WO2024016441A1 - Display apparatus and manufacturing method therefor - Google Patents

Abstract

A display apparatus and a manufacturing method therefor. The display apparatus comprises a plurality of mutually independent sub-pixel areas, a light source array (10), and a color transformation structure (20) located on a light-emergent side of the light source array (10), wherein the color transformation structure (20) comprises specular reflection layers (201), and a plurality of mutually independent color transformation layers (202) which are alternately arranged with the specular reflection layers (201), the color transformation layers (202) corresponding to the sub-pixel areas on a one-to-one basis; light emitted by the light source array (10) irradiates the sub-pixel areas; each color transformation layer (202) is configured to perform color gamut transformation on the light emitted by the light source array (10), so as to obtain light of the color corresponding to the sub-pixel area where the color transformation layer (202) is located; and the specular reflection layers (201) are configured to reflect natural light, such that specular display is performed. In the display apparatus, a reflection area and a display area are enabled to be independent of each other, such that it is not necessary for the reflection area to have both reflection and light transmission functions, thereby improving the reflection and display effects.

Description

Display device and method of manufacturing display device

Related cross-references

This disclosure claims priority to the Chinese patent application filed with the China Patent Office on July 19, 2022, with application number 2022108518988 and the public name of "Display Device and Manufacturing Method of Display Device", the entire content of which is incorporated into this disclosure by reference. middle.

Technical field

The present disclosure relates to a display device and a manufacturing method of the display device.

Background technique

With the rapid development of display technology, display products, which can display rich and colorful color information, have been increasingly used in various fields to meet more users' needs for display devices. Among them, in the field of health, in order to expand the application scope of the display device, the display can be added with a mirror reflection effect, so that the user can not only observe his own mirror reflection image at any time during exercise to adjust the exercise posture, but also can adjust the exercise posture during exercise. Watch video information, live TV, etc.

Currently, mirror displays in related technologies are obtained by combining static display glass with high reflectivity and a certain light transmittance and a liquid crystal display device. During use, when the LCD device is turned off, the mirror glass displays the function of mirror reflection. When the LCD device is turned on, part of the light is transmitted through the LCD device, thereby realizing the function of displaying the image.

However, the LCD device in this solution has low luminous brightness, and the mirror display glass will cause brightness loss, so that in a high-brightness environment, the insufficient brightness of the LCD device will lead to poor display effects, and when the LCD device is turned on When the display area has both display and reflection phenomena, the superimposed use of reflection and display functions will lead to poor effects of both.

Contents of the invention

(1) Technical problems to be solved

In the existing technology, when using a liquid crystal display device and mirror display glass, since the liquid crystal display device itself has low luminous brightness, and the mirror display glass will cause brightness loss, when the liquid crystal display device is turned on, display and reflection phenomena will exist in the display area at the same time. , which causes the problem of poor contrast caused by the mixing of reflected light and display light.

(2) Technical solutions

According to various embodiments of the present disclosure, a display device and a manufacturing method of the display device are provided.

A display device, including: a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure located on the light exit side of the light source array. The color conversion structure includes a specular reflection layer and a specular reflection layer alternately arranged with the specular reflection layer. A plurality of mutually independent color conversion layers, each of the color conversion layers corresponding to each of the sub-pixel areas;

The light emitted by the light source array illuminates each of the sub-pixel areas; each of the color conversion layers is configured to convert the light emitted by the light source array through the color gamut to obtain light of a corresponding color in the sub-pixel area where it is located, To perform picture display; the specular reflection layer is configured to reflect natural light to perform specular display.

As an optional implementation of the embodiment of the present application, the color conversion structure further includes a plurality of mutually independent color filter layers, each of the color conversion layers and the corresponding color filter layer are connected to each other, and the The color filter layer is located on a side of the color conversion layer facing away from the light source array. The color filter layer is configured to convert residual light that has not been subjected to color gamut conversion into a corresponding color in the sub-pixel area where it is located. Perform filtering for screen display.

As an optional implementation manner of the embodiment of the present application, the color conversion structure further includes a black matrix layer and a light-shielding layer. The light-shielding layer is located on a side of the layer where the specular reflection layer is located close to the light source array. The black matrix layer is connected to the specular reflection layer and the light shielding layer respectively and is arranged between the specular reflection layer and the light shielding layer; the black matrix layer is alternately arranged with each of the color filter layers. The light shielding layer and each of the color conversion layers are alternately arranged;

The black matrix layer is configured to block light and prevent cross-talk between the light irradiated to the color filter layers; the light-shielding layer is configured to block light and prevent cross-talk between the light irradiated to the color conversion layers.

As an optional implementation manner of the embodiment of the present application, the height of the color filter layer is greater than the height of the black matrix layer, and the height of the color conversion layer is greater than the height of the light shielding layer.

As an optional implementation of the embodiment of the present application, the height of the color filter layer is 0-10 μm greater than the height of the black matrix layer, and the height of the color conversion layer is 0-10 μm greater than the height of the light shielding layer. -10μm.

As an optional implementation of the embodiment of the present application, the thickness of the light-shielding layer is 1 nm-10 μm.

As an optional implementation manner of the embodiment of the present application, the materials of the color conversion layer corresponding to each different sub-pixel area are different.

As an optional implementation of the embodiment of the present application, the material of the color conversion layer is a quantum dot material or an organic fluorescent material.

As an optional implementation of the embodiment of the present application, the thickness of the specular reflection layer is 1 nm-10 μm.

As an optional implementation manner of the embodiment of the present application, the color conversion structure further includes a first driving backplane, the first driving backplane is located on the layer where the specular reflection layer and the color conversion layer are located away from the One side of the light source array.

As an optional implementation manner of the embodiment of the present application, the light source array includes a second driving backplane and a light source chip connected to the second driving backplane. The light source chip is used to emit light and illuminate the Color conversion structure.

As an optional implementation of the embodiment of the present application, the light source array further includes a filling layer, the filling layer is filled around the periphery of the light source chip, and the light source chips are arranged at fixed intervals.

As an optional implementation manner of the embodiment of the present application, the display device further includes an encapsulation layer, and the light source array and the color conversion structure are connected to each other through the encapsulation layer.

A method of manufacturing a display device, the method comprising:

A first driving backplane is provided, and a color conversion structure is formed on the first driving backplane; the color conversion structure includes a specular reflection layer and a plurality of mutually independent color conversion layers alternately arranged with the specular reflection layer, each The color conversion layer corresponds to each sub-pixel area in a one-to-one manner, and the specular reflection layer is configured to reflect natural light for specular display; each of the color conversion layers is configured to pass the light emitted by the light source array through the color Domain conversion to obtain the light of the corresponding color in the sub-pixel area for picture display;

Provide a second driving backplane, forming a light source array on the second driving backplane;

The light-emitting side of the light source array is combined with the color conversion structure to form a display device. The display device includes a plurality of mutually independent sub-pixel areas.

As an optional implementation method of the embodiment of the present application, forming a color conversion structure on the first driving backplane includes:

Deposit a specular reflective layer on the first driving backplane according to preset sub-pixel intervals;

Using yellow light technology to form a black matrix layer on the specular reflective layer;

Using yellow light technology to form multiple color filter layers at intervals between the specular reflection layers, the height of the color filter layer is greater than the height of the black matrix layer;

Use yellow light technology to form a light-shielding layer on the black matrix layer;

A corresponding color conversion layer is deposited on each of the color filter layers to obtain a color conversion structure, and the height of the color conversion layer is greater than the height of the light shielding layer.

As an optional implementation method of the embodiment of the present application, the light source array side and the color conversion structure are combined and bonded together to form a display device, which includes:

The color conversion structure is sequentially subjected to cleaning, preprocessing and area allocation processing to obtain a processed structure;

Applying frame glue on the treated structure;

The light source array is assembled and bonded with the processed structure through the frame glue, and a lamination process and photocuring process are performed using a coating process to obtain a display device.

Additional features and advantages of the disclosure will be set forth in the description which follows, and, in part, will be apparent from the description, or may be learned by practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the specification, claims and appended drawings, and the details of one or more embodiments of the disclosure are set forth in the accompanying drawings and description below.

In order to make the above objects, features and advantages of the present disclosure more obvious and understandable, optional embodiments are listed below and described in detail with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, It is said that other drawings can be obtained based on these drawings without exerting creative labor.

Figure 1 is a schematic diagram of the principle structure of a traditional display device;

Figure 2 is a schematic structural diagram of a display device provided by one or more embodiments of the present disclosure;

Figure 3 is another schematic structural diagram of a display device provided by one or more embodiments of the present disclosure;

Figure 4 is another structural schematic diagram of a display device provided by one or more embodiments of the present disclosure;

Figure 5 is another structural schematic diagram of a display device provided by one or more embodiments of the present disclosure;

Figure 6 is a schematic top structural view of a display device provided by one or more embodiments of the present disclosure;

FIG. 7 is a schematic flowchart of a method for manufacturing a display device provided by one or more embodiments of the present disclosure;

Figure 8 is a schematic structural diagram of a process for producing a specular reflective layer according to one or more embodiments of the present disclosure;

Figure 9 is a schematic structural diagram of a process for producing a color conversion structure provided by one or more embodiments of the present disclosure;

Figure 10 is a schematic flow structure diagram of a yellow light process provided by one or more embodiments of the present disclosure;

Figure 11 is a schematic flow structure diagram of a pair bonding process provided by one or more embodiments of the present disclosure;

Figure 12 is a schematic structural diagram of a display device provided by one or more embodiments of the present disclosure;

Explanation of reference symbols:

10-light source array; 20-color conversion structure; 30-encapsulation layer; 101-second drive backplane; 102-light source chip; filling layer-103; 201-specular reflection layer; 202-color conversion layer; 203-color filter Light layer; 204-black matrix layer; 205-light shielding layer; 206-first drive backplane.

Detailed ways

In order to understand the above objects, features and advantages of the present disclosure more clearly, the solutions of the present disclosure will be further described below. It should be noted that, as long as there is no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described here; obviously, the embodiments in the description are only part of the embodiments of the present disclosure, and Not all examples.

The terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first camera and the second camera are used to distinguish different cameras, rather than to describe a specific order of the cameras.

In the embodiments of the present disclosure, words such as “exemplary” or “for example” mean examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in the present disclosure is not intended to be construed as preferred or advantageous over other embodiments or designs. To be precise, the use of words such as "exemplary" or "such as" is intended to present relevant concepts in a specific manner. In addition, in the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "plurality" refers to both one or more than two.

It is understandable that with the vigorous development of display technology, display products have become indispensable social and entertainment tools in people's daily lives. In terms of practicality, the display product can be added with the function of specular reflection to form a mirror display to expand its Scope of use. Among them, mirror displays can be applied to different places such as gyms, star hotels, and high-end clubs. In order to enable users to better use display products with specular reflection functions, the structural design and production of the products are very important.

Please refer to Figure 1. Currently, the mirror display in the related art combines the display liquid crystal display and the mirror display glass through bonding and other methods to form a mirror screen. When the display is turned on, the mirror display glass transmits the light through the mirror display. The intensity of the light emitted is much greater than the natural reflected light formed on the surface of the mirror display glass. The light from the display screen can be transmitted through the LCD, so the imaging content of the display can be seen. When the display is turned off, the screen is basically in a dark state. At this time, only the reflection of natural light on the mirror surface can be observed through the mirror surface, and the mirror display glass at this time shows the effect of mirror reflection. However, the LCD device in this solution has low luminous brightness, and the mirror display glass will further cause brightness loss, so that when it is in a high-brightness environment, the insufficient brightness of the LCD device will lead to poor display effects, and when the LCD When the display device is turned on, display and reflection phenomena exist in the display area at the same time. The superimposed use of reflection and display functions will lead to poor effects of both.

Based on the above defects, the present application provides a display device. Compared with the existing technology, this display device is equipped with a light source array and a color conversion structure, and the specular reflection layer and the color conversion layer are alternately arranged to achieve a reflective area. It is independent from the display area, so that the reflection area does not need to be compatible with both reflection and light transmission functions at the same time, completely reflecting natural light, improving the specular reflection effect, and by setting up a color conversion structure, it can effectively convert the light emitted by the light source array into the sub-unit where it is located. The light of the corresponding color in the pixel area avoids the problem of poor contrast caused by the mixing of reflected light and display light, thus greatly improving the reflection and display effects.

The display devices provided in this embodiment may include but are not limited to liquid crystal panels, electronic paper, LED panels, smartphones, tablet computers, televisions, monitors, notebook computers, digital cameras, smart wearable devices, navigators, etc. Products or components with display functions, etc. Optionally, the smart wearable device can be a smart bracelet, a wearable smart watch, etc.

In order to facilitate understanding and explanation, the display device and the manufacturing method of the display device provided by the embodiments of the present application are described in detail below through FIGS. 2 to 12 .

FIG. 2 is a schematic structural diagram of a display device provided by one or more embodiments of the present disclosure. As shown in FIG. 2 , the display device includes a plurality of mutually independent sub-pixel areas, a light source array 10 and a light source array located on the light source array 10 . The color conversion structure 20 on the light exit side. The color conversion structure 20 includes a specular reflection layer 201 and a plurality of mutually independent color conversion layers 202 alternately arranged with the specular reflection layer 201. Each color conversion layer 202 corresponds to each sub-pixel area in a one-to-one manner; The light emitted by the light source array 10 irradiates each sub-pixel area; each color conversion layer 202 is configured to convert the light emitted by the light source array 10 through the color gamut to obtain light of the corresponding color in the sub-pixel area for display; specular reflection Layer 201 is configured to reflect natural light for a specular display.

It should be noted that the display device in this embodiment can be: a liquid crystal display (LCD), an organic light-emitting diode (OLED) display device, a light emitting diode (light emitting diode, LED), Micro LED display devices (Micro LED), mini LED display devices, etc.

Among them, Mini LED is a micro-light-emitting diode, which uses LED miniaturization and matrix technology, which refers to a high-density, tiny-sized LED array integrated on a chip. Micro LED consumes far less power than LCD, and OLED also belongs to its own category. Emitting light can reduce the distance between pixels from millimeter level to micron level, and the color saturation is close to OLED.

It should be noted that Micro LED arrays are generally produced by the Micro Transfer Print method. After the LED bare chips are separated from the sapphire substrate through laser lift-off technology, a patterned transfer substrate is used to separate the LED bare chips. It is adsorbed from the supply substrate and transferred to the receiving substrate to obtain the Micro LED array.

Specifically, when the display device is an LCD display device, the light source array may include an edge-type backlight source or a direct-type backlight source; when the display device is an OLED display device, the light source array may include an OLED device; when the display device is a Micro LED display When the display device is a mini LED display device, the light source array may include a mini LED chip.

Optionally, the above-mentioned multiple independent sub-pixel areas may include red sub-pixel areas, green sub-pixel areas and blue sub-pixel areas, and may also include sub-pixel areas of other colors.

The structure of the above-mentioned light source array 10 may be a rectangular structure, a circular structure, or any other structure of any shape, which is not limited in the embodiments of the present application. The light source array can emit light around to emit the light to the color conversion structure located on the light exit side of the light source array, so that the color conversion structure converts the color gamut of the light into light of the corresponding color in the sub-pixel area where it is located.

The above-mentioned color conversion structure 20 may include a specular reflection layer 201 and a plurality of mutually independent color conversion layers 202 alternately arranged with the specular reflection layer 201, wherein each color conversion layer 202 corresponds to each sub-pixel area one-to-one. When the sub-pixel When the area includes a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area, the corresponding color conversion layers are the red conversion layer R-QD, the green conversion layer G-QD and the blue conversion layer B-QD respectively.

It should be noted that the above-mentioned color conversion layer 202 can be made of color conversion material, wherein the color conversion material refers to a material that converts the light emitted by the light source array into the light of the corresponding color in the sub-pixel area, wherein each different sub-pixel The color conversion layers corresponding to the pixel areas are different, and accordingly, the color conversion materials corresponding to the different color conversion layers are also different. For example, the color conversion material corresponding to the red conversion layer R-QD is used to convert the light emitted by the light source array into the light of the corresponding color in the red sub-pixel area, and the color conversion material corresponding to the green conversion layer G-QD is used to convert the light emitted by the light source array into light. The light is converted into the light of the corresponding color in the green sub-pixel area, and the color conversion material corresponding to the blue conversion layer B-QD is used to convert the light emitted by the light source array into the light of the corresponding color in the blue sub-pixel area.

Optionally, the above-mentioned color conversion material can be a quantum dot (QD) material or an organic fluorescent dye. Among them, quantum dot (QD) material is a new type of nanomaterial with a grain diameter between 2-20 nanometers. By applying a certain electric field or light pressure to this nano-semiconductor material, it can emit a concentrated energy spectrum after being excited. Very pure high quality monochromatic light.

It should be noted that the material of the specular reflection layer 201 may be a metal material, such as silver or aluminum. The light transmittance of the specular reflection layer 201 is 100%, and its film thickness can be any thickness between 1 nm and 10 um.

It can be understood that quantum dot (QD) materials have the characteristics of adjustable luminescence wavelength, wide wavelength coverage, narrow and symmetrical fluorescence spectrum, and high luminous efficiency, and can efficiently achieve red and green color conversion. Quantum dot (QD) display technology is an innovative semiconductor nanocrystal technology that can accurately transmit light, effectively improve the color gamut value and viewing angle of the display, make colors purer and more vivid, and make color performance more intense. Display devices using this technology can not only produce dynamic colors with a wider color gamut, but also display true color palettes in picture quality, surpassing backlight technology in the traditional sense.

The display device provided in the embodiment of the present application includes a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure located on the light exit side of the light source array. The color conversion structure includes a specular reflection layer and a plurality of mutually disposed alternating with the specular reflection layer. Independent color conversion layer, each color conversion layer corresponds to each sub-pixel area one-to-one, and the light emitted by the light source array illuminates each sub-pixel area; each color conversion layer is used to convert the light emitted by the light source array through the color gamut to obtain The sub-pixel area corresponds to the color of light, and the specular reflection layer is used to reflect natural light for specular display. Compared with the existing technology, this display device can realize that the reflection area and the display area are independent of each other because the specular reflection layer and the color conversion layer are alternately arranged, so that the reflection area does not need to be compatible with reflection and light transmission functions at the same time, achieving complete reflection of natural light. , improves the specular reflection effect, and by setting up a color conversion structure, the light emitted by the light source array can be fully and effectively converted into the light of the corresponding color in the sub-pixel area, avoiding the problem of poor contrast caused by the mixing of reflected light and display light. , thereby greatly improving the reflection and display effects.

Optionally, please continue to refer to FIG. 2. The above-mentioned color conversion structure 20 also includes a plurality of independent color filter layers 203. Each color conversion layer 202 and the corresponding color filter layer 203 are connected to each other, and the color The color filter layer 203 is located on the side of the layer where the color conversion layer 202 is located away from the light source array 10. The color filter layer 203 is used to filter out the residual light that has not been converted into the corresponding color of the sub-pixel area to adjust the picture. show.

Among them, the above-mentioned color filter layer 203 is also called a CF (Color Filter) layer, which can be a color filter. The color filter is an optical filter that can accurately select a small range of light waves to pass through, and filters To remove other bands that are not expected to pass, the residual light that has not been converted into the color gamut into the corresponding color of the sub-pixel area is filtered out, thereby using the principle of light filtering to generate three colors of red, green and blue, and according to the driver Depending on the IC control voltage, the three colors are mixed according to different types to produce a variety of colors to achieve colorful screen displays.

When the color conversion layer is a red conversion layer R-QD, the corresponding color filter layer is a red filter layer R-CF; when the color conversion layer is a green conversion layer G-QD, the corresponding color filter layer is green Filter layer G-CF; when the color conversion layer is blue conversion B-QD, the corresponding color filter layer is green filter layer B-CF.

In this embodiment, the color filter layer and the corresponding color conversion layer may be connected through bonding, for example, through optical glue. The thickness of the above-mentioned color filter layer can be any thickness between 1 nm and 10 um.

Optionally, please refer to Figure 3, which is another structural schematic diagram of a display device provided by one or more embodiments of the present disclosure. The color conversion structure 20 also includes a black matrix layer 204 and a light-shielding layer 205. The light-shielding layer 205 is located on the side of the layer where the specular reflection layer 201 is located close to the light source array 10. The black matrix layer 204 is connected to the specular reflection layer 201 and the light shielding layer 205 respectively and is arranged between the specular reflection layer 201 and the light shielding layer 205; the black matrix layer 204 and Each color filter layer 203 is arranged alternately, and the light shielding layer 205 and each color conversion layer 202 are arranged alternately;

The black matrix layer 204 is used to shield light and prevent crosstalk between the light irradiated to each color filter layer; the light shielding layer 205 is used to shield light and prevent crosstalk between the light irradiated to each color conversion layer.

Specifically, the black matrix layer 204 may be made of black organic material, such as Cr, CrOx, black resin, etc. The thickness of the black matrix layer 204 can be any thickness between 1 nm and 10 um.

In this embodiment, black matrix layers are alternately arranged around the color filter layers of each sub-pixel area, which can separate each sub-pixel and absorb the light emitted from the color filter layer, thereby reducing the optical crosstalk between pixels and improving the The resolution and contrast of the display screen further improve the display quality.

The above-mentioned light-shielding layer 205 is also called the bank layer. Its material can be any gray organic material, and the film thickness of the light-shielding layer can be any thickness between 1 nm and 10 um. The film thickness of the light shielding layer 205 may be greater than the film thickness of the black matrix layer 204 .

Optionally, the black matrix layer, also known as the BM (Black Matrix) layer, can be connected to the specular reflection layer and the light-shielding layer respectively by bonding, for example, through photoresist.

Wherein, the film layer height of the above-mentioned color filter layer 203 is greater than the film layer height of the black matrix layer 204, and the film layer height of the color conversion layer 202 is greater than the film layer height of the light shielding layer 205. The maximum height may be, for example, any height between 0 and 10 microns,

It should be noted that since the film layer height of the color conversion layer is greater than the film layer height of the light-shielding layer, the quantum dots in the color conversion layer can completely absorb and convert the light emitted by the light source array, and by changing the color filter layer The height of the film layer is greater than that of the black matrix layer, so that the light that has not been converted into the color gamut is completely filtered, thereby improving the utilization rate of light, thus greatly improving the light display effect.

In this embodiment, light-shielding layers are alternately provided around the color conversion layers of each sub-pixel area, which can separate each sub-pixel and absorb the light emitted from the color conversion layer, thereby reducing optical crosstalk between pixels and improving the display screen. The resolution and contrast further improve the display quality.

Optionally, please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a display device provided by one or more embodiments of the present disclosure. The above-mentioned color conversion structure also includes a first driving backplane 206. The plate 206 is located on the side of the layer where the specular reflection layer 201 and the color conversion layer 202 are located, away from the light source array 10 .

Specifically, the above-mentioned first driving backplane can be a passive driving backplane or an active driving backplane. The material of the first driving backplane can be a printed circuit board (Printed Circuit Board, PCB) material or glass. The material can also be flexible polyimide (Polyimide, PI) material.

It should be noted that the printed circuit board can be a flexible circuit board. The flexible circuit board is a high-strength, reliable and excellent flexible printed circuit board supported by polyimide or polyester film as a base material. Can include rigid components formed of aluminum or stainless steel. Polyimide refers to a polymer containing an imide structure in the main chain of its molecular structure.

The above-mentioned first driving backplane 206 may be connected to the specular reflection layer 201 and the color conversion layer 202 through bonding, which may be bonded through photoresist, for example.

Optionally, the above-mentioned light source array includes a second driving backplane 101 and a light source chip 102 connected to the second driving backplane 101 . The light source chip 102 is used to emit light and illuminate the color conversion structure 20 .

Among them, the above-mentioned light source chip can be a small-pitch LED chip, a Mini LED chip, a Micro LED chip or an LED package.

The above-mentioned LED chip is a solid-state semiconductor device, a semiconductor wafer, which mainly converts electrical energy into light energy. The LED chip can be made of materials such as gallium phosphide (GaP), gallium aluminum arsenide (GaAlAs), gallium arsenide (GaAs), gallium nitride (GaN), etc., and its internal structure has unidirectional conductivity. The chip's soldering pads are generally gold pads or aluminum pads. The pad shapes include round, square, cross, etc. LED chips are divided into surface-emitting types (most of the light is emitted from the surface of the chip) and five-sided emitting types (more light is emitted from the surface and sides) according to the light-emitting parts.

The above-mentioned second driving backplane can be a passive driving backplane or an active driving backplane. The material of the second driving backplane can be a printed circuit board (Printed Circuit Board, PCB) material or a glass material. It can be made of flexible polyimide (PI) material.

Optionally, the above-mentioned LED chip can be a blue LED chip or an ultraviolet LED chip. Optionally, when the LED chip is a blue LED chip, it can emit blue light and illuminate it on the color conversion structure, so that the color conversion structure can perform color gamut conversion of the emitted blue light into light of the corresponding color in the sub-pixel area through the color conversion layer. That is, it can be converted into red light, green light and blue light.

It should be noted that when the LED chip is an ultraviolet LED chip, it can emit ultraviolet light to illuminate the color conversion structure. At this time, an additional color conversion layer needs to be added to first perform color gamut conversion processing on the ultraviolet light into blue light. Then, the color gamut of the blue light is converted into the light of the corresponding color in the sub-pixel area through the color conversion layer in the color conversion structure, so that it can finally be converted into red light, green light and blue light.

Optionally, the above-mentioned light source array 10 may also include a filling layer 103. The filler material of the filling layer may be, for example, gray, white or black organic material. The spaced light source chips are fixed through the filling layer to prevent the light source chips from loosening, thus improving the luminous efficiency.

Optionally, please refer to FIG. 5 . FIG. 5 is another structural schematic diagram of a display device provided by one or more embodiments of the present disclosure. The display device also includes an encapsulation layer 30 , and the light source array 10 communicates with the color through the encapsulation layer 30 . The switching structures 20 are interconnected.

The above-mentioned encapsulation layer may include a sealant and a peripheral frame. In this embodiment, by filling the sealant between the light source array and the color conversion structure, the light source array and the color conversion structure can be tightly connected to each other, and through the peripheral frame It is fixed to block water and oxygen to prevent water and oxygen from causing quenching of the quantum dot material in the color conversion layer or the light source chip.

Please refer to Figure 6. Figure 6 is a schematic top structural view of a display device provided by one or more embodiments of the present disclosure. The display device includes a reflective area and a display area. The display area includes RGB pixel units. The reflective area includes a mirror. The reflective layer, because the first driving backplane is coated with high-reflectivity metal, can reflect light to achieve specular reflection function. In the display area, the driving system drives the light source chip to emit light to excite quantum dots in the corresponding sub-pixel area through the color conversion layer. The material emits light, thereby displaying the image.

Furthermore, during use of the above-mentioned display device, when performing screen display, the light source chip in the light source array can be driven by the driving system to emit light. For example, when the light source chip is a blue LED chip, it emits blue light, and the emitted light is emitted. The light is irradiated to the color conversion structure located on the light exit side of the light source array. The color conversion structure converts the color gamut of the light emitted by the light source chip into the light of the corresponding color in the sub-pixel area through each independent color conversion layer, that is, through the red conversion layer respectively. R-QD, green conversion layer G-QD and blue conversion layer B-QD perform color gamut conversion processing on the light emitted by the light source chip to obtain red light of the corresponding color in the red sub-pixel area and green light of the corresponding color in the green sub-pixel area. The blue light corresponding to the blue sub-pixel area, the light emitted by the light source chip passes through the light-shielding layer bank layer to prevent crosstalk between the light irradiated to the various color conversion layers, and will pass through the red conversion layer R-QD and the green conversion layer The remaining light that has not been color gamut converted after G-QD and blue conversion layer B-QD processing is passed through the red filter layer R-CF, the green filter layer G-CF and the blue filter layer B-CF respectively. Filter out, and pass the unfiltered residual light through the black matrix layer BM layer to block light and prevent crosstalk between the light irradiated to each color filter layer, thereby reducing red light, green light and blue light according to a certain proportion and intensity. Mix and process to get a variety of colorful pictures.

When the above display device performs mirror display, it can emit natural light to the specular reflection layer in the color conversion structure to reflect the natural light for mirror display, thereby realizing the specular reflection function by reflecting light.

It should be noted that the wavelengths corresponding to the above three primary colors of red, green, and blue are 700nm, 546.1nm, and 435.8nm respectively. The three primary colors of light can present various light colors when mixed in a certain proportion. The LCD screen is composed of small pixels of three emitting colors: red, green, and blue. These three primary colors are mixed according to different proportions and strengths to achieve full-color picture display, which can be in different forms, such as text, patterns, or images.

Among them, full-color display includes but is not limited to RGB three-primary color light solutions of red light, green light and blue light. For example, it can also be a CMYK four-primary color scheme of cyan, magenta, yellow and black.

Optionally, the above-mentioned mixing methods according to different proportions and strengths can add and subtract colors as needed. Red plus blue plus green equals white, red plus green equals yellow, red plus blue equals purple, and blue plus green. Equal to cyan, different mixing ratios will produce more colors.

The display device provided in this embodiment is provided with a color conversion structure and a light source array. Compared with the liquid crystal display in the prior art, it has the advantages of high brightness, wide color gamut, and fast response speed, and the specular reflection layer is connected with multiple independent color The conversion layers are alternately arranged to make the reflection area and the display area independent of each other. Therefore, the reflection area does not need to be compatible with reflection and light transmission. The specular reflection layer can be made opaque and completely reflects the natural light form of the environment, thereby completely achieving better Specular reflection effect, and the display area is combined with the color conversion layer through the light source chip to achieve higher brightness and color gamut, avoiding the problem of poor contrast caused by the mixing of reflected light and display light, thereby greatly improving the reflection and display effect.

On the other hand, an embodiment of the present application provides a method of manufacturing a display device. Figure 7 is a schematic flowchart of a method of manufacturing a display device provided by one or more embodiments of the present disclosure. As shown in Figure 7, the method includes:

S101. Provide a first driving backplane, and form a color conversion structure on the first driving backplane; the color conversion structure includes a plurality of mutually independent color conversion layers with specular reflection layers and specular reflection layers alternately arranged, and each color conversion layer has a Each sub-pixel area has a one-to-one correspondence. The specular reflection layer is used to reflect natural light for mirror display; each color conversion layer is used to convert the color gamut of the light emitted by the light source array into the light of the corresponding color in the sub-pixel area.

Specifically, the first driving backplane can be obtained, and a specular reflection layer can be deposited on the first driving backplane according to sub-pixel intervals, and then a black matrix (BM) layer can be formed on the specular reflection layer using a yellow light process, and a yellow light process can be used to form a black matrix (BM) layer. The light process forms a black matrix layer on the specular reflective layer, and the yellow light process is used to form multiple color filter (CF) layers at intervals between the specular reflective layers. The height of the color filter layer is greater than the height of the black matrix layer, and then the yellow light process is used to form a black matrix layer on the specular reflective layer. The process forms a light shielding (bank) layer on the black matrix (BM) layer, and deposits a corresponding color conversion (QD) layer on each color filter (CF) layer to obtain a color conversion structure. The height of the color conversion layer is greater than the light shielding layer. The height of the layer.

Among them, please refer to Figure 8. Figure 8 is a description of the manufacturing process of the lens reflective layer of the present disclosure based on the embodiment shown in Figure 2. After obtaining the first driving backplane 206, it can be The specular reflection layer 201 is deposited on the first driving backplane 206 according to the preset sub-pixel interval by a deposition (Physical Vapor Deposition, PVD) method. The preset sub-pixel area spacing is the spacing between the corresponding sub-pixel areas when each sub-pixel performs reasonable and clear imaging determined in advance based on actual requirements.

It should be noted that the above physical vapor deposition method refers to using physical methods under vacuum conditions to vaporize the surface of a metal material into gaseous atoms or molecules, or partially ionize it into ions, and through a low-pressure gas (or plasma) process, in the first A thin film of metal material is deposited on the surface of the driving backplane to form a specular reflection layer. Optionally, the metal material can be silver or aluminum, and its deposition thickness can be 1nm-10um.

Among them, physical vapor deposition can include vacuum evaporation, sputtering coating, arc plasma mode, ion plating, molecular beam epitaxy, etc. Vacuum evaporation can use corresponding vacuum coating equipment, which can include a vacuum evaporation coating machine, a vacuum sputtering coating machine and a vacuum ion coating machine.

As shown in FIG. 9 , after depositing the specular reflection layer 201 on the first driving backplane 206 , a yellow light process can be used to deposit a black matrix (BM) layer 204 on the specular reflection layer 201 , and a yellow light process can be used to deposit a black matrix (BM) layer 204 on the specular reflection layer 201 . A plurality of color filter (CF) layers 203 are deposited at intervals, and the plurality of color filter (CF) layers may include a red filter layer R-CF, a green filter layer G-CF, and a blue filter layer B-CF, The red filter layer R-CF, the green filter layer G-CF and the blue filter layer B-CF have the same film height, and a yellow light process is used to deposit light shielding (bank) on the black matrix (BM) 204 layer. ) layer 205, the film thickness of the light shielding (bank) layer can be greater than the film thickness of the black matrix (BM) layer, and then the corresponding color conversion (QD) layer 202 is deposited on each color filter (CF) layer 203 , that is, the red conversion layer R-QD is deposited on the red filter layer R-CF, the green conversion layer G-QD is deposited on the green filter layer G-CF, and the blue conversion layer is deposited on the blue filter layer B-CF. Layer B-QD, the red conversion layer R-QD, green conversion layer G-QD and blue conversion layer B-QD have the same film thickness, and the height of each color conversion layer 202 is greater than the height of the light shielding layer 205, thus obtaining Color conversion structure.

It should be noted that, as shown in Figure 10, the above yellow light process may include glue coating (for example, spin coating), soft bake (Soft bake), exposure and development (Exposure), hard bake (Post exposure bake) ), (Development) and other steps. The above display device deposits a black matrix (BM) layer, a red filter layer R-CF, a green filter layer G-CF, a blue filter layer B-CF, a light shielding (bank) layer, a red conversion layer R-QD, Both the green conversion layer G-QD and the blue conversion layer B-QD can use the yellow light process to achieve deposition operations. Optionally, the thickness of each of the above film layers can be 1nm-10um.

S102. Provide a second driving backplane, and form a light source array on the second driving backplane.

Specifically, a second driving backplane and a light source chip can be obtained, and the light source chip can be an LED chip. The light source chip can be bonded to the second driving backplane through photoresist bonding.

S103. The light-emitting side of the light source array is combined with the color conversion structure to form a display device. The display device includes a plurality of mutually independent sub-pixel areas.

Specifically, please refer to Figure 11. After the color conversion structure is obtained, the color conversion structure (QDCF) obtained above can be sequentially subjected to cleaning (Cleaning), pre-treatment (Pre-treatment) and area allocation processing (Dam Dispensing). , obtain the processed structure, and coat the processed structure with frame glue (Fill Dropping), then assemble the light source array with the processed structure through the frame glue, and use the lamination process for lamination. (Lamination) and photocuring (UV Curing) to obtain a display device.

Among them, when cleaning the color conversion structure, the color conversion structure can be treated by wind blowing, and then preprocessed to detect whether the color conversion structure can normally perform color gamut conversion of light, for example, to check whether it can emit light. red light, green light and blue light, and then perform area distribution processing to obtain the processed structure, and evenly coat the frame glue on the processed structure, the frame glue can be polypropylene, for example, and then pass the light source array through the frame The glued and processed structure is laminated and photocured using a film coating process to obtain a display device.

It should be noted that lamination is to combine materials with different functions through bonding and lamination methods to form a composite with multiple functions. In this embodiment, the processed structure and the light source array are combined together through lamination processing.

The above-mentioned light curing process can be an ultraviolet (Ultra-Violet Ray, UV) curing process. The UV curing process is a kind of irradiation of chemicals with UV light, so that the scale "photoinitiator" contained in the chemical is exposed to the UV light source. "Radiation hardening technology" that causes the "polymerized monomers" contained in the chemical to bond and harden in a very short time (less than 1 second) due to stimulation. In this embodiment, the laminated structure is irradiated with UV light to harden it to obtain a display device.

In this embodiment, the color conversion structure is bonded to the second drive backplane through area allocation and dispensing packaging, and high-precision bonding equipment is used to bond the light source chip and the color conversion layer one-to-one. The light emitted by the light source chip can be caused to illuminate the color conversion layer.

Optionally, please refer to FIG. 12 , which is a schematic structural diagram of a display device provided by one or more embodiments of the present disclosure. The display device also includes a microprocessor 201 and a memory 202 , where the microprocessor 201 It can include one or more processing cores, such as a 4-core microprocessor, an 8-core microprocessor, etc. The microprocessor 201 can adopt at least one hardware form among digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). accomplish.

The microprocessor 201 may also include a main processor and a co-processor. The main processor is a processor used to process data in the wake-up state, also called a central processing unit (Centarl Processing Unit, CPU). The co-processor The processor is a low-power processor used to process data in standby mode.

In addition, the microprocessor 201 can be integrated with a graphics processor (Graphics Processing Unit, GPU), and the GPU is used to render and draw the content that needs to be displayed on the display screen. In some embodiments, the microprocessor 201 can also include Artificial Intelligence (AI) processor, which is used to process computing operations related to machine learning.

Memory 202 may include one or more computer-readable storage media, which may be non-transitory. Memory 202 may also include high-speed random access memory, and non-volatile memory, such as one or more disk storage devices, flash memory storage devices.

In some embodiments, the display device may also include a peripheral device interface 203 and at least one peripheral device. The microprocessor 201, the memory 202 and the peripheral device interface 203 may be connected through a bus or a signal line. Each peripheral device can be connected to the peripheral device interface 203 through a bus, a signal line or a circuit board.

Specifically, peripheral devices include, but are not limited to, radio frequency circuit 204, sensor 205, and power supply 206. The peripheral device interface 203 may be used to connect at least one input/output (I/O) related peripheral device to the microprocessor 201 and the memory 202 . In some embodiments, the microprocessor 201, the memory 202, and the peripheral device interface 203 are integrated on the same chip or circuit board; in some other embodiments, any of the microprocessor 201, the memory 202, and the peripheral device interface 203 One or two may be implemented on a separate chip or circuit board, which is not limited in the embodiments of the present application.

The radio frequency circuit 204 is used to receive and transmit radio frequency (Radio Frequency, RF) signals, also called electromagnetic signals. Radio frequency circuit 204 communicates with communication networks and other communication devices through electromagnetic signals. The radio frequency circuit 204 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 204 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. Radio frequency circuitry 204 can communicate with other devices through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to metropolitan area networks, mobile communication networks of all generations (2G, 3G, 4G and 5G), wireless local area networks and/or wireless fidelity (Wireless Fidelity, WiFi) networks. In some embodiments, the radio frequency circuit 204 may also include near field communication (Near Field Communication, NFC) related circuits.

Sensors 205 include one or more sensors that provide various aspects of status assessment for the display device. Among them, the sensor 205 includes an acceleration sensor. For example, the sensor 205 can detect the open/closed state of the electronic device 200, and can also detect the position change of the electronic device 200, the presence or absence of contact with the electronic device 200, the orientation or acceleration/deceleration of the electronic device 200 and the display device. temperature changes. The sensor 205 may also include an optical sensor, such as a complementary metal oxide semiconductor (CMOS) or charge-coupled device (CCD) photosensitive imaging element, for use in imaging applications. In some embodiments, the sensor 205 may also include a pressure sensor, a Hall sensor, a proximity sensor, a gyroscope sensor, and a magnetic sensor.

Those skilled in the art can understand that the structure shown in FIG. 12 does not constitute a limitation on the display device, and may include more or fewer components than shown, or combine certain components, or adopt different component arrangements.

It should be noted that the display devices involved in the embodiments of the present disclosure may include, but are not limited to, liquid crystal panels, electronic paper, LED panels, smartphones, tablet computers, televisions, monitors, notebook computers, and digital cameras. , smart wearable devices, navigators and other products or components with display functions.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above embodiments only express several implementation modes of the present disclosure, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent disclosed shall be determined by the appended claims.

Industrial applicability

The display device and the manufacturing method of the display device provided by the present disclosure can realize that the reflection area and the display area are independent of each other, so that the reflection area does not need to be compatible with reflection and light transmission functions at the same time, completely reflecting natural light, improving the reflection effect of the lens, and avoiding reflection at the same time. The problem of poor contrast caused by the mixing of light and display light greatly improves the reflection and display effects, and has strong industrial practicability.

Claims (16)

1. A display device includes a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure located on the light exit side of the light source array. The color conversion structure includes a specular reflection layer and a plurality of mirror reflection layers alternately arranged with the specular reflection layer. mutually independent color conversion layers, each of the color conversion layers corresponding to each of the sub-pixel areas;

   The light emitted by the light source array irradiates each of the sub-pixel areas; each of the color conversion layers is configured to convert the light emitted by the light source array through color gamut conversion to obtain light of a corresponding color in the sub-pixel area where it is located, To perform picture display; the specular reflection layer is configured to reflect natural light to perform specular display.
2. The display device according to claim 1, wherein the color conversion structure further includes a plurality of mutually independent color filter layers, each of the color conversion layers and the corresponding color filter layer are connected to each other, and the The color filter layer is located on a side of the color conversion layer facing away from the light source array. The color filter layer is configured to convert residual light that has not been color gamut converted into a corresponding color in the sub-pixel area where it is located. Filter out for screen display.
3. The display device according to claim 2, wherein the color conversion structure further includes a black matrix layer and a light-shielding layer, the light-shielding layer is located on a side of the specular reflection layer close to the light source array, and the black The matrix layer is connected to the specular reflection layer and the light shielding layer respectively and is arranged between the specular reflection layer and the light shielding layer; the black matrix layer is alternately arranged with each of the color filter layers, and the light shielding layer layers and each of the color conversion layers are arranged alternately;

   The black matrix layer is configured to block light and prevent cross-talk between the light irradiated to the color filter layers; the light-shielding layer is configured to block light and prevent cross-talk between the light irradiated to the color conversion layers.
4. The display device according to claim 3, wherein a height of the color filter layer is greater than a height of the black matrix layer, and a height of the color conversion layer is greater than a height of the light shielding layer.
5. The display device according to claim 4, wherein the height of the color filter layer is 0-10 μm greater than the height of the black matrix layer, and the height of the color conversion layer is 0-10 μm greater than the height of the light shielding layer. 10μm.
6. The display device according to any one of claims 3-5, wherein the thickness of the light-shielding layer is 1 nm-10 μm.
7. The display device according to any one of claims 1 to 5, wherein the color conversion layer corresponding to each different sub-pixel area is made of different materials.
8. The display device according to claim 7, wherein the material of the color conversion layer is a quantum dot material or an organic fluorescent material.
9. The display device according to any one of claims 1 to 5, wherein the thickness of the specular reflection layer is 1 nm-10 μm.
10. The display device according to any one of claims 1 to 5, wherein the color conversion structure further includes a first driving backplane, the first driving backplane is located where the specular reflection layer and the color conversion layer are located. The side of the layer facing away from the light source array.
11. The display device according to any one of claims 1 to 5, wherein the light source array includes a second driving backplane and a light source chip connected to the second driving backplane, the light source chip being used to emit light and Irradiation to the color conversion structure.
12. The display device according to claim 11, wherein the light source array further includes a filling layer, the filling layer is filled in the outer periphery of the light source chip, and the light source chips are arranged at fixed intervals.
13. The display device according to any one of claims 1 to 5, wherein the display device further includes an encapsulation layer, and the light source array and the color conversion structure are connected to each other through the encapsulation layer.
14. A method of manufacturing a display device, wherein the method includes:

    A first driving backplane is provided, and a color conversion structure is formed on the first driving backplane; the color conversion structure includes a specular reflection layer and a plurality of mutually independent color conversion layers alternately arranged with the specular reflection layer, each The color conversion layer corresponds to each sub-pixel area in a one-to-one manner, and the specular reflection layer is configured to reflect natural light for specular display; each of the color conversion layers is configured to pass the light emitted by the light source array through the color Domain conversion to obtain the light of the corresponding color in the sub-pixel area for picture display;

    Provide a second driving backplane, forming a light source array on the second driving backplane;

    The light-emitting side of the light source array is combined with the color conversion structure to form a display device, which includes a plurality of mutually independent sub-pixel areas.
15. The method of claim 14, wherein forming a color conversion structure on the first driving backplane includes:

    Deposit a specular reflective layer on the first driving backplane according to preset sub-pixel intervals;

    Using yellow light technology to form a black matrix layer on the specular reflection layer;

    Using yellow light technology to form multiple color filter layers at intervals between the specular reflection layers, the height of the color filter layer is greater than the height of the black matrix layer;

    Use yellow light technology to form a light-shielding layer on the black matrix layer;

    A corresponding color conversion layer is deposited on each of the color filter layers to obtain a color conversion structure, and the height of the color conversion layer is greater than the height of the light shielding layer.
16. The method according to claim 14 or 15, wherein the light source array side and the color conversion structure are combined and combined to form a display device, including:

    The color conversion structure is sequentially subjected to cleaning, preprocessing and area allocation processing to obtain a processed structure;

    Applying frame glue on the treated structure;

    The light source array is assembled and bonded with the processed structure through the frame glue, and a lamination process and photocuring process are performed using a coating process to obtain a display device.

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