WO2020048132A1

WO2020048132A1 - Split-type led display panel and control method thereof

Info

Publication number: WO2020048132A1
Application number: PCT/CN2019/082744
Authority: WO
Inventors: 历志辉; 刘树标
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2018-09-07
Filing date: 2019-04-15
Publication date: 2020-03-12
Also published as: CN110890028A; CN110890028B

Abstract

A split-type LED display panel and a control method thereof, wherein the split-type LED display panel comprises a first transparent substrate (10), a second transparent substrate (20) and a third transparent substrate (30) that are arranged in parallel; the first transparent substrate (10) is uniformly provided with a blue LED (B), a red LED (R) and a green LED (G) successively, the second transparent substrate (10) is uniformly provided with a red LED (R), a green LED (G) and a blue LED (B) successively, and the third transparent substrate (10) is uniformly provided with a green LED (G), a blue LED (B) and a red LED (R) successively; in the first transparent substrate (10), the second transparent substrate (20) and the third transparent substrate (30), a light-shielding layer (40) is provided on the bottom of an LED on the two transparent substrates (10, 20) provided near a light emergent side, and the size of the LED on the transparent substrate (10) closest to the light emergent side is less than 100um. The display panel can realize a micro-LED level display, and can also switch between different display modes according to different application scenarios, which can effectively solve the problem of a small visual angle in existing LED display panels.

Description

Split-type LED display panel and control method thereof

Technical field

The invention relates to the field of display panels, in particular to a split-type LED display panel and a control method thereof.

Background technique

At present, Mini-LED, Micro-LED, etc. have received widespread attention from the display market. Mini-LED and Micro-LED are still in the development phase, because the problem of massive transfer needs to be overcome. With the current technology, if one The 55-inch 4k * 2K display panel takes about three months.

Micro-LED refers to an LED display with a single pixel size of less than 100um. At present, the implementation of pixels is still under development, and no Micro-LED display panel has been released on the market.

At the same time, the display panel has been pursuing continuous optimization of display effects. The most important point is the improvement of PPI (the number of pixels per inch), because a display panel with a low PPI will make users see the grainy and unclear. Picture, which affects the viewing effect. The interval between the display pixels does not have a display effect, and the larger the interval pixel size, the more blurred and rough the picture looks, and the more obvious the graininess; and the existing display panel will lose some viewing angle, mainly because it is tilted. When the panel is viewed at a certain angle, the first substrate and the second substrate will block the display light of the third substrate, resulting in a smaller viewing angle.

Therefore, the existing technology needs to be improved and developed.

Summary of the Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a split type LED display panel and a control method thereof, which aim to solve the problems of poor display effect and small viewing angle of the existing LED display panel.

The technical solution of the present invention is as follows:

A split-type LED display panel includes a first transparent substrate, a second transparent substrate, and a third transparent substrate arranged side by side. The first transparent substrate is uniformly provided with blue, red, and green LEDs in sequence. Red, green, and blue LEDs are uniformly arranged in sequence on the second transparent substrate, and green, blue, and red LEDs are uniformly arranged in sequence on the third transparent substrate; the first transparent substrate, the second transparent substrate, and the third In the transparent substrate, the bottom of the LEDs on the two transparent substrates disposed near the light-emitting side are provided with a light-shielding layer, and the size of the LEDs on the transparent substrate closest to the light-emitting side is less than 100um.

In the split-type LED display panel, the material of the light-shielding layer is one of resin or ink.

In the split-type LED display panel, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, a LED on a transparent substrate closest to the light emitting side is further provided with a transparent protective cover.

In the split-type LED display panel, a support is provided between the first transparent substrate, the second transparent substrate, the third transparent substrate, and the transparent protective cover.

In the split-type LED display panel, materials of the first transparent substrate, the second transparent substrate, and the third transparent substrate are independently selected from one of glass or polyimide.

In the split-type LED display panel, a size of the light shielding layer is smaller than or equal to a size of the LED at a corresponding position.

In the split-type LED display panel, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, the size of the LED on the transparent substrate farthest from the light emitting side is less than 300um.

In the split-type LED display panel, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, the size of the LED on the transparent substrate in the middle position is less than 200um.

In the split-type LED display panel, in the first transparent substrate, the second transparent substrate, and the third transparent substrate, a distance between adjacent LEDs on the transparent substrate in the middle position is less than 100um.

A control method of a split type LED display panel, comprising the steps of:

When the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel, the pixel includes at least two red LEDs, at least two green LEDs, and at least two Two blue LEDs;

When the split-type LED display panel is used for small viewing angle display, different control signals are sent to LEDs of different colors in one pixel. The one pixel includes one red LED, one green LED, and one Blue LED.

The method for controlling a split-type LED display panel, wherein when the split-type LED display panel is used for large-viewing angle display, a large-viewing angle display effect is controlled by adjusting a driving current of a transparent substrate located at an intermediate position.

The method for controlling a split-type LED display panel, wherein when the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel, and the one pixel is also It can include three red LEDs, three green LEDs, and three blue LEDs.

The method for controlling a split-type LED display panel, wherein when the split-type LED display panel is used for a large viewing angle display, a control signal for turning off a transparent substrate farthest from the light-emitting side is turned off.

The control method of a split-type LED display panel, wherein when the split-type LED display panel is used for AR or VR display, different control signals are sent to LEDs of different colors in one pixel, the one pixel Including one LED, one green LED and one blue LED.

The method for controlling a split-type LED display panel, wherein when the split-type LED display panel is used for display in an auditorium or a conference room, the same control signal is sent to LEDs of the same color in one pixel, the one The pixel includes at least two red LEDs, at least two green LEDs, and at least two blue LEDs.

Beneficial effect: The split-type LED display panel provided by the present invention can realize Micro-LED level display without fully using small-sized (less than 100um) LEDs, and can also switch different display modes according to different application scenarios. In particular, it can be used for large viewing angle display scenes, which can effectively solve the problem of small viewing angles of existing LED display panels.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a split-type LED display panel according to a preferred embodiment of the present invention.

FIG. 2 is a flowchart of a preferred embodiment of a control method of a split-type LED display panel according to the present invention.

FIG. 3 is a schematic diagram of a split-type LED display panel according to the present invention in a small viewing angle display.

FIG. 4 is a schematic structural diagram when a single pixel in the split-type LED display panel of the present invention is composed of two red LEDs, two blue LEDs, and two green LEDs.

FIG. 5 is a schematic diagram when the split-type LED display panel shown in FIG. 4 is displayed at a large viewing angle.

FIG. 6 is a schematic structural diagram when a single pixel in the split-type LED display panel of the present invention is composed of three red LEDs, three blue LEDs, and three green LEDs.

FIG. 7 is a schematic diagram when the split-type LED display panel shown in FIG. 6 is in a large viewing angle display.

detailed description

The present invention provides a split-type LED display panel and a control method thereof. In order to make the purpose, technical solution, and effect of the present invention more clear and definite, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a split-type LED display panel according to a specific embodiment of the present invention. As shown in the figure, the split-type LED display panel includes a first transparent substrate 10, a first Two transparent substrates 20 and a third transparent substrate 30. Blue, red, and green LEDs are uniformly disposed on the first transparent substrate 10 in sequence, and red, green, and blue LEDs are uniformly disposed on the second transparent substrate 20 in sequence. The third transparent substrate 30 is provided with green, blue, and red LEDs uniformly in this order. Among the first transparent substrate 10, the second transparent substrate 20, and the third transparent substrate 30, two transparent ones are disposed near the light emitting side. The bottom of the LED on the substrate is provided with a light-shielding layer 40, and the size of the LED on a transparent substrate closest to the light exit side is less than 100um.

Preferably, in the present invention, the first transparent substrate, the second transparent substrate, and the third transparent substrate may be arranged side by side in any order. The three transparent substrates are arranged from left to right in a total of 6 arrangements, as For example, the first transparent substrate, the third transparent substrate, and the second transparent substrate are sequentially arranged from left to right; or the second transparent substrate, the third transparent substrate, and the first transparent substrate are sequentially arranged from left to right; or Arranged in order from left to right are a third transparent substrate, a second transparent substrate, and a first transparent substrate.

In the embodiment shown in FIG. 1, the order of the three transparent substrates from left to right is specifically: the third transparent substrate 30, the second transparent substrate 20, and the first transparent substrate 10. The substrate 10 is a transparent substrate closest to the light emitting side. A transparent protective cover 50 is disposed on the LEDs on the first transparent substrate 10, and the blue, red, and green LEDs uniformly disposed on the first transparent substrate 10 in this order are all It is an LED with a size less than 100um, and the bottom of the LED on the first transparent substrate and the second transparent substrate is provided with a light shielding layer 40.

In the display panel shown in FIG. 1, the light emitted by the LEDs in the second transparent substrate and the third transparent substrate is divided into two parts, one part is absorbed by the light shielding layer, and the other part is emitted through the transparent substrate and the transparent protective cover. Display function; all the light emitted by the LED on the first transparent substrate is emitted through the transparent protective cover. In order to achieve a Micro-LED level display effect, the size of the LEDs on the first transparent substrate is less than 100um, and the size of the LEDs on the second transparent substrate is less than 200um. The pitch is less than 100um, the size of the LED on the third transparent substrate is less than 300um, and the size of the light shielding layer is less than or equal to the size of the LED. In this way, the pixel size of the LED display is less than 100um, and the display effect of Micro-LED is realized.

Preferably, the transparent protective cover is used to protect the LEDs on the first transparent substrate from abrasion and prevent bumps.

The split-type LED display panel provided in this embodiment eliminates the non-display interval between the pixels, thereby eliminating the graininess when the screen is displayed, and the display effect is greatly improved.

Preferably, the material of the light-shielding layer is one of resin or ink, but is not limited thereto. The function of the light-shielding layer is mainly used to block the light emitted by the LED directly behind the light-shielding layer and prevent the occurrence of color mixing. The method of making the light-shielding layer is one of printing, exposure, etching or embossing. Species, but not limited to this.

Preferably, the materials of the first transparent substrate, the second transparent substrate, and the third transparent substrate are independently selected from one of glass or polyimide, but are not limited thereto. More preferably, the materials of the first transparent substrate, the second transparent substrate, and the third transparent substrate are polyimide, and the transmittance of the transparent substrate made of the polyimide can reach 90% or more.

In a preferred embodiment, as shown in FIG. 1, a support 60 is provided between the first transparent substrate 10, the second transparent substrate 20, the third transparent substrate 30, and the transparent protective cover 50. The support is provided to prevent collision between adjacent transparent substrates, and the support also functions as an assembly.

The split-type LED display panel provided by the present invention can switch different display modes by sending different control signals to suit different application scenarios.

Specifically, the method for controlling a split-type LED display panel provided by the present invention, as shown in FIG. 2, includes the following steps:

S10. When the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel. The pixel includes at least two red LEDs and at least two green LEDs. And at least two blue LEDs;

S20. When the split-type LED display panel is used for small viewing angle display, different control signals are sent to LEDs of different colors in a pixel, where each pixel includes a red LED, a green LED, and One blue LED.

In a preferred embodiment, as shown in FIG. 3, when the split-type LED display panel is used for small viewing angle display, for example, only when it is used in front viewing angle, different colors are sent to LEDs of different colors in one pixel. Control signal, a pixel includes only one red LED, one green LED, and one blue LED. In this embodiment, since the size of a single pixel is the smallest, the PPI of the display panel is effectively improved, which makes the display panel in this embodiment have an optimized front view display effect, and its screen is fine and free of graininess; However, its viewing angle is small, and it is only suitable for AR, VR, mobile phones, desktop displays and other application scenarios that do not require high viewing angles. These application scenarios do not require multiple people to share display content.

In a preferred embodiment, as shown in FIG. 4 and FIG. 5, when the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel. A pixel includes two red LEDs, two green LEDs, and two blue LEDs. At this time, the size of a single pixel becomes larger, and the display effect of the front view angle is worse than that of the display panel of FIG. 3, but since the LED display panel in this embodiment also implements a Micro-LED level display, The volume display effect is still better than the current LED display panel in the market. Further, since LEDs of the same color in a single pixel in this embodiment will receive the same control signal, when the side-view angle is large, the two LEDs of different colors on the first transparent substrate and the second The third color LED on the transparent substrate constitutes a complete display pixel, which can improve the problem of narrow viewing angle of the existing LED display panel to a certain extent.

Preferably, in this embodiment, since part of the light of the LED pixels on the second transparent substrate is absorbed by the first transparent substrate, in order to improve the display brightness and uniformity of the color of the LED display panel, the second The driving current of the transparent substrate improves the large viewing angle display effect of the LED display panel.

In a preferred embodiment, as shown in FIG. 6 and FIG. 7, when the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel. One pixel can also include three red LEDs, three green LEDs, and three blue LEDs. In this embodiment, the size of a single pixel becomes larger, and the display effect of the front view angle thereof is worse than the front view display effect of the display panel of FIG. 5. However, when the display panel in this embodiment is viewed from a side view angle, since the first transparent substrate and the second transparent basic LED provide effective three-color display pixels, the large-angle display effect is best.

Preferably, if the LED display panel provided in this embodiment is only used for large viewing angle display, the control signal of the third transparent substrate may be turned off, because in the large viewing angle display, the third transparent substrate is not used. This can effectively reduce the energy consumption of the LED display panel of the present invention.

Specifically, the LED display panel provided by the present invention can switch the required mode according to the actual application scenario. For example, in the AR or VR application scenario, the most perfect display effect can be obtained through the small viewing angle control mode of FIG. 3 without being affected by the viewing angle. In the application scenario of the auditorium or conference room, the large-angle display mode can be improved through the large-angle control mode shown in Figure 4 or Figure 7. Although the picture fineness is reduced, it is still higher than the current LED display on the market. The display effect of the panel.

In summary, the split-type LED display panel provided by the present invention can realize Micro-LED level display without fully using small-sized (less than 100um) LEDs, and can also switch different displays according to different application scenarios The mode, especially for large-angle display scenes, can effectively solve the problem of small viewing angles of existing LED display panels.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

A split-type LED display panel, comprising a first transparent substrate, a second transparent substrate, and a third transparent substrate arranged side by side. The first transparent substrate is uniformly provided with blue, red, and green LEDs in this order. Red, green, and blue LEDs are uniformly arranged in sequence on the second transparent substrate, and green, blue, and red LEDs are uniformly arranged in sequence on the third transparent substrate; the first transparent substrate, the second transparent substrate, and In the third transparent substrate, the bottom of the LEDs on the two transparent substrates disposed near the light emitting side are provided with a light shielding layer, and the size of the LEDs on the transparent substrate closest to the light emitting side is less than 100um.
The split-type LED display panel according to claim 1, wherein a material of the light-shielding layer is one of resin or ink.
The split-type LED display panel according to claim 1, wherein, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, an LED on a transparent substrate closest to the light emitting side is further provided with Transparent protective cover.
The split type LED display panel according to claim 3, wherein a support is provided between the first transparent substrate, the second transparent substrate, the third transparent substrate, and the transparent protective cover.
The split-type LED display panel according to claim 1, wherein the materials of the first transparent substrate, the second transparent substrate, and the third transparent substrate are independently selected from one of glass or polyimide. .
The split-type LED display panel according to claim 1, wherein a size of the light shielding layer is smaller than or equal to a size of the LED at a position corresponding thereto.
The split-type LED display panel according to claim 1, wherein, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, the LED on the transparent substrate furthest from the light-emitting side has a size smaller than 300 μm.
The split-type LED display panel according to claim 1, wherein, among the first transparent substrate, the second transparent substrate, and the third transparent substrate, an LED on a transparent substrate at a middle position has a size of less than 200um.
The split-type LED display panel according to claim 8, wherein among the first transparent substrate, the second transparent substrate, and the third transparent substrate, an adjacent LED on the transparent substrate at the intermediate position The spacing is less than 100um.
A control method of a split type LED display panel according to any one of claims 1-9, comprising the steps of:

When the split-type LED display panel is used for large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel, the pixel includes at least two red LEDs, at least two green LEDs, and at least two Two blue LEDs;

When the split-type LED display panel is used for small viewing angle display, different control signals are sent to LEDs of different colors in one pixel. The one pixel includes one red LED, one green LED, and one Blue LED.
The method for controlling a split-type LED display panel according to claim 10, wherein when the split-type LED display panel is used for wide-angle display, the wide-angle display is controlled by adjusting the driving current of the transparent substrate located at the middle position. effect.
The method for controlling a split-type LED display panel according to claim 10, wherein when the split-type LED display panel is used for a large viewing angle display, the same control signal is sent to LEDs of the same color in one pixel, The one pixel may further include three red LEDs, three green LEDs, and three blue LEDs.
The method for controlling a split-type LED display panel according to claim 10, wherein when the split-type LED display panel is used for large-angle display, a control signal for turning off a transparent substrate farthest from the light-emitting side is turned off.
The method for controlling a split-type LED display panel according to claim 10, wherein when the split-type LED display panel is used for AR or VR display, different control signals are sent to LEDs of different colors in one pixel The one pixel includes one LED, one green LED, and one blue LED.
The control method of a split-type LED display panel according to claim 10, wherein when the split-type LED display panel is used for an auditorium or conference room display, the same control is sent to LEDs of the same color in one pixel Signal, the one pixel includes at least two red LEDs, at least two green LEDs, and at least two blue LEDs.