CN216054772U

CN216054772U - Display device

Info

Publication number: CN216054772U
Application number: CN202122760447.7U
Authority: CN
Inventors: 杨兰兰; 樊聪聪; 穆琳佳; 金南德
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-03-15
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to the field of display and discloses a display device, which comprises a first substrate; a second substrate; the color filter layer is positioned on one side of the first substrate, which is close to the second substrate, and comprises a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area which are adjacently arranged; the pixel separation layer is provided with a first opening corresponding to the red sub-pixel area, a second opening corresponding to the green sub-pixel area and a third opening corresponding to the blue sub-pixel area; the quantum dot film layer comprises a red quantum dot layer and a green quantum dot layer, the red quantum dot layer is filled in the first opening, and the green quantum dot layer is filled in the second opening; the blue light-blocking film layer is positioned at the third opening; and the blue light-emitting device is positioned on one side of the second substrate close to the first substrate, and is arranged corresponding to the red sub-pixel area, the green sub-pixel area and the blue sub-pixel area. The blue light-blocking film layer blocks part of blue light from emitting, so that the aim of adjusting white balance is fulfilled.

Description

Display device

Technical Field

The utility model relates to the technical field of display, in particular to a display device.

Background

With the development of Quantum Dot (QD) display technology, a quantum dot color conversion layer is commonly used in OLED (Organic Light-Emitting Diode) and Mini/micro led full color display applications. This structure combines the advantages of electroluminescent and inorganic emitters to achieve higher brightness, color saturation, and wider color gamut. At present, most of ways for realizing full-color display of the quantum dot color conversion layer and the blue LED are respectively manufactured and then are bonded into a display panel. However, the existing display has the problem that the white balance is blue.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a display device, which is used for relieving the problem that the white balance of the display device is bluish.

In order to achieve the purpose, the utility model provides the following technical scheme:

a display device, comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

the color filter layer is positioned on one side, close to the second substrate, of the first substrate and comprises a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area which are arranged adjacently;

the pixel separation layer is positioned on one side, close to the second substrate, of the first substrate, and is provided with a first opening corresponding to the red sub-pixel area, a second opening corresponding to the green sub-pixel area and a third opening corresponding to the blue sub-pixel area;

the quantum dot film layer is positioned on one side, close to the second substrate, of the color filter layer and comprises a red quantum dot layer and a green quantum dot layer, the red quantum dot layer is filled in the first opening, and the green quantum dot layer is filled in the second opening;

the blue light-blocking film layer is positioned at the third opening and used for reducing the light output quantity of the blue sub-pixel area;

and the blue light-emitting device is positioned on one side of the second substrate close to the first substrate, and is arranged corresponding to the red sub-pixel area, the green sub-pixel area and the blue sub-pixel area.

In the display device, the color filter layer on the first substrate has a red sub-pixel region, a green sub-pixel region and a blue sub-pixel region, the pixel separation layer is provided with a first opening, a second opening and a third opening corresponding to the red sub-pixel region, the green sub-pixel region and the blue sub-pixel region, the first opening is filled with red quantum dots, the second opening is filled with green quantum dots, the third opening is provided with a blue light-blocking film layer, blue light emitting devices corresponding to the red, green and blue sub-pixel regions are mounted on the second substrate, light emitted from the blue light emitting devices is directed to the corresponding sub-pixel regions, because the blue light-blocking film layer is arranged in the opening corresponding to the blue sub-pixel area to block part of blue light from emitting, therefore, the light emitting proportion of the red sub-pixel area, the green sub-pixel area and the blue sub-pixel area is proper, and the aim of adjusting white balance is fulfilled.

Optionally, the blue light-blocking film layer includes:

the first filter layer is formed on one side, close to the second substrate, of the first substrate;

and the diffusion layer is formed on one side of the first filter layer close to the second substrate.

Optionally, the color filter layer includes a second filter layer located in the red sub-pixel region and a third filter layer located in the green sub-pixel region;

the thickness of the first filter layer is smaller than that of the second filter layer, and the thickness of the first filter layer is smaller than that of the third filter layer.

Optionally, the blue light-blocking film layer includes:

the semitransparent shading layer is formed on one side, close to the second substrate, of the first substrate;

and the diffusion layer is formed on one side of the semitransparent shading layer close to the second substrate.

the thickness of the semi-transparent shading layer is larger than that of the second filtering layer, and the thickness of the semi-transparent shading layer is larger than that of the third filtering layer.

Optionally, the color filter layer is located between the pixel separation layer and the first substrate.

Optionally, an orthographic projection of the opening of the first opening on the surface of the pixel separation layer close to the first substrate on the first substrate is a first projection, an orthographic projection of the opening of the first opening on the surface of the pixel separation layer far from the first substrate on the first substrate is a second projection, and the first projection covers the second projection.

Optionally, an orthographic projection of the opening of the second opening on the surface of the pixel separation layer close to the first substrate on the first substrate is a third projection, an orthographic projection of the opening of the second opening on the surface of the pixel separation layer far from the first substrate on the first substrate is a fourth projection, and the fourth projection is covered by the third projection.

Optionally, an orthographic projection of an opening of the third opening on a surface of one side, close to the first substrate, of the pixel separation layer on the first substrate is a fifth projection, an orthographic projection of an opening of the third opening on a surface of one side, far away from the first substrate, of the pixel separation layer on the first substrate is a sixth projection, and the sixth projection is covered by the fifth projection.

Optionally, when the blue light-blocking film layer includes a semi-transparent light-shielding layer, an orthographic projection of the semi-transparent light-shielding layer on the first substrate close to the first substrate side surface covers an orthographic projection of the semi-transparent light-shielding layer on the first substrate far from the first substrate side surface.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another display device according to an embodiment of the utility model;

fig. 6 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another display device according to an embodiment of the utility model;

fig. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention;

FIGS. 9 a-9 e are schematic diagrams of a film layer fabrication process for the structure of FIG. 1;

fig. 10 a-10 c are schematic flow diagrams illustrating fabrication of the structure of fig. 5.

Icon: 1-a first substrate; 2-a color filter layer; 3-a pixel separation layer; 4-a quantum dot film layer; 5-a blue light-blocking film layer; 6-blue light emitting device; 7-a second substrate; 21-a second filter layer; 22-a third filter layer; 41-red quantum dot layer; 42-green quantum dot layer; 51-a first filter layer; 52-a diffusion layer; 51' -a translucent light-shielding layer; r-red sub-pixel region; a G-green sub-pixel region; b-blue sub-pixel area.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of 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 invention.

As shown in fig. 1 to 8, an embodiment of the present invention provides a display device, including:

a first substrate 1;

a second substrate 7 disposed opposite to the first substrate 1;

the color filter layer 2 is positioned on one side, close to the second substrate 7, of the first substrate 1, and the color filter layer 2 comprises a red sub-pixel area R, a green sub-pixel area G and a blue sub-pixel area B which are arranged adjacently;

the pixel separation layer 3 is positioned on one side of the first substrate 1 close to the second substrate 7, and a first opening corresponding to the red sub-pixel region R, a second opening corresponding to the green sub-pixel region G and a third opening corresponding to the blue sub-pixel region B are arranged on the pixel separation layer 3;

the quantum dot film layer 4 is located on one side of the color filter layer 2 close to the second substrate 7, the quantum dot film layer 4 comprises a red quantum dot layer 41 and a green quantum dot layer 42, the red quantum dot layer 41 is filled in the first opening, and the green quantum dot layer 42 is filled in the second opening;

the blue light-blocking film layer 5 is positioned at the third opening and is used for reducing the light output quantity of the blue sub-pixel area B;

and a blue light emitting device 6 on a side of the second substrate 7 adjacent to the first substrate 1, wherein the blue light emitting device 6 is disposed corresponding to the red, green and blue sub-pixel regions R, G and B.

In the display device, the color filter layer 2 on the first substrate 1 has a red sub-pixel region R, a green sub-pixel region G and a blue sub-pixel region B, the pixel separation layer 3 is provided with a first opening, a second opening and a third opening corresponding to the red sub-pixel region R, the green sub-pixel region G and the blue sub-pixel region B, respectively, the first opening is filled with red quantum dots to form a red quantum dot layer 41, the second opening is filled with green quantum dots to form a green quantum dot layer 43, the third opening is provided with a blue light-blocking film layer 5, the blue light-emitting devices 6 corresponding to the red sub-pixel region R, the green sub-pixel region G and the blue sub-pixel region B are mounted on the second substrate 7, the light emitted from the blue light-emitting devices 6 is directed to the corresponding sub-pixel regions, namely the red sub-pixel region R, the green sub-pixel region G and the blue sub-pixel region B, and the blue light-blocking film layer 5 is provided in the opening corresponding to the blue sub-pixel region B, and part of blue light is blocked from being emitted, so that the light emitting proportion of the red sub-pixel area R, the green sub-pixel area G and the blue sub-pixel area B is proper, and the aim of adjusting white balance is fulfilled.

Optionally, the blue light-blocking film layer 5 includes:

a first filter layer 51 formed on the first substrate 1 on a side close to the second substrate 7, for reflecting or absorbing a part of blue light;

and a diffusion layer 52 formed on the first filter layer 51 on the side close to the second substrate 7 for scattering blue light.

In a possible implementation manner, referring to fig. 1 to 4, the blue light-blocking film layer 5 includes a first filter layer 51 and a diffusion layer 52, blue light emitted by the blue light-emitting device 6 is emitted to the blue sub-pixel region B, and the blue light is first scattered by the diffusion layer 52 and then partially filtered by the first filter layer 51, so that the amount of blue light emitted by the blue sub-pixel region B is reduced, and the blue light is matched with red light emitted by the red sub-pixel region R and green light emitted by the green sub-pixel region G, so as to prevent white balance of the entire display device from being shifted to blue.

Alternatively, the color filter layer 2 includes a second filter layer 21 located in the red sub-pixel region R, and a third filter layer 22 located in the green sub-pixel region G; in one possible embodiment, the second filter layer 21 blocks only the blue light beam from passing through, or the second filter layer 21 allows only the red light beam to pass through; the third filter layer 22 blocks only the blue light beam from passing through, or the third filter layer 22 allows only the green light beam to pass through.

The thickness of the first filter layer 51 is smaller than the thickness of the second filter layer 21, and the thickness of the first filter layer 51 is smaller than the thickness of the third filter layer 22.

In one possible implementation manner, with continued reference to fig. 1 to 4, the blue light-blocking film layer 5 may be formed in a manner that: when the color filter layer 2 corresponding to the blue sub-pixel region B is etched, the color filter layer 2 with a certain thickness is not completely etched, that is, the color filter layer 2 with a certain thickness is reserved to be used as the first filter layer 51, and then the diffusion layer 52 is filled in the third opening corresponding to the blue sub-pixel region B.

It should be noted that the thickness of the first filter layer 51 corresponding to the blue sub-pixel region B can be set according to the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G, for example: the red and green sub-pixel regions R and the green sub-pixel regions G have stronger light-emitting brightness, the thickness of the first filter layer 51 corresponding to the blue sub-pixel region B can be reduced, namely, the etching amount is increased, and the light-emitting brightness of the blue sub-pixel region B can be ensured to be matched with the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G by blocking the emergence of a small amount of blue light, so that the white balance is realized; the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G is weak, the thickness of the first filter layer 51 corresponding to the blue sub-pixel region B can be increased, that is, the etching amount is reduced, and the light-emitting brightness of the blue sub-pixel region B can be matched with the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G by blocking the emergence of blue light to a certain extent, so that white balance is realized. Illustratively, the thickness of the first filter layer 51 corresponding to the blue sub-pixel region B is in the range of 0.5-2 μm.

In one possible implementation, the diffusion layer 52 is doped with scattering particles, such as SiO₂And TiO₂The scattering particles can destroy the lambertian distribution of the intensity of the blue light, so that the blue light can be more uniformly irradiated to the first filter layer 51.

Optionally, the blue light-blocking film layer 5 includes:

a translucent light-shielding layer 51' formed on the first substrate 1 on the side close to the second substrate 7 for reflecting or absorbing a part of the blue light;

and a diffusion layer 52 formed on the translucent light-shielding layer 51' on the side close to the second substrate 7 for scattering blue light.

In a possible implementation manner, referring to fig. 5 to 8, the blue light-blocking film layer 5 includes a semi-transparent light-shielding layer 51 'and a diffusion layer 52, blue light emitted by the blue light-emitting device 6 is emitted to the blue sub-pixel region B, and the blue light is first scattered by the diffusion layer 52 and then passes through the semi-transparent light-shielding layer 51' to filter part of the blue light, so that the amount of the blue light emitted by the blue sub-pixel region B is reduced, and the blue light is matched with red light emitted by the red sub-pixel region R and green light emitted by the green sub-pixel region G, so as to prevent white balance of the whole display device from being shifted to blue.

Alternatively, the color filter layer 2 includes a second filter layer 21 located in the red sub-pixel region R, and a third filter layer 22 located in the green sub-pixel region G;

the translucent light-shielding layer 51 'has a thickness greater than that of the second filter layer 21, and the translucent light-shielding layer 51' has a thickness greater than that of the third filter layer 22.

In one possible implementation manner, with continued reference to fig. 5 to 8, the blue light-blocking film layer 5 may be formed in a manner that: when the first filter layer 51 corresponding to the blue sub-pixel region B is etched, the first filter layer is completely etched, and then before the blue sub-pixel region B is manufactured, a semi-transparent light shielding layer 51 'with a certain thickness is manufactured, the semi-transparent light shielding layer 51' can block part of blue light from emitting, and then the opening corresponding to the blue sub-pixel region is filled with the diffusion layer 52.

In one possible implementation, the translucent shading layer 51 'may be made of a shading material and a suitable solvent, for example, the shading material may be black glue, and the translucent shading layer 51' may be made by photolithography or inkjet printing.

It should be noted that the thickness of the translucent light-shielding layer 51' and the concentration of the light-shielding material corresponding to the blue sub-pixel region B can be set according to the luminance of the light emitted from the red sub-pixel region R and the green sub-pixel region G, for example: when the concentration of the shading material is fixed, the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G is strong, the thickness of the semitransparent shading layer 51' corresponding to the blue sub-pixel region B can be reduced, and the light-emitting brightness of the blue sub-pixel region B can be matched with the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G by blocking a small amount of blue light, so that white balance is realized; the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G is weak, the thickness of the semitransparent light shielding layer 51' corresponding to the blue sub-pixel region B can be increased, and the light-emitting brightness of the blue sub-pixel region B can be matched with the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G by blocking the emergence of blue light to a certain extent, so that white balance is realized. Illustratively, the mass fraction of the light-shielding material is 1% -20%.

Another example is: when the thickness of the semitransparent light shielding layer 51 'is fixed, the light-emitting brightness of the red sub-pixel area R and the green sub-pixel area G is strong, the concentration of shielding materials in the semitransparent light shielding layer 51' can be reduced, and the light-emitting brightness of the blue sub-pixel area B can be matched with the light-emitting brightness of the red sub-pixel area R and the green sub-pixel area G by blocking a small amount of blue light, so that white balance is realized; the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G is weak, the concentration of the shielding material in the translucent light shielding layer 51' can be increased, and the light-emitting brightness of the blue sub-pixel region B can be matched with the light-emitting brightness of the red sub-pixel region R and the green sub-pixel region G by blocking the emergence of blue light to a certain extent, so that white balance is realized.

In one possible implementation, referring to fig. 1, 3, 5 and 7, the color filter layer 2 is an integral layer structure, and the color filter layer 2 is located between the pixel separation layer 3 and the first substrate 1, for example, the color filter layer 2 is coated or evaporated on the first substrate 1 in an integral layer.

In one possible implementation, referring to fig. 2, 4, 6, and 8, the color filter layer 2 is disposed only in the region corresponding to each sub-pixel region, i.e., the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B, for example, when the color filter layer 2 is formed by coating or evaporation, the color filter layer 2 is formed only in the corresponding sub-pixel region, and the opening region is formed by leaving a part of the region without coating or evaporation.

Optionally, an orthographic projection of the opening of the first opening on the surface of the pixel separation layer 3 close to the first substrate 1 on the first substrate 1 is a first projection, an orthographic projection of the opening of the first opening on the surface of the pixel separation layer 3 far from the first substrate 1 on the first substrate 1 is a second projection, and the first projection covers the second projection.

It should be noted that the first projection covers the second projection, and the covering may be understood as that the first projection and the second projection are coincident, that is, the first projection and the second projection have the same area, or the area of the first projection is larger than the area of the second projection.

Optionally, an orthographic projection of the opening of the second opening on the surface of the pixel separation layer 3 close to the first substrate 1 on the first substrate 1 is a third projection, an orthographic projection of the opening of the second opening on the surface of the pixel separation layer 3 far from the first substrate 1 on the first substrate 1 is a fourth projection, and the fourth projection is covered by the third projection.

It should be noted that the third projection covers the fourth projection, and the covering can be understood as that the third projection and the fourth projection are coincident, that is, the third projection and the fourth projection are equal in area, or the area of the third projection is larger than the area of the fourth projection.

Optionally, an orthographic projection of the opening of the third opening on the surface of the pixel separation layer 3 close to the first substrate 1 on the first substrate 1 is a fifth projection, an orthographic projection of the opening of the third opening on the surface of the pixel separation layer 3 far from the first substrate 1 on the first substrate 1 is a sixth projection, and the fifth projection covers the sixth projection.

It should be noted that the fifth projection covers the sixth projection, and the covering can be understood as that the fifth projection is coincident with the sixth projection, that is, the area of the fifth projection is equal to that of the sixth projection, or the area of the fifth projection is larger than that of the sixth projection.

In a possible implementation manner, referring to fig. 1, fig. 2, fig. 5 and fig. 6, the size of the opening of the first opening on the surface of the side, close to the first substrate 1, of the pixel separation layer 3 is equal to the size of the opening of the first opening on the surface of the side, far away from the first substrate 1, of the pixel separation layer 3; the size of the opening of the second opening on the surface of one side, close to the first substrate 1, of the pixel separation layer 3 is equal to the size of the opening of the second opening on the surface of one side, far away from the first substrate 1, of the pixel separation layer; the size of the opening of the third opening on the surface of one side, close to the first substrate 1, of the pixel separation layer 3 is equal to the size of the opening of the third opening on the surface of one side, far away from the first substrate 1, of the pixel separation layer 3, so that etching is facilitated.

In a possible implementation manner, referring to fig. 3, fig. 4, fig. 7 and fig. 8, the opening size of the first opening on the surface of the side of the pixel separation layer 3 close to the first substrate 1 is larger than the opening size of the first opening on the surface of the side of the pixel separation layer 3 away from the first substrate 1, that is, the light-out side opening of the red sub-pixel region R is larger than the light-in side opening; the opening size of the second opening on the surface of one side, close to the first substrate 1, of the pixel separation layer 3 is larger than the opening size of the second opening on the surface of one side, far away from the first substrate 1, of the pixel separation layer 3, namely the light-emitting side opening of the green sub-pixel area is larger than the light-in side opening; the opening size of the third opening on the surface of the side, close to the first substrate 1, of the pixel separation layer 3 is larger than the opening size of the third opening on the surface of the side, far away from the first substrate 1, of the pixel separation layer 3, that is, the light-emitting side opening of the blue sub-pixel area is larger than the light-in side opening.

It should be noted that, the blue light entering the red quantum dot layer 41 in the first opening is converted into red light by the red quantum dots in the red quantum dot layer 41, and since the light exit side opening of the first opening is larger than the light entrance side opening, the red light is reflected to the light exit side after reaching the pixel separation layer 3, so that the light exit amount of the red light is increased, a large amount of red light exits from the light exit side, and the effect of increasing the light exit of the red light is achieved;

meanwhile, the blue light emitted into the green quantum dot layer 42 in the second opening is converted into green light by the green quantum dots in the green quantum dot layer 42, and since the light-emitting side opening of the second opening is larger than the light-entering side opening, the green light is reflected to the light-emitting side after being emitted to the pixel separation layer 3, so that the light-emitting amount of the green light is increased, a large amount of green light is emitted from the light-emitting side, and the effect of increasing the light-emitting amount of the green light is realized;

meanwhile, the blue light entering the diffusion layer 52 in the third opening is scattered by the scattering particles in the diffusion layer 52, and since the light-out side opening of the third opening is larger than the light-in side opening, the blue light is reflected to the light-out side after being emitted to the pixel separation layer 3, and the utilization rate of the blue light is improved.

It should be noted that the orthographic projection of the diffusion layer 52 on the first substrate 1 is located in the blue sub-pixel region B, and the area of the orthographic projection of the exemplary diffusion layer 52 on the first substrate 1 is equal to the area of the blue sub-pixel region B; alternatively, the area of the orthographic projection of the diffusion layer 52 on the first substrate 1 is smaller than the area of the blue sub-pixel region B.

Alternatively, when the blue light-blocking film layer 5 includes the translucent light-shielding layer 51 ', an orthographic projection of the side surface of the translucent light-shielding layer 51 ' close to the first substrate 1 on the first substrate 1 covers an orthographic projection of the side surface of the translucent light-shielding layer 51 ' far from the first substrate 1 on the first substrate 1.

It should be noted that the orthographic projection of the surface of the translucent light shielding layer 51 'on the first substrate 1 near the side of the first substrate 1 covers the orthographic projection of the surface of the translucent light shielding layer 51' on the first substrate 1 far from the side of the first substrate 1, and covering can be understood as that the orthographic projection of the surface of the translucent light shielding layer 51 'on the first substrate 1 near the side of the first substrate 1 is coincident with the orthographic projection of the surface of the translucent light shielding layer 51' on the first substrate 1 far from the side of the first substrate 1, that is, the orthographic projection of the surface of the translucent light shielding layer 51 'on the first substrate 1 on the side close to the first substrate 1 is equal to the orthographic projection area of the surface of the translucent light shielding layer 51' on the first substrate 1 on the side away from the first substrate 1, or the area of the orthographic projection of the surface of the semi-transparent light shielding layer 51 'close to one side of the first substrate 1 on the first substrate 1 is larger than the area of the orthographic projection of the surface of the semi-transparent light shielding layer 51' far from one side of the first substrate 1 on the first substrate 1.

In one possible implementation manner, referring to fig. 7 and 8, an area of an orthographic projection of the surface of the translucent light shielding layer 51 'on the first substrate 1 on the side close to the first substrate 1 is larger than an area of an orthographic projection of the surface of the translucent light shielding layer 51' on the first substrate 1 on the side far from the first substrate 1.

Note that, the orthographic projection of the semitransparent light shielding layer 51 'on the first substrate 1 is located in the blue sub-pixel region B, and the area of the orthographic projection of the semitransparent light shielding layer 51' on the first substrate 1 is exemplarily equal to the area of the blue sub-pixel region B; alternatively, the area of the orthographic projection of the translucent light shielding layer 51' on the first substrate 1 is smaller than the area of the blue sub-pixel region B.

It should be noted that, in the structure shown in fig. 1 and fig. 3, the diffusion layer 52 is shown according to the shape adaptability of the third opening, and in a possible embodiment, the portion of the diffusion layer 52 higher than the pixel separation layer 3 may also be adapted to other shapes, for example, an arc shape, which is not limited in this application. In the structure shown in fig. 7, the portion of the translucent light shielding layer 51' higher than the pixel separation layer 3 may have other shapes, which is not limited in the present application.

The following illustrates the film layer preparation process of the display device by taking the structure in fig. 1 as an example:

referring to fig. 9 a-9 e in combination with fig. 1, a transparent substrate (rigid or flexible) is selected as the first substrate 1, and a color filter layer 2 is formed on the transparent substrate, wherein the thickness of the color filter layer 2 is in the range of 0.5-2.5 μm; then, a pixel separation layer 3 is manufactured on the color filter layer 2, and the pixel separation layer 3 can be made of black, white, yellow or gray materials; partially etching the position, corresponding to the blue sub-pixel area B, of the color filter layer 2; manufacturing a quantum dot film layer 4, wherein red quantum dots are adopted by a red sub-pixel region R as a red quantum dot layer 41, green quantum dots are adopted by a green sub-pixel region G as a green quantum dot layer 42, scattering particles are adopted by a blue sub-pixel region B as a diffusion layer 52, and all three sub-pixel regions can be manufactured in a photoetching or ink-jet printing mode; after the quantum dot film layer 4 is manufactured, the blue light-emitting device 6 is aligned and attached, and the blue light-emitting device 6 is arranged on the second substrate 7; illustratively, the blue light emitting device 6 may be a blue LED.

The following film layer preparation process of the display device is illustrated by taking fig. 5 as an example:

referring to fig. 10 a-10 c in combination with fig. 5 and 9 a-9 c, a transparent substrate (rigid or flexible) is selected as the first substrate 1, and a color filter layer 2 is formed on the transparent substrate, wherein the thickness of the color filter layer 2 is in the range of 0.5-2.5 μm; then, a pixel separation layer 3 is manufactured on the color filter layer 2, and the pixel separation layer 3 can be made of black, white, yellow or gray materials; the method comprises the steps of completely etching the part, corresponding to a blue sub-pixel area B, of a color filter layer 2, then manufacturing a semi-transparent shading layer 51 ' on the blue sub-pixel area B, wherein the semi-transparent shading layer 51 ' can be prepared by adopting black glue and a proper solvent and is realized by means of photoetching or ink-jet printing, the thickness range of the semi-transparent shading layer 51 ' is 0.2-2 mu m, and the thickness and the concentration of the shading layer can be adjusted specifically according to the light output quantity of red and green sub-pixel areas; then, the quantum dot film layer 4 is manufactured, red quantum dots are adopted by the red sub-pixel region R as a red quantum dot layer 41, green quantum dots are adopted by the green sub-pixel region G as a green quantum dot layer 42, scattering particles are adopted by the blue sub-pixel region B as a diffusion layer 52, and all three sub-pixel regions can be manufactured in a photoetching or ink-jet printing mode; after the quantum dot film layer 4 is manufactured, the blue light-emitting device 6 is aligned and attached, and the blue light-emitting device 6 is arranged on the second substrate 7; illustratively, the blue light emitting device 6 may be a blue LED.

The display device provided by the embodiment of the utility model adopts the scheme that the part of the color filter layer corresponding to the blue sub-pixel area is incompletely etched or the part of the color filter layer corresponding to the blue sub-pixel area is completely etched, the design of the semitransparent light shielding layer is added, the light output quantity of the blue sub-pixel area is effectively adjusted and is matched with the light output quantity of the red sub-pixel area and the green sub-pixel area, the white balance adjustment of the display device is realized, the process is simple, and the realization is easy.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A display device, comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

2. The display device according to claim 1, wherein the blue light-blocking film layer comprises:

3. The display device according to claim 2, wherein the color filter layer comprises a second filter layer in the red sub-pixel region and a third filter layer in the green sub-pixel region;

4. The display device according to claim 1, wherein the blue light-blocking film layer comprises:

5. The display device according to claim 4, wherein the color filter layer comprises a second filter layer in the red sub-pixel region and a third filter layer in the green sub-pixel region;

6. A display device as claimed in any one of claims 1 to 5, characterized in that the color filter layer is located between the pixel separation layer and the first substrate.

7. The display device according to any one of claims 1 to 5, wherein an orthogonal projection of the opening of the first opening on a surface of the pixel separation layer on a side close to the first substrate on the first substrate is a first projection, and an orthogonal projection of the opening of the first opening on a surface of the pixel separation layer on a side away from the first substrate on the first substrate is a second projection, and the first projection covers the second projection.

8. The display device according to any one of claims 1 to 5, wherein an orthogonal projection of the opening of the second opening on a surface of the pixel separation layer on a side close to the first substrate on the first substrate is a third projection, and an orthogonal projection of the opening of the second opening on a surface of the pixel separation layer on a side far from the first substrate on the first substrate is a fourth projection, and the third projection covers the fourth projection.

9. The display device according to any one of claims 1 to 5, wherein an orthogonal projection of an opening of the third opening on a surface of the pixel separation layer on a side close to the first substrate on the first substrate is a fifth projection, and an orthogonal projection of an opening of the third opening on a surface of the pixel separation layer on a side far from the first substrate on the first substrate is a sixth projection, and the fifth projection covers the sixth projection.

10. The display device according to claim 9, wherein when the blue light-blocking film layer includes a translucent light-blocking layer, an orthographic projection of the translucent light-blocking layer on the first substrate on a side surface thereof close to the first substrate covers an orthographic projection of the translucent light-blocking layer on the first substrate on a side surface thereof remote from the first substrate.