CN212365402U - Module and LED display screen - Google Patents

Abstract

The utility model discloses a module and LED display screen, module include two at least LED lamp pearls and lamp plate, its characterized in that, two at least LED lamp pearl spaced set up in on the lamp plate, be equipped with the support between two LED lamp pearls, be provided with the plane of reflection that is used for the reflection to follow the light that LED lamp pearl side or bottom surface sent on the support. The utility model discloses need not to increase the electric current or change the duty cycle when improving display screen luminance, and can effectively guarantee grey level and contrast.

Description

Module and LED display screen

Technical Field

The utility model relates to a display screen technical field especially relates to a module and LED display screen.

Background

Along with the development of industrial technology, the application field of the LED display screen is wider and wider, the requirements and the performance of the LED display screen are higher and higher, different requirements are particularly provided for the maximum brightness of the outdoor LED display screen, and the brightness of the LED display screen is required to be higher in the occasions with stronger ambient light. At present, two methods for adjusting the brightness of an LED display screen exist, one method is to increase the brightness of an LED by increasing the current of the LED, generally, the current of the LED allowing continuous operation is about 20 ma, the current of the LED and the brightness of the LED are in a curve relationship, when the current of the LED increases to a threshold value, the brightness of the LED may be saturated, and at this time, the brightness of the LED display screen cannot be further improved, thereby limiting the application environment of the LED display screen. The other method is to control the brightness of the LED display screen by adopting pulse width modulation, namely, the LED brightness is adjusted by PWM signals, the signal frequency is unchanged, the conducting time of the LED is changed by changing the high level time of the pulse, the LED brightness is brighter when the duty ratio is high, namely, the high level time is more than the low level time, and the LED brightness is adjusted to the maximum value when the duty ratio reaches the limit value. The methods for adjusting the brightness of the LED display screen are all related to current, the service life of the LED is directly influenced by overlarge current, and the problem of the brightness of the LED display screen cannot be fundamentally solved. Especially, the LED display screen based on COB technology encapsulation forms a pixel point by encapsulating chips of three colors of RGB on the lamp panel in a dispensing mode, and black silica gel is injected between the pixel points to increase contrast by a vacuum glue filling method, so that part of light is inevitably absorbed, and the brightness of the LED display screen is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the module and the LED display screen are provided, so that the brightness of the display screen is increased on the premise of not changing the current.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the utility model provides a module, includes two at least LED lamp pearls and lamp plate, two at least LED lamp pearl spaced set up in on the lamp plate, be equipped with the support between two LED lamp pearls, be provided with the plane of reflection that is used for the reflection to follow the light that LED lamp pearl side or bottom surface sent on the support.

Furthermore, the reflecting surfaces are two, one of the reflecting surfaces is used for reflecting light rays emitted by the LED lamp beads on one side of the support, the other of the reflecting surfaces is used for reflecting light rays emitted by the LED lamp beads on the other side, and the two reflecting surfaces are perpendicular to each other.

Further, the support is kept away from the one end of lamp plate is equipped with the recess, be equipped with the silica gel layer in the recess.

Further, the cross-sectional shape of the groove is arc.

Furthermore, an adhesive layer is arranged between the support and the lamp panel.

Further, a light guide layer is arranged around the LED lamp beads.

Furthermore, the bracket is made of PPA, and the color of the bracket is white.

Further, the LED lamp bead comprises LED chips with three colors of RGB.

Furthermore, a nanometer reflecting layer is arranged on the reflecting surface.

The utility model discloses another technical scheme do:

an LED display screen comprises the module.

The beneficial effects of the utility model reside in that: set up the support between the lamp pearl, and set up the plane of reflection on the support, the plane of reflection can reflect the light of following lamp pearl side or bottom and launch, and the light after the reflection can be followed and openly jetted out to reach the purpose that increases the luminance of LED display screen. The utility model discloses need not to increase the electric current or change the duty cycle when improving display screen luminance, and can effectively guarantee grey level and contrast.

Drawings

Fig. 1 is a schematic front structural view of a module according to a first embodiment of the present invention;

fig. 2 is a cross-sectional view of a module according to a first embodiment of the present invention;

fig. 3 is a partial cross-sectional view of a module according to a first embodiment of the present invention.

Description of reference numerals:

1. LED lamp beads; 2. a support; 21. a reflective surface; 3. a light guide layer; 4. a silica gel layer; 5. and a lamp panel.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The utility model discloses the most crucial design lies in: set up the support between the lamp pearl, and set up the plane of reflection on the support, the plane of reflection can reflect the light that launches from lamp pearl side or bottom, reaches the purpose that improves display screen luminance.

Referring to fig. 1 to 3, a module includes at least two LED lamp beads 1 and a lamp panel 5, the at least two LED lamp beads 1 are arranged on the lamp panel 5 at intervals, a support 2 is arranged between the two LED lamp beads 1, and a reflection surface 21 for reflecting light emitted from a side surface or a bottom surface of the LED lamp bead 1 is arranged on the support 2.

As can be seen from the above description, the present embodiment has the following beneficial effects: set up the support between the lamp pearl, and set up the plane of reflection on the support, the plane of reflection can reflect the light of following lamp pearl side or bottom and launch, and the light after the reflection can be followed and openly jetted out to reach the purpose that increases the luminance of LED display screen.

Furthermore, the number of the reflecting surfaces 21 is two, one of the reflecting surfaces 21 is used for reflecting light emitted by the LED lamp beads 1 on one side of the support 2, the other one of the reflecting surfaces 21 is used for reflecting light emitted by the LED lamp beads 1 on the other side, and the two reflecting surfaces 21 are perpendicular to each other.

As can be seen from the above description, when the two reflecting surfaces are perpendicular to each other, total reflection can be achieved.

Further, the support 2 is kept away from the one end of lamp plate 5 is equipped with the recess, be equipped with silica gel layer 4 in the recess.

As can be seen from the above description, carbon black may be added to the silica gel layer to increase contrast.

Further, the cross-sectional shape of the groove is arc.

Furthermore, an adhesive layer is arranged between the support 2 and the lamp panel 5.

As can be seen from the above description, the adhesive layer may be an epoxy adhesive or other types of adhesives.

Further, a light guide layer 3 is arranged around the LED lamp bead 1.

As can be seen from the above description, the light guide layer is made of a material with high light transmittance, such as epoxy resin.

Further, the material of the stent 2 is PPA (Polyphthalamide), and the color of the stent 2 is white.

As can be seen from the above description, the PPA has high temperature resistance, and can be well adapted to the high temperature environment of the display screen during operation.

Further, the LED lamp bead 1 comprises LED chips with three colors of RGB.

Further, a nanometer reflective layer is disposed on the reflective surface 21.

As can be seen from the above description, the effective reflectivity is high and the light loss is small by using the nano reflective material.

The utility model relates to another technical scheme do:

an LED display screen comprises the module.

Referring to fig. 1 to fig. 3, a first embodiment of the present invention is:

the utility model provides a LED display screen, includes the module, as shown in fig. 1 and fig. 2, the module includes LED lamp pearl 1 and lamp plate 5 of at least two, 1 spaced settings of at least two LED lamp pearls in on lamp plate 5, be equipped with support 2 between two LED lamp pearls 1, support 2 also sets up on lamp plate 5. LED lamp pearl 1 can adopt COB packaging technology to set up on lamp plate 5, and in this embodiment, LED lamp pearl 1 includes the LED chip of three kinds of colours of RGB, and the LED chip of three kinds of colours is brilliant on lamp plate 5 admittedly according to certain arrangement. Be equipped with leaded light layer 3 around LED lamp pearl 1, the material on leaded light layer 3 is epoxy. Leaded light layer 3 can pour into between the support 2 through the high accuracy point equipment of gluing to cover LED lamp pearl 1.

In this embodiment, be equipped with the adhesive linkage between support 2 and the lamp plate 5, the adhesive linkage can be epoxy glue, also can be the adhesive linkage of other materials etc.. Be equipped with on support 2 and be used for reflecting the plane of reflection 21 of the light that sends from LED lamp pearl 1 side or bottom surface, the shape of support 2 can set up as required. Preferably, the cross section of the bracket 2 is in the shape of an isosceles right triangle or an isosceles trapezoid. When the cross-sectional shape of support 2 was isosceles right triangle, the inclined plane of support 2 and lamp plate bonded together. When the cross section of the bracket 2 is in the shape of an isosceles trapezoid, one angle is 45 degrees, and the surface where the long edge of the bracket 2 is located is bonded with the lamp panel 5. The reflecting surfaces 21 are arranged on two right-angle surfaces or two waist surfaces of an isosceles trapezoid of the bracket 2. That is, the number of the reflecting surfaces 21 is two, one of the reflecting surfaces 21 is used for reflecting the light emitted by the LED lamp bead 1 on one side of the bracket 2, the other one of the reflecting surfaces 21 is used for reflecting the light emitted by the LED lamp bead 1 on the other side, and the two reflecting surfaces 21 are perpendicular to each other. The reflecting surface 21 is provided with the nanometer reflecting layer, the nanometer reflecting layer completely covers the reflecting surface 21, the reflectivity of the nanometer reflecting layer is high, and the light loss is small.

In this embodiment, the one end that lamp plate 5 was kept away from to support 2 is equipped with the recess, and the cross sectional shape of recess can set up as required, and is preferred, and the cross sectional shape of recess is the arc, and the size of recess can set up as required. Be equipped with silica gel layer 4 in the recess, but the addition carbon black is in order to improve the contrast in silica gel layer 4, and the content of carbon black can be adjusted as required. The silica gel layer 4 can be injected into the groove through high-precision dispensing equipment, so that the surface of the silica gel layer 4 is flush with the surface of the light guide layer 3. The material of the bracket 2 is preferably PPA, and the color of the bracket 2 is white.

As shown in fig. 3, when the light emitted from the side surface of the LED lamp bead 1 or the light reflected from the bottom of the LED lamp bead irradiates the side surface of the support 2, the total reflection occurs, and the reflected light is emitted from the light guide layer 3, thereby achieving the purpose of improving the brightness of the display screen. In the embodiment, the current or the duty ratio of the LED display screen does not need to be changed, and the gray scale and the contrast can be effectively ensured.

To sum up, the utility model provides a pair of LED display screen, its simple structure need not to change the electric current or the duty cycle of LED display screen and just can improve the luminance of display screen, can also effectively guarantee its grey scale and contrast.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a module, includes two at least LED lamp pearls and lamp plate, its characterized in that, two at least LED lamp pearl spaced set up in on the lamp plate, be equipped with the support between two LED lamp pearls, be provided with the plane of reflection that is used for the reflection to send from LED lamp pearl side or bottom surface on the support.

2. The module of claim 1, wherein the number of the reflecting surfaces is two, one of the reflecting surfaces is used for reflecting light emitted by the LED lamp beads on one side of the bracket, the other of the reflecting surfaces is used for reflecting light emitted by the LED lamp beads on the other side, and the two reflecting surfaces are perpendicular to each other.

3. The module of claim 1, wherein a groove is formed in one end, away from the lamp panel, of the support, and a silica gel layer is arranged in the groove.

4. The die set of claim 3, wherein the cross-sectional shape of the groove is arcuate.

5. The module of claim 1, wherein an adhesive layer is disposed between the bracket and the lamp panel.

6. The module of claim 1, wherein a light guide layer is disposed around the LED bead.

7. The module of claim 1, wherein the bracket is made of PPA and is white.

8. The module of claim 1, wherein the LED lamp bead comprises an LED chip of three colors of RGB.

9. The module of claim 1, wherein a nano reflective layer is disposed on the reflective surface.

10. An LED display screen comprising a module, characterized in that the module is according to any one of claims 1-9.

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