Display module, display panel and electronic equipment

Abstract

The invention provides a display module, a display panel and electronic equipment, and relates to the technical field of display panels, and the display module comprises a plurality of light-emitting sub-pixels arranged in an array; each light-emitting sub-pixel comprises at least two light-emitting devices which have the same color and are driven by the same pixel driving circuit; and the average wavelengths of the at least two light-emitting sub-pixels with the same light-emitting color are equal. The light color uniformity of the display screen body can be improved while the light color Bin gear utilization rate of the light-emitting device is improved and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of display panel technology, and more specifically, to a display module, a display panel, and an electronic device. Background Technology

[0002] With the development of display device manufacturing technology, Mini LEDs and Micro-LEDs are widely used due to their superior advantages in brightness, resolution, contrast, energy consumption, lifespan, response speed and thermal stability.

[0003] However, the display performance of Mini LED or Micro-LED display panels currently needs improvement. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings in the prior art, the purpose of this application is to provide a display module, the display module comprising a plurality of light-emitting sub-pixels arranged in an array;

[0005] Each of the light-emitting sub-pixels includes at least two light-emitting devices with the same light-emitting color and driven by the same pixel driving circuit;

[0006] At least two of the light-emitting sub-pixels with the same emission color have the same average wavelength.

[0007] In one possible implementation, at least two of the light-emitting devices in each of the light-emitting sub-pixels are connected in series.

[0008] In one possible implementation, each of the light-emitting sub-pixels comprises two light-emitting devices connected in series.

[0009] In one possible implementation, the difference between the wavelengths of at least two of the light-emitting devices in the light-emitting sub-pixel and the average wavelength of the light-emitting sub-pixel is less than or equal to 5 nanometers.

[0010] In one possible implementation, at least two of the light-emitting devices in the same light-emitting sub-pixel have different wavelengths.

[0011] In one possible implementation, the number of light-emitting devices in the different light-emitting sub-pixels is the same.

[0012] In one possible implementation, the light-emitting sub-pixels include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels.

[0013] In one possible implementation, the average wavelength of the red emitting sub-pixel is 635 nanometers, the average wavelength of the green emitting sub-pixel is 545 nanometers, and the average wavelength of the blue emitting sub-pixel is 465 nanometers.

[0014] Another objective of this application is to provide a display panel, which includes the display module provided in this application.

[0015] Another object of this application is to provide an electronic device, which includes the display panel provided in this application.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] This application provides a display module, display panel, and electronic device. By arranging at least two light-emitting devices in the light-emitting sub-pixels and making the average wavelengths of the at least two light-emitting sub-pixels with the same light-emitting color equal, the utilization rate of the light color bin of the light-emitting devices can be improved, and the cost can be reduced, while improving the light color uniformity of the display screen.

[0018] In addition, by connecting at least two light-emitting devices in the light-emitting sub-pixel in series, the current can be reduced under the same brightness conditions, thereby reducing power consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a display module in the prior art;

[0021] Figure 2 This is one of the structural schematic diagrams of the display module provided in the embodiments of this application;

[0022] Figure 3 This is a second schematic diagram of the structure of the display module provided in the embodiments of this application;

[0023] Figure 4 A cross-sectional schematic diagram of a light-emitting sub-pixel provided in an embodiment of this application;

[0024] Figure 5 This is one of the structural schematic diagrams of the light-emitting sub-pixel provided in the embodiments of this application;

[0025] Figure 6 This is the second schematic diagram of the structure of the light-emitting sub-pixel provided in the embodiments of this application;

[0026] Figure 7 This is a schematic diagram illustrating the deviation effect of color coordinates provided in the embodiments of this application.

[0027] Icons: 100 - Display module; 110 - Light-emitting sub-pixel; 111 - Light-emitting device. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0033] The inventor discovered through research that... (Please refer to...) Figure 1Currently, each light-emitting sub-pixel 110' in a display panel includes only one light-emitting device 111', and the color bin of each light-emitting device 111' is different (light-emitting diodes are classified according to different photoelectric characteristics, with each category representing a bin level). For light-emitting sub-pixels 110' of the same color, light-emitting devices 111' with wavelength differences within 5 nanometers are usually uniformly mixed, and then die-bonded individually as pixels before encapsulation. For example, for green light-emitting sub-pixels, green light-emitting devices with wavelengths of 543-547 nanometers can be selected. However, this method results in poor uniformity of color and brightness in the display screen, and using only a single light-emitting device 111' as a pixel leads to problems such as low luminous efficiency and high power consumption of the screen.

[0034] In view of this, this embodiment provides a solution that can solve the above problems. The solution provided in this embodiment will be described in detail below.

[0035] Please refer to Figure 2 , Figure 2 Example: A schematic diagram of the structure of the display module 100 provided in this embodiment. The display module 100 may include a plurality of light-emitting sub-pixels 110 arranged in an array.

[0036] The multiple light-emitting sub-pixels 110 may include light-emitting sub-pixels 110 of various colors, and the number of light-emitting sub-pixels 110 of each color is certain to ensure that the displayed image does not have color distortion. The multiple light-emitting sub-pixels 110 of various colors may include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels, that is, the multiple light-emitting sub-pixels 110 may include at least one red light-emitting sub-pixel, at least one green light-emitting sub-pixel, and at least one blue light-emitting sub-pixel. Among them, a red light-emitting sub-pixel refers to a light-emitting sub-pixel 110 that can emit red light, a green light-emitting sub-pixel refers to a light-emitting sub-pixel 110 that can emit green light, and a blue light-emitting sub-pixel refers to a light-emitting sub-pixel 110 that can emit blue light.

[0037] Each light-emitting sub-pixel 110 may include at least two light-emitting devices 111 with the same emission color and driven by the same pixel driving circuit. That is, in this embodiment, the light-emitting devices 111 included in the same light-emitting sub-pixel 110 are always driven to emit light simultaneously.

[0038] The light-emitting device 111 can be a Micro LED chip, a Mini-LED chip, an organic light-emitting diode (OLED), or other organic light-emitting devices (EL). In this embodiment, the size of the light-emitting device 111 is not specifically limited.

[0039] For example, if the light-emitting device 111 provided in this embodiment is a Micro LED chip or a Mini-LED chip, the display module 100 provided in this embodiment may also include a driving backplate. The driving backplate is provided with a plurality of pixel driving circuits. A bonding electrode connected to the pixel driving circuit may be provided on one side of the driving backplate. A plurality of pre-made light-emitting devices 111 may be transferred to one side of the driving backplate and contacted with the bonding electrode by mass transfer process. The light-emitting devices 111 may be electrically connected to the pixel driving circuit in the driving backplate through the bonding electrode by means of soldering or bonding.

[0040] The pixel driving circuit may include a first terminal and a second terminal. The first terminal of the pixel driving circuit may be connected to at least two light-emitting devices 111 in the light-emitting sub-pixel 110, and the second terminal of the pixel driving circuit may be connected to a voltage source providing VDD. The pixel driving circuit can be used to drive the light-emitting devices 111 to emit light. Each light-emitting sub-pixel 110 may include two or more light-emitting devices 111, and at least two light-emitting devices 111 in the same light-emitting sub-pixel 110 may be arranged in a line. The at least two light-emitting devices 111 in the same light-emitting sub-pixel 110 emit the same color and are also the same size. For example, the light-emitting colors of at least two light-emitting devices 111 in the same light-emitting sub-pixel 110 may both be red, green, or blue.

[0041] It should be noted that, Figure 2 The diagram only shows the case where each light-emitting sub-pixel 110 includes two light-emitting devices 111. However, in practical applications, please refer to [the diagram]. Figure 3 Each light-emitting sub-pixel 110 can also be composed of more light-emitting devices 111, such as four light-emitting devices 111. Multiple light-emitting devices 111 in the same light-emitting sub-pixel 110 can be arranged adjacent to each other, and the arrangement of multiple light-emitting devices 111 in the same light-emitting sub-pixel 110 is not specifically limited in this embodiment.

[0042] At least two luminous sub-pixels 110 with the same luminous color have the same average wavelength.

[0043] The emission color of the light-emitting sub-pixel 110 corresponds to the emission color of the light-emitting device 111 in the light-emitting sub-pixel 110. For example, when the emission color of the light-emitting device 111 in the light-emitting sub-pixel 110 is all red, it corresponds to a red light-emitting sub-pixel; when the emission color of the light-emitting device 111 in the light-emitting sub-pixel 110 is all green, it corresponds to a green light-emitting sub-pixel; when the emission color of the light-emitting device 111 in the light-emitting sub-pixel 110 is all blue, it corresponds to a blue light-emitting sub-pixel.

[0044] For light-emitting sub-pixels 110 with the same emission color, the average wavelength of their corresponding light-emitting devices 111 is equal. For example, the average wavelength of at least two light-emitting devices 111 in a red light-emitting sub-pixel can be equal to the average wavelength of at least two light-emitting devices 111 in other red light-emitting sub-pixels, the average wavelength of at least two light-emitting devices 111 in a green light-emitting sub-pixel can be equal to the average wavelength of at least two light-emitting devices 111 in other green light-emitting sub-pixels, and the average wavelength of at least two light-emitting devices 111 in a blue light-emitting sub-pixel can be equal to the average wavelength of at least two light-emitting devices 111 in other blue light-emitting sub-pixels.

[0045] Based on the above design, in the display module 100 provided in this embodiment, by setting at least two light-emitting devices 111 that are driven to emit light simultaneously in the light-emitting sub-pixels 110, and making the average wavelengths of the at least two light-emitting sub-pixels 110 with the same emitting color equal, the light color bin utilization rate of the light-emitting devices 111 can be improved and the cost reduced, while improving the light color uniformity of the display screen.

[0046] In one possible implementation, at least two light-emitting devices 111 in each light-emitting sub-pixel 110 are connected in series.

[0047] In this embodiment, please refer to Figure 4 A red light-emitting sub-pixel can be formed by connecting at least two red light-emitting devices in series, a green light-emitting sub-pixel can be formed by connecting at least two green light-emitting devices in series, and a blue light-emitting sub-pixel can be formed by connecting at least two blue light-emitting devices in series. Connecting the light-emitting devices 111 in series means electrically connecting the cathode of one light-emitting device 111 to the anode of another light-emitting device 111. The cathodes of the interconnected light-emitting devices 111 can be electrically connected to a voltage source providing VSS, and the anodes of the interconnected light-emitting devices 111 can be electrically connected to a pixel driving circuit.

[0048] In some examples, please refer to Figure 5 Each light-emitting sub-pixel 110 may include three light-emitting devices 111 connected in series. The cathode of the first light-emitting device D1 may be connected to the anode of the second light-emitting device D2, the cathode of the second light-emitting device D2 may be connected to the anode of the third light-emitting device D3, the anode of the first light-emitting device D1 may be connected to the pixel driving circuit, and the cathode of the third light-emitting device D3 may be connected to a voltage source providing VSS.

[0049] In the above design, by connecting the light-emitting devices 111 in the light-emitting sub-pixel 110 in series, the light efficiency can be effectively improved, and the current can be reduced under the same brightness conditions, thereby reducing power consumption.

[0050] In other implementations, at least two light-emitting devices 111 in the light-emitting sub-pixel 110 can also be connected in parallel and connected to the same pixel driving circuit respectively.

[0051] In one possible implementation, each light-emitting subpixel 110 may include two light-emitting devices 111 connected in series.

[0052] In this embodiment, please refer to Figure 6 The light-emitting sub-pixel 110 may include a first light-emitting device D1 and a second light-emitting device D2 connected in series. The cathode of the first light-emitting device D1 may be electrically connected to the anode of the second light-emitting device D2. The anode of the first light-emitting device D1 may be electrically connected to the pixel driving circuit. The cathode of the second light-emitting device D2 may be electrically connected to a voltage source providing VSS.

[0053] For a light-emitting sub-pixel 110 with the same emission color, the wavelengths of its two corresponding light-emitting devices 111 can be λ-m and λ+m, respectively, and the average wavelength of each light-emitting sub-pixel 110 is λ.

[0054] In some examples, if two green light-emitting devices with wavelengths of 550 nm and 540 nm are connected in series to form a light-emitting sub-pixel 110, the color coordinates of the corresponding new color can be obtained through color matching logic: x = 0.267, y = 0.721. Specifically, the color coordinates of the light-emitting device 111 with a wavelength of 550 nm are 0.266 and y = 0.724; the color coordinates of the light-emitting device 111 with a wavelength of 540 nm are 0.230 and y = 0.754; and the color coordinates of the light-emitting device 111 with a wavelength of 545 nm are 0.266 and y = 0.724. Therefore, the color coordinate x of the group Bin color differs from the color coordinate x of the average wavelength by 0.001, and the color coordinate y of the group Bin color differs from the color coordinate y of the average wavelength by 0.003. This indicates that the color of the group Bin color is basically consistent with its average wavelength of 545 nm. Additionally, please refer to... Figure 7 , Figure 7 Example: A schematic diagram illustrating the effect of color coordinate deviation in this embodiment.

[0055] In one possible implementation, the difference between the wavelength of at least two light-emitting devices 111 in the light-emitting sub-pixel 110 and the average wavelength of the light-emitting sub-pixel 110 can be less than or equal to 5 nanometers.

[0056] In this embodiment, for light-emitting sub-pixels 110 of the same color, light-emitting devices 111 with a wavelength difference within 10 nanometers can be connected in series to form light-emitting sub-pixels 110.

[0057] In some examples, if the average wavelength of a green light-emitting subpixel is 545 nanometers, then each green light-emitting subpixel can be composed of a mixture of green light-emitting devices with wavelengths ranging from 540 nanometers to 550 nanometers. For example, when a green light-emitting subpixel is composed of two green light-emitting devices connected in series, the wavelengths of the two green light-emitting devices can be 541 nanometers and 549 nanometers, respectively.

[0058] In the above design, compared with the prior art which only selects light-emitting devices 111 with wavelength differences within 5 nanometers, this embodiment can increase the application range of light-emitting devices 111 from 5 nanometers to 10 nanometers. In this way, the utilization rate of the color bin of light-emitting devices 111 can be improved, thereby reducing costs.

[0059] In one possible implementation, at least two light-emitting devices 111 in the same light-emitting sub-pixel 110 may have different wavelengths.

[0060] In some examples, when there are two light-emitting devices 111 in the light-emitting sub-pixel 110, the wavelengths of the light-emitting devices 111 in one green light-emitting sub-pixel can be 540 nm and 550 nm respectively, and the wavelengths of the light-emitting devices 111 in the other green light-emitting sub-pixel can be 544 nm and 546 nm respectively, as long as the average wavelengths of the green light-emitting sub-pixels are equal.

[0061] In other examples, when the number of light-emitting devices 111 in the light-emitting sub-pixel 110 is four, the wavelengths of the light-emitting devices 111 in one green light-emitting sub-pixel can be 541 nm, 549 nm, 540 nm and 550 nm respectively, and the wavelengths of the light-emitting devices 111 in another green light-emitting sub-pixel can be 541 nm, 544 nm, 546 nm and 549 nm respectively, as long as the average wavelength of the green light-emitting sub-pixels is equal.

[0062] It should be noted that at least two light-emitting devices 111 in the same light-emitting sub-pixel 110 may also have the same wavelength (e.g., both 545 nanometers), which is equal to the average wavelength of the light-emitting sub-pixel 110.

[0063] In one possible implementation, the number of light-emitting devices 111 in different light-emitting sub-pixels 110 can be the same.

[0064] In this embodiment, in order to improve the uniformity of light color of the display screen, the number of light-emitting devices 111 in all light-emitting sub-pixels 110 can be the same. For example, the number of light-emitting devices 111 in the red light-emitting sub-pixel can be two, the number of light-emitting devices 111 in the green light-emitting sub-pixel can be two, and the number of light-emitting devices 111 in the blue light-emitting sub-pixel can be two.

[0065] In one possible implementation, the average wavelengths of the light-emitting sub-pixels 110 of different colors can be different. The average wavelength of the red light-emitting sub-pixels can include 635 nanometers, the average wavelength of the green light-emitting sub-pixels can include 545 nanometers, and the average wavelength of the blue light-emitting sub-pixels can include 465 nanometers.

[0066] In some examples, when each light-emitting sub-pixel 110 is composed of two light-emitting devices 111 connected in series, the wavelengths of the two red light-emitting devices in the red light-emitting sub-pixel can be 633 nm and 637 nm, respectively; the wavelengths of the two green light-emitting devices in the green light-emitting sub-pixel can be 542 nm and 548 nm, respectively; and the wavelengths of the two blue light-emitting devices in the blue light-emitting sub-pixel can be 464 nm and 466 nm, respectively.

[0067] It should be noted that in the red light-emitting sub-pixels, the number of light-emitting sub-pixels 110 with wavelengths of 633 nm and 637 nm respectively is not limited to one, and can be zero or more, without specific limitation here.

[0068] In the green light-emitting sub-pixels, the number of light-emitting sub-pixels 110 with wavelengths of 542 nm and 548 nm is not limited to one, but can be zero or more, and no specific limitation is made here.

[0069] In the blue light-emitting sub-pixels, the number of light-emitting sub-pixels 110 with wavelengths of 464 nm and 466 nm respectively can be not limited to one, but can be zero or more, without specific limitation here.

[0070] This application embodiment also provides a display panel, which may include the display module 100 provided in this embodiment.

[0071] This application also provides an electronic device, which may include the display panel described above. The electronic device may include devices with display functions such as monitors, video wall displays, mobile phones, tablets, laptops, and televisions.

[0072] In summary, the embodiments of this application provide a display module, a display panel, and an electronic device. By setting at least two light-emitting devices in the light-emitting sub-pixels and making the average wavelengths of the at least two light-emitting sub-pixels with the same light-emitting color equal, the utilization rate of the light color bin of the light-emitting devices can be improved, and the cost can be reduced, while improving the light color uniformity of the display screen.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A display module, characterized in that, The display module includes multiple light-emitting sub-pixels arranged in an array; Each of the light-emitting sub-pixels includes at least two light-emitting devices with the same light-emitting color and driven by the same pixel driving circuit; At least two of the light-emitting sub-pixels with the same emission color have the same average wavelength.

2. The display module according to claim 1, characterized in that, At least two of the light-emitting devices in each of the light-emitting sub-pixels are connected in series.

3. The display module according to claim 2, characterized in that, Each of the light-emitting sub-pixels comprises two light-emitting devices connected in series.

4. The display module according to claim 1, characterized in that, The wavelength difference between at least two of the light-emitting devices in the light-emitting sub-pixel and the average wavelength of the light-emitting sub-pixel is less than or equal to 5 nanometers.

5. The display module according to claim 1, characterized in that, At least two of the light-emitting devices in the same light-emitting sub-pixel have different wavelengths.

6. The display module according to claim 1, characterized in that, The number of light-emitting devices in the different light-emitting sub-pixels is the same.

7. The display module according to claim 1, characterized in that, The light-emitting sub-pixels include red light-emitting sub-pixels, green light-emitting sub-pixels, and blue light-emitting sub-pixels.

8. The display module according to claim 7, characterized in that, The average wavelength of the red light-emitting sub-pixel is 635 nanometers, the average wavelength of the green light-emitting sub-pixel is 545 nanometers, and the average wavelength of the blue light-emitting sub-pixel is 465 nanometers.

9. A display panel, characterized in that, Includes the display module as described in claims 1-8.

10. An electronic device, characterized in that, Includes the display panel as described in claim 9.

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