CN218974730U - Display device - Google Patents

Abstract

The utility model discloses a display device, which comprises a backlight module and an array substrate arranged on the light emitting side of a monochromatic light source corresponding to the backlight module, wherein the backlight module comprises the monochromatic light source, the array substrate comprises a substrate, and the substrate comprises glass materials and quantum dots, wherein light rays emitted from the monochromatic light source are at least partially converted into white light after being excited by the quantum dots. The utility model can improve the phenomenon that the liquid crystal display screen using the monochromatic light LED backlight module has variegated light due to insufficient excitation of quantum dots in the edge area.

Description

Display device

Technical Field

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

Background

QDs, collectively known as "Quantum Dot," are translated to Quantum dots, which are nanoscale semiconductors that emit light at a specific frequency by applying a certain electric field or light pressure to the nanoscale semiconductor material, and the frequency of the emitted light varies with the size of the semiconductor, so that changing the size of the Quantum Dot controls the color of the emitted light. The quantum dot technology is a technology for enhancing comprehensive image quality performance such as color gamut, brightness and the like by using the special materials in the steps of light emission, color development and imaging of televisions.

At present, the main stream of quantum dot televisions in the market is actually a product formed by using a quantum dot film and a traditional backlight optical module scheme, but the scheme has the defects that as a backlight light source is mainly a light emitting diode emitting blue light, the emergent light of the light emitting diode is in lambertian distribution, namely the emergent light intensity of a light emitting center is larger than the emergent light intensity of an edge, and the light at the edge of the backlight module is mainly from the light emitting diode positioned at the edge position, so that when the quantum dot film passes through, the blue light wavelength is small, the light attenuation distance is small, the quantum dots at the edge of a film cannot be excited by the sufficient blue light, and therefore, the phenomenon of yellow all around of a white balance picture appears, and the traditional improvement of yellow all around is that butter is coated on a reflecting sheet, but the phenomenon cannot be completely cured, and only the inhibiting effect can be achieved.

Disclosure of Invention

The utility model mainly aims to provide a display device which aims to improve the phenomenon that a liquid crystal display screen using a monochromatic light LED backlight module has variegated and bright light due to insufficient excitation of quantum dots in an edge area.

In order to achieve the above object, the present utility model provides a display device, comprising:

the backlight module comprises a monochromatic light source; the method comprises the steps of,

the array substrate is arranged corresponding to the light emitting side of the monochromatic light source of the backlight module, and comprises a substrate which is composed of glass materials and quantum dots;

the light emitted from the monochromatic light source is at least partially converted into white light after being excited by the quantum dots.

Optionally, the monochromatic light source is a blue LED.

Optionally, the quantum dots include at least one of red quantum dots and green quantum dots.

Optionally, the quantum dots are formed in the substrate by a die bonding method.

Optionally, the glass material comprises silicate glass or silica glass.

Optionally, the quantum dot is selected from at least one of single component quantum dots, core-shell structured quantum dots, inorganic perovskite quantum dots, and organic-inorganic hybrid perovskite quantum dots.

Optionally, the display device further includes:

the color film substrate is arranged opposite to the array substrate and is arranged on one side of the array substrate, which is away from the backlight module;

the liquid crystal layer is arranged between the color film substrate and the array substrate, and is filled with liquid crystal materials.

Optionally, the display device further includes:

the upper polarizing plate is arranged on one side of the color film substrate, which is away from the array substrate;

the lower polarizing plate is arranged on one side of the array substrate, which is away from the color film substrate, and is positioned between the array substrate and the backlight module.

Optionally, the upper polarizing plate and the color film substrate are sealed and bonded through sealant; and/or the number of the groups of groups,

optionally, the lower polarizing plate and the array substrate are sealed and attached through sealant.

According to the display device provided by the utility model, the quantum dots and the glass material are manufactured into the display substrate, and the glass material is utilized to refract light rays at the center or the edge emitted by the monochromatic light source for multiple times, so that the light rays which are originally transmitted directly are partially refracted or diffused to the quantum dots at the edge of the substrate, so that the quantum dots are fully excited to form white light, and the situation that the edge is variegated and bright is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

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

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1000	Display device	200	Backlight module
100	Array substrate	300	Color film substrate
				1	Substrate base	400	Liquid crystal layer
11	Quantum dot	500	Upper polarizing plate
				12	Glass material	600	Lower polarizing plate

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

QDs, collectively known as "Quantum Dot," are translated to Quantum dots, which are nanoscale semiconductors that emit light at a specific frequency by applying a certain electric field or light pressure to the nanoscale semiconductor material, and the frequency of the emitted light varies with the size of the semiconductor, so that changing the size of the Quantum Dot controls the color of the emitted light. The quantum dot technology is a technology for enhancing comprehensive image quality performance such as color gamut, brightness and the like by using the special materials in the steps of light emission, color development and imaging of televisions.

At present, the main stream of quantum dot televisions in the market is actually a product formed by using a quantum dot film and a traditional backlight optical module scheme, but the scheme has the defects that as a backlight light source is mainly a light emitting diode emitting blue light, the emergent light of the light emitting diode is in lambertian distribution, namely the emergent light intensity of a light emitting center is larger than the emergent light intensity of an edge, and the light at the edge of the backlight module is mainly from the light emitting diode positioned at the edge position, so that when the quantum dot film passes through, the blue light wavelength is small, the light attenuation distance is small, the quantum dots at the edge of a film cannot be excited by the sufficient blue light, and therefore, the phenomenon of yellow all around of a white balance picture appears, and the traditional improvement of yellow all around is that butter is coated on a reflecting sheet, but the phenomenon cannot be completely cured, and only the inhibiting effect can be achieved.

In view of this, the present utility model proposes a display device 1000 to improve the phenomenon that the liquid crystal display panel using the monochromatic LED backlight module 200 is light-colored due to insufficient excitation of the quantum dots 11 in the edge region, and fig. 1 is an embodiment of the present utility model (hereinafter referred to as the present embodiment).

The utility model discloses a display device 1000, wherein the display device 1000 comprises a backlight module 200 and an array substrate 100, the backlight module 200 comprises a monochromatic light source, the array substrate 100 is arranged corresponding to the light emitting side of the monochromatic light source of the backlight module 200, the array substrate 100 comprises a substrate, the substrate consists of a glass material 12 and quantum dots 11, wherein light emitted from the monochromatic light source is at least partially converted into white light after being excited by the quantum dots 11.

According to the display device 1000 provided by the utility model, the quantum dots 11 and the glass material 12 are manufactured into the display substrate, and the glass material 12 is used for refracting light rays at the center or the edge emitted by the monochromatic light source for multiple times, so that the light rays which are directly transmitted are partially refracted or diffused to the quantum dots 11 positioned at the edge of the substrate, so that the quantum dots 11 are fully excited to form white light, and the situation that the edge is variegated and bright is eliminated.

According to the refraction principle of light, when light obliquely enters another medium from one medium, the propagation path of the light is deflected, so that the quantum dots 11 are combined with the glass material 12 by utilizing the refraction characteristic of the light, the light rays at the center or the edge emitted by the light source are refracted in the substrate by the substrate, so that enough correction light is excited by the quantum dots 11 at the edge area, thereby improving the color difference condition of the edge of the display, the substrate can be directly made of the transparent glass material 12, the glass has higher light transmittance, and the incident angle in the air is larger than the refraction angle in the glass, so that the light rays with large angles emitted by the monochromatic light source at the edge position are concentrated on the quantum dots 11 at the edge area by means of refraction, and optionally, the glass material 12 comprises silicate glass or silicon oxide glass, both of which are optical glass and have good thermal stability and hardness, the silicate glass and silicon oxide glass can be used for reflecting photons at the same time as the photonic crystal, and the photonic crystal can be used for emitting photons with a large-cycle light to the photonic crystal, and the photonic crystal can be arranged in the medium with a good refractive index or a large-cycle structure instead of the photonic crystal 12.

It is known that the quantum dot 11 film structure is generally adopted in the prior art to realize the white light emission of the backlight module 200. In order to improve the service life of the quantum dots 11, in this embodiment, the quantum dots 11 formed in the glass material 12 are provided with a plurality of quantum dots 11, that is, each quantum dot 11 is wrapped by the glass material 12, so that the quantum dots 11 are more stable and have longer service life due to the arrangement of the glass material 12, a large number of quantum dots 11 and the glass material 12 are mutually staggered to form media with different refractive indexes, so that better diffusion effect can be generated, so that the quantum dots 11 in the edge area can be excited by enough monochromatic light to form compensation light, and in addition, the quantum dots 11 can be independently prepared according to the luminous characteristics of the monochromatic light source without a film forming process flow by arranging the quantum dots 11 in the glass material 12. In another embodiment of the present utility model, a quantum dot 11 film structure may still be used as the quantum dot 11, the quantum dot 11 film is attached to the side of the substrate, which is away from the backlight module 200, and light passes through the substrate to reach the quantum dot 11 film, which can also achieve the effect of whitening the edge of the module, but in order to avoid the problem that the quantum dot 11 film is located outside the substrate and is prone to water and oxygen, a layer of packaging medium may be covered on the quantum dot 11 film, where the packaging medium includes but is not limited to polymers, resins, such as shadowless glue, AB glue, epoxy glue, etc., and all of the above materials are optically transparent, so as not to affect the optical performance of the quantum dot 11 film.

The current quantum dot 11 materials are mostly quantum dot 11 reagents, in the present utility model, the quantum dot 11 is selected from at least one of single component quantum dot 11, core-shell structure quantum dot 11, inorganic perovskite quantum dot 11 and organic-inorganic hybrid perovskite quantum dot 11, wherein the material of the single component quantum dot 11, the material of the core-shell structure quantum dot 11 and the material of the shell of the core-shell structure quantum dot 11 are selected from at least one of group II-VI compound, group III-V compound, group IV-VI compound or group I-III-VI compound independently from each other, for example, the group II-VI compound is selected from at least one of CdS, cdSe, cdTe, znS, znSe, znTe, znO, hgS, hgSe, hgTe, cdSeS, cdSeTe, cdSTe, znSeS, znSeTe, znSTe, hgSeS, hgSeTe, hgSTe, cdZnS, cdZnSe, cdZnTe, cdHgS, cdHgSe, cdHgTe, hgZnS, hgZnSe, hgZnTe, cdZnSeS, cdZnSeTe, cdZnSTe, cdHgSeS, cdHgSeTe, cdHgSTe, hgZnSeS, hgZnSeTe or HgZnSTe, the group III-V compound is selected from at least one of GaN, gaP, gaAs, gaSb, alN, alP, alAs, alSb, inN, inP, inAs, inSb, gaNP, gaNAs, gaNSb, gaPAs, gaPSb, alNP, alNAs, alNSb, alPAs, alPSb, inNP, inNAs, inNSb, inPAs, inPSb, gaAlNP, gaAlNAs, gaAlNSb, gaAlPAs, gaAlPSb, gaInNP, gaInNAs, gaInNSb, gaInPAs, gaInPSb, inAlNP, inAlNAs, inAlNSb, inAlPAs or InAlPSb, the group IV-VI compound is selected from at least one of SnS, snSe, snTe, pbS, pbSe, pbTe, snSeS, snSeTe, snSTe, pbSeS, pbSeTe, pbSTe, snPbS, snPbSe, snPbTe, snPbSSe, snPbSeTe or snpbse, and the group I-III-VI compound is selected from at least one of group II-III-VI compound or group II-VI compound is selected from at least one of ins2, cuInSe2 or ags 2.

Optionally, the plurality of quantum dots 11 are formed in the glass material 12 by a die bonding method, and the plurality of quantum dots 11 can be uniformly distributed in the glass material 12 by using a die bonding technology to obtain purer white light under the diffusion effect of the glass material 12, specifically, the glass material 12 can be formed by combining two layers of glass with the same material or different materials, one of the glass materials is provided with a plurality of quantum dot 11 accommodation areas, the quantum dots 11 are fixed in the quantum dot 11 accommodation areas by using a die bonding glue, and the other glass layer is covered on one side of the glass provided with the quantum dot 11 accommodation areas, so that the process flow is simple and the cost is low.

The white light is actually mixed by red, blue and green three colors, in the quantum dot 11 liquid crystal television, compensation light is usually excited by the quantum dot 11 by using monochromatic light, so as to be mixed with an original light source to emit white light, the quantum dot 11 needs to select quantum dots 11 emitting fluorescence with different wavelengths according to different colors of the light source, and different combinations of quantum dot 11 types can be selected according to the colors of the emitted light. A specific monochromatic light source may be an LED (light emitting diode).

Further, the display device 1000 further includes a color film substrate 300 and a liquid crystal layer 400, the color film substrate 300 is disposed opposite to the array substrate 100, the color film substrate 300 is disposed on one side of the array substrate 100 away from the light emitting side of the backlight module 200, the liquid crystal layer 400 is disposed between the color film substrate 300 and the array substrate 100, and the liquid crystal layer 400 is filled with liquid crystal. The color film substrate 300 generally includes a filtering area including red, green, blue and white sub-pixels near the surface of the liquid crystal layer 400, the liquid crystal layer 400 is used for controlling light transmission or blocking of light, the backlight module 200 disposed at one side of the array substrate 100 emits monochromatic light, white light is formed by the array substrate 100, and then red light, green light and blue light are emitted after the liquid crystal in the liquid crystal layer 400 exits to the color film substrate 300, so as to display a color image.

Further, the display device 1000 further includes an upper polarizing plate 500 and a lower polarizing plate 600, wherein the upper polarizing plate 500 is disposed on a side of the color film substrate 300 facing away from the array substrate 100, and the lower polarizing plate 600 is disposed on a side of the array substrate 100 facing away from the color film substrate 300 and between the array substrate 100 and the backlight module 200. By using the upper polarizer and the lower polarizer, the light emission of the display device 1000 can be controlled, thereby greatly improving the light emission efficiency of the display device 1000.

Further, the upper polarizing plate 500 and the color film substrate 300 are sealed and bonded by sealant. The lower polarizing plate 600 is sealed and attached to the array substrate 100 by a sealant, so as to achieve stable fixation.

Further, the type of display device may be a quantum dot television.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A display device, comprising:

the backlight module comprises a monochromatic light source; the method comprises the steps of,

the array substrate is arranged corresponding to the light emitting side of the monochromatic light source of the backlight module, and comprises a substrate which is composed of glass materials and quantum dots;

the light emitted from the monochromatic light source is at least partially converted into white light after being excited by the quantum dots.

2. The display device of claim 1, wherein the monochromatic light source is a blue LED.

3. The display device of claim 2, wherein the quantum dots comprise at least one of red quantum dots and green quantum dots.

4. The display device of claim 2, wherein the quantum dots are molded into the glass material by a die bonding method.

5. The display device of claim 4, wherein the glass material comprises silicate glass or silica glass.

6. The display device of claim 2, wherein the quantum dots are selected from at least one of single component quantum dots, core-shell structured quantum dots, inorganic perovskite quantum dots, and organic-inorganic hybrid perovskite quantum dots.

7. The display device according to claim 1, wherein the display device further comprises:

the color film substrate is arranged opposite to the array substrate and is arranged on one side of the array substrate, which is away from the backlight module;

the liquid crystal layer is arranged between the color film substrate and the array substrate, and is filled with liquid crystal materials.

8. The display device according to claim 7, wherein the display device further comprises:

the upper polarizing plate is arranged on one side of the color film substrate, which is away from the array substrate;

the lower polarizing plate is arranged on one side of the array substrate, which is away from the color film substrate, and is positioned between the array substrate and the backlight module.

9. The display device of claim 8, wherein the upper polarizing plate and the color film substrate are sealed and bonded by a sealant.

10. The display device of claim 8, wherein the lower polarizing plate is sealed and attached to the array substrate by a sealant.

Images