Display panel and display device

Abstract

The present disclosure relates to the technical field of display, and discloses a display panel and a display device. The pixel circuit of the display panel comprises a driving transistor, a first light-emitting control transistor and a second light-emitting control transistor. The light-emitting efficiency of the light-emitting element electrically connected to the first type of pixel circuit is less than the light-emitting efficiency of the light-emitting element electrically connected to the second type of pixel circuit. The first light-emitting control signal line is electrically connected to the control end of the second light-emitting control transistor and the first light-emitting control transistor of the first type of pixel circuit, and the control end of the first light-emitting control transistor of the second type of pixel circuit. The second light-emitting control signal line is electrically connected to the control end of the second light-emitting control transistor of the second type of pixel circuit. The effective pulse maintaining time length provided by the first light-emitting control signal line is greater than the effective pulse maintaining time length provided by the second light-emitting control signal line. The display device comprises the above display panel. The present disclosure can improve display color difference, improve display brightness uniformity, and simplify layout design.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] Light-emitting diode (LED) displays are a new generation of display technology, with advantages such as small size, light weight, high brightness, long life, low power consumption, fast response time, and strong controllability. For example, micro LED displays have gradually attracted widespread attention because they can shrink the length of LEDs to 1% of the original (e.g., to less than 100 micrometers) and have advantages such as higher luminous brightness, luminous efficiency, and lower operating power consumption compared to organic light-emitting diode (OLED) displays.

[0003] However, micro LEDs and other light-emitting diodes have different luminous colors, resulting in varying luminous efficiency and white balance brightness requirements. However, to simplify panel design, current technologies generally use the same driving mode for different colored LEDs. This easily leads to uneven brightness among different colored LEDs, resulting in color differences and unsatisfactory display effects. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a display panel and a display device to solve the issues of uneven brightness and significant color difference in existing display devices, which affect display performance.

[0005] This disclosure provides a display panel including multiple pixel circuits, each pixel circuit being electrically connected to a light-emitting element; each pixel circuit includes a driving transistor, a first light-emitting control transistor, and a second light-emitting control transistor, the first light-emitting control transistor being electrically connected between a first power signal terminal and a first electrode of the driving transistor, and the second light-emitting control transistor being electrically connected between a second electrode of the driving transistor and the anode of the light-emitting element; The multiple pixel circuits include a first type of pixel circuit and a second type of pixel circuit. The luminous efficiency of the light-emitting element electrically connected to the first type of pixel circuit is less than that of the light-emitting element electrically connected to the second type of pixel circuit. The display panel also includes multiple first light-emitting control signal lines and multiple second light-emitting control signal lines; among which, The first light emission control signal line is electrically connected to the control terminal of the second light emission control transistor of the first type of pixel circuit, the control terminal of the first light emission control transistor of the first type of pixel circuit, and the control terminal of the first light emission control transistor of the second type of pixel circuit, respectively. The second light-emitting control signal line is electrically connected to the control terminal of the second light-emitting control transistor of the second type of pixel circuit; Within the same display frame, the duration of the effective pulse provided by the first light emission control signal line is longer than the duration of the effective pulse provided by the second light emission control signal line.

[0006] Optionally, the first type of pixel circuit is electrically connected to the red light-emitting element, and the second type of pixel circuit is electrically connected to the green light-emitting element and / or the blue light-emitting element.

[0007] Optionally, the first type of pixel circuit is electrically connected to the red light-emitting element, and the second type of pixel circuit includes a first sub-pixel circuit and a second sub-pixel circuit, wherein the first sub-pixel circuit is electrically connected to the green light-emitting element and the second sub-pixel circuit is electrically connected to the blue light-emitting element. The second light emission control signal line includes a first sub-line and a second sub-line; The first sub-line is electrically connected to the control terminal of the second light-emitting control transistor of the first sub-pixel circuit; The second sub-line is electrically connected to the control terminal of the second light-emitting control transistor of the second sub-pixel circuit; Within the same display frame, the effective pulse duration provided by the first sub-line is greater than the effective pulse duration provided by the second sub-line.

[0008] Optionally, the pixel circuit may also include a first reset transistor, a second reset transistor, a data write transistor, and a threshold compensation transistor; The first reset transistor is electrically connected to the control terminal of the drive transistor; Data is written to the transistor, which is electrically connected to the first terminal of the driving transistor. The second reset transistor is electrically connected to the anode of the light-emitting element; The threshold compensation transistor is electrically connected between the control terminal and the second terminal of the driving transistor.

[0009] Optionally, the display panel includes a non-display area, the non-display area includes a light-emitting control scanning circuit, and the light-emitting control scanning circuit includes a first light-emitting control scanning circuit and a second light-emitting control scanning circuit. The first light emission control scanning circuit includes multiple cascaded first light emission shift registers, and the output terminal of the first light emission shift register is electrically connected to the first light emission control signal line; The second light emission control scanning circuit includes multiple cascaded second light emission shift registers, and the output of the second light emission shift registers is electrically connected to the second light emission control signal line.

[0010] Further optionally, the plurality of cascaded first light-emitting shift registers include a first start shift register, the first start shift register being electrically connected to a first start signal; Multiple cascaded second light-emitting shift registers include a second start shift register, which is electrically connected to a second start signal; wherein, Within the same display frame, the effective pulse duration of the first start signal is longer than the effective pulse duration of the second start signal.

[0011] Optionally, the display panel includes a non-display area, which includes a first bonding pad and a second bonding pad. The first bonding pad is electrically connected to a first light-emitting control signal line, and the second bonding pad is electrically connected to a second light-emitting control signal line. Within the same display frame, the effective pulse duration provided by the first bonding pad to the first light-emitting control signal line is greater than the effective pulse duration provided by the second bonding pad to the second light-emitting control signal line.

[0012] Based on the same inventive concept, this disclosure also provides a display device, which includes the above-described display panel.

[0013] Optionally, the display device also includes a temperature sensor electrically connected to the display panel, the temperature sensor being configured to monitor the operating temperature of the display panel.

[0014] Alternatively, the temperature sensor can be integrated into the display panel.

[0015] Alternatively, the temperature sensor may be located outside the display panel.

[0016] Alternatively, the orthographic projection of the temperature sensor onto the plane of the display panel is located in the middle area of ​​the display panel.

[0017] Alternatively, the number of temperature sensors may be multiple, with the orthographic projections of the multiple temperature sensors onto the plane of the display panel located in the central and corner areas of the display panel, respectively.

[0018] Alternatively, the effective pulse duration provided by the first light-emitting control signal line is proportional to the operating temperature of the display panel monitored by the temperature sensor.

[0019] Further optionally, the operating temperature of the display panel monitored by the temperature sensor is a first temperature value, and the effective pulse duration provided by the first light-emitting control signal line is A; The operating temperature of the display panel monitored by the temperature sensor is the second temperature value. If the second temperature value is greater than the first temperature value, then the effective pulse duration provided by the first light-emitting control signal line is B, and B is greater than A.

[0020] Alternatively, the display device may further include a driver chip electrically connected to the display panel.

[0021] Further optionally, the display panel includes a non-display area, which includes a first bonding pad and a second bonding pad, the first bonding pad being electrically connected to a first light emission control signal line, and the second bonding pad being electrically connected to a second light emission control signal line; The driver chip includes a first pin and a second pin. The first pin is electrically connected to a first bonding pad, and the second pin is electrically connected to a second bonding pad. The driver chip is configured such that, within the same display frame, the effective pulse duration provided by the first pin to the first light-emitting control signal line is longer than the effective pulse duration provided by the second pin to the second light-emitting control signal line.

[0022] Alternatively, the temperature sensor is electrically connected to the driver chip; The driver chip is configured to receive the operating temperature of the display panel monitored by the temperature sensor and adjust the duration of the effective pulse transmitted from the first pin to the first light-emitting control signal line.

[0023] The technical solution provided in this disclosure has the following advantages compared with the prior art: The display panel provided in this disclosure includes a pixel circuit comprising at least a driving transistor, a first light-emitting control transistor, and a second light-emitting control transistor. The driving transistor, the first light-emitting control transistor, the second light-emitting control transistor, and the light-emitting element are electrically connected between a first power signal terminal and a second power signal terminal. When a conductive path is formed between the first power signal terminal and the second power signal terminal, a driving current is generated, which controls the light-emitting element to emit light. This disclosure provides multiple pixel circuits, including a first type of pixel circuit and a second type of pixel circuit. The luminous efficiency of the light-emitting element electrically connected to the first type of pixel circuit is less than that of the light-emitting element electrically connected to the second type of pixel circuit. The display panel also includes multiple first light-emitting control signal lines and multiple second light-emitting control signal lines. The first light-emitting control signal lines are electrically connected to the control terminals of the second light-emitting control transistors in the first type of pixel circuit, while the second light-emitting control signal lines are electrically connected to the control terminals of the second light-emitting control transistors in the second type of pixel circuit. Within the same display frame, the effective pulse duration provided by the first light-emitting control signal line is greater than the effective pulse duration provided by the second light-emitting control signal line, thereby controlling the light emission of light-emitting elements with different luminous efficiencies. The conduction durations of the second light-emitting control transistors electrically connected to the optical elements differ, thereby controlling the light-emitting durations of light-emitting elements with different luminous efficiencies to differ. For light-emitting elements electrically connected to the first type of pixel circuit with lower luminous efficiency, the effective pulse duration provided by the first light-emitting control signal line is longer, resulting in a longer light-emitting duration for the low-efficiency light-emitting element. Conversely, for light-emitting elements electrically connected to the second type of pixel circuit with higher luminous efficiency, the effective pulse duration provided by the second light-emitting control signal line is shorter, resulting in a shorter light-emitting duration for the high-efficiency light-emitting element. This allows light-emitting elements of different colors and efficiencies to maintain a relatively consistent brightness under the same grayscale voltage, which helps improve color difference and enhances the uniformity of display brightness on the display panel. Furthermore, this disclosure provides that the first light-emitting control signal line is also electrically connected to the control terminal of the first light-emitting control transistor of the first type of pixel circuit and the control terminal of the first light-emitting control transistor of the second type of pixel circuit. That is, in the pixel circuits where light-emitting elements of different light-emitting colors are electrically connected, at least for a row of pixel circuits, the first light-emitting control transistors of both the first type of pixel circuit and the second type of pixel circuit share a first light-emitting control signal line. This makes the circuit layout of the pixel circuits in the display panel more convenient and helps to save layout space. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a planar structure of a display panel provided in an embodiment of this disclosure; Figure 2 yes Figure 1 A schematic diagram of an electrical connection structure between the pixel circuit and the light-emitting element; Figure 3 This is a schematic diagram of an electrical connection structure of a first type of pixel circuit and a light-emitting element, and a second type of pixel circuit and a light-emitting element provided in the embodiments of this disclosure; Figure 4 yes Figure 3 The first and second light-emitting control signal lines provide a signal timing diagram within the same display frame; Figure 5 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure; Figure 6 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure; Figure 7 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure; Figure 8 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure; Figure 9 yes Figure 8 Another signal timing diagram provided by the first and second light emission control signal lines within the same display frame; Figure 10 yes Figure 1 A schematic diagram of another electrical connection structure between the middle pixel circuit and the light-emitting element; Figure 11 This is a schematic diagram of another planar structure of the display panel provided in an embodiment of this disclosure; Figure 12 yes Figure 11 A timing diagram of the first and second start signals within the same display frame; Figure 13 This is a schematic diagram of another planar structure of the display panel provided in an embodiment of this disclosure; Figure 14 This is a schematic diagram of a planar structure of a display device provided in an embodiment of the present disclosure; Figure 15 This is a schematic diagram of an electrical connection structure of a display device provided in an embodiment of the present disclosure; Figure 16 yes Figure 3 A timing diagram of the first and second light-emitting control signal lines under different operating temperatures of the display panel; Figure 17 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure; Figure 18 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure; Figure 19 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure; Figure 20 This is a schematic diagram of another electrical connection structure of the display device provided in the embodiments of this disclosure. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0029] Please refer to the reference. Figures 1-4 , Figure 1 This is a schematic diagram of a planar structure of a display panel provided in an embodiment of this disclosure. Figure 2 yes Figure 1 A schematic diagram of an electrical connection structure between the mid-pixel circuit and the light-emitting element. Figure 3 This is a schematic diagram of an electrical connection structure for a first type of pixel circuit and a light-emitting element, and a second type of pixel circuit and a light-emitting element provided in the embodiments of this disclosure. Figure 4 yes Figure 3The first light-emitting control signal line and the second light-emitting control signal line provide a signal timing diagram within the same display frame; the display panel 000 provided in this embodiment includes a plurality of pixel circuits 10, and the pixel circuits 10 are electrically connected to the light-emitting element 20; the pixel circuit 10 includes a driving transistor 101, a first light-emitting control transistor 102 and a second light-emitting control transistor 103, the first light-emitting control transistor 102 is electrically connected between the first power supply signal terminal PVDD and the first electrode of the driving transistor 101, and the second light-emitting control transistor 103 is electrically connected between the second electrode of the driving transistor 101 and the anode of the light-emitting element 20; The multiple pixel circuits 10 include a first type of pixel circuit 10A and a second type of pixel circuit 10B. The luminous efficiency of the light-emitting element 20 electrically connected to the first type of pixel circuit 10A is less than the luminous efficiency of the light-emitting element 20 electrically connected to the second type of pixel circuit 10B. The display panel 000 also includes multiple first light-emitting control signal lines L1-EM and multiple second light-emitting control signal lines L2-EM; wherein, The first light-emitting control signal line L1-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the first type pixel circuit 10A, the control terminal of the first light-emitting control transistor 102 of the first type pixel circuit 10A, and the control terminal of the first light-emitting control transistor 102 of the second type pixel circuit 10B, respectively. The second light-emitting control signal line L2-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the second type pixel circuit 10B. It can be understood that the control terminal of the transistor in this embodiment can be understood as the gate of the transistor, and the signal line electrically connected to the control terminal of the transistor is used to provide a control signal to control the transistor to turn on or off. Within the same display frame, the effective pulse duration t1 provided by the first light emission control signal line L1-EM is greater than the effective pulse duration t2 provided by the second light emission control signal line L2-EM.

[0030] Specifically, the display panel 000 provided in this embodiment includes multiple pixel circuits 10, each electrically connected to a light-emitting element 20. The light-emitting element 20 can be a light-emitting diode (LED), such as a mini light-emitting diode (mini LED) or a micro light-emitting diode (micro LED), etc., and can be designed according to actual conditions in specific implementations. In this embodiment, the pixel circuits 10 are electrically connected to the light-emitting elements 20. During the process of driving the display panel 000 to emit light and display, the brightness of the light-emitting elements 20 electrically connected to the pixel circuits 10 can be controlled by adjusting the driving current provided to the pixel circuits 10, thereby realizing the image display function of the display panel 000.

[0031] It is understood that in this embodiment Figure 1 The multiple light-emitting elements 20 included in the display panel 000 are illustrated using an array arrangement as an example. In actual implementation, the arrangement of the multiple light-emitting elements 20 in the display panel 000 can be selected and set according to actual needs. This embodiment Figure 1 The pixel circuit 10 is only represented by a block diagram. In a specific implementation, the pixel circuit 10 can be a structure that includes multiple modules electrically connected. For example, the pixel circuit 10 can be an electrical connection structure that includes multiple thin-film transistors and capacitors. The thin-film transistors and capacitors can be made using the film layer structure of the display panel 000. This embodiment will not be described in detail here. Please refer to the following description for a better understanding.

[0032] like Figure 2 As shown, the pixel circuit 10 provided in this embodiment includes at least a driving transistor 101, a first light-emitting control transistor 102, and a second light-emitting control transistor 103. The driving transistor 101, the first light-emitting control transistor 102, the second light-emitting control transistor 103, and the light-emitting element 20 can be electrically connected between a first power signal terminal PVDD and a second power signal terminal PVEE. When a conductive path is formed between the first power signal terminal PVDD and the second power signal terminal PVEE, a driving current is generated, which controls the light-emitting element 20 to emit light. Specifically, the first light-emitting control transistor 102 is electrically connected between the first power signal terminal PVDD and the first terminal (e.g., the source of the driving transistor 101), the second light-emitting control transistor 103 is electrically connected between the second terminal (e.g., the drain of the driving transistor 101) and the anode of the light-emitting element 20, and the cathode of the light-emitting element 20 is electrically connected to the second power signal terminal PVEE.

[0033] It is understood that in this embodiment Figure 1 and Figure 2 The diagram only illustrates the structure of the display panel. In a real implementation, the display panel may also include a driving circuit and other structures besides the pixel circuit 10 and the light-emitting element 20, such as various signal lines. Figure 2 The diagram only illustrates the electrical connection structure between the pixel circuit 10 and the light-emitting element 20. In a specific implementation, the pixel circuit 10 may also include other functional modules besides the driving transistor 101, the first light-emitting control transistor 102, and the second light-emitting control transistor 103. In a specific implementation, the design can be carried out according to actual needs, and this embodiment does not limit it.

[0034] To achieve a color display effect, the display panel 000 includes multiple light-emitting elements 20 of various colors, such as red, green, and blue. Because the light-emitting elements 20 emit different colors, their luminous efficiency and white balance brightness requirements differ. In the prior art, to simplify circuit design, light-emitting elements of different colors generally still use the same driving mode, meaning the emission duration of different colors is basically the same. However, because the luminous efficiency of different colors differs, the achieved brightness is different. For example, under the same emission duration, a light-emitting element with low luminous efficiency will achieve a dimmer brightness, creating a brightness difference with a light-emitting element 20 of another color with high luminous efficiency. Since white balance brightness requires the coordination of the three primary colors, if the brightness of one of the three primary colors is too dim, the brightness balance requirement cannot be met, easily causing uneven brightness and resulting in uneven brightness and color difference in the display. However, if the light emission duration of light-emitting elements of different colors is controlled to be different, that is, if light-emitting elements of different colors are controlled separately, at least three sets of light emission scanning drive circuits are required to control the light emission of three different light-emitting elements. This can easily result in a large layout area occupied by the light emission scanning drive circuit in the display panel and a lot of wiring.

[0035] To address the aforementioned issues, this embodiment provides multiple pixel circuits 10, including a first type of pixel circuit 10A and a second type of pixel circuit 10B. The luminous efficiency of the light-emitting element 20 electrically connected to the first type of pixel circuit 10A is lower than that of the light-emitting element 20 electrically connected to the second type of pixel circuit 10B. Therefore, the multiple pixel circuits 10 included in the display panel 000 are at least divided into a first type of pixel circuit 10A and a second type of pixel circuit 10B. The first type of pixel circuit 10A refers to the pixel circuit 10 electrically connected to the light-emitting element 20 with lower luminous efficiency, and the second type of pixel circuit 10B refers to the pixel circuit 10 electrically connected to the light-emitting element 20 with higher luminous efficiency. If the luminous efficiency of the red light-emitting element is less than that of the green light-emitting element, and the luminous efficiency of the green light-emitting element is less than that of the blue light-emitting element, then assuming that the light-emitting element 20 electrically connected to the first type of pixel circuit 10A is a red light-emitting element, then the light-emitting element 20 electrically connected to the second type of pixel circuit 10B is either a green light-emitting element or a blue light-emitting element; or assuming that the light-emitting element 20 electrically connected to the first type of pixel circuit 10A is a green light-emitting element, then the light-emitting element 20 electrically connected to the second type of pixel circuit 10B is a blue light-emitting element, provided that the luminous efficiency of the light-emitting element 20 electrically connected to the first type of pixel circuit 10A is less than that of the light-emitting element 20 electrically connected to the second type of pixel circuit 10B.

[0036] like Figure 3 As shown, this embodiment further includes a display panel 000 comprising multiple first light-emitting control signal lines L1-EM and multiple second light-emitting control signal lines L2-EM; wherein, the first light-emitting control signal lines L1-EM are electrically connected to the control terminals of the second light-emitting control transistors 103 and 102 of the first pixel circuit 10A, and the control terminals of the first light-emitting control transistors 102 of the second pixel circuit 10B, respectively, while the second light-emitting control signal lines L2-EM are electrically connected to the control terminal of the second light-emitting control transistors 103 of the second pixel circuit 10B. It is understood that this embodiment... Figure 3 Only one first-type pixel circuit 10A and one second-type pixel circuit 10B are illustrated. In actual implementation, a row of pixel circuits in the display panel 000 may include multiple first-type pixel circuits 10A and multiple second-type pixel circuits 10B. The electrical connection method of the multiple first-type pixel circuits 10A and multiple second-type pixel circuits 10B in the same row of pixel circuits can be referred to Figure 3 As shown. This embodiment Figure 3Only one first light-emitting control signal line L1-EM and one second light-emitting control signal line L2-EM are shown. In actual implementation, the display panel 000 may include multiple first light-emitting control signal lines L1-EM and multiple second light-emitting control signal lines L2-EM. For example, the control terminals of the second light-emitting control transistors 103 of all first-type pixel circuits 10A, the control terminals of the first light-emitting control transistors 102 of all first-type pixel circuits 10A, and the control terminals of the first light-emitting control transistors 102 of all second-type pixel circuits 10B in a row of pixel circuits can be electrically connected to one first light-emitting control signal line L1-EM, and the control terminals of the second light-emitting control transistors 103 of all second-type pixel circuits 10B in a row of pixel circuits can be electrically connected to one second light-emitting control signal line L2-EM.

[0037] In this embodiment, the first light-emitting control signal line L1-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the first type of pixel circuit 10A, and the second light-emitting control signal line L2-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the second type of pixel circuit 10B. Within the same display frame, the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM is greater than the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM. Therefore, for light-emitting elements 20 with different luminous efficiencies, the conduction duration of the second light-emitting control transistor 103 electrically connected to the light-emitting elements 20 with different luminous efficiencies is controlled to be different, thereby controlling the light emission time of the light-emitting elements 20 with different luminous efficiencies. The light-emitting element 20 electrically connected to the first type of pixel circuit 10A has a lower luminous efficiency, so the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM is longer, and the light-emitting duration of the light-emitting element 20 with lower luminous efficiency is longer. The light-emitting element 20 electrically connected to the second type of pixel circuit 10B has a higher luminous efficiency, so the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM is shorter, and the light-emitting duration of the light-emitting element 20 with higher luminous efficiency is shorter. This allows light-emitting elements with different luminous colors and different luminous efficiencies to maintain a basically consistent luminous brightness under the same grayscale voltage, which is beneficial for improving color difference and enhancing the uniformity of display brightness of the display panel 000.

[0038] Furthermore, in this embodiment, the first light-emitting control signal line L1-EM is also electrically connected to the control terminals of the first light-emitting control transistor 102 of the first type of pixel circuit 10A and the first light-emitting control transistor 102 of the second type of pixel circuit 10B. That is, the first light-emitting control signal line L1-EM is also electrically connected to the control terminals of the first light-emitting control transistors 102 of the first type of pixel circuit 10A and the second type of pixel circuit 10B in the pixel circuit 10 (e.g., a row of pixel circuits). In at least one row of pixel circuits 10 where light-emitting elements 20 of different colors are electrically connected, the first light-emitting control transistors 102 share a single first light-emitting control signal line L1-EM. Since the thin-film transistors with the same function are arranged in close proximity in the pixel circuit 10 layout design of the display panel 000, it can be understood that for a row of pixel circuits, the first light-emitting control transistor 102 of the first type of pixel circuit 10A and the first light-emitting control transistor 102 of the second type of pixel circuit 10B may be arranged in the same horizontal space in the display panel 000. For a column of pixel circuits, the first light-emitting control transistor 102 of the first type of pixel circuit 10A and the first light-emitting control transistor 102 of the second type of pixel circuit 10B may be arranged in the same vertical space in the display panel 000. Therefore, in the pixel circuit 10 with light-emitting elements 20 of different light-emitting colors electrically connected in this embodiment, at least for a row of pixel circuits 10, the first light-emitting control transistor 102 of both the first type of pixel circuit 10A and the second type of pixel circuit 10B share a first light-emitting control signal line L1-EM. This makes the circuit layout of the pixel circuits in the display panel 000 more convenient and helps to save layout space.

[0039] In this embodiment, the first light emission control signal line L1-EM is also electrically connected to the control terminal of the second light emission control transistor 103 in the first type of pixel circuit 10A, that is, to control the light emission duration of the light emission element 20 with low light emission efficiency, while the second light emission control signal line L2-EM only needs to be electrically connected to the control terminal of the second light emission control transistor 103 in the second type of pixel circuit 10B to control the light emission duration of the light emission element 20 with high light emission efficiency. The effective pulse signal provided by the first light-emitting control signal line L1-EM controls the light-emitting element 20 with low luminous efficiency to have a longer light-emitting duration, while the effective pulse signal provided by the second light-emitting control signal line L2-EM controls the light-emitting element 20 with high luminous efficiency to have a shorter light-emitting duration. This allows for separate control of the light-emitting duration of light-emitting elements 20 with different luminous efficiencies, avoiding color differences caused by the low brightness of the low-efficiency light-emitting element 20. By setting the effective pulse duration provided by the first light-emitting control signal line L1-EM to be increased separately within the same display frame, the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM is made greater than the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM. This helps to improve the brightness of the low-efficiency light-emitting element 20, ensuring that the brightness of light-emitting elements 20 with different luminous colors remains basically consistent under the same grayscale voltage, thus improving the display uniformity of the display panel.

[0040] It is understood that the effective pulse provided by the first light-emitting control signal line L1-EM in this embodiment can be understood as an enable signal that enables the second light-emitting control transistor 103 of the first type pixel circuit 10A, the first light-emitting control transistor 102 of the first type pixel circuit 10A, and the first light-emitting control transistor 102 of the second type pixel circuit 10B to conduct. The pulse signal provided by the first light-emitting control signal line L1-EM can be a pulse signal that alternates between high and low levels. If the second light-emitting control transistor 103 of the first type pixel circuit 10A, the first light-emitting control transistor 102 of the first type pixel circuit 10A, and the first light-emitting control transistor 102 of the second type pixel circuit 10B are P-type transistors, then the effective pulse signal provided by the first light-emitting control signal line L1-EM is a low-level signal; if the second light-emitting control transistor 103 of the first type pixel circuit 10A, the first light-emitting control transistor 102 of the first type pixel circuit 10A, and the first light-emitting control transistor 102 of the second type pixel circuit 10B are N-type transistors, then the effective pulse signal provided by the first light-emitting control signal line L1-EM is a high-level signal. Similarly, the effective pulse provided by the second light-emitting control signal line L2-EM can be understood as an enable signal that turns on the second light-emitting control transistor 103 of the second type pixel circuit 10B. The pulse signal provided by the second light-emitting control signal line L2-EM can be an alternating high-level and low-level pulse signal. If the second light-emitting control transistor 103 of the second type pixel circuit 10B is a P-type transistor, then the effective pulse signal provided by the second light-emitting control signal line L2-EM is a low-level signal; if the second light-emitting control transistor 103 of the second type pixel circuit 10B is an N-type transistor, then the effective pulse signal provided by the second light-emitting control signal line L2-EM is a high-level signal. This embodiment... Figure 4 The example illustrates how the second light-emitting control transistor 103 of the first type pixel circuit 10A, the first light-emitting control transistor 102 of the first type pixel circuit 10A, the first light-emitting control transistor 102 of the second type pixel circuit 10B, and the second light-emitting control transistor 103 of the second type pixel circuit 10B are all P-type transistors, meaning that the effective pulse signal provided by the first light-emitting control signal line L1-EM and the effective pulse signal provided by the second light-emitting control signal line L2-EM are both low-level signals.

[0041] It should be noted that the display frame in this embodiment can be understood as including a data writing frame and a light-holding frame after the data writing frame is completed. Assuming that the refresh rate of the display panel 000 is a relatively low 1Hz, the refresh period corresponding to this 1Hz can be divided into 60 parts, for example. The first part can be used as the working period of the data writing frame, and the remaining 59 parts can be used as the working period of the light-holding frame. The effective pulse maintenance duration (i.e., light-emitting duration) provided by the light-emitting control signal line included in the display frame in this embodiment and subsequent embodiments is based on the light-emitting duration of the light-emitting phase of the data writing frame. Since the light-emitting elements 20 are all in a light-holding state, the light-holding frame will not be described in detail.

[0042] Optional, such as Figures 1-4 , Figures 5-7 As shown, Figure 5 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure. Figure 6 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure. Figure 7 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure. In this embodiment, the first type of pixel circuit 10A is electrically connected to the red light-emitting element 20-R, and the second type of pixel circuit 10B is electrically connected to the green light-emitting element 20-G and / or the blue light-emitting element 20-B.

[0043] This embodiment explains that the light-emitting element 20 included in the display panel 000 can be a miniature light-emitting diode (LED). For different colored LEDs, the red LED has the lowest luminous efficiency, while the luminous efficiency of the green and blue LEDs is similar, but the green LED's luminous efficiency is slightly lower than that of the blue LED. Therefore, in this embodiment, as... Figure 5 As shown, the first type of pixel circuit 10A electrically connects to a low-efficiency light-emitting element 20, which is a red light-emitting element 20-R; the second type of pixel circuit 10B electrically connects to a high-efficiency light-emitting element 20, which is a green light-emitting element 20-G; or as... Figure 6 As shown, the second type of pixel circuit 10B electrically connects to a high-efficiency light-emitting element 20, which is a blue light-emitting element 20-B; or as... Figure 7As shown, the second type of pixel circuit 10B is electrically connected to green light-emitting elements 20-G and blue light-emitting elements 20-B, which have higher luminous efficiency. This makes the pixel circuit 10 connected to green light-emitting elements 20-G and blue light-emitting elements 20-B with similar luminous efficiency both defined as the second type of pixel circuit 10B. Then, the second light-emitting control transistor 103 connected to green light-emitting element 20-G and the second light-emitting control transistor 103 connected to blue light-emitting element 20-B can share a second light-emitting control signal line L2-EM, which is beneficial to further simplify the layout of the pixel circuit, reduce the number of signal lines, and balance the display effect and layout design efficiency.

[0044] In some alternative embodiments, please refer to the references. Figure 1 , Figure 2 , Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of another electrical connection structure between the first type of pixel circuit and the light-emitting element, and the second type of pixel circuit and the light-emitting element provided in the embodiments of this disclosure. Figure 9 yes Figure 8 The first light emission control signal line and the second light emission control signal line provide another signal timing diagram within the same display frame; in this embodiment, the first type of pixel circuit 10A is electrically connected to the red light emission element 20-R, and the second type of pixel circuit 10B includes a first sub-pixel circuit 10B1 and a second sub-pixel circuit 10B2. The first sub-pixel circuit 10B1 is electrically connected to the green light emission element 20-G, and the second sub-pixel circuit 10B2 is electrically connected to the blue light emission element 20-B. The second light emission control signal line L2-EM includes a first sub-line L21-EM and a second sub-line L22-EM; The first sub-line L21-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the first sub-pixel circuit 10B1; The second sub-line L22-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the second sub-pixel circuit 10B2; Within the same display frame, the effective pulse duration t21 provided by the first sub-line L21-EM is greater than the effective pulse duration t22 provided by the second sub-line L22-EM.

[0045] This embodiment explains that the light-emitting element 20 included in the display panel 000 can be a miniature light-emitting diode. For miniature light-emitting diodes of different colors, the luminous efficiency of the red light-emitting element is the lowest, and the luminous efficiency of the green light-emitting element is slightly lower than that of the blue light-emitting element. That is, the luminous efficiency of the red light-emitting element is lower than that of the green light-emitting element, and the luminous efficiency of the green light-emitting element is lower than that of the blue light-emitting element. Therefore, in this embodiment, the first type of pixel circuit 10A is electrically connected to a red light-emitting element 20-R with lower luminous efficiency. The second type of pixel circuit 10B is further configured to include a first sub-pixel circuit 10B1 and a second sub-pixel circuit 10B2. The first sub-pixel circuit 10B1 is electrically connected to a green light-emitting element 20-G with slightly higher luminous efficiency, and the second sub-pixel circuit 10B2 is electrically connected to a blue light-emitting element 20-B with the highest luminous efficiency. Furthermore, the second light-emitting control signal line L2-EM is further configured to include a first sub-line L21-EM and a second sub-line L22-EM. The first sub-line L21-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the first sub-pixel circuit 10B1, and the second sub-line L22-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 of the second sub-pixel circuit 10B2. Not only is the light-emitting duration of the red light-emitting element 20-R controlled separately, but the light-emitting duration of the blue light-emitting element is also controlled separately. The light-emitting duration of element 20-B and green light-emitting element 20-G is also controlled independently. That is, within the same display frame, the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM is greater than the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM. This results in the longest light-emitting duration for the red light-emitting element 20-R, which has the lowest luminous efficiency, and the longest effective pulse duration t21 provided by the first sub-line L21-EM, which is greater than the longest effective pulse duration t22 provided by the second sub-line L22-EM. This minimizes the light-emitting duration for the blue light-emitting element 20-B, which has the highest luminous efficiency. This avoids the problem of insufficient brightness of green light-emitting element 20-G or excessive brightness of blue light-emitting element 20-B. In this way, the luminous brightness of light-emitting elements 20 of different colors is optimized and balanced under the same gray level voltage, improving the accuracy of color display, better improving the display uniformity of the display panel, improving color difference, and improving display quality.

[0046] Optional, such as Figure 1 , Figure 3 , Figure 4 and Figure 10 As shown, Figure 10 yes Figure 1A schematic diagram of another electrical connection structure between the pixel circuit and the light-emitting element. The pixel circuit 10 provided in this embodiment may include an electrical connection structure of 7 transistors and 1 storage capacitor. Specifically, the pixel circuit 10 also includes a first reset transistor 104, a second reset transistor 105, a data writing transistor 106, a threshold compensation transistor 107 and a storage capacitor Cst. The first reset transistor 104 is electrically connected to the control terminal of the drive transistor 101; The data writing transistor 106 is electrically connected to the first electrode of the driving transistor 101; The second reset transistor 105 is electrically connected to the anode of the light-emitting element 20; The threshold compensation transistor 107 is electrically connected between the control terminal and the second terminal of the driving transistor 101; The storage capacitor Cst is electrically connected between the first power signal terminal PVDD and the control terminal of the driving transistor 101.

[0047] This embodiment explains an electrical connection structure that the pixel circuit 10 can be designed with, which may include 7 transistors and 1 storage capacitor. By adding a first reset transistor 104, a second reset transistor 105, a data writing transistor 106, a threshold compensation transistor 107 and a storage capacitor Cst, the data writing, reset and threshold compensation functions of the pixel circuit 10 are realized. The first reset transistor 104, electrically connected to the control terminal of the driving transistor 101, can clear residual signals from the previous frame and avoid signal interference. The second reset transistor 105, electrically connected to the anode of the light-emitting element 20, is used to reset the anode potential of the light-emitting element 20 and improve the stability of light emission. The data writing transistor 106, electrically connected to the first terminal of the driving transistor 101, is used to accurately write externally input data voltage signals into the driving transistor 101 and improve the stability of the driving current. The threshold compensation transistor 107, electrically connected between the control terminal and the second terminal of the driving transistor 101, is used to compensate for the threshold voltage drift of the driving transistor 101, avoid driving current instability caused by threshold drift, and further improve display uniformity. The storage capacitor Cst, electrically connected between the first power signal terminal PVDD and the control terminal of the driving transistor 101, is used to store the driving signal and maintain the stability of the driving current. The structure of the pixel circuit 10 in this embodiment can be adapted to the current driving characteristics of light-emitting elements 20 such as micro LEDs, improving the stability of the pixel circuit 10 and thus accurately driving the light-emitting element 20 to emit light.

[0048] It is understood that in this embodiment Figure 10 The example shown is a pixel circuit 10 comprising 7 transistors and 1 storage capacitor. In actual implementation, the structure of the pixel circuit 10 includes, but is not limited to, this, and may also be other electrical connection structures. Figure 10The example provided uses the seven P-type transistors included in the pixel circuit 10 as an example. In actual implementation, the transistor types included in the pixel circuit 10 can be other. For details, please refer to the circuit structure of the display panel in related technologies.

[0049] In some alternative embodiments, please refer to the references. Figure 4 , Figure 7 and Figure 11 , Figure 11 This is a schematic diagram of another planar structure of the display panel provided in this embodiment (it should be understood that this is to distinguish between the first type of pixel circuit and the second type of pixel circuit). Figure 11 (The block diagrams of the first type of pixel circuit and the second type of pixel circuit are filled with different patterns). In this embodiment, the display panel 000 includes a non-display area NA, the non-display area NA includes a light emission control scanning circuit 30, and the light emission control scanning circuit 30 includes a first light emission control scanning circuit 30A and a second light emission control scanning circuit 30B. The first light emission control scanning circuit 30A includes multiple cascaded first light emission shift registers 30A1, and the output terminal of the first light emission shift register 30A1 is electrically connected to the first light emission control signal line L1-EM. The second light emission control scanning circuit 30B includes multiple cascaded second light emission shift registers 30B1, and the output terminal of the second light emission shift register 30B1 is electrically connected to the second light emission control signal line L2-EM.

[0050] This embodiment explains that two independent light-emitting control scanning circuits 30 can be set in the non-display area NA (such as the bezel area) of the display panel 000, corresponding to the first light-emitting control signal line L1-EM and the second light-emitting control signal line L2-EM, respectively. Specifically, the light-emitting control scanning circuit 30 includes a first light-emitting control scanning circuit 30A and a second light-emitting control scanning circuit 30B. The first light-emitting control scanning circuit 30A includes multiple cascaded first light-emitting shift registers 30A1. The output terminal of the first light-emitting shift register 30A1 is electrically connected to the first light-emitting control signal line L1-EM, which enables the first light-emitting control scanning circuit 30A to provide a first light-emitting control signal to the first light-emitting control signal line L1-EM, so that the effective pulse provided by the first light-emitting control signal line L1-EM is maintained for a longer duration; while the other independent second The light emission control scanning circuit 30B includes multiple cascaded second light emission shift registers 30B1. The output of the second light emission shift registers 30B1 is electrically connected to the second light emission control signal line L2-EM. This allows the second light emission control scanning circuit 30B to provide a second light emission control signal to the second light emission control signal line L2-EM, resulting in a shorter effective pulse duration provided by the second light emission control signal line L2-EM. This allows for precise control of the effective pulse duration of the two types of light emission control signal lines. Within the same display frame, the effective pulse duration t1 provided by the first light emission control signal line L1-EM is greater than the effective pulse duration t2 provided by the second light emission control signal line L2-EM. This enables differentiated driving of the first type of pixel circuit 10A and the second type of pixel circuit 10B, which are electrically connected to the light emission elements 20 with different luminous efficiencies. In this embodiment, the first light emission control scanning circuit 30A includes multiple cascaded first light emission shift registers 30A1, and the second light emission control scanning circuit 30B includes multiple cascaded second light emission shift registers 30B1. The cascaded light emission shift register structure can realize the line-by-line scanning of the pixel circuit by the light emission control signal, thereby adapting to the array layout of the display panel, ensuring the display synchronization of the entire panel as much as possible, avoiding problems such as display misalignment and ghosting, and simplifying the overall design of the light emission control scanning circuit, which is convenient for the large-scale production of the panel.

[0051] Optional, such as Figure 4 , Figure 7 and Figure 11 , Figure 12 As shown, Figure 12 yes Figure 11 In a timing diagram of the first start signal and the second start signal within the same display frame, in the first light emission control scanning circuit 30A, multiple cascaded first light emission shift registers 30A1 include a first start shift register 30A10, and the first start shift register 30A10 is electrically connected to the first start signal STV-1; In the second light emission control scanning circuit 30B, multiple cascaded second light emission shift registers 30B1 include a second start shift register 30B10, which is electrically connected to the second start signal STV-2; wherein... Within the same display frame, the effective pulse duration of the first start signal STV-1 is longer than the effective pulse duration of the second start signal STV-2.

[0052] This embodiment explains that in the first light emission control scanning circuit 30A, the multiple cascaded first light emission shift registers 30A1 include a first start shift register 30A10, which is electrically connected to the first start signal STV-1; in the second light emission control scanning circuit 30B, the multiple cascaded second light emission shift registers 30B1 include a second start shift register 30B10, which is electrically connected to the second start signal STV-2. Within the same display frame, the effective pulse duration of the first start signal STV-1 is greater than that of the second start signal STV-2. Since the pulse duration of the start signal determines the pulse characteristics of the shift register output signal, by controlling the start signal of the light-emitting shift register, the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM can be indirectly controlled to be greater than the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM. This eliminates the need for additional complex pulse control circuits, simplifies the driving process, reduces circuit design costs, and improves the accuracy of pulse duration control.

[0053] It should be noted that this embodiment uses the effective pulses of the first start signal STV-1 and the second start signal STV-2 as low-level signals as an example. In actual implementation, the effective pulses of the first start signal STV-1 and the second start signal STV-2 can also be high-level signals. This embodiment does not limit this.

[0054] In some alternative embodiments, please refer to the references. Figure 4 , Figure 7 and Figure 13 , Figure 13 This is a schematic diagram of another planar structure of the display panel provided in this embodiment (it should be understood that this is to distinguish between the first type of pixel circuit and the second type of pixel circuit). Figure 13(The block diagrams of the first type of pixel circuit and the second type of pixel circuit are filled with different patterns). In this embodiment, the display panel 000 includes a non-display area NA, which includes a first bonding pad BA1 and a second bonding pad BA2. The first bonding pad BA1 is electrically connected to the first light emission control signal line L1-EM, and the second bonding pad BA2 is electrically connected to the second light emission control signal line L2-EM. Within the same display frame, the effective pulse duration provided by the first bonding pad BA1 to the first light emission control signal line L1-EM is greater than the effective pulse duration provided by the second bonding pad BA2 to the second light emission control signal line L2-EM.

[0055] This embodiment explains another method to achieve an effective pulse duration t1 provided by the first light-emitting control signal line L1-EM that is greater than the effective pulse duration t2 provided by the second light-emitting control signal line L2-EM. Specifically, a first bonding pad BA1 and a second bonding pad BA2 are provided in the non-display area NA (as shown in the lower border) of the display panel 000. The first bonding pad BA1 is electrically connected to the first light-emitting control signal line L1-EM. Optionally, the first bonding pad BA1 can be electrically connected to the first light-emitting control signal line L1-EM through a winding of the display panel 000 in the non-display area NA. The second bonding pad BA2 is electrically connected to the second light-emitting control signal line L2-EM. Optionally, the second bonding pad BA2 can be electrically connected to the second light-emitting control signal line L2-EM through a winding of the display panel 000 in the non-display area NA. Within the same display frame, effective pulses are directly provided to the corresponding light-emitting control signal lines through the bonding pads, and the effective pulse duration provided by the first bonding pad BA1 is greater than the effective pulse duration provided by the second bonding pad BA2. This method eliminates the need for a light-emitting control scanning circuit, simplifying the design of the non-display area of ​​the panel, reducing the space required for the scanning circuit, lowering panel manufacturing costs, and enabling a narrower bezel design for the display panel. Simultaneously, the bonding pads are directly bonded to the driver chip or flexible circuit board, making the pulse signal transmission for the first light-emitting control signal line L1-EM and the second light-emitting control signal line L2-EM more direct and stable, reducing signal loss and improving the accuracy of pulse duration. Furthermore, the first bonding pad BA1 provides the drive signal for the first light-emitting control signal line L1-EM, and the second bonding pad BA2 provides the drive signal for the second light-emitting control signal line L2-EM, enabling all light-emitting elements in the display panel 000 to emit light simultaneously, resulting in a more uniform image display perceived by the human eye.

[0056] In some alternative embodiments, please refer to Figure 14 , Figure 14This is a schematic diagram of a planar structure of a display device provided in an embodiment of the present disclosure. The display device 111 provided in this embodiment includes the display panel 000 provided in the above-described embodiment of the present disclosure. Figure 14 This embodiment uses a mobile phone as an example to illustrate the display device 111. It is understood that the display device 111 provided in this disclosure can be any other display device 111 with display functions, such as a computer, television, or automotive display device. It can be widely used in various micro LED-related products (such as mobile phones, automotive displays, wearable devices, etc.), and this disclosure does not impose specific limitations on it. The display device 111 provided in this disclosure has the beneficial effects of the display panel 000 provided in this disclosure. For details, please refer to the specific descriptions of the display panel 000 in the above embodiments; these will not be repeated here.

[0057] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 7 , Figure 14 , Figure 15 , Figure 15 This is a schematic diagram of an electrical connection structure of a display device provided in an embodiment of the present disclosure. In this embodiment, the display device 111 further includes a temperature sensor 40, which is electrically connected to the display panel 000 and is configured to monitor the operating temperature of the display panel 000.

[0058] This embodiment explains that the display device 111 may also include a temperature sensor 40, which is electrically connected to the display panel 000. The temperature sensor 40 can monitor the operating temperature of the display panel 000 in real time. Since temperature affects the luminous efficiency of light-emitting elements 20 of different colors differently, especially the red light-emitting element, whose luminous efficiency is inherently lower than that of the blue and green light-emitting elements, the impact of temperature on the luminous efficiency of the red light-emitting element is much greater than its impact on the luminous efficiency of the blue and green light-emitting elements. Therefore, in high-temperature operating environments, the luminous efficiency of the red light-emitting element will decrease more significantly, resulting in obvious color differences and further exacerbating the problem of uneven brightness. In this embodiment, the temperature sensor 40 can obtain the operating temperature of the display panel 000 in real time, thereby providing accurate data support for adjusting the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM. This ensures that the display panel 000 can maintain good display uniformity under different temperature environments, improving the environmental adaptability and stability of the display device 111.

[0059] It is understood that in this embodiment Figure 15This is merely an illustration of an electrical connection between the display panel 000 and the temperature sensor 40 in a display device, and does not represent the actual installation structure of the temperature sensor 40. In specific implementations, there can be one or more temperature sensors 40. The temperature sensor 40 can be integrated inside the display panel 000 or externally mounted on the display panel 000. For details, please refer to the following embodiments.

[0060] Optional, such as Figures 1-4 , Figure 7 , Figure 14 , Figure 15 As shown, in this embodiment, the operating temperature of the display panel 000 is obtained in real time through the setting of the temperature sensor 40, which provides accurate data support for adjusting the effective pulse maintenance duration t1 provided by the first light emission control signal line L1-EM. Specifically, based on the operating temperature of the display panel 000 obtained in real time by the temperature sensor 40, the effective pulse maintenance duration t1 provided by the first light emission control signal line L1-EM can be adjusted, and the effective pulse maintenance duration provided by the first light emission control signal line L1-EM is directly proportional to the operating temperature of the display panel 000 monitored by the temperature sensor 40.

[0061] This embodiment explains that as the temperature rises, the luminous efficiency of the red light-emitting element, which has a lower luminous efficiency, decreases more significantly. The first light-emitting control signal line L1-EM is electrically connected to the control terminal of the second light-emitting control transistor 103 in the first type of pixel circuit 10A, which controls the light-emitting duration of the low-efficiency light-emitting element 20. By setting the effective pulse duration provided by the first light-emitting control signal line L1-EM to be proportional to the monitored operating temperature of the display panel 000, the brightness loss of the red light-emitting element caused by high temperature can be compensated in real time. That is, when the operating temperature of the display panel 000 increases, the effective pulse duration provided by the first light-emitting control signal line L1-EM can be automatically increased to enhance the light-emitting duration of the red light-emitting element, compensate for the decrease in its luminous efficiency, and ensure that the brightness of the red light-emitting element is consistent with that of the green and blue light-emitting elements. When the operating temperature of the display panel 000 decreases, the effective pulse duration provided by the first light-emitting control signal line L1-EM can be automatically shortened to avoid energy waste and effectively balance display uniformity and energy saving.

[0062] Optional, such as Figures 1-4 , Figure 7 , Figure 11 , Figure 14 , Figure 15 , Figure 16 As shown, Figure 16 yes Figure 3A signal timing diagram of the first and second light emission control signal lines under different operating temperatures of the display panel; in this embodiment, the operating temperature of the display panel 000 monitored by the temperature sensor 40 is the first temperature value, and the effective pulse duration provided by the first light emission control signal line L1-EM is A. The operating temperature of the display panel 000 monitored by the temperature sensor 40 is the second temperature value. If the second temperature value is greater than the first temperature value, then the effective pulse duration provided by the first light-emitting control signal line L1-EM is B, and B is greater than A.

[0063] This embodiment illustrates that temperature has a much greater impact on the luminous efficiency of red light-emitting elements, which have low luminous efficiency, than on blue and green light-emitting elements. Therefore, after the temperature sensor 40 tests the real-time operating temperature of the display panel 000, it can transmit the data to the driver chip or flexible circuit board (as per...) bonded to the display device 111. Figure 11 Taking the structure of the light emission control scanning circuit in the display panel 000 as an example), the driver chip or flexible circuit board sets different signal pulse widths for the first start signal STV-1 and the second start signal STV-2 at different monitored operating temperatures; when the operating temperature of the display panel 000 monitored by the temperature sensor 40 is the first temperature value, the driver chip or flexible circuit board controls the input of the first start signal STV-1 of the first light emission control scanning circuit 30A and the second start signal STV-2 of the second light emission control scanning circuit 30B. At this time, the effective pulse duration provided by the first light emission control signal line L1-EM is A. When the operating temperature of the display panel 000 monitored by the temperature sensor 40 rises to the second temperature value ( When the second temperature value is greater than the first temperature value, the effective pulse duration of the first start signal STV-1 fed into the first light-emitting control scanning circuit 30A by the driver chip or flexible circuit board can be increased. At this time, the effective pulse duration provided by the first light-emitting control signal line L1-EM is adjusted to B, and B is greater than A. Thus, by coordinating the real-time monitoring of the panel operating temperature by the temperature sensor 40 with the output of the driver chip or flexible circuit board, it is possible to ensure that the brightness of the red light-emitting element is always matched with that of the green and blue light-emitting elements as much as possible under different high-temperature environments. This avoids the problem of insufficient red brightness at high temperatures and energy waste at low temperatures, which is conducive to further improving the display stability and energy efficiency of the display device 111.

[0064] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 7 , Figures 14-17 , Figure 17 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure (it is understood that, in order to clearly illustrate the positional relationship between the temperature sensor and the display panel, Figure 17(The temperature sensor is filled with transparency). In this embodiment, the temperature sensor 40 included in the display device 111 can be integrated into the display panel 000. That is, during the manufacturing process of the display panel 000, the temperature sensor 40 can be fabricated through the film layer structure of the display panel 000. Integrating one or more temperature sensors 40 into the structure of the display panel 000 allows the temperature sensor 40 to be closer to the light-emitting area of ​​the display panel 000, enabling more accurate temperature monitoring and more timely capture of temperature changes in the display panel 000. This provides accurate data support for adjusting the effective pulse duration t1 provided by the first light-emitting control signal line L1-EM, further improving the temperature adaptability of the display device. Furthermore, integrating the temperature sensor 40 into the display panel 000 in this embodiment can also reduce the overall size of the display device 111, simplify the overall structure of the display device 111, reduce wiring complexity, and solve the problem of the temperature sensor 40 occupying a large amount of space.

[0065] Optional, please refer to the following: Figures 1-4 , Figure 7 , Figures 14-17 In this embodiment, the temperature sensor 40 included in the display device 111 is disposed outside the display panel 000. That is, after the display panel 000 completes its manufacturing process, one or more temperature sensors 40 can be externally mounted on the structure of the display panel 000. This enables real-time monitoring of the operating temperature of the display panel 000 while reducing the manufacturing complexity of the display panel 000 and improving manufacturing efficiency. Furthermore, disposing of the temperature sensor 40 outside the display panel 000 in this embodiment facilitates the installation, maintenance, and replacement of the temperature sensor 40, reducing the manufacturing difficulty of the display panel 000 (eliminating the need to reserve installation space for the temperature sensor 40 inside the display panel 000). At the same time, the installation position of the temperature sensor 40 can be flexibly selected according to the overall structure of the display device 111, adapting to display devices 111 of different sizes and structures, thus improving the flexibility and applicability of the equipment.

[0066] It is understood that in this embodiment, the temperature sensor 40 is placed outside the display panel 000, which can be externally mounted on the backlight side of the display panel 000. This can avoid affecting the display screen on the light-emitting side of the display panel 000, thereby ensuring that the display screen is not affected by the placement of the temperature sensor 40.

[0067] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 7 , Figures 14-16 , Figure 18 , Figure 18 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure (it is understood that, in order to clearly illustrate the positional relationship between the temperature sensor and the display panel, Figure 18(The temperature sensor is filled with transparency). In this embodiment, the orthographic projection of the temperature sensor 40 onto the plane of the display panel 000 is located in the middle area of ​​the display panel 000. Since the temperature of the edge area of ​​the display panel 000 is easily affected by the external environment and fluctuates greatly when the display panel 000 is in operation, while the temperature in the middle area is more representative, this embodiment places the temperature sensor 40 in the middle area of ​​the display panel 000. That is, regardless of whether the temperature sensor 40 is integrated inside the display panel 000 or externally mounted on the display panel 000, the orthographic projection of the temperature sensor 40 onto the plane of the display panel 000 is located in the middle area of ​​the display panel 000. This allows for more accurate monitoring of the overall operating temperature of the display panel 000, avoiding inaccurate pulse duration adjustment due to local temperature deviations, and ensuring the stability of display uniformity. At the same time, placing the temperature sensor 40 in the middle area of ​​the display panel 000 makes it less susceptible to interference from the wiring and bonding areas at the panel edges, resulting in more stable signal transmission.

[0068] It is understood that, in this embodiment, the central area of ​​the display panel 000 can be understood as the central area of ​​the projection surface of the orthographic projection of the plane on which the display panel 000 is located. For example, if the shape of the projection surface of the orthographic projection of the plane on which the display panel 000 is located is a regular rectangle or square, then the area around the intersection of the diagonals of the rectangle or square can be understood as the central area of ​​the display panel 000; if the shape of the projection surface of the orthographic projection of the plane on which the display panel 000 is located is a regular circle, then the area around the center of the circle can be understood as the central area of ​​the display panel 000; if the shape of the projection surface of the orthographic projection of the plane on which the display panel 000 is located is an irregular shape, then the area of ​​the display panel 000 that is relatively close to the center of the shape can be determined as the central area of ​​the display panel 000 based on the specific shape.

[0069] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 7 , Figures 14-16 , Figure 19 , Figure 19 This is another planar structural schematic diagram of the display device provided in the embodiments of this disclosure (it is understood that, in order to clearly illustrate the positional relationship between the temperature sensor and the display panel, Figure 19 (The temperature sensors are filled with transparency). In this embodiment, there are multiple temperature sensors 40, and the orthographic projections of the multiple temperature sensors 40 onto the plane of the display panel 000 are located in the middle area and the corner areas of the display panel 000, respectively. It can be understood that the corner areas of the display panel 000 in this embodiment can be understood as the border area or the four corners of the display panel 000.

[0070] This embodiment explains that the display device 111 may include multiple temperature sensors 40. By setting multiple temperature sensors 40, comprehensive monitoring of the display panel temperature can be achieved, avoiding the limitations of monitoring with a single temperature sensor 40 and preventing the inability to capture temperature differences between different areas of the display panel 000. When the display device 111 in this embodiment includes multiple temperature sensors 40, temperature sensors 40 can be set in the middle area and corner areas of the display panel 000 respectively, thereby acquiring temperature data of each area of ​​the display panel 000. After receiving the temperature data from each temperature sensor 40, the driver chip or flexible circuit board can adjust the effective pulse duration provided by the first light emission control signal line L1-EM of the corresponding area according to the temperature differences of different areas, further improving display uniformity. Especially for large-size panels, where temperature differences between different areas are more obvious, this embodiment is more suitable for large-size display devices.

[0071] It should be noted that in this embodiment... Figure 19 The example provided illustrates that the display device 111 may include five temperature sensors 40. In actual implementation, the number of temperature sensors can be set according to the specific size of the display panel 000. This embodiment does not limit the number of temperature sensors.

[0072] In some alternative embodiments, please refer to the references. Figures 1-4 , Figure 7 , Figures 13-16 , Figure 20 , Figure 20 This is a schematic diagram of another electrical connection structure of the display device provided in this embodiment (it should be understood that, in order to clearly illustrate the electrical connection between the first pin 501 and the first bonding pad BA1, and the electrical connection between the second pin 502 and the second bonding pad BA2, the diagram is provided). Figure 20 (Transparency filling is applied to the driver chip and bonding pads in the middle). In this embodiment, the display device 111 also includes a driver chip 50, which is electrically connected to the display panel 000. The display panel 000 includes a non-display area NA, which includes at least a first bonding pad BA1 and a second bonding pad BA2. The first bonding pad BA1 is electrically connected to the first light emission control signal line L1-EM, and the second bonding pad BA2 is electrically connected to the second light emission control signal line L2-EM. The driver chip 50 includes at least a first pin 501 and a second pin 502. The first pin 501 is bonded and electrically connected to a first bonding pad BA1, and the second pin 502 is bonded and electrically connected to a second bonding pad BA2. The driver chip 50 is configured such that, within the same display frame, the effective pulse duration t1 provided by the first pin 501 to the first light-emitting control signal line L1-EM is greater than the effective pulse duration t2 provided by the second pin 502 to the second light-emitting control signal line L2-EM.

[0073] This embodiment explains that the display device 111 includes a driver chip 50, which provides drive signals for display to the display panel 000. Optionally, the driver chip 50 is electrically connected to the display panel 000 (e.g., ...). Figure 20 As shown in the figure, the driver chip 50 can be electrically connected to the display panel 000 via a flexible circuit board (not shown in the figure). The driver chip 50 can achieve a bonding electrical connection with the display panel 000 in the non-display area NA of the display panel 000. Specifically, the display panel 000 includes a non-display area NA, which includes multiple bonding pads. The pins of the driver chip 50 can be bonded to the multiple bonding pads included in the non-display area NA, thereby enabling the transmission of the drive signal provided by the driver chip 50 to the signal traces within the display panel 000. In this embodiment, the non-display area NA of the display panel 000 includes at least a first bonding pad BA1 and a second bonding pad BA2. The driver chip 50 includes at least a first pin 501 and a second pin 502. The first pin 501 is bonded and electrically connected to the first bonding pad BA1, and the second pin 502 is bonded and electrically connected to the second bonding pad BA2. The first bonding pad BA1 is electrically connected to the first light emission control signal line L1-EM, and the second bonding pad BA2 is electrically connected to the second light emission control signal line L2-EM. The driver chip 50 can receive temperature data monitored by the temperature sensor 40. Based on the received temperature data monitored by the temperature sensor 40, the driver chip 50 can provide a pulse signal to control the light emission duration of the light-emitting element 20 electrically connected to the first type of pixel circuit 10A. This pulse signal is transmitted to the first bonding pad BA1 through the first pin 501 and then to the first type of pixel through the first light emission control signal line L1-EM. Circuit 10A: Based on the temperature data monitored by the temperature sensor 40, the driver chip 50 can provide a pulse signal to control the light emission duration of the light-emitting element 20 electrically connected to the second type of pixel circuit 10B. This pulse signal is transmitted to the second bonding pad BA2 through the second pin 502, and then to the second type of pixel circuit 10B through the second light emission control signal line L2-EM. This enables differentiated driving of different pixel circuits, ensuring that the effective pulse duration provided by the first light emission control signal line L1-EM is greater than the effective pulse duration provided by the second light emission control signal line L2-EM. This ensures the brightness balance of light-emitting elements with different luminous efficiencies and improves the display effect. In addition, the pulse duration transmitted by the light emission control signal line electrically connected to the bonding pad on the display panel 000 can be directly controlled through the pin of the driver chip 50, without relying on the light emission control scanning circuit. This simplifies the panel design and reduces the space occupied in the non-display area.

[0074] It is understood that the driver chip 50 in this embodiment can also integrate and provide control signals such as data writing, reset, and threshold compensation, simplifying the control logic of the display device and driving the display panel 000 to work stably and efficiently.

[0075] It should be noted that in this embodiment... Figure 20 This is merely an illustration of an electrical connection between the display panel 000 and the temperature sensor 40 in a display device, and does not represent the actual installation structure of the temperature sensor 40. In a specific implementation, there can be one or more temperature sensors 40. The temperature sensor 40 can be integrated inside the display panel 000 or externally mounted on the display panel 000, depending on actual needs.

[0076] Optional, such as Figures 1-4 , Figure 7 , Figures 13-16 , Figure 20 In this embodiment, the temperature sensor 40 is electrically connected to the driver chip 50; the driver chip 50 is configured to receive the operating temperature of the display panel 000 monitored by the temperature sensor 40, and adjust the effective pulse duration transmitted from the first pin 501 to the first light emission control signal line L1-EM.

[0077] This embodiment explains that the operating temperature of the display panel 000 monitored by the temperature sensor 40 can be received by the driver chip 50. The internal logic of the driver chip 50 then adjusts the duration of the effective pulse transmitted from the first pin 501 to the first light-emitting control signal line L1-EM, thereby achieving brightness compensation for light-emitting elements with low luminous efficiency. In this embodiment, the driver chip 50 receives the operating temperature data of the display panel 000 tested by the temperature sensor 40 in real time. Based on the changes in the operating temperature of the display panel 000, the internal logic of the driver chip 50 can automatically adjust the duration of the effective pulse output from the first pin 501 to the first light-emitting control signal line L1-EM. Without manual intervention, automatic brightness compensation can be achieved in high-temperature environments, ensuring the stability of display uniformity.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, The device includes multiple pixel circuits, each of which is electrically connected to a light-emitting element. Each pixel circuit includes a driving transistor, a first light-emitting control transistor, and a second light-emitting control transistor. The first light-emitting control transistor is electrically connected between a first power signal terminal and a first electrode of the driving transistor, and the second light-emitting control transistor is electrically connected between a second electrode of the driving transistor and the anode of the light-emitting element. The plurality of pixel circuits include a first type of pixel circuit and a second type of pixel circuit, wherein the luminous efficiency of the light-emitting element electrically connected to the first type of pixel circuit is less than the luminous efficiency of the light-emitting element electrically connected to the second type of pixel circuit; The display panel also includes multiple first light-emitting control signal lines and multiple second light-emitting control signal lines; wherein, The first light emission control signal line is electrically connected to the control terminal of the second light emission control transistor of the first type of pixel circuit, the control terminal of the first light emission control transistor of the first type of pixel circuit, and the control terminal of the first light emission control transistor of the second type of pixel circuit, respectively. The second light-emitting control signal line is electrically connected to the control terminal of the second light-emitting control transistor of the second type of pixel circuit; Within the same display frame, the duration of the effective pulse provided by the first light emission control signal line is longer than the duration of the effective pulse provided by the second light emission control signal line.

2. The display panel according to claim 1, characterized in that, The first type of pixel circuit is electrically connected to the red light-emitting element, and the second type of pixel circuit is electrically connected to the green light-emitting element and / or the blue light-emitting element.

3. The display panel according to claim 1, characterized in that, The first type of pixel circuit is electrically connected to a red light-emitting element, and the second type of pixel circuit includes a first sub-pixel circuit and a second sub-pixel circuit. The first sub-pixel circuit is electrically connected to a green light-emitting element, and the second sub-pixel circuit is electrically connected to a blue light-emitting element. The second light emission control signal line includes a first sub-line and a second sub-line; The first sub-line is electrically connected to the control terminal of the second light-emitting control transistor of the first sub-pixel circuit; The second sub-line is electrically connected to the control terminal of the second light-emitting control transistor of the second sub-pixel circuit; Within the same display frame, the effective pulse duration provided by the first sub-line is longer than the effective pulse duration provided by the second sub-line.

4. The display panel according to claim 1, characterized in that, The pixel circuit also includes a first reset transistor, a second reset transistor, a data writing transistor, and a threshold compensation transistor; The first reset transistor is electrically connected to the control terminal of the drive transistor; The data writing transistor is electrically connected to the first terminal of the driving transistor; The second reset transistor is electrically connected to the anode of the light-emitting element; The threshold compensation transistor is electrically connected between the control terminal and the second terminal of the driving transistor.

5. The display panel according to claim 1, characterized in that, The display panel includes a non-display area, the non-display area includes a light-emitting control scanning circuit, and the light-emitting control scanning circuit includes a first light-emitting control scanning circuit and a second light-emitting control scanning circuit. The first light emission control scanning circuit includes multiple cascaded first light emission shift registers, and the output terminal of the first light emission shift register is electrically connected to the first light emission control signal line; The second light emission control scanning circuit includes multiple cascaded second light emission shift registers, and the output of the second light emission shift registers is electrically connected to the second light emission control signal line.

6. The display panel according to claim 5, characterized in that, The multiple cascaded first light-emitting shift registers include a first start shift register, which is electrically connected to a first start signal; Multiple cascaded second light-emitting shift registers include a second start shift register, which is electrically connected to a second start signal; wherein, Within the same display frame, the effective pulse duration of the first start signal is longer than the effective pulse duration of the second start signal.

7. The display panel according to claim 1, characterized in that, The display panel includes a non-display area, which includes a first bonding pad and a second bonding pad. The first bonding pad is electrically connected to the first light emission control signal line, and the second bonding pad is electrically connected to the second light emission control signal line. Within the same display frame, the effective pulse duration provided by the first bonding pad to the first light-emitting control signal line is greater than the effective pulse duration provided by the second bonding pad to the second light-emitting control signal line.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1-7.

9. The display device according to claim 8, characterized in that, The display device further includes a temperature sensor electrically connected to the display panel, the temperature sensor being configured to monitor the operating temperature of the display panel.

10. The display device according to claim 9, characterized in that, The temperature sensor is integrated into the display panel.

11. The display device according to claim 9, characterized in that, The temperature sensor is located outside the display panel.

12. The display device according to claim 9, characterized in that, The orthographic projection of the temperature sensor onto the plane of the display panel is located in the middle area of ​​the display panel.

13. The display device according to claim 9, characterized in that, The number of temperature sensors includes multiple sensors, and the orthographic projections of the multiple temperature sensors on the plane of the display panel are respectively located in the middle area and the corner area of ​​the display panel.

14. The display device according to claim 9, characterized in that, The duration of the effective pulse provided by the first light-emitting control signal line is directly proportional to the operating temperature of the display panel monitored by the temperature sensor.

15. The display device according to claim 14, characterized in that, The operating temperature of the display panel monitored by the temperature sensor is a first temperature value, and the effective pulse duration provided by the first light emission control signal line is A. The operating temperature of the display panel monitored by the temperature sensor is a second temperature value. If the second temperature value is greater than the first temperature value, then the effective pulse duration provided by the first light emission control signal line is B, and B is greater than A.

16. The display device according to claim 9, characterized in that, The display device further includes a driver chip, which is electrically connected to the display panel.

17. The display device according to claim 16, characterized in that, The display panel includes a non-display area, which includes a first bonding pad and a second bonding pad. The first bonding pad is electrically connected to the first light emission control signal line, and the second bonding pad is electrically connected to the second light emission control signal line. The driver chip includes a first pin and a second pin, wherein the first pin is electrically connected to the first bonding pad and the second pin is electrically connected to the second bonding pad; The driver chip is configured such that, within the same display frame, the effective pulse duration provided by the first pin to the first light-emitting control signal line is greater than the effective pulse duration provided by the second pin to the second light-emitting control signal line.

18. The display device according to claim 17, characterized in that, The temperature sensor is electrically connected to the driver chip; The driver chip is configured to receive the operating temperature of the display panel monitored by the temperature sensor and adjust the duration of the effective pulse transmitted from the first pin to the first light emission control signal line.

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