High-color-gamut full-color Micro LED pixel module and module matrix

Abstract

The invention discloses a pixel module of a high-color gamut full-color Micro LED and a module matrix, a blue region in a pixel is placed at one corner of the pixel module, and a first color region and a second color region are symmetrically arranged by taking a diagonal line of an outer frame of the pixel module as an axis, so that the area of the first color and the area of the second color are maximized; and moreover, the light-proof layer is fully utilized in a limited range, and excitation crosstalk among all color pixels is eliminated. The third color is blue, the light source of the LED is blue, the blue light has higher luminous intensity, and the first color and the second color are obtained by the color conversion module, so that the brightness is lower than that of the blue light, the area of the blue region is reduced, the areas of the first color and the second color are maximized, and the ratio of the three colors can be balanced; therefore, the color gamut range of the chip is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor electronic technology, and in particular to a pixel module and a module matrix of a high color gamut full-color Micro LED. Background Art

[0002] Since all pixels of the integrated full-color Micro LED are integrated on one substrate without any cutting or other division, optical crosstalk will occur between adjacent pixels, affecting the display effect.

[0003] The existing integrated color Micro LED technology mainly uses an integrated blue and purple GaN LED chip matrix light source and a QD color conversion module stacked together. There will be optical crosstalk problems between the Mesas of the GaN LED chip matrix light source, inside the common N-type N-type GaN material, and in the sapphire substrate layer. There will also be optical crosstalk problems between the quantum dots of the QD module and in the gaps between the QD module and the chip combination. There are also problems such as the high intensity of blue light emitted by the LED and insufficient excitation of the QD material, which leads to an excessively high proportion of blue in the overall device and a low proportion of red and green, which in turn causes the display device to have weak colors in red and green, and an insufficient color gamut range for the entire device. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pixel module and module matrix of a high-color gamut full-color Micro LED, which can effectively improve the color gamut range of the chip.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A high color gamut full-color Micro LED pixel module, comprising an LED light-emitting substrate and a color conversion module stacked in sequence from bottom to top; The color conversion module includes a first color excitation area, a second color excitation area, a third color light-transmitting area and an opaque area. The first color excitation area and the second color excitation area are symmetrically arranged with the diagonal line of the pixel module outer frame as the axis. The area of ​​the first color excitation area is equal to the area of ​​the second color excitation area and is larger than the area of ​​the third color light-transmitting area. The third color light-transmitting area is located at a corner of the color conversion module. The third color is blue. The LED light-emitting substrate includes a first light source area, a second light source area, a third light source area and a non-light-emitting area; The first light source area corresponds to the position of the first color excitation area, the second light source area corresponds to the position of the second color excitation area, and the third light source area corresponds to the position of the third color light-transmitting area.

[0006] In order to solve the above technical problems, another technical solution adopted by the present invention is: A module matrix of a high color gamut full-color Micro LED comprises a plurality of the above-mentioned pixel modules of a high color gamut full-color Micro LED, wherein the plurality of the pixel modules are arranged in a preset matrix form.

[0007] The beneficial effects of the present invention are: placing the blue area in the pixel at a corner of the pixel module, and symmetrically arranging the first color and the second color area with the diagonal of the outer frame of the pixel module as the axis, thereby maximizing the area of ​​the first color and the second color; and making full use of the opaque layer within a limited range to eliminate the excitation crosstalk between pixels of each color. Since the third color is blue, the LED light source itself is blue, and the blue light itself has a high luminous intensity, the first color and the second color are obtained from the color conversion module, so the brightness is lower than that of blue, so reducing the area of ​​the blue area and maximizing the area of ​​the first color and the second color can balance the proportion of the three colors, thereby effectively improving the color gamut range of the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of a color conversion module according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of an LED light-emitting substrate according to an embodiment of the present invention; Figure 3 A schematic diagram of the combination of a color conversion module and an LED light-emitting substrate according to an embodiment of the present invention; Figure 4 Schematic diagram of the structure of a pixel module of a high color gamut full-color Micro LED according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the color conversion module with the edge retracted inward according to an embodiment of the present invention; Figure 6 This is a structural schematic diagram of a module matrix of a high color gamut full-color Micro LED according to an embodiment of the present invention.

[0009] Description of labels: 1. First color excitation area; 2. Second color excitation area; 3. Third color light-transmitting area; 4. Light-opaque area; 5. First light source area; 6. Second light source area; 7. Third light source area; 8. Non-luminous area. DETAILED DESCRIPTION

[0010] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0011] Please refer to Figures 1 to 5, an embodiment of the present invention provides a high color gamut full-color Micro LED pixel module, comprising an LED light-emitting substrate and a color conversion module stacked sequentially from bottom to top; The color conversion module includes a first color excitation region 1, a second color excitation region 2, a third color light-transmitting region 3 and an opaque region 4. The first color excitation region 1 and the second color excitation region 2 are symmetrically arranged with the diagonal line of the pixel module outer frame as the axis. The area of ​​the first color excitation region 1 is equal to the area of ​​the second color excitation region 2 and is larger than the area of ​​the third color light-transmitting region 3. The third color light-transmitting region 3 is located at a corner of the color conversion module. The third color is blue. The LED light-emitting substrate comprises a first light source area 5, a second light source area 6, a third light source area 7 and a non-light-emitting area 8; The first light source area 5 corresponds to the position of the first color excitation area 1 , the second light source area 6 corresponds to the position of the second color excitation area 2 , and the third light source area 7 corresponds to the position of the third color light-transmitting area 3 .

[0012] From the above description, it can be seen that the beneficial effects of the present invention are: placing the blue area in the pixel at a corner of the pixel module, and the first color and second color areas are symmetrically arranged with the diagonal of the outer frame of the pixel module as the axis, thereby maximizing the area of ​​the first color and the second color; and making full use of the opaque layer within a limited range to eliminate the excitation crosstalk between pixels of each color. Since the third color is blue, the LED's own light source is blue, and the blue light itself has a high luminous intensity. The first color and the second color are obtained from the color conversion module, so the brightness is lower than that of blue. Therefore, reducing the area of ​​the blue area and maximizing the area of ​​the first color and the second color can balance the proportion of the three colors, thereby effectively improving the color gamut range of the chip.

[0013] Furthermore, the ratio of the area of ​​the first color excitation region 1 or the area of ​​the second color excitation region 2 to the area of ​​the third color light-transmitting region 3 is greater than or equal to 3; the area of ​​the third color light-transmitting region 3 in the color conversion module accounts for less than 5%.

[0014] From the above description, it can be seen that setting the excitation area of ​​the first color or the second color to more than 3 times that of the blue light-transmitting area can compensate for the problem of lower brightness of the first color and the second color and greater brightness of the blue color, thereby balancing the proportion of the three colors.

[0015] Furthermore, the ratio of the sum of the areas of the first light source region 5 , the second light source region 6 , and the third light source region 7 to the area of ​​the non-luminous region 8 is 30:70 to 40:60.

[0016] It can be seen from the above description that the three-color crosstalk prevention can be effectively achieved through the area ratio of the total color display area and the total non-luminous area 8, avoiding the diffuse light in the blue area.

[0017] Furthermore, the area of ​​each light source region in the LED light-emitting substrate is smaller than or equal to the area of ​​the corresponding region in the color conversion module; the distance between the outline of the first light source region or the second light source region in the LED light-emitting substrate and the outline of the corresponding region in the color conversion module is greater than or equal to 1 μm.

[0018] It can be seen from the above description that accurate color excitation can be ensured by retaining a fitting alignment space between the color conversion module and the LED light-emitting substrate.

[0019] Furthermore, the first color excitation region 1 and the second color excitation region 2 are quasi-triangular or quasi-trapezoidal in shape.

[0020] It can be seen from the above description that the shapes of the first color excitation region 1 and the second color excitation region 2 are set to be quasi-triangular or quasi-trapezoidal, so as to maximize the area of ​​the excitation region.

[0021] Furthermore, an angle between one side of the first color excitation area 1 and the second color excitation area 2 close to the outer frame of the pixel module and the outer frame of the pixel module is 3-10 degrees.

[0022] It can be seen from the above description that by setting the outer edge of the excitation area to be retracted by 3-10 degrees, the optical crosstalk can be further reduced.

[0023] Furthermore, the distance between the first color excitation region 1 and the third color light-transmitting region 3 is greater than or equal to 1.5 μm.

[0024] It can be seen from the above description that by setting the distance between the excitation area and the blue light-transmitting area to be greater than 1.5 um, a sufficient anti-crosstalk area is further left.

[0025] Please refer to Figure 6 Another embodiment of the present invention provides a module matrix of a high color gamut full-color Micro LED, including a plurality of the above-mentioned high color gamut full-color Micro LED pixel modules, and the plurality of the pixel modules are arranged in a preset matrix form.

[0026] The above-mentioned high color gamut full-color Micro LED pixel module and module matrix of the present invention are suitable for effectively improving the color gamut range of the chip, and are described below through specific implementation methods: Please refer to Figures 1 to 5 , Embodiment 1 of the present invention is: A high color gamut full-color Micro LED pixel module, comprising an LED light-emitting substrate and a color conversion module stacked in sequence from bottom to top; The color conversion module includes a first color excitation region 1, a second color excitation region 2, a third color light-transmitting region 3 and an opaque region 4. The first color excitation region 1 and the second color excitation region 2 are symmetrically arranged with the diagonal line of the pixel module outer frame as the axis. The area of ​​the first color excitation region 1 is equal to the area of ​​the second color excitation region 2 and is larger than the area of ​​the third color light-transmitting region 3. The third color light-transmitting region 3 is located at a corner of the color conversion module. The third color is blue. The LED light-emitting substrate comprises a first light source area 5, a second light source area 6, a third light source area 7 and a non-light-emitting area 8; The first light source area 5 corresponds to the position of the first color excitation area 1 , the second light source area 6 corresponds to the position of the second color excitation area 2 , and the third light source area 7 corresponds to the position of the third color light-transmitting area 3 .

[0027] Please refer to Figure 1 In this embodiment, the color conversion module can be a quantum dot color conversion module, the first color is red, and the second color is green. In a color conversion module, the morphology and area ratio of the red and green excitation regions are adjusted so that the red and green excitation regions have the same area and are mirror images of each other with the diagonal of the pixel frame as the axis. Among them, blue is located in a corner in each color pixel unit, leaving most of the pixel area for red and green pixels and an opaque layer to prevent crosstalk. Among them, the areas of the red and green excitation regions are the same by default, and can be adjusted according to needs. The adjustment method is to expand or shrink the area.

[0028] In some embodiments, the position and area ratio of the blue light-transmitting area are adjusted so that the area of ​​the red or green excitation area is more than three times the area of ​​the blue light-transmitting area. In this embodiment, the area ratio of the blue light-transmitting area in the color conversion module is less than 5%, and the area ratio of the red excitation area or the green excitation area is greater than 15%. In addition, anti-crosstalk adjustment is performed at the edges of the red and green pixels to avoid diffuse light in the blue area, so that the area ratio of the total display area of ​​the red, green and blue colors to the total non-luminous area 8 is between 30:70 and 40:60.

[0029] Please refer to Figures 1 to 4 In this embodiment, the length and width of the LED pixel module are 10 μm, the area of ​​each light source region in the LED light-emitting substrate is less than or equal to the area of ​​the corresponding region in the color conversion module, and the distance between the outline of the first light source region or the second light source region in the LED light-emitting substrate and the outline of the corresponding region in the color conversion module is greater than or equal to 1 μm.

[0030] In some embodiments, the shapes of the first color excitation area 1 and the second color excitation area 2 are both triangular or trapezoidal, the first light source area 5 has the same shape as the first color excitation area 1, the second light source area 6 has the same shape as the second color excitation area 2, the third light source area 7 has the same shape as the third color translucent area 3, and the outline of the color excitation area or the color translucent area is a copy of the outline of the corresponding light source area expanded by 1 to 1.5 μm.

[0031] In other embodiments, the outline of the color excitation region or the color light-transmitting region may be different in shape from the outline of the corresponding light source region.

[0032] Please refer to Figure 5 In this embodiment, the red and green pixels are offset inward near the adjacent blue pixel, and the outer edge of the pixel has an angle of 3-10°, preferably 5°, compared to the pixel outer frame. Therefore, the red and green pixels increase the anti-crosstalk isolation area with the adjacent pixel blue light by the angle with the pixel outer frame, which can achieve the effect of reducing light color crosstalk and increasing the color gamut range.

[0033] Furthermore, in this embodiment, the distance between the red and green excitation regions and the blue light-transmitting region is greater than or equal to 1.5 μm, so as to further reduce the crosstalk problem.

[0034] Please refer to Figure 6 , Embodiment 2 of the present invention is: A module matrix of a high color gamut full-color Micro LED comprises a plurality of the above-mentioned pixel modules of a high color gamut full-color Micro LED, wherein the plurality of the pixel modules are arranged in a preset matrix form.

[0035] In summary, the present invention provides a high color gamut full-color Micro LED pixel module and module matrix, which places the blue area in the pixel at a corner of the pixel module, and the first color and second color areas are symmetrically arranged with the diagonal of the pixel module outer frame as the axis, thereby maximizing the area of ​​the first color and the second color; and fully utilizing the opaque layer within a limited range to eliminate the excitation crosstalk between pixels of each color. Accurate color excitation is ensured by retaining the matching alignment space between the color conversion module and the LED light-emitting substrate. Since the third color is blue, the LED light source itself is blue, and the blue light itself has a high luminous intensity. The first color and the second color are obtained from the color conversion module, so the brightness is lower than that of blue. Therefore, reducing the area of ​​the blue area and maximizing the area of ​​the first color and the second color can balance the proportion of the three colors, thereby effectively improving the color gamut range of the chip.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high color gamut full-color Micro LED pixel module, characterized in that: It includes an LED light-emitting substrate and a color conversion module stacked in sequence from bottom to top; The color conversion module includes a first color excitation area, a second color excitation area, a third color light-transmitting area and an opaque area. The first color excitation area and the second color excitation area are symmetrically arranged with the diagonal line of the pixel module outer frame as the axis. The area of ​​the first color excitation area is equal to the area of ​​the second color excitation area and is larger than the area of ​​the third color light-transmitting area. The third color light-transmitting area is located at a corner of the color conversion module. The third color is blue. The LED light-emitting substrate includes a first light source area, a second light source area, a third light source area and a non-light-emitting area; The first light source area corresponds to the position of the first color excitation area, the second light source area corresponds to the position of the second color excitation area, and the third light source area corresponds to the position of the third color light-transmitting area.

2. The high color gamut full-color Micro LED pixel module according to claim 1, characterized in that: The ratio of the area of ​​the first color excitation region or the area of ​​the second color excitation region to the area of ​​the third color light-transmitting region is greater than or equal to 3.

3. The high color gamut full-color Micro LED pixel module according to claim 2, characterized in that: The third color light-transmitting region accounts for less than 5% of the area of ​​the color conversion module.

4. The high color gamut full-color Micro LED pixel module according to claim 1, characterized in that: The ratio of the sum of the areas of the first light source region, the second light source region and the third light source region to the area of ​​the non-luminous region is 30:70 to 40:

60.

5. The high color gamut full-color Micro LED pixel module according to claim 1, characterized in that: The area of ​​each light source region in the LED light-emitting substrate is smaller than or equal to the area of ​​the corresponding region in the color conversion module.

6. The high color gamut full-color Micro LED pixel module according to claim 5, characterized in that: The distance between the outline of the first light source area or the second light source area in the LED light-emitting substrate and the outline of the corresponding area in the color conversion module is greater than or equal to 1 μm.

7. The high color gamut full-color Micro LED pixel module according to claim 1, characterized in that: The first color excitation area and the second color excitation area are in a shape of a quasi-triangle or a quasi-trapezoidal shape.

8. The high color gamut full-color Micro LED pixel module according to claim 7, characterized in that: An included angle between one side of the first color excitation area and the second color excitation area close to the pixel module outer frame and the pixel module outer frame is 3-10 degrees.

9. The high color gamut full-color Micro LED pixel module according to claim 1, characterized in that: The distance between the first color excitation area and the third color light-transmitting area is greater than or equal to 1.5 μm.

10. A module matrix of a high color gamut full-color Micro LED, characterized in that: It comprises a plurality of high color gamut full-color Micro LED pixel modules as described in any one of claims 1 to 9, wherein the plurality of pixel modules are arranged in a preset matrix form.

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