CN116884962A - Isotropic LED lamp bead, LED display system and movie screen - Google Patents

Isotropic LED lamp bead, LED display system and movie screen Download PDF

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Publication number
CN116884962A
CN116884962A CN202310919974.9A CN202310919974A CN116884962A CN 116884962 A CN116884962 A CN 116884962A CN 202310919974 A CN202310919974 A CN 202310919974A CN 116884962 A CN116884962 A CN 116884962A
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CN
China
Prior art keywords
light
colloid
lamp bead
isotropic
led
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Pending
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CN202310919974.9A
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Chinese (zh)
Inventor
王鹏
王鹍
时大鑫
王修齐
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Zhengzhou Shenglong Information Technology Co ltd
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Zhengzhou Shenglong Information Technology Co ltd
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Priority to CN202310919974.9A priority Critical patent/CN116884962A/en
Publication of CN116884962A publication Critical patent/CN116884962A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52—Encapsulations
    • H01L33/54—Encapsulations having a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Abstract

The invention discloses an isotropic LED lamp bead, which comprises a light emitting chip, a lamp bead bracket, an encapsulation colloid and a lampshade arranged above the encapsulation colloid. The light-emitting chip is electrically connected with the lamp bead bracket. The inside of the packaging colloid and the upper part of the light-emitting chip are covered with a light-transmitting colloid, and the light-transmitting colloid is formed with a smooth cambered surface which is concave downwards. The lamp cover is covered on the upper part of the packaging colloid, and the lamp cover is provided with a convex light expansion part. The inner surface of the light expansion part is a smooth cambered surface, and a refraction cavity is formed between the inner surface of the light expansion part and the upper surface of the light-transmitting colloid. The lampshade can change the original point light source of the lamp bead into a surface light source, so that the light emitting angle of the lamp bead is effectively enlarged, and the color is not deviated when the lamp bead is watched from all directions. The invention also discloses an LED display system and a movie screen, wherein the isotropic LED lamp beads are arranged above the LED display system and the movie screen. The reality of the environment simulation of the LED display system is effectively improved, and the film watching effect of the film screen is also improved.

Description

Isotropic LED lamp bead, LED display system and movie screen
Technical Field
The invention belongs to the technical field of LED display, and particularly relates to an isotropic LED lamp bead, an LED display system and a movie screen.
Background
Currently, LED display systems are widely used in the field of virtual photography. In a virtual studio, the requirements for shooting effect are high, and besides meeting conventional indexes, the requirements for higher specifications such as frame rate, color and the like are also required to be paid attention to. However, in the prior art, when a plurality of LED display screens are shot, the images are shot from different angles under the same image, and the image color display of the plurality of display screens has differences, so that the reality of the environment simulation is affected. The problem of color temperature shift at large angles is closely related to the design of the display screen interior, i.e. to the design of the lamp beads. When the eyes look at the lamp beads, the correct color presented by the lamp beads can be observed; if the angle of the lamp beads observed by the eyes is gradually reduced and approaches to the horizontal, a vision blind area or dead angle exists, and the observed color is deviated. The color deviation is caused by the fact that the light emitted by one or two luminous lampwicks is blocked, and the human eyes do not completely observe the light of three colors. This is true for a single bead, as is the entire display screen. The lamp beads manufactured by the traditional technology are difficult to fundamentally solve the problem.
Disclosure of Invention
The invention aims to solve the technical problems that: the isotropic LED lamp bead, the LED display system and the movie screen are provided, and the problems that in the prior art, the lamp bead is watched from different angles in the direct display process of the lamp bead in the screen, and the color is deviated are solved.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide an isotropic LED lamp bead, which comprises a light emitting chip, a lamp bead bracket, an encapsulation colloid and a lampshade arranged above the encapsulation colloid; the number of the light emitting chips is multiple, the light emitting chips are arranged above the lamp bead bracket, and the light emitting chips are electrically connected with the lamp bead bracket; the lamp bead bracket is arranged in the packaging colloid; a light-transmitting colloid is covered in the packaging colloid and above the light-emitting chip, and the light-transmitting colloid is formed with a smooth cambered surface which is concave downwards; the lamp shade covers the top of closing the encapsulation colloid, the lamp shade has a convex light expansion portion, light expansion portion is kept away from in the direction of encapsulation colloid extends, light expansion portion's internal surface is smooth cambered surface, light expansion portion's internal surface with form the refracting cavity between the upper surface of printing opacity colloid.
In some embodiments, the cross-sectional dimension of the light spreading portion gradually decreases in a direction away from the encapsulant.
In some embodiments, the bead support includes an anode support and a cathode support, the number of cathode supports corresponding to the number of light emitting chips; the bottom surface of the light-emitting chip is fixed on the upper surface of the anode bracket through conductive colloid, and a wire is connected between the upper surface of the light-emitting chip and the cathode bracket.
In some embodiments, the light expansion part includes a first cambered surface and a second cambered surface, and a horizontal plane where a portion where the first cambered surface and the light-transmitting glue body are in contact is a reference plane.
In some embodiments, the vertical distance from the arc surface vertex of the first arc surface to the reference plane is equal to the vertical distance from the arc surface vertex of the upper surface of the light-transmitting colloid to the reference plane; or the vertical distance from the cambered surface top of the first cambered surface to the reference plane is smaller than the vertical distance from the cambered surface top of the upper surface of the light-transmitting colloid to the reference plane; or the vertical distance from the cambered surface top point of the first cambered surface to the reference plane is larger than the vertical distance from the cambered surface top point of the upper surface of the light-transmitting colloid to the reference plane.
In some embodiments, the lampshade is made of transparent materials, and the lampshade is made of epoxy resin.
In some embodiments, the shape of the top edge of the encapsulant is square, the edge of the lower bottom surface of the lamp cover is square, and the edge of the lower bottom surface of the lamp cover is tightly attached to the top edge of the encapsulant.
In some embodiments, the light emitting chips include a red light chip, a green light chip, and a blue light chip, which are arranged in a linear arrangement.
The invention also provides an LED display system which comprises a plurality of LED display screens, wherein the isotropic LED lamp beads are arranged on the LED display screens.
The invention also provides a movie screen, which comprises an LED display screen, wherein the isotropic LED lamp beads are arranged on the LED display screen.
The beneficial effects of the invention are as follows: the invention discloses an isotropic LED lamp bead, which comprises a light emitting chip, a lamp bead bracket, an encapsulation colloid and a lampshade arranged above the encapsulation colloid. The quantity of the light emitting chips is a plurality of, and the light emitting chips are arranged above the lamp bead support and are electrically connected with the lamp bead support. The lamp pearl support sets up in the inside of encapsulation colloid. The inside of the packaging colloid and the upper part of the light-emitting chip are covered with a light-transmitting colloid, and the light-transmitting colloid is formed with a smooth cambered surface which is concave downwards. The lamp cover is covered on the upper part of the packaging colloid, and the lamp cover is provided with a convex light expansion part. The light-expanding part extends towards the direction far away from the packaging colloid, the inner surface of the light-expanding part is a smooth cambered surface, and a refraction cavity is formed between the inner surface of the light-expanding part and the upper surface of the light-transmitting colloid. The lampshade can change the original point light source of the lamp bead into a surface light source, and effectively enlarge the light-emitting angle under the conditions of not affecting the light-emitting brightness and not changing the size of the light-emitting chip. So that the color does not deviate when the lamp beads are viewed from all directions. The invention also discloses an LED display system and a movie screen, wherein the isotropic LED lamp beads are arranged above the LED display system and the movie screen. The reality of the environment simulation of the LED display system is effectively improved, and the film watching effect of the film screen is also improved.
Drawings
FIG. 1 is a front view of an isotropic LED light bead of the present invention;
FIG. 2 is a front cross-sectional view of an isotropic LED light bead of the present invention;
FIG. 3 is a top cross-sectional view of an isotropic LED light bead of the present invention;
FIG. 4 is a front cross-sectional view of another embodiment of a lamp housing of an isotropic LED lamp bead of the present invention;
FIG. 5 is a front cross-sectional view of another embodiment of a lamp housing of an isotropic LED lamp bead of the present invention;
FIG. 6 is a schematic illustration according to FIG. 2;
FIG. 7 is a perspective view of an LED display system according to the present invention;
fig. 8 is a front view of a prior art cinema screen.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
The invention provides an isotropic LED lamp bead, which can not generate color deviation when being observed from all directions.
As shown in fig. 1 to 3, as one embodiment of the isotropic LED lamp bead, the isotropic LED lamp bead includes a light emitting chip 2, a lamp bead holder 3, an encapsulation body 4, and a lamp cover 1 disposed over the encapsulation body 4.
The number of the light emitting chips 2 is plural. The light emitting chip 2 is arranged above the lamp bead bracket 3, and the light emitting chip 2 is electrically connected with the lamp bead bracket 3. The lamp bead bracket 3 is arranged in the packaging colloid 4. The inside of the packaging colloid 4 and the upper part of the light-emitting chip 2 are covered with a light-transmitting colloid 5, and the upper surface of the light-transmitting colloid 5 is higher than the upper surface of the light-emitting chip 2 in the height direction; the light-transmitting colloid 5 is formed with a smooth cambered surface recessed downward.
The lamp shade 1 is covered on the upper part of the packaging colloid 4, and the lamp shade 1 is provided with a convex light expansion part 11. The light-expanding part 11 extends towards the direction far away from the packaging colloid 4, the inner surface of the light-expanding part 11 is a smooth cambered surface, and a refraction cavity 8 is formed between the inner surface of the light-expanding part 11 and the upper surface of the light-transmitting colloid 5.
In the present embodiment, the number of the light emitting chips 2 is three. As shown in fig. 3, the light emitting chip 2 includes a red light chip, a green light chip, and a blue light chip, which are arranged in a linear manner. Of course, other arrangements of the three light emitting chips 2 are possible, for example in a delta-shaped arrangement, and the remaining arrangements are not shown in the figures. In this embodiment, the three light emitting chips 2 are preferably arranged linearly.
According to the isotropic LED lamp bead provided by the invention, the lampshade 1 is covered above the upper surface of the light-transmitting colloid 5, and the lampshade and the light-transmitting colloid are combined to form an air cavity, namely the refraction cavity 8. In the refraction cavity 8, the light source of the light emitting chip 2 can be changed from a point light source to a surface light source due to refraction of light. Therefore, when the lamp beads are displayed, the light-emitting angle is increased due to the change of the light path, the light-emitting colors of the lamp beads keep original color tones and cannot generate color temperature deviation, and the problem of color temperature drift in different scenes is effectively solved.
As shown in fig. 2 to 3, the light emitting chip 2 is disposed above the bead holder 3, and the light emitting chip 2 is electrically connected to the bead holder 3. The lamp bead bracket 3 is arranged in the packaging colloid 4.
Further, the bead holders 3 include anode holders 31 and cathode holders 32, and the number of the cathode holders 32 corresponds to the number of the light emitting chips 2; the bottom surface of the light emitting chip 2 is fixed on the upper surface of the anode bracket 31 through the conductive colloid 7, and a wire 6 is connected between the upper surface of the light emitting chip 2 and the cathode bracket 32.
In the present embodiment, the number of anode holders 31 is one, and the number of cathode holders 32 is three. Four lamp pearl supports 3 are fixed in the inside of encapsulation colloid 4, and the part of encapsulation colloid 4 is stretched out to four lamp pearl supports 3 is formed with four pins 33, and pin 33 is used for connecting the pad on the PCB board.
In the above case, the three light emitting chips 2 share the anode, and preferably, the three light emitting chips 2 may share the cathode. In this case (not shown), the number of anode holders corresponds to the number of light emitting chips 2; the bottom surface of the light-emitting chip 2 is fixed on the upper surface of the cathode bracket through conductive colloid 7, and a wire 6 is connected between the upper surface of the light-emitting chip 2 and the anode bracket. Correspondingly, the number of the cathode brackets is one, and the number of the anode brackets is three. Four lamp pearl supports 3 are fixed in the inside of encapsulation colloid 4, and the part of encapsulation colloid 4 is stretched out to four lamp pearl supports 3 is formed with four pins 33, and pin 33 is used for connecting the pad on the PCB board.
In this embodiment, further, the bottom surfaces of the three light emitting chips 2, red light chip, green light chip and blue light chip are respectively fixed on the anode bracket 31 by conductive adhesive 7. In this embodiment, the conductive paste 7 is silver paste. The silver colloid mainly plays roles of adhesion and conductivity.
Further, a wire 6 is connected between the upper surface of the light emitting chip 2 and the cathode holder 32. In the present embodiment, three light emitting chips 2 are connected to three cathode brackets 32 through three wires 6, respectively. The wire 6 may be a gold wire, a silver wire, a copper wire, or an alloy wire. In this embodiment, gold wires are preferable, and the gold wires have stable performance, can prevent oxidation, and can ensure stable contact between the cathode bracket 32 and the light emitting chip 2.
Further, as shown in fig. 2, the inside of the encapsulation colloid 4 and the upper side of the light emitting chip 2 are covered with a light-transmitting colloid 5, and the light-transmitting colloid 5 is formed with a smooth arc surface recessed downward.
In this embodiment, the encapsulant 4 and the transparent encapsulant 5 are both epoxy resin, and the main function of the epoxy resin is to protect the internal structure of the lamp bead, so that the lamp bead is formed, and meanwhile, the epoxy resin can slightly change the light-emitting color, the light-emitting brightness and the light-emitting angle of the lamp bead. The light-transmitting colloid 5 fills the inner cavity of the encapsulation colloid 4 and covers the periphery and the upper surface of each light-emitting chip 2, and the edge outline of the light-transmitting colloid 5 is flush with the top of the encapsulation colloid 4. The transparent colloid 5 is in a fluid state before solidification, the transparent colloid 5 is molded through a specific die, a required smooth cambered surface can be obtained after solidification, and the degree of downward sinking of the smooth cambered surface can be adjusted according to different dies.
As shown in fig. 2, further, the lamp cover 1 is covered over the encapsulant 4, and the lamp cover 1 has a protruding light-spreading portion 11. The light-expanding part 11 extends towards the direction far away from the packaging colloid 4, the inner surface of the light-expanding part 11 is a smooth cambered surface, and a refraction cavity 8 is formed between the inner surface of the light-expanding part 11 and the upper surface of the light-transmitting colloid 5.
With reference to fig. 2 and 3, the three light emitting chips 2 are mixed and then directed to the refraction cavity 8 due to refraction of light. In the refraction cavity 8, the light path is changed, the light emitting angle is increased, and the light source is changed into a surface light source from a point light source, so that the color of the lamp beads is not deviated when the lamp beads are watched from all directions.
In the present embodiment, the cross-sectional dimension of the light-expanding portion 11 gradually decreases in a direction away from the encapsulant 4. The light-spreading portion 11 has the smallest cross-sectional area at the portion farthest from the encapsulant 4.
Further, the shape of the lower bottom surface of the lampshade 1 is matched with the shape of the top edge of the packaging colloid 4.
In this embodiment, the top edge of the encapsulant 4 is square, the edge of the bottom surface of the lamp cover 1 is square, and the edge of the bottom surface of the lamp cover 1 is tightly attached to the top edge of the encapsulant 4.
Further, the lamp shade 1 is made of transparent material, and the transparent lamp shade 1 does not influence the luminous color of the lamp beads. In some embodiments, the transparent material may be an epoxy. The epoxy resin plays a role of an optical lens, and the epoxy resin is made into the lampshade 1, so that the light emitting angle of the LED lamp beads can be controlled. The epoxy resin can also improve the light extraction efficiency and reduce the total reflection of light.
As shown in fig. 2, the light-diffusing part 11 includes a first arc surface 111 and a second arc surface 112, and a horizontal plane where a portion of the first arc surface 111 and the light-transmitting colloid 5 are in contact is a reference plane 81.
In the present embodiment, the vertical distance L1 from the arc surface vertex of the first arc surface 111 to the reference plane 81 is equal to the vertical distance L2 from the arc surface vertex of the upper surface 51 of the light-transmitting colloid 5 to the reference plane 81, that is, l1=l2. In this case, the isotropic LED beads may form a kind of light emitting angle.
As shown in fig. 4, in some embodiments, the vertical distance L1 from the arc apex of the first arc 111 to the reference plane 81 is smaller than the vertical distance L2 from the arc apex of the upper surface 51 of the light-transmitting colloid 5 to the reference plane 81, i.e., L1< L2. In this case, the isotropic LED beads may form another light emitting angle.
As shown in fig. 5, in some embodiments, the vertical distance L1 from the arc apex of the first arc 111 to the reference plane 81 is greater than the vertical distance L2 from the arc apex of the upper surface 51 of the light-transmitting colloid 5 to the reference plane 81, i.e., L1> L2. In this case, the isotropic LED beads may become a third light emitting angle again.
The change of the radian of the lampshade 1 corresponds to the change of the luminous angle of the lamp beads. The three conditions described above also represent three different light emission angles of the lamp beads. It should be noted that the above three variations are merely examples of the present invention, and other variations of the lampshade 1 may be calculated according to the following formulas according to the use requirement.
As shown in fig. 6, according to the geometrical optics theory, the structural parameters of the lamp shade 1: the following relation is satisfied among the contact angle theta, the focal length f, the outer diameter D, the curvature radius R and the crown height H:
in n 0 Refractive index of air, n 1 The outer diameter D is equal to the encapsulation side length of the lamp bead, here, for the refractive index of the lamp envelope 1.
And the bottom edge dimension of the refraction cavity 8 is d, h is the height of the refraction cavity 8, and the three parts are as follows:
simultaneous availability:
the structure of the lamp shade 1 can be determined by the above parameter calculation.
As shown in fig. 7, the present invention further provides an LED display system 9, which includes a plurality of LED display screens, on which the isotropic LED lamp beads in the above embodiment are mounted.
In this embodiment, the LED display screens are three, including a left screen 91, a right screen 92, and a ground screen 93. The three display screens are spliced together to form an LED display system 9, thereby making a simple studio. When shooting in a film studio, the requirements on shooting effect are high, and besides meeting the conventional index, the requirements on higher specifications such as frame rate, color and the like are also required to be paid attention to. The isotropic LED beads in the above embodiments can meet these requirements. When the lamp bead provided by the invention is used for shooting a plurality of LED display screens, the LED display screens are shot from different directions under the same picture, and the picture colors of the plurality of display screens are consistent, so that the sense of reality of environmental simulation can be improved.
The invention also provides a movie screen, which comprises an LED display screen, wherein the LED display screen is provided with the isotropic LED lamp beads in the embodiment.
As shown in fig. 8, a cinema screen 10 is known in the art. In the field of movie display, there is a fixed requirement for resolution, so when an LED display screen is placed in a movie screen, the number of LED light beads is also fixed. With the change of the size of the screen, the distance between the lamp beads also changes, and due to the limited light emitting area of the lamp beads, when the distance between the lamp beads is too large, a dark area 101 as shown in the figure is generated, and when the screen is watched by eyes, the screen appears as black lines, namely mole patterns. This results in poor viewing effect. The isotropic LED lamp bead provided by the invention can just solve the problem. It is mounted in an LED display screen which is built into the movie screen 10. At this time, the light beads in the movie screen 10 are improved, and the light emitting area is effectively enlarged, so that the dark area 101 is reduced, that is, the moire is eliminated, thereby effectively improving the viewing effect.
Therefore, the invention discloses an isotropic LED lamp bead which comprises a light emitting chip, a lamp bead bracket, an encapsulation colloid and a lamp shade arranged above the encapsulation colloid. The quantity of the light emitting chips is a plurality of, and the light emitting chips are arranged above the lamp bead support and are electrically connected with the lamp bead support. The lamp pearl support sets up in the inside of encapsulation colloid. The inside of the packaging colloid and the upper part of the light-emitting chip are covered with a light-transmitting colloid, and the light-transmitting colloid is formed with a smooth cambered surface which is concave downwards. The lamp cover is covered on the upper part of the packaging colloid, and the lamp cover is provided with a convex light expansion part. The light-expanding part extends towards the direction far away from the packaging colloid, the inner surface of the light-expanding part is a smooth cambered surface, and a refraction cavity is formed between the inner surface of the light-expanding part and the upper surface of the light-transmitting colloid. The lampshade can change the original point light source of the lamp bead into a surface light source, and effectively enlarge the light-emitting angle under the conditions of not affecting the light-emitting brightness and not changing the size of the light-emitting chip. So that the color does not deviate when the lamp beads are viewed from all directions. The invention also discloses an LED display system and a movie screen, wherein the isotropic LED lamp beads are arranged above the LED display system and the movie screen. The reality of the environment simulation of the LED display system is effectively improved, and the film watching effect of the film screen is also improved.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The isotropic LED lamp bead is characterized by comprising a light emitting chip, a lamp bead bracket, an encapsulation colloid and a lampshade arranged above the encapsulation colloid;
the number of the light emitting chips is multiple, the light emitting chips are arranged above the lamp bead bracket, and the light emitting chips are electrically connected with the lamp bead bracket;
the lamp bead bracket is arranged in the packaging colloid;
a light-transmitting colloid is covered in the packaging colloid and above the light-emitting chip, and the light-transmitting colloid is formed with a smooth cambered surface which is concave downwards;
the lamp shade covers the top of closing the encapsulation colloid, the lamp shade has a convex light expansion portion, light expansion portion is kept away from in the direction of encapsulation colloid extends, light expansion portion's internal surface is smooth cambered surface, light expansion portion's internal surface with form the refracting cavity between the upper surface of printing opacity colloid.
2. The isotropic LED lamp bead according to claim 1, wherein the cross-sectional dimension of the light spreading portion gradually decreases in a direction away from the encapsulant.
3. The isotropic LED lamp bead of claim 2, wherein the lamp bead support comprises an anode support and a cathode support, the number of cathode supports corresponding to the number of light emitting chips; the bottom surface of the light-emitting chip is fixed on the upper surface of the anode bracket through conductive colloid, and a wire is connected between the upper surface of the light-emitting chip and the cathode bracket.
4. The isotropic LED lamp bead according to claim 3, wherein the light expansion portion comprises a first arc surface and a second arc surface, and a horizontal plane where a portion of the first arc surface and the light-transmitting glue body are in contact is a reference plane.
5. The isotropic LED lamp bead according to claim 4, wherein the vertical distance from the arc surface vertex of the first arc surface to the reference plane is equal to the vertical distance from the arc surface vertex of the upper surface of the light-transmitting colloid to the reference plane; or the vertical distance from the cambered surface top of the first cambered surface to the reference plane is smaller than the vertical distance from the cambered surface top of the upper surface of the light-transmitting colloid to the reference plane; or the vertical distance from the cambered surface top point of the first cambered surface to the reference plane is larger than the vertical distance from the cambered surface top point of the upper surface of the light-transmitting colloid to the reference plane.
6. The isotropic LED lamp bead according to claim 5, wherein the lamp shade is made of transparent material and the material of the lamp shade is epoxy resin.
7. The isotropic LED lamp bead according to claim 6, wherein the shape of the encapsulant top edge is square, the edge of the lower bottom surface of the lamp housing is square, and the lower bottom surface edge of the lamp housing is in close contact with the encapsulant top edge.
8. The isotropic LED lamp bead according to claim 1, wherein the light emitting chips comprise a red light chip, a green light chip, and a blue light chip, which are arranged linearly.
9. An LED display system comprising a plurality of LED display screens having the isotropic LED light beads of any one of claims 1 to 8 mounted thereon.
10. A cinema screen comprising an LED display screen on which is mounted an isotropic LED light bead as claimed in any one of claims 1 to 8.
CN202310919974.9A 2023-07-24 2023-07-24 Isotropic LED lamp bead, LED display system and movie screen Pending CN116884962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310919974.9A CN116884962A (en) 2023-07-24 2023-07-24 Isotropic LED lamp bead, LED display system and movie screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310919974.9A CN116884962A (en) 2023-07-24 2023-07-24 Isotropic LED lamp bead, LED display system and movie screen

Publications (1)

Publication Number Publication Date
CN116884962A true CN116884962A (en) 2023-10-13

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ID=88254736

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Application Number Title Priority Date Filing Date
CN202310919974.9A Pending CN116884962A (en) 2023-07-24 2023-07-24 Isotropic LED lamp bead, LED display system and movie screen

Country Status (1)

Country Link
CN (1) CN116884962A (en)

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