CN111383545A - Light board module for LED display - Google Patents

Abstract

A light panel module for an LED display screen, including a light panel and multiple packages. The packages are spaced apart from each other on the light panel. Each package includes a substrate, at least two pixels provided on the substrate, and an packaging material covering the pixels. Each of the pixels It has a first light-emitting diode chip, a second light-emitting diode chip, and a third light-emitting diode chip. The packaging material has grooves between the pixels, and the width of the grooves is equal to the spacing between the packages. The distance is equal. Forming grooves between each pixel on the packaging material reduces the total reflection of a single pixel in the packaging material, making the color performance more consistent, and further limiting the width of the groove to each pixel. The spacing distance between packages is equal, which can visually reduce the occurrence of mosaic-like situations.

Description

Light board module for LED display

technical field

The invention relates to a light panel module, in particular to a light panel module with multi-pixel encapsulation and used in an LED display screen.

Background technique

In order to have a better display effect on the existing LED display screen, a common method is to reduce the volume of the package body of each pixel on a display screen of the same size to allow more pixels to be arranged in close proximity, thereby improving the display screen. However, when the volume of each package body is getting smaller and smaller, the plurality of external electrodes corresponding to connecting the LED chips in each pixel will be denser and denser, making the subsequent circuit fabrication more dense and increasing the overall fabrication cost and production difficulty.

Therefore, another method is to directly encapsulate multiple groups of pixels with packaging materials, so that there are multiple groups of pixels in a single package, so that the LED chips in each pixel can be placed closer to each other. However, this method is to directly package multiple groups of pixels. Pixels, each light-emitting diode chip of each pixel in the package is encapsulated in the same layer of packaging material, and there is no structure between the adjacent two groups of pixels, and the pixels in the middle or around the packaging material are prone to total reflection. The physical phenomenon results in different light emitting angles, which in turn increases the light mixing between the pixels inside the package, which affects the color performance of the display screen.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a light panel module for an LED display screen.

The light panel module used for the LED display screen of the present invention includes a light panel and a plurality of encapsulation bodies, the encapsulation bodies are arranged on the lamp board at intervals, and each of the encapsulation bodies includes a substrate, at least two Pixels disposed on the substrate, and a packaging material covering the pixels, each of the pixels has a first light-emitting diode chip, a second light-emitting diode chip, and a third light-emitting diode chip, and the packaging material has a There are grooves between the pixels, and the width of the grooves is equal to the spacing between the packages.

In the embodiment of the light panel module used in the LED display screen of the present invention, each of the package bodies includes four pixels, the grooves are arranged to separate the pixels in a criss-cross pattern, and the grooves have a transverse direction in the transverse direction. The width has a longitudinal width in the longitudinal direction, and each package has a lateral spacing distance in the lateral direction and a longitudinal spacing distance in the longitudinal direction, the lateral width is equal to the lateral spacing distance, and the longitudinal width is equal to the longitudinal spacing distance .

Preferably, the first light emitting diode chip, the second light emitting diode chip and the third light emitting diode chip in each pixel are arranged in a longitudinal direction, and each of the package bodies is separated by the groove. Four sub-encapsulation parts with the pixels respectively are obtained, and the centers of the pixels of the two adjacent sub-encapsulation parts in the lateral direction are in the same direction in the lateral direction to the periphery of the packaging body and to the concave The edges of the grooves are equidistant.

More preferably, at the center of the first light-emitting diode chip of the pixels of the two adjacent sub-package parts in the longitudinal direction, the direction of the longitudinal direction away from the second light-emitting diode chip reaches the package body. The distance from the peripheral edge of the groove to the edge of the groove is equal, and the lengths of the sub-package parts in the longitudinal direction are equal to each other.

In another embodiment of the light panel module used in the LED display screen of the present invention, the first light emitting diode chip, the second light emitting diode chip, and the third light emitting diode chip in each pixel are in the lateral direction arranged in a direction, each of the package bodies is divided by the groove into four sub-package parts with the pixels respectively, and the third sub-package parts of the pixels of the two adjacent sub-package parts in the lateral direction The distance from the center of the light-emitting diode chip to the direction away from the second light-emitting diode chip in the lateral direction to the periphery of the package body and the edge of the groove are equal, and the widths of the sub-packages in the lateral direction are equal to each other .

Preferably, in the center of the pixels of the two adjacent sub-package parts in the longitudinal direction, the distances from the periphery of the package body and the edge of the groove in the same direction in the longitudinal direction are equal.

The beneficial effects of the present invention are: forming grooves between the pixels on the packaging material, reducing the total reflection of a single pixel in the packaging material, making the color performance more consistent, and further limiting the use of the grooves The width of the package is equal to the spacing between the packages, so that the pixel pitch in the package can be the same as the pixel spacing of the adjacent package, which can visually reduce the occurrence of mosaic-like situations.

Description of drawings

FIG. 1 is a schematic top view illustrating a first embodiment of a light panel module for an LED display screen according to the present invention;

FIG. 2 is a schematic cross-sectional side view to assist in explaining the first embodiment of FIG. 1;

3 is a schematic top view illustrating a second embodiment of a light panel module for an LED display screen of the present invention; and

FIG. 4 is a schematic cross-sectional side view to assist in explaining the second embodiment of FIG. 3 .

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 and FIG. 2 , a first embodiment of a lamp panel module for an LED display screen of the present invention includes a lamp panel 2 and a plurality of packages 3 disposed on the lamp panel 2 .

Specifically, the light board 2 is selected from light board substrates used for display screens, the package bodies 3 are arranged on the light board 2 in an array and spaced apart from each other, and the package bodies 3 adjacent to each other in the lateral direction X There is a lateral spacing distance D ₁ therebetween, and a longitudinal spacing distance D ₂ between the adjacent packages 3 in the longitudinal direction Y.

Each of the packages 3 includes a substrate 30 , four sets of pixels 31 disposed on the substrate 30 and having three LED chips respectively, and a packaging material 32 covering the pixels 31 . The substrate 30 is selected from a circuit board, and the packaging material 32 has grooves 320 located between the pixels 31. The grooves 320 separate the pixels 31 in a criss-cross pattern, and the packaging body 3 is divided into four with the pixels respectively. The sub-package portion 33 of 31; wherein, the groove 320 has a transverse width W1 in the transverse direction X and a longitudinal width W2 in the longitudinal direction Y. It should be noted that, the present invention mainly encapsulates a plurality of pixels 31 into a single package 3 through the packaging material 32 , and each package 3 includes at least two groups of pixels 31 . In this embodiment, each of the The number of 31 groups of pixels in the package body 3 is illustrated by taking four groups as an example, but it is not limited thereto, and may also be two groups, three groups, or more than four groups. The material suitable for the packaging material 32 in this embodiment can be selected from transparent polymer materials, or other materials used for packaging light-emitting diode chips. The selection of such materials is well known to those skilled in the art, and will not be repeated here.

The number and arrangement of the pixels 31 are not particularly limited, and they can be arranged in a one-dimensional manner such as rows and columns of 1×2, 1×3, 1×4, 1×5, etc., and can also be arranged in rows and columns of 2 ⁿ ×2 ^m . (n and m are natural numbers, and n and m are between 1 and 3) arranged in a two-dimensional matrix. In this embodiment, the pixels 31 are arranged in a two-dimensional matrix, and each pixel 31 has a first LED chip 311 , a second LED chip 312 , and a third LED chip 313 , The three LED chips are arranged in sequence along the longitudinal direction Y. In addition, the first LED chip 311 is a red LED chip capable of emitting wavelengths ranging from 605 nm to 645 nm, and the second LED chip 312 is capable of emitting a red LED chip. Taking a green light-emitting diode chip with a wavelength of 510 nm to 545 nm, the third light-emitting diode chip 313 is an example of a blue light-emitting diode chip capable of emitting a wavelength of 450 nm to 485 nm.

In detail, the grooves 320 are arranged between the pixels 31 , which can reduce the total reflection of a single pixel 31 in a single package body 3 due to the increase in the inner side of the package material 32 , thereby allowing the light panel module of the present invention to be applied to When the display screen is used, the color performance is more consistent. In addition, the arrangement of the groove 320 can also avoid light mixing between adjacent pixels 31 in a single package.

More preferably, in this embodiment, the width of the groove 320 is further equal to the distance between the packages 3 , that is, the lateral width W ₁ of the groove 320 is equal to the distance between the packages 3 . The lateral spacing distance D ₁ between them is equal, and the longitudinal width W ₂ of the groove 320 is equal to the longitudinal spacing distance D ₂ between the packages 3 . By making the widths (W ₁ , W ₂ ) of the grooves 320 equal to the spacing distances (D ₁ , D ₂ ) between the packages 3 , the size of the sub-package portion 33 in a single package 3 can be and the spacing between the sub-package parts 33 is the same as the size and spacing of the sub-package parts 33 of the adjacent package body 3. The same size and the same distance from each other, when applied to the display screen, can visually reduce the occurrence of mosaic-like situations, especially when viewing at close range.

It should be noted here that, in this embodiment, the horizontal width W ₁ , the horizontal separation distance D ₁ , the vertical width W ₂ , and the vertical separation distance D ₂ are equal to each other, but the horizontal direction X and the vertical direction can also be set depending on the application. Each Y has different widths and spacing distances, as long as the horizontal width W ₁ is equal to the horizontal spacing distance D ₁ , and the vertical width W ₂ is equal to the vertical spacing distance D ₂ .

Further, in this embodiment, in the lateral direction X, the centers of the pixels 31 of the two adjacent sub-package parts 33 are in the same direction in the lateral direction X to the periphery of the package body 3 and to the groove 320. are equal distances from the edges. For example, in the present embodiment, the four groups of pixels 31 are arranged in a two-dimensional matrix, and it is defined that the first group of pixels 31 is located at the first row and first column of each package body 3, and in the lateral direction X The pixels 31 adjacent to the first group of pixels 31 are the second group of pixels 31, the pixels 31 adjacent to the first group of pixels 31 in the longitudinal direction Y are the third group of pixels 31, and the last pixel 31 is the fourth group of pixels 31. Therefore, the distance E 1 from the first group of pixels 31 and the third group of pixels 31 to the periphery of the package body 3 in the lateral direction X will be the same as the distance E ₁ from the second group of pixels 31 and the fourth group of pixels 32 to the lateral direction X to the groove The distance E ₂ from the edge of the groove 320 is equal; similarly, the distance E 3 from the first group of pixels 31 and the third group of pixels 31 to the edge of the groove 320 in the lateral direction X is the same as the distance E ₃ of the second group of pixels 31 and the fourth group of pixels 31 The distance E ₄ from the pixel 31 to the periphery of the package body 3 in the lateral direction X is equal.

In addition, in the center of the first LED chip 311 of the pixel 31 in the adjacent two sub-package parts 33 in the longitudinal direction Y, the direction of the longitudinal direction Y away from the second LED chip 312 reaches the package body The distance from the periphery of 3 to the edge of the groove 320 is equal, and the lengths L of the sub-packages 33 in the longitudinal direction Y are equal to each other. For example, the center of the first light emitting diode chip 311 of the first group of pixels 31 or the second group of pixels 31 is opposite to the distance F ₁ from the second light emitting diode chip 312 to the periphery of the package body 3 in the longitudinal direction Y, It will be equal to the distance F ₂ from the center of the first LED chip 311 of the third group of pixels 31 or the fourth group of pixels 31 to the longitudinal direction Y from the second LED chip 312 to the edge of the groove 320 .

It should be noted here that, when adjusting the light-emitting angle of the existing display screen, the entire display screen is usually adjusted by an installation mechanism to control the light-emitting angle, or an additional lens is added to control the light-emitting angle. When the light panel module of an embodiment is applied to a display screen, the light-emitting angle in the lateral direction X of the light panel module can be directly controlled by adjusting the distances E ₁ , E ₃ (distances E ₂ , E ₄ ), that is, That is, when the distance E1 is increased, the distance E3 will be relatively small, so that the light _- emitting angle _of the light _- emitting chip increases from the distance E1 to the light _- emitting angle from the distance E3 to relatively small.

In the light panel module used for the LED display screen of the present invention, after the packaging material 32 covers the pixels 31 for packaging, the packaging material 32 is cut by a cutting tool to form the groove between the pixels 31 320, and while forming the groove 320, the distance E ₁ , the distance E ₂ , the distance E ₃ and the distance E ₄ are adjusted. The method of forming the groove 320 is not limited to a cutting tool, and a mold can also be used to form the packaging material 32 with the groove 320 directly on the pixel 31 .

It is worth noting here that when a cutting tool is used to form the groove 320, since the cutting tool itself has a fixed cutting width, the width of the subsequent formation of the groove 320 is limited, and even causes the package body 3 to have a fixed cutting width. Each of the sub-packages 33 and the pixels 31 cannot be symmetrically arranged. Therefore, when the light panel module for the LED display of the present invention uses a cutting tool to form the groove 320, a symmetrical cutting method is used to achieve the required concave. Slot width.

For example, the cutting width of the general cutting tool is divided into 0.5 mm and 1.0 mm. When the width of the groove 320 is to be 1.4 mm, if the cutting tool is used to cut a width of 1.0 mm, the second cutting is performed. When cutting 0.4mm, the cutting tool must cut 0.4mm along the packaging material 32 and only one side is stressed, which is easy to cause the cutting tool to skim or break. When cutting the width of 1.4mm, the module will use a cutting tool with a cutting width of 0.5mm and cut three times. The width of the packaging material 32 between the two grooves is 0.4 mm, and finally the packaging material 32 with the middle width of 0.4 mm is cut off. When the groove 320 is formed in this way, the cutting tool does not have The situation of unilateral force is generated, which can avoid the phenomenon of knife skimming or knife breaking.

Referring to FIG. 3 and FIG. 4 , a second embodiment of a light panel module for an LED display screen of the present invention is substantially the same as the first embodiment, except that the first light emitting diode of the second embodiment The chips 311 , the second LED chips 312 , and the third LED chips 313 are arranged along the lateral direction X. Specifically, the structure of the second embodiment is similar to that of the first embodiment. Therefore, in the second embodiment, in the lateral direction X, the third one of the pixels 31 of the two adjacent sub-package parts 33 is The center of the light emitting diode chip 313 is far from the second light emitting diode chip 312 in the lateral direction X, and the distances from the periphery of the package body 3 to the edge of the groove 320 are equal, and each sub-package portion 33 faces the lateral direction X. The widths are equal to each other; in the center of the pixel 31 of the two adjacent sub-package parts 33 in the longitudinal direction Y, the distances from the same direction in the longitudinal direction Y to the periphery of the package body 3 and to the edge of the groove 320 are equal . Similarly, by adjusting the distances E ₁ and E ₃ (distances E ₂ and E ₄ ), the light-emitting angle in the longitudinal direction Y of the light panel module can be directly controlled. Since the second embodiment is different from the first embodiment only in the arrangement direction of the light-emitting diode chips, and the arrangement and logic of each pitch are the same as those of the first embodiment, detailed descriptions are omitted here.

To sum up, in the light panel module of the present invention for an LED display screen, grooves 320 are formed on the packaging material 32 between the pixels 31 to reduce the total reflection of a single pixel 31 in the packaging material 32 , to make the color performance more consistent, and further make the width of the groove 320 equal to the distance between the packages 3 , so that the size of the sub-package portion 33 in a single package body 3 and the sub-package The spacing between the parts 33 is the same as the size and spacing of the sub-package parts 33 in the adjacent package body 3, that is, the size of each sub-package part 33 in the light panel module is the same and the distance from each other is also the same. , when applied to the display screen, it can visually reduce the occurrence of mosaic-like situations. In addition, when the groove 320 is formed in a symmetrical cutting manner, the cutting tool can be prevented from being subjected to unilateral force during the cutting process. , so as to avoid the phenomenon of knife skimming or knife breaking, so the purpose of the present invention can indeed be achieved.

Claims (6)

1. A light panel module for an LED display screen; it is characterized in that: The light panel module for an LED display screen includes a light panel and a plurality of encapsulation bodies, the encapsulation bodies are arranged on the lamp board at intervals, and each of the encapsulation bodies includes a substrate, at least two The pixels on the substrate and the packaging material covering the pixels, each of the pixels has a first light emitting diode chip, a second light emitting diode chip, and a third light emitting diode chip, and the packaging material has There are grooves between the pixels, and the width of the grooves is equal to the spacing between the packages. 2 . The light panel module for an LED display screen according to claim 1 , wherein each of the encapsulation bodies comprises four pixels, the grooves separate the pixels in a criss-cross pattern, and the The grooves have a transverse width in the transverse direction and a longitudinal width in the longitudinal direction, and each package body has a transverse spacing distance in the transverse direction and a longitudinal spacing distance in the longitudinal direction. The transverse width is equal to the transverse spacing distance, and the longitudinal width equal to the longitudinal separation distance. 3. The light panel module for an LED display screen according to claim 2, wherein the first light-emitting diode chip, the second light-emitting diode chip, and the third light-emitting diode chip in each pixel The light-emitting diode chips are arranged in the longitudinal direction, and each of the package bodies is divided into four sub-package parts with the pixels respectively by the grooves, and the pixels of the two adjacent sub-package parts in the lateral direction are divided into four sub-package parts. The distance from the center of the package body to the periphery of the package body and the edge of the groove in the same direction in the lateral direction is equal. 4 . The light panel module for an LED display screen according to claim 3 , wherein the first light-emitting diode chips of the pixels of the two adjacent sub-package parts in the longitudinal direction have The distance from the center to the longitudinal direction away from the second light emitting diode chip to the periphery of the package body and to the edge of the groove is equal, and the lengths of the sub-package parts in the longitudinal direction are equal to each other. 5. The light panel module for an LED display screen according to claim 2, wherein the first LED chip, the second LED chip, and the third LED chip in each pixel The light-emitting diode chips are arranged in the lateral direction, and each of the package bodies is divided into four sub-package parts with the pixels respectively by the grooves, and the two adjacent sub-package parts in the lateral direction The center of the third light-emitting diode chip of the pixel, the distance from the direction away from the second light-emitting diode chip in the lateral direction to the peripheral edge of the package body and the edge of the groove are equal, and each sub-package part is toward the edge of the groove. The widths in the lateral direction are equal to each other. 6 . The light panel module for an LED display screen according to claim 5 , wherein the centers of the pixels of the two adjacent sub-package parts in the longitudinal direction are oriented to the same direction in the longitudinal direction. 7 . The peripheral edge of the package body is the same distance from the edge of the groove.

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