Display device and driving method of display panel

Abstract

The embodiment of the invention provides a display device and a driving method of a display panel, relates to the technical field of display, and is used for avoiding brightness change caused by temperature change of the display panel and improving brightness stability. The display device comprises a display panel, the display panel comprises a display area, and the display area comprises a plurality of data lines, a plurality of grid lines and a first temperature sensor; an adjustment circuit; the adjusting circuit is electrically connected with the first temperature sensor, and the adjusting circuit is used for adjusting the data voltage applied to the data line according to the temperature detected by the first temperature sensor; at least one data line is multiplexed as a first temperature sensor; and / or at least one grid line is multiplexed as a first temperature sensor.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a driving method for a display panel. Background Art

[0002] With the continuous development of science and technology, more and more display devices are widely used in people's daily life and work, becoming an indispensable tool for people today. In addition, with the continuous development of display technology, consumers' requirements for displays are constantly increasing. Currently, display panels have the problem of unstable brightness. Summary of the Invention

[0003] Embodiments of the present invention provide a display device and a method for driving a display panel, which are used to prevent brightness changes of the display panel caused by temperature changes and improve brightness stability.

[0004] In a first aspect, an embodiment of the present invention provides a display device, including: A display panel, the display panel includes a display area, the display area includes a plurality of data lines, a plurality of gate lines and a first temperature sensor; The adjustment circuit is electrically connected to the first temperature sensor, and the adjustment circuit is used to adjust the data voltage applied to the data line according to the temperature detected by the first temperature sensor; At least one data line is multiplexed as a first temperature sensor; and / or at least one gate line is multiplexed as a first temperature sensor.

[0005] In a second aspect, an embodiment of the present invention provides a method for driving a display panel, wherein the display panel includes a display area, the display area includes a plurality of data lines, a plurality of gate lines, and a first temperature sensor. At least one data line is multiplexed as a first temperature sensor; and / or at least one gate line is multiplexed as a first temperature sensor; Drive methods include: applying a first detection voltage to the first temperature sensor; A first electrical signal transmitted by the first temperature sensor is detected, and a data voltage applied to the data line is adjusted according to the first electrical signal.

[0006] The display device and display panel driving method provided by the embodiments of the present invention, by setting a first temperature sensor in the display area of ​​the display panel, can use the first temperature sensor to detect the temperature of the medium in the display area that affects the light output intensity, and can use the adjustment circuit to adjust the data voltage applied to the data line according to the above temperature to compensate for the influence of temperature changes on the characteristics of the display medium in the display area, so that the data voltage can conform to the grayscale-brightness characteristic curve of the display panel at the current temperature, reduce the brightness difference caused by temperature changes, and help improve the brightness stability of the display panel.

[0007] In addition, by setting the first temperature sensor in the display area, the embodiment of the present invention can make the detected temperature closer to the above-mentioned display medium compared to the method of setting the first temperature sensor outside the display area, and can reduce the difference between the detected temperature and the actual temperature of the display medium, which is conducive to improving the accuracy of the detected temperature and further improving the accuracy of the data voltage applied during the display stage.

[0008] Moreover, the embodiment of the present invention multiplexes at least one data line as the first temperature sensor; and / or multiplexes at least one gate line as the first temperature sensor. While the first temperature sensor is located in the display area, there is no need to set up other additional structures in the display area to serve as the first temperature sensor, which is beneficial to simplifying the structure of the display panel and reducing the structural complexity of the display panel.

[0009] On the other hand, the embodiments of the present invention multiplex at least one gate line or at least one data line as the first temperature sensor. For a liquid crystal display panel, the gate line and the data line can be arranged to avoid the opening area of ​​the sub-pixel. Therefore, the first temperature sensor can be prevented from occupying additional space in the opening area of ​​the sub-pixel, which is beneficial to improving the aperture ratio of the sub-pixel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 Schematic diagram of voltage-transmittance characteristics of a liquid crystal display panel at two different temperatures in the related art; Figure 2 A schematic diagram of an equivalent circuit of a display device provided by an embodiment of the present invention; Figure 3 A schematic diagram of an equivalent circuit of another display device provided by an embodiment of the present invention; Figure 4 A schematic diagram of an equivalent circuit of another display device provided by an embodiment of the present invention; Figure 5 A schematic diagram of the connection relationship between a first temperature sensor, an adjustment circuit, and a data driving circuit provided by an embodiment of the present invention; Figure 6 A schematic diagram showing changes in resistance of a first temperature sensor according to an embodiment of the present invention; Figure 7 A schematic diagram of a data line multiplexed as a first temperature sensor provided by an embodiment of the present invention; Figure 8 A schematic diagram of a first data line provided by an embodiment of the present invention; Figure 9 A schematic diagram of another display panel provided by an embodiment of the present invention; Figure 10 A schematic diagram of a first gate line provided by an embodiment of the present invention; Figure 11 A schematic diagram of another display panel provided by an embodiment of the present invention; Figure 12 A schematic diagram of another display panel provided by an embodiment of the present invention; Figure 13 A schematic diagram of another display panel provided by an embodiment of the present invention; Figure 14 A schematic diagram of the connection relationship between a first temperature sensor, a second temperature sensor, an adjustment circuit, and a data driving circuit provided by an embodiment of the present invention; Figure 15 A schematic diagram of another display panel provided by an embodiment of the present invention; Figure 16 A schematic diagram of a method for driving a display panel provided by an embodiment of the present invention; Figure 17 A signal diagram of a first temperature sensor provided by an embodiment of the present invention; Figure 18 A schematic diagram of another display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0012] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0013] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0014] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0015] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0016] As mentioned in the background section, the display panel has the problem of unstable brightness. For example, the brightness of the display device will vary greatly within a period of time after it is turned on. The inventors have found that, taking the liquid crystal display panel as an example, since the driver chip and the backlight source will generate heat during operation, after the liquid crystal display panel starts working, the dielectric constant, refractive index, and viscosity of the liquid crystal will change with the change of temperature, which will cause the voltage-transmittance characteristics of the liquid crystal display to change. Figure 1 As shown, Figure 1 This figure shows the voltage-transmittance characteristics of a liquid crystal display panel at two different temperatures. As can be seen, as the temperature increases from TE1 to TE2, the voltage-transmittance curve of the display panel shifts to the right. Therefore, when the same data voltage is applied to the subpixels, the transmittance of the display panel decreases as the temperature increases. For a period of time after the display device is powered on, the internal temperature of the display device has not yet stabilized, so the desired voltage-transmittance characteristics cannot be achieved.

[0017] In view of this, an embodiment of the present invention provides a display device. Exemplarily, the display device can be any device with a display function, such as a mobile phone, a tablet computer, a laptop computer, an e-reader, a television, a smart watch, a medical diagnostic display screen, etc., and the embodiment of the present invention is not limited to this.

[0018] like Figure 2 As shown, Figure 2 The equivalent circuit diagram of a display device provided by an embodiment of the present invention is shown in FIG. 1 , wherein the display device 100 includes a display panel 1, the display panel 1 includes a display area AA, the display area AA includes a plurality of sub-pixels 10, and gate lines 11 and data lines 12 electrically connected to the sub-pixels 10. Figure 2 As shown, the gate lines 11 extend along a first direction h11, and a plurality of gate lines 11 are arranged along a second direction h12. The data lines 12 extend along the second direction h12, and a plurality of data lines 12 are arranged along the first direction h11.

[0019] In the embodiment of the present invention, Figure 2 As shown, the display panel 1 further includes a first temperature sensor 161, at least part of which is located in the display area AA. Figure 2 As shown, the display device further includes an adjustment circuit 3 electrically connected to the first temperature sensor 161 .

[0020] Exemplarily, the working process of the display panel includes a detection period and a display period.

[0021] During the detection period, a first detection voltage is applied to the first temperature sensor 161. The adjustment circuit 3 adjusts the data voltage applied to the data line 12 during the display period based on the temperature of the display area AA detected by the first temperature sensor 161, thereby driving the sub-pixels 10 in the display panel to display at a target brightness. For example, the first temperature sensor 161 can be used to sense the temperature of the display medium in the display area AA, which is used to determine the brightness of the sub-pixels 10.

[0022] When the display panel 1 comprises a liquid crystal display (LCD), the deflection angle of the liquid crystal affects the light intensity of the sub-pixels. The medium that determines the brightness of the display panel may comprise liquid crystal. Alternatively, when the display panel 1 comprises an organic light emitting diode (OLED) display panel, the medium that determines the brightness of the display panel may comprise a light-emitting layer.

[0023] In the embodiment of the present invention, at least one data line 12 is multiplexed into a first temperature sensor 161; and / or at least one gate line 11 is multiplexed into a first temperature sensor 161. For ease of description, the data line multiplexed into the first temperature sensor 161 is hereinafter labeled as a first data line 121, and the gate line multiplexed into the first temperature sensor 161 is hereinafter labeled as a first gate line 111. Figure 2 The first data line 121 is multiplexed as the first temperature sensor 161 as an example.

[0024] like Figure 3 As shown, Figure 3 This is a schematic diagram of an equivalent circuit of another display device provided by an embodiment of the present invention, in which the first gate line 111 is multiplexed as the first temperature sensor 161 as an example.

[0025] like Figure 4 As shown, Figure 4An equivalent circuit diagram of another display device provided in an embodiment of the present invention, in which the first temperature sensor 161 includes a first sub-temperature sensor 1611 and a second sub-temperature sensor 1612, the first gate line 111 is multiplexed as the first sub-temperature sensor 1611, and the first data line 121 is multiplexed as the second sub-temperature sensor 1612 as an example.

[0026] For example, Figure 2 、 Figure 3 and Figure 4 As shown, the display panel 1 further includes a gate driving circuit 221 and a data driving circuit 222. When the display panel 1 is displaying, the gate driving circuit 221 provides an enable level to the gate lines 11 row by row, and the data driving circuit 222 provides a data voltage to the data lines 12 based on the received image data and the signal fed back by the adjustment circuit 3, so as to drive the sub-pixels 10 to light up.

[0027] When the first data line 121 is multiplexed as the first temperature sensor 161, Figure 2 and Figure 4 As shown, the first data line 121 is electrically connected to the adjustment circuit 3. When the display area AA is temperature-detected, a first detection voltage can be applied to the first data line 121. Under the action of the first detection voltage, the first data line 121 has a corresponding temperature. When the display panel 1 is displaying, the gate drive circuit 221 can provide a gate drive signal to the gate line 11. The adjustment circuit 3 can apply an adjustment signal to the data drive circuit 222 based on the detected temperature. The data drive circuit 222 applies an adjusted data voltage to the first data line 121 based on the adjustment signal and image data.

[0028] When the first gate line 111 is multiplexed as the first temperature sensor 161, Figure 3 and Figure 4 As shown, the first gate line 111 is electrically connected to the adjustment circuit 3. When the display panel is subjected to temperature detection, a first detection voltage is applied to the first gate line 111. Under the action of the first detection voltage, the first gate line 111 can have a corresponding temperature. When the display panel is displaying, the gate drive circuit 221 can provide a gate drive signal to the first gate line 111. The adjustment circuit 3 can apply an adjustment signal to the data drive circuit 222 based on the detected temperature. The data drive circuit 222 can apply the adjusted data voltage to the first data line 121 based on the adjustment signal and image data.

[0029] The data voltage applied to data line 12 can be set with reference to the grayscale-brightness curve of the display panel. The grayscale-brightness curve, also known as a gamma curve, represents the correspondence between the grayscale voltage applied to a subpixel 10 and the brightness of that subpixel 10. When the temperature of the environment surrounding display panel 1 changes, the inherent properties of the medium within display panel 1 that determines the light output effect can change, causing the grayscale-brightness curve of display panel 1 to shift. If the data voltage is still set according to the existing grayscale-brightness curve, the display will deviate from the target.

[0030] In the embodiment of the present invention, by setting a first temperature sensor 161 in the display area AA, the first temperature sensor 161 can be used to detect the temperature of the display medium in the display area AA that affects the light output intensity, and the adjustment circuit 3 can be used to adjust the data voltage applied to the data line 12 according to the above temperature to compensate for the influence of temperature changes on the display medium characteristics in the display area AA, such as liquid crystal characteristics, so that the data voltage can conform to the grayscale-brightness characteristic curve of the display panel 1 at the current temperature, which is beneficial to improving the brightness stability of the display panel 1 and avoiding brightness differences in the display panel 1 caused by temperature changes of the display panel 1.

[0031] For example, the aforementioned temperature changes can occur at different times after the display device is powered on. During these times, the temperature of the driver chip, circuitry, and other structures in the display device may change due to heat generated during operation. The display device provided by an embodiment of the present invention can control the brightness variation at each grayscale within 15 to 180 minutes after the display device is powered on to within 3%. The brightness variation refers to the ratio of the difference between the maximum and minimum brightness values ​​of the display panel 1 at a certain grayscale to the maximum value. This prevents the brightness of the display panel 1 from being affected by changes in the grayscale-brightness curve as temperature changes, thereby improving the brightness stability of the display panel.

[0032] In particular, in equipment such as those used for medical diagnosis and other life-threatening equipment that requires high display accuracy, the use of this display device can improve the brightness stability of the display device.

[0033] In addition, by setting the first temperature sensor 161 in the display area AA, the embodiment of the present invention can make the detected temperature closer to the above-mentioned display medium, compared with the method of setting the first temperature sensor 161 outside the display area AA, and can reduce the difference between the detected temperature and the actual temperature of the display medium, which is beneficial to improving the accuracy of the detected temperature and further improving the accuracy of the data voltage applied during the display stage.

[0034] Moreover, the embodiment of the present invention multiplexes at least the first data line 121 as the first temperature sensor 161; and / or multiplexes at least the first gate line 111 as the first temperature sensor 161. While the first temperature sensor 161 is located in the display area AA, there is no need to set up other additional structures in the display area AA to serve as the first temperature sensor 161, which is beneficial to simplifying the structure of the display panel and reducing the structural complexity of the display panel 1.

[0035] On the other hand, the embodiments of the present invention multiplex at least the first data line 121 as the first temperature sensor 161; and / or multiplex at least the first gate line 111 as the first temperature sensor 161. For the liquid crystal display panel, the gate line 11 and the data line 12 can be arranged to avoid the opening area of ​​the sub-pixel 10. Therefore, the first temperature sensor 161 can be prevented from occupying additional space in the opening area of ​​the sub-pixel 10, which is beneficial to improving the aperture ratio of the sub-pixel 10.

[0036] For example, Figure 5 As shown, Figure 5 This is a schematic diagram showing the connection relationship between a first temperature sensor, an adjustment circuit, and a data driving circuit according to an embodiment of the present invention. The adjustment circuit 3 includes an analog-to-digital conversion unit 31 and a control unit 32. The first temperature sensor 161 can output a first electrical signal corresponding to the temperature to the analog-to-digital conversion unit 31. The first electrical signal can be an analog signal.

[0037] Exemplarily, the first electrical signal includes a resistance value. When performing temperature detection, a detection voltage may be provided to the first temperature sensor 161, and the current value flowing through the first temperature sensor 161 under the detection voltage may be detected. Based on the voltage value of the detection voltage and the current value flowing through the first temperature sensor 161, the resistance value of the first temperature sensor 161 at the current temperature may be obtained. This resistance value may be output as a first electrical signal corresponding to the temperature to the analog-to-digital conversion unit 31.

[0038] The analog-to-digital conversion unit 31 can convert an analog signal into a digital signal and output the digital signal to the control unit 32. Exemplarily, the control unit 32 includes a lookup table (LUT) 320. The control unit 32 receives the digital signal representing the temperature and searches the LUT 320 to obtain the gamma compensation value corresponding to the digital signal representing the temperature. Exemplarily, the LUT 320 can be pre-stored in the control unit 32. The LUT 320 includes gamma compensation values ​​corresponding to multiple different temperatures. Optionally, the LUT 320 can only store the correspondence between a predetermined number of temperatures and gamma compensation values, without providing gamma compensation values ​​for all temperatures. The control unit 32 can generate gamma compensation values ​​for all temperatures by performing operations on the gamma compensation values ​​corresponding to the existing temperatures, such as difference operations.

[0039] For example, Figure 5 As shown, the adjustment circuit 3 also includes a gamma correction circuit 33 electrically connected to the control unit 32 and the data driver circuit 222. The gamma compensation value corresponding to the temperature output by the control unit 32 is provided to the gamma correction circuit 33. The gamma correction circuit 33 can generate the gamma reference voltage required by the data driver circuit 222 based on the gamma compensation value. The data driver circuit 222 outputs the target data voltage to the data line 12 based on the gamma reference voltage and image data to form the voltage required to illuminate the sub-pixel 10.

[0040] For example, Figure 2 、 Figure 3 and Figure 4 As shown, the display device further includes a timing controller 4, which can receive a timing control signal from outside the display device and output a plurality of timing drive signals in response to the timing control signal. Exemplarily, the timing drive signal includes a data control signal for controlling the data drive circuit 222 and a gate control signal for controlling the gate drive circuit 221.

[0041] Optionally, the adjustment circuit 3 and the timing controller 4 may be integrated into a driver chip; or they may be provided separately. For example, the adjustment circuit 3 may be independent of the driver chip, which is not limited in the embodiment of the present invention.

[0042] Illustratively, the material of the first gate lines 111 or the first data lines 121 includes one or more of molybdenum metal, molybdenum alloy, aluminum metal, aluminum alloy, copper metal, copper alloy, chromium metal, chromium alloy, and metal oxides such as indium tin oxide (ITO). These materials change in resistance when the temperature changes, thereby enabling the first temperature sensor 161 to output a first electrical signal corresponding to the temperature.

[0043] Optionally, in an embodiment of the present invention, the resistance of the first temperature sensor 161 can change with the change of temperature. Optionally, the relationship between the resistance and temperature of the first temperature sensor 161 can be a linear relationship, for example, Figure 6 As shown, Figure 6 This is a schematic diagram showing how the resistance of a first temperature sensor changes with temperature, provided in an embodiment of the present invention. The resistance of the first temperature sensor 161 can increase linearly with increasing temperature. Alternatively, in an embodiment of the present invention, the resistance of the first temperature sensor 161 can decrease linearly with decreasing temperature. Alternatively, the relationship between the resistance of the first temperature sensor 161 and temperature can be nonlinear, which is not limited in this embodiment of the present invention.

[0044] For example, when the first data line 121 is multiplexed as the first temperature sensor 161 , the embodiment of the present invention may allow the first data line 121 to include any one of a straight line, a broken line, and a curve.

[0045] Optional, such as Figure 7 As shown, Figure 7 A schematic diagram of a first data line 121 provided in an embodiment of the present invention, wherein the first data line 121 includes a fold line 1210. Based on this configuration, the length of the first data line 121 per unit area can be increased, thereby increasing the resistance of the first data line 121 per unit area, thereby increasing the temperature range that can be detected by the first temperature sensor 161.

[0046] For example, Figure 7 As shown, the data line 12 not multiplexed as the first temperature sensor 161 is marked as a second data line 122. Exemplarily, the second data line 122 and the first data line 121 may have the same or different shapes. For example, the second data line 122 may be a straight line or a broken line. Figure 7 The second data line 122 is taken as a straight line for illustration.

[0047] For example, Figure 7 As shown, along a direction perpendicular to the plane of the display panel, the fold line 1210 in the first data line 121 may at least partially overlap with the gate line 11 to maximize the length of the fold line 1210 while avoiding affecting the aperture ratio of the sub-pixel 10 .

[0048] In another possible implementation, Figure 8 As shown, Figure 8A schematic diagram of a first data line provided in an embodiment of the present invention. The first data line 121 includes a first sub-segment 1211, a second sub-segment 1212, and a third sub-segment 1213. The second sub-segment 1212 connects the first sub-segment 1211 and the third sub-segment 1213. The first sub-segment 1211 and the third sub-segment 1213 may be parallel to each other. Figure 8 As an example, both of the sub-segments extend along the second direction h12. The second sub-segment 1212 may include a broken line.

[0049] For example, Figure 8 As shown, the second sub-segment 1212 can be connected to the ends of the first sub-segment 1211 and the third sub-segment 1213. Based on this configuration, the length of the first data line 121 per unit area can be further increased, thereby increasing the resistance of the first data line 121, and thus increasing the temperature range that can be detected by the first temperature sensor 161.

[0050] An end of the first sub-segment 1211 or the third sub-segment 1213 that is not connected to the second sub-segment 1212 is electrically connected to the adjustment circuit 3 . Figure 8 As an example, the end of the first sub-segment 1211 that is not connected to the second sub-segment 1212 is electrically connected to the adjustment circuit 3 .

[0051] For example, when the first gate line 111 is reused as the first temperature sensor 161, the embodiment of the present invention can make the first gate line 111 include any one of a straight line, a broken line, and a curve. Figure 9 As shown, Figure 9 A schematic diagram of another display panel provided in an embodiment of the present invention, wherein the first gate line 111 includes a fold line 1110. Based on this arrangement, the length of the first gate line 111 per unit area can be increased, thereby increasing the resistance of the first gate line 111 per unit area, and thereby increasing the temperature range detectable by the first temperature sensor 161.

[0052] For example, Figure 9 As shown, along a direction perpendicular to the plane of the display panel, the fold line in the first gate line 111 may at least partially overlap with the data line 12 to maximize the length of the fold line while avoiding affecting the aperture ratio of the sub-pixel.

[0053] In another possible implementation, Figure 10 As shown, Figure 10 A schematic diagram of a first gate line provided in an embodiment of the present invention, wherein the first gate line 111 includes a fourth sub-segment 1111, a fifth sub-segment 1112, and a sixth sub-segment 1113. The fifth sub-segment 1112 connects the fourth sub-segment 1111 and the sixth sub-segment 1113. The fourth sub-segment 1111 and the sixth sub-segment 1113 may be parallel to each other. Figure 10 Both of them extend along the first direction h11 as an illustration. The fifth sub-segment 1112 may include a broken line. Exemplarily, the fifth sub-segment 1112 may be connected to the ends of the fourth sub-segment 1111 and the sixth sub-segment 1113. Based on this arrangement, the length of the first gate line 111 per unit area can be further increased, thereby increasing the resistance of the first gate line 111, thereby increasing the temperature range that the first temperature sensor 161 can detect.

[0054] Ends of the fourth sub-segment 1111 and the sixth sub-segment 1113 that are not connected to the fifth sub-segment 1112 are electrically connected to the adjustment circuit 3 . Figure 10 As an example, the end of the sixth sub-segment 1113 that is not connected to the fifth sub-segment 1112 is electrically connected to the adjustment circuit 3 .

[0055] Optional, such as Figure 11 and Figure 12 As shown, Figure 11 and Figure 12 Schematic diagrams of two other display panels provided in embodiments of the present invention. Display panel 1 includes a liquid crystal display panel and a non-display area NA. Non-display area NA includes an edge-lit backlight 15. Edge-lit backlight 15 is a backlight located to one side of display area AA in a direction parallel to the plane of the display panel. Embodiments of the present invention facilitate reducing the thickness of display panel 1 by including edge-lit backlight 15.

[0056] In this embodiment of the present invention, the extension line of the first temperature sensor 161 is offset from the edge-lit backlight source 15. That is, the extension line of the first temperature sensor 161 does not pass through the edge-lit backlight source 15; in other words, the extension line of the first temperature sensor 161 is positioned away from the edge-lit backlight source 15. When the display panel is operating, the edge-lit backlight source 15 generates heat while emitting light. By positioning the first temperature sensor 161 away from the edge-lit backlight source 15, the embodiment of the present invention allows the first temperature sensor 161 to avoid the heat source, enabling the temperature detected by the first temperature sensor 161 to more accurately approximate the temperature of the liquid crystal in the display area, thereby improving the accuracy of liquid crystal temperature detection.

[0057] Figure 11 Assume that the edge-type backlight source 15 is located on one side of the display area AA in the second direction h12 , the first gate line 111 is reused as the first temperature sensor 161 , and the extension line of the first gate line 111 does not pass through the edge-type backlight source 15 .

[0058] Figure 12As an example, the edge-type backlight source 15 is located on one side of the display area AA in the first direction h11 , one data line 12 is reused as the first temperature sensor 161 , and the extension line of the first data line 121 does not pass through the edge-type backlight source 15 .

[0059] Exemplarily, the edge-type backlight source 15 includes a light emitting diode (LED).

[0060] Optional, such as Figure 11 and Figure 12 As shown, the non-display area NA includes a first non-display area NA1 and a second non-display area NA2; the first non-display area NA1 and the display area AA are arranged along a first direction h11, and the second non-display area NA2 and the display area AA are arranged along a second direction h12.

[0061] For example, Figure 12 As shown, the embodiment of the present invention can multiplex the first data line 121 as the first temperature sensor 161. In this case, the embodiment of the present invention can enable the first non-display area NA1 to include an edge-type backlight source 15. Based on this setting, the first data line 121 and the edge-type backlight source 15 can be prevented from crossing, thereby preventing the temperature of the first data line 121 from being affected by the edge-type backlight source 15, which is beneficial to improving the accuracy of the liquid crystal temperature detected by the first data line 121.

[0062] Moreover, the embodiment of the present invention can improve the temperature uniformity of the first data line 121 at different positions by preventing the extension line of the first data line 121 from intersecting the edge-type backlight source 15 , thereby improving the accuracy of temperature detection.

[0063] Or, as Figure 11 As shown, in an embodiment of the present invention, the first gate line 111 can be reused as the first temperature sensor 161. In this case, the second non-display area NA2 can include an edge-type backlight source 15. Based on this arrangement, the extension of the first gate line 111 can be prevented from intersecting with the edge-type backlight source 15, thereby preventing the temperature of the first gate line 111 from being affected by the heat generated by the edge-type backlight source 15, which is beneficial for improving the accuracy of the liquid crystal temperature detected by the first gate line 111.

[0064] When the first data line 121 is multiplexed as the first temperature sensor 161, for example, Figure 12As shown, the distance between the first data line 121 and the first edge E1 of the display panel 1 is d1, the distance between the first data line 121 and the second edge E2 of the display panel 1 is d2, the distance between two adjacent data lines 12 is d12, and |d1-d2|≤5d12, where the first edge E1 and the second edge E2 are two edges of the display panel 1 in the first direction h11. Based on this configuration, a data line 12 that is as central as possible in the display panel 1 can be selected to multiplex as the first temperature sensor 161, so that the temperature detected by the first temperature sensor 161 is closer to the temperature of the central area of ​​the display panel 1 in the first direction h11.

[0065] When at least one gate line 11 is multiplexed as the first temperature sensor 161, for example, Figure 11 As shown, the distance between the first gate line 111 and the third edge E3 of the display panel 1 is d3, the distance between the first gate line 111 and the fourth edge E4 of the display panel 1 is d4, and the distance between two adjacent gate lines 11 is d34, where |d3-d4|≤5d34, and the third edge E3 and the fourth edge E4 are two edges of the display panel 1 in the second direction h12. Based on this setting, a gate line 11 as close as possible to the center of the display panel 1 in the second direction h12 can be selected from the multiple gate lines 11 to be reused as the first temperature sensor 161, so that the temperature detected by the first temperature sensor 161 is closer to the temperature of the central area of ​​the display panel 1 in the second direction h12.

[0066] It should be noted that Figure 11 The distance d34 between two adjacent gate lines 11 is shown as Figure 12 The distance d12 between two adjacent data lines 12 is shown for illustrative purposes only, and the present invention does not limit the relationship between the two. For example, in single-gate and dual-gate display devices, 3d12 can be set to d34, and in triple-gate display devices, d12 can be set to 3d34.

[0067] The above description of the position of the first temperature sensor 161 in the display panel is based on the example of a temperature test position close to the center of the display panel. In other possible implementations, the embodiment of the present invention can also adjust the position of the first temperature sensor 161 in the display panel according to different temperature test requirements.

[0068] For example, Figure 13 As shown, Figure 13This is a schematic diagram of another display panel provided in an embodiment of the present invention. The display panel further includes a second temperature sensor 162. The second temperature sensor 162 can be used to detect the temperature of the area between the first temperature sensor 161 and the non-display area AA of the display panel 1. In other words, the temperature of the area in the display area AA where the first temperature sensor 161 is not provided.

[0069] For example, the second temperature sensor 162 can be used to detect the temperature of the area between the gate line 11 and the non-display area AA, and / or to detect the temperature of a location between the data line 12 and the non-display area AA in the display panel 1. The provision of the second temperature sensor 162 can further improve the accuracy of temperature detection of the display area AA on the basis of the first temperature sensor 161, thereby further improving the display accuracy of the display panel 1.

[0070] Exemplarily, the second temperature sensor 162 may include a metal wire 1620. Exemplarily, the material of the metal wire 1620 includes one or more of molybdenum, a molybdenum alloy, aluminum, an aluminum alloy, copper, a copper alloy, chromium, a chromium alloy, and a metal oxide such as indium tin oxide (ITO). These materials produce a change in resistance when the temperature changes, thereby causing the second temperature sensor 162 to output a second electrical signal corresponding to the temperature.

[0071] The metal line 1620 and the adjustment circuit ( Figure 13 When the temperature of the display panel 1 is detected, a second detection voltage may be applied to the second temperature sensor 162. Under the action of the second detection voltage, the second temperature sensor 162 outputs a second electrical signal corresponding to its temperature.

[0072] For example, the embodiment of the present invention can calculate the second electrical signal and the first electrical signal, and send the calculated value to the adjustment circuit 3, which can control the data driving circuit 222 to adjust the data voltage applied to the data line 12 according to the calculated value. Figure 14 As shown, Figure 14This is a schematic diagram illustrating the connection relationship between a first temperature sensor, a second temperature sensor, an adjustment circuit, and a data driver circuit according to an embodiment of the present invention. The adjustment circuit 3 further includes a calculation unit 34, whose inputs are electrically connected to the first temperature sensor 161 and the second temperature sensor 162, and whose outputs are electrically connected to the analog-to-digital conversion unit 31. The calculation unit 34 calculates the first electrical signal obtained by the first temperature sensor 161 and the second electrical signal obtained by the second temperature sensor 162, and sends the calculated value to the analog-to-digital conversion unit 31. The analog-to-digital conversion unit 31 converts the calculated value into a digital signal and outputs the digital signal to the control unit 32. The control unit 32 receives the digital signal, searches a lookup table 320 to obtain a gamma compensation value corresponding to the digital signal, and outputs the gamma compensation value to the gamma correction circuit 33. The gamma correction circuit 33 generates a gamma reference voltage required by the data driver circuit 222 based on the gamma compensation value. The data driver circuit 222 outputs a target data voltage to the data line 12 based on the gamma reference voltage and image data, thereby forming the voltage required to illuminate the sub-pixel 10.

[0073] Alternatively, the embodiment of the present invention may also enable the first temperature sensor 161 and the second temperature sensor 162 to operate in a time-sharing manner. For example, the embodiment of the present invention may enable the adjustment circuit 3 to include a first switch electrically connected to the first temperature sensor 161 and a second switch electrically connected to the second temperature sensor 162. The first switch and the second switch may be turned on in a time-sharing manner, so that the adjustment circuit receives signals transmitted by the first temperature sensor 161 and the second temperature sensor 162 in a time-sharing manner.

[0074] The metal line 1620 serving as the second temperature sensor 162 can be provided in the same layer as the gate line 11 or the data line 12. When the metal line 1620 and the gate line 11 are provided in the same layer, the metal line 1620 and the gate line 11 can be made of the same material, and the two can be formed in the same process. When the metal line 1620 and the data line 12 are provided in the same layer, the metal line 1620 and the data line 12 can be made of the same material, and the two can be formed in the same process. Based on this arrangement, the process complexity of the display panel 1 is reduced, and the thickness of the display panel 1 is reduced.

[0075] In the embodiment of the present invention, the metal line 1620 is insulated from the gate line 11 and the data line 12 .

[0076] For example, Figure 13 As shown, the metal line 1620 may be located on a side of the gate line 11 close to the non-display area NA, or on a side of the data line 12 close to the non-display area NA.

[0077] like Figure 13As shown, the non-display area NA also includes a third non-display area NA3 and a fourth non-display area NA4. Along the first direction h11, the third non-display area NA3 is located on the side of the display area AA away from the first non-display area NA1. Along the second direction h12, the fourth non-display area NA4 is located on the side of the display area AA away from the second non-display area NA2.

[0078] The metal lines 1620 include at least one of a first metal line 1621, a second metal line 1622, a third metal line 1623, and a fourth metal line 1624. Along the first direction h11, the first metal line 1621 is located between the gate line 11 and the first non-display area NA1, the second metal line 1622 is located between the gate line 11 and the second non-display area NA2, the third metal line 1623 is located between the data line 12 and the third non-display area NA3, and the fourth metal line 1624 is located between the data line 12 and the fourth non-display area NA4.

[0079] In the embodiment of the present invention, at least a portion of the metal line 1620 is located in the display area AA. Figure 15 As shown, Figure 15 A schematic diagram of another display panel provided in an embodiment of the present invention, wherein the display panel 1 further includes a black matrix 17, and the black matrix 17 is located on the light-emitting side of the display panel. Exemplarily, the display panel includes an array substrate and a color filter substrate arranged opposite to each other, and the array substrate and the color filter substrate are located on both sides of the liquid crystal. The above-mentioned gate lines and data lines can be located in the array substrate, and the black matrix can be located in the color filter substrate. The black matrix 17 is located between two adjacent sub-pixels 10. In an embodiment of the present invention, along the direction h2 perpendicular to the plane where the display panel 1 is located, the black matrix 17 at least partially overlaps with the above-mentioned metal lines 1620, gate lines 11 and data lines 12. Based on this setting, the setting of the second temperature sensor 162 can be prevented from affecting the aperture ratio of the sub-pixel 10. The black matrix 17 can block the above-mentioned gate lines 11 and data lines 12 and other wiring, as well as avoid crosstalk between two adjacent sub-pixels 10.

[0080] Based on the same inventive concept, the embodiment of the present invention further provides a driving method of the display panel 1, Figure 2 、 Figure 3 and Figure 4 As shown, the display panel 1 includes a display area AA, and the display area AA includes a plurality of data lines 12, a plurality of gate lines 11 and a first temperature sensor 161. Figure 2 and Figure 4 As shown, the plurality of data lines 12 include at least a first data line 121, and the first data line 121 is multiplexed as a first temperature sensor 161; and / or, as shown Figure 3 and Figure 4 As shown, the plurality of gate lines 11 include at least a first gate line 111, and the first gate line 111 is multiplexed as a first temperature sensor 161; Figure 16 As shown, Figure 16 A schematic diagram of a method for driving a display panel provided in an embodiment of the present invention, the method comprising: Step S1: applying a first detection voltage to the first temperature sensor 161; wherein, under the action of the first detection voltage, the first temperature sensor 161 generates a first electrical signal corresponding to its temperature; Step S2 : detecting the first electrical signal transmitted by the first temperature sensor 161 , and adjusting the data voltage applied to the data line 12 according to the first electrical signal.

[0081] For example, combined Figure 2 As shown, the first electrical signal may be transmitted to the adjustment circuit 3 , and the adjustment circuit 3 adjusts the data voltage applied to the data line 12 based on the first electrical signal.

[0082] The driving method of the display panel 1 provided in the embodiment of the present invention detects the first electrical signal fed back by the first temperature sensor 161 and adjusts the data voltage applied to the data line 12 according to the first electrical signal. This can match the data voltage with the temperature in the display area, compensate for the influence of temperature changes on the display medium characteristics in the display area AA, such as liquid crystal characteristics, so that the data voltage can conform to the grayscale-brightness characteristic curve of the display panel 1 at the current temperature, which is beneficial to improving the brightness stability of the display panel 1 and avoiding the brightness difference of the display panel 1 caused by the temperature change of the display panel 1, thereby making the data voltage consistent with the grayscale-voltage transmittance curve at the current temperature, and improving the display accuracy.

[0083] For example, combined Figure 17 As shown, Figure 17 This is a signal diagram of a first temperature sensor provided by an embodiment of the present invention. The operation process of the display panel includes a detection period T1 and a display period T2. The above-mentioned driving method includes: During the detection period T1, a first detection voltage V1 is applied to the first temperature sensor 161; During the display period T2, a display voltage V2 is applied to the first temperature sensor 161, and the data voltage applied to the data line 12 is adjusted. For example, during the display period T2, embodiments of the present invention can adjust the data voltage applied to the data line 12 based on the first electrical signal. Based on this configuration, temperature detection and providing a data voltage to drive the display panel can be performed in a time-sharing manner, thereby preventing display abnormalities on the display panel caused by temperature testing.

[0084] It should be noted that Figure 17 The magnitudes of the first detection voltage V1 and the display voltage V2 are merely for illustration, and the embodiment of the present invention does not limit the specific magnitude relationship between the two.

[0085] Exemplarily, the display period includes multiple image frames, and the detection period T1 may be located between two adjacent image frames. That is, the temperature detection is performed during a period when the display panel does not update the image.

[0086] For example, Figure 18 As shown, Figure 18 A schematic diagram of another display panel provided in an embodiment of the present invention is provided. When the display panel includes a liquid crystal display panel, a sub-pixel 10 includes a transistor 13 and a pixel electrode 14. The gate of the transistor 13 is electrically connected to the gate line 11, and the first and second electrodes of the transistor 13 are electrically connected to the data line 12 and the pixel electrode 14, respectively. The first electrode of the transistor 13 can be one of a source and a drain, and the second electrode of the transistor 13 can be the other of the source and the drain.

[0087] like Figure 18 As shown, the display panel further includes a common electrode 18, and the liquid crystal is deflected under the voltage difference between the pixel electrode 14 and the common electrode 18. The pixel electrode 14 and the common electrode 18 can form a storage capacitor Cst. Figure 18 The equivalent capacitance of the liquid crystal is marked as Clc.

[0088] like Figure 18 As shown, when the first gate line 111 is multiplexed as the first temperature sensor 161, the first detection voltage in the above step S1 is a voltage that can control the transistor 13, whose gate is electrically connected to the first gate line 111, to turn off. Based on this setting, when performing temperature detection, it is possible to prevent the first temperature sensor 161 from controlling the transistor 13 to turn on, thereby preventing the sub-pixel 10 from being incorrectly charged. While the first gate line 111 is multiplexed as the first temperature sensor 161, the structure of the display panel is simplified, and display abnormalities caused by temperature detection on the display panel can be avoided.

[0089] Exemplarily, the value of the first detection voltage can be set according to the channel type and structural characteristics of the transistor 13 , as long as the transistor 13 can be controlled to be turned off during the detection period. The embodiment of the present invention does not limit its specific value.

[0090] like Figure 2 and Figure 4As shown, when the first data line 121 is multiplexed as the first temperature sensor 161, the embodiment of the present invention separates the detection period T1 and the display period T2. That is, when the first data line 121 receives the first detection voltage, the gate line 11 provides a signal to turn off the transistor 13. Therefore, the detection voltage on the first data line 121 will not be written to the sub-pixel 10 through the transistor 13. When the first data line 121 is used for temperature detection, the display effect of the display panel can be avoided from being affected. Moreover, based on this setting, while avoiding affecting the display effect, the first detection voltage applied to the first data line 121 can be flexibly adjusted according to the needs of the temperature test, which can improve the flexibility of setting the first detection voltage.

[0091] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, characterized in that: include: A display panel, the display panel comprising a display area, the display area comprising a plurality of data lines, a plurality of gate lines and a first temperature sensor; Adjust the circuit; The adjustment circuit is electrically connected to the first temperature sensor, and the adjustment circuit is used to adjust the data voltage applied to the data line according to the temperature detected by the first temperature sensor; At least one of the data lines is multiplexed as the first temperature sensor; and / or at least one of the gate lines is multiplexed as the first temperature sensor.

2. The display device according to claim 1, wherein The resistance of the first temperature sensor changes with temperature.

3. The display device according to claim 1, wherein At least one of the data lines is multiplexed as a first temperature sensor, and the data line multiplexed as the first temperature sensor includes any one of a straight line, a broken line, and a curve.

4. The display device according to claim 1, wherein At least one of the gate lines is multiplexed as a first temperature sensor, and the gate line multiplexed as the first temperature sensor includes any one of a straight line, a broken line, and a curve.

5. The display device according to claim 1, wherein The display panel further includes a non-display area, the non-display area includes an edge-type backlight source, and an extension line of the first temperature sensor and the edge-type backlight source are staggered.

6. The display device according to claim 5, wherein: The plurality of data lines are arranged along a first direction, and the data lines extend along a second direction; the gate lines extend along the first direction, and the plurality of gate lines are arranged along the second direction; the first direction and the second direction intersect; The non-display area includes a first non-display area and a second non-display area; The first non-display area and the display area are arranged along the first direction, and the second non-display area and the display area are arranged along the second direction; The first non-display area includes the edge-lit backlight source, and at least one of the data lines is multiplexed as the first temperature sensor; or, The second non-display area includes the edge-type backlight source, and at least one of the gate lines is multiplexed as the first temperature sensor.

7. The display device according to claim 1, wherein At least one of the data lines is multiplexed as the first temperature sensor; The plurality of data lines are arranged along a first direction, and the data lines extend along a second direction; the first direction and the second direction intersect; The distance between the data line multiplexed as the first temperature sensor and the first edge of the display panel is d1, the distance between the data line and the second edge of the display panel is d2, the distance between two adjacent data lines is d12, |d1-d2|≤5d12, wherein the first edge and the second edge are the two edges of the display panel in the first direction.

8. The display device according to claim 1, wherein At least one of the gate lines is multiplexed as the first temperature sensor; The gate lines extend along a first direction, and a plurality of the gate lines are arranged along a second direction; the first direction and the second direction intersect; The distance between the gate line multiplexed as the first temperature sensor and the third edge of the display panel is d3, the distance between the gate line and the fourth edge of the display panel is d4, the distance between two adjacent gate lines is d34, |d3-d4|≤5d34, wherein the third edge and the fourth edge are two edges of the display panel in the second direction.

9. The display device according to claim 1, wherein The display panel also includes a second temperature sensor, which includes a metal line. The metal line is insulated from the gate line and the data line. The second temperature sensor is electrically connected to the adjustment circuit. The adjustment circuit is further used to adjust the data voltage applied to the data line according to the temperature detected by the second temperature sensor.

10. The display device according to claim 9, wherein The metal lines are arranged in the same layer as the gate lines or the data lines.

11. The display device according to claim 9, wherein At least a portion of the metal line is located in the display area, and The display panel further includes a black matrix. Along a direction perpendicular to the plane where the display panel is located, the black matrix at least partially overlaps with the metal line.

12. The display device according to claim 1, wherein Also included is a timing controller and a driving chip, wherein the timing controller receives a timing control signal and outputs a plurality of timing driving signals in response to the timing control signal; The driver chip is used to drive the display panel to display; The adjustment circuit and the timing controller are integrated into the driver chip, or the adjustment circuit is independent of the driver chip.

13. A method for driving a display panel, characterized in that: The display panel includes a display area, and the display area includes a plurality of data lines, a plurality of gate lines and a first temperature sensor. At least one of the data lines is multiplexed as the first temperature sensor; and / or, at least one of the gate lines is multiplexed as the first temperature sensor; The driving method includes: applying a first detection voltage to the first temperature sensor; A first electrical signal transmitted by the first temperature sensor is detected, and a data voltage applied to the data line is adjusted according to the first electrical signal.

14. The driving method according to claim 13, wherein: During a detection period, applying a first detection voltage to the first temperature sensor; During a display period, a display voltage is applied to the first temperature sensor, and a data voltage applied to the data line is adjusted.

15. The driving method according to claim 13, wherein: At least one of the gate lines is multiplexed as a first temperature sensor; the display panel further comprises a transistor, a gate of the transistor being electrically connected to the gate line; The first detection voltage controls the transistor to be turned off.

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