LED display panel and spliced display device

Abstract

Embodiments of the present application disclose an LED display panel and a spliced display device. The LED display panel is used for splicing with a liquid crystal display panel. The LED display panel and the liquid crystal display panel have a splicing boundary. The LED display panel comprises a substrate and a plurality of first pixel units. The first pixel units are arranged on the substrate. The first pixel units comprise a plurality of light emitting devices. The light emitting devices comprise red light emitting devices, green light emitting devices, blue light emitting devices and compensation light emitting devices. The compensation light emitting devices are used for adjusting a color gamut. The light emitting colors of any two light emitting devices among the red light emitting devices, the green light emitting devices, the blue light emitting devices and the compensation light emitting devices are different. In the extension direction of the edge of the substrate close to the splicing boundary, the light emitting colors of adjacent two light emitting devices are different. The technical problems of color gamut difference and color edge when the liquid crystal display panel and the LED display panel are spliced can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and in particular to an LED display panel and a spliced display device. BACKGROUND

[0002] With the continuous development of display technology, the application occasions of display are more and more extensive, not only for television, monitor, industrial display, medical display, but also more and more applied to outdoor display. With the rapid development of outdoor display market, large size and high resolution have become the development direction of outdoor display.

[0003] The traditional liquid crystal display (LCD) has the advantages of low cost and high resolution, so the liquid crystal display can be applied to outdoor display, and specifically a plurality of liquid crystal display panels can be spliced together to realize large-screen display. However, when a plurality of liquid crystal display panels are spliced together, a joint gap will be generated between the adjacent two liquid crystal display panels, which affects the visual effect.

[0004] In order to eliminate the joint gap, an LED display panel can be arranged between the joint gap between the adjacent two liquid crystal display panels. However, in the research and practice process of the prior art, the inventors of the present application found that due to the color gamut difference between the liquid crystal display panel and the LED display panel, there will be display difference at the joint between the liquid crystal display panel and the LED display panel, especially for myopic people, myopic people are easy to see the color edge of the joint. SUMMARY

[0005] The embodiments of the present application provide an LED display panel and a spliced display device, which can solve the technical problems of color gamut difference and color edge when the liquid crystal display panel and the LED display panel are spliced.

[0006] The embodiments of the present application provide an LED display panel for splicing with a liquid crystal display panel, the LED display panel and the liquid crystal display panel have a splicing boundary, and the LED display panel comprises:

[0007] a substrate;

[0008] a plurality of first pixel units arranged on the substrate, the first pixel units comprising a plurality of light emitting devices, the plurality of light emitting devices comprising red light emitting devices, green light emitting devices, blue light emitting devices and compensation light emitting devices, the compensation light emitting devices being used for adjusting color gamut, and the light emitting colors of any two of the red light emitting devices, the green light emitting devices, the blue light emitting devices and the compensation light emitting devices being different;

[0009] The light-emitting devices of two adjacent ones of the plurality of light-emitting devices have different light-emitting colors along an extension direction of an edge of the substrate close to the splicing boundary.

[0010] Optionally, in some embodiments of the present application, the plurality of light-emitting devices are arranged in an array, light-emitting colors of two adjacent ones of the light-emitting devices along a row direction are different, and light-emitting colors of two adjacent ones of the light-emitting devices along a column direction are different.

[0011] Optionally, in some embodiments of the present application, the color of the light emitted by the compensation light-emitting device includes at least one of purple, cyan and yellow.

[0012] Optionally, in some embodiments of the present application, the compensation light-emitting device includes a purple light-emitting device and a yellow light-emitting device.

[0013] Optionally, in some embodiments of the present application, the red light-emitting device emits red light, and the red light has a wavelength range of 622 nm to 760 nm.

[0014] The green light-emitting device emits green light, and the green light has a wavelength range of 492 nm to 577 nm.

[0015] The blue light-emitting device emits blue light, and the blue light has a wavelength range of 435 nm to 475 nm.

[0016] The purple light-emitting device emits purple light, and the purple light has a wavelength range of 380 nm to 420 nm.

[0017] The yellow light-emitting device emits yellow light, and the yellow light has a wavelength range of 570 nm to 585 nm.

[0018] Optionally, in some embodiments of the present application, in the first pixel unit, the yellow light-emitting device is arranged at one side of the red light-emitting device, the green light-emitting device is arranged at a side of the yellow light-emitting device away from the red light-emitting device, the blue light-emitting device is arranged at a side of the green light-emitting device away from the yellow light-emitting device, and the purple light-emitting device is arranged at a side of the blue light-emitting device away from the green light-emitting device.

[0019] Optionally, in some embodiments of the present application, the compensation light-emitting device further includes a cyan light-emitting device.

[0020] Optionally, in some embodiments of the present application, the cyan light-emitting device emits cyan light, and the cyan light has a wavelength range of 485 nm to 500 nm.

[0021] Optionally, in some embodiments of the present application, the light emitting color of the light emitting device in the mth column of the nth row is the same as the light emitting color of the light emitting device in the m+1th column of the n+1th row, where n and m are positive integers, n is less than the total number of rows of the light emitting device, and m is less than the total number of columns of the light emitting device.

[0022] The present application also provides a spliced display device, comprising:

[0023] a liquid crystal display panel; and

[0024] The LED display panel as described above is spliced with the liquid crystal display panel, and the LED display panel and the liquid crystal display panel have a splicing boundary therebetween.

[0025] The present application adopts an LED display panel and a spliced display device, by making the first pixel unit include a red light emitting device, a green light emitting device, a blue light emitting device, and a compensation light emitting device, and the light emitting colors of any two light emitting devices among the red light emitting device, the green light emitting device, the blue light emitting device, and the compensation light emitting device are different, compared with a traditional LED display panel, under the condition of the same number of light emitting devices, the present application can reduce the color gamut of the LED display panel due to the increase of the light emitting device of the color other than red, green, and blue, so that the LED display panel approaches the color gamut of the liquid crystal display panel, effectively solving the technical problem of color gamut difference when splicing the liquid crystal display panel and the LED display panel; in addition, the light emitting colors of the adjacent two light emitting devices are different in the extension direction of the edge of the substrate close to the splicing boundary, and the edge of the substrate is the edge spliced with the liquid crystal display panel, by the above setting, the color edge situation can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a structural schematic diagram of an existing LED display panel;

[0028] Figure 2 is a spectrum comparison diagram of an existing LED display panel and a liquid crystal display panel;

[0029] Figure 3 is an optical principle diagram of an existing spliced display device;

[0030] Figure 4is a structural schematic diagram of a first LED display panel provided by an embodiment of the present application;

[0031] Figure 5 is a structural schematic diagram of a second LED display panel provided by an embodiment of the present application;

[0032] Figure 6 is a structural schematic diagram of a spliced display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementations described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing in the drawings; and "inner" and "outer" refer to the outline of the device.

[0034] The embodiments of the present application provide an LED display panel and a spliced display device. The following will be described in detail respectively. It should be noted that the description order of the following embodiments is not used to limit the preferred order of the embodiments.

[0035] Please refer to Figure 1 In the existing LED display panel 1, the pixel unit 11 includes a red LED chip 12, a green LED chip 13 and a blue LED chip 14. The colors of the LED chips in the LED display panel 1 along the extension direction in the column direction are the same, and therefore, the colors of the LED chips at the edge of the LED display panel 1 along the column direction are the same. In combination with Figure 2 , the color gamut of the LED display panel 1 is obviously higher than that of the liquid crystal display panel 2, and therefore, there will be display difference at the splicing position between the liquid crystal display panel 2 and the LED display panel 1. Specifically, there will be obvious color difference and brightness difference at the splicing position between the liquid crystal display panel 2 and the LED display panel 1, so that the LED display panel 1 has colored edges at the splicing position. As Figure 3As shown, for the general public, it is not easy to see the color edge of the LED display panel 1. For myopic people, when the light emitted by the LED display panel 1 enters the user's eyes through the optical axis of the myopic lens 3, the user will not see the color edge; when the light emitted by the LED display panel 1 enters the user's eyes through the upper or lower of the myopic lens 3, the user will see the color edge. In the embodiment of the present application, the colors of the LED chips of the edge of the LED display panel 1 along the column direction are red and blue, so the color edge is specifically a red edge and a blue edge. Of course, when the colors of the LED chips of the edge of the LED display panel 1 along the column direction are green, the color edge seen by myopic people can also be green.

[0036] In order to avoid the above problems, as shown in Figure 4 and Figure 6 The LED display panel 100 provided in the embodiment of the present application is used for splicing with the liquid crystal display panel 200, and the LED display panel 100 and the liquid crystal display panel 200 have a splicing boundary 300. The LED display panel 100 includes a substrate 110, and the substrate 110 is provided with a plurality of first pixel units 120. The first pixel unit 120 includes a plurality of light emitting devices 130, and the plurality of light emitting devices 130 include a red light emitting device 131, a green light emitting device 132, a blue light emitting device 133, and a compensation light emitting device 134. The compensation light emitting device 134 is used for adjusting the color gamut, and the light emitting colors of any two light emitting devices 130 of the red light emitting device 131, the green light emitting device 132, the blue light emitting device 133, and the compensation light emitting device 134 are different. Wherein, along the extension direction of the edge of the substrate 110 close to the splicing boundary 300, the light emitting colors of the adjacent two light emitting devices 130 are different.

[0037] It should be noted that the red light emitting device 131 refers to a light emitting device 130 that emits red light, and similarly, the green light emitting device 132 refers to a light emitting device 130 that emits green light, and the blue light emitting device 133 refers to a light emitting device 130 that emits blue light.

[0038] Specifically, in the LED display panel 100 of the embodiment of the present application, the light emitting device 130 can be specifically a Mini Light-Emitting Diode (Mini LED) or a Micro Light-Emitting Diode (Micro LED), of course, according to the actual situation and specific demand setting, the light emitting device 130 can also be other light emitting elements, which is not limited here.

[0039] The LED display panel 100 of the embodiment of the present application, by comprising the red light emitting device 131, the green light emitting device 132, the blue light emitting device 133 and the compensation light emitting device 134 in the first pixel unit 120, and the light emitting colors of any two light emitting devices 130 are different, compared with the traditional LED display panel 100, under the condition of the same number of light emitting devices 130, the present application can reduce the color gamut of the LED display panel 100 due to the increase of the light emitting device 130 of the color other than red, green and blue, so that the LED display panel 100 approaches the color gamut of the liquid crystal display panel 200, effectively solving the technical problem of color gamut difference when the liquid crystal display panel 200 and the LED display panel 100 are spliced; in addition, the light emitting colors of the adjacent two light emitting devices 130 in the extension direction of the edge of the substrate 110 close to the splicing boundary 300 are different, that is, the light emitting colors of the light emitting devices 130 on the edge are not pure red, pure blue or pure green, through the above setting, the color edge situation can be effectively avoided.

[0040] Specifically, the plurality of light emitting devices 130 are arranged in an array, specifically, the plurality of light emitting devices 130 are arranged in a plurality of rows and a plurality of columns. Among them, the light emitting colors of the adjacent two light emitting devices 130 in the row direction X are different, and the light emitting colors of the adjacent two light emitting devices 130 in the column direction Y are different. Under this structure, the LED display panel 100 can emit light uniformly, and in the extension direction of any edge of the LED display panel 100, the light emitting colors of the adjacent two light emitting devices 130 are different, which can effectively avoid the color edge situation.

[0041] Specifically, the red light emitting device 131 emits red light, the wavelength range of the red light is 622 nanometers to 760 nanometers, the green light emitting device 132 emits green light, the wavelength range of the green light is 492 nanometers to 577 nanometers, and the blue light emitting device 133 emits blue light, the wavelength range of the blue light is 435 nanometers to 475 nanometers.

[0042] Specifically, the color of the light emitted by the compensation light emitting device 134 includes at least one of purple, cyan and yellow, that is, the color of the light emitted by the compensation light emitting device 134 can be purple, cyan, yellow, a combination of purple and yellow, a combination of purple and cyan, a combination of cyan and yellow, and a combination of purple, cyan and yellow, thereby reducing the color gamut of the LED display panel 100.

[0043] It should be noted that when the color type of the light emitted by the compensation light emitting device 134 is two, then the compensation light emitting device 134 includes two, one of which is used to emit light of the first color, and the other is used to emit light of the second color; similarly, when the color type of the light emitted by the compensation light emitting device 134 is three, then the compensation light emitting device 134 includes three, one of which is used to emit light of the first color, the second is used to emit light of the second color, and the third is used to emit light of the third color.

[0044] Specifically, as shown in Figure 4 The compensation light emitting device 134 includes a purple light emitting device 1341 and a yellow light emitting device 1342. Under this structure, by increasing the purple light emitting device 1341 and the yellow light emitting device 1342, the color gamut of the LED display panel 100 can be reduced, so that the LED display panel 100 approaches the color gamut of the liquid crystal display panel 200, effectively solving the technical problem of color gamut difference when the liquid crystal display panel 200 and the LED display panel 100 are spliced.

[0045] Specifically, the purple light emitting device 1341 emits purple light, and the wavelength range of the purple light is 380-420 nm. The yellow light emitting device 1342 emits yellow light, and the wavelength range of the yellow light is 570-585 nm. Under this structure, the wavelength range of the purple light is different from the wavelength range of one of red light, green light and blue light, and the wavelength range of the yellow light is different from the wavelength range of one of red light, green light and blue light, which can effectively reduce the color gamut of the LED display panel 100. It should be noted that the above wavelength range refers to the difference in peak wavelength of the two types of light.

[0046] Specifically, as shown in Figure 4 In the first pixel unit 120, the yellow light emitting device 1342 is arranged on one side of the red light emitting device 131, the green light emitting device 132 is arranged on the side of the yellow light emitting device 1342 away from the red light emitting device 131, the blue light emitting device 133 is arranged on the side of the green light emitting device 132 away from the yellow light emitting device 1342, and the purple light emitting device 1341 is arranged on the side of the blue light emitting device 133 away from the green light emitting device 132. Under this structure, the arrangement of the plurality of light emitting devices 130 in the first pixel unit 120 is sequentially arranged according to the distribution of the wavelength range, which is conducive to reducing the color gamut of the LED display panel 100, and also facilitates the adjustment of the light emitting color of the red light emitting device 131, the green light emitting device 132 and the blue light emitting device 133.

[0047] Specifically, when at least one of the red light emitting device 131 and the green light emitting device 132 emits light, the yellow light emitting device 1342 also emits light, so that the light emitting color of the red light emitting device 131 and the green light emitting device 132 is closer to the light emitting color of the red sub-pixel and the green sub-pixel of the liquid crystal display panel 200; when the blue light emitting device 133 emits light, the purple light emitting device 1341 also emits light, so that the light emitting color of the blue light emitting device 133 is closer to the light emitting color of the blue sub-pixel of the liquid crystal display panel 200. In this embodiment, the brightness of each light emitting device 130 can be adjusted according to the current size.

[0048] Specifically, as shown in FIG. 1, the compensation light emitting device 134 further includes a yellow light emitting device 1342. In this structure, by adding the yellow light emitting device 1342, the color gamut of the LED display panel 100 can be further reduced, so that the LED display panel 100 approaches the color gamut of the liquid crystal display panel 200, effectively solving the technical problem of color gamut difference when the liquid crystal display panel 200 and the LED display panel 100 are spliced. Figure 5

[0049] Specifically, the yellow light emitting device 1342 emits yellow light, and the wavelength range of the yellow light is 570 nanometers to 590 nanometers. In this structure, the wavelength ranges of the red light, the green light, the blue light, the purple light, the yellow light and the cyan light are all different, which can well reduce the color gamut of the LED display panel 100.

[0050] Specifically, as shown in FIG. 1, the compensation light emitting device 134 further includes a yellow light emitting device 1342. In this structure, by adding the yellow light emitting device 1342, the color gamut of the LED display panel 100 can be further reduced, so that the LED display panel 100 approaches the color gamut of the liquid crystal display panel 200, effectively solving the technical problem of color gamut difference when the liquid crystal display panel 200 and the LED display panel 100 are spliced. Figure 5

[0051] ​​Specifically, when the red light-emitting device 131 emits light, the yellow light-emitting device 1342 also emits light, making the emitted light color of the red light-emitting device 131 closer to the emitted light color of the red sub-pixel of the liquid crystal display panel 200; when the green light-emitting device 132 emits light, at least one of the yellow light-emitting device 1342 and the cyan light-emitting device 1343 also emits light, making the emitted light color of the green light-emitting device 132 closer to the emitted light color of the green sub-pixel of the liquid crystal display panel 200; when the blue light-emitting device 133 emits light, at least one of the purple light-emitting device 1341 and the cyan light-emitting device 1343 also emits light, making the emitted light color of the blue light-emitting device 133 closer to the emitted light color of the blue sub-pixel of the liquid crystal display panel 200. In this embodiment, the brightness of each light-emitting device 130 can be adjusted according to the current magnitude.

[0052] Specifically, such as Figure 4 and Figure 5 As shown, the light-emitting device 130 in the nth row and mth column emits the same color as the light-emitting device 130 in the (n+1)th row and m+1th column, where n and m are positive integers, and n is less than the total number of rows of light-emitting devices 130, and m is less than the total number of columns of light-emitting devices 130. This structure ensures that the LED display panel 100 emits light uniformly, and that adjacent light-emitting devices 130 emit different colors along the extension direction of any edge of the LED display panel 100, effectively avoiding the occurrence of colored edges.

[0053] Specifically, in this embodiment, the pixel pitch of the first pixel unit 120 is 0.1 mm to 1.5 mm. For example, the pixel pitch of the first pixel unit 120 can be 0.1 mm, 0.5 mm, 1.28 mm, or 1.5 mm. This structure effectively improves the graininess problem of the LED display panel 100, resulting in a smooth image transition at the junction of the LED display panel 100 and the liquid crystal display panel 200.

[0054] Specifically, in this embodiment, the spacing between two adjacent light-emitting devices 130 in the first pixel unit 120 is 30 micrometers to 50 micrometers. For example, the spacing between two adjacent light-emitting devices 130 in the first pixel unit 120 can be 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, or 50 micrometers. This structure effectively improves the graininess problem of the LED display panel 100, resulting in a smooth image transition at the junction of the LED display panel 100 and the liquid crystal display panel 200.

[0055] Please see Figure 6The embodiment of the present application also provides a spliced display device, comprising a liquid crystal display panel 200 and the LED display panel 100 as described above, the LED display panel 100 is spliced with the liquid crystal display panel 200, the LED display panel 100 and the liquid crystal display panel 200 have a splicing boundary 300, and the light-emitting colors of two adjacent light-emitting devices 130 are different along the extension direction of the edge of the substrate 110 spliced with the liquid crystal display panel 200.

[0056] Specifically, the liquid crystal display panel 200 comprises a plurality of second pixel units 210, and the pixel pitch of the second pixel units 210 is 0.1-1.5 mm, for example, the pixel pitch of the second pixel units 210 can be 0.1 mm, 0.43 mm, 0.63 mm or 1.5 mm. Under the structure, the pixel pitch of the first pixel units 120 is close to the pixel pitch of the second pixel units 210, so that the image at the splicing position of the LED display panel 100 and the liquid crystal display panel 200 is smoothly transitioned.

[0057] Specifically, the liquid crystal display panel 200 comprises a plurality of second pixel units 210, and the difference between the pixel pitch of the first pixel units 120 and the pixel pitch of the second pixel units 210 is less than 1 mm.

[0058] The above describes in detail the LED display panel and the spliced display device provided by the embodiment of the present application, the principle and the implementation mode of the present application are described by applying specific examples in the text, and the above embodiment is only used for helping to understand the method and the core idea of the present application; meanwhile, according to the idea of the present application, the specific implementation mode and the application range will be changed by the person skilled in the art, and the above description should not be understood as the limitation of the present application.

Claims

1. An LED display panel for tiling with a liquid crystal display panel, the LED display panel and the liquid crystal display panel having a tiling boundary therebetween, characterized in that, The LED display panel comprises: a substrate; a plurality of first pixel units arranged on the substrate, the first pixel units comprising a plurality of light emitting devices, the plurality of light emitting devices comprising a red light emitting device, a green light emitting device, a blue light emitting device, and a compensation light emitting device, the compensation light emitting device being configured to reduce a color gamut, and the red light emitting device, the green light emitting device, the blue light emitting device, and the compensation light emitting device being different in light emitting color; wherein, along an extension direction of an edge of the substrate close to the splicing boundary, the light emitting colors of two adjacent light emitting devices are different; the compensation light emitting device comprises a yellow light emitting device and a purple light emitting device, in the first pixel unit, the yellow light emitting device is arranged on one side of the red light emitting device, the green light emitting device is arranged on a side of the yellow light emitting device away from the red light emitting device, the blue light emitting device is arranged on a side of the green light emitting device away from the yellow light emitting device, and the purple light emitting device is arranged on a side of the blue light emitting device away from the green light emitting device; when the red light emitting device emits light, the yellow light emitting device also emits light; when the green light emitting device emits light, the yellow light emitting device also emits light; and when the blue light emitting device emits light, the purple light emitting device also emits light.

2. The LED display panel of claim 1, wherein, The plurality of light emitting devices are arranged in an array, the light emitting colors of two adjacent light emitting devices in a row direction are different, and the light emitting colors of two adjacent light emitting devices in a column direction are different.

3. The LED display panel of claim 1, wherein, The red light emitting device emits red light, and the wavelength range of the red light is 622-760 nm; The green light emitting device emits green light, and the wavelength range of the green light is 492-577 nm; The blue light emitting device emits blue light, and the wavelength range of the blue light is 435-475 nm; The purple light emitting device emits purple light, and the wavelength range of the purple light is 380-420 nm; The yellow light emitting device emits yellow light, and the wavelength range of the yellow light is 570-585 nm.

4. The LED display panel of claim 1, wherein, The compensation light emitting device further comprises a cyan light emitting device, the cyan light emitting device is arranged on a side of the green light emitting device away from the yellow light emitting device, and the blue light emitting device is arranged on a side of the cyan light emitting device away from the green light emitting device; when the green light emitting device emits light, the yellow light emitting device and the cyan light emitting device also emit light; when the blue light emitting device emits light, the purple light emitting device and the cyan light emitting device also emit light.

5. The LED display panel of claim 4, wherein, The cyan light emitting device emits cyan light, and the wavelength range of the cyan light is 485-500 nm.

6. The LED display panel of claim 2, wherein, The light emitting color of the light emitting device in the mth column of the nth row is the same as the light emitting color of the light emitting device in the m+1th column of the n+1th row, where n and m are positive integers, n is less than the total number of rows of the light emitting devices, and m is less than the total number of columns of the light emitting devices.

7. A tiled display apparatus, characterized by comprise: a liquid crystal display panel; and ​ The LED display panel of any one of claims 1-6, the LED display panel is spliced with the liquid crystal display panel, and a splicing boundary is formed between the LED display panel and the liquid crystal display panel.

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