Display panel, control method thereof and display device

Abstract

The invention provides a display panel, a control method thereof and a display device, the display panel comprises a driving substrate, a light-emitting element, an electrochromic structure and a controller, and the light-emitting element is located on one side of the driving substrate and electrically connected with the driving substrate. The electrochromic structure is located on the light-emitting side of the light-emitting element, and the electrochromic structure is electrically connected with the driving substrate. The controller is configured to control the sizes of the shading area and the light-transmitting opening of the electrochromic structure by adjusting the driving voltage of the driving substrate; along the thickness direction of the display panel, the light-transmitting opening is overlapped with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially shields the emergent light of the light-emitting element. Large-view-angle light of at least part of the light-emitting elements is shielded through the electrochromic structure, so that the problems of color cast of the light-emitting elements of different colors in the large-view-angle direction and color cast of the light-emitting elements of the same color in the left-right-view-angle direction are solved, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] Currently, Micro LED (Micro Light Emitting Diode, MLED) display panels have advantages such as high brightness, excellent contrast, and low power consumption, and their application in daily life and production is becoming increasingly widespread.

[0003] However, the display panel still suffers from problems such as uneven brightness and color deviation, which affect the display effect. Summary of the Invention

[0004] The present invention provides a display panel and its control method and display device, which improves the problem of color deviation of different color light-emitting elements in the wide viewing angle direction and the problem of color deviation of the same color light-emitting elements in the left and right viewing angle directions by setting an electrochromic structure on the light-emitting side of the light-emitting element to block at least part of the light-emitting element's wide viewing angle light.

[0005] In a first aspect, embodiments of the present invention provide a display panel, including:

[0006] Drive substrate;

[0007] A light-emitting element is located on one side of the driving substrate and is electrically connected to the driving substrate;

[0008] An electrochromic structure is located on the light-emitting side of the light-emitting element, and the electrochromic structure is electrically connected to the driving substrate;

[0009] The controller is configured to control the size of the light-shielding area and the light-transmitting opening of the electrochromic structure by adjusting the driving voltage of the driving substrate; along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

[0010] In a second aspect, embodiments of the present invention also provide a method for controlling a display panel, used to control the display panel provided in the first aspect; the control method includes:

[0011] Acquire luminance distribution data of the light-emitting element from various viewing angles;

[0012] A voltage control signal is generated based on the brightness difference from various viewing angles to adjust the size of the light-shielding area and the light-transmitting opening of the electrochromic structure; along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

[0013] Thirdly, embodiments of the present invention also provide a display device, including the display panel provided in the first aspect.

[0014] The display panel provided in this embodiment of the invention includes a driving substrate, a light-emitting element, an electrochromic structure, and a controller. The light-emitting element is located on one side of the driving substrate and is electrically connected to the driving substrate. The electrochromic structure is located on the light-emitting side of the light-emitting element and is electrically connected to the driving substrate. The controller is configured to control the size of the light-shielding area and the light-transmitting opening of the electrochromic structure by adjusting the driving voltage of the driving substrate. Along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element. By blocking at least part of the light from the light-emitting element at a wide viewing angle through the electrochromic structure, the color shift of different colored light-emitting elements in the wide viewing angle direction and the color shift of the same colored light-emitting elements in the left and right viewing angle directions are improved, thereby enhancing the display effect of the display panel. Attached Figure Description

[0015] Figure 1 These are luminance test charts of different color light-emitting elements under different viewing angles, provided by existing technology;

[0016] Figure 2 This is a schematic diagram of a display panel provided in an embodiment of this application;

[0017] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a display panel along the AA' direction;

[0018] Figure 4 This is a schematic diagram of another display panel provided in an embodiment of this application;

[0019] Figure 5 yes Figure 4 A cross-sectional schematic diagram of a display panel along the BB' direction;

[0020] Figure 6 A schematic diagram of another display panel provided in this application embodiment;

[0021] Figure 7 yes Figure 6 A cross-sectional schematic diagram of a display panel along the CC' direction;

[0022] Figure 8 yes Figure 6 A cross-sectional schematic diagram of a display panel along the DD' direction;

[0023] Figure 9 yes Figure 6 A cross-sectional schematic diagram of a display panel along the EE' direction;

[0024] Figure 10 yes Figure 4 A cross-sectional schematic diagram of a display panel along the FF' direction;

[0025] Figure 11 yes Figure 4 A cross-sectional schematic diagram of another type of display panel along the FF' direction;

[0026] Figure 12 This is a schematic diagram of a control method for a display panel provided in an embodiment of this application;

[0027] Figure 13 These are test graphs of the luminous intensity of the light-emitting elements of the display panel in this application under different viewing angles;

[0028] Figure 14 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the present application and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present application are shown in the drawings, not the entire structure. Various modifications and variations can be made to the present application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, the present application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0030] Figure 1 These are luminance test charts of different color light-emitting elements under different viewing angles, provided by existing technology. (Reference) Figure 1 , Figure 1 The horizontal axis represents the light emission angle (°) of the light-emitting element, and the vertical axis represents the luminance at that angle. Luminance represents the luminous flux emitted by the light source per unit projected area (m²) and unit solid angle (sr), typically expressed in nits (cd / m²). 2 The unit of measurement is luminance. Luminance determines the overall brightness and visibility of the screen; the higher the luminance, the better the overall brightness and visibility. The light-emitting element can be LED (Light Emitting Diode), Micro LED (Micro Light Emitting Diode Display), Mini LED (Mini Light Emitting Diode), etc.

[0031] In existing technology, the light-emitting devices in display panels typically use red light-emitting elements (R), green light-emitting elements (G), and blue light-emitting elements (B). The luminance test results for different colored light-emitting elements at different viewing angles are as follows: Figure 1 As shown in the figure. Where LR0 is the luminance of the red light-emitting element R at a 0° viewing angle, LG0 is the luminance of the green light-emitting element G at a 0° viewing angle, LB0 is the luminance of the blue light-emitting element B at a 0° viewing angle, and so on, which will not be elaborated here.

[0032] refer to Figure 1 For different colored light-emitting elements:

[0033] At a 0° viewing angle, LR0≈LG0≈LB0, indicating that the brightness differences among the three are small.

[0034] At a viewing angle of θ2°, LR1 > LG1, LB1. At a viewing angle of θ4°, LR2 > LG2, LB2. This indicates that the red light-emitting element R has a larger color shift at a viewing angle of θ2°.

[0035] For light-emitting elements of the same color, at viewing angles of 0°, θ2°, and θ4°:

[0036] LR1 > LR2 > LR0; LG1, LG2 > LG0; LB1, LB2 > LB0. This indicates that the light-emitting element has a color shift problem at large left and right viewing angles.

[0037] It can be seen that due to the differences in the materials of the light-emitting elements themselves, the brightness of light-emitting elements of different colors (R, G, B) varies in the wide viewing angle direction, and the brightness of light-emitting elements of the same color (R / G / B) also varies in the left and right viewing angle directions. When transferred to the display panel, there is a problem of color deviation, which ultimately affects the display effect of the display panel.

[0038] This invention provides a display panel including a driving substrate, a light-emitting element, an electrochromic structure, and a controller. The light-emitting element is located on one side of the driving substrate and is electrically connected to the driving substrate. The electrochromic structure is located on the light-emitting side of the light-emitting element and is electrically connected to the driving substrate. The controller is configured to control the size of the light-shielding area and the light-transmitting opening of the electrochromic structure by adjusting the driving voltage of the driving substrate; along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

[0039] By adopting the above technical solution, an electrochromic structure is set on the light-emitting side of the light-emitting element. The controller dynamically adjusts the driving voltage of the driving substrate according to the brightness performance of the light-emitting element at different viewing angles to control the ratio of the light-shielding area and the light-transmitting opening of the electrochromic structure. The light-shielding area partially blocks the light from the light-emitting element at a wide viewing angle, while the light-transmitting opening ensures that the light-emitting element emits light at a positive viewing angle. This improves the color shift of different colored light-emitting elements at wide viewing angles and the color shift of the same colored light-emitting elements at left and right viewing angles, thereby improving the display effect of the display panel.

[0040] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] Figure 2 This is a schematic diagram of a display panel provided in an embodiment of this application. Figure 3 yes Figure 1 A cross-sectional schematic diagram of a display panel along the AA' direction. Figure 4 This is a schematic diagram of another display panel provided in an embodiment of this application. Figure 5 yes Figure 4 A cross-sectional schematic diagram of a display panel along the BB' direction. (Reference) Figures 2-5 The display panel 200 provided in this embodiment of the invention includes a driving substrate 30, a light-emitting element 40, an electrochromic structure 50, and a controller. The light-emitting element 40 is located on one side of the driving substrate 30 and is electrically connected to the driving substrate 30. The electrochromic structure 50 is located on the light-emitting side of the light-emitting element 40 and is electrically connected to the driving substrate 30. The controller is configured to control the size of the light-shielding area 51 and the light-transmitting opening 52 of the electrochromic structure 50 by adjusting the driving voltage of the driving substrate 30. Along the thickness direction (z-direction) of the display panel 200, the light-transmitting opening 52 overlaps with the light-emitting surface of the light-emitting element 40, and the light-shielding area 51 at least partially blocks the emitted light from the light-emitting element 40.

[0042] Specifically, the display panel 200 provided in this application embodiment can be an LED display panel, a Micro LED display panel, a Mini LED display panel, etc., and this embodiment of the invention does not limit the type of display panel. The light-emitting element 40 can be an LED, a Micro-LED, a Mini-LED, etc., and this embodiment of the invention does not limit it.

[0043] The controller can be the driver chip (integrated circuit, IC) of the display panel 200 (not shown in the figure), or a separately configured processor. For example, it can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The controller stores the control program for controlling the electrochromic structure 50 to change color.

[0044] The electrochromic structure 50 is a functional layer whose optical properties can be adjusted by an external voltage. In this application, the electrochromic structure 50 is disposed on the light-emitting side of the light-emitting element 40. The controller dynamically adjusts the driving voltage of the electrochromic structure 50 according to the brightness performance of the light-emitting element 40 at different viewing angles, and controls the ratio of the light-shielding area 51 to the light-transmitting opening 52. The light-shielding area 51 can block part of the light from the light-emitting element 40 at a wide viewing angle, thereby sacrificing the light from the high-brightness light-emitting element 40 at a wide viewing angle, balancing the display brightness of each light-emitting element 40, thereby improving the color deviation of the light-emitting element 40, optimizing the color consistency at different viewing angles, and improving the display effect of the display panel.

[0045] The light-shielding area 51, projected onto the driving substrate 30, at least partially surrounds the light-emitting element 40. Its area can be dynamically adjusted to control the light transmittance at wide viewing angles, thereby controlling the light emission angle and contrast of the display panel. The light-transmitting opening 52, projected onto the driving substrate 30, completely covers the light-emitting surface of the light-emitting element 40, ensuring effective light output at the positive viewing angle and guaranteeing normal display of the display panel.

[0046] Here, the positive viewing angle refers to the direction in which the light-emitting element 40 emits light along the display panel 200, which can also be understood as... Figure 3 and Figure 5 The z-direction in the middle.

[0047] As an example, the electrochromic structure 50 can be made of inorganic (such as WO3) or organic (such as conductive polymer) electrochromic materials, etc., and the embodiments of this application are not limited thereto.

[0048] In some applications, such as dynamically adjusting the driving voltage of the electrochromic structure 50 to change the color-changing area and adjust the ratio of the light-blocking area 51 to the light-transmitting opening 52, it is also possible to suppress inter-pixel crosstalk and improve the display effect of High Dynamic Range Imaging (HDR).

[0049] In some applications, such as privacy displays, the privacy viewing angle mode of the display panel can be switched by dynamically adjusting the size of the light-blocking area 51, thereby improving the privacy performance of the display panel.

[0050] In some applications, such as combining the local dimming display of the light-emitting element 40 with the color-changing electrochromic structure 50, dynamic contrast can be enhanced to achieve a deeper black display effect.

[0051] It should be noted that the reference Figure 3 and Figure 4 The display panel 200 also includes other functional film layers, such as the first encapsulation layer 61 and the second encapsulation layer 62. Multiple film layers work together to achieve normal display of the display panel, which will not be described in detail here.

[0052] In summary, the display panel provided by the embodiments of the present invention, by setting an electrochromic structure on the light-emitting side of the light-emitting element, and the controller dynamically adjusting the driving voltage of the driving substrate according to the brightness performance of the light-emitting element at different viewing angles, controls the ratio of the light-shielding area and the light-transmitting opening of the electrochromic structure, uses the light-shielding area to block part of the light from the light-emitting element at a large viewing angle, reduces the color deviation of the light-emitting element at a large viewing angle, and ensures that the light-emitting element emits light at a positive viewing angle through the light-transmitting opening, thereby improving the color deviation of the light-emitting element, optimizing the color consistency at different viewing angles, and improving the display effect of the display panel.

[0053] In some embodiments, the electrochromic structure 50 includes a transparent state and a light-blocking state.

[0054] refer to Figure 2 and Figure 3 When the electrochromic structure 50 is not energized, it is in a transparent state.

[0055] refer to Figure 4 and Figure 5 When the electrochromic structure 50 is energized, some areas are in a light-blocking state.

[0056] Specifically, in this embodiment, the electrochromic structure 50 changes color to a light-blocking state when powered on and is transparent when not powered on. With this configuration, power is only consumed when switching between the transparent and light-blocking states, and no continuous power supply is required when maintaining the static state, which helps to reduce the power consumption of the display panel.

[0057] For example, refer to Figure 2 and Figure 3When the controller does not provide a driving voltage to the electrochromic structure 50, the electrochromic structure 50 is not energized, does not change color, and is completely transparent.

[0058] refer to Figure 4 and Figure 5 When the controller provides a driving voltage to the electrochromic structure 50, the electrochromic structure 50 is energized, and some areas change color to form a light-blocking area 51, while the uncolored areas form a light-transmitting opening 52. By dynamically adjusting the magnitude of the driving voltage, the ratio of the light-blocking area 51 to the light-transmitting opening 52 can be adjusted, so that the light-blocking area 51 can block light from the light-emitting element 40 from different viewing angles, thereby improving color shift.

[0059] As an example, the electrochromic structure 50 can also be controlled to switch between transparent and opaque states in milliseconds to adapt to the high refresh rate display of the display panel (such as 120Hz+).

[0060] In some embodiments, continue to refer to Figure 4 The light-emitting element 40 includes a red light-emitting element 40. R 40 green light-emitting elements G and blue light-emitting element 40 B When powered on, the red light-emitting element 40... R The corresponding light-transmitting opening 52 has an opening area of ​​M. R 40 green light-emitting elements G The corresponding light-transmitting opening 52 has an opening area of ​​M. G Blue light-emitting element 40 B The corresponding light-transmitting opening 52 has an opening area of ​​M. B ; Satisfies: M R <M G ≤M B .

[0061] Due to differences in luminescent materials, the red luminescent element 40 R Typically, the luminance at a viewing angle is 40 times higher than that of green light-emitting elements. G and blue light-emitting element 40 B This application is based on a red light-emitting element 40. R Brightness performance under different viewing angles, controlling the red light-emitting element 40 R The driving voltage of the corresponding electrochromic structure 50 makes the opening area of ​​the electrochromic structure 50 M. R The opening area is M G The opening area is M B Satisfying the above relationship, the red light-emitting element 40 is selectively blocked by the light-blocking area 51. RThe emitted light beams have a wide viewing angle, which reduces the relative brightness at a wide viewing angle. This balances the brightness difference of the RGB three-color light-emitting elements at different viewing angles. This adjustment can significantly improve the multi-viewing angle bias and enhance the uniformity of the display.

[0062] Figure 6 A schematic diagram of another display panel provided in this application embodiment is shown. Figure 7 yes Figure 6 A cross-sectional schematic diagram of a display panel along the CC' direction, based on the above embodiment, with reference to... Figure 6 and Figure 7 The electrochromic structure 50 includes multiple independent light-shielding units 501, and the light-emitting element 40 corresponds to at least one light-shielding unit 501. The driving substrate 30 includes multiple light-shielding driving circuits, which are electrically connected to the light-shielding units 501 respectively. When energized, the light-shielding area of ​​the light-shielding unit 501 changes linearly with the voltage.

[0063] For example, refer to Figure 6 The electrochromic structure 50 can be composed of multiple independent light-shielding units 501 arranged in an array, with each light-emitting element 40 corresponding to at least one light-shielding unit 501. The driving substrate 30 integrates a light-shielding driving circuit 31 corresponding to each light-shielding unit 501. In this application, the light-shielding driving circuit 31 is integrated on the driving substrate 30, which helps to reduce the difficulty of manufacturing the driving circuit of the display panel. The light-shielding unit 501 has the characteristic of linear response between driving voltage and light-shielding area when energized, and the coverage of its light-shielding area 51 is continuously adjustable with the driving voltage.

[0064] For example, the light-shielding driving circuit 31 provides a high voltage to the electrochromic structure 50, expanding the area of ​​the light-shielding region 51 and increasing the amount of light blocked from the light-emitting element 40 over a wide viewing angle. The light-transmitting opening 52 shrinks, reducing the brightness over a wide viewing angle, thereby optimizing the viewing angle distortion. Alternatively, the light-shielding driving circuit 31 provides a low voltage to the electrochromic structure 50, reducing the area of ​​the light-shielding region 51 and enlarging the light-transmitting opening 52, thereby increasing the brightness of the light-emitting element 40 at a normal viewing angle.

[0065] Figure 8 yes Figure 6 A cross-sectional schematic diagram of a display panel along the DD' direction is shown below. Further reference is made to the above embodiment. Figure 8 The light-emitting element 40 includes a first light-emitting element 41, a second light-emitting element 42, and a third light-emitting element 43. In this embodiment, the first light-emitting element 41, the second light-emitting element 42, and the third light-emitting element 43 emit different colors. The light-shielding unit 501 includes a first light-shielding unit 50a, a second light-shielding unit 50b, and a third light-shielding unit 50c.

[0066] Specifically, the first light-shielding unit 50a corresponds to the first light-emitting element 41, the second light-shielding unit 50b corresponds to the second light-emitting element 42, and the third light-shielding unit 50c corresponds to the third light-emitting element 43. The light-shielding driving circuit 31 includes a first light-shielding driving circuit 31a, a second light-shielding driving circuit 31b, and a third light-shielding driving circuit 31c. The first light-shielding driving circuit 31a is electrically connected to the first light-shielding unit 50a, the second light-shielding driving circuit 31b is electrically connected to the second light-shielding unit 50b, and the third light-shielding driving circuit 31c is electrically connected to the third light-shielding unit 50c. The driving voltage V1 of the first light-shielding driving circuit 31a is greater than the driving voltage V2 of the second light-shielding driving circuit 31b, and the driving voltage V2 of the second light-shielding driving circuit 31b is greater than or equal to the driving voltage V3 of the third light-shielding driving circuit 31c.

[0067] Specifically, the electrochromic structure 50 is patterned into multiple independent light-shielding units, each light-shielding unit corresponding to a light-emitting element 40. The driving circuit sets differentiated driving voltages for light-emitting elements 40 with different emission colors, so that the color-changing area of ​​the light-shielding unit corresponding to the light-emitting side of the light-emitting element 40 with different emission colors is different.

[0068] For example, the first light-shielding driving circuit 31a outputs a driving voltage V1 to the first light-shielding unit 50a, the second light-shielding driving circuit 31b outputs a driving voltage V2 to the second light-shielding unit 50b, and the third light-shielding driving circuit 31c outputs a driving voltage V3 to the third light-shielding unit 50c, satisfying the voltage relationship: V1>V2≥V3.

[0069] This driving method allows the light-shielding area of ​​the first light-shielding unit 50a to be larger than that of the second light-shielding unit 50b, and the light-shielding area of ​​the second light-shielding unit 50b to be greater than or equal to that of the third light-shielding unit 50c. This helps to improve the large viewing angle of the first light-emitting element 41 and balance the brightness of different light-emitting colors.

[0070] Among them, two adjacent light-emitting elements can also share a light-shielding driving circuit and a light-shielding unit. For example, the first light-shielding unit 50a and the second light-shielding unit 50b between the first light-emitting element 41 and the second light-emitting element 42 can be the same light-shielding unit, or they can be understood as an integral set. By adjusting the magnitude of the driving voltage, the transmission opening area of ​​the first light-emitting element 41 and the third light-shielding unit 50c can be adjusted together.

[0071] Further reference Figure 7 and Figure 8The driving substrate 30 also includes a pixel driving circuit 32, which is connected to the light-emitting element 40 and is used to provide a driving voltage to the light-emitting element 40 and control the brightness of the light-emitting element 40, etc. The pixel driving circuit can be a 2T1C, 4T1C, 7T1C, 7T2C, 8T1C, 8T2C, etc. circuit structure. The pixel driving circuit includes multiple thin film transistors (TFTs), storage capacitors, and metal traces, etc. (not shown in the accompanying drawings of this embodiment). Those skilled in the art should understand this clearly, and it will not be described in detail here.

[0072] Based on the above embodiments, continue to refer to Figure 7 The electrochromic structure 50 includes a fourth light-shielding unit 50d and a fifth light-shielding unit 50e. The light-shielding driving circuit 31 includes a fourth light-shielding driving circuit 31d and a fifth light-shielding driving circuit 31e. The fourth light-shielding driving circuit 31d is electrically connected to the fourth light-shielding unit 50d, and the fifth light-shielding driving circuit 31e is electrically connected to the fifth light-shielding unit 50e. Along the first direction X, the fourth light-shielding unit 50d and the fifth light-shielding unit 50e are located on opposite sides of the light-emitting element 40. When energized, the driving voltages of the fourth light-shielding driving circuit 31d and the fifth light-shielding driving circuit 31e are different. The first direction X is parallel to the plane of the driving substrate 30.

[0073] To address the issue of color shift along the X-direction in the same-color light-emitting element 40, embodiments of this application can apply different asymmetric driving voltages to the fourth light-shielding unit 50d and the fifth light-shielding unit 50e corresponding to the light-emitting element 40, so that the light-shielding areas of the fourth light-shielding unit 50d and the fifth light-shielding unit 50e are different, thereby improving the problem of large apparent color shift of the light-emitting element 40 along the X-direction.

[0074] Based on the above embodiments, continue to refer to Figure 7 The driving voltage V4 of the fifth light-shielding driving circuit 31e is less than the driving voltage V5 of the fourth light-shielding driving circuit 31d, i.e., V4 < V5. Along Figure 7 In the X direction, the first distance between the side of the fourth light-shielding unit 50d closest to the light-emitting element 40 and the central axis of the light-emitting element 40 is A1, and the second distance between the side of the fifth light-shielding unit 50e closest to the light-emitting element 40 and the central axis of the light-emitting element 40 is A2, satisfying: A1 > A2.

[0075] Specifically, when the light-emitting element 40 emits light, V4 is controlled to be less than V5. Along Figure 7In the X direction, the fourth light-shielding unit 50d has a larger light-shielding area than the fifth light-shielding unit 50e, where A1 > A2. With this configuration, the fourth light-shielding unit 50d can block large-angle light rays emitted within at least the α angle range, and the fourth light-shielding unit 50d can block large-angle light rays emitted within at least the β angle range, with α < β. This improves the light-emitting element 40 along the X direction. Figure 7 The issue of color shift in the X direction (left and right). The light-emitting element 40 can be any one of a red, green, or blue light-emitting element.

[0076] Based on the above embodiments, the display grayscale of the light-emitting element 40 includes a first grayscale and a second grayscale, wherein the first grayscale is smaller than the second grayscale. In the first grayscale, the difference between the first distance A1 and the second distance A2 is δ1; in the second grayscale, the difference between the first distance A1 and the second distance A2 is δ2. This satisfies: δ1 > δ2.

[0077] Gray scale refers to the transition levels of different brightness levels between the darkest (black) and the brightest (white) in an image or display device, usually expressed in bits.

[0078] For example, an 8-bit display panel can display 2 8 =256 grayscale levels (0~255), where 0 is pure black and 255 is pure white. Tests revealed that when the display panel is displayed at low grayscale levels, the viewing angle appears larger, while when the display panel is displayed at high grayscale levels, the viewing angle appears smaller.

[0079] As an example, taking the first grayscale level as a low grayscale level, ranging from 0 to 150, and the second grayscale level as a high grayscale level, ranging from 150 to 255, this embodiment of the application can also dynamically adjust the driving voltage of the light-shielding unit according to the display grayscale of the display panel. Specifically:

[0080] When the display panel operates at a low grayscale, the driving voltage of the light-shielding unit is controlled so that the difference between the first distance A1 and the second distance A2 is A. 1- A2 = δ1.

[0081] When the display panel operates at a high grayscale, the difference between the driving voltage of the light-shielding unit at the first distance A1 and the second distance A2 is A. 1- A2 = δ2.

[0082] By satisfying δ1 > δ2, and thus driving the adjustment, the fourth shading unit 50d and the fifth shading unit 50e can be further precisely adjusted along their respective axes. Figure 7 The shading range and shading angle in the X direction (left and right).

[0083] In summary, this application combines the display grayscale with the shading range of the fourth shading unit 50d and the fifth shading unit 50e, which can effectively improve the performance of the light-emitting element 40. Figure 7 The color shift in the X direction (left and right) improves the uniformity of light output from the light-emitting element 40.

[0084] Figure 9 yes Figure 6 A cross-sectional schematic diagram of a display panel along the EE' direction, based on the above embodiment, with reference to... Figure 9 The light-emitting element 40 includes a fourth light-emitting element 44 and a fifth light-emitting element 45, both emitting the same color. For the same emitted color, the grayscale of the fourth light-emitting element 44 is smaller than that of the fifth light-emitting element 45. The opening area of ​​the light-transmitting opening 52 of the electrochromic structure 50 corresponding to the fourth light-emitting element 44 is larger than that of the light-transmitting opening 52 of the electrochromic structure 50 corresponding to the fifth light-emitting element 45.

[0085] Specifically, due to issues such as poor transfer bonding uniformity during the transfer of the light-emitting element 40 to the driving substrate 30, light-emitting elements 40 of the same color may exhibit different grayscale levels under the same driving voltage, affecting the final display. Therefore, embodiments of this application can further differentiate the opening areas of the light-transmitting openings 52 of the electrochromic structure 50 corresponding to light-emitting elements 40 of the same color to achieve a more balanced grayscale display.

[0086] As an example, this application dynamically adjusts the driving voltage of the electrochromic structure 50. When the grayscale of the fifth light-emitting element 45 is higher than that of the fourth light-emitting element 44, the light-shielding unit 501 corresponding to the light-emitting side of the fifth light-emitting element 45 is controlled to automatically reduce the opening area of ​​its light-transmitting opening 52, forming a gradient aperture effect. Without changing the driving current of the light-emitting element 40, the light output of the fifth light-emitting element 45 with a high grayscale can be made to approach that of the fourth light-emitting element 44 with a low grayscale, balancing the brightness of light-emitting elements of the same color and improving display uniformity.

[0087] Based on the above embodiments, continue to refer to Figure 4 , Figure 6 Multiple light-emitting elements 40 are arranged sequentially along the first direction X. During the display stage, the display grayscale of the multiple light-emitting elements 40 changes linearly, and the opening area of ​​the light-transmitting opening 52 of the electrochromic structure 50 corresponding to the multiple light-emitting elements 40 changes linearly in the opposite direction.

[0088] As an example, during the display stage, if it is detected that the display grayscale of multiple light-emitting elements 40 decreases along the X direction (brightness gradually decreases), this embodiment can also dynamically reduce the light-transmitting opening of the electrochromic structure 50 corresponding to the high grayscale light-emitting element 40 to match the light output of the high brightness area with the low brightness area, thereby improving the display uniformity in the X direction.

[0089] Figure 10 yes Figure 4 A cross-sectional schematic diagram of a display panel along the FF' direction, based on the above embodiment, with reference to... Figure 10 The light-shielding unit 501 further includes a sixth light-shielding unit 50f and a seventh light-shielding unit 50g. The light-shielding driving circuit 31 also includes a sixth light-shielding driving circuit 31f and a seventh light-shielding driving circuit 31g. The sixth light-shielding driving circuit 31f is electrically connected to the sixth light-shielding unit 50f. The seventh light-shielding driving circuit 31g is electrically connected to the seventh light-shielding unit 50g. Along the second direction Y, the sixth light-shielding unit 50f and the seventh light-shielding unit 50g are located on both sides of the light-emitting element 40. When energized, the driving voltages of the sixth light-shielding driving circuit 31f and the seventh light-shielding driving circuit 31g are the same. The first direction X intersects the second direction Y.

[0090] Specifically, for the light-emitting element 40 with a small color deviation in the Y direction, this embodiment can apply an equal driving voltage to the sixth light-shielding unit 50f and the seventh light-shielding unit 50g to form a symmetrical light-shielding angle, α, in the Y direction. This ensures that the edges of the light-shielding areas of the sixth light-shielding unit 50f and the seventh light-shielding unit 50g are at the same distance from the central axis of the light-emitting element 40, i.e., A3. This solution maintains display consistency in the Y direction and simplifies the control logic of the electrochromic structure 50.

[0091] Figure 11 yes Figure 4 A cross-sectional schematic diagram of another display panel along the FF' direction, based on the above embodiment, with reference to... Figure 11 The electrochromic structure 50 also includes multiple black matrices BM, which are located on both sides of the light-emitting element 40 along the second direction Y. In this embodiment, the black matrices BM can also be symmetrically arranged on the light-emitting side of the light-emitting element 40 along the Y direction to form a symmetrical fixed light-blocking angle α, thereby reducing the structural design and control logic of the electrochromic structure 50.

[0092] Based on the above embodiments, continue to refer to Figure 7The light-shielding unit 501 includes a first electrode 51a, an electroluminescent light-shielding layer 51b, and a second electrode 51c stacked sequentially. The first electrode 51a and the second electrode 51c are electrically connected to the light-shielding driving circuit 31. In this embodiment, the light-shielding unit 501 may adopt a sandwich stacking structure, and the first electrode 51a and the second electrode 51c are electrically coupled to the light-shielding driving circuit 31 through an interconnection structure.

[0093] Optionally, the electrochromic light-shielding layer 51b includes WO3, NiO, or a composite film of WO3 and NiO. Exemplarily, the electrochromic light-shielding layer 51b is composed of an electrochromic material and can be deposited by sputtering, with a thickness of 100-500 nm. The electrochromic light-shielding layer 51b is transparent in the absence of an electric field, and under the influence of an electric field, it undergoes electrochromic transformation to become light-shielding as the electric field intensifies.

[0094] In some embodiments, continue to refer to Figure 2 The electroluminescent light-shielding layer 51b is a single, continuous layer. Specifically, the electroluminescent light-shielding layer 51b can be a continuous thin film, forming a coplanar structure that covers the entire light-emitting surface of the display panel. In some embodiments, reference... Figure 6 and Figure 7 Each light-shielding unit has an independent electroluminescent layer 51b. Specifically, the electroluminescent layer 51b in the multiple light-shielding units 501 is a physically isolated array of independent units.

[0095] Along the thickness direction of the display panel 200 ( Figure 7 In the Z-direction, the first electrode 51a and the second electrode 51c overlap with the center of the electroluminescent shielding layer 51b. Specifically, along... Figure 7 In the Z-direction, this application establishes a predetermined overlap between the projected regions of the first electrode 51a and the second electrode 51c and the centroid region of the electroluminescent layer 51b, thereby increasing the charge carriers (H) in the electroluminescent layer 51b. + / Li+) in electric field strength E≥E_ th When the threshold field strength is reached, it exhibits radial diffusion characteristics, thereby enabling the regulation of ion migration in the electrochromic shading layer 51b and achieving the purpose of electrochromic transformation.

[0096] As an example, see reference Figure 7 The controller increases the driving voltage of the first electrode 51a and the second electrode 51c through the light-shielding drive circuit, thereby increasing the charge carriers (H) in the electro-shielding layer 51b. + Under the influence of a high electric field, the light-blocking area of ​​ / Li+ diffuses radially after electrochromism, and the light-blocking range of the outer edge increases.

[0097] Based on the same inventive concept, this application also provides a method for controlling a display panel, used to control the display panel 200 provided in the above embodiments. Figure 12 This is a schematic diagram of a display panel control method provided in an embodiment of this application. Figure 13 These are luminance test diagrams of the light-emitting elements of the display panel of this application under different viewing angles, for reference. Figures 2-13 As shown, the control methods include;

[0098] S101. Obtain the luminance distribution data of the light-emitting element from various viewing angles.

[0099] Specifically, the luminance distribution data of the light-emitting elements 40 of the display panel 200 at various viewing angles are obtained in advance through an optical measurement system, and a database of viewing angle-luminance correspondence is established.

[0100] Examples include luminance meters, high-brightness LED testing systems, etc., and the embodiments of this application are not limited to these.

[0101] S102. Generate a voltage control signal based on the brightness difference from various viewing angles, adjust the size of the light-shielding area and the light-transmitting opening of the electrochromic structure, along the thickness direction of the display panel, so that the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

[0102] Specifically, the controller generates a driving voltage signal based on the pre-measured viewing angle-luminance distribution data and the luminance difference at various viewing angles of the display panel. This signal is then dynamically adjusted by the light-shielding driving circuit to control the driving voltage of the electrochromic structure 50, achieving linear control of the area of ​​the light-transmitting opening 52. The color-changing area of ​​the electrochromic structure 50 forms a light-shielding area 51, selectively blocking the light emitted from the light-emitting element 40 over a wide viewing angle. The non-color-changing area of ​​the electrochromic structure 50 forms the light-transmitting opening 52, ensuring that light from the light-emitting element 40 can pass through at a normal viewing angle.

[0103] This application embodiment uses closed-loop feedback control of viewing angle and luminance to dynamically calibrate the luminance of the light-emitting element 40 at various viewing angles when the display panel refreshes every frame, thereby achieving luminance consistency across all viewing angles and effectively improving the color shift problem.

[0104] For example, the light transmittance of the dynamically adjusted shading area 51 is ≤0.1%, and the light transmittance of the light-transmitting opening area 52 is ≥85%. Figure 13 As shown, the luminance of the light-emitting elements 40 of different colors at viewing angles of 0°, θ2°, and θ3° is close to equal for LR1', LG1', LB1', LR2', LG2', and LB2'.

[0105] Based on the above embodiments, in step S102, a voltage control signal is generated according to the luminance difference from various viewing angles to adjust the size of the light-blocking area and the light-transmitting opening of the electrochromic structure, including:

[0106] S11. Along the first direction, obtain the luminance of the light-emitting element from the first viewing angle and the luminance from the second viewing angle.

[0107] S12. When the brightness difference between the first viewpoint and the second viewpoint exceeds the first threshold, the driving voltage of the shading unit corresponding to the first viewpoint region is controlled to be greater than the driving voltage of the shading unit corresponding to the second viewpoint region.

[0108] Among them, along the first direction X, the first viewing angle and the second viewing angle are symmetrical about the normal of the center of the light-emitting surface of the light-emitting element 40.

[0109] For example, refer to Figure 8 ,along Figure 8 The luminance value of the light-emitting element 40 under symmetrical dual-viewpoints is measured in the first direction (X-axis). The first viewpoint θ1 and the second viewpoint θ2 are symmetrically distributed about the normal of the light-emitting surface of the light-emitting element 40. The luminance of the first viewpoint θ1 is recorded as L1 and the luminance of the second viewpoint θ2 is recorded as L2. The luminance deviation δ = L1 - L2 is calculated.

[0110] When the luminance deviation δ exceeds the first threshold L 01 When the brightness difference between the first viewing angle θ1 and the second viewing angle θ2 is too large, the luminance of the left viewing angle is too high, resulting in a color shift problem. At this time, the controller triggers luminance compensation, dynamically adjusting the driving voltage of the second light-blocking unit 50b corresponding to the first viewing angle θ1 region to be greater than the driving voltage of the second light-blocking unit 50b corresponding to the second viewing angle θ2 region, thereby increasing the blocking of light from the first viewing angle θ1, so that the luminance of the light-emitting element 40 is consistent under the first viewing angle θ1 and the second viewing angle θ2, thereby improving the left and right color shift problem.

[0111] Based on the above embodiments, in step 102, a voltage control signal is generated according to the luminance difference from various viewing angles to adjust the size of the light-blocking area and the light-transmitting opening of the electrochromic structure, including:

[0112] S21. Obtain the luminance of light-emitting elements 40 of different colors at the same viewing angle.

[0113] S22. When the luminance difference between any two viewing angles exceeds the second threshold, the driving voltage of the shading unit corresponding to the high-luminance light-emitting element is controlled to be greater than the driving voltage of the shading unit corresponding to the low-luminance light-emitting element.

[0114] For example, continue to refer to Figure 8 ,along Figure 8The luminance of the first light-emitting element 41, the second light-emitting element 42, and the third light-emitting element 43 under the second viewing angle θ2 is measured in the first direction (X-axis), and is as follows:

[0115] L 21 L 22 L 23 Compare the size relationships among the three.

[0116] For example, when L 21 >L 22 >L 23 At that time, calculate the luminance difference between any two values. Record δ1 = L 21 -L 22 δ2=L 22 -L 23 δ3=L 21 -L 23 .

[0117] When any one of the luminance deviations δ1, δ2, and δ3 exceeds the second threshold L 02 This indicates that the brightness difference of the light-emitting elements 40 with different emitting colors is too large at the second viewing angle θ2, and there is a color shift problem.

[0118] For example, when the luminance deviation δ1 exceeds the second threshold L 02 At this time, the controller triggers luminance compensation, dynamically adjusting the driving voltage of the first light-emitting element 41 in the second viewing angle θ2 region to be greater than the driving voltage of the second light-shielding unit 50b corresponding to the first light-emitting element 41 in the second viewing angle θ2 region. This reduces the light-transmitting opening area and increases the blocking of the light from the first light-emitting element 41 by the first light-shielding unit 50a in the second viewing angle θ2 region, so that the luminance of the first light-emitting element 41 and the second light-emitting element 42 is consistent in the second viewing angle θ2, thereby improving the problem of large viewing angle color deviation of different color light-emitting elements.

[0119] Based on the above embodiments, before acquiring the luminance distribution data of the light-emitting element 40 at various viewing angles in step 101, the control method further includes;

[0120] Acquire and store the relationship between the driving voltage of the electrochromic structure and the size of the shading area and the light-transmitting opening.

[0121] Specifically, regarding the electrochromic structure 50 provided in this application embodiment, under a standardized testing environment, the electrochromic structure 50 is pre-parametrically characterized. The size of the color-changing shading area and the light-transmitting opening of the electrochromic structure 50 under different driving voltages are pre-tested, and the relationship between the driving voltage V and the area A of the shading area is established. s Mapping relationship: A s =f(V), which is stored in the controller as dynamically adjusted data.

[0122] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 14 This is a schematic diagram of a display device provided in an embodiment of the present invention. (In conjunction with...) Figure 14 As shown, the display device 300 includes any of the display panels 200 provided in the above embodiments. Therefore, the display device 300 also has the beneficial effects of the display panels 200 in the above embodiments. The similarities can be understood with reference to the explanation of the display panels 200 above, and will not be repeated below.

[0123] The display device 300 provided in this embodiment of the invention can be Figure 14 The mobile phone shown can also be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, in-vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. The embodiments of the present invention do not make any special limitations on this.

[0124] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Features of various embodiments of the present invention can be partially or wholly coupled or combined with each other, and can cooperate and be technically driven in various ways. Various obvious changes, readjustments, combinations, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, include: Drive substrate; A light-emitting element is located on one side of the driving substrate and is electrically connected to the driving substrate; An electrochromic structure is located on the light-emitting side of the light-emitting element, and the electrochromic structure is electrically connected to the driving substrate; The controller is configured to control the size of the light-shielding area and the light-transmitting opening of the electrochromic structure by adjusting the driving voltage of the driving substrate; along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

2. The display panel according to claim 1, characterized in that, The electrochromic structure includes a transparent state and a light-blocking state. When the electrochromic structure is not energized, it is in the transparent state; When the electrochromic structure is energized, a portion of the region is in the light-shielding state.

3. The display panel according to claim 1, characterized in that, The light-emitting elements include red light-emitting elements, green light-emitting elements, and blue light-emitting elements; When energized, the opening area of ​​the light-transmitting opening corresponding to the red light-emitting element is M. R The opening area of ​​the light-transmitting opening corresponding to the green light-emitting element is M. G The opening area of ​​the light-transmitting opening corresponding to the blue light-emitting element is M. B ; Satisfies: M R <M G ≤M B .

4. The display panel according to claim 1, characterized in that, The electrochromic structure includes multiple independent light-shielding units, and the light-emitting element corresponds to at least one of the light-shielding units; The driving substrate includes multiple light-shielding driving circuits, which are electrically connected to the light-shielding unit respectively. When energized, the light-shielding area of ​​the light-shielding unit changes linearly with the voltage.

5. The display panel according to claim 4, characterized in that, The light-emitting element includes a first light-emitting element, a second light-emitting element, and a third light-emitting element; The light-shielding unit includes a first light-shielding unit, a second light-shielding unit, and a third light-shielding unit; the first light-shielding unit corresponds to the first light-emitting element, the second light-shielding unit corresponds to the second light-emitting element, and the third light-shielding unit corresponds to the third light-emitting element. The light-shielding driving circuit includes a first light-shielding driving circuit, a second light-shielding driving circuit, and a third light-shielding driving circuit; the first light-shielding driving circuit is electrically connected to the first light-shielding unit, the second light-shielding driving circuit is electrically connected to the second light-shielding unit, and the third light-shielding driving circuit is electrically connected to the third light-shielding unit. The driving voltage of the first light-shielding driving circuit is greater than the driving voltage of the second light-shielding driving circuit, and the driving voltage of the second light-shielding driving circuit is greater than or equal to the driving voltage of the third light-shielding driving circuit.

6. The display panel according to claim 4, characterized in that, The electrochromic structure includes a fourth light-shielding unit and a fifth light-shielding unit; The light-shielding driving circuit includes a fourth light-shielding driving circuit and a fifth light-shielding driving circuit; the fourth light-shielding driving circuit is electrically connected to the fourth light-shielding unit; the fifth light-shielding driving circuit is electrically connected to the fifth light-shielding unit. Along the first direction, the fourth light-shielding unit and the fifth light-shielding unit are respectively located on both sides of the light-emitting element; when energized, the driving voltages of the fourth light-shielding driving circuit and the fifth light-shielding driving circuit are different; wherein, the first direction is parallel to the plane where the driving substrate is located.

7. The display panel according to claim 6, characterized in that, The driving voltage of the fifth light-shielding driving circuit is less than the driving voltage of the fourth light-shielding driving circuit. Along the first direction, the first distance between the side of the light-shielding area of ​​the fourth light-shielding unit closest to the light-emitting element and the central axis of the light-emitting element is A1, and the second distance between the side of the light-shielding area of ​​the fifth light-shielding unit closest to the light-emitting element and the central axis of the light-emitting element is A2, satisfying: A1 > A2.

8. The display panel according to claim 7, characterized in that, The display grayscale of the light-emitting element includes a first grayscale and a second grayscale; wherein the first grayscale is smaller than the second grayscale; In the first grayscale, the difference between the first distance and the second distance is δ1; In the second grayscale, the difference between the first distance and the second distance is δ2; The condition is satisfied that δ1 > δ2.

9. The display panel according to claim 1, characterized in that, The light-emitting element includes a fourth light-emitting element and a fifth light-emitting element, and the fourth light-emitting element and the fifth light-emitting element emit the same color. The grayscale of the fourth light-emitting element is smaller than that of the fifth light-emitting element; The opening area of ​​the light-transmitting opening of the electrochromic structure corresponding to the fourth light-emitting element is greater than the opening area of ​​the light-transmitting opening of the electrochromic structure corresponding to the fifth light-emitting element.

10. The display panel according to claim 1, characterized in that, The plurality of light-emitting elements are arranged sequentially along a first direction; wherein the first direction is parallel to the plane on which the driving substrate is located. During the display phase, the grayscale of the multiple light-emitting elements changes linearly, and the opening area of ​​the light-transmitting opening of the electrochromic structure corresponding to the multiple light-emitting elements changes inversely linearly.

11. The display panel according to claim 6, characterized in that, The electrochromic structure also includes a sixth light-shielding unit and a seventh light-shielding unit; The light-shielding driving circuit further includes a sixth light-shielding driving circuit and a seventh light-shielding driving circuit; The sixth light-shielding driving circuit is electrically connected to the sixth light-shielding unit; the seventh light-shielding driving circuit is electrically connected to the seventh light-shielding unit; Along the second direction, the sixth light-shielding unit and the seventh light-shielding unit are respectively located on both sides of the light-emitting element; when energized, the driving voltages of the sixth light-shielding driving circuit and the seventh light-shielding driving circuit are the same; wherein, the first direction intersects the second direction and is parallel to the plane where the driving substrate is located.

12. The display panel according to claim 6, characterized in that, The electrochromic structure also includes multiple black matrices, located on both sides of the light-emitting element along the second direction.

13. The display panel according to claim 4, characterized in that, The light-shielding unit includes a first electrode, an electroluminescent light-shielding layer, and a second electrode stacked sequentially. The first electrode and the second electrode are electrically connected to the light-shielding drive circuit.

14. The display panel according to claim 13, characterized in that, The electroluminescent light-shielding layer is a single layer; or, the electroluminescent light-shielding layer in each of the light-shielding units is an independent structure. Along the thickness direction of the display panel, the first electrode and the second electrode overlap with the center position of the electroluminescent shielding layer.

15. The display panel according to claim 13, characterized in that, The electroluminescent layer comprises WO3, NiO, or a composite film of WO3 and NiO.

16. A method for controlling a display panel, used to control the display panel according to any one of claims 1-15, characterized in that, include; Acquire luminance distribution data of the light-emitting element from various viewing angles; A voltage control signal is generated based on the brightness difference from various viewing angles to adjust the size of the light-shielding area and the light-transmitting opening of the electrochromic structure; along the thickness direction of the display panel, the light-transmitting opening overlaps with the light-emitting surface of the light-emitting element, and the light-shielding area at least partially blocks the emitted light from the light-emitting element.

17. The control method according to claim 16, characterized in that, A voltage control signal is generated based on the luminance differences from various viewing angles to adjust the size of the light-blocking area and the light-transmitting opening of the electrochromic structure, including: Along the first direction, the luminance of the light-emitting element at the first viewing angle and the luminance at the second viewing angle are obtained; When the brightness difference between the first viewpoint and the second viewpoint exceeds the first threshold, the driving voltage of the shading unit corresponding to the first viewpoint region is controlled to be greater than the driving voltage of the shading unit corresponding to the second viewpoint region. The first viewpoint and the second viewpoint are symmetrical about the normal to the center of the light-emitting surface of the light-emitting element.

18. The control method according to claim 16, characterized in that, A voltage control signal is generated based on the luminance differences from various viewing angles to adjust the size of the light-blocking area and the light-transmitting opening of the electrochromic structure, including: Obtain the luminance of light-emitting elements of different colors from the same viewing angle; When the luminance difference between any two viewing angles exceeds the second threshold, the driving voltage of the shading unit corresponding to the high-luminance light-emitting element is controlled to be greater than the driving voltage of the shading unit corresponding to the low-luminance light-emitting element.

19. The control method according to claim 16, characterized in that, Before acquiring the luminance distribution data of the light-emitting element at various viewing angles, the following steps are also included: Acquire and store the relationship between the driving voltage of the electrochromic structure and the size of the shading area and the light-transmitting opening.

20. A display device, characterized in that, Includes the display panel as described in any one of claims 1-15.

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