CN217485443U

CN217485443U - Flexible LED display screen

Info

Publication number: CN217485443U
Application number: CN202221530556.8U
Authority: CN
Inventors: 邵鹏睿
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-09-23
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a flexible LED display screen, including flexible film basement, first circuit structure, flexible insulating layer, second circuit structure, a plurality of LED chip and control circuit board. The first line structure is formed on a flexible film substrate. The flexible insulating layer is arranged on the flexible film substrate and covers the first circuit structure. The second line structure is formed on a side of the flexible insulating layer remote from the flexible film substrate. The plurality of LED chips are arranged on the flexible insulating layer, and electrodes of the plurality of LED chips are electrically connected with the first circuit structure and the second circuit structure. The flexible packaging layer covers the LED chips and the second circuit structure. The control circuit board is electrically connected with the first circuit structure and the second circuit structure so as to control the work of the LED chips. The utility model discloses a LED chip is direct to be connected with circuit structure, need not solitary supporting structure, and LED display screen structure is more frivolous.

Description

Flexible LED display screen

Technical Field

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

Background

The LED display screen is a display product which emits light by controlling the light emitting diodes, and is widely applied to the fields of outdoor advertisements, captions, stage background effects and the like because of the characteristics of high luminous efficiency, long service life, safety, reliability, environmental protection, energy conservation and the like.

The flexible LED display screen is an LED display screen which can be bent or combined into different shapes according to different purposes, and has the characteristics of light weight, thinness, transparency and the like. At present, a flexible LED display screen structure on the market is generally manufactured by adopting LED lamp beads, and the manufactured LED display screen is thicker and heavier due to larger support area of the LED lamp beads; meanwhile, the support of the LED lamp bead is of a non-transparent structure, so that the transparency of the LED display screen is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel flexible LED display screen.

In order to achieve the above objects, the present invention provides a flexible LED display screen, which comprises a flexible film substrate, a first circuit structure, a flexible insulating layer, a second circuit structure, a plurality of LED chips and a control circuit board. Wherein the first line structure is formed on the flexible film substrate. The flexible insulating layer is arranged on the flexible film substrate and covers the first circuit structure. The second circuit structure is formed on one side of the flexible insulating layer far away from the flexible film substrate. The LED chips are arranged on the flexible insulating layer, and electrodes of the LED chips are electrically connected with the first circuit structure and the second circuit structure. The flexible packaging layer covers the LED chips and the second circuit structure. The control circuit board is electrically connected with the first circuit structure and the second circuit structure to control the plurality of LED chips.

Preferably, the flexible insulating layer is provided with a plurality of through holes, and the first circuit structure is electrically connected with the electrodes of the plurality of LED chips through the plurality of through holes.

Preferably, the flexible insulating layer is far away from be equipped with a plurality of first pads on the one side of flexible film basement, a plurality of first pads do not with second circuit structure electricity is connected, a plurality of LED chips do not have with the electrode that second circuit structure electricity is connected respectively with a plurality of first pads electricity is connected, just a plurality of first pads extend respectively to a plurality of through-holes and electricity connect to first circuit structure.

Preferably, the flexible film substrate, the flexible insulating layer and the flexible packaging layer are all transparent structures.

Preferably, the flexible packaging layer is one of a polyurethane layer, a silicone layer and an epoxy resin layer.

Preferably, the control circuit board is arranged on one surface of the flexible film substrate far away from the flexible insulating layer.

Preferably, the LED chips include a plurality of red light chips, a plurality of green light chips, and a plurality of blue light chips, anodes of the red light chips, the green light chips, and the blue light chips are electrically connected to one of the first circuit structure and the second circuit structure, and cathodes of the red light chips, the green light chips, and the blue light chips are electrically connected to the other of the first circuit structure and the second circuit structure.

Preferably, a red light chip, a green light chip and a blue light chip form a pixel unit, and the red light chip, the green light chip and the blue light chip of each pixel unit are connected with a common anode or a common cathode.

Compared with the prior art, the utility model arranges the first circuit structure on the flexible film substrate, then covers the first circuit structure through the flexible insulating layer, arranges the second circuit structure on the surface of the flexible insulating layer far away from the flexible film substrate, arranges a plurality of LED chips on the flexible insulating layer, and the electrodes of the LED chips are electrically connected with the first circuit structure and the second circuit structure, isolates the first circuit structure and the second circuit structure through the flexible insulating layer, avoids the contact short circuit between the first circuit structure and the second circuit structure, realizes the corresponding electrical connection between the electrodes of the LED chips and the first circuit structure and the second circuit structure, arranges the control circuit board on the surface of the flexible film substrate far away from the flexible insulating layer, and electrically connects the control circuit board with the first circuit structure and the second circuit structure, thereby realizing the electrical connection between the control circuit board and the LED chips, and controls the operation of the LED chip. The utility model discloses a LED chip is direct to be connected with circuit structure, need not solitary supporting structure, and LED display screen structure is more frivolous.

Drawings

Fig. 1 is a schematic perspective view of a flexible LED display screen according to an embodiment of the present invention;

fig. 2 is a schematic plan view of a flexible LED display according to an embodiment of the present invention.

Detailed Description

To explain the contents, structural features, objects and effects of the present invention in detail, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "row direction", "column direction", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and thus, the present invention should not be construed as being limited to the protection of the present invention.

The following describes the technical solution of the embodiment of the present invention in detail:

referring to fig. 1 and 2, the present invention provides a flexible LED display screen 100, which includes a flexible film substrate 1, a first circuit structure 2, a flexible insulating layer 3, a second circuit structure 4, a plurality of LED chips 5, a flexible packaging layer 6 and a control circuit board 7. Wherein the first line structure 2 is formed on the flexible film substrate 1. The flexible insulating layer 3 is disposed on the flexible film substrate 1 and covers the first circuit structure 2. The second line structure 4 is formed on a side of the flexible insulating layer 3 remote from the flexible film substrate 1. The plurality of LED chips 5 are arranged on the flexible insulating layer 3, and electrodes of the plurality of LED chips 5 are electrically connected with the first circuit structure 2 and the second circuit structure 4. The flexible packaging layer 6 covers the LED chips 5 and the second circuit structure 4. The control circuit board 7 is arranged on one surface of the flexible film substrate 1 far away from the flexible insulating layer 3, and the control circuit board 7 is electrically connected with the first circuit structure 2 and the second circuit structure 4 so as to control the LED chips 5, for example, to control the LED chips 5 to be turned on and off; for another example, the light emission luminance of the LED chip 5 is controlled.

In one embodiment, the flexible insulating layer 3 is provided with a number of through holes, through which the electrical connection of the first line structure 2 to the electrodes of the number of LED chips 5 is achieved. By means of the arrangement of the through holes, the first circuit structure 2 is conveniently and electrically connected with the plurality of LED chips 5, so that the structure of the flexible LED display screen 100 is simpler and more compact.

In one embodiment, a plurality of first pads 8 are disposed on a surface of the flexible insulating layer 3 away from the flexible film substrate 1, the plurality of first pads 8 are not electrically connected to the second circuit structure 4, the plurality of LED chips 5 are not electrically connected to the second circuit structure 4, and the plurality of first pads 8 respectively extend to the plurality of through holes and are electrically connected to the first circuit structure 2, so that the plurality of LED chips 5 and the electrodes thereof can be electrically connected to the first circuit structure 2.

Through set up first pad 8 at flexible insulating layer 3, make LED chip 5 not have the electrode of being connected with second circuit structure 4 electricity and be connected with first pad 8 electricity to make first pad 8 extend to a plurality of through-holes respectively and be connected electrically to first circuit structure 2 and realize LED chip 5 and first circuit structure 2's electricity and be connected, simple structure easily realizes. For example, in one embodiment, the cathode of the LED chip 5 is electrically connected to the second wiring structure 4, the anode of the LED chip 5 is electrically connected to the corresponding first bonding pad 8, and the anode of the LED chip 5 is electrically connected to the first wiring structure 2 through the first bonding pad 8.

Of course, in other embodiments, the first circuit structure 2 and the plurality of LED chips 5 may be electrically connected by other means, for example, using a wire or the like, by making the wire cross the flexible insulating layer 3 and electrically connecting the two ends of the wire to the electrodes of the LED chips 5 and the first circuit structure 2, respectively.

In one embodiment, the flexible film substrate 1 is a transparent structure, and likewise, the flexible insulating layer 3 is a transparent structure, and the flexible encapsulating layer 6 is a transparent structure. By means of the design, the transparency of the flexible LED display screen 100 is better.

In one embodiment, the flexible encapsulation layer 6 is a silicone layer. In one embodiment, the flexible encapsulation layer 6 is an epoxy layer. In one embodiment, the flexible encapsulation layer 6 is a polyurethane layer. Of course, the flexible encapsulating layer 6 may be of other materials.

In one embodiment, the plurality of LED chips 5 includes a plurality of red light chips, a plurality of green light chips, and a plurality of blue light chips, anodes of the red light chips, the green light chips, and the blue light chips are electrically connected to one of the first circuit structure 2 and the second circuit structure 4, and cathodes of the red light chips, the green light chips, and the blue light chips are electrically connected to the other of the first circuit structure 2 and the second circuit structure 4. In one embodiment, the anodes of the red, green and blue chips are electrically connected to the first circuit structure 2, and the cathodes of the red, green and blue chips are electrically connected to the second circuit structure 4.

Specifically, the first circuit structure 2 may include a plurality of row-direction circuits extending along the row direction, and the row-direction circuits are electrically connected to the control circuit board 7; the second circuit structure 4 may include a plurality of column-direction circuits extending along the column direction, and the column-direction circuits are electrically connected to the control circuit board 7; the LED chips 5 can be arranged in a matrix form, the anodes of the LED chips 5 on the same row can be electrically connected with the same row-direction circuit in the first circuit structure 2, and the cathodes of the LED chips 5 on the same column can be electrically connected with the same column-direction circuit in the second circuit structure 4.

Further, in one embodiment, a red chip, a green chip and a blue chip form a pixel unit, and the red chip, the green chip and the blue chip of each pixel unit share an anode. Of course, in other embodiments, the red chip, the green chip and the blue chip of each pixel unit can be shared as a cathode.

The control circuit board 7 specifically includes what components, and how the electrical connection relationships of these components are to control the LED chip 5 to turn on, turn off, and the like, and controlling the luminance and the like of the LED chip 5 is prior art and is not described herein again. The control circuit board 7 and the first and second circuit structures 2 and 4 may be electrically connected through, for example, FPC cables.

The following describes a manufacturing process of the flexible LED display 100 by taking a specific embodiment as an example:

firstly, providing a flexible film substrate 1; then, a first circuit structure 2 is manufactured on the flexible film substrate 1; then, covering a flexible insulating layer 3 on the flexible film substrate 1 and the first circuit structure 2, and forming a plurality of through holes penetrating through the flexible insulating layer 3; then, a second circuit structure 4 and a plurality of first bonding pads 8 which are not electrically connected with the second circuit structure 4 are manufactured on one surface of the flexible insulating layer 3, which is far away from the flexible film substrate 1, and the first bonding pads 8 extend to corresponding through holes and are electrically connected with the first circuit structure 2; then, placing a plurality of LED chips 5 on one surface of the flexible film substrate 1 far away from the flexible insulating layer 3, electrically connecting the cathodes of the LED chips 5 with the second circuit structure 4, and electrically connecting the anodes of the LED chips 5 with the first bonding pads 8; then, covering a flexible packaging layer 6 on the plurality of LED chips 5 and the second circuit structure 4; finally, a control circuit board 7 is arranged on one surface of the flexible film substrate 1 far away from the flexible insulating layer 3, and the control circuit board 7 is electrically connected with the first circuit structure 2 and the second circuit structure 4, so that the control circuit board 7 is electrically connected with the LED chips 5, and the control circuit board 7 controls the LED chips 5.

The flexible insulating layer 3 may be formed by plating the flexible film substrate 1 and the first circuit structure 2 by an evaporation method, forming a via pattern at a specific position by photolithography, and etching off an insulating material at the via position by etching to obtain a via.

To sum up, the utility model arranges the first circuit structure 2 on the flexible film substrate 1, then covers the first circuit structure 2 through the flexible insulating layer 3, arranges the second circuit structure 4 on the surface of the flexible insulating layer 3 away from the flexible film substrate 1, and arranges a plurality of LED chips 5 on the flexible insulating layer 3, and the electrodes of the LED chips 5 are electrically connected with the first circuit structure 2 and the second circuit structure 4, isolates the first circuit structure 2 and the second circuit structure 4 through the flexible insulating layer 3, avoids the contact short circuit of the first circuit structure 2 and the second circuit structure 4, realizes the corresponding electrical connection of the electrodes of the LED chips 5 with the first circuit structure 2 and the second circuit structure 4, and arranges the control circuit board 7 on the surface of the flexible film substrate 1 away from the flexible insulating layer 3, and electrically connects the control circuit board 7 with the first circuit structure 2 and the second circuit structure 4, thereby realizing the electric connection of the control circuit board 7 and the LED chip 5 and controlling the work of the LED chip 5. The utility model discloses a LED chip 5 is direct to be connected with circuit structure 2, 4, need not solitary supporting structure, and LED display screen 100 structures are more frivolous, and the transparency is better.

The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.

Claims

1. A flexible LED display screen, comprising:

a flexible film substrate;

a first circuit structure formed on the flexible film substrate;

the flexible insulating layer is arranged on the flexible film substrate and covers the first circuit structure;

the second circuit structure is formed on one surface, far away from the flexible film substrate, of the flexible insulating layer;

the LED chips are arranged on the flexible insulating layer, and electrodes of the LED chips are electrically connected with the first circuit structure and the second circuit structure;

the flexible packaging layer covers the LED chips and the second circuit structure; and

and the control circuit board is electrically connected with the first circuit structure and the second circuit structure so as to control the plurality of LED chips.

2. The flexible LED display screen of claim 1, wherein the flexible insulating layer is provided with a plurality of through holes, and the first circuit structure is electrically connected to the electrodes of the plurality of LED chips through the plurality of through holes.

3. The flexible LED display screen of claim 2, wherein a plurality of first pads are disposed on a side of the flexible insulating layer away from the flexible film substrate, the plurality of first pads are not electrically connected to the second circuit structure, the plurality of LED chips are not electrically connected to the second circuit structure, the plurality of first pads are electrically connected to the plurality of first pads, and the plurality of first pads extend to the plurality of vias and are electrically connected to the first circuit structure.

4. The flexible LED display screen of claim 1, wherein the flexible film substrate, the flexible insulating layer, and the flexible encapsulation layer are all transparent structures.

5. The flexible LED display of claim 1, wherein the flexible encapsulant layer is one of a polyurethane layer, a silicone layer, and an epoxy layer.

6. The flexible LED display screen of claim 1, wherein the control circuit board is disposed on a side of the flexible film substrate remote from the flexible insulating layer.

7. The flexible LED display screen of any one of claims 1 to 6, wherein the plurality of LED chips comprises a plurality of red LED chips, a plurality of green LED chips, and a plurality of blue LED chips, anodes of the red LED chips, the green LED chips, and the blue LED chips are electrically connected to one of the first and second circuit structures, and cathodes of the red LED chips, the green LED chips, and the blue LED chips are electrically connected to the other of the first and second circuit structures.

8. The flexible LED display screen of claim 7, wherein one of the red, green and blue dies forms a pixel unit, and the red, green and blue dies of each pixel unit are connected with a common anode or a common cathode.