CN219696480U - LED display module and LED display screen - Google Patents

Abstract

The utility model provides an LED display module and an LED display screen, wherein the LED display screen comprises an LED display module, the LED display module comprises a substrate, a light emitting component and a light guide structure, the light emitting component is arranged on the first surface of the substrate, the light guide structure covers the light emitting component, and the light guide structure is used for converting light rays emitted by the light emitting component into light rays vertical to the first surface of the substrate and emitting the light rays outwards. The LED display module provided by the utility model adopts the light guide structure to convert the angle of light emitted by the light emitting component into the angle vertical to the first surface of the substrate, and then emits the light, so that the angle of emergent light is adjusted, and the brightness of an axial visual angle is improved; compared with the prior art, the LED display module has the advantages that the structure of the display module is reasonably designed, the problems that the display screen is strong in granular sensation and abnormal in large-view-angle display of the screen due to different inclination angles of the LED chips are effectively solved, the light path of emitted light is adjusted, the brightness of an axial view angle is improved, and the viewing effect is improved.

Description

LED display module and LED display screen

Technical Field

The utility model belongs to the technical field of display equipment, and particularly relates to an LED display module and an LED display screen.

Background

A light emitting diode, abbreviated as LED, is a light emitting device that emits light by energy released by recombination of electrons and holes. The LED can efficiently convert electric energy into light energy, the electro-optic conversion efficiency can exceed 50%, and the LED is the most widely applied artificial light source at present.

As a solid-state active luminous light source, the LED has the characteristics of high brightness, long service life, high response speed, environmental protection and the like, can be applied to products in multiple fields, such as general illumination, smart phones, medical devices, displays, automobiles and the like, and becomes an important component part of the products, so that the products can realize higher efficiency and durability, more compact volume and higher design flexibility.

Micro-nano fabrication refers to parts on the order of millimeters, micrometers, and nanometers, as well as design, machining, assembly, integration, and application techniques for components or systems made up of such parts. The combination of semiconductor micro-nano fabrication technology and LED technology has created new possibilities, with LEDs being reduced in size to the micrometer scale, which may be referred to as micro-light emitting diodes (Mini-LEDs). Mini-LEDs have many excellent characteristics and have many potential applications. One of the applications of Mini-LEDs is for manufacturing displays, which have higher brightness, resolution and color saturation, lower energy consumption, longer lifetime and faster response speed than current mainstream display technologies such as OLED and LCD.

However, when the Mini-LED panel is manufactured, the problems of strong granular sensation of a display screen, abnormal display of a large visual angle of the screen and the like are caused by different inclination angles of the LED chip in the packaging process, so that the watching effect is influenced.

Disclosure of Invention

Based on the above, the utility model aims to provide an LED display module, which solves the technical problems that in the prior art, when a Mini-LED panel is manufactured, the particle sense of a display screen is strong, the display of a large viewing angle of the screen is abnormal and the like due to different inclination angles of LED chips in the packaging process, and the viewing effect is influenced.

It is yet another object of the present utility model to provide an LED display screen.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a LED display module assembly, including base plate, luminous subassembly and light guide structure, luminous subassembly installs in the first surface of base plate, and light guide structure covers luminous subassembly, and light guide structure converts the light that luminous subassembly sent into the light of perpendicular to the first surface of base plate and outwards jets out.

Optionally, the light guiding structure comprises at least one prism; the light emitting assembly includes a plurality of light emitting units, and each prism covers at least one light emitting unit.

Optionally, the prism is pyramid-shaped;

and/or the light-emitting component comprises a plurality of pixels, one pixel is formed by a plurality of light-emitting units, and one prism correspondingly covers one pixel.

Optionally, the prism is a regular triangular pyramid or a regular quadrangular pyramid, the prism includes a bottom, and the light emitting component is located at the bottom of the prism.

Optionally, the apex angle of the prism is 80 ° -160 °.

Alternatively, the prism is an acrylate or epoxy member.

Optionally, the LED display module further includes a packaging layer that encapsulates the light guiding structure, the light emitting component, and the substrate together, where the packaging layer covers the light guiding structure.

Optionally, the encapsulation layer is black;

and/or the light transmittance of the encapsulation layer is 25% -70%.

Optionally, the encapsulation layer is an epoxy layer, a silicone layer, or an acrylic layer.

And an LED display screen comprising the LED display module.

The beneficial effects provided by the utility model are as follows:

1. the LED display module adopts the light guide structure to convert the angle of light emitted by the light emitting component into the angle vertical to the first surface of the substrate, and then emits the light, so that the angle of emergent light is adjusted, and the brightness of an axial visual angle is improved; compared with the prior art, the LED display module reasonably designs the structure of the display module, effectively solves the problems of strong granular sensation of a display screen and abnormal display of a large visual angle of the screen caused by different inclination angles of the LED chip, adjusts the light path of emitted light, improves the brightness of an axial visual angle and improves the watching effect;

2. the LED display screen comprises the LED display module, so that the screen display effect of the LED display screen is improved, and the viewing experience is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an LED display module according to an embodiment of the present utility model.

Wherein, each reference sign in the figure:

1. an LED display module;

10. a substrate;

20. a light emitting assembly;

21. a light emitting unit;

30. a light guiding structure;

31. a prism;

40. and an encapsulation layer.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1, an LED display module 1 according to an embodiment of the utility model will be described. The LED display module 1 includes a substrate 10, a light emitting component 20 and a light guiding structure 30, wherein the light emitting component 20 is mounted on a first surface of the substrate 10, the light guiding structure 30 covers the light emitting component 20, and the light guiding structure 30 converts light emitted by the light emitting component 20 into light perpendicular to the first surface of the substrate 10 and emits the light outwards.

The LED display module 1 of the embodiment of the present utility model adopts the light guiding structure 30 to convert the angle of the light emitted by the light emitting component 20 into the angle perpendicular to the surface of the substrate 10, and then emits the light, so as to adjust the angle of the emergent light and improve the brightness of the axial viewing angle.

Compared with the prior art, the LED display module 1 of the embodiment of the utility model reasonably designs the structure of the display module, effectively solves the problems of strong granular sensation of a display screen and abnormal display of a large visual angle of the screen caused by different inclination angles of the LED chip, adjusts the light path of emitted light, improves the brightness of an axial visual angle and improves the watching effect.

The base plate 10 provides mounting support for the light emitting assembly 20 and other components, enabling the LED display module 1 to be assembled together. In some embodiments of the present utility model, the substrate 10 may be a common substrate 10 for assembling LEDs, for example, may be a cup-shaped flat substrate 10 or a multi-layer circuit board substrate 10, and the multi-layer circuit board substrate 10 may be a multi-layer circuit board substrate 10 with a driving IC.

In the embodiment of the present utility model, one light emitting unit 21 is an LED chip, and the LED chip is one of a tin electrode chip or a gold electrode chip. The LED chip is configured as one or more combinations of a vertical chip, a front-mounted chip, or a flip-chip, and can change the light path of the emitted light through the light guiding structure 30.

It will be appreciated that the light emitting assembly 20 includes at least one light emitting unit 21 for providing a light source for the LED display module 1, and the light emitted by the light emitting unit 21 may be red light, blue light, green light or light of other colors. When the light emitting assembly 20 includes a plurality of light emitting units 21, the plurality of light emitting units 21 are distributed in an array, and each light emitting unit 21 may be used alone or the plurality of light emitting units 21 may be used in combination to adjust the color of emitted light so that illumination or display may be variously presented.

Optionally, the light emitting assembly includes a plurality of pixels, one pixel being constituted by a plurality of light emitting units. In some embodiments, one pixel includes three light emitting units 21, for example, one pixel is composed of one red light emitting unit 21, one blue light emitting unit 21, and one green light emitting unit 21.

In some embodiments of the present utility model, the light guiding structure 30 comprises at least one prism 31; when the light emitting assembly 20 includes a plurality of light emitting units 21, each prism 31 covers at least one light emitting unit 21. The light path of the light emitted from the light emitting unit 21 is changed by refraction of the prism 31, and the structural design is simple and the effect is excellent.

When assembled, in some embodiments, each prism 31 covers one light emitting unit 21, i.e., one prism 31 changes the light path of the emitted light of one light emitting unit 21. In some aspects, one prism 31 covers the plurality of light emitting units 21, i.e., one prism 31 simultaneously changes the light paths of the emitted light rays of the plurality of light emitting units 21.

When the light emitting assembly includes a plurality of pixels, one prism covers one pixel correspondingly, that is, one prism covers all light emitting units constituting one pixel to uniformly adjust light of one pixel point. Specifically, as shown in fig. 1, for example, one pixel is constituted by one red light emitting unit, one blue light emitting unit, and one green light emitting unit, one prism 31 covers the one red light emitting unit 21, one blue light emitting unit 21, and one green light emitting unit 21 at the same time.

It is understood that the structure of the prism 31 may be various shapes, as long as the prism 31 can convert the light angle of the emitted light of the light emitting unit 21 into the vertical substrate 10 to be emitted.

Alternatively, the prism 31 is a tapered structure, such as a cone, pyramid, irregular cone, or the like. The taper of the prism 31 includes a bottom and a side, the light emitting unit 21 is located at the bottom of the taper of the prism 31, the top of the taper of the prism 31 arches in a direction away from the substrate 10, the side of the taper of the prism 31 is a light emitting surface, and after passing through the prism 31, light emitted by the light emitting unit 21 is emitted from the taper side of the prism 31, so that the emitted light is emitted axially.

In some embodiments of the present utility model, the prism 31 is in a regular triangular pyramid shape or a regular quadrangular pyramid shape, the light emitting assembly 20 is located at the bottom of the prism 31, and the regular triangular pyramid and the regular quadrangular pyramid are easier to manufacture and facilitate design adjustment of the light exit angle.

Alternatively, the prism 31 has a vertex angle θ of 80 ° to 160 °, and the regular triangular pyramid prism 31 and the regular rectangular pyramid prism 31 in this vertex angle range are capable of converting light emitted from the light emitting unit 21 into light rays perpendicular to the substrate 10.

The prism 31 is a transparent component made of a polymer material, and the preparation of the prism 31 by using the polymer material mainly considers that the substrate 10 and the light-emitting component 20 cannot be damaged when the prism 31 is formed on the substrate 10, and can be formed by adopting technologies such as mould pressing, embossing, printing and the like.

In some embodiments, the polymer material used to prepare the prism 31 may be an acrylic or epoxy or a combination of both, and the acrylic and epoxy may have a low molding temperature, and may not damage the substrate 10 and the light emitting assembly 20 during molding, and may have an excellent light guiding effect.

In some embodiments of the present utility model, as shown in fig. 1, the LED display module 1 further includes an encapsulation layer 40 that encapsulates the light guiding structure 30, the light emitting component 20 and the substrate 10 together, and the encapsulation layer 40 covers the light guiding structure 30.

The traditional Mini-LED panel has the problems of strong particle sense of a display screen, abnormal display of a large visual angle of the screen and the like easily caused by different inclination angles of LED chips in the packaging process in the manufacturing process, and the defects of insufficient brightness, poor brightness uniformity and the like of an axial visual angle and the like caused by the fact that a single plane panel is generally adopted for packaging the Mini-LED, so that the viewing experience is further influenced.

The LED display module 1 of the embodiment of the present utility model combines the light guiding structure 30 and the encapsulation layer 40, the light emitted by the light emitting component 20 is converted into the light emitted outwards from the vertical substrate 10 through the light guiding structure 30, so as to improve the brightness of the axial viewing angle, the converted light is emitted outwards through the encapsulation layer 40, the encapsulation layer 40 has a diffusion effect, and the converted light of the light guiding structure 30 can be converted into a large-area uniform and soft surface light source, so that the effects of higher brightness, low power consumption, uniform brightness and uniform light color are achieved.

When the LED display module 1 is applied to a display device, the black screen brightness, white screen brightness and contrast of the display screen are important application parameters. It will be appreciated that when the LED display module 1 is applied as a display device, the encapsulation layer 40 appears as a display surface. In some embodiments of the present utility model, the encapsulation layer 40 is black, and the amount of light absorbed by the encapsulation layer 40 and the transmittance of the encapsulation layer 40 can be adjusted by the black color of the encapsulation layer 40, so that the display surface achieves the required black screen brightness, white screen brightness and contrast.

Optionally, the light transmittance of the encapsulation layer 40 is 25% -70%, and the light converted from the light guiding structure 30 can be emitted through the encapsulation layer 40, so that the display surface achieves better black screen brightness, white screen brightness and contrast.

Optionally, the encapsulation layer 40 is an epoxy resin layer, a silicone resin layer or an acrylic resin layer, that is, the encapsulation layer 40 may be made of an epoxy resin, a silicone resin or an acrylic resin material, which has light transmittance, excellent physical and mechanical properties, electrical insulation properties, adhesion properties with various materials and chemical resistance properties, and is easy to assemble.

In some embodiments, the light transmittance of the encapsulation layer 40 is adjusted by adding a black pigment to the material of the encapsulation layer 40, and controlling the black chromaticity of the encapsulation layer 40 by controlling the addition amount of the black pigment.

In the embodiment of the utility model, the preparation method of the LED display module 1 comprises the following steps:

s01: providing a multilayer circuit board substrate 10, printing solder paste on the multilayer circuit board substrate 10 in a printing mode, respectively fixing a plurality of LED chips with gold electrodes on the substrate 10 in a single-point die bonding mode to form an LED chip array, forming an LED pixel unit by every three LED chips, and realizing electric conduction through reflow soldering to obtain a first-order assembly.

S02: a regular rectangular pyramid prism 31 is formed on the substrate 10 at a position corresponding to each LED pixel unit by a molding process, so that each regular rectangular pyramid prism 31 covers the light emitting unit 21 of one LED pixel unit, resulting in a second order assembly.

S03: the encapsulation layer 40 is formed on the surface of the regular rectangular pyramid prism 31 by a molding process, resulting in a third order assembly.

S04: and placing the third-order component in an oven for heating and curing treatment to form a packaging layer 40, thereby obtaining the LED display module 1.

The embodiment of the utility model also provides an LED display screen, which comprises the LED display module 1, wherein the LED display module 1 solves the problems of strong granular sense and abnormal large-view-angle display of the screen caused by different inclination angles of LED chips, has high axial view-angle brightness, emits uniform and soft light, improves the screen display effect of the LED display screen, and improves the viewing experience.

Moreover, when the LED reality module 1 is packaged by the black packaging layer 40, the light quantity and the light transmittance absorbed by the display screen can be adjusted by the packaging layer 40, so that the LED display screen can achieve the required black screen brightness, white screen brightness and contrast.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. An LED display module, its characterized in that: the LED lamp comprises a substrate, a light emitting assembly and a light guide structure, wherein the light emitting assembly is arranged on the first surface of the substrate, the light guide structure covers the light emitting assembly, and the light guide structure converts light emitted by the light emitting assembly into light which is perpendicular to the first surface of the substrate and is emitted outwards.

2. The LED display module of claim 1, wherein: the light guide structure comprises at least one prism; the light emitting assembly comprises a plurality of light emitting units, and each prism covers at least one light emitting unit.

3. The LED display module of claim 2, wherein: the prism is in a pyramid shape;

and/or the light emitting component comprises a plurality of pixels, one pixel is formed by a plurality of light emitting units, and one prism correspondingly covers one pixel.

4. The LED display module of claim 3, wherein: the prism is regular triangular pyramid or regular quadrangular pyramid, the prism comprises a bottom, and the light emitting component is positioned at the bottom of the prism.

5. The LED display module of claim 4, wherein: the apex angle of the prism is 80-160 degrees.

6. The LED display module of any one of claims 2 to 5, wherein: the prism is an acrylic or epoxy part.

7. The LED display module of any one of claims 1 to 5, wherein: the LED display module further comprises an encapsulation layer encapsulating the light guide structure, the light emitting component and the substrate into a whole, and the encapsulation layer covers the light guide structure.

8. The LED display module of claim 7, wherein: the packaging layer is black; and/or, the light transmittance of the packaging layer is 25% -70%.

9. The LED display module of claim 7, wherein: the packaging layer is an epoxy resin layer, an organic silicon resin layer or an acrylic resin layer.

10. An LED display screen, characterized in that: an LED display module comprising any one of claims 1 to 9.