WO2019148777A1

WO2019148777A1 - Led display module and led display screen

Info

Publication number: WO2019148777A1
Application number: PCT/CN2018/095884
Authority: WO
Inventors: 何昆鹏; 吴振志; 吴涵渠
Original assignee: 深圳市奥拓电子股份有限公司
Priority date: 2018-02-02
Filing date: 2018-07-17
Publication date: 2019-08-08
Also published as: CN108564891A

Abstract

An LED display module (10) and an LED display screen (20), the LED display module (10) comprising: a substrate (110) comprising a first end face (110a) and a second end face (110b) provided opposite to each other; at least one light-emitting unit (120) provided on the first end face (110a); at least one driving chip set (130), provided on the second end face (110b), electrically connected to the light-emitting unit (120), and used for driving the light-emitting unit (120) to emit light; a first conductive sheet (140) provided on the substrate (110), each light-emitting unit (120) being correspondingly provided with a first conductive sheet (140); a second conductive sheet (150) provided on the substrate (110), the first conductive sheet (140) and the second conductive sheet (150) being spaced apart, and the second conductive sheet (150) being connected to a ground of power supply when connected to a circuit; and a touch chip set (160) provided on the second end face (110b) of the substrate (110) and having an input end connected to the first conductive sheet (140). A first capacitance is formed between each first conductive sheet (140) and the second conductive sheet (150), so that when the human body touches a corresponding region of the LED display module (10), a change of the first capacitance of the corresponding region is caused, completing positioning of the light-emitting unit (120).

Description

LED display module and LED display

Technical field

The present invention relates to the field of display technologies, and in particular, to an LED display module and an LED display.

Background technique

In recent years, LED display technology has developed rapidly, and products are increasingly developing in the direction of high resolution, such as high density and small pitch. With the rapid growth of small-pitch LED display products, small-pitch LED display technology is also constantly improving. More and more LED displays are used in command centers, conference rooms, multimedia classrooms, etc. The demand for functionality is also growing.

The traditional touch method on the LED display is an infrared emission receiving tubular touch frame, which blocks the infrared radiation receiving and receiving path of the infrared touch frame by the touch object, thereby locating the position of the touch object. However, the method of implementing touch by infrared is easily interfered by light, has low precision, and is difficult to apply to a large-sized LED display screen, and the experience is poor when the size of the display exceeds 150 。.

technical problem

Based on this, it is necessary to provide an LED display module and an LED display screen for the touch realization problem of the LED display.

Technical solution

A first aspect of the present invention provides an LED display module, including:

a substrate comprising opposite first and second end faces;

At least one light emitting unit disposed on the first end surface;

At least one driving chip set is disposed on the second end surface and electrically connected to the light emitting unit for driving the light emitting unit to emit light;

a first conductive sheet is disposed on the substrate, and each of the light emitting units is correspondingly disposed with a first conductive sheet;

a second conductive sheet disposed on the substrate, wherein the first conductive sheet is spaced apart from the second conductive sheet, and the second conductive sheet is connected to a power ground when connected to the circuit;

The touch chip set is disposed on the second end surface of the substrate, and the input end is connected to the first conductive sheet.

In one embodiment, the first conductive sheet and the second conductive sheet are metal sheets.

In one embodiment, the light emitting units are arranged on the first end surface to form a matrix of light emitting units, the first conductive sheet is disposed between two light emitting units of each column, and the second conductive sheet is disposed on Between two rows of light emitting units, each row of light emitting units is separated from each other by the second conductive sheet, and the second conductive sheet is connected to a power ground such that each of the first conductive sheets and the second conductive sheet adjacent thereto A first capacitor is formed between them.

In one embodiment, the first conductive sheet and the second conductive sheet are directly formed on the substrate; or are fixed on the substrate.

In one embodiment, the method further includes an encapsulation layer formed on the first end surface, the encapsulation layer encapsulating the light emitting unit, the first conductive sheet and the second conductive sheet on the substrate .

In one embodiment, the encapsulation layer includes an encapsulant layer and a photochromic layer, and the photochromic layer encapsulates the light emitting unit, the first conductive sheet, and the second conductive sheet in the first An end surface is disposed on the light color adjustment layer to form a seal on the light color adjustment layer.

In one embodiment, the phosphor color adjustment layer is mixed with a phosphor, and the phosphor is uniformly distributed in the photochromic layer.

In one embodiment, the refractive index of the light color adjustment layer is greater than the refractive index of the air, and an isolation trench is formed on the end surface of the light color adjustment layer that is adjacent to the light emitting unit on the end surface of the light color adjustment layer. The isolation slots are correspondingly disposed between two adjacent light emitting units.

In one embodiment, the isolation trench is filled with a reflective medium, and the reflective medium has a refractive index smaller than a refractive index of the photochromic adjustment layer.

The LED display module is configured to connect the first conductive piece and the second conductive piece spaced apart from each other, the first conductive piece is connected to the input pin of the touch chip set, and the second conductive piece is connected to the power ground, and in each of the first conductive pieces A first capacitor is formed between the second conductive sheets, so that when the human body touches the corresponding area of the LED display module, the first capacitance of the corresponding area is changed, and the positioning of the light emitting unit is completed.

A second aspect of the present invention provides an LED display panel comprising a plurality of LED display modules, wherein the LED display modules are connected by a splicing structure to achieve splicing, or are fixed on a bracket to achieve splicing, and the LED display module The group is the LED display module of any of the above.

Beneficial effect

The LED display screen is provided with a first conductive piece and a second conductive piece spaced apart from each other, the first conductive piece is connected to the input pin of the touch chip set, and the second conductive piece is connected to the power ground, in each of the first conductive piece and the first conductive piece A first capacitor is formed between the two conductive sheets, so that when the human body touches the corresponding area of the LED display module, the first capacitance of the corresponding area is changed, and the positioning of the light emitting unit is completed.

DRAWINGS

1 is a cross-sectional structural view of an LED display module according to an embodiment of the invention;

2 is a top plan view of an LED display module according to an embodiment of the invention;

3 is a cross-sectional structural view of an LED display module according to still another embodiment of the present invention;

4 is a cross-sectional structural view of an LED display module according to still another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an LED display screen according to an embodiment of the present invention.

Embodiments of the invention

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

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, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 and FIG. 2 , an LED display module 10 according to an embodiment of the present invention includes a substrate 110 , at least one light emitting unit 120 , at least one driving chip set 130 , a first conductive sheet 140 , and a second conductive sheet 150 . a touch chipset 160, the driving chipset 130 is disposed corresponding to the light emitting unit 120, and is configured to drive the light emitting unit 120 to emit light, and the light emitting unit 120 and the driving chipset 130 are electrically connected to each other, and are respectively disposed on the The first conductive sheet 140 and the second conductive sheet 150 are disposed on the substrate 110 on two opposite end faces of the substrate 110, and the touch chip set 160 is disposed on the substrate 110 facing away from the One side of the light emitting unit 120 is configured to cooperate with the first conductive sheet 140 and the second conductive sheet 150 to implement a touch function of the LED display module.

The substrate 110 includes a first end surface 110a and a second end surface 110b. The first end surface 110a is opposite to the second end surface 110b. The light emitting unit 120 is disposed on the first end surface 110a. The group 130 is disposed on the second end surface 110b. In some embodiments, the first end surface 110a is provided with a pad (not shown), the pad is provided with a plurality of, and the plurality of the pads are arranged in a matrix, and the light emitting unit 120 is disposed. Forming a matrix of light emitting units 120 on the pad and on the first end surface 110a.

The light emitting unit 120 includes at least one of a red light chip (R chip), a green light chip (G chip), and a blue light chip (B chip). In some embodiments, the LED display module is a full color module, and the light emitting unit 120 includes a red light chip, a green light chip, and a blue light chip.

In some embodiments, in order to realize the electrical connection between the light emitting unit 120 and the driving chip set 130, the light emitting unit 120 is disposed on the substrate 110 with a through hole (not shown) through which the wire passes. The terminals are respectively connected to the light emitting unit 120 and the driving chip set 130, thereby achieving electrical connection between the light emitting unit 120 and the driving chip set 130.

The first conductive sheet 140 and the second conductive sheet 150 are disposed on the first end surface 110a, and the first conductive sheet 140 is spaced apart from the second conductive sheet 150 to avoid the first conductive sheet. When the second conductive sheet 150 is connected to the circuit, the first conductive sheet 140 is connected to the input end of the touch chip set 160, and the second conductive sheet 150 is connected to the circuit. The first conductive sheet 140 and the second conductive sheet 150 are spaced apart from each other, so that the first conductive sheet 140 and the second conductive sheet 150 form a first capacitance at a time. When the human body touches the surface of the substrate 110 corresponding to the light emitting unit 120, another second capacitor is formed between the first conductive sheet 140 and the human body due to the grounding of the human body, and the first capacitor and the second capacitor are juxtaposed, thereby causing the first The change in the first capacitance between the conductive sheet 140 and the second conductive sheet 150, and thus the first conductive sheet 140, can be positioned to the corresponding light emitting unit 120.

In the embodiment shown in FIG. 2, the first conductive sheet 140 is formed in a rectangular sheet shape, and is disposed between the two light emitting units 120 of each column, and each of the light emitting units 120 is correspondingly disposed with a first conductive sheet 140. The second conductive sheet 150 is in the form of a long strip, and is disposed between the two rows of light emitting units 120. Each row of the light emitting units 120 is separated from each other by the second conductive sheet 150, and the second conductive sheet 150 is connected to the power source. Thus, a first capacitance is formed between each of the first conductive sheets 140 and a second conductive sheet 150 adjacent thereto. When the human body touches a certain area of the LED display module 10, it causes a change of the first capacitance of the corresponding area, so that the first conductive sheet 140 can be positioned, and then the corresponding conductive unit 120 is positioned according to the first conductive sheet 140. It should be noted that the rows and columns are opposite, only for the image shown in FIG. 2, and the LEDs are displayed in the display module 10 or the viewing angle is changed, and the rows and columns can be mutually converted. Meanwhile, the spacing between the light emitting units 120, the area covered by the first conductive sheet 140 and the second conductive sheet 140 on the first end surface 110a are also exemplary, for better structural illustration, in practical applications. The spacing between the light-emitting units 120 can be adjusted according to the requirements of the module resolution. The area occupied by the corresponding first conductive sheet 140 and the second conductive sheet 150 on the first end surface 110a can also be adjusted as needed.

It can be understood by those skilled in the art that the arrangement of the first conductive sheet 140 and the second conductive sheet 150 is not limited to the figure, and may be arranged according to the layout of the light emitting unit 120, as long as the first conductive sheet 140 is A first capacitance may be formed between the second conductive sheets 150. The first conductive sheet 140 and the second conductive sheet 150 may also be partially embedded or completely embedded in the substrate 110.

In some embodiments, the first conductive sheet 140 and the second conductive sheet 150 may be metal sheets, and the metal may be copper, iron, etc., of course, other metal materials may also be used, usually, in order to reduce Cost and light weight of the LED display module are usually made of materials that are lighter in weight, lower in price, and easily accessible. Of course, in other embodiments, the first conductive sheet 140 and the second conductive sheet 150 may also be made of a non-metal conductive material, as long as the first conductive sheet 140 and the second conductive portion can be A capacitor can be formed between the sheets 150.

The first conductive sheet 140 and the second conductive sheet 150 may be directly formed on the substrate 110, for example, formed on the substrate 110 by electroplating, or may be fixed to the substrate 110 after being formed in advance. The corresponding position on the top.

The first capacitor is formed between the first conductive sheet 140 and the second conductive sheet 150, so that when the human body touches, the change of the first capacitance is caused, the positioning of the corresponding light emitting unit 120 is realized, and the light output of the corresponding light emitting unit 120 is controlled. , you can achieve touch operation.

The touch chip set 160 is disposed on the second end surface 110b of the substrate 110, and the first conductive sheet 140 is connected to the input pin of the touch chip set 160. In some embodiments, a plurality of the first conductive sheets 140 are connected to input pins of the same touch chip set 160. Illustratively, the light emitting units 120 are arranged in a matrix on the substrate 110, each row or each The first conductive sheets 140 corresponding to the light emitting units 120 of the column are connected to the same touch chip set 160. Of course, in other embodiments, each of the first conductive sheets 140 may be correspondingly provided with an input pin of the touch chip set 160 and a plurality of first conductive sheets connected to the input pins of each touch chip set 160. 140 may also not be in the same row or in the same column.

In some embodiments, the LED display module further includes an encapsulation layer 170 formed on the first end surface 110a, and the encapsulation layer 170 encapsulates the illumination unit 120, the first conductive sheet 140, and the second conductive sheet 150. On the substrate 110. By providing the encapsulation layer 170, the illumination unit 120 can be isolated from the external environment, thereby preventing the illumination unit 120 from being damaged due to exposure.

The encapsulation layer 170 may be made of epoxy resin or silicone resin, and may be selected according to the actual production needs of the product.

In an embodiment, the encapsulation layer 170 includes an encapsulation layer 171 and a light color adjustment layer 173, and the light color adjustment layer 173 is the light emitting unit 120, the first conductive sheet 140, and the second conductive sheet. The encapsulation layer 170 is disposed on the light color adjustment layer 173 to form a seal on the light color adjustment layer 173.

Phosphors are mixed in the light color adjustment layer 173, and the phosphors are evenly distributed in the light color mixing layer, and the specific mixing ratio of the phosphors and the glue depends on the light emitting effect. When the light emitted from the light-emitting unit 120 passes through the light color adjustment layer 173, it is scattered by the phosphor, uniformly enters the encapsulant layer 171, and is emitted from the encapsulant layer 171, and the light uniformity is good.

With reference to FIG. 3 , in some embodiments, the refractive index of the light color adjustment layer 173 is greater than the refractive index of the air, and the light color adjustment layer 173 is adjacent to the end surface of the encapsulant layer 171 toward the light emitting unit 120 . The direction sinking is formed with an isolation groove 1731, and the isolation groove 1731 is correspondingly disposed between the adjacent two light emitting units 120. By providing the isolation trenches 1731, most of the light emitted by each of the light-emitting units 120 in the direction of the isolation trenches 1731 is totally reflected, on the one hand, the mutual interference between the two adjacent light-emitting units 120 is reduced, and On the one hand, the uniformity of the light emitted by the individual light-emitting units 120 before entering the encapsulant layer 171 is further enhanced. The depth of the isolation trench 1731 is less than or equal to the thickness of the light color adjustment layer 173.

Referring to FIG. 4 , in some embodiments, the isolation trench 1731 is filled with a reflective medium, and the reflective medium has a refractive index smaller than a refractive index of the photochromic adjustment layer 173 .

The LED display module 10 is configured by connecting the first conductive sheet 140 and the second conductive sheet 150 that are spaced apart from each other. The first conductive sheet 140 is connected to the input pin of the touch chip set 160, and the second conductive sheet 150 is connected to the power ground. A first capacitor is formed between the first conductive sheet 140 and the second conductive sheet 150, so that when the human body touches the corresponding area of the LED display module, the first capacitor of the corresponding area is changed, and the positioning of the light emitting unit 120 is completed. .

Referring to FIG. 3, an embodiment of the present invention further provides an LED display screen, where the LED display screen includes a plurality of LED display modules 10, and the plurality of LED display modules 10 are spliced to form a large display screen. The LED display module 10 is the LED display module 10 according to any of the above embodiments. The LED display modules 10 can be connected by a splicing structure to achieve splicing, or can be fixed on a bracket to achieve splicing.

In the LED display screen, the first conductive sheet 140 is connected to the input pin of the touch chip set 160, and the second conductive sheet 150 is connected to the power ground, in each of the first conductive sheets 140 and the second conductive sheet 150. A first capacitor is formed between the conductive sheet 140 and the second conductive sheet 150, so that when the human body touches the corresponding area of the LED display module, the first capacitance of the corresponding area is changed, and the positioning of the light emitting unit 120 is completed.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An LED display module, comprising:

a substrate comprising opposite first and second end faces;

At least one light emitting unit disposed on the first end surface;

At least one driving chip set disposed on the second end surface and electrically connected to the light emitting unit for driving the light emitting unit to emit light;

a first conductive sheet is disposed on the substrate, and each of the light emitting units is correspondingly disposed with a first conductive sheet;

a second conductive sheet disposed on the substrate, wherein the first conductive sheet is spaced apart from the second conductive sheet, and the second conductive sheet is connected to a power ground when connected to the circuit;

The touch chip set is disposed on the second end surface of the substrate, and the input end is connected to the first conductive sheet.
The LED display module according to claim 1, wherein the first conductive sheet and the second conductive sheet are metal sheets.
The LED display module according to claim 1, wherein the light emitting unit is arranged on the first end surface to form a matrix of light emitting units, and the first conductive sheet is disposed on two of the light emitting units in each column. The second conductive sheet is disposed between the two rows of the light emitting units, and each row of the light emitting units is separated from each other by the second conductive sheet, and each of the first conductive sheets is adjacent to the first conductive sheet. A first capacitor is formed between the second conductive sheets.
The LED display module according to claim 1, wherein the first conductive sheet and the second conductive sheet are directly formed on the substrate; or are fixed on the substrate.
The LED display module of claim 1 , further comprising an encapsulation layer formed on the first end surface, the encapsulation layer to the light emitting unit, the first conductive sheet, and the first Two conductive sheets are packaged on the substrate.
The LED display module of claim 5, wherein the encapsulation layer comprises an encapsulant layer and a photochromic layer, the photochromic layer to the light emitting unit, the first conductive sheet, and the The second conductive sheet is encapsulated on the first end surface, and the encapsulation layer is disposed on the light color adjustment layer to form a seal on the light color adjustment layer.
The LED display module according to claim 6, wherein the phosphor color adjusting layer is mixed with a phosphor, and the phosphor is uniformly distributed in the photochromic layer.
The LED display module according to claim 6, wherein the refractive index of the light color adjustment layer is greater than the refractive index of the air, and the end of the light color adjustment layer adjacent to the encapsulant layer is An isolation trench is formed in the direction in which the light emitting unit is sunk, and the isolation trench is correspondingly disposed between the adjacent two of the light emitting units.
The LED display module according to claim 8, wherein the isolation trench is filled with a reflective medium, and the reflective medium has a refractive index smaller than a refractive index of the photochromic adjustment layer.
An LED display screen, comprising: a plurality of LED display modules, wherein the LED display modules are connected by a splicing structure to achieve splicing, or fixed on a bracket for splicing, wherein the LED display module is The LED display module of any of claims 1-9.