Monochromatic Blue LED Display and Method for Manufacturing the Same

Abstract

The present invention discloses a monochromatic blue LED display, which includes a blue LED light board, a glass plate and a protective film; the glass plate has opposite first and second surfaces, the first surface is provided with a first groove, the area on the first surface other than the first groove is covered with a metal mask layer, a red sub-pixel, a green sub-pixel and a blue sub-pixel are sequentially arranged in the first groove, the second surface is provided with a second groove facing the red sub-pixel and the green sub-pixel, and a red photoresist layer facing the red sub-pixel and a green photoresist layer facing the green sub-pixel are arranged in the second groove; the blue LED light board is pasted to the metal mask layer, and the blue LEDs thereon are aligned with the red sub-pixel, the blue sub-pixel and the green sub-pixel. The present invention can greatly reduce the problem of light crosstalk and solve the viewing angle color difference problem between the front view angle and the side view angle, and at the same time reduce the overall production cost. The present invention also discloses a manufacturing method of a monochromatic blue LED display.

Description

Technical Field

[0001] The present invention relates to the technical field of LED displays, and in particular to a monochromatic blue light LED display and a manufacturing method thereof. Background Art

[0002] At present, conventional LED display products in the industry use LEDs of three colors, red / green / blue, to display information, and have good performance in terms of reliability and display effect. However, since three-color LEDs are required, the material cost is very high. At the same time, there is also a problem that the service lives of the three-color LEDs are different, and the color will be distorted after long-term use. Therefore, a display screen solution that only uses blue LEDs has emerged.

[0003] Refer to Figure 1 as shown Figure 1 As shown is a schematic diagram of an existing monochromatic blue light LED display. In the prior art, a blue LED array layer 110`, a light conversion material array layer 120`, and a photoresist array layer 130` are sequentially arranged. When the blue light emitted by the blue LED (111`) enters the light conversion material layer 121` disposed above it, it will be converted into corresponding red light and green light, while the uppermost photoresist material layer 131` absorbs the un-converted blue light. The structural arrangement of the existing monochromatic blue light LED display mainly has the following three problems:

[0004] First, the photoresist material belongs to a small molecule material. The photoresist material is evaporated on the glass surface. In order to make pixel structures of red / green / blue three colors, three photomasks are required and evaporated three times, and the overall production cost is very high;

[0005] Second, there is a problem of blue light crosstalk between pixels, that is, the blue light emitted by the blue LED of a single pixel will spread to the light conversion material layer 121` of adjacent pixels, and light up the adjacent light conversion pixels to emit light;

[0006] Third, there is a problem of viewing angle parallax. Since the propagation paths of blue light in the light conversion material layer 121` and the photoresist material layer 131` are different between the front view angle and the side view angle, the absorption ratios of blue light at the front view angle and the side view angle are different, so there is a problem of viewing angle parallax.

[0007] Therefore, it is necessary to provide a monochromatic blue light LED display and a manufacturing method thereof that can solve the problems of blue light crosstalk between pixels and viewing angle parallax, and have low cost, so as to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a monochromatic blue light LED display that can solve the problems of blue light crosstalk between pixels and viewing angle parallax, and has low cost.

[0009] Another object of the present invention is to provide a manufacturing method of a monochromatic blue light LED display that can solve the problems of blue light crosstalk and viewing angle parallax of pixels and has a low cost.

[0010] To achieve the above object, the technical solution of the present invention is: to provide a monochromatic blue light LED display, which includes a blue light LED light board, a glass plate and a protective film; wherein, the glass plate has opposite first and second surfaces, a first groove is provided on the first surface, a metal mask layer covers the area on the first surface that is not the first groove, red sub-pixels, green sub-pixels, and blue sub-pixels are cyclically arranged in the first groove in the order of red, green, and blue, a second groove is provided on the second surface opposite to the red sub-pixel and the green sub-pixel, and a red photoresist layer opposite to the red sub-pixel and a green photoresist layer opposite to the green sub-pixel are provided in the second groove; a plurality of blue light LEDs arranged in an array are provided on the blue light LED light board, the blue light LED light board is pasted to the metal mask layer, and the blue light LEDs are aligned with the red sub-pixels, the blue sub-pixels, and the green sub-pixels; the protective film is attached to the second surface.

[0011] Preferably, the monochromatic blue light LED display further includes a black glue layer, the black glue layer includes a plurality of black glue strips, and the black glue strips are provided between adjacent blue light LEDs and paste the blue light LED light board and the metal mask layer.

[0012] Preferably, the diameter of the second groove is smaller than the diameter of the first groove, so that the quantum dot light-emitting material filled in the second groove can absorb the blue light that is not completely absorbed by the blue sub-pixel and the green sub-pixel in the positive viewing angle direction, and the light emitted by the LED is fully converted into red light or green light.

[0013] Preferably, the depth of the first groove is greater than 50 microns, so that sufficient quantum dot light-emitting material can be accommodated to absorb blue light, and the light emitted by the LED is fully converted into red light or green light.

[0014] Preferably, a red light quantum dot light-emitting material, a green light quantum dot light-emitting material, and a transparent glue are sequentially filled in the continuously arranged first grooves to form the red sub-pixels, the green sub-pixels, and the blue sub-pixels; a red light quantum dot light-emitting material is filled in the second groove corresponding to the red sub-pixel to form the red photoresist layer, and a green light quantum dot light-emitting material is filled in the second groove corresponding to the green sub-pixel to form the green photoresist layer.

[0015] Preferably, the sequentially arranged red sub-pixels, green sub-pixels, and blue sub-pixels form a light conversion pixel array, so that a plurality of the light conversion pixel arrays are cyclically provided on the first surface.

[0016] Preferably, the first groove and the second groove are formed by etching on the first surface and the second surface of the glass plate.

[0017] Correspondingly, the present invention also provides a manufacturing method of a monochromatic blue light LED display, which includes the following steps:

[0018] (1) Provide a glass plate, and fabricate a metal mask layer on the second surface of the glass plate;

[0019] (2) Use hydrofluoric acid to etch the second surface of the glass plate to obtain a second groove, and then remove the metal mask layer;

[0020] (3) Fabricate a metal mask layer on the first surface of the glass plate, and use hydrofluoric acid to etch the first surface of the glass plate to obtain a first groove facing the second groove and a first groove offset from the second groove;

[0021] (4) Set red sub-pixels, green sub-pixels, and blue sub-pixels in the sequentially arranged first grooves in the order of red, green, and blue in a cyclic manner;

[0022] (5) Provide a blue light LED lamp board, on which a plurality of blue light LEDs are arranged in an array, bond the blue light LED lamp board to the first surface of the glass plate, and make the blue light LEDs face the red sub-pixels, the blue sub-pixels, and the green sub-pixels;

[0023] (6) Set a red photoresist layer in the second groove corresponding to the red sub-pixel, and set a green photoresist layer in the second groove corresponding to the green sub-pixel;

[0024] (7) Bond a protective film to the second surface of the glass plate to obtain a complete monochromatic blue light LED display.

[0025] Preferably, in the manufacturing method of the monochromatic blue light LED display of the present invention, the step (4) is specifically: fill red quantum dot light-emitting materials, green quantum dot light-emitting materials, and transparent glue in the sequentially arranged first grooves in the order of red, green, and blue to form the red sub-pixels, the green sub-pixels, and the blue sub-pixels.

[0026] Preferably, in the manufacturing method of the monochromatic blue light LED display of the present invention, the sequentially arranged red sub-pixels, green sub-pixels, and blue sub-pixels form a light conversion pixel array, so that a plurality of the light conversion pixel arrays are sequentially arranged on the first surface.

[0027] Preferably, in the method for manufacturing a monochromatic blue LED display according to the present invention, "bonding the blue LED light board to the first surface of the glass plate" in step (5) specifically includes: forming a black rubber strip between adjacent blue LEDs, then pasting the black rubber strip on the metal mask layer on the first surface of the glass plate, and making the black rubber strip located between the sequentially arranged red sub-pixels, green sub-pixels, and blue sub-pixels.

[0028] Preferably, in the method for manufacturing a monochromatic blue LED display according to the present invention, step (6) specifically includes: filling a red quantum dot light-emitting material in the second groove corresponding to the red sub-pixel to form the red photoresist layer, and filling a green quantum dot light-emitting material in the second groove corresponding to the green sub-pixel to form the green photoresist layer.

[0029] Preferably, in the method for manufacturing a monochromatic blue LED display according to the present invention, the diameter of the second groove is smaller than the diameter of the first groove, and the depth of the first groove is greater than 50 microns.

[0030] Compared with the prior art, the monochromatic blue LED display of the present invention has the following technical effects:

[0031] First, a metal mask layer is covered on the area of the first surface of the glass plate that is not the first groove. The metal mask layer effectively blocks the blue light emitted by the LED from entering adjacent sub-pixels, thereby greatly reducing the problem of light crosstalk.

[0032] Second, second grooves are provided on the second surface of the glass plate opposite to the red sub-pixels and the green sub-pixels, and a red photoresist layer opposite to the red sub-pixels and a green photoresist layer opposite to the green sub-pixels are provided in the second grooves. Therefore, the blue light that is not completely absorbed by the blue sub-pixels and green sub-pixels below in the front view direction can be absorbed, so that the light energy emitted by the LED can be fully converted into red light or green light, thereby solving the problem of viewing angle color difference between the front view and the side view.

[0033] Third, by etching the first groove on the first surface of the glass plate and the second groove on the second surface, and sequentially arranging the red sub-pixel, green sub-pixel, and blue sub-pixel in the first groove by filling in the order of red, green, and blue, and arranging the red photoresist layer in the second groove opposite to the red sub-pixel and the green photoresist layer in the second groove opposite to the green sub-pixel by filling. Therefore, compared with the prior art method of three-time evaporation coating, this production method is simpler and the overall production cost is reduced.

[0034] Correspondingly, the method for manufacturing a monochromatic blue LED display according to the present invention also has the same technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic cross-sectional view of a monochromatic blue LED display in the prior art.

[0036] Figure 2 It is a schematic cross-sectional view of a monochromatic blue LED display in the present invention.

[0037] Figure 3 It is a schematic view of the state of making a metal mask on a glass plate in the present invention.

[0038] Figure 4 It is Figure 3 a schematic view of the state where a second groove is etched in the glass plate in

[0039] Figure 5 It is Figure 4 a schematic view of the state where a first groove is etched in the glass plate in

[0040] Figure 6 It is Figure 5 a schematic view of the state after the first groove of the glass plate in

[0041] Figure 7 It is Figure 6 a schematic view of the state after the glass plate in

[0042] Figure 8 is Figure 7 a schematic view of the state after the second groove of the glass plate in

[0043] Figure 9 It is Figure 8 a schematic view of the state where a protective film is covered on the second surface of the glass plate in Detailed implementation manners

[0044] Now, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals represent like elements. It should be noted that the orientation descriptions involved in the present invention, such as up, down, left, right, front, back, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0045] First, in combination with Figure 2-9As shown in the figure, the monochromatic blue light LED display 100 provided by the present invention includes a glass plate 110, a blue light LED light board 150, and a protective film 160. Among them, a plurality of blue light emitting diodes 151 (blue LEDs) arranged in an array are provided on the blue light LED light board 150. The setting method of the blue LEDs is a conventional method in the art and will not be described in detail.

[0046] Referring to Figure 5 As shown in the figure, the glass plate 110 has opposite first surface 111 and second surface 112. A plurality of first grooves 1111 arranged in an array are provided on its first surface 111. The arrangement of the first grooves 1111 corresponds to the arrangement of the blue LEDs, and the area on the first surface 111 that is not the first grooves 1111 is covered with a metal mask layer 120 (see Figure 5 ). And, red sub-pixels 131, green sub-pixels 132, and blue sub-pixels 133 are cyclically arranged in the sequentially arranged first grooves 1111 in the order of red, green, and blue. Specifically, the red sub-pixel 131, the green sub-pixel 132, and the blue sub-pixel 133 are sequentially arranged in three sequentially arranged first grooves 1111, so as to obtain a light conversion pixel array 130. Referring to Figure 6 As shown in the figure, then, the red sub-pixel 131, the green sub-pixel 132, and the blue sub-pixel 133 are sequentially arranged in the next three sequentially arranged first grooves 1111, and the next light conversion pixel array 130 is obtained. Referring to Figure 6 As shown in the figure. By setting in such a cycle, a plurality of light conversion pixel arrays 130 are cyclically provided on the first surface 111 of the glass plate 110.

[0047] Second grooves 1121 are provided on the second surface 112 of the glass plate 110 opposite to the red sub-pixel 131 and the green sub-pixel 132. And, a red photoresist layer 141 is provided in the second groove 1121 opposite to the red sub-pixel 131, and a green photoresist layer 142 is provided in the second groove 1121 opposite to the green sub-pixel 132. Referring to Figure 8 As shown in the figure.

[0048] Referring again to Figure 2 As shown in the figure, the blue light LED light board 150 is pasted to the metal mask layer 120 on the glass plate 110, and the blue LEDs are aligned with the red sub-pixel 131, the blue sub-pixel 133, and the green sub-pixel 132. The protective film 160 is attached to the second surface 112 of the glass plate 110 to protect the red photoresist layer 141 and the green photoresist layer 142 from being damaged by water and oxygen in the outside world.

[0049] Combined with Figure 2 , Figure 5-6As shown, a plurality of columns of first grooves 1111 are provided on the first surface 111 of the glass plate 110. The distance L3 between two adjacent columns of first grooves 1111 is preferably equal, and each column is provided with a plurality of first grooves 1111, so that the first grooves 1111 provided on the first surface 111 of the glass plate 110 are arranged in an array. Moreover, three columns of first grooves 1111 arranged in sequence form a sub-array. Within each sub-array, the first groove 1111 in the first column is filled with a red quantum dot light-emitting material to form the red sub-pixel 131, the first groove 1111 in the second column is filled with a green quantum dot light-emitting material to form the green sub-pixel 132, and the first groove 1111 in the third column is filled with a transparent glue to form the blue sub-pixel 133. See Figure 6 shown. Therefore, the red sub-pixel 131, green sub-pixel 132, and blue sub-pixel 133 arranged in sequence within each sub-array form a light conversion pixel array 130, as Figure 6 shown. Then, within the next sub-array, the red sub-pixel 131, green sub-pixel 132, and blue sub-pixel 133 are formed again in the order of red, green, and blue to obtain the next light conversion pixel array 130. By setting in such a cycle, a plurality of light conversion pixel arrays 130 are cyclically provided on the first surface 111 of the glass plate 110. And by means of opening the first grooves 1111 and filling them with quantum dot light-emitting materials or transparent glue, the red sub-pixel 131, green sub-pixel 132, and blue sub-pixel 133 are directly formed, and the production method is simpler, which is beneficial to reducing production costs.

[0050] Combined again with Figure 2 、 Figure 4-6 、 Figure 8 shown, a plurality of columns of second grooves 1121 are provided on the second surface 112 of the glass plate 110. The second grooves 1121 are provided corresponding to the red sub-pixel 131 and green sub-pixel 132. Specifically, the second grooves 1121 are opened on the second surface 112 of the glass plate 110 corresponding to the first grooves 1111 for setting the red sub-pixel 131 and green sub-pixel 132, while no second grooves 1121 are provided at the position corresponding to the setting of the blue sub-pixel 133, as Figure 5 shown. Therefore, two columns of second grooves 1121 arranged in sequence form a sub-array, and one column of first grooves 1111 in each sub-array is staggered from the second grooves 1121. Then, the second groove 1121 corresponding to the red sub-pixel 131 is filled with a red quantum dot light-emitting material to form the red photoresist layer 141, and the second groove 1121 corresponding to the green sub-pixel 132 is filled with a green quantum dot light-emitting material to form the green photoresist layer 142, so as to obtain a photoresist layer array 140, as Figure 8As shown. By setting in such a cycle, a plurality of photoresist layer arrays 140 are cyclically provided on the second surface 112 of the glass plate 110. The photoresist layer is formed by opening the second groove 1121 and filling it with quantum dot light-emitting materials. Compared with the evaporation coating method, the production method is simpler, which is beneficial to reducing the production cost.

[0051] Referring to Figure 2 As shown, in the present invention, a protective film 160 is attached to the second surface 112 of the glass plate 110, so as to protect the quantum dot materials filled in the second groove 1121 from being damaged by external water and oxygen.

[0052] Continuing to combine Figure 2 、 Figure 4-5 As shown, in the present invention, the first groove 1111 is formed by etching on the first surface 111 of the glass plate 110, and the second groove 1121 is formed by etching on the second surface 112 of the glass plate 110. The production method is simpler, thus reducing the production cost. Moreover, the first groove 1111 is fabricated by chemical etching, so that the depth of the first groove 1111 can be greater than 50 microns. Therefore, sufficient quantum dot light-emitting materials can be accommodated to absorb blue light, enabling the light emitted by the LED to be fully converted into red light or green light. Referring again to Figure 5 As shown, the diameter d2 of the second groove 1121 is smaller than the diameter d1 of the first groove 1111. Therefore, the quantum dot light-emitting materials filled in the second groove 1121 can absorb the blue light that has not been completely absorbed by the underlying red sub-pixels 131 and green sub-pixels 132 in the front view direction, enabling the light emitted by the LED to be fully converted into red light or green light, thereby solving the viewing angle color difference problem between the front view and the side view.

[0053] Referring again to Figure 2 As shown, in an embodiment of the present invention, the monochromatic blue light LED display 100 further includes a black glue layer 170. The black glue layer 170 includes a plurality of black glue strips 171. The black glue strips 171 are formed between adjacent blue light LEDs and adhered to the blue light LED lamp board 150, and then the black glue strips 171 are adhered to the metal mask layer 120 of the glass plate 110. And the black glue strips 171 are located between the red sub-pixels 131, green sub-pixels 132, and blue sub-pixels 133, thereby realizing the bonding between the blue light LED lamp board 150 and the glass plate 110. The setting of the black glue strips 171 and the metal mask layer 120 can effectively block the blue light emitted by the LED from entering adjacent sub-pixels, thereby greatly reducing the light crosstalk problem.

[0054] In the present invention, the black glue strips 171 can be formed by black glue or black adhesive tape, etc., and no specific limitation is made here. It can be understood that the blue light LED lamp board 150 and the glass plate 110 are not limited to being adhered by the black glue strips 171. Of course, other methods can also be used for adhesion.

[0055] Combined with the following Figure 2-9 As shown, the present invention also provides a manufacturing method for a monochromatic blue light LED display, and the method includes the following steps:

[0056] S01. Provide a glass plate 110, and fabricate a metal mask layer 120` on the second surface 112 of the glass plate 110;

[0057] Specifically refer to Figure 3 As shown, the metal mask layer 120` is formed on the second surface 112 of the glass plate 110, and the manufacturing method of the metal mask layer 120` is a conventional method in the art and will not be described in detail. After fabrication, a plurality of through-hole sub-arrays are formed on the metal mask layer 120` at a preset spacing. The spacing between two adjacent through-hole sub-arrays is L1. Within each sub-array, there are two columns of through-holes 121`. The spacing between the two columns of through-holes 121` is L2, and this spacing L2 is less than the aforementioned spacing L1. Moreover, the aforementioned spacing L2 is set according to the spacing of the blue light LEDs arranged in an array on the specific blue light LED board 150.

[0058] S02. Use hydrofluoric acid to etch the second surface 112 of the glass plate 110 to obtain a second groove 1121, and then remove the metal mask layer 120`;

[0059] Refer to Figure 4 As shown, use hydrofluoric acid to etch the second surface 112 of the glass plate 110, so as to obtain a second groove 1121 at the position corresponding to the through-hole 121`, that is, a plurality of second groove sub-arrays are obtained on the second surface 112 of the glass plate 110, and each second groove sub-array has two columns of second grooves 1121. Moreover, the spacing between two adjacent second groove sub-arrays is L1, and the spacing between the two columns of second grooves 1121 within each second groove sub-array is L2, and this spacing L2 is less than the aforementioned spacing L1.

[0060] Then, use etching or other means to remove the metal mask layer 120`, and the state after removal is as Figure 4 shown.

[0061] S03. Fabricate a metal mask layer 120 on the first surface 111 of the glass plate 110, and use hydrofluoric acid to etch the first surface 111 of the glass plate 110 to obtain a first groove 1111 opposite to the second groove 1121 and a first groove 1111 staggered from the second groove 1121;

[0062] Specifically refer to Figure 5As shown in the figure, a metal mask layer 120 is fabricated on the first surface 111 of the glass plate 110. The fabrication method of the metal mask layer 120 is a conventional method in the art and will not be described in detail herein. After fabrication, the metal mask layer 120 has a plurality of through-hole sub-arrays, and the distance L3 between two adjacent through-hole sub-arrays is equal. In each sub-array, there are three columns of through-holes, where two columns of through-holes respectively correspond to the second grooves 1121, and the other column of through-holes corresponds to the position between two adjacent second-groove sub-arrays. That is, this column of through-holes and the two columns of second grooves 1121 are staggered in the vertical direction. In addition, the distances between the three columns of through-holes are equal and are all L3, and the distances between the three columns of through-holes correspond to the distances between the blue LEDS arranged in an array on the blue LED light board 150. More specifically, the aperture diameter of each through-hole is larger than the diameter d2 of the aforementioned second groove 1121.

[0063] Then, the first surface 111 of the glass plate 110 is etched with hydrofluoric acid to obtain first grooves 1111 at the positions corresponding to the through-holes. That is, a plurality of first-groove sub-arrays are obtained on the first surface 111 of the glass plate 110, and each first-groove sub-array has three columns of first grooves 1111. Moreover, the distance between two adjacent first-groove sub-arrays is L3, and the distance between two adjacent columns of first grooves 1111 within each first-groove sub-array is also L3. In other words, the distances between the columns of first grooves 1111 formed on the first surface 111 are equal, and the distances between the columns of first grooves 1111 correspond to the distances between the blue LEDS arranged in an array on the blue LED light board 150. That is, after the glass plate 11 is adhered to the blue LED light board 150, each blue LED can be directly opposite to each first groove 1111, as Figure 7 shown.

[0064] Continue to refer to Figure 5 shown. In the present invention, the aperture diameter d1 of the first groove 1111 is larger than the diameter d2 of the aforementioned second groove 1121.

[0065] In this step, after the etching is completed, the metal mask layer 120 is not processed any further, so that the metal mask layer 120 is retained on the first surface 111 of the glass plate 110. Therefore, the area on the first surface 111 of the glass plate 110 that is not the first groove 1111 is covered with the metal mask layer 120.

[0066] Continue to refer to Figure 5 shown. In the present invention, since the first grooves 1111 are formed by etching, the depth of the first grooves 1111 is easily greater than 50 microns, so that sufficient quantum dot luminescent materials (details will be described later) can be accommodated to absorb blue light, and the light energy emitted by the blue LEDS can be fully converted into red light or green light.

[0067] S04. Set the red sub-pixels 131, green sub-pixels 132, and blue sub-pixels 133 in a cycle in the first grooves 1111 arranged in sequence in the order of red, green, and blue;

[0068] Refer to Figure 6 As shown, three columns of the first grooves 1111 arranged in sequence form a first groove sub-array. Fill the first groove 1111 in the first column with a red quantum dot light-emitting material to form the red sub-pixel 131, then fill the first groove 1111 in the second column with a green quantum dot light-emitting material to form the green sub-pixel 132, and then fill the first groove 1111 in the third column with a transparent glue to form the blue sub-pixel 133. In this way, the red sub-pixel 131, green sub-pixel 132, and blue sub-pixel 133 are respectively formed in three columns of the first grooves 1111 arranged in sequence, thereby obtaining a light conversion pixel array 130.

[0069] Next, in the next first groove sub-array, form the red sub-pixel 131, green sub-pixel 132, and blue sub-pixel 133 again in the order of red, green, and blue to obtain the next light conversion pixel array 130, as Figure 6 shown. Set in such a cycle so that the first surface 111 of the glass plate 110 is cyclically provided with a plurality of light conversion pixel arrays 130.

[0070] In the present invention, by opening the first grooves 1111 and directly forming the red sub-pixels 131, green sub-pixels 132, and blue sub-pixels 133 by filling quantum dot light-emitting materials or transparent glue, the production method is simpler, which is conducive to reducing production costs.

[0071] S05. Provide a blue LED light board 150, on which a plurality of blue LEDs are arranged in an array. Bond the blue LED light board 150 to the first surface 111 of the glass plate 110, and make the blue LEDs face the red sub-pixels 131, blue sub-pixels 133, and green sub-pixels 132;

[0072] Refer to Figure 7 As shown, in the present invention, the blue LED light board 150 is provided with multiple columns of blue LEDs, and the distance between adjacent two columns of blue LEDs corresponds to the distance L3 between adjacent two columns of the first grooves 1111. Then bond the blue LED light board 150 to the metal mask layer 120 of the glass plate 110, and make the blue LEDs face the red sub-pixels 131, blue sub-pixels 133, and green sub-pixels 132.

[0073] In a preferred embodiment of the present invention, the blue LED light board 150 is adhered to the glass plate 110 through a black adhesive layer 170. More specifically, a black adhesive strip 171 is formed between adjacent blue LEDs. The black adhesive strip 171 can be formed by black glue or black adhesive tape, etc., and no specific limitation is made here. Then the black adhesive strip 171 is adhered to the metal mask layer 120 on the first surface 111 of the glass plate 110, so as to adhere the blue LED light board 150 and the glass plate 110. At this time, the black adhesive strip 171 is located between the red sub-pixels 131, green sub-pixels 132, and blue sub-pixels 133 arranged in sequence. The overall black adhesive strip 171 forms a black adhesive layer 170. Through the arrangement of the black adhesive strip 171 and the metal mask layer 120, the present invention can effectively block the blue light emitted by the LED from entering the adjacent sub-pixels, thereby greatly reducing the problem of optical crosstalk.

[0074] Understandably, the blue LED light board 150 and the glass plate 110 are not limited to being adhered through the black adhesive strip 171, and of course, other methods can also be used for adhesion.

[0075] S06. A red photoresist layer 141 is provided in the second groove 1121 corresponding to the red sub-pixel 131, and a green photoresist layer 142 is provided in the second groove 1121 corresponding to the green sub-pixel 132;

[0076] See Figure 8 As shown, a red quantum dot light-emitting material is filled in the second groove 1121 corresponding to the red sub-pixel 131 to form the red photoresist layer 141, that is, the red sub-pixel 131 and the red photoresist layer 141 use the same material; then a green quantum dot light-emitting material is filled in the second groove 1121 corresponding to the green sub-pixel 132 to form the green photoresist layer 142, so that the green sub-pixel 132 and the green photoresist layer 142 use the same material, thereby obtaining a photoresist layer array 140. Set in this way in a cycle, so that the second surface 112 of the glass plate 110 is provided with a plurality of photoresist layer arrays 140 in a cycle.

[0077] In the present invention, the photoresist layer is formed by opening the second groove 1121 and filling the quantum dot light-emitting material. Compared with the evaporation method, the production method is simpler, which is beneficial to reducing the production cost.

[0078] Combined with Figure 5-8 As shown, in the present invention, since the diameter d2 of the second groove 1121 is smaller than the diameter d1 of the first groove 1111, the quantum dot light-emitting material filled in the second groove 1121 can absorb the blue light that is not completely absorbed by the blue sub-pixel 133 and green sub-pixel 132 below in the front view direction, so that the light energy emitted by the LED can be fully converted into red light or green light.

[0079] S07. Bond a protective film 160 to the second surface 112 of the glass plate 110 to obtain a complete monochromatic blue LED display 100.

[0080] Combine Figure 2 、 Figure 9 As shown, the protective film 160 is pasted on the second surface 112 of the glass plate 110 and covers the red photoresist layer 141 and the green photoresist layer 142. The protective film 160 is used to protect the quantum dot material from being damaged by external water and oxygen. After pasting the protective film 160, the Figure 2 complete monochromatic blue LED display 100 shown is obtained.

[0081] In summary, the monochromatic blue LED display 100 of the present invention has the following technical effects:

[0082] First, a metal mask layer 120 is covered on the area of the first surface 111 of the glass plate 110 that is not the first groove 1111. The metal mask layer 120 effectively blocks the blue light emitted by the LED from entering the adjacent sub-pixels, thereby greatly reducing the problem of optical crosstalk.

[0083] Second, a second groove 1121 is provided on the second surface 112 of the glass plate 110 opposite to the red sub-pixel 131 and the green sub-pixel 132. A red photoresist layer 141 opposite to the red sub-pixel 131 and a green photoresist layer 142 opposite to the green sub-pixel 132 are provided in the second groove 1121. Therefore, the blue light that is not completely absorbed by the blue sub-pixel 133 and the green sub-pixel 132 below in the front view direction can be absorbed, so that the light energy emitted by the LED can be fully converted into red light or green light, thereby solving the problem of viewing angle color difference between the front view and the side view.

[0084] Third, by etching the first groove 1111 on the first surface 111 of the glass plate 110 and the second groove 1121 on the second surface 112, and filling and circularly setting the red sub-pixel 131, the green sub-pixel 132, and the blue sub-pixel 133 in the first groove 1111 in the order of red, green, and blue, and filling and setting the red photoresist layer 141 in the second groove 1121 opposite to the red sub-pixel 131 and filling and setting the green photoresist layer 142 in the second groove 1121 opposite to the green sub-pixel 132. Therefore, compared with the existing method of triple evaporation, this production method is simpler and the overall production cost is reduced.

[0085] Correspondingly, the method for manufacturing a monochromatic blue LED display of the present invention also has the same technical effects.

[0086] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A monochromatic blue light LED display, characterized in that, include: A glass plate, comprising a first surface and a second surface facing each other, wherein the first surface is provided with first grooves, the spacing between the first grooves in each column is equal, the depth of the first grooves is greater than 50 microns, the area on the first surface other than the first grooves is covered with a metal mask layer, and red light quantum dot luminescent material, green light quantum dot luminescent material, and transparent glue are filled in the first grooves arranged in sequence in the order of red, green, and blue to form red sub-pixels, green sub-pixels, and blue sub-pixels, and the second surface is provided with second grooves facing the red sub-pixels and the green sub-pixels, the diameter of the second grooves is smaller than the diameter of the first grooves, the second grooves corresponding to the red sub-pixels are filled with red light quantum dot luminescent material to form a red photoresist layer, and the second grooves corresponding to the green sub-pixels are filled with green light quantum dot luminescent material to form a green photoresist layer; A blue LED light board, on which a plurality of blue LEDs arranged in an array are provided, the blue LED light board and the metal mask layer are adhered to each other, and the blue LEDs are directly opposite to the red sub-pixel, the blue sub-pixel, and the green sub-pixel; A protective film is attached to the second surface.

2. The monochromatic blue LED display according to claim 1, wherein It also includes a black glue layer, which includes a plurality of black glue strips. The black glue strips are arranged between adjacent blue light LEDs and adhere the blue light LED lamp board and the metal mask layer.

3. The monochromatic blue light LED display according to any one of claims 1-2, characterized in that The red sub-pixel, the green sub-pixel, and the blue sub-pixel arranged in sequence form a light conversion pixel array, so that the first surface is provided with a plurality of the light conversion pixel arrays.

4. A method for manufacturing a monochromatic blue light LED display, characterized in that, The steps include: (1) providing a glass plate, and forming a metal mask layer on a second surface of the glass plate; (2) etching the second surface of the glass plate using hydrofluoric acid to obtain a second groove, and then removing the metal mask layer; (3) forming a metal mask layer on the first surface of the glass plate, and etching the first surface of the glass plate using hydrofluoric acid to obtain a first groove directly facing the second groove and a first groove staggered from the second groove; wherein the spacing between the first grooves in each column is equal, the depth of the first groove is greater than 50 microns, and the diameter of the second groove is smaller than the diameter of the first groove; (4) cyclically arranging red sub-pixels, green sub-pixels, and blue sub-pixels in the first grooves arranged sequentially in the order of red, green, and blue; (5) providing a blue LED light board on which a plurality of blue LEDs arranged in an array are disposed, and laminating the blue LED light board to the first surface of the glass plate, and making the blue LEDs face the red sub-pixels, the blue sub-pixels, and the green sub-pixels; (6) disposing a red photoresist layer in the second groove corresponding to the red sub-pixel, and disposing a green photoresist layer in the second groove corresponding to the green sub-pixel; (7) A protective film is laminated on the second surface of the glass plate to obtain a complete monochrome blue light LED display.

5. The manufacturing method of the monochromatic blue light LED display according to claim 4, characterized in that, The specific steps of step (4) are as follows: successively fill the first grooves arranged continuously with a red quantum dot light-emitting material, a green quantum dot light-emitting material, and a transparent glue in the order of red, green, and blue to form the red sub-pixel, the green sub-pixel, and the blue sub-pixel.

6. The manufacturing method of the monochromatic blue light LED display according to claim 4 or 5, characterized in that, The successively arranged red sub-pixels, green sub-pixels, and blue sub-pixels form a light conversion pixel array, so that a plurality of the light conversion pixel arrays are successively arranged on the first surface.

7. The manufacturing method of the monochromatic blue light LED display according to claim 4, characterized in that, In step (5), "bonding the blue LED light board to the first surface of the glass plate" specifically means: forming a black adhesive strip between adjacent blue LEDs, and then pasting the black adhesive strip on the metal mask layer on the first surface of the glass plate, and making the black adhesive strip located between the successively arranged red sub-pixels, green sub-pixels, and blue sub-pixels.

8. The manufacturing method of the monochromatic blue light LED display according to claim 4, characterized in that, The specific steps of step (6) are as follows: fill a red quantum dot light-emitting material in the second groove corresponding to the red sub-pixel to form the red photoresist layer, and fill a green quantum dot light-emitting material in the second groove corresponding to the green sub-pixel to form the green photoresist layer.

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