A pixel design and preparation method for high-resolution display

Abstract

The present invention relates to a pixel design and preparation method for high-resolution display. An independent pixel is divided into four regions, namely, four sub-pixels, namely, a blue light-emitting region P1, a green / blue region P2, a red / blue region P3, and a fourth region P4. The fourth region P4 can be transformed into a green / blue region, a red / blue region, a red / green / blue region, or a green / red / blue region as needed; and a whole blue light-emitting layer or array L1, a green stripe light-emitting layer or a red stripe light-emitting layer L2, and a red stripe light-emitting layer or a green stripe light-emitting layer L3 are sequentially deposited. The present invention can realize high-resolution pixel display, and does not require multiple alignment processes required by traditional processes to realize pixel display, and can exist as a functional layer of a multi-layer electroluminescent device, which greatly simplifies the pixel preparation process and is conducive to the industrialization of high-resolution pixel display.

Description

Technical Field

[0001] The present invention belongs to the technical field of light-emitting display, and in particular relates to a pixel design and preparation method for high-resolution display. Background Art

[0002] Virtual display and augmented reality display technology have developed rapidly in recent years and have become a research hotspot and development focus of global information technology and industry, and are expected to completely change the way people perceive and process various digital information. This technology points the way for head-mounted displays as carriers to develop in the direction of ultra-high resolution. At present, mainstream light-emitting devices mainly rely on metal fine masks or white light with filters. Among them, metal fine masks are difficult to achieve ultra-high resolution display due to the boundary shadow effect and the need for multiple alignment processes; white light with filters is a mainstream technology adopted by large-screen manufacturers, but there is a large light loss (>70%), which consumes more power and accelerates the performance degradation of the equipment, which is not conducive to the application of high-resolution display.

[0003] Based on blue backlight and red-green color conversion layer, red and green pixels are deposited on the blue plane backlight at intervals to convert blue light into red and green light to achieve full-color display. It is used in current ULED and QD-OLED, but the red and green pixel stacking alignment process still needs to be considered, and it is difficult to achieve ultra-high resolution pixelization. Samsung uses super surface to adjust the light output of white light OLED to achieve ultra-high resolution display, but this technology has strict requirements on device film parameters and reflective interface, and the optical structure is difficult to expand to flexible devices. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide a pixel design and preparation method for high-resolution display. This method can realize high-resolution pixel display without the need for multiple alignment processes required by traditional processes to realize pixel display. It can also be directly used as a functional layer in a multi-layer electroluminescent device, greatly simplifying the preparation process of the luminescent pixel and facilitating the industrialization of high-resolution pixel display.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a pixel design and preparation method for high-resolution display, which divides independent pixels into four areas, namely, four sub-pixels of a blue light-emitting area P1, a green / blue area P2, a red / blue area P3 and a fourth area P4, and the fourth area P4 can be transformed into a green / blue area, a red / blue area, a red / green / blue area or a green / red / blue area as needed; and sequentially deposits an entire blue light-emitting layer or array L1, a green stripe light-emitting layer or a red stripe light-emitting layer L2, and a red stripe light-emitting layer or a green stripe light-emitting layer L3.

[0006] In one embodiment of the present invention, the angle between L2 and L3 is 30-150 degrees.

[0007] In one embodiment of the present invention, the size of the independent pixel is between 100 nm and 200 μm.

[0008] In one embodiment of the present invention, the blue light-emitting layer includes NLED, μLED, and an organic or quantum dot light-emitting layer.

[0009] In one embodiment of the present invention, the red stripe light-emitting layer and the green stripe light-emitting layer are both parallel structures, which are realized by nano-imprinting or micro-transfer printing, and the thickness of the film is 5nm-200μm.

[0010] In one embodiment of the present invention, the colorization of independent pixels is achieved by adjusting the light-emitting areas and respective brightness of four sub-pixels, wherein the area is achieved by the ratio of stripes and spaces of the deposition template, which is 0.1-10.

[0011] In one embodiment of the present invention, the red stripe light-emitting layer and the green stripe light-emitting layer include quantum dots, organic light-emitting materials, perovskite materials, and rare earth phosphors for universal electroluminescence / photoluminescence, and can be commonly used in upright or inverted electroluminescent devices and photoluminescence conversion films.

[0012] In one embodiment of the present invention, the multi-color luminescence of the independent pixel is achieved by light absorption conversion or carrier migration recombination, and the conversion from blue to other colors is realized in the stacked film. A single independent pixel is arranged in sequence by P1, P2, P3 and P4.

[0013] In one embodiment of the present invention, the P4 can form two structures of L2 / L1 or L3 / L2 / L1 according to the surface adhesion during the deposition of L3, and the color is adjustable, serving as the fourth sub-pixel to cooperate with the other three.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the method of the present invention is composed of a whole blue light-emitting layer and a red and green striped light-emitting layer at a certain angle, and a single independent pixel is composed of four regions. The regional light-emitting color is adjusted through external excitation control to achieve full-color display; the method of the present invention can achieve high-resolution pixel display, and does not require traditional processes to undergo multiple alignment processes to achieve pixelated display, and can exist as a functional layer of a multi-layer electroluminescent device, which greatly simplifies the pixelation preparation process and is conducive to the industrialization of high-resolution pixel display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of a pixel design and preparation method for high-resolution display of the present invention;

[0016] Figure 2 The entire blue light-emitting layer or array L1 is deposited on the substrate

[0017] Figure 3 It is a nanoimprint or transfer template of the green (red) stripe light-emitting layer L2;

[0018] Figure 4 It is a nanoimprint or transfer template of the red (green) stripe light-emitting layer L3;

[0019] Figure 5 is the deposited green (red) stripe light-emitting layer L2;

[0020] Figure 6 is the deposited red (green) stripe light-emitting layer L3;

[0021] Figure 7 A single independent pixel contains four sub-pixels P1, P2, P3, and P4.

[0022] Explanation of the numbers in the figure: 100 - L1 blue light-emitting layer or array; 110 - L2 nanoimprint or transfer template; 120 - L3 nanoimprint or transfer template; Y1, Y2 correspond to the width of the raised and recessed areas of the L2 stripe template; X1, X2 correspond to the width of the raised and recessed areas of the L3 stripe template. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 , 7 As shown, the present invention is a pixel design and preparation method for high-resolution display, which divides independent pixels into four areas, namely, four sub-pixels of a blue light-emitting area P1, a green / blue area P2, a red / blue area P3 and a fourth area P4. The fourth area P4 can be transformed into a green / blue area, a red / blue area, a red / green / blue area or a green / red / blue area as needed; and sequentially deposits a whole blue light-emitting layer or array L1, a green stripe light-emitting layer or a red stripe light-emitting layer L2, and a red stripe light-emitting layer or a green stripe light-emitting layer L3.

[0025] The following are specific implementation examples of the present invention.

[0026] Example 1

[0027] A pixel design and preparation method for high-resolution display, the specific steps are:

[0028] In the first step, corresponding to the quantum dot electroluminescent device, a layer of blue quantum dots (i.e., the blue light-emitting layer or array 100 of L1) is spin-coated, scraped or printed on the hole transport layer, such as Figure 2 ;

[0029] In the second step, the stripes of L2 are nanoimprinted or transferred using a template (see Figure 3) 110, dip the green quantum dot film and then transfer it onto the blue quantum dots (see Figure 5 );

[0030] In the third step, the stripes of L3 are nanoimprinted or transferred using a template (see Figure 4 ) 120, dip the red quantum dot film, transfer it to the blue quantum dot at a 90-degree angle to the green quantum dot stripes (see Figure 6 ), using surface energy regulation to deposit all the red quantum dots onto the substrate;

[0031] The fourth step is to deposit other functional layers to prepare an electroluminescent device.

[0032] Example 2

[0033] A pixel design and preparation method for high-resolution display, the specific steps are:

[0034] In the first step, corresponding to the quantum dot electroluminescent device, a layer of blue quantum dots (i.e., the blue light-emitting layer or array 100 of L1) is spin-coated, scraped or printed on the hole transport layer, such as Figure 2 ;

[0035] In the second step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 3 ) 110, dip the green quantum dot film and then transfer it onto the blue quantum dots (see Figure 5 );

[0036] In the third step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 4 ) 120, dip the red quantum dot film, transfer it to the blue quantum dot at a 90-degree angle to the green quantum dot stripes (see Figure 6 ), using surface energy regulation, the red quantum dots are deposited only on the surface of the blue quantum dots, and not on the surface of the green quantum dots;

[0037] The fourth step is to deposit other functional layers to prepare an electroluminescent device.

[0038] Example 3

[0039] A pixel design and preparation method for high-resolution display, the specific steps are:

[0040] In the first step, corresponding to the quantum dot electroluminescent device, a layer of blue quantum dots (i.e., the blue light-emitting layer or array 100 of L1) is spin-coated, scraped or printed on the hole transport layer, such as Figure 2 ;

[0041] In the second step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 3 ) 110, dip the red quantum dot film and then transfer it to the blue quantum dots (see Figure 5 );

[0042] In the third step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 4 ) 120, dip the green quantum dot film at a 90-degree angle to the red quantum dot stripes and transfer it onto the blue quantum dots (see Figure 6 ), using surface energy regulation, the green quantum dots are deposited only on the surface of the blue quantum dots, and not on the surface of the red quantum dots;

[0043] The fourth step is to deposit other functional layers to prepare an electroluminescent device.

[0044] Example 4

[0045] A pixel design and preparation method for high-resolution display, the specific steps are:

[0046] The first step is to prepare a display array substrate with blue LEDs corresponding to the nano / micro LED photoluminescent device, such as Figure 2 ;

[0047] In the second step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 3 ) 110, dip the green quantum dot film and then transfer it onto the blue quantum dots (see Figure 5 );

[0048] In the third step, the lateral stripes are nanoimprinted or transferred using a template (see Figure 4 ) 120, dip the red quantum dot film, transfer it to the blue quantum dot at a 90-degree angle to the green quantum dot stripes (see Figure 6 ), using surface energy regulation, the red quantum dots are deposited only on the surface of the blue quantum dots, and not on the surface of the green quantum dots.

[0049] The above are preferred embodiments of the present invention. Any changes made according to the technical solution of the present invention, as long as the resulting functions do not exceed the scope of the technical solution of the present invention, belong to the protection scope of the present invention.

Claims

1. A pixel design and preparation method for high-resolution display, characterized in that: Separate the independent pixel into four regions, namely, the blue light emitting region P1, the green / blue region P2, the red / blue region P3 and the fourth region P4. The fourth region P4 can be transformed into a green / blue region, a red / blue region, a red / green / blue region or a green / red / blue region as needed. Depositing the entire blue light-emitting layer or the blue light-emitting array L1, the green stripe light-emitting layer L2, and the red stripe light-emitting layer L3 in sequence; or depositing the entire blue light-emitting layer or the blue light-emitting array L1, the red stripe light-emitting layer L2, and the green stripe light-emitting layer L3 in sequence; The angle between L2 and L3 is 30-150 degrees; The colorization of independent pixels is achieved by adjusting the light-emitting area and respective brightness of the four sub-pixels, where the area is achieved by the ratio of stripes and blanks of the deposition template, which is 0.1-10; The P4 can form two structures, L2 / L1 or L3 / L2 / L1, according to the surface adhesion during the deposition of L3. The color is adjustable and it serves as the fourth sub-pixel to cooperate with the other three.

2. A method for designing and preparing a pixel for high-resolution display according to claim 1, characterized in that: The independent pixel size is between 100 nm and 200 μm.

3. A method for designing and preparing a pixel for high-resolution display according to claim 1, characterized in that: The blue light-emitting layer includes NLED, μLED, and organic or quantum dot light-emitting layer.

4. The method for designing and preparing a pixel for high-resolution display according to claim 1, characterized in that: The red stripe light-emitting layer and the green stripe light-emitting layer are both parallel structures, which are realized by nano-imprinting or micro-transfer printing, and the thickness of the film is 5nm-200μm.

5. The method for designing and preparing a pixel for high-resolution display according to claim 1, characterized in that: The red stripe luminescent layer and the green stripe luminescent layer include quantum dots, organic luminescent materials, perovskite materials, and rare earth phosphors for electroluminescent / photoluminescent universal luminescence, and can be commonly used in upright or inverted electroluminescent devices and photoluminescent conversion films.

6. The method for designing and preparing a pixel for high-resolution display according to claim 1, characterized in that: The multi-color luminescence of the independent pixel is achieved by light absorption conversion or carrier migration recombination, and the conversion from blue to other colors is realized in the laminated film. A single independent pixel is arranged in sequence by P1, P2, P3 and P4.

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