Lamp panel and display device

Abstract

The utility model relates to a lamp panel and a display device. The lamp panel comprises a substrate, lamp beads and a box dam. The number of the lamp beads is multiple, and the multiple lamp beads are arranged on the substrate in an array mode. The multiple box dams are arranged on the substrate, and the multiple box dams are connected end to end and annularly arranged on the periphery of each lamp bead; wherein the width d1 and the height h1 of each box dam meet the following conditions: 0.5 d1 < = h1 < = d1; the width d1 of each box dam and the distance d2 between every two adjacent lamp beads meet the condition that d1 is smaller than or equal to d2. According to the lamp panel and the display device provided by the embodiment of the invention, the plurality of box dams which are adjacent end to end are annularly arranged on the periphery, so that the possibility of optical crosstalk generated when two adjacent lamp beads emit light can be blocked through the box dams. Meanwhile, by limiting the relation between the height h1 of the box dam and the width d1 of the box dam and the relation between the width d1 of the box dam and the distance d2 between every two adjacent lamp beads, the box dam glue is not prone to flowing, and the glue climbing phenomenon is not prone to occurring at the lamp beads.

Description

Technical Field

[0001] The present application relates to the field of LED display technology, and in particular to a light board and a display device. Background Art

[0002] LED lamps are widely used in lighting and display fields due to their excellent performance. LED lamp boards are arrayed on a circuit board, and the lighting or display function is achieved through the synergy of multiple lamp beads. However, since the lamp beads emit light on five sides, in order to prevent the two adjacent lamp beads from cross-talking, the solution of the related technology is to set a curable dam glue between the two adjacent lamp beads to reduce the possibility of cross-talk. However, the dam glue is prone to glue creeping at the lamp beads, thereby affecting the luminous effect of the lamp beads. Summary of the invention

[0003] Based on this, it is necessary to provide a lamp board to address the problem that when a curable dam glue is set between two adjacent lamp beads, the dam glue is easy to creep on the lamp beads, thereby affecting the luminous effect of the lamp beads.

[0004] A light panel, comprising:

[0005] substrate;

[0006] Lamp beads, the number of the lamp beads is multiple, and the multiple lamp beads are arrayed on the substrate;

[0007] A dam, the dam is arranged on the substrate, there are multiple dams, the multiple dams are connected end to end and are arranged around the periphery of each lamp bead;

[0008] The width d1 of each dam and the height h1 of each dam satisfy the following conditions:

[0009] 0.5d1≤h1≤d1;

[0010] The width d1 of each dam and the distance d2 between two adjacent lamp beads meet the following conditions:

[0011] d1≤d2.

[0012] In one embodiment, the distance d2 between two adjacent lamp beads satisfies the condition:

[0013] 0.3mm<d2≤0.7mm.

[0014] In one embodiment, the width d1 of the dam satisfies the following condition:

[0015] 0.3mm≤d1<0.7mm.

[0016] In one embodiment, the height h1 of the dam satisfies the following conditions:

[0017] 0.2mm≤h≤0.3mm.

[0018] In one embodiment, the height of the lamp bead is h2, and the height h1 of the dam and the height h2 of the lamp bead satisfy the following condition:

[0019] 0.9h2≤h1≤h2.

[0020] In one embodiment, the dam is made of a curing adhesive, and the viscosity μ of the curing adhesive satisfies the condition:

[0021] 15000cps≤μ≤30000cps.

[0022] In one embodiment, melanin is added into the dam.

[0023] In one embodiment, the cross section of the dam in a direction perpendicular to the axial direction thereof is semicircular or semi-elliptical.

[0024] In one embodiment, the width of the dam at the periphery of the substrate is greater than the width of the other dams.

[0025] The present application also provides a display device, which includes the light board described in any one of the above embodiments.

[0026] The light board provided by the present application is provided with a plurality of adjacent dams at the periphery of the lamp beads, so that the dams can be used to block the possibility of cross-lighting when two adjacent lamp beads emit light, prevent cross-lighting from the side angle, and reduce the situation of bright lines on the side of the light board, so that the light-emitting accuracy of the entire light board is higher. At the same time, by setting the height h1 of the dam to be greater than or equal to 0.5 times the width d1 of the dam, and less than or equal to 1 times the width d1 of the dam; and making the width d1 of each dam less than or equal to the distance d2 between two adjacent lamp beads, the height-to-width ratio of the dam is more appropriate, and the width d1 of the dam is limited to be less than or equal to the distance d2 between two adjacent lamp beads. In this way, when a dam glue that needs to be cured is set between two adjacent lamp beads, the dam glue is not easy to flow and cause glue creeping at the lamp beads, and the light-emitting effect of the light board finally prepared is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A partial schematic diagram of a light board provided for some embodiments of the present application.

[0028] Figure 2 for Figure 1 A cross-sectional view at AA is shown.

[0029] Figure 3 for Figure 2 A local enlarged view of point B is shown.

[0030] Figure numerals: 100 - substrate; 200 - lamp beads; 300 - dam. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] The common module packaging process of LED light boards made using Mini / Micro LED is: fix the LED lamp beads on the PCB board, then mold epoxy resin glue on the PCB board, laminate it, and then cut it according to the required size to form the required LED light board. Since the lamp beads emit light on five sides, in order to prevent the two adjacent lamp beads from stringing light, the usual solution is to use a mask on the surface of the lamp beads to fill the gap between the lamp beads. However, the mask needs to be placed and aligned by manual observation first, and then installed by rolling with a roller. For tiny-sized lamp beads, the operation is more troublesome, and the risk of the lamp beads being bumped and falling is high. At the same time, the existing mask ink structure is gray, which is difficult to achieve consistency, resulting in poor overall screen effect and contrast of the display device finally prepared by the lamp board. In addition, the mask has a large blocking range, which can easily cause the display device's light-emitting viewing angle to be less than ideal. The upper and lower viewing angles can only be 140 degrees, and the left and right viewing angles are 160 degrees. Based on the above problems, related research has proposed a method of applying dam glue in the gaps between lamp beads, and leaving the dam glue to stand for a period of time to solidify. However, due to the low viscosity of the colloid and a certain fluidity, after the gluing operation, the colloid will automatically flow to the middle of the gap between adjacent lamp beads, making it easy for capillary phenomena to occur between the surface of the lamp beads and the colloid, resulting in uneven height of the colloid, and then causing glue creeping at the lamp beads, thereby affecting the luminous effect of the lamp beads.

[0038] Based on the above problems, this application provides a light board. Figure 1-Figure 3 , Figure 1 A partial schematic diagram of a light board provided in some embodiments of the present application is shown. Figure 2 Shows Figure 1 A cross-sectional view at AA is shown. Figure 3 Shows Figure 2 A partial enlarged view of point B is shown. An embodiment of the present application provides a lamp board, which includes a substrate 100, lamp beads 200 and a dam 300. There are multiple lamp beads 200, and the multiple lamp beads 200 are arranged in an array on the substrate 100; the dam 300 is arranged on the substrate 100, and the number of the dams 300 is multiple, and the multiple dams 300 are connected end to end and arranged around the periphery of each lamp bead 200; wherein the width d1 of each dam 300 and the height h1 of the dam 300 satisfy the condition: 0.5d1≤h1≤d1; the width d1 of each dam and the distance d2 between two adjacent lamp beads satisfy the condition: d1≤d2.

[0039] The lamp board provided by the embodiment of the present application is provided with a plurality of dams 300 adjacent to each other at the periphery of the lamp beads 200, so that the dams 300 can be used to block the possibility of cross-lighting when two adjacent lamp beads 200 emit light, prevent cross-lighting from the side angle, and reduce the situation of bright lines on the side of the lamp board, so that the light-emitting accuracy of the entire lamp board is higher. At the same time, by setting the height h1 of the dam 300 to be greater than or equal to 0.5 times the width d1 of the dam 300, and less than or equal to 1 times the width d1 of the dam 300; and making the width d1 of each dam 300 less than or equal to the distance d2 between two adjacent lamp beads 200, the width-to-height ratio of the dam 300 is more appropriate, and the width d1 of the dam is limited to be less than or equal to the distance d2 between two adjacent lamp beads 200. In this way, when the dam glue that needs to be cured is set between two adjacent lamp beads 200, the dam glue is not easy to flow and produce glue creeping phenomenon at the lamp beads 200, and the light-emitting effect of the lamp board finally prepared is better.

[0040] In one specific embodiment, the width d1 of each dam 300 is equal to the height h1 of the dam 300. In another specific embodiment, the width d1 of each dam 300 is equal to 0.5 times the height h1 of the dam 300. In yet another specific embodiment, the width d1 of each dam 300 is equal to 0.8 times the height h1 of the dam 300.

[0041] In one embodiment, the substrate 100 is a PCB board.

[0042] In one embodiment, the dam 300 is made of dam glue, and the dam glue is a curing glue that can be cured. Specifically, the curing method of the dam glue is not limited to heat curing, room temperature curing and light curing. If the temperature curing method is selected, the dam glue is epoxy resin; if the light curing method is selected, the dam glue is UV glue.

[0043] In a specific embodiment thereof, a damming machine is used to perform a damming operation at the center line of adjacent lamp beads 200 on the substrate 100 .

[0044] The structure of the light board is described in detail below.

[0045] See also Figure 2 In some embodiments, the distance d2 between two adjacent lamp beads 200 satisfies the condition: 0.3mm<d2≤0.7mm. By setting the distance d2 between two adjacent lamp beads 200 to be greater than 0.3mm, the distance between the two adjacent lamp beads 200 will not be too close to each other, so that when preparing the lamp board, the dam glue between the adjacent lamp beads 200 is not easy to crawl glue at the lamp beads 200. d2 is less than or equal to 0.7mm, which makes the dam meaningful for implementation. When the distance d2 between the lamp beads exceeds 0.7mm, the industry has a mature face mask method that can be used instead. In one specific embodiment, the distance d2 between two adjacent lamp beads 200 is 0.4mm. In another specific embodiment, the distance d2 between two adjacent lamp beads 200 is 0.7mm. In another specific embodiment, the distance d2 between two adjacent lamp beads 200 is 0.31mm.

[0046] In the present application, the distance d2 between two adjacent lamp beads 200 is set to be greater than 0.3 mm, and the height h1 of the dam 300 is set to be greater than or equal to 0.5 times the width d1 of the dam 300 and less than or equal to 1 times the width d1 of the dam 300. When the lamp board is prepared, the width of the dam glue is smaller than the spacing between the lamp beads 200, and the dam glue is always in contact with the bottom substrate 100 only, and does not contact the surface of the lamp bead 200, thereby reducing the glue creeping phenomenon on the lamp bead 200 caused by capillary phenomenon.

[0047] See also Figure 2 In some embodiments, the width d1 of the dam 300 satisfies the condition: 0.3mm≤d1≤0.7mm. By setting the width d1 of the dam 300 to be within the range of greater than or equal to 0.3mm and less than or equal to 0.7mm, the dam 300 is not easy to abut against the lamp beads 200 on both sides, so that when preparing the dam 300, the dam glue is not easy to climb on the lamp beads 200. In one specific embodiment, the width d1 of the dam 300 is 0.3mm. In another specific embodiment, the width d1 of the dam 300 is 0.7mm. In another specific embodiment, the width d1 of the dam 300 is 0.5mm.

[0048] See also Figure 3In some embodiments, the height h1 of the dam 300 satisfies the condition: 0.2mm≤h≤0.3mm. By setting the height h1 of the dam 300 to be within the range of greater than or equal to 0.2mm and less than or equal to 0.3mm, the dam 300 is not easily too high, and thus the dam glue is not easily collapsed when preparing the dam 300. In one specific embodiment, the height h1 of the dam 300 is 0.2mm. In another specific embodiment, the height h1 of the dam 300 is 0.3mm. In another specific embodiment, the height h1 of the dam 300 is 0.25mm.

[0049] See also Figure 3 In some embodiments, the height of the lamp bead 200 is h2, and the height h1 of the dam 300 and the height h2 of the lamp bead 200 satisfy the condition: 0.9h2≤h1≤h2. By setting the height h1 of the dam 300 to be greater than or equal to 0.9 times the height h2 of the lamp bead 200, and less than or equal to the height of the lamp bead 200, the height of the dam 300 is more reasonable than the height of the lamp bead 200, which can reduce the possibility of cross-lighting between two adjacent lamp beads 200 when they emit light; and because the width of the dam 300 is less than the distance between the lamp beads 200, and the height of the lamp beads 200 is low, even if the dam 300 and the lamp bead 200 are almost the same height, there is still a large light-emitting angle after being made into a display device. Such an arrangement makes the height difference between the height h1 of the dam 300 and the height h2 of the lamp bead 200 less than or equal to 10%, and the height difference between the dam glue and the lamp bead 200 ranges from 20μm to 30μm, which has an acceptable impact on the flatness of the entire lamp panel.

[0050] In some of the embodiments, the dam 300 is made of curing glue, and the viscosity μ of the curing glue satisfies the condition: 15000cps≤μ≤30000cps. By setting the viscosity μ of the curing glue used to prepare the dam 300 to be greater than or equal to 15000cps and less than or equal to 30000cps, the dam glue is less likely to flow and collapse during the curing process, and the glue climbing phenomenon of the lamp beads 200 is reduced, and the structural shape of the dam 300 finally prepared can also be effectively guaranteed. In one specific embodiment, the viscosity μ of the curing glue is 15000cps. In another specific embodiment, the viscosity μ of the curing glue is 30000cps. In another specific embodiment, the viscosity μ of the curing glue is 20000cps.

[0051] In some embodiments, melanin is added to the dam 300. By adding melanin to the dam 300, the dam 300 has a light-absorbing effect, thereby covering the base color of the substrate 100, improving the ink color consistency of the entire lamp board, and thus making the contrast of the display device prepared by the lamp board better.

[0052] See also Figure 2 and Figure 3 In some embodiments, the cross section of the dam 300 in the direction perpendicular to the axial direction thereof is semicircular or semi-elliptical. It should be noted that the plurality of dams 300 on the periphery of the lamp bead 200 are divided into Figure 1 A dam extending in the xx' direction and a dam extending in the yy' direction.

[0053] When the axial direction of the dam 300 itself is Figure 1 In the xx' direction, the dam 300 is perpendicular to its own axial direction, that is, Figure 1 The cross section in the yy' direction is semicircular or semi-elliptical. Figure 1 In the yy' direction, the dam 300 is perpendicular to its own axial direction, that is, Figure 1 The cross section in the xx' direction is semicircular or semi-elliptical.

[0054] By setting the cross section of the dam 300 perpendicular to its own axial direction to be semicircular or semi-elliptical, the preparation process of the dam 300 is relatively simple, and the structure of the dam glue before curing is relatively stable and not prone to collapse. At the same time, the curved surface structure of the outer peripheral surface of the dam 300 away from the substrate 100 can also scatter a large amount of light beams emitted from the lamp beads 200 to the side, so that not only the side light of the lamp beads 200 is retained, but also the light emitted to the front of the lamp beads 200 is increased, the uniformity of the side light is improved, and the side light of the lamp board is uniformly lighted, which improves the display effect of the side view.

[0055] See also Figure 1 and Figure 2 In some embodiments, the width of the dam 300 at the periphery of the substrate 100 is greater than the width of other dams 300. By setting the width of the dam 300 at the periphery of the substrate 100 to be greater than the width of other dams 300, the lamp beads 200 at the periphery of the substrate 100 can be effectively protected by the dam 300, avoiding the possibility of the outermost circle of lamp beads 200 on the lamp board being damaged by collision.

[0056] The present application also provides a display device, which includes the light board described in any one of the above embodiments and can achieve at least one of the above technical effects.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0058] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A light board, characterized in that: The light board comprises: substrate; Lamp beads, the number of the lamp beads is multiple, and the multiple lamp beads are arrayed on the substrate; A dam, the dam is arranged on the substrate, there are multiple dams, the multiple dams are connected end to end and are arranged around the periphery of each lamp bead; The width d1 of each dam and the height h1 of each dam satisfy the following conditions: 0.5d1≤h1≤d1; The width d1 of each dam and the distance d2 between two adjacent lamp beads meet the following conditions: d1≤d2.

2. The light board according to claim 1, characterized in that: The distance d2 between two adjacent lamp beads satisfies the condition: 0.3mm<d2≤0.7mm.

3. The light board according to claim 1, characterized in that: The width d1 of the dam satisfies the following conditions: 0.3mm≤d1<0.7mm.

4. The light board according to claim 1, characterized in that: The height h1 of the dam meets the following conditions: 0.2mm≤h1≤0.3mm.

5. The light board according to any one of claims 1 to 4, characterized in that: The height of the lamp bead is h2, and the height of the dam h1 and the height of the lamp bead h2 satisfy the following conditions: 0.9h2≤h1≤h2.

6. The light board according to any one of claims 1 to 4, characterized in that: The dam is made of curing glue, and the viscosity μ of the curing glue satisfies the following conditions: 15000cps≤μ≤30000cps.

7. The light board according to claim 6, characterized in that: Melanin is added into the dam.

8. The light board according to any one of claims 1 to 4, characterized in that: The cross section of the dam in a direction perpendicular to the axial direction of the dam is semicircular or semi-elliptical.

9. The light board according to any one of claims 1 to 4, characterized in that: The width of the dam at the periphery of the substrate is greater than the width of the other dams.

10. A display device, characterized in that: A light board comprising any one of claims 1-9.

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