Display panel, compensation method and display device

Abstract

The invention provides a display panel, a compensation method and a display device. The display panel comprises a substrate; a first wire and a second wire, wherein the first wire and the second wire are arranged on the same side of the substrate; the two opposite ends of the first wire are electrically connected with the two opposite ends of the second wire; the resistance of the first wire is in positive correlation with the temperature of the first wire, and the resistance of the second wire is in negative correlation with the temperature of the second wire; the resistance of the first wire and the resistance of the second wire are opposite in change trend along with the temperature, the first wire and the second wire are arranged in parallel and form the composite wire, when the temperature of the display panel changes, the resistance change trend of the first wire and the resistance change trend of the second wire are opposite, the difference degree of current signals at different temperatures can be reduced, and the display effect is improved. Good transmission efficiency of the composite wire is ensured, meanwhile, the light-emitting effect of the light-emitting unit is ensured, the product quality is improved, and the satisfaction degree of a user is improved.

Description

Technical Field

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

[0002] With the continuous advancement of display technology, the refresh rate and resolution of display panels continue to improve to meet the growing demand for high-end display devices. As the performance of display panels gradually improves, the heat generated by display panels during operation also gradually increases, causing the temperature of the wiring inside the display panel to rise. Under the influence of temperature, the resistance of some wiring will change; and when the resistance of the wiring changes, it not only affects the transmission efficiency of the current signal inside the display panel, but also affects the luminous effect of the luminous unit, thereby reducing the product quality of the display panel. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a display panel, a compensation method and a display device to solve at least part of the technical problems mentioned in the background technology.

[0004] Based on the above purpose, the present application provides a display panel, including:

[0005] substrate substrate;

[0006] A first routing line and a second routing line, wherein the first routing line and the second routing line are arranged on the same side of the substrate; the opposite ends of the first routing line are electrically connected to the opposite ends of the second routing line; the resistance of the first routing line is positively correlated with the temperature of the first routing line, and the resistance of the second routing line is negatively correlated with the temperature of the second routing line.

[0007] Based on the same inventive concept, the present application also provides a compensation method for a display panel, comprising:

[0008] Determine a target wiring in the display panel, and determine a type of the target wiring according to the acquired resistance of the target wiring and the temperature of the target wiring;

[0009] In response to the target routing being a first routing, determining a compensation current of the first routing according to a compensation voltage of the first routing and a resistance value of the first routing determined by a temperature of the first routing, and regulating a current signal of the first routing based on the compensation current;

[0010] In response to the target routing being the second routing, a compensation current is determined in a preset current compensation relationship according to the temperature of the second routing and the actual current of the second routing obtained, and the current signal of the second routing is regulated based on the compensation current.

[0011] Based on the same inventive concept, the present application also provides a display device, including the display panel as described above.

[0012] From the above, it can be seen that the display panel, compensation method and display device provided by the present application, in which the resistance of the first wiring is positively correlated with its temperature, and the resistance of the second wiring is negatively correlated with its temperature. When the temperature changes, the change trends of the resistances of the two are opposite; therefore, by applying a composite wiring composed of the first wiring and the second wiring in the display panel, and connecting the two in parallel, when the display panel heats up, the resistance of the first wiring increases and the resistance of the second wiring decreases. At this time, the composite wiring can effectively distribute and reasonably regulate the transmitted current signal, reduce the degree of difference of the current signal at different temperatures, ensure that the composite wiring has good transmission efficiency, ensure the light-emitting effect of the light-emitting unit, and help maintain the stability of the display performance of the display panel, improve product quality, and increase user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A schematic diagram of the structure of a first routing line and a second routing line stacked on a substrate in the present application;

[0015] Figure 2A-2F for Figure 1 A cross-sectional view of the first and second traces;

[0016] Figure 3 A schematic diagram of the structure of a first routing line and a second routing line arranged on the same layer of a substrate in the present application;

[0017] Figure 4A-4D for Figure 3 A cross-sectional view of the first and second traces;

[0018] Figure 5 It is a schematic diagram of the structure of the display panel in this application;

[0019] Figure 6 A schematic diagram of the connection relationship between the driver chip and the first wiring in this application;

[0020] Figure 7 A schematic diagram of the connection relationship between the driver chip and the second wiring in this application;

[0021] Figure 8A schematic diagram showing the relationship between the resistance of the first trace and its temperature in this application;

[0022] Fig. 9 A schematic diagram showing the relationship between the resistance of the second trace and its temperature in this application;

[0023] Fig.10 A flow chart of a compensation method for a display panel in this application;

[0024] Fig.11 This is a flow chart of the method for determining the target antenna in this application.

[0025] Description of reference numerals:

[0026] 100. substrate;

[0027] 201, first wiring; 202, second wiring; 210, first wiring terminal; 220, second wiring terminal;

[0028] 300, driver chip; 301, first pin; 302, second pin;

[0029] 410, dielectric layer; 420, planar layer; 430, pixel defining layer;

[0030] 510, drain line; 520, source line; 530, first gate line; 540, second gate line; 550, third gate line;

[0031] 610, anode; 620, light-emitting unit. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] As for the display panel, the display panel is provided with wirings with different functions, which are responsible for transmitting various functional signals, and transmitting them in the form of electric current in the wirings, so as to realize the display and transmission of image information; illustratively, the display panel is usually provided with at least one connecting wiring such as gate line, source line, power line, signal line and ground line; specifically, the gate line is used to control the switching state of the pixel, and can be formed of metal materials such as aluminum, molybdenum or titanium; the source line is used to transmit data signals to the pixel to realize the regulation of the brightness and color of the pixel, and can be formed of metal materials such as aluminum, molybdenum or titanium; the power line can provide the necessary power supply for the display panel, and can be formed of metal materials with good conductivity such as aluminum or copper; the signal line is used to transmit the control signal in the display panel, and can be formed of metal materials such as aluminum, molybdenum or titanium; the ground line can timely conduct the electrostatic charge of the display panel, reduce the electromagnetic interference of the electrostatic charge on the display panel, and can be made of metals with good conductivity such as aluminum or copper, so that the display panel has good display performance.

[0036] With the gradual enhancement of the performance of the display panel and / or the long-term use of the display panel, the heat generated by the display panel during operation also gradually increases, which in turn causes the overall temperature of the display panel to rise, and therefore the temperature of some wiring distributed inside the display panel also rises accordingly; affected by the wiring material, when the wiring temperature changes, the resistance of some wiring will also change accordingly; specifically, with regard to the connecting wirings such as the gate line, source line, power line, signal line and ground line in the display panel, since the aforementioned connecting wirings are usually formed of metal materials such as aluminum, copper and titanium, and the resistance of metal materials such as aluminum, copper and titanium is positively correlated with temperature, as the temperature of the display panel increases, the resistance of the wiring also increases accordingly; when the resistance of the wiring changes, it will not only affect the transmission efficiency of the current signal inside the display panel, causing signal delay or distortion, but may also affect the normal light-emitting effect of the light-emitting unit, such as uneven brightness or color deviation, thereby affecting the product quality of the display panel and the stability of the display performance, and even shortening the service life of the display panel.

[0037] In order to reduce the influence of temperature on the wiring in the display panel, the electrical parameter compensation method can be used to compensate the current transmitted by the wiring; as for the wiring in the display panel, there are two main compensation methods. One is to set a preset compensation current for the display panel to compensate for the current in the wiring. During the use of the display panel, its temperature will change with time. Therefore, the display data of different areas of the display panel can be obtained in different time periods, and then regional compensation can be performed according to the differences between the display data of different areas. However, this compensation method requires a large number of tests on the display panel and a large amount of test data. At the same time, it has high requirements on the manufacturing process of the display panel and is easily disturbed by external factors. Therefore, the accuracy of the compensation is low; the other is to add a feedback circuit in the pixel driving circuit and adjust the driving voltage in combination with the control chip, but this compensation method will increase the structural complexity of the driving circuit and have high requirements on the external control chip, so it is difficult to control the preparation cost of the display panel.

[0038] In view of this, the present application provides a display panel, including a base substrate 100, a first wiring 201 and a second wiring 202; the first wiring 201 and the second wiring 202 are arranged on the same side of the base substrate 100; the opposite ends of the first wiring 201 are electrically connected to the opposite ends of the second wiring 202; the resistance of the first wiring 201 is positively correlated with the temperature of the first wiring 201, and the resistance of the second wiring 202 is negatively correlated with the temperature of the second wiring 202.

[0039] The present application provides a display panel that can reduce the impact of temperature changes on its display effect; Figure 1-Figure 5 As shown, the display panel includes a base substrate 100. As for the base substrate 100, the base substrate 100 can provide a corresponding preparation area for the film layer structure and wiring in the display panel, and is also used to support and protect the film layer structure, the first wiring 201 and the second wiring 202.

[0040] It should be noted that the base substrate 100 is further explained in combination with the above-mentioned embodiment; the base substrate 100 can be formed of one of the materials such as glass, polyimide or optical quartz to improve the support and protection effect of the membrane layer structure, the first wiring 201, the second wiring 202 and other components in the display panel, which will not be repeated here.

[0041] The display panel further includes a first wiring 201 and a second wiring 202, wherein the opposite ends of the first wiring 201 and the opposite ends of the second wiring 202 are electrically connected, so that the two constitute a composite wiring, and the opposite ends of the composite wiring can be electrically connected to at least two different components respectively, so as to achieve stable transmission of current signals; specifically, the first wiring 201 and the second wiring 202 are both arranged on one side of the substrate 100, and the opposite ends of the first wiring 201 are electrically connected to the opposite ends of the second wiring 202, so that the first wiring 201 and the second wiring 202 are connected in parallel, which can shunt the input current signal and converge the output current. , to ensure stable transmission of current; illustratively, when the composite routing formed by the first routing 201 and the second routing 202 is used to transmit the current signal, one end of the composite routing can be used as the input end, and the other end can be used as the output end; when the current signal is input from the input end of the composite routing, the first routing 201 and the second routing 202 can shunt the current signal and transmit the current signal to the output end of the composite routing for convergence output; therefore, by electrically connecting the opposite ends of the first routing 201 with the opposite ends of the second routing 202, the problem of the inability to transmit the current signal when one of the routing fails can be avoided, thereby improving the overall quality of the product.

[0042] In addition, as far as the first wiring 201 and the second wiring 202 are concerned, there is a positive correlation between the resistance of the first wiring 201 and its temperature, that is, the resistance of the first wiring 201 increases with the increase of temperature and decreases with the decrease of temperature; there is a negative correlation between the resistance of the second wiring 202 and its temperature, that is, the resistance of the second wiring 202 decreases with the increase of temperature and increases with the decrease of temperature; more specifically, when the operating power of the display panel is high and / or the operating time is long, the temperature of the display panel continues to rise, so the temperature of the first wiring 201 and the second wiring 202 inside the display panel also increases accordingly; and when the display panel is at a high temperature, the current signal is processed. During transmission, the resistance of the first wiring 201 increases, and the transmission capacity of the current signal is weakened; while the resistance of the second wiring 202 decreases, and the transmission capacity of the current signal is enhanced. Therefore, when the composite wiring is used to transmit the current signal, as the temperature increases, the current transmitted by the first wiring 201 becomes smaller, and the current transmitted by the second wiring 202 becomes larger, so that the current signal reduced by the first wiring 201 is compensated by the current signal increased by the second wiring 202, thereby reducing the degree of interference of temperature on the current signal, and reducing the degree of difference in the current signal output at different temperatures, which is beneficial to improving the transmission efficiency of the functional signal transmission in the display panel and improving the light effect of the light-emitting unit 620.

[0043] For example, taking the composite wiring including a first wiring 201 and a second wiring 202 as an example, in the display panel, the wiring specifications are usually: a cross-sectional width of 50-100um, an interface thickness of 0.2-0.3um, therefore, the first wiring 201 and the second wiring 202 with a cross-sectional width of 80μm and a thickness of 0.25μm can be used, and platinum and copper oxide are used to form the first wiring 201 and the second wiring 202 respectively; since the opposite ends of the first wiring 201 and the opposite ends of the second wiring 202 are electrically connected respectively, the first wiring 201 and the second wiring 202 are arranged in parallel, at this time, the total resistance of the composite wiring can be calculated, and the stability of the current signal can be judged by comparing the degree of change of the total resistance of the resistance under different temperatures;

[0044] For example: When the operating temperature of the display panel is 25°C, Figure 8 and Fig. 9 As shown, the resistance value of the first wiring 201 is about 130Ω, and the resistance value of the second wiring 202 is about 1000Ω. The resistance of the composite wiring at 25°C can be calculated according to the total resistance calculation formula of the parallel resistor, that is:

[0045]

[0046] Among them, R 25℃ is the total resistance of the composite trace at 25°C, R 1 is the resistance of the first trace 201 at 25°C, R 2 is the resistance of the second trace 202 at 25°C. Based on the above formula, R 25℃ The resistance is about 115.04Ω;

[0047] For example: When the operating temperature of the display panel is 55°C, Figure 8 and Fig. 9 As shown, the resistance value of the first wiring 201 is about 136Ω, and the resistance value of the second wiring 202 is about 580Ω. According to the total resistance calculation formula of the parallel resistor, the resistance value of the composite wiring at 50°C can be calculated, that is:

[0048]

[0049] Among them, R 50℃ is the total resistance of the composite trace at 50°C, R 1′ is the resistance of the first trace 201 at 50°C, R 2′ is the resistance of the second trace 202 at 50°C. Based on the above formula, R 50℃ The resistance is about 110.17Ω;

[0050] Therefore, it can be seen from the above that the total resistance of the composite line composed of the first line 201 and the second line 202 at different temperatures is relatively small (the resistance change of the display panel is about 4.87Ω when it is at 25°C and 55°C), so it is less affected by temperature changes. Therefore, the current signal output by the composite line is relatively stable.

[0051] Therefore, for the display panel provided in the present application, in the display panel, the resistance of the first wiring 201 is positively correlated with its temperature, and the resistance of the second wiring 202 is negatively correlated with its temperature. When the temperature changes, the change trends of the resistances of the two are opposite; therefore, by applying a composite wiring composed of the first wiring 201 and the second wiring 202 in the display panel, and connecting the two in parallel, when the display panel heats up, the resistance of the first wiring 201 increases and the resistance of the second wiring 202 decreases. At this time, the composite wiring can effectively distribute and reasonably regulate the transmitted current signal, reduce the degree of difference in the current signal at different temperatures, ensure that the composite wiring has good transmission efficiency, and ensure the light-emitting effect of the light-emitting unit 620, which is conducive to maintaining the stability of the display performance of the display panel, improving product quality, and improving user satisfaction.

[0052] In combination with the above-mentioned embodiment, the first wiring 201 and the second wiring 202 are further described. As for the display panel provided by the present application, the gate line, the source line 520, the power line, the signal line and the ground line in the display panel can all adopt the composite wiring formed by combining the first wiring 201 and the second wiring 202 provided by the present application. Figure 5 As shown;

[0053] Exemplarily, the gate driving signal transmitted by the gate line is a current signal. Since the display effect and manufacturing process of the display panel are different, different gate lines can be set inside the display panel, such as Figure 5 The first gate line 530, the second gate line 540 and the third gate line 550 are shown; when the gate line adopts the composite routing to transmit the gate driving signal, it can reduce the interference of the current signal transmitted by the gate line when the display panel is heated up, reduce the degree of change of the current signal of the gate line during the temperature change process, improve the transmission performance of the gate line for the current signal, and improve the stability of the pixel control during the display process.

[0054] Exemplarily, the source line 520 is the data line of the display panel, and the data signal it transmits is a type of current signal; when the source line 520 uses the composite routing to transmit the data signal, it can reduce the impact of the display panel heating up on the source line 520 and improve the source line 520's ability to regulate the color of the display panel at different temperatures.

[0055] Exemplarily, the power line transmits current to components in the display panel. When the power line adopts the composite routing, the power line can provide stable power to the display panel at different temperatures, thereby improving the stability of the operation of the display panel.

[0056] In some embodiments, the display panel includes, in addition to the base substrate 100, a buffer layer, a dielectric layer 410, a flat layer 420, a pixel defining layer 430 and an encapsulation layer, as shown in FIG. Figure 5 As shown;

[0057] Specifically, the buffer layer can be arranged on one side of the base substrate 100 and play a barrier role to prevent water and oxygen molecules in the external environment from diffusing into the display panel and affecting its service life, and can prevent impurities in the base substrate 100 from diffusing into the active layer (not marked in the figure) in the TFT (Thin Film Transistor) in the display panel, ensuring a good connection between the active layer and the source line 520 and the drain line 510; wherein, the buffer layer can be formed of silicon oxide or silicon nitride, which has low cost and good barrier performance, and will not be repeated here.

[0058] Specifically, the dielectric layer 410 can be arranged on the side of the buffer layer away from the base substrate 100, and is used to encapsulate and insulate the wiring and TFT distributed on one side of the base substrate 100, thereby protecting the wiring and components such as TFT; wherein, the buffer layer can be formed of materials such as silicon oxide or silicon nitride, which is beneficial to improving the chemical stability and thermal stability of the display panel, which will not be repeated here.

[0059] Specifically, the flat layer 420 can be arranged on the side of the dielectric layer 410 away from the base substrate 100, and at least two layers can be arranged, which can be used for flattening the raised or recessed areas on the surface of the dielectric layer 410; wherein the thickness of the flat layer 420 can be set to any value between 1.5μm-2μm, and can be formed of materials such as polyimide, epoxy resin, polyacrylate, polyamide and siloxane resin, which will not be repeated here.

[0060] Specifically, the pixel defining layer 430 is arranged on the side of the flat layer 420 away from the base substrate 100; the pixel defining layer 430 array has a plurality of openings, each of which is provided with a light-emitting unit 620, and each light-emitting unit 620 is electrically connected to an anode 610, so as to be blocked by the pixel defining layer 430 and serve as the main light source of the display panel; wherein the material of the pixel defining layer 430 may include organic insulating materials such as polyimide, polyimide, polyphthalamide, acrylic resin, benzocyclobutene or phenolic resin; in addition, a spacer (not marked in the figure) may be further provided on the side of the pixel defining layer 430 away from the base substrate 100, and the material of the spacer may be the same as that of the pixel defining layer 430, which will not be repeated here.

[0061] In some embodiments, the first routing line 201 and the second routing line 202 are stacked; one of the first routing line 201 and the second routing line 202 is disposed on one side of the base substrate 100, and the orthographic projection of the first routing line 201 on the base substrate 100 and the orthographic projection of the second routing line 202 on the base substrate 100 at least partially overlap.

[0062] The display panel continuously generates heat during operation, causing the temperature of the display panel to rise and affecting the transmission efficiency of the current signal in the display panel. By using the composite wiring composed of the first wiring 201 and the second wiring 202 in the display panel, the difference in the current signal at different temperatures can be reduced, and the stability of the current signal transmission can be improved. Specifically, in any composite wiring, such as Figure 1-2F As shown, the first routing line 201 and the second routing line 202 are arranged on the same side of the base substrate 100 and are stacked, that is, the first routing line 201 and the second routing line 202 can be stacked along the thickness direction of the first routing line 201; and the orthographic projection of the first routing line 201 on the base substrate 100 and the orthographic projection of the second routing line 202 on the base substrate 100 at least partially overlap, at this time, one of them is located on one side of the base substrate 100, and the other is arranged on the side of the routing line away from the base substrate 100; by stacking the first routing line 201 and the second routing line 202, the space occupied by the first routing line 201 and the second routing line 202 can be optimized, and the electromagnetic interference to the routing lines and components arranged around the first routing line 201 and the second routing line 202 can be reduced; at the same time, the stacked wiring method can also optimize the signal transmission path and avoid routing conflicts and other problems during the wiring process.

[0063] The wiring positions of the first wiring 201 and the second wiring 202 can be determined according to factors such as the material and size of the first wiring 201 and the second wiring 202. Figure 2A-2E As shown;

[0064] For example, taking the composite wiring including a first wiring 201 and a second wiring 202 as an example, the second wiring 202 can be formed on one side of the base substrate 100 by combining the patterning process and the deposition process, and then the first wiring 201 is formed on the side of the second wiring 202 away from the base substrate 100 by the patterning process and the deposition process, so that the first wiring 201 and the second wiring 202 are stacked. Figure 2A As shown; in addition, when the size of the first wiring 201 is large, the first wiring 201 can be formed on the side of the second wiring 202 away from the base substrate 100, and the orthographic projection of the first wiring 201 on the base substrate 100 is made to overlap with the orthographic projection of the second wiring 202 on the base substrate 100 at least partially, such as the first wiring 201 can wrap at least part of the second wiring 202, when the current signal in the second wiring 202 is much larger than the current signal in the first wiring 201 (that is, when the display panel works under high temperature conditions), the first wiring 201 can also serve as a shielding layer for the second wiring 202, and the first wiring 201 can electromagnetically shield the second wiring 202, thereby improving the stability of the second wiring 202 to the current signal transmission, as shown in FIG. Figure 2C shown.

[0065] For example, taking the composite wiring including a first wiring 201 and a second wiring 202 as an example, the first wiring 201 can be formed on one side of the base substrate 100 by combining the patterning process and the deposition process, and then the second wiring 202 is formed on the side of the first wiring 201 away from the base substrate 100 by the patterning process and the deposition process, so that the second wiring 202 is stacked with the first wiring 201. Figure 2D As shown; in addition, when the size of the second wiring 202 is large, the second wiring 202 can be formed on the side of the first wiring 201 away from the base substrate 100, and the orthographic projection of the second wiring 202 on the base substrate 100 is made to at least partially overlap with the orthographic projection of the first wiring 201 on the base substrate 100, such as the second wiring 202 can wrap at least part of the first wiring 201, when the current signal in the first wiring 201 is much larger than the current signal in the second wiring 202 (that is, when the display panel works under low temperature conditions), the second wiring 202 can also serve as a shielding layer for the first wiring 201, and the second wiring 202 can electromagnetically shield the first wiring 201, thereby improving the stability of the first wiring 201 to the current signal transmission, as shown in FIG. Figure 2E shown.

[0066] It should be noted that, with respect to the stacked first routing 201 and the second routing 202, since the two opposite ends of the first routing 201 and the two opposite ends of the second routing 202 are electrically connected, the first routing 201 can be arranged in the same film layer or in different film layers; when the two are arranged in the same film layer, the first routing 201 can be arranged closely or at intervals; and when the first routing 201 and the second routing 202 are arranged at intervals, the two can be electrically connected through a transfer hole (not marked in the figure), which will not be repeated here.

[0067] In some embodiments, the first routing line 201 and the second routing line 202 are disposed on the same layer; the orthographic projection of the first routing line 201 on the base substrate 100 does not overlap with the orthographic projection of the second routing line 202 on the base substrate 100 .

[0068] In order to reduce the influence of temperature on the display panel and reduce the difference of current signals at different temperatures, a composite wiring composed of a first wiring 201 and a second wiring 202 may be applied in the display panel; Figure 3-4D As shown, in any composite routing, the first routing 201 and the second routing 202 are located on the same side of the base substrate 100 and are arranged on the same layer, and the orthographic projection of the first routing 201 on the base substrate 100 does not overlap with the orthographic projection of the second routing 202 on the base substrate 100. At this time, the first routing 201 and the second routing 202 can be distributed in parallel on the base substrate 100, which is beneficial to reduce the wiring difficulty of the first routing 201 and the second routing 202 on the base substrate 100 and control the production cost of the display panel; in addition, the routing distributed on the same layer is more intuitive, which is beneficial to debugging the display panel before leaving the factory and is also convenient for maintaining the display panel.

[0069] It should be noted that, in combination with the above embodiment, the first routing line 201 and the second routing line 202 are further described. When the first routing line 201 is arranged in the same layer and distributed in parallel, there may be a gap between the first routing line 201 and the second routing line 202. Figure 4A As shown, the interference between the first line 201 and the second line 202 can be reduced, the transmission quality of the current signal can be improved, and the signal reflection and distortion can be reduced; or the first line 201 and the second line 202 can be set closely, as shown in FIG. Figure 4B As shown, it is helpful to reduce the difficulty of preparing the wiring in the display panel, improve the utilization of space, reduce the generation of parasitic capacitance, and thus improve the signal transmission speed and efficiency.

[0070] In some embodiments, at least two of at least one of the first routing line 201 and the second routing line 202 are provided, and the first routing line 201 and the second routing line 202 are arranged at intervals.

[0071] In order to reduce the influence of temperature on the current signal transmission efficiency, the first wiring 201 and the second wiring 202 need to simultaneously apply and transmit the same current signal; Figure 2C , 2F , 4C and Figure 4D As shown, the composite routing may include at least one first routing 201 and at least one second routing 202, so that the composite routing is suitable for current signals of different sizes. For example, when the transmitted current is too large, the number of the first routing 201 and / or the second routing 202 can be increased according to the actual situation and transmission requirements, thereby improving the composite routing's transmission capacity for current signals; and for the first routing 201 and the second routing 202, at least one of the two is provided with at least two, and the first routing 201 and the second routing 202 are arranged at intervals, which can reduce the degree of electromagnetic coupling between the same routings, reduce electromagnetic radiation, reduce interference to surrounding components, and help improve the transmission quality of current signals, reduce the occurrence of problems such as signal reflection and distortion; at the same time, the interval distribution can make the first routing 201 and the second routing 202 distributed more orderly and regular, reduce conflicts and intersections between routings, simplify the wiring process, and improve the manufacturability and maintainability of the design.

[0072] In some embodiments, a first wiring terminal 210 and a second wiring terminal 220 are provided at opposite ends of the first wiring 201 and the second wiring 202; the first wiring terminal 210 of the first wiring 201 is electrically connected to the first wiring terminal 210 of the second wiring 202, and the second wiring terminal 220 of the first wiring 201 is electrically connected to the second wiring terminal 220 of the second wiring 202.

[0073] As for the first wiring 201 and the second wiring 202, the first wiring 201 and the second wiring 202 need to be used at the same time and transmit the same current signal; Figure 1 and Figure 3 As shown, the first wiring 201 is provided with a first terminal 210 and a second terminal 220 at two opposite ends, and the second wiring 202 is provided with a first terminal 210 and a second terminal 220 at two opposite ends. When the first wiring 201 and the second wiring 202 are connected in parallel, the first terminal 210 of the first wiring 201 can be electrically connected to the first terminal 210 of the second wiring 202, and the second terminal 220 of the first wiring 201 can be electrically connected to the second terminal 220 of the second wiring 202, so as to improve the quality of the composite wiring formed by the first wiring 201 and the second wiring 202; wherein, one of the first terminal 210 and the second terminal 220 can be used as an input terminal, and the other can be used as an output terminal, so as to realize the transmission of the current signal.

[0074] In some embodiments, the display panel also includes a driver chip 300; wherein the driver chip 300 is electrically connected to the first terminal 210 of the first wiring 201 through the first pin 301, and is electrically connected to the second terminal 220 of the first wiring 201 through the second pin 302, and is configured to detect the voltage of the first wiring 201, and is also configured to compensate and regulate the current of the first wiring 201 according to the voltage of the first wiring 201; or, the driver chip 300 is electrically connected to the first terminal 210 of the second wiring 202 through the first pin 301, and is electrically connected to the second terminal 220 of the second wiring 202 through the second pin 302, and is configured to detect the current of the second wiring 202, and is also configured to compensate and regulate the current of the first wiring 201 according to the current of the first wiring 201.

[0075] For the display panel, by applying a composite routing consisting of a first routing 201 and a second routing 202 in the display panel, the stability of the current signal transmission of the display panel at different temperatures can be ensured, and the interference of temperature on the current signal can be reduced; in addition, when the composite routing is used to transmit the current signal, since the first routing 201 and the second routing 202 have resistance, current loss will occur in the current signal during the transmission process, thereby affecting the transmission quality of the current signal; at this time, the composite routing can be electrically connected to a driver chip 300, and the driver chip 300 can be used to detect and compensate for the current transmitted by the composite routing to compensate for the loss of the current signal during the transmission process, thereby improving the transmission quality of the current signal, which is beneficial to improving the control accuracy of the pixel and improving the light efficiency of the light-emitting unit 620, thereby further improving the product quality of the display panel.

[0076] For example, Figure 6As shown in the figure, as for the driver chip 300, the driver chip 300 is provided with a plurality of functional pins; wherein, the first pin 301 of the driver chip 300 can be electrically connected to the first terminal 210 of the first wiring 201, and the second pin 302 thereof can be electrically connected to the second terminal 220 of the first wiring 201; since the resistance of the first wiring 201 is positively correlated with the temperature of the first wiring 201, when the temperature of the display panel rises, the resistance of the first wiring 201 increases with the increase of the temperature, so it is easier to measure the voltage of the first wiring 201; by making the first pin 301 and the second pin 302 of the driver chip 300 separate The first wiring terminal 210 and the second wiring terminal 220 of the first wiring 201 are electrically connected to each other, so that the driving chip 300 is arranged in parallel with the first wiring 201, and the current voltage of the first wiring 201 can be obtained and used as the compensation voltage; after the voltage of the first wiring 201 is obtained, the corresponding compensation current can be determined according to the resistance of the first wiring 201 at the temperature, and the current signal transmitted by the first wiring 201 is compensated and regulated based on the compensation current to compensate for the loss of the current signal in the transmission process to prevent problems such as signal distortion, thereby improving the accuracy of the display panel control and the product quality of the display panel.

[0077] For example, Figure 7 As shown, the first pin 301 of the driver chip 300 is electrically connected to the first wiring terminal 210 of the second wiring 202, and the second pin 302 is electrically connected to the second wiring terminal 220 of the second wiring 202; since the resistance of the second wiring 202 is negatively correlated with the temperature of the second wiring 202, when the display panel is heated, the resistance of the second wiring 202 decreases with the increase of temperature, so it is easier to measure the current of the second wiring 202; by making the first pin 301 and the second pin 302 of the driver chip 300 respectively connected to the second wiring terminal 220 of the first wiring 201 The terminal 220 is electrically connected to the second connection terminal 220 of the second wiring 202, so that the driving chip 300 and the second wiring 202 are arranged in series, and the current current signal of the second wiring 202 can be directly obtained; according to the current temperature and resistance, the pre-set compensation current can be called in the driving chip 300, and the current current signal transmitted by the second wiring 202 is compensated and regulated based on the compensation current to compensate for the loss of the current signal in the transmission process to prevent problems such as signal distortion, thereby improving the accuracy of the control of the display panel and the product quality of the display panel.

[0078] In some embodiments, the first trace 201 is formed of a first metal, and the second trace 202 is formed of an oxide of a second metal, wherein the first metal is different from the second metal.

[0079] As far as the display panel is concerned, the resistance of the first routing 201 is positively correlated with its temperature, that is, when the temperature of the first routing 201 rises, the resistance of the first routing 201 will also increase; the resistance of the second routing 202 is negatively correlated with its temperature, that is, when the temperature of the second routing 202 rises, the resistance of the second routing 202 decreases. Therefore, by applying a composite routing composed of the first routing 201 and the second routing 202, the interference of temperature on the composite routing can be reduced, and the stability of the composite routing to the current signal output can be improved.

[0080] Specifically, since the resistance of the first wiring 201 and the second wiring 202 have opposite trends in change with temperature, the first metal can be used to form the first wiring 201, and the oxide of the second metal can be used to form the second wiring 202; when the temperature of the display panel is high, the first metal may be oxidized under high temperature conditions and form the oxide of the first metal. If the first metal is the same as the second metal, and the first wiring 201 and the second wiring 202 are stacked (or arranged side by side and close to each other), the composition ratio of the first wiring 201 and the second wiring 202 will be changed, so that the size of the first wiring 201 is reduced and the size of the second wiring 202 is increased, thereby affecting the structure of the composite wiring formed by the first wiring 201 and the second wiring 202, and affecting its stability in current signal transmission; therefore, by setting the first metal and the second metal to different metals, the degree of change of the composite wiring at high temperature can be reduced, and the stability of the first wiring 201 and the second wiring 202 in current transmission can be improved to ensure its transmission effect on current signals.

[0081] In some embodiments, the first metal includes at least one of aluminum, copper, molybdenum, titanium, chromium, silver, neodymium, platinum, tungsten and gold; and the second metal includes at least one of copper, cobalt, nickel, titanium and zinc.

[0082] Specifically, the first wiring 201 can be formed of a first metal. When the first metal includes at least one of aluminum, copper, molybdenum, titanium, platinum, chromium, silver, neodymium, tungsten and gold, the application requirements of the first wiring 201 in the display panel can be met. In addition, the first metal mentioned above has good stability and is not easily oxidized when the display panel is at a high temperature, so the oxidation speed is slow. For example, Figure 8 As shown, the first wiring 201 can be formed of platinum. When the temperature of the display panel increases, the temperature of the first wiring 201 also increases. At this time, the resistance of the first wiring 201 decreases, which will not be repeated here.

[0083] Specifically, the second wiring 202 can be formed of an oxide of the second metal. Therefore, when the second metal includes at least one of copper, cobalt, nickel, titanium and zinc, its oxide can be at least one of copper oxide, cobalt oxide, nickel oxide, titanium oxide and zinc oxide, that is, the second wiring 202 can be formed of at least one of copper oxide, cobalt oxide, nickel oxide, titanium oxide and zinc oxide, which can meet the application requirements of the second wiring 202 in the display panel, and has strong stability and is not easy to change at high temperature; for example, Figure 8 As shown, the second wiring 202 can be formed of copper oxide. When the temperature of the display panel increases, the temperature of the second wiring 202 also increases. At this time, the resistance of the second wiring 202 decreases, which will not be repeated here.

[0084] It should be noted that since the first metal and the second metal are different, when the material forming the first wiring 201 includes copper, the material forming the second wiring 202 does not include copper oxide; when the material forming the second wiring 202 includes copper oxide, the material forming the first wiring 201 does not include copper; similarly, when the material forming the first wiring 201 includes titanium, the material forming the second wiring 202 does not include titanium oxide; similarly, when the material forming the second wiring 202 includes titanium oxide, the material forming the first wiring 201 does not include titanium, which will not be repeated here.

[0085] Based on the same inventive concept, the present application also provides a compensation method for a display panel, such as Fig.10 , with the controller of the display panel as the execution body; the compensation method includes:

[0086] S100: determining a target wiring in the display panel, and determining a type of the target wiring according to the acquired resistance of the target wiring and the temperature of the target wiring;

[0087] In this step, a plurality of routing lines are arranged in the display panel, and the controller can determine a composite routing line having the function of transmitting a current signal from the plurality of routing lines; wherein the composite routing line can include at least one first routing line 201 and at least one second routing line 202, and the controller is used to obtain the resistance and temperature of the target routing line. After obtaining the resistance and temperature of the target routing line, the type of the target routing line can be determined according to the change trend of the resistance and temperature of the target routing line, so as to compensate for the current signal transmitted by the target routing line according to the type of the target routing line.

[0088] S200: In response to the target routing being the first routing 201, determining a compensation current of the first routing 201 according to a compensation voltage of the first routing 201 and a resistance value of the first routing 201 determined by a temperature of the first routing 201, and regulating a current signal of the first routing 201 based on the compensation current;

[0089] In this step, after obtaining the resistance and temperature of the target routing, the controller can determine the type of the target routing according to the resistance and temperature of the target routing; in specific implementation, when the controller determines that the target routing is the first routing 201, the controller can obtain the compensation voltage of the target routing, that is, the actual voltage applied to the target routing, and can determine the resistance of the first routing 201 at the current temperature according to the current temperature of the first routing 201, and can determine the compensation current according to the compensation voltage and the resistance of the first routing 201 at the current temperature, and use the controller to regulate and compensate the current signal of the first routing 201 according to the compensation current, so as to adjust the current signal in the first routing 201 to the compensation current; thereby reducing the degree of difference in the output current signal.

[0090] Exemplarily, the first wiring 201 may be formed of platinum; when the temperature of the first wiring 201 is 25° C., Figure 8 As shown, the resistance of the first line 201 at this temperature is about 130Ω. At this time, the compensation voltage of the first line 201 obtained by the controller is 8.99V. Based on Ohm's law, it can be calculated that the compensation current of the first line 201 at this temperature is 69.15mA, and then the current signal in the first line 201 is adjusted to 69.15mA by the controller; when the temperature of the first line 201 is 55℃, as shown in FIG. Figure 8 As shown, the resistance of the first routing line 201 at this temperature is about 136Ω. At this time, the compensation voltage of the first routing line 201 obtained by the controller is 9.01V. Based on Ohm's law, it can be calculated that the compensation current of the first routing line 201 is 66.25mA, and then the compensation current in the first routing line 201 is adjusted to 66.25mA by the controller, which will not be repeated here.

[0091] S300: In response to the target routing being the second routing 202, a compensation current is determined in a preset current compensation relationship according to the temperature of the second routing 202 and the actual current of the second routing 202 obtained, and a current signal of the second routing 202 is regulated based on the compensation current.

[0092] In this step, when the controller determines that the target route is the second route 202, the controller can obtain the compensation current of the target route, and use the controller to regulate and compensate the current signal of the second route 202 to adjust the current signal in the second route 202 to the compensation current, thereby reducing the degree of difference in the output current signal.

[0093] Exemplarily, when the first routing line 201 is formed of copper oxide, the preset current compensation relationship can refer to Table 1; when the voltage applied to the composite routing line is 9V and the temperature of the first routing line 201 is 25°C, the resistance of the first routing line 201 is approximately 1000Ω. At this time, based on Table 1, the current signal in the second routing line 202 can be compensated according to compensation level 1, so that the current signal in the second routing line 202 can be adjusted to 9mA through the controller; when the temperature of the second routing line 202 rises by 55°C and the resistance of the second routing line 202 is approximately 580Ω, at this time, based on Table 1, the current signal in the second routing line 202 can be compensated according to compensation level 4, so that the compensation current in the second routing line 202 can be adjusted to 15.52mA through the controller, which will not be repeated here.

[0094] Table 1

[0095] Temperature(℃) Resistance (kΩ) Compensation current (mA) Compensation level 25 1 9 1 35 0.89 10.11 2 45 0.77 11.69 3 55 0.58 15.52 4

[0096] In addition, it can be seen from the above embodiments that the current transmitted by the composite routing formed by the first routing 201 and the second routing 202 is the sum of the currents of the two. After regulation and compensation by the controller, when a voltage of 9V is applied, at 25°C, the current signal output by the composite routing is 78.15mA, and at 55°C, the current signal output by the composite routing is 81.77mA. Therefore, the difference in the current signal output by the composite routing is relatively small and relatively stable.

[0097] In some embodiments, for S100, if Fig.11 As shown, the type of the target routing line is determined according to the acquired resistance of the target routing line and the temperature of the target routing line, including:

[0098] S110: judging the type of the target wiring according to the acquired relationship between the resistance of the target wiring and the temperature of the target wiring;

[0099] In this step, after the controller obtains the resistance and temperature of the target routing, it can determine the type of the target routing based on the relationship between the obtained resistance and temperature of the target routing; in specific implementation, the type of the target routing can be determined based on the changing trend of the resistance of the target routing and its temperature.

[0100] S120: In response to the resistance of the target routing line being positively correlated with the temperature of the target routing line, the target routing line is the first routing line 201;

[0101] In this step, when the controller determines that the acquired resistance of the target routing is positively correlated with the temperature of the target routing, that is, the resistance of the target routing increases with increasing temperature, then the target routing is determined to be the first routing 201. At this time, the compensation current of the first routing 201 can be determined based on the compensation voltage of the first routing 201 and the resistance value of the first routing 201 determined by the temperature of the first routing 201.

[0102] S130 : In response to the fact that the resistance of the target routing line is negatively correlated with the temperature of the target routing line, the target routing line is the second routing line 202 .

[0103] In this step, when the controller determines that the acquired resistance of the target routing is negatively correlated with the temperature of the target routing, that is, the resistance of the target routing decreases with increasing temperature, then the target routing is determined to be the second routing 202. At this time, the compensation current can be determined in the preset current compensation relationship based on the temperature of the second routing 202 and the actual current of the second routing 202 acquired.

[0104] Based on the same inventive concept, the present application also provides a display device, including a display panel as described in any one of the above embodiments. Specifically, since the display device uses the display panel described above, it has all the advantages and beneficial effects of the display panel; illustratively, since the display device includes the above display panel, the display device can have all the functions and advantages of the above display panel, so the display device can be applied to display devices with display functions such as vehicle displays, advertising display boards, self-service counters, smart watches and mobile phones, which will not be repeated here.

[0105] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0106] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0107] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0108] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0109] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0110] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, It is characterized in that include: substrate substrate; A first routing line and a second routing line, wherein the first routing line and the second routing line are arranged on the same side of the substrate; the opposite ends of the first routing line are electrically connected to the opposite ends of the second routing line; the resistance of the first routing line is positively correlated with the temperature of the first routing line, and the resistance of the second routing line is negatively correlated with the temperature of the second routing line.

2. The display panel according to claim 1, It is characterized in that The first routing line and the second routing line are stacked; one of the first routing line and the second routing line is arranged on one side of the base substrate, and the orthographic projection of the first routing line on the base substrate and the orthographic projection of the second routing line on the base substrate at least partially overlap.

3. The display panel according to claim 1, It is characterized in that The first routing line and the second routing line are arranged on the same layer; the orthographic projection of the first routing line on the base substrate does not overlap with the orthographic projection of the second routing line on the base substrate.

4. The display panel according to claim 2 or 3, It is characterized in that At least two of at least one of the first routing lines and the second routing lines are provided, and the first routing lines and the second routing lines are arranged at intervals.

5. The display panel according to claim 1, It is characterized in that The first wiring and the second wiring are both provided with a first terminal and a second terminal at opposite ends; the first terminal of the first wiring is electrically connected to the first terminal of the second wiring, and the second terminal of the first wiring is electrically connected to the second terminal of the second wiring.

6. The display panel according to claim 5, It is characterized in that Also includes: a driver chip, wherein the driver chip is electrically connected to a first terminal of the first wiring through a first pin, and is electrically connected to a second terminal of the first wiring through a second pin; or The driving chip is electrically connected to the first terminal of the second wiring through a first pin, and is electrically connected to the second terminal of the second wiring through a second pin.

7. The display panel according to claim 1, It is characterized in that The first trace is formed of a first metal, and the second trace is formed of an oxide of a second metal, wherein the first metal is different from the second metal.

8. The display panel according to claim 7, It is characterized in that The first metal includes at least one of aluminum, copper, molybdenum, titanium, chromium, silver, neodymium, platinum, tungsten and gold; the second metal includes at least one of copper, cobalt, nickel, titanium and zinc.

9. A compensation method for a display panel, It is characterized in that include: Determine a target wiring in the display panel, and determine a type of the target wiring according to the acquired resistance of the target wiring and the temperature of the target wiring; In response to the target routing being a first routing, determining a compensation current of the first routing according to a compensation voltage of the first routing and a resistance value of the first routing determined by a temperature of the first routing, and regulating a current signal of the first routing based on the compensation current; In response to the target routing being the second routing, a compensation current is determined in a preset current compensation relationship according to the temperature of the second routing and the actual current of the second routing obtained, and the current signal of the second routing is regulated based on the compensation current.

10. The display panel compensation method according to claim 9, It is characterized in that The determining the type of the target wiring according to the acquired resistance of the target wiring and the temperature of the target wiring includes: Determine the type of the target wiring according to the acquired relationship between the resistance of the target wiring and the temperature of the target wiring; In response to the resistance of the target routing being positively correlated with the temperature of the target routing, the target routing is a first routing; In response to the resistance of the target routing being negatively correlated with the temperature of the target routing, the target routing is the second routing.

11. A display device, It is characterized in that Comprising a display panel as claimed in any one of claims 1 to 8.

Images