In some embodiments of the display control method, the second temperature value is greater than the first temperature value.

[0015] In some embodiments, the display control method further includes: pre-storing a plurality of preset temperature values ​​and a plurality of preset compensation voltages that are mapped to the preset temperature values.

[0016] In some embodiments, the method for controlling a display, obtaining a target compensation voltage corresponding to a second temperature value includes:

[0017] A preset temperature that is the same as the second temperature value among the plurality of preset temperature values ​​is searched, and a preset compensation voltage corresponding to the preset temperature is used as a target compensation voltage.

[0018] An embodiment of the present application further provides a display device, which includes a control module and a display, wherein the control module is electrically connected to the display, and the control module is used to execute the above-mentioned control method.

[0019] In some embodiments of the display device, the control module includes a temperature detection module, a power management integrated module and a controller connected in sequence;

[0020] The temperature detection module is used to obtain the ambient temperature of the display, and convert the ambient temperature into a corresponding voltage value and output it to the power management integrated module; the power management integrated module is used to feed back the voltage value to the controller;

[0021] The controller is used to determine that the ambient temperature changes from a first temperature value to a second temperature value when the voltage value changes from a first voltage value to a second voltage value, and to control the display to insert a frame of completely black picture, and to control the power management integrated module to output a corresponding target compensation voltage to the display according to the second temperature value.

[0022] In some embodiments of the display device, the voltage value is negatively correlated with the ambient temperature.

[0023] The present application provides a display control method and display device, wherein the display control method detects the ambient temperature of the display, and when the ambient temperature of the display changes from a first temperature value to a second temperature value, in order to avoid the flickering problem caused by the change in the gate-on voltage caused by the temperature change, the corresponding control display inserts a black frame to transition the screen flickering phenomenon. Afterwards, the target compensation voltage corresponding to the second temperature value is obtained, and the target compensation voltage is used as the gate-on voltage to control the display display, thereby avoiding the gate-on voltage from fluctuating with the change in the ambient temperature, so as to further alleviate the screen flickering problem of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0025] Figure 1 This is a flowchart of the first embodiment of the display control method provided in the embodiments of the present application.

[0026] Figure 2 This is a flowchart of the second embodiment of the display control method provided in the embodiment of the present application.

[0027] Figure 3 A schematic diagram of the relationship between temperature value and target compensation voltage in the display control method provided in an embodiment of the present application.

[0028] Figure 4 This is a structural block diagram of a display device provided in an embodiment of the present application.

[0029] Figure 5 This is a structural block diagram of a temperature detection module in a display device provided in an embodiment of the present application.

[0030] Figure 6 A schematic diagram of the relationship between time and voltage value in a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0033] See also Figure 1 This embodiment provides a method for controlling a display, the control method comprising:

[0034] 100. Obtaining the ambient temperature of the display, and determining whether the ambient temperature changes from a first temperature value to a second temperature value;

[0035] 200. When the ambient temperature changes from the first temperature value to the second temperature value, the display is controlled to insert and display a frame of completely black picture;

[0036] 300. Obtain a target compensation voltage corresponding to a second temperature value, and control a display according to the target compensation voltage.

[0037] In this application, after the display is started, the ambient temperature of the display is detected in real time. When the ambient temperature of the display changes from the first temperature value to the second temperature value, in order to alleviate the flickering problem caused by the change in the gate-on voltage caused by the temperature change, the corresponding control display is inserted to display a frame of a completely black picture, that is, a black frame is inserted to transition the picture flickering phenomenon. Afterwards, the target compensation voltage corresponding to the second temperature value is obtained, and the target compensation voltage is fixed as the gate-on voltage to control the display display, which avoids the gate-on voltage from fluctuating with the change in ambient temperature, and can further alleviate the picture flickering problem of the display.

[0038] In some embodiments, the control method further includes: when the ambient temperature is a first temperature value, obtaining a driving voltage corresponding to the first temperature value, and controlling the display according to the driving voltage. When it is detected that the ambient temperature of the display has not changed from the first temperature value to the second temperature value, that is, the ambient temperature of the display corresponds to the first temperature value, then obtaining a driving voltage corresponding to the first temperature value, and directly fixing the driving voltage as the gate-on voltage, thereby alleviating the problem of display screen flickering caused by the instability of the gate-on voltage.

[0039] See also Figure 2 In some embodiments, after step 300, the method further includes:

[0040] 400. When the ambient temperature changes from the second temperature value to the first temperature value, control the display to insert and display a frame of completely black picture;

[0041] 500. Obtain a driving voltage corresponding to a first temperature value, and control a display according to the driving voltage.

[0042] When the ambient temperature of the display changes from the first temperature value to the second temperature value, a frame of black screen is inserted to control the display to transition the screen flickering phenomenon, and then the gate-on voltage is fixed as the target compensation voltage to alleviate the flickering phenomenon of the display caused by the fluctuation of the gate-on voltage. When the ambient temperature of the display changes from the second temperature value to the first temperature value again, in order to adapt to the change of the temperature value, the driving voltage corresponding to the first temperature value is obtained as the gate-on voltage to control the display of the display. At the same time, in order to alleviate the flickering phenomenon caused by the change of the gate-on voltage, the display will also be controlled to insert a frame of black screen to transition the screen flickering phenomenon.

[0043] In some embodiments, the difference between the first temperature value and the second temperature value is greater than a preset temperature value. For example, the difference between the first temperature value and the second temperature value is greater than 25°C. When the ambient temperature of the display changes by a certain value, the display is controlled to insert a frame of a completely black screen to transition the screen flickering phenomenon, and a corresponding target compensation voltage is provided according to the second temperature value at the same time. The target compensation voltage is used as a gate-on voltage to control the display display to alleviate the screen flickering phenomenon of the display.

[0044] See also Figure 3 As an embodiment, the second temperature value T2 is greater than the first temperature value T1. Figure 3 As shown in point A, the second temperature value T2 is room temperature such as 25°C. Figure 3 As shown at point B, the first temperature value T1 is minus 1°C. At this time, the low temperature compensation starts after the display is started in a low temperature environment, and the change in ambient temperature will cause the change in the compensation voltage and thus make the gate turn-on voltage unstable, causing the display screen to flicker. In this embodiment, after the low temperature compensation is started, when the ambient temperature of the display changes to the second temperature value such as normal temperature, the display is controlled to insert a frame of all-black picture to transition the flickering phenomenon of two adjacent frames. At the same time, using the target compensation voltage corresponding to the second temperature value T2, such as VGH_HT, as the gate turn-on voltage is equivalent to providing a fixed gate turn-on voltage for the display, thereby alleviating the screen flickering problem that occurs after the low temperature compensation of the display is started.

[0045] If it is detected that the ambient temperature of the display has not changed from the first temperature value T1 to the second temperature value T2, that is, the ambient temperature value corresponds to the first temperature value T1, then the display is controlled according to the driving voltage corresponding to the first temperature value T1, such as VHG_LT. That is, when the ambient temperature of the display is between the first temperature value T1 and the second temperature value T2, the gate-on voltage is fixed to the driving voltage, and when the ambient temperature of the display changes to the second temperature value T2, the gate-on voltage is fixed to the target compensation voltage, thereby alleviating the display screen flickering problem caused by the instability of the gate-on voltage.

[0046] As an embodiment, the control method further includes: pre-storing a plurality of preset temperature values ​​and a plurality of preset compensation voltages that are mapped to the preset temperature values. In this embodiment, obtaining a target compensation voltage corresponding to the second temperature value includes: searching for a preset temperature that is the same as the second temperature value among a plurality of preset temperature values, and using a preset compensation voltage corresponding to the preset temperature as a target compensation voltage. In this embodiment, a plurality of preset temperatures are pre-set, and there is a target compensation voltage corresponding to each preset temperature. Then, when actually detecting the ambient temperature of the display, when the ambient temperature changes from the first temperature value to the second temperature value, the preset temperature that is the same as the second temperature value among a plurality of preset temperatures is obtained, and the compensation voltage corresponding to the preset temperature is used as the target compensation voltage, so as to provide a corresponding gate-on voltage for the display.

[0047] In the present application, a black frame is inserted between two adjacent display frames according to the change in the ambient temperature of the display, so that the human eye perceives smoother switching between frames, thereby alleviating the problem of flickering of the display screen after low temperature compensation is activated.

[0048] An embodiment of the present application also provides a display device, which includes a control module and a display, wherein the control module is electrically connected to the display, and the control module is used to execute the control method of the above-mentioned display. Since the control method of the display is described in detail above, it will not be repeated here.

[0049] The display device in the present application detects the ambient temperature of the display when controlling the display. When the ambient temperature of the display changes from a first temperature value to a second temperature value, in order to avoid the flickering problem caused by the change in the gate-on voltage due to the temperature change, the corresponding control display inserts a black frame to transition the screen flickering phenomenon. Afterwards, the target compensation voltage corresponding to the second temperature value is obtained, and the target compensation voltage is fixed as the gate-on voltage to control the display, thereby avoiding the gate-on voltage from fluctuating with the change in the ambient temperature, further alleviating the screen flickering problem of the display, and improving the reliability of the display device.

[0050] See also Figure 4Specifically, the control module 11 includes a temperature detection module 111, a power management integrated module 112 and a controller 113 which are connected in sequence. The temperature detection module 111 is used to obtain the ambient temperature of the display 12, and convert the ambient temperature into a corresponding voltage value and output it to the power management integrated module 112; the power management integrated module 112 is used to feed back the voltage value to the controller 113; the controller 113 is used to judge that the ambient temperature changes from the first temperature value to the second temperature value when the voltage value changes from the first voltage value to the second voltage value, and control the display 12 to insert a frame of a completely black picture, and control the power management integrated module to output a corresponding target compensation voltage to the display 12 according to the second temperature value, so as to control the display 12 to display the corresponding picture.

[0051] Please also read Figure 5 and Figure 6 In this embodiment, the temperature detection module 111 includes an NTC thermistor R NTC , the corresponding voltage value is negatively correlated with the ambient temperature; the temperature detection module 111 also includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to a voltage such as VDD3.3V, and the other end of the first resistor R1 is connected to an NTC thermistor R NTC Connect, NTC thermistor R NTC The NTC thermistor is also connected to one end of the second resistor R2, one end of the second resistor R2 is connected to the power management integrated module 112, and the other end of the second resistor R2 is grounded. The power management integrated module 112 detects the voltage value of the NTC thermistor. Figure 5 The VNTC in the controller 113 is sent to the controller 113. When the controller 113 recognizes that the voltage value changes from the first voltage value VTCH to the second voltage value VTCL, it determines that the ambient temperature changes from the first temperature value to the second temperature value. During the judgment process, the controller 113 can directly obtain the two voltage values ​​in real time for comparison and then identify the change of the ambient temperature. It can also detect the voltage change within a certain period of time, such as Figure 6 As shown in the curve b in FIG, if the voltage change amount during the time from t1 to t2 is greater than ΔV, the compensation scheme is started, the display 12 is controlled to insert a frame of full black screen display, and the gate opening voltage is controlled to be the target compensation voltage when the next frame is displayed; wherein, the change amount during the time from t1 to t2 is Δt, such as Δt can be 0.1s or 0.2s, etc., which can be set according to actual needs; Figure 6 As shown in curve a, if the voltage change during the time from t1 to t2 is less than ΔV, it can be considered that the ambient temperature of the display 12 has not changed from the first temperature value to the second temperature value, and still corresponds to the first temperature value. The driving voltage corresponding to the first temperature value is used as the gate turn-on voltage to control the display 12 to display.

[0052] In the present application, the existing temperature compensation circuit is utilized. When it is recognized that the ambient temperature changes from a first temperature value to a second temperature value, a corresponding black frame display is inserted, so that the human eye perceives smoother switching between frames, thereby alleviating the problem of screen flickering of the display 12 after the low temperature compensation is started; thereafter, the target compensation voltage corresponding to the second temperature value is obtained, and the target compensation voltage is fixed as the gate turn-on voltage to control the display of the display 12, thereby avoiding the gate turn-on voltage from fluctuating with changes in ambient temperature, which can further alleviate the screen flickering problem of the display 12 and improve the reliability of the display device.

[0053] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0054] The above is a detailed introduction to the control method of the display provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A method for controlling a display, characterized in that: The control method comprises: When the low temperature compensation of the display is started, the ambient temperature of the display is obtained, and it is determined whether the ambient temperature changes from a first temperature value to a second temperature value; the second temperature value is greater than the first temperature value, the second temperature value is a normal temperature, and the difference between the first temperature value and the second temperature value is greater than a preset temperature value; When the ambient temperature is the first temperature value, a driving voltage corresponding to the first temperature value is obtained, and the driving voltage is fixed as a gate-on voltage to control the display of the display; When the ambient temperature changes from the first temperature value to the second temperature value, the display is controlled to insert a frame of full black picture; Acquire a target compensation voltage corresponding to the second temperature value, and fix the target compensation voltage as a gate-on voltage to control display of the display; When the ambient temperature changes from the second temperature value to the first temperature value, controlling the display to insert and display a frame of the all-black picture; A driving voltage corresponding to the first temperature value is obtained, and the driving voltage is fixed as the gate-on voltage to control the display of the display.

2. The display control method according to claim 1, characterized in that: The control method of the display further includes: pre-storing a plurality of the preset temperature values ​​and a plurality of preset compensation voltages that are mapped to the preset temperature values.

3. The display control method according to claim 2, characterized in that: The obtaining of the target compensation voltage corresponding to the second temperature value comprises: A preset temperature that is the same as the second temperature value among the plurality of preset temperature values ​​is searched, and the preset compensation voltage corresponding to the preset temperature is used as the target compensation voltage.

4. A display device, characterized in that: The display device comprises a control module and a display, wherein the control module is electrically connected to the display; the control module comprises a temperature detection module, a power management integrated module and a controller connected in sequence; The temperature detection module is used to obtain the ambient temperature of the display, and convert the ambient temperature into a corresponding voltage value and output it to the power management integrated module; The power management integrated module is used to feed back the voltage value to the controller; The controller is used for determining that the ambient temperature is a first temperature value when the voltage value is a first voltage value, and controlling the power management integrated module to output a corresponding driving voltage fixed as a gate-on voltage according to the first temperature value, so as to control the display of the display; The controller is also used to determine that the ambient temperature changes from the first temperature value to the second temperature value when the voltage value changes from the first voltage value to the second voltage value, and control the display to insert a frame of full black picture, and control the power management integrated module to output a corresponding target compensation voltage fixed as the gate start voltage according to the second temperature value, so as to control the display to display; The controller is also used for determining that the ambient temperature changes from the second temperature value to the first temperature value when the voltage value changes from the second voltage value to the first voltage value, and controlling the display to insert a frame of a completely black picture, and controlling the power management integrated module to output a corresponding driving voltage fixed as a gate-on voltage according to the first temperature value, so as to control the display to display; Among them, the second temperature value is greater than the first temperature value; the second temperature value is normal temperature and the difference between the first temperature value and the second temperature value is greater than a preset temperature value.

5. The display device according to claim 4, characterized in that The voltage value is negatively correlated with the ambient temperature.

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