CN111833723B - Display panel, display device and manufacturing method of quantum dot color filter - Google Patents
Display panel, display device and manufacturing method of quantum dot color filter Download PDFInfo
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Abstract
The application discloses a display panel, a display device and a manufacturing method of a quantum dot color filter, wherein the display panel comprises an excitation light source and the quantum dot color filter, the quantum dot color filter comprises a first transparent substrate, a second transparent substrate, a plurality of first quantum dot conversion blocks and a plurality of second quantum dot conversion blocks, the plurality of first quantum dot conversion blocks are arranged on the same side surface of the first transparent substrate at intervals, and the plurality of second quantum dot conversion blocks are arranged on the same side surface of the second transparent substrate at intervals; the excitation light source is used for irradiating the first quantum dot conversion block and the second quantum dot conversion block to generate light rays with different colors. According to the display device, the first quantum dot conversion block is arranged on the first transparent substrate, the second quantum dot conversion block is arranged on the second transparent substrate, and the first quantum dot conversion block, the second quantum dot conversion block and the second quantum dot conversion block are independent and do not interfere with each other, so that the process flow is simplified, and the process cost is reduced.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display device, and a method for manufacturing a quantum dot color filter.
Background
With the expansion of the application field of display products and the continuous development of display technologies, higher requirements on the aspects of high resolution, wide color gamut, low cost and the like are provided for display applications from LCD to OLED, to Micro-LED and QD-LED. In the aspect of colorization display, a traditional LCD is generally realized by adopting a white light plus a color filter, an OLED can be realized by evaporating or printing RGB (red, green and blue) three-color pixels, and a Micro-LED can be realized by adopting an RGB chip for multiple transfer. In order to improve the display effect and reduce the cost, the technical scheme of 'blue light + light conversion film' is more adopted in the new colorized display.
The inventor of the application finds that the light conversion film is optimally a quantum dot color filter in long-term research and development. The resolution is high and the color gamut is wide. In the existing quantum dot color filter, a quantum dot conversion block of one color needs to be manufactured on a transparent substrate, and then a quantum dot conversion block of another color needs to be manufactured on the basis, and the manufacturing can be completed at least twice. Moreover, after the quantum dot conversion block of one color is manufactured, the second quantum dot conversion block can be manufactured only after the quantum dot conversion block is stable in shape.
Therefore, the manufacturing process of the quantum dot color filter in the current display panel is complex and the processing cost is high.
Disclosure of Invention
The application mainly provides a display panel, a display device and a manufacturing method of a quantum dot color filter, and aims to solve the problems that a manufacturing process flow of the quantum dot color filter in the display panel is complex and processing cost is high.
In order to solve the above technical problem, the first technical solution adopted by the present application is: the display panel comprises an excitation light source and a quantum dot color filter, wherein the quantum dot color filter comprises a first transparent substrate, a second transparent substrate, a plurality of first quantum dot conversion blocks and a plurality of second quantum dot conversion blocks, the first quantum dot conversion blocks are arranged on the same side surface of the first transparent substrate at intervals, and the second quantum dot conversion blocks are arranged on the same side surface of the second transparent substrate at intervals; the first transparent substrate and the second transparent substrate are arranged in parallel and are fixed in an adhering mode through an adhesive material, and in at least part of the first quantum dot conversion blocks, the projection of each first quantum dot conversion block on the first transparent substrate or the second transparent substrate is positioned between the projections of the adjacent second quantum dot conversion blocks on the first transparent substrate or the second transparent substrate; the excitation light source is used for irradiating the first quantum dot conversion block and the second quantum dot conversion block to generate light rays with different colors.
The first transparent substrate and the second transparent substrate which are fixedly bonded belong to two parts of a flexible transparent substrate, and the flexible transparent substrate is folded and bonded to form the structural form of the first transparent substrate and the second transparent substrate.
The first quantum dot conversion block and the second quantum dot conversion block are arranged between the first transparent substrate and the second transparent substrate and are arranged in parallel and alternately in the same layer.
The bonding material is arranged at the edge of the flexible transparent substrate, and the flexible transparent substrate is folded by taking the surface of one side provided with the first quantum dot conversion block, the second quantum dot conversion block and the bonding material as an inner surface, so that an inner space formed after the flexible transparent substrate is folded in half is sealed by the bonding material.
The first quantum dot conversion block is arranged between the first transparent substrate and the second transparent substrate, the second quantum dot conversion block is arranged on one side, far away from the first transparent substrate, of the second transparent substrate, a transparent packaging film is arranged on one side, far away from the second transparent substrate, of the second quantum dot conversion block, and the transparent packaging film covers the second quantum dot conversion block and is connected with the second transparent substrate in a bonding mode.
The bonding material is arranged around the edge of the inner surface of the flexible transparent substrate which is folded in half, so that the inner space formed after the flexible transparent substrate is folded in half is sealed by the bonding material.
The first quantum dot conversion block and the second quantum dot conversion block are arranged between the first transparent substrate and the second transparent substrate, the first transparent substrate and the second transparent substrate are mutually independent flexible transparent substrates, and the bonding material is arranged around the edges of the inner surfaces, opposite to the first transparent substrate and the second transparent substrate, of the first transparent substrate and the second transparent substrate, so that the inner space formed by the first transparent substrate and the second transparent substrate is sealed by the bonding material.
The first quantum dot conversion block is arranged between the first transparent substrate and the second transparent substrate, the second quantum dot conversion block is arranged on one side, far away from the first transparent substrate, of the second transparent substrate, the first transparent substrate and the second transparent substrate are mutually independent flexible transparent substrates, the bonding material surrounds the first transparent substrate, the edge of the inner surface, opposite to the inner surface, of the second transparent substrate is arranged, the inner space formed by the first transparent substrate and the second transparent substrate is sealed by the bonding material, a transparent packaging film is arranged on one side, far away from the second transparent substrate, of the second quantum dot conversion block, and the transparent packaging film covers the second quantum dot conversion block and is connected with the second transparent substrate in a bonding mode.
In order to solve the above technical problem, the second technical solution adopted by the present application is: there is provided a display device comprising a housing and a display panel as claimed in any one of the above, the display panel being located within the housing.
In order to solve the above technical problem, the third technical solution adopted by the present application is: a method for manufacturing a quantum dot color filter is provided, which comprises the following steps: providing a transparent substrate; manufacturing a plurality of first quantum dot conversion blocks on the upper surface of one side of the transparent substrate, and manufacturing a plurality of second quantum dot conversion blocks on the upper surface or the lower surface of the other side of the transparent substrate; and bending the transparent substrate to form two layers of transparent substrates, so that the projection of the first quantum dot conversion block on the first transparent substrate or the second transparent substrate is positioned between the projections of the adjacent second quantum dot conversion blocks on the first transparent substrate or the second transparent substrate in at least part of the first quantum dot conversion blocks.
The beneficial effect of this application is: different from the prior art, the display panel in the display device of the application has the advantages that the first quantum dot conversion block is arranged on the first transparent substrate, and the second quantum dot conversion block is arranged on the second transparent substrate and is independent of each other, so that the process flow is simplified, and the process cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present application;
FIG. 2 is a flow chart of a method of fabricating the quantum dot color filter of FIG. 1;
FIG. 3a is a schematic structural diagram of the quantum dot color filter corresponding to step 201 in FIG. 2;
FIG. 3b is a schematic structural diagram of the quantum dot color filter corresponding to step 202 in FIG. 2;
FIG. 3c is a schematic structural diagram of the quantum dot color filter corresponding to step 203 in FIG. 2;
FIG. 4 is a schematic cross-sectional view of a second embodiment of a display panel of the present application;
FIG. 5 is a schematic cross-sectional view of a third embodiment of a display panel of the present application;
FIG. 6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of a fifth embodiment of a display panel of the present application;
FIG. 8 is a method of fabricating a quantum dot color filter of the display panel of FIG. 7;
FIG. 9 is a schematic structural diagram of an embodiment of a display device according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present application. In the present embodiment, the display panel 10 includes an excitation light source 12 and a quantum dot color filter 11.
The quantum dot color filter 11 includes a first transparent substrate 111, a second transparent substrate 113, a plurality of first quantum dot conversion blocks 112, and a plurality of second quantum dot conversion blocks 114. The plurality of first quantum dot conversion blocks 112 are disposed at intervals on the same side surface of the first transparent substrate 111, and the plurality of second quantum dot conversion blocks 114 are disposed at intervals on the same side surface of the second transparent substrate 113.
The first transparent substrate 111 and the second transparent substrate 113 are disposed in parallel and are bonded and fixed by an adhesive material 116.
In one application example, the first transparent substrate 111 and the second transparent substrate 113 belong to two parts of one flexible transparent substrate, and the first transparent substrate 111 and the second transparent substrate 113 which are bonded and fixed are structurally formed by folding and bonding the flexible transparent substrate in half. Thus, one edge of the first transparent substrate 111 and the second transparent substrate 113 is connected by the bending portion 115. An adhesive material 116 is disposed around the edge of the flexible transparent substrate. The flexible transparent substrate is folded by taking one side surface provided with the first quantum dot conversion block 112, the second quantum dot conversion block 114 and the bonding material as an inner surface. That is, the adhesive material 116 is disposed around the edge of the inner surface of the flexible transparent substrate folded in half so that the inner space formed after the flexible transparent substrate is folded in half is sealed by the adhesive material 116. The first quantum dot conversion blocks 112 and the second quantum dot conversion blocks 114 are arranged between the first transparent substrate 111 and the second transparent substrate 113, and are arranged side by side alternately in the same layer, and in at least part of the first quantum dot conversion blocks 112, the projection of each first quantum dot conversion block 112 on the first transparent substrate 111 or the second transparent substrate 113 is positioned between the projections of the adjacent second quantum dot conversion blocks 114 on the first transparent substrate 111 or the second transparent substrate 113.
The excitation light source 12 is used to illuminate the first quantum dot conversion block 112 and the second quantum dot conversion block 114 to generate light rays with different colors. The excitation light source 12 may be, for example, a blue emitting pixel, while the first quantum dot conversion block 112 may be a red quantum dot conversion block and the second quantum dot conversion block 114 may be a green quantum dot conversion block. Or, the colors of the first quantum dot conversion block 112 and the second quantum dot conversion block 114 may be interchanged, and even quantum dot conversion blocks of other colors may be adjusted according to actual needs. In addition, the excitation light sources 12 may be disposed on the backplane circuit 13.
In the present embodiment, the display panel 10 further includes a light-shielding matrix 117. The light shielding matrix 117 is disposed around the first quantum dot conversion block 112 and the second quantum dot conversion block 114 to define the patterns of the first quantum dot conversion block 112 and the second quantum dot conversion block 114, so as to improve the quality of the first quantum dot conversion block 112 and the second quantum dot conversion block 114 and eliminate the color mixture caused by the mutual influence of the first quantum dot conversion block 112 and the second quantum dot conversion block 114. The light-shielding matrix 117 may be a black matrix array, or may be a light-shielding grid made of other light-shielding materials.
The excitation light source 12 is a blue light emitting pixel, the first quantum dot conversion block 112 is a red quantum dot conversion block, and the second quantum dot conversion block 114 is a green quantum dot conversion block. During operation, the excitation light source 12 emits blue light, the first quantum dot conversion block 112 converts the blue light into red light and emits the red light, the second quantum dot conversion block 114 converts the blue light into green light and emits the green light, and the interval between the first quantum dot conversion block 112 and the second quantum dot conversion block 114 still emits the blue light, so that the display panel 10 can emit the red, green and blue light.
The display panel 10 of this embodiment can manufacture the array patterns of the first quantum dot conversion block 112 and the second quantum dot conversion block 114 in different areas on the same flexible transparent substrate at one time, and the array patterns are adhered and fixed by the adhesive material 116 after being folded, so as to directly form the quantum dot color filter 11, the setting and patterning processes of the first quantum dot conversion block 112 and the second quantum dot conversion block 114 are not affected by each other, the influence of the process on the quantum dot light emission performance is reduced, and the process flow and the processing cost are reduced.
Referring to fig. 2 and fig. 3a to 3c, fig. 2 is a flow chart of a method for fabricating the quantum dot color filter of fig. 1; fig. 3a to 3c are schematic structural diagrams of the quantum dot color filters corresponding to steps 201 to 203 in fig. 2. In this embodiment, the method for manufacturing a quantum dot color filter includes:
in step 201, a transparent substrate 101 is provided.
In step 202, a plurality of first quantum dot conversion blocks 112 are fabricated on an upper surface of one side of the transparent substrate 101, and a plurality of second quantum dot conversion blocks 114 are fabricated on an upper surface of the other side of the transparent substrate 101. In addition, in this step, a light-shielding matrix 117 may be formed on the transparent substrate 101. A shading matrix 117 can be manufactured on the transparent substrate 101, and then a first quantum dot conversion block 112 and a second quantum dot conversion block 114 can be manufactured; the first quantum dot conversion block 112 and the second quantum dot conversion block 114 may be fabricated first, and then the light-shielding matrix 117 may be fabricated. The arrangement patterns of the first quantum dot conversion blocks 112 and the second quantum dot conversion blocks 114 may be the same, similar or symmetrical, and are adjusted according to actual needs.
In step 203, an adhesive material 116 is applied to a predetermined position of the transparent substrate 101. The adhesive material 116 is generally coated on the edge of the transparent substrate 101. In the present embodiment, the first quantum dot conversion block 112, the second quantum dot conversion block 114, and the adhesive material are disposed on the same surface of the transparent substrate 101.
In step 204, referring to fig. 1, the transparent substrate 101 is bent to form two layers of transparent substrates 111 and 113, so that the projection of at least a portion of the first quantum dot conversion block 112 on the first transparent substrate 111 or the second transparent substrate 113 is located between the projections of the adjacent second quantum dot conversion blocks 114 on the first transparent substrate 111 or the second transparent substrate 113. At this time, the adhesive material 116 adheres and fixes the two transparent substrates 111 and 113, thereby forming the quantum dot color filter 11.
Through the method, the first quantum dot conversion block 112 and the second quantum dot conversion block 114 can be manufactured at the same time, and then bending is carried out, so that the process flow can be simplified, and the process cost can be reduced.
As shown in fig. 4, fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present application. In the present embodiment, the display panel includes an excitation light source (not shown) and a quantum dot color filter 21. The quantum dot color filter 21 includes a first transparent substrate 211, a second transparent substrate 213, a plurality of first quantum dot conversion blocks 212, and a plurality of second quantum dot conversion blocks 214, and the arrangement of the components is the same as that of the first embodiment. The difference from the first embodiment is that although the first transparent substrate 211 and the second transparent substrate 213 in this embodiment belong to two parts of a flexible transparent substrate, the first transparent substrate 211 and the second transparent substrate 213 that are fixed together are formed by folding and adhering the flexible transparent substrate in half, the bent portion is cut off during the manufacturing process, and an adhesive material 216 is also disposed at the middle position of the flexible transparent substrate during the manufacturing process, so that after the cut-off of the bent portion, the first transparent substrate 211 and the second transparent substrate 213 can be fixed together by the adhesive material 216 at the position, thereby ensuring the structural stability of the quantum dot color filter 21. Preferably, the adhesive material 216 is disposed around edges of the opposite inner surfaces of the first and second transparent substrates 211 and 213, so that an inner space formed by the first and second transparent substrates 211 and 213 is sealed by the adhesive material 216.
Since the display panel in this embodiment does not have the bent portion, the occupied space thereof is smaller than that of the display panel in the first embodiment, and the proportion of the light emitting portion of the display panel can be made larger. In addition, the adhesion between the first transparent substrate 211 and the second transparent substrate 213 can be increased, and the difficulty in bonding the quantum dot color filter 21 to other components can be reduced.
The manufacturing method of the quantum dot color filter in the second embodiment is the same as the manufacturing method of the quantum dot color filter in the first embodiment, and only the position for coating the bonding material is added in step 203, and besides coating the bonding material on the edge of the transparent substrate, the bonding material needs to be coated on the middle position of the transparent substrate, namely between the first quantum dot conversion block and the second quantum dot conversion block. Then, after step 204, a step of cutting off the bending portion of the transparent substrate is added.
As shown in fig. 5, fig. 5 is a schematic cross-sectional structure diagram of a display panel according to a third embodiment of the present application. In the present embodiment, the display panel includes an excitation light source (not shown) and a quantum dot color filter 31.
The quantum dot color filter 31 includes a first transparent substrate 311, a second transparent substrate 313, a plurality of first quantum dot conversion blocks 312, and a plurality of second quantum dot conversion blocks 314. The plurality of first quantum dot conversion blocks 312 are disposed at intervals on the same side surface of the first transparent substrate 311, and the plurality of second quantum dot conversion blocks 314 are disposed at intervals on the same side surface of the second transparent substrate 313.
The first transparent substrate 311 and the second transparent substrate 313 are disposed in parallel and are fixed by an adhesive 316.
In one application example, the first transparent substrate 311 and the second transparent substrate 313 belong to two parts of one flexible transparent substrate, and the first transparent substrate and the second transparent substrate which are bonded and fixed are structurally formed by folding and bonding the flexible transparent substrate. Therefore, one edge of the first transparent substrate 311 and one edge of the second transparent substrate 313 are connected by the bending portion 315. The adhesive material 316 is disposed at the edge of the flexible transparent substrate, and the flexible transparent substrate is folded with the surface of the side where the first quantum dot conversion block 312 is disposed as an inner surface, so that an inner space formed by folding the flexible transparent substrate in half is sealed by the adhesive material 316. The first quantum dot conversion block 312 is disposed between the first transparent substrate 311 and the second transparent substrate 313, and the second quantum dot conversion block 314 is disposed on a side of the second transparent substrate 313 away from the first transparent substrate 311. That is, the first quantum dot conversion block 312 and the second quantum dot conversion block 314 are separated by the second transparent substrate 313. And, in at least some of the first quantum dot conversion blocks 312, the projection of each first quantum dot conversion block 312 on the first transparent substrate 311 or the second transparent substrate 313 is located between the projections of the adjacent second quantum dot conversion blocks 314 on the first transparent substrate 311 or the second transparent substrate 313. In addition, a transparent encapsulating film 318 is arranged on the side of the second quantum dot conversion block 314 away from the second transparent substrate 313, and the transparent encapsulating film 318 is connected with the second transparent substrate 313 in an adhering mode. Also, since the first quantum dot conversion block 312 and the second quantum dot conversion block 314 are not in the same plane in the present embodiment, the first transparent substrate 311 and the second transparent substrate 313 are coated with the adhesive material at different positions. The first transparent substrate 311 is coated with an adhesive material 316 at an edge of a side where the first quantum dot conversion block 312 is disposed, that is, the adhesive material 316 is disposed around an edge of an inner surface of the flexible transparent substrate provided in two halves, so that an inner space formed after the flexible transparent substrate is folded in two is sealed by the adhesive material 316. And the second transparent substrate 313 is required to be coated with the adhesive material 316 around the second quantum dot conversion block 314. Therefore, the adhesive material 316 is provided around the edge of the surface of the second transparent substrate 313 remote from the first transparent substrate 311, so that the contents formed by the second transparent substrate 313, the transparent encapsulating film 318 are sealed by the adhesive material. Preferably, the first transparent substrate 311 is sealed with the second transparent substrate 313 by the adhesive material 316, and the second transparent substrate 313 is sealed with the transparent encapsulation film 318.
The excitation light source is used to illuminate the first quantum dot conversion block 312 and the second quantum dot conversion block 314 to generate light rays with different colors. The excitation light source may be, for example, a blue emitting pixel, while the first quantum dot conversion block 312 may be a red quantum dot conversion block and the second quantum dot conversion block 314 may be a green quantum dot conversion block. Or, the colors of the first quantum dot conversion block 312 and the second quantum dot conversion block 314 may be interchanged, and even quantum dot conversion blocks of other colors may be adjusted according to actual needs.
In this embodiment, the display panel further includes a light-shielding matrix 317. The shading matrix 317 is disposed around the first quantum dot conversion block 312 and the second quantum dot conversion block 314 to define the patterns of the first quantum dot conversion block 312 and the second quantum dot conversion block 314, so as to improve the quality of the first quantum dot conversion block 312 and the second quantum dot conversion block 314 and eliminate the color mixture caused by the mutual influence of the first quantum dot conversion block 312 and the second quantum dot conversion block 314. The light-shielding matrix 317 may be a black matrix array, a light-shielding grid made of other light-shielding materials, or the like.
Take the example where the excitation light source is a blue emitting pixel, the first quantum dot conversion block 312 is a red quantum dot conversion block, and the second quantum dot conversion block 314 is a green quantum dot conversion block. When the display panel works, an excitation light source emits blue light, the first quantum dot conversion block 312 converts the blue light into red light to emit, the second quantum dot conversion block 314 converts the blue light into green light to emit, and the blue light is still transmitted through the interval between the first quantum dot conversion block 312 and the second quantum dot conversion block 314, so that the effect that the display panel can emit the red, green and blue light is achieved.
The display panel of the embodiment can manufacture the array patterns of the first quantum dot conversion block 312 and the second quantum dot conversion block 314 in different areas on the same flexible transparent substrate at one time, and the array patterns are adhered and fixed through the adhesive material 316 after being folded in half to directly form the quantum dot color filter 31, so that the influence of multiple photoetching or printing processes on the quantum dot light-emitting performance is reduced, and the process flow and the processing cost are reduced. In addition, in this embodiment, since the first quantum dot conversion block 312 and the second quantum dot conversion block 314 are not in the same layer, they do not contact each other when being folded, thereby reducing the alignment difficulty of the first quantum dot conversion block 312 and the second quantum dot conversion block 314 during the manufacturing process.
The difference between the method for manufacturing the quantum dot color filter in the present embodiment and the method for manufacturing the quantum dot color filter in the first embodiment is as follows: in step 202, a plurality of first quantum dot conversion blocks are fabricated on an upper surface of one side of a transparent substrate, and a plurality of second quantum dot conversion blocks are fabricated on a lower surface of the other side of the transparent substrate. In step 203, it is necessary to coat the adhesive material on both the upper surface and the lower surface of the transparent substrate. In addition, after step 204, the steps of: and laying a transparent packaging film on one side of the second quantum dot conversion block, which is far away from the transparent substrate, bonding and fixing the transparent packaging film with the bonding material coated on the lower surface of the transparent substrate, and preferably forming a packaging structure.
Through the mode, the first quantum dot conversion block is arranged on the first transparent substrate, and the second quantum dot conversion block is arranged on the second transparent substrate, so that the first quantum dot conversion block and the second quantum dot conversion block are independent and do not interfere with each other, the process flow is simplified, and the process cost is reduced.
As shown in fig. 6, fig. 6 is a schematic cross-sectional structure diagram of a display panel according to a fourth embodiment of the present application. In the present embodiment, the display panel includes an excitation light source (not shown) and a quantum dot color filter 41.
The quantum dot color filter 41 includes a first transparent substrate 411, a second transparent substrate 413, a plurality of first quantum dot conversion blocks 412, and a plurality of second quantum dot conversion blocks 414. A plurality of first quantum dot conversion blocks 412 are disposed at intervals on the same side surface of the first transparent substrate 411, and a plurality of second quantum dot conversion blocks 414 are disposed at intervals on the same side surface of the second transparent substrate 413. The first transparent substrate 411 and the second transparent substrate 413 are disposed in parallel and are fixed by an adhesive material 416. A transparent encapsulating film 418 is arranged on the side of the second quantum dot conversion block 414 away from the second transparent substrate 413, and the transparent encapsulating film 418 is connected with the second transparent substrate 413 in an adhesive mode. Different from the previous embodiment, in the present embodiment, the bent portion is cut off, so that the structure has the advantages of the second embodiment and the third embodiment, the alignment difficulty of the first quantum dot conversion block 412 and the second quantum dot conversion block 414 in the manufacturing process is reduced, the adhesion effect between the first transparent substrate 411 and the second transparent substrate 413 can be increased, and the adhesion difficulty between the quantum dot color filter 41 and other components is reduced.
As shown in fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a fifth embodiment of the display panel of the present application. In the present embodiment, the display panel includes an excitation light source (not shown) and a quantum dot color filter 51.
The quantum dot color filter 51 includes a first transparent substrate 511, a second transparent substrate 513, a plurality of first quantum dot conversion blocks 512, and a plurality of second quantum dot conversion blocks 514. A plurality of first quantum dot conversion blocks 512 are arranged on the same side surface of the first transparent substrate 511 at intervals, and a plurality of second quantum dot conversion blocks 514 are arranged on the same side surface of the second transparent substrate 513 at intervals.
The first transparent substrate 511 and the second transparent substrate 513 are disposed in parallel and are fixed by an adhesive material 516.
In one application example, the first transparent substrate 511 and the second transparent substrate 513 are two flexible transparent substrates independent of each other. The adhesive material 516 is disposed around the edges of the opposite inner surfaces of the first and second transparent substrates 511 and 513 so that the inner space formed by the first and second transparent substrates 511 and 513 is sealed by the adhesive material 516. The adhesive material 516 may be disposed on the first transparent substrate 511, or may be disposed on the second transparent substrate 513. The first quantum dot conversion blocks 512 and the second quantum dot conversion blocks 514 are arranged between the first transparent substrate 511 and the second transparent substrate 513 and are arranged side by side alternately in the same layer, and at least part of the first quantum dot conversion blocks 512 are arranged between the projection of each first quantum dot conversion block 512 on the first transparent substrate 511 or the second transparent substrate 513 and the projection of the adjacent second quantum dot conversion block 514 on the first transparent substrate 511 or the second transparent substrate 513. Also, the first and second quantum dot conversion blocks 512 and 514 are sealed by the first and second transparent substrates 511 and 513 and the adhesive material 516.
The excitation light source is used for irradiating the first quantum dot conversion block 512 and the second quantum dot conversion block 514 to generate light rays with different colors. The excitation light source may be, for example, a blue emitting pixel, while the first quantum dot conversion block 512 may be a red quantum dot conversion block and the second quantum dot conversion block 514 may be a green quantum dot conversion block. Or the colors of the first quantum dot conversion block 512 and the second quantum dot conversion block 514 can be interchanged, and even the quantum dot conversion blocks of other colors can be adjusted according to actual needs.
In this embodiment, the display panel further includes a light-shielding matrix 517. The shading matrix 517 is disposed around the first quantum dot conversion block 512 and the second quantum dot conversion block 514 to define the patterns of the first quantum dot conversion block 512 and the second quantum dot conversion block 514, so as to improve the quality of the first quantum dot conversion block 512 and the second quantum dot conversion block 514 and eliminate the color mixture caused by the mutual influence of the first quantum dot conversion block 512 and the second quantum dot conversion block 514. The light-shielding matrix 517 may be a black matrix array, or may be a light-shielding grid made of other light-shielding materials.
Take the example where the excitation light source is a blue emitting pixel, the first quantum dot conversion block 512 is a red quantum dot conversion block, and the second quantum dot conversion block 514 is a green quantum dot conversion block. When the display panel works, an excitation light source emits blue light, the first quantum dot conversion block 512 converts the blue light into red light to emit, the second quantum dot conversion block 514 converts the blue light into green light to emit, and the blue light is still transmitted through the interval between the first quantum dot conversion block 512 and the second quantum dot conversion block 514, so that the effect that the display panel can emit the red, green and blue light is achieved.
The appearance of the present embodiment is the same as that of the second embodiment, except that the first transparent substrate 211 and the second transparent substrate 213 in the second embodiment are made by bending one flexible transparent substrate, and the first transparent substrate 511 and the second transparent substrate 513 in the present embodiment are made by stacking two flexible transparent substrates.
Referring to fig. 8, fig. 8 is a method for fabricating a quantum dot color filter of the display panel in fig. 7. In this embodiment, the method for manufacturing a quantum dot color filter includes:
in step 601, two transparent substrates are provided.
In step 602, a plurality of first quantum dot conversion blocks are fabricated on one side surface of one transparent substrate according to a first predetermined pattern, and a plurality of second quantum dot conversion blocks are fabricated on one side surface of another transparent substrate according to a second predetermined pattern. In addition, in this step, a light-shielding matrix may be formed on the transparent substrate. A shading matrix can be manufactured on a transparent substrate, and then a first quantum dot conversion block and a second quantum dot conversion block are manufactured; the first quantum dot conversion block and the second quantum dot conversion block can be manufactured first, and then the shading matrix can be manufactured. The first predetermined pattern and the second predetermined pattern may be the same pattern, or may be symmetrical patterns or other similar or dissimilar patterns, and it is only necessary to ensure that no overlap occurs when the two transparent substrates are stacked.
In step 603, an adhesive material is applied to predetermined locations of one or both of the transparent substrates. The junction material is typically coated at the edges of the transparent substrate.
In step 604, two transparent substrates are stacked to form two transparent substrates, so that at least part of the projection of the first quantum dot conversion block on the first transparent substrate or the second transparent substrate is located between the projections of the adjacent second quantum dot conversion blocks on the first transparent substrate or the second transparent substrate. At this time, the two layers of transparent substrates are bonded and fixed by the bonding material, so that the quantum dot color filter is formed. When the first quantum dot conversion block and the second quantum dot conversion block are overlapped, the first quantum dot conversion block faces the second transparent substrate, and the second quantum dot conversion block faces the first transparent substrate, so that the first quantum dot conversion block and the second quantum dot conversion block are arranged between the first transparent substrate and the second transparent substrate.
Through the mode, the first quantum dot conversion block and the second quantum dot conversion block are respectively processed on the two transparent substrates, the difficulty of patterning processes of the two quantum dot conversion blocks can be reduced, the influence of the processes on the luminescence performance of the quantum dot conversion blocks is further reduced, and extra packaging is not needed. Moreover, the quantum dot conversion block does not need to be processed for multiple times, two transparent substrates can be processed simultaneously and finally overlapped, and the process difficulty and the process cost are reduced.
With further reference to the fourth embodiment, the sixth embodiment can be obtained by combining the fourth embodiment with the fifth embodiment. In this embodiment, the display panel includes an excitation light source and a quantum dot color filter. The quantum dot color filter comprises a first transparent substrate, a second transparent substrate, a plurality of first quantum dot conversion blocks and a plurality of second quantum dot conversion blocks. Different from the fifth embodiment, the first quantum dot conversion block is disposed between the first transparent substrate and the second transparent substrate, and the second quantum dot conversion block is disposed on a side of the second transparent substrate away from the first transparent substrate. That is, the first quantum dot conversion block and the second quantum dot conversion block are in different layers and are separated by the second transparent substrate. In addition, a transparent packaging film is arranged on one side, away from the second transparent substrate, of the second quantum dot conversion block, and the transparent packaging film is connected with the second transparent substrate in an adhesion mode. Preferably, the first transparent substrate is sealed with the second transparent substrate by an adhesive material, and the second transparent substrate is sealed with the transparent encapsulation film. The schematic cross-sectional structure of this embodiment is the same as that of the fourth embodiment, and can be understood with reference to fig. 6. The bonding material may be disposed on the edge of the surface of the first transparent substrate on which the first quantum dot conversion block is disposed, the edge of the surface of the second transparent substrate on which the second quantum dot conversion block is disposed, or on the edge of the surface of the second transparent substrate on which the second quantum dot conversion block is disposed and the edge of the surface of the opposite side thereof.
The manufacturing method of the quantum dot color filter in this embodiment is different from the manufacturing method of the quantum dot color filter in the fifth embodiment in that: in step 604, during the stacking, the first quantum dot conversion block faces the second transparent substrate, and the second quantum dot conversion block faces away from the first quantum dot conversion block, that is, the first quantum dot conversion block is disposed between the first transparent substrate and the second transparent substrate, and the second transparent substrate separates the first quantum dot conversion block from the second quantum dot conversion block.
In the above embodiments, the first quantum dot conversion block and the second quantum dot conversion block may be fabricated on the first transparent substrate and the second transparent substrate by an electrodeposition method, a printing method, a photolithography method, an inkjet method, or the like. The light-shielding matrix can also be produced in the manner described above.
In the above embodiments, the materials for manufacturing each transparent substrate include, but are not limited to: polyimide, polyvinyl chloride, polyethylene, polypropylene, polystyrene and modified organic films thereof with better thermal stability and bending capability; materials for making each quantum dot conversion block include, but are not limited to: silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots, indium arsenide quantum dots, other novel quantum dot materials and the like.
As shown in fig. 9, fig. 9 is a schematic structural diagram of an embodiment of a display device of the present application. The display device 60 includes a housing 61 and a display panel 62 as in any of the above embodiments, wherein the display panel 62 is located in the housing 61.
The beneficial effect of this application is: be different from prior art, first quantum dot conversion piece sets up on first transparent substrate in the display panel among the display device of this application, and second quantum dot conversion piece sets up on second transparent substrate, and mutually independent, each other does not interfere with, simplifies process flow, reduces the processing cost.
The display device is wearable equipment, such as an intelligent bracelet and an intelligent watch; and may be a Virtual Reality (VR) device or the like. But also may be a mobile phone, an electronic book, an electronic newspaper, a television, or a transparent billboard, etc., and is not limited thereto.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A display panel is characterized by comprising an excitation light source and a quantum dot color filter;
the quantum dot color filter comprises a first transparent substrate, a second transparent substrate, a plurality of first quantum dot conversion blocks and a plurality of second quantum dot conversion blocks, wherein the plurality of first quantum dot conversion blocks are arranged on the surface of the same side of the first transparent substrate at intervals, and the plurality of second quantum dot conversion blocks are arranged on the surface of the same side of the second transparent substrate at intervals;
the first transparent substrate and the second transparent substrate are arranged in parallel and are fixed in an adhering mode through an adhesive material, and at least part of the first quantum dot conversion blocks are located between the projections of the adjacent second quantum dot conversion blocks on the first transparent substrate or the second transparent substrate;
the excitation light source is used for irradiating the first quantum dot conversion block and the second quantum dot conversion block to generate light rays with different colors.
2. The display panel according to claim 1, wherein the first transparent substrate and the second transparent substrate belong to two parts of a flexible transparent substrate, and the first transparent substrate and the second transparent substrate that are bonded and fixed are formed by folding and bonding the flexible transparent substrate.
3. The display panel according to claim 2, wherein the first quantum dot conversion block and the second quantum dot conversion block are disposed between the first transparent substrate and the second transparent substrate and are alternately disposed in a same layer side by side.
4. The display panel according to claim 3, wherein the adhesive material is provided at an edge of the flexible transparent substrate, and the flexible transparent substrate is folded in half with a side surface provided with the first quantum dot conversion block, the second quantum dot conversion block, and the adhesive material as an inner surface, so that an inner space formed by folding the flexible transparent substrate in half is sealed by the adhesive material.
5. The display panel according to claim 2, wherein the first quantum dot conversion block is disposed between the first transparent substrate and the second transparent substrate, the second quantum dot conversion block is disposed on a side of the second transparent substrate away from the first transparent substrate, a transparent encapsulation film is disposed on a side of the second quantum dot conversion block away from the second transparent substrate, and the transparent encapsulation film covers the second quantum dot conversion block and is in adhesive connection with the second transparent substrate.
6. The display panel according to any one of claims 2 to 5, wherein the adhesive material is provided around an edge of the inner surface of the flexible transparent substrate folded in half so that an inner space formed after the flexible transparent substrate is folded in half is sealed by the adhesive material.
7. The display panel according to claim 1, wherein the first quantum dot conversion block and the second quantum dot conversion block are disposed between the first transparent substrate and the second transparent substrate, the first transparent substrate and the second transparent substrate are independent flexible transparent substrates, and the adhesive material is disposed around edges of opposite inner surfaces of the first transparent substrate and the second transparent substrate, so that an inner space formed by the first transparent substrate and the second transparent substrate is sealed by the adhesive material.
8. The display panel of claim 1, wherein the first quantum dot conversion block is disposed between the first transparent substrate and the second transparent substrate, the second quantum dot conversion block is arranged on one side of the second transparent substrate far away from the first transparent substrate, the first transparent substrate and the second transparent substrate are mutually independent flexible transparent substrates, the bonding material is arranged around the edges of the opposite inner surfaces of the first transparent substrate and the second transparent substrate, so that the inner space formed by the first transparent substrate and the second transparent substrate is sealed by the bonding material, a transparent packaging film is arranged on one side of the second quantum dot conversion block far away from the second transparent substrate, the transparent packaging film covers the second quantum dot conversion block and is connected with the second transparent substrate in an adhesive mode.
9. A display device, comprising a housing and a display panel according to any one of claims 1 to 8, the display panel being located within the housing.
10. A method for manufacturing a quantum dot color filter is characterized by comprising the following steps:
providing a transparent substrate;
manufacturing a plurality of first quantum dot conversion blocks on the upper surface of one side of the transparent substrate, and manufacturing a plurality of second quantum dot conversion blocks on the upper surface or the lower surface of the other side of the transparent substrate;
and bending the transparent substrate to form two layers of transparent substrates, so that the projection of the first quantum dot conversion block on the first transparent substrate or the second transparent substrate is positioned between the projections of the adjacent second quantum dot conversion blocks on the first transparent substrate or the second transparent substrate in at least part of the first quantum dot conversion blocks.
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| CN103091895B (en) * | 2013-01-22 | 2015-12-09 | 北京京东方光电科技有限公司 | A kind of display device and preparation method |
| CN203465442U (en) * | 2013-07-23 | 2014-03-05 | 京东方科技集团股份有限公司 | Color filter, liquid crystal panel and display device |
| CN103605234A (en) * | 2013-11-29 | 2014-02-26 | Tcl集团股份有限公司 | Quantum dot color filter and liquid crystal display device |
| CN105526558B (en) * | 2014-09-30 | 2018-09-04 | 鸿富锦精密工业（深圳）有限公司 | Color conversion film converts the display device of film using color and manufactures the method that the color converts film |
| CN204389849U (en) * | 2014-12-30 | 2015-06-10 | 乐视致新电子科技（天津）有限公司 | A kind of quantum dot liquid crystal module and display device |
| CN105467669A (en) * | 2016-02-03 | 2016-04-06 | 京东方科技集团股份有限公司 | Display substrate, preparing method thereof, display panel and display device |
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