LED display screen

Abstract

The present invention discloses an LED display screen, wherein the LED display screen is formed by splicing a plurality of LED sub-display screens, the LED sub-display screens include a display back panel and LEDs arranged on the display back panel, there are splicing seams between the plurality of LED sub-display screens, wherein the horizontal height of the LEDs at the edge of the display back panel is lower than the horizontal height of the LEDs at the middle of the display back panel. In the present invention, since the horizontal height of the LEDs at the edge of the display back panel is lower than the horizontal height of the LEDs at the middle of the display back panel, the light intensity at the splicing seam is increased, and the light intensity of the weak light area formed on both sides of the splicing seam is weakened, so that the light intensity from the middle of the LED sub-display screen to the splicing seam is weakened in sequence, and the weakening degree is within the acceptable range for the naked eye, and will not cause obvious impact on the visual effect, thereby improving the shadow condition of the existing large-size LED display screen at the splicing seam and improving the display effect of the large-size LED display screen.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display screens, and in particular to an LED display screen. Background Art

[0002] LED display is a flat panel display, which is composed of small LED module panels. It is a device used to display various information such as text, images, videos, etc. LED display is an electronic display composed of LED dot matrix. It changes the screen display content form by turning on and off red and green light beads, such as text, animation, pictures, and videos in real time, and controls the component display through modular structure.

[0003] At present, large-size LED displays are usually composed of a certain number of small-size LED displays. However, due to manufacturing process limitations, such as Figure 1 As shown, the width of the joints between LED display screens is much larger than the pixel pitch, and dark shadows are likely to appear at the joints, affecting the display effect.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an LED display screen, aiming to solve the problem that existing large-size LED display screens are prone to dark shadows at the joints, resulting in poor display effects.

[0006] The technical solution of the present invention is as follows:

[0007] An LED display screen, wherein the LED display screen is spliced ​​together by a plurality of LED sub-display screens, wherein the LED sub-display screens include a display back panel and LEDs arranged on the display back panel, and there are splicing seams between the plurality of LED sub-display screens, wherein the horizontal height of the LEDs at the edge of the display back panel is lower than the horizontal height of the LEDs in the middle of the display back panel.

[0008] The LED display screen, wherein the display backplane comprises a substrate, a circuit layer and a planarization layer arranged in sequence from bottom to top; and the LED is arranged on the planarization layer.

[0009] In the LED display screen, the flattening layer of the display backplane is subjected to proofing processing, so that the horizontal height of the LEDs at the edge of the display backplane is lower than the horizontal height of the LEDs in the middle of the display backplane.

[0010] In the LED display screen, the LEDs at the edge of the display back panel and the LEDs at the middle of the display back panel are arranged on planes with different horizontal heights.

[0011] In the LED display screen, the height difference between the plane where the LEDs at the edge of the display backplane are located and the plane where the LEDs in the middle of the display backplane are located is equal to the width of the joint seam.

[0012] In the LED display screen, the edge of the planarization layer is arranged as an inclined surface; and the LEDs at the edge of the display backplane are arranged on the inclined surface.

[0013] In the LED display screen, the horizontal height difference between the two ends of the inclined surface is equal to the width of the joint.

[0014] In the LED display screen, the inclination angle of the inclined surface is 20°-70°.

[0015] The LED display screen, wherein the planarization layer is one or more of a polymer layer having a phenolic hydroxyl group, a polymer layer having an acrylic group, a polymer layer having an imide group, a polymer layer having an aromatic ether group, a polymer layer having an amide group, a polymer layer having a fluorine group, a polymer layer having a p-xylene group and a polymer layer having a vinyl alcohol group.

[0016] The LED display screen, wherein the substrate is one or more of a silicon dioxide substrate, a polyethersulfone substrate, a polyacrylate substrate, a polyetherimide substrate, a polyethylene terephthalate substrate, a polyphenylene sulfide substrate, a polyarylate substrate, a polyimide substrate, a polycarbonate substrate, a triacetate cellulose substrate and a cellulose propionate substrate.

[0017] Beneficial effect: The present invention provides an LED display screen, which performs a punching process on the flattening layer of the display back panel of the LED sub-display screen so that the horizontal plane where the LEDs at the edge of the display back panel are located is lower than the horizontal plane where the LEDs in the middle of the display back panel are located, so that the light at the joints is cross-focused, thereby improving the light intensity at the joints. At the same time, weak light areas are formed on both sides of the joints, and the light intensity from the middle of the LED sub-display screen to the joints is gradually weakened, and the degree of weakening is within the acceptable range for the naked eye, and will not cause obvious impact on the visual effect. The shadow condition of the existing large-size LED display screen at the joints is improved, and the display effect of the large-size LED display screen is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of light at the joints of a large-size LED screen in the prior art.

[0019] Figure 2 The present invention is a schematic structural diagram of a preferred embodiment of a display backplane of an LED sub-display screen in an LED display screen.

[0020] Figure 3 It is a structural schematic diagram of a preferred embodiment of the present invention in which the planarization layer on the display backplane is processed by sinking.

[0021] Figure 4 It is a structural schematic diagram of a preferred embodiment of the present invention in which the planarization layer on the display backplane is processed by oblique punching. DETAILED DESCRIPTION

[0022] The present invention provides an LED display screen. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Based on the fact that the existing large-size LED display screen is spliced ​​by multiple small-size LED display screens, the LED display screen in this article adopts micro LED, that is, mini-LED with a size less than 300 microns or micro-LED with a size less than 300 microns, and the splicing seams formed by splicing are prone to form shadows, affecting the display effect. In order to improve the display effect of the large-size LED display screen, this embodiment provides an LED display screen, wherein the LED display screen is spliced ​​by a plurality of LED sub-display screens, and the LED sub-display screens include a display backplane and LEDs arranged on the display backplane. There are splicing seams between the plurality of LED sub-display screens, and the horizontal height of the LEDs at the edge of the display backplane is lower than the horizontal height of the LEDs in the middle of the display backplane.

[0024] In this embodiment, the LED sub-display screen is the LED display screen in the prior art. Since the horizontal height of the LEDs at the edge of the display back panel is lower than the horizontal height of the LEDs in the middle of the display back panel, the light at the joint is cross-focused, thereby increasing the light intensity at the joint. At the same time, weak light areas are formed on both sides of the joint. The light intensity of the weak light areas is lower than the light intensity in the middle of the display back panel, so that the light intensity from the middle to the joint of the LED sub-display screen is gradually weakened, and the degree of weakening is within the acceptable range for the naked eye, and will not cause obvious impact on the visual effect. This improves the shadow condition of the existing large-size LED display screen at the joint, and improves the display effect of the large-size LED display screen.

[0025] Furthermore, the display backplane includes a substrate, a circuit layer and a planarization layer arranged in sequence from bottom to top; the LED is arranged on the planarization layer. Figure 2 As shown, Figure 2The present invention is a structural schematic diagram of a preferred embodiment of a display backplane of an LED sub-display screen in an LED display screen of the present invention, wherein the display backplane 1 includes a substrate 12, a circuit layer 11 and a planarization layer 10 arranged in sequence from bottom to top, the substrate is one or more of a silicon dioxide substrate, a polyethersulfone substrate, a polyacrylate substrate, a polyetherimide substrate, a polyethylene terephthalate substrate, a polyphenylene sulfide substrate, a polyarylate substrate, a polyimide substrate, a polycarbonate substrate, a triacetate cellulose substrate and a cellulose propionate substrate, the circuit layer includes a driving circuit for driving an LED chip, and the driving circuit is a thin film transistor , one of gate lines and signal lines, the planarization layer covers the circuit layer, the planarization layer is one or more of a polymer layer having a phenolic hydroxyl group, a polymer layer having an acrylic group, a polymer layer having an imide group, a polymer layer having an aromatic ether group, a polymer layer having an amide group, a polymer layer having a fluorine group, a polymer layer having a p-xylene group and a polymer layer having a vinyl alcohol group, preferably, the planarization layer is a polymer layer having polymethyl methacrylate and a polymer layer having polystyrene, the planarization layer can eliminate the valence jump difference on the circuit layer, so that the circuit layer is planarized.

[0026] In this embodiment, a first contact electrode and a second contact electrode are further provided on the surface of the planarization layer, and the first contact electrode is connected to the driving circuit in the circuit layer through the filling material in the through hole on the planarization layer, and the second contact electrode is connected to the power ground line in the circuit layer through the filling material in the through hole on the planarization layer, wherein the material of the first contact electrode, the second contact electrode and the filling material is one or more of aluminum, platinum, palladium, silver, magnesium, gold, nickel, neodymium, iridium, chromium, lithium, calcium, molybdenum, titanium, tungsten or copper.

[0027] In some embodiments, the flattening layer of the display backplane is subjected to proofing treatment so that the level of the LED at the edge of the display backplane is lower than the level of the LED in the middle of the display backplane. In this embodiment, since the circuit layer includes a driving circuit for driving the LED chip, proofing treatment is performed on the flattening layer so that the edge height of the flattening layer is lower than the height of the middle of the flattening layer, so that the level of the LED arranged in the middle of the flattening layer is higher than the LED at the edge of the flattening layer, and the LED arranged at the edge of the flattening layer is close to the joint seam, so that the effect of light superposition is generated at the joint seam, the light intensity at the joint seam is enhanced, and the shadow condition of the joint seam is improved.

[0028] In some embodiments, the LEDs at the edge of the display backplane and the LEDs in the middle of the display backplane are arranged on planes with different horizontal heights. Figure 3 As shown, Figure 3 FIG. 1 is a schematic diagram of a preferred embodiment of the present invention after the planarization layer on the display backplane is subjected to a sinking treatment. In this embodiment, the planarization layer of the display backplane is subjected to a sinking treatment so that the LEDs at the edge of the display backplane and the LEDs in the middle of the display backplane are arranged on planes with different horizontal heights, such as Figure 3 As shown, since the light emitted by the LED at the edge of the display backplane produces a focusing effect at the joint, the light intensity at the joint is increased, and at the same time, new weak light areas are formed on both sides of the joint, thereby reducing the shadow effect at the joint in terms of visual effect. Preferably, the height difference D formed by the plane where the LED at the edge of the display backplane is located and the plane where the LED in the middle of the display backplane is located is equal to the width C of the joint. In this embodiment, the design that the height difference D is equal to the width C of the joint is adopted to avoid the situation that when the sinking height D is too small, the focusing effect at the joint is not obvious, resulting in the poor visual effect of the prepared large-size LED display screen. At the same time, it also avoids the situation that when the sinking height D is too large, the light in the focusing area at the joint is too strong and the light in the weak light areas on both sides of the focusing area is too weak, resulting in new shadow areas on both sides of the joint, resulting in more serious shadow problems and affecting the display effect of the large-size LED display screen.

[0029] In some embodiments, the edge of the planarization layer is configured as an inclined surface, and the LEDs at the edge of the display backplane are configured on the inclined surface. Figure 4 As shown, Figure 4 The present invention is a schematic structural diagram of a preferred embodiment of the planarization layer on the display back panel after being subjected to an oblique beating treatment. In this embodiment, the planarization layer of the display back panel is subjected to an oblique beating treatment so that the LEDs at the edge of the display back panel are arranged on an inclined plane. The light emitted by the LEDs arranged on the inclined plane can also be gathered at the joint, thereby forming a focusing area, and weak light areas are formed on both sides of the focusing area. The formed weak light area changes the light intensity from the middle of the LED sub-display screen to the joint from strong to weak, and a suitable transition is obtained from the perspective of naked eye visual effect, so that the shadow effect at the joint is not obvious, thereby improving the display effect of a large-size LED screen.

[0030] In some embodiments, the horizontal height difference between the two ends of the inclined plane is equal to the width of the joint. In this embodiment, the horizontal height difference E between the two ends of the inclined plane is set to be equal to the width C of the joint. On the one hand, it avoids the situation that the focusing effect at the joint is not obvious due to the inclination angle being too small, resulting in the presence of obvious shadow effect at the joint, affecting the display effect of the large-size LED display screen. On the other hand, it avoids the situation that the light in the weak light area is too weak due to the inclination angle being too large, thereby generating a new shadow area, resulting in more shadow areas on the large-size LED display screen, and worse visual effects. Preferably, the edge inclination angle of the uLED display screen is 20°-70°.

[0031] In summary, the present invention provides an LED display screen, which performs a punching process on the flattening layer of the display backplane of the LED sub-display screen so that the horizontal height of the LED at the edge of the display backplane is lower than the horizontal height of the LED in the middle of the display backplane, so that the light at the splicing seam is cross-focused, thereby improving the light intensity at the splicing seam. At the same time, weak light areas are formed on both sides of the splicing seam, and the light intensity from the middle of the LED sub-display screen to the splicing seam is gradually weakened, and the degree of weakening is within the acceptable range for the naked eye, and will not cause obvious impact on the visual effect. The shadow condition of the existing large-size LED display screen at the splicing seam is improved, and the display effect of the large-size LED display screen is improved.

[0032] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A LED display screen, It is characterized in that The LED display screen is composed of a plurality of LED sub-display screens, the LED sub-display screens include a display back panel and LEDs arranged on the display back panel, there are joints between the plurality of LED sub-display screens, wherein the level of the LEDs at the edge of the display back panel is lower than the level of the LEDs at the middle of the display back panel; the display back panel includes a substrate, a circuit layer and a planarization layer arranged in sequence from bottom to top; the LEDs are arranged on the planarization layer; The substrate is one or more of a silicon dioxide substrate, a polyethersulfone substrate, a polyacrylate substrate, a polyetherimide substrate, a polyethylene terephthalate substrate, a polyphenylene sulfide substrate, a polyarylate substrate, a polyimide substrate, a polycarbonate substrate, a triacetate cellulose substrate, and a cellulose propionate substrate.

2. The LED display screen according to claim 1, It is characterized in that The height difference between the plane where the LEDs at the edge of the display backplane are located and the plane where the LEDs at the middle of the display backplane are located is equal to the width of the joint seam.

3. The LED display screen according to claim 1 or 2, It is characterized in that The LEDs at the edge of the display back panel and the LEDs at the middle of the display back panel are arranged on planes with different horizontal heights.

4. The LED display screen according to claim 1 or 2, It is characterized in that The planarization layer of the display backplane is subjected to a proofing process, so that the level of the LEDs at the edge of the display backplane is lower than the level of the LEDs at the middle of the display backplane.

5. The LED display screen according to claim 4, It is characterized in that The edge of the planarization layer is arranged as an inclined surface; and the LEDs at the edge of the display backplane are arranged on the inclined surface.

6. The LED display screen according to claim 5, It is characterized in that The horizontal height difference between the two ends of the inclined surface is equal to the width of the joint.

7. The LED display screen according to claim 5 or 6, It is characterized in that The inclination angle of the inclined surface is 20°-70°.

8. The LED display screen according to claim 1, It is characterized in that The planarization layer is one or more of a polymer layer having a phenolic hydroxyl group, a polymer layer having an acrylic group, a polymer layer having an imide group, a polymer layer having an aromatic ether group, a polymer layer having an amide group, a polymer layer having a fluorine group, a polymer layer having a p-xylene group and a polymer layer having a vinyl alcohol group.

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