CN111161640B

CN111161640B - Assembled LED display panel

Info

Publication number: CN111161640B
Application number: CN201811321372.9A
Authority: CN
Inventors: 历志辉
Original assignee: Shenzhen TCL New Technology Co Ltd
Current assignee: Shenzhen TCL New Technology Co Ltd
Priority date: 2018-11-07
Filing date: 2018-11-07
Publication date: 2022-01-04
Anticipated expiration: 2038-11-07
Also published as: CN111161640A

Abstract

The invention discloses an assembled LED display panel, comprising: three transparent substrates arranged in a stacked manner; the first LED, the second LED and the third LED are respectively arranged on the three transparent substrates; the LEDs on any one transparent substrate are arranged in a staggered manner with the LEDs on other transparent substrates; a light shielding layer disposed on the back surfaces of the first and second LEDs, a support member disposed between the transparent substrates; the second LED and the third LED are LEDs with the size larger than 100 mu m, the first LED is the LED closest to the display picture, and the second LED and the third LED are LEDs with the size smaller than 100 mu m. The three-color LEDs are respectively assembled on the three transparent substrates, the three-color LEDs can be transferred simultaneously during mass transfer, the transfer time is effectively shortened, the production efficiency is improved, in addition, the Micro-LED display can be realized without completely using pixels with the diameter of less than 100 micrometers, and the display effect is optimized.

Description

Assembled LED display panel

Technical Field

The invention relates to the technical field of LED display, in particular to an assembled LED display panel.

Background

At present, Mini-LED, Micro-LED and the like are generally concerned by the display market. The display panel is also continuously pursued to optimize the display effect, wherein the most important point is the improvement of PPI. Because a display panel with low PPI may cause a viewer to see graininess and lack of clarity, thereby affecting the viewing experience.

The existing LED display panel is manufactured by green, red and blue LEDs on one substrate, and the requirement on manufacturing precision is high due to dense wiring. Meanwhile, the massive transfer needs to transfer three-color LEDs respectively or package three or more LEDs into one pixel before transferring, which is tedious in process, takes a lot of time in the transfer process, prolongs the manufacturing period, and seriously affects the production efficiency.

Accordingly, the prior art is yet to be improved and developed.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide an assembled LED display panel, aiming at solving the problems that when the LED display panel in the prior art is transferred in a large amount, three colors need to be transferred respectively or three or several LEDs need to be packaged into one pixel before transferring, the process is complicated, the manufacturing period is prolonged, and the production efficiency is seriously affected.

The technical scheme adopted by the invention for solving the technical problem is as follows:

an assembled LED display panel, wherein the assembled LED display panel comprises: three transparent substrates arranged in a stacked manner;

the first LED, the second LED and the third LED are respectively arranged on the three transparent substrates; the first LED, the second LED and the third LED are LEDs respectively emitting light with three different colors of blue, red and green, a plurality of similar LEDs are arranged on each transparent substrate at intervals, and the LEDs on any one transparent substrate are arranged in a staggered manner with the LEDs on other transparent substrates;

a light shielding layer disposed on the back surfaces of the first LED and the second LED, the light shielding layer being configured to shield light emitted by the LEDs directly behind the first LED and the second LED;

a support member for preventing collision of adjacent transparent substrates is arranged between the transparent substrates;

the second LED and the third LED adopt LEDs with the size larger than 100 mu m, and the first LED is the LED closest to the display picture and adopts the LED with the size smaller than 100 mu m.

The assembled LED display panel is characterized in that the transparent substrate is made of glass or polyimide with light transmittance larger than 90%.

The assembled LED display panel is characterized in that the light shielding layer is made of resin or printing ink in a printing, exposure etching or impressing mode.

The assembled LED display panel is characterized in that the size of the second LED minus the size of the light shielding layer arranged on the back surface of the first LED is less than 100 mu m; and the size of the shading layer arranged on the back surface of the second LED is subtracted from the size of the third LED and is smaller than 100 um.

The assembled LED display panel, wherein the size of the light shielding layer is equal to the size of the corresponding LED on the light shielding layer.

The assembled LED display panel further comprises a protective cover plate arranged on the outer side of the first LED, and the protective cover plate is used for protecting the first LED from being abraded or collided; a support is also arranged between the protective cover plate and the transparent substrate.

The assembled LED display panel, wherein the first LEDs are replaced by LEDs with the size larger than 100 μm; and a protective cover plate is arranged on the outer side of the first LED, a light shielding layer is arranged on the protective cover plate, and the size of the first LED minus the size of the light shielding layer on the protective cover plate is smaller than 100 mu m.

The assembled LED display panel, wherein the first LEDs are replaced by LEDs with the size larger than 100 μm; a shading layer is arranged on the front surface of the first LED; the size of the first LED minus the size of the light shielding layer is less than 100 μm.

The invention has the beneficial effects that: in addition, the LED display panel can realize Micro-LED display without completely using pixels with the size of less than 100 microns, and is simple to manufacture and more optimized in display effect.

Drawings

Fig. 1 is a schematic structural diagram of a first preferred embodiment of an assembled LED display panel according to the present invention.

Fig. 2 is a display schematic diagram of the assembled LED display panel of the present invention.

FIG. 3 is a schematic structural diagram of a second preferred embodiment of an assembled LED display panel according to the present invention.

FIG. 4 is a schematic structural diagram of a third preferred embodiment of an assembled LED display panel according to the present invention.

Fig. 5 is a schematic structural diagram of a fourth preferred embodiment of an assembled LED display panel according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The LED display panel aims to solve the problems that three-color LEDs need to be respectively transferred or three or more LEDs are packaged into one pixel and then transferred when the LEDs are transferred in a large amount in the prior art, the process is complicated, the manufacturing period is prolonged, the production efficiency is seriously influenced and the like. The present invention provides an assembled LED display panel, as shown in fig. 1, the assembled LED display panel of the present invention includes: three transparent substrates 10 arranged in a stacked manner; a first LED110, a second LED120, and a third LED130 respectively disposed on the three transparent substrates 10; a light shielding layer 20 disposed on the back surfaces of the first LED110 and the second LED120, wherein the light shielding layer 20 is used for shielding the light emitted by the LEDs right behind the first LED110 and the second LED 120; a support 30 for preventing collision of adjacent transparent substrates is disposed between the transparent substrates 10. In the present embodiment, the first LED110, the second LED120, and the third LED130 respectively emit blue, red, and green LEDs, for example, the first LED110 is a blue LED, the second LED120 is a red LED, and the third LED130 is a green LED. In addition, in the present embodiment, the third LED130 and the second LED120 are LEDs with a size larger than 100 μm, and the first LED110 is an LED closest to the display screen and is an LED with a size smaller than 100 μm.

In addition, the LED display panel can realize Micro-LED display without completely using pixels with the size of less than 100 microns (only the blue LED130 adopts an LED with the size of less than 100 microns), and has simple manufacture and more optimized display effect.

Specifically, in the application, a plurality of LEDs are disposed at intervals on each transparent substrate 10, as shown in fig. 1, when viewed from right to left, first LEDs 110 are disposed at intervals on a first transparent substrate 10, second LEDs 120 are disposed at intervals on a second (middle layer) transparent substrate 10, third LEDs 130 are disposed at intervals on a third (innermost) transparent substrate 10, and the LEDs on any one transparent substrate 10 are disposed in a staggered manner from the LEDs on the other transparent substrates, for example, the second LEDs 120 on the second transparent substrate 10 are all staggered from the first LEDs 110 and the third LEDs 130. When the light is emitted, the first LEDs 110 emit light through the light emitting surface, the second LEDs 120 emit light through the light emitting surface, the second LEDs pass through the gaps between the first LEDs 110 to emit light after being blocked by the light shielding layer 20, and the third LEDs 130 pass through the gaps between the second LEDs 120 to emit light after being emitted light through the light emitting surface and being blocked by the light shielding layer 20, so that unmixed light can be better realized.

Preferably, in the present embodiment, the light shielding layer 20 is disposed on the back surfaces of the second LED120 (middle layer LED) and the first LED110 (outermost layer LED), and the light shielding layer 20 is used for shielding the light of the second LED120 and the LEDs of other colors right behind the first LED110 to prevent the occurrence of light mixing. Since the rear surface of the third LED130 has no LEDs of other colors, the light-shielding layer 20 does not need to be provided on the rear surface of the third LED 130.

Preferably, the transparent substrate 10 in this embodiment is made of glass or polyimide having a light transmittance of more than 90%. The light shielding layer 20 is made of resin or ink, and the light shielding layer 20 can be formed by printing, exposure etching, or embossing while preventing the occurrence of color mixing with light of LEDs of other colors directly behind the LED (the LED is an LED provided on the light shielding layer 20). The supporting member 30 is used to prevent collision between adjacent transparent substrates 10, and the supporting member 30 plays a role of assembly, so that the whole system constitutes a complete LED display panel.

In order to make the LED display panel in the present embodiment achieve the micro-LED display effect, the size of the second LED120 minus the size of the light shielding layer 20 disposed on the back of the first LED110 is further limited to be less than 100 μm in the present embodiment; the size of the third LED130 minus the size of the light-shielding layer 20 disposed on the back side of the second LED120 is less than 100 um. The size of the light shielding layer 20 is equal to the size of the corresponding LED on the light shielding layer 20, namely, the size of the light shielding layer 20 on the back of the second LED120 is equal to the size of the second LED120, and the size of the light shielding layer 20 on the back of the first LED110 is equal to the size of the first LED110, so that the imaging size of the LED display formed in this way is below 100 μm, and the micro-LED display effect is realized.

Specifically, the display principle of the LED display panel is as shown in fig. 2. As can be seen from fig. 2, since the light shielding layer 20 is disposed on the back surfaces of the second LED120 and the first LED110 in this embodiment, the light emitted by the third LED130 and the second LED120 is divided into two parts, the other part is absorbed by the light shielding layer 20 disposed on the back surfaces of the second LED120 and the first LED110 (as shown in fig. 2), the other part penetrates through the transparent substrate 10 to realize the display effect, and the light emitted by the first LED110 has no loss, so that the light emitted by the first LED110, the second LED120, and the third LED130 constitutes a complete pixel. Therefore, the LED display panel eliminates the non-display interval between the pixels, eliminates the granular sensation during picture display and greatly improves the display effect.

Preferably, the LED display panel in the present embodiment includes a protective cover 40 disposed outside the outermost LEDs (the first LEDs 110 in the present embodiment). The material of the protective cover plate 40 may be the same as that of the transparent substrate 10, and the protective cover plate 40 is used for protecting the first LED110 from being abraded or collided; a support 30 is also provided between the protective cover 40 and the transparent substrate 10 to prevent the transparent substrate 10 and the protective cover 40 from colliding with each other.

Of course, the protective cover 40 in this embodiment can be omitted, as shown in fig. 3, and in the embodiment that omits the protective cover 40, other structures are the same as those in the embodiment in fig. 1, and only the application scenarios are different. The embodiment of fig. 3 is applied in a relatively safe, damp, etc. environment, so that the protective cover 40 may be omitted.

Further, the present invention also provides an embodiment, as shown in fig. 4, in which the first LED110 in the embodiment of fig. 1 is replaced with an LED having a size greater than 100 μm. That is, in the present embodiment, the first LED110, the second LED120, and the third LED130 are all LEDs having a size larger than 100 μm, and therefore, pixels having a size of 100 μm or less (Micro-LED level) are not used at all in the present embodiment. In order to make the present embodiment possible to achieve the micro-LED display effect. The embodiment arranges the light shielding layer 20 on the protective cover plate 40 (also arranged on the outer side of the outermost LED (first LED 110)), and the size of the first LED110 minus the size of the light shielding layer 20 arranged on the protective cover plate 40 is less than 100 μm, so that the pixel size of the LED display is below 100um, and the micro-LED display effect is realized.

Similarly, the protective cover 40 in the embodiment of fig. 4 may be omitted, and as shown in fig. 5, in this embodiment, the first LED110 in the embodiment of fig. 1 is replaced with an LED having a size larger than 100 μm, and the light shielding layer 20 is also provided on the front surface of the outermost LED (first LED 110), and other structural features are the same as those in the embodiment of fig. 4. That is, in the present embodiment, the light shielding layer 20 is disposed on both the front surface and the back surface of the first LED110, and the size of the first LED110 minus the size of the light shielding layer 20 is smaller than 100 μm, so that the micro-LED display effect can be achieved. The embodiment in fig. 5 is applied to relatively safe environments without bumps, humidity and the like because the protective cover plate is not arranged.

It can be known from the above embodiments that the combined LED display panel of the present invention can realize Micro-LED display without using or not completely using pixels of less than 100 μm (Micro-LED level), simplify the manufacturing of Micro-LEDs, improve production efficiency, save manufacturing time, and obtain better display effect than the existing LED display panel.

It should be noted that the first LED110, the second LED120, and the third LED130 in the above embodiments may be configured as a blue LED, a red LED, and a green LED, and of course, other configurations are possible, and the invention is not limited thereto.

In summary, the present invention provides an assembled LED display panel, including: three transparent substrates arranged in a stacked manner; the first LED, the second LED and the third LED are respectively arranged on the three transparent substrates; the first LED, the second LED and the third LED are LEDs respectively emitting light with three different colors of blue, red and green, a plurality of similar LEDs are arranged on each transparent substrate at intervals, and the LEDs on any one transparent substrate are arranged in a staggered manner with the LEDs on other transparent substrates; a light shielding layer disposed on the back surfaces of the first LED and the second LED, the light shielding layer being configured to shield light emitted by the LEDs directly behind the first LED and the second LED; a support member for preventing collision of adjacent transparent substrates is arranged between the transparent substrates; the second LED and the third LED adopt LEDs with the size larger than 100 mu m and adopt LEDs with the size smaller than 100 mu m. The three-color LEDs are respectively assembled on the three transparent substrates, the three-color LEDs can be transferred simultaneously during mass transfer, the transfer time is effectively shortened, the production efficiency is improved, in addition, the Micro-LED display can be realized without completely using pixels with the diameter of less than 100 micrometers, and the display effect is optimized.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims

1. An assembled LED display panel, comprising: three transparent substrates arranged in a stacked manner;

the first LED, the second LED and the third LED are respectively arranged on the three transparent substrates; the first LED, the second LED and the third LED are LEDs respectively emitting light of three different colors, namely blue, red and green, the light emitted by the first LED, the second LED and the third LED0 form a complete pixel, a plurality of similar LEDs are arranged on each transparent substrate at intervals, and the LEDs on any one transparent substrate are arranged in a staggered manner with the LEDs on other transparent substrates;

2. The assembled LED display panel of claim 1, wherein the transparent substrate is made of glass or polyimide with a light transmittance of greater than 90%.

3. The assembled LED display panel of claim 1, wherein the light shielding layer is made of resin or ink and is printed, etched by exposure, or embossed.

4. The assembled LED display panel of claim 1, wherein the size of the second LEDs minus the size of the light-shielding layer disposed on the back side of the first LEDs is less than 100 μ ι η; and the size of the shading layer arranged on the back surface of the second LED is subtracted from the size of the third LED and is smaller than 100 um.

5. The assembled LED display panel of claim 1, wherein the size of the light shielding layer is equal to the size of the corresponding LED on the light shielding layer.

6. The assembled LED display panel of claim 1, further comprising a protective cover plate disposed outside the first LEDs, the protective cover plate being configured to protect the first LEDs from being worn or knocked; a support is also arranged between the protective cover plate and the transparent substrate.

7. The assembled LED display panel of claim 1, wherein the first LEDs are replaced with LEDs having a size greater than 100 μ ι η; and a protective cover plate is arranged on the outer side of the first LED, a light shielding layer is arranged on the protective cover plate, and the size of the first LED minus the size of the light shielding layer on the protective cover plate is smaller than 100 mu m.

8. The assembled LED display panel of claim 1, wherein the first LEDs are replaced with LEDs having a size greater than 100 μ ι η; a shading layer is arranged on the front surface of the first LED; the size of the first LED minus the size of the light shielding layer is less than 100 μm.