CN113219725A - Display device and display terminal - Google Patents
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- CN113219725A CN113219725A CN202110456403.7A CN202110456403A CN113219725A CN 113219725 A CN113219725 A CN 113219725A CN 202110456403 A CN202110456403 A CN 202110456403A CN 113219725 A CN113219725 A CN 113219725A
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- 239000002096 quantum dot Substances 0.000 claims abstract description 54
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims description 66
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical class [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 37
- 239000012788 optical film Substances 0.000 claims description 32
- 229920002120 photoresistant polymer Polymers 0.000 claims description 24
- 230000013011 mating Effects 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 7
- 210000002858 crystal cell Anatomy 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 108010043121 Green Fluorescent Proteins Proteins 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004383 yellowing Methods 0.000 description 4
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- 239000002184 metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application discloses display device and display terminal belongs to the liquid crystal display equipment field. The display device includes: the side-in type backlight module is provided with a blue light source; and the display panel is arranged on the light emergent side of the side-in type backlight module, a quantum dot optical diaphragm is arranged in the display panel, the quantum dot optical diaphragm is arranged in the display panel, and the quantum dot optical diaphragm comprises a red fluorescent powder quantum dot and a green fluorescent powder quantum dot. The display device provided by the application can improve the phenomenon of color nonuniformity of the display panel at the low-beam side and the high-beam side.
Description
Technical Field
The present disclosure relates to the field of liquid crystal display devices, and particularly to a display device and a display terminal.
Background
In the related art, a display device with a lateral backlight module has a lateral light source, the lateral light source generates white light through a blue LED coated with yellow phosphor, and then the white light enters a display panel from the lower part of the display panel of the display device after passing through a light guide plate and an optical film of the lateral backlight module.
However, color unevenness occurs on the light incident side and the far light side of the display panel.
Disclosure of Invention
The main purpose of the present application is to provide a display device and a display terminal, which aim to solve the technical problem of uneven color of the incident side and the far side of the display panel in the prior art.
To achieve the above object, the present application provides a display device including:
the side-in type backlight module is provided with a blue light source; and
the display panel is arranged on the light emitting side of the side-in type backlight module, a quantum dot optical diaphragm is arranged in the display panel, the quantum dot optical diaphragm is arranged in the display panel, and the quantum dot optical diaphragm comprises a red fluorescent powder quantum dot and a green fluorescent powder quantum dot.
Optionally, the quantum dot optical film further includes:
the surface of the transparent substrate is provided with red phosphor quantum dots and green phosphor quantum dots;
the red phosphor quantum dot is arranged corresponding to a red sub-pixel in a liquid crystal box of the display panel, and the green phosphor quantum dot is arranged corresponding to a green sub-pixel in the liquid crystal box.
Optionally, the surface of the transparent substrate has a plurality of transmissive regions corresponding to the blue sub-pixels of the liquid crystal cell, and a transparent photoresist is embedded in each transmissive region.
Optionally, the transparent substrate is made of any one of polyimide, polyethylene terephthalate, or glass.
Optionally, the display panel includes:
the first substrate and the second substrate are oppositely arranged, the first substrate is arranged close to the side-in type backlight module, and the second substrate is arranged on one side of the first substrate, which is far away from the side-in type backlight module;
the first substrate is provided with a first matching surface facing the lateral backlight module; the second substrate has a second mating surface adjacent to the first substrate.
Optionally, the quantum dot optical film is disposed on the first mating surface.
Optionally, the display panel further includes a first polarizing plate disposed on the first mating surface;
the quantum dot optical film is arranged on the surface of one side, far away from the first substrate, of the first polarizing plate.
Optionally, the quantum dot optical film is disposed on a side of the first substrate away from the lateral backlight module;
the display device further includes:
the first transparent light resistance layer is arranged on the surface of one side, far away from the first substrate, of the quantum dot optical membrane.
Optionally, the quantum dot optical film is arranged on the second matching surface;
the display device further includes:
and the second transparent photoresist layer is arranged on the surface of one side of the quantum dot optical membrane far away from the second substrate.
In a second aspect, the present application further provides a display terminal including the above display device.
This application technical scheme establishes to single blue light through the light that sends the light source with side income formula backlight unit for the homogeneous blue light of colour is all reflected out to the low beam side that is close to the sidelight source on the light guide plate and the distance light side of keeping away from the sidelight source, then red light phosphor powder quantum dot and green light phosphor powder quantum dot through the red light phosphor powder quantum dot in the quantum dot optical film piece in the display panel produce ruddiness and green glow, with the various colours of combined display in the display panel, thereby improve among the correlation technique when side income formula backlight unit uses the white light, the inhomogeneous etiolation phenomenon of colour of the low beam side of display panel and distance light side, and then improve display panel's display effect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another embodiment of a display device according to the present application;
FIG. 3 is a schematic structural diagram of another embodiment of a display device according to the present application;
FIG. 4 is a schematic structural diagram of a display device according to yet another embodiment of the present application;
fig. 5 is a schematic structural diagram of a quantum dot optical film of a display device according to the present application.
The reference numbers illustrate:
the implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Display devices such as liquid crystal displays are generally composed of two parts, one of which is a side-in type backlight module and a liquid crystal display panel located above the side-in type backlight module. The commonly used LED light source is a blue light chip coated with yellow phosphor, and the light emitted from the blue-green chip passes through the yellow phosphor to generate white light. However, the light incident side and the far light side of the display panel have non-uniform yellowing phenomena, that is, the light emitting color of the backlight at the far light side is obviously yellowish compared with the light emitting color of the backlight at the light incident side. The reason for yellowing is that optical materials such as ink on the light guide plate and optical films on the light guide plate have optical properties with high light transmittance when light passes through the light guide plate in the light transmission process, but the optical materials do not have optical properties that all visible light bands (380-780 nm) can have high light transmittance, especially, the energy absorption loss of short wavelengths is obviously serious compared with long wavelengths, so that the energy loss of short wavelengths of a far light side of white light after the white light is transmitted through an optical medium is serious, and the color of backlight light emitted from the light incident side is obviously yellowish, so that the colors of the light incident side and the far light side of the display panel are obviously uneven. Along with the development of the size of the display to the large size, the color shift problem of the side-in type LED backlight module is more serious, and the development of the thin side-in type module product is severely limited.
For this reason, this application technical scheme establishes the light that the light source that will incline income formula backlight unit sends into single blue light, compares in the white light including full visible light, and the blue light all reflects the even blue light of colour through the passing light side that the light guide plate is back to the side light source and the far-reaching beam side of keeping away from the side light source to can avoid display panel's passing light side and far-reaching beam side to appear inhomogeneous yellow phenomenon.
The application concept of the embodiments of the present application will be further described with reference to some specific embodiments.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a display device according to an embodiment of the present disclosure, which includes a side-in type backlight module 100 and a display panel 200.
The side-in backlight module 100 has a blue light source.
The edge-type backlight module 100 generally uses a blue LED coated with yellow phosphor to emit white light. In this embodiment, the lateral backlight module 100 emits a single blue light, i.e., the surface of the blue LED may not be coated with yellow phosphor, so that the lateral backlight module 100 can directly emit the blue light.
The edge-type backlight module 100 generally includes a light guide plate 120, an edge light source 110, i.e., a blue LED without yellow phosphor, disposed on the light incident side of the light guide plate 120, and an optical film disposed on the light emitting side of the light guide plate 120. In the present embodiment, the blue light enters the light guide plate 120, and the wavelengths thereof are consistent, so that the blue light with uniform color is reflected by both the low-beam side close to the side light sources 110 and the high-beam side far from the side light sources 110 on the light guide plate 120.
The display panel 200 is disposed on the light-emitting side of the edge-in backlight module 100, a quantum dot optical film 300 is disposed in the display panel 200, and the quantum dot optical film 300 includes red phosphor quantum dots 320 and green phosphor quantum dots 330. The red phosphor quantum dots 320 are irradiated by the blue light source to generate red light, and the green phosphor quantum dots 330 are irradiated by the blue light source to generate green light.
In this embodiment, the blue light emitted by the blue light source of the side-in backlight module 100 is also the blue light with uniform color when coming out from the side-in backlight module 100, and the blue light excites the red phosphor quantum dots 320(R) and the green phosphor quantum dots 330(G) on the quantum dot optical film 300 in the display panel 200 when entering the display panel, so as to respectively generate the red light and the green light with uniform high color vividness. The red light, the green light and the blue light are modulated by the brightness of the display panel 200 to generate R, G, B brightness signals with different colors for color mixing display, thereby generating a high color vividness image quality. In this embodiment, the light emitted from the light source of the side-entry backlight module is set as a single blue light, and compared with the white light including the full visible light, after the blue light passes through the light guide plate, the blue light with uniform color is still reflected by the display panel close to the low beam side of the side light source and the high beam side far away from the side light source, so that the uneven yellowing phenomenon on the low beam side and the high beam side of the display panel can be avoided. The uneven yellowing phenomenon of the display panel 200 is improved, the display panel 200 can be developed to a large size, and the development of a thin lateral-entering module product is facilitated.
In one embodiment, the quantum dot optical film 300 includes a transparent substrate 310, and red phosphor quantum dots 320 and green phosphor quantum dots 330 are disposed on a surface of the transparent substrate 310.
Specifically, the transparent base material 310 may be a thin film transparent base material such as PI (polyimide), PET (polyethylene terephthalate), or a glass substrate, or the like.
The liquid crystal box comprises a red sub-pixel array, a green sub-pixel array and a blue sub-pixel array. The red phosphor quantum dots 320 and the green phosphor quantum dots 330 are respectively disposed corresponding to the red sub-pixels and the green sub-pixels of the liquid crystal cell. So that the blue light excites the red phosphor quantum dots 320 and the green phosphor quantum dots 330 of the R sub-pixels and the G sub-pixels on the display panel 200 to become bright red light and green light. The red, green, and blue light then pass through the transparent substrate 310 and enter the inside of the display panel 200.
As an option of this embodiment, referring to fig. 5, the surface of the transparent substrate 310 has a plurality of transmissive regions corresponding to the blue sub-pixels of the display panel 200, and a transparent photoresist 340 is embedded in each transmissive region. That is, the blue light can also penetrate through the transparent photoresist 340 into the display panel 200. At this time, since the transparent photoresist 340 has better photosensitivity and higher transmittance, the quality of blue light can be further improved.
As will be readily understood, the display panel includes: the backlight module comprises a first substrate 210 and a second substrate 260 which are arranged oppositely, wherein the first substrate 210 is arranged close to the side-in backlight module 100, and the second substrate 260 is arranged on one side of the first substrate 210 far away from the side-in backlight module 100;
the first substrate 210 has a first mating surface facing the edge-type backlight module 100; the second substrate 260 has a second mating surface adjacent to the first substrate 210.
The liquid crystal panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and a driving voltage is applied to the two glass substrates to control the rotation direction of the liquid crystal molecules so as to refract light rays of the backlight module out to generate a picture. The lcd panel generally includes a liquid crystal cell 240, an upper polarizer 270, a lower polarizer 220, an upper substrate, a lower substrate, a protective film 280 disposed outside the upper polarizer 270, and the like. The backlight module is located at the inner side, the polarizer near the backlight module is referred to as a lower polarizer 220, and the polarizer closer to the outer side is referred to as an upper polarizer 270. Similarly, the substrate on the inner side is called the lower substrate, and the substrate on the outer side is called the upper substrate. The specific internal structure of the display panel 200 is the prior art and will not be described herein.
Therefore, in the present embodiment, the first substrate 210 is a lower substrate, and the second substrate 260 is an upper substrate. The light coming out from the light exit side of the light guide plate 120 passes through the optical film on the light guide plate 120 and then sequentially passes through the lower polarizer 220 and the first substrate 210 to enter the liquid crystal cell 240.
In one embodiment, the quantum dot optical film 300 is disposed on the first mating surface.
Referring to fig. 1, in the embodiment, the quantum dot optical film 300 is attached to the first mating surface, and the lower polarizer 220 is disposed on the surface of the quantum dot optical film 300.
Alternatively, in another embodiment, referring to fig. 2, the display panel further includes a first polarizer disposed on the first mating surface. The quantum dot optical film is arranged on the surface of one side, far away from the first substrate, of the first polarizing plate.
Specifically, the first polarizer is the lower polarizer 220, and at this time, the quantum dot optical film 300 is disposed on the surface of the first polarizer.
Alternatively, in another embodiment, referring to fig. 3, the display device further includes a first transparent photoresist layer 230, and the first transparent photoresist layer 230 is disposed on a side surface of the quantum dot optical film 300 away from the first substrate 210. The quantum dot optical film 300 is disposed on a side of the first substrate 210 away from the edge-type backlight module 100.
Referring to fig. 3, in the present embodiment, the quantum dot optical film 300 is disposed inside the display panel 200 and on the semiconductor device and the metal wiring layer 211 on the first substrate 210. At this time, a portion of the transparent substrate 310 of the quantum dot optical film 300 is directly attached to the glass substrate, and another portion is attached to the semiconductor device and the metal wiring layer 211 on the glass substrate. The red phosphor quantum dots 320 and the green phosphor quantum dots 330 are disposed corresponding to the R sub-pixels and the G sub-pixels in the display panel 200. And a transparent photoresist layer, i.e. the first transparent photoresist layer 230, is covered on the surfaces of the red phosphor quantum dots 320 and the green phosphor quantum dots 330. The flatness of the transparent photoresist layer is maintained to facilitate uniform distribution of liquid crystal molecules on the first transparent photoresist layer 230. The first transparent photoresist layer 230 can isolate the influence of the moisture of the liquid crystal molecules on the red phosphor quantum dots 320 and the green phosphor quantum dots 330, and reduce the failure rate of the display panel 200.
Alternatively, in another embodiment, referring to fig. 4, the display panel 200 further includes a second transparent photoresist layer 290. Wherein the quantum dot optical film 300 is disposed on the second mating surface. The second transparent photoresist layer 290 is disposed on a surface of the quantum dot optical film 300 away from the second substrate 260.
It is understood that the inner side of the upper substrate is generally fabricated with the color photoresist 250, i.e. the inner surface of the upper substrate is coated with the R photoresist, the G photoresist and the B photoresist. In the present embodiment, since the uniform blue light enters the liquid crystal cell, the quantum dot optical film 300 can replace the R photoresist, the G photoresist, and the B photoresist, thereby simplifying the internal structure of the liquid crystal display panel 200, reducing the manufacturing process, and further reducing the cost.
At this time, the second transparent photoresist layer 290, similar to the first transparent photoresist layer 230, is also used to isolate the influence of the moisture of the liquid crystal molecules on the red phosphor quantum dots 320 and the green phosphor quantum dots 330, and reduce the failure rate of the display panel 200.
The present application further provides a display terminal, which includes the display device described above, and the specific structure of the display device refers to the foregoing embodiments, and since the display terminal adopts all technical solutions of all the foregoing embodiments, the display terminal at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated herein.
The display terminal may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, a television, or a vehicle-mounted terminal.
The above description is only an alternative embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which are made by the following claims and their equivalents, or which are directly or indirectly applicable to other related arts, are intended to be included within the scope of the present application.
Claims (10)
1. A display device, comprising:
the side-in type backlight module is provided with a blue light source; and
the display panel is arranged on the light emitting side of the side-in type backlight module, a quantum dot optical diaphragm is arranged in the display panel, the quantum dot optical diaphragm is arranged in the display panel, and the quantum dot optical diaphragm comprises a red light fluorescent powder quantum dot and a green light fluorescent powder quantum dot.
2. The display device of claim 1, wherein the quantum dot optical film further comprises:
the surface of the transparent substrate is provided with the red phosphor quantum dots and the green phosphor quantum dots;
the red phosphor quantum dot is arranged corresponding to a red sub-pixel in a liquid crystal box of the display panel, and the green phosphor quantum dot is arranged corresponding to a green sub-pixel of the liquid crystal box.
3. The display device according to claim 2, wherein the surface of the transparent substrate has a plurality of transmissive regions corresponding to the blue sub-pixels of the liquid crystal cell, and a transparent photoresist is embedded in each of the transmissive regions.
4. The display device according to claim 2, wherein the transparent substrate is made of any one of polyimide, polyethylene terephthalate, and glass.
5. The display device according to any one of claims 2 to 4, wherein the display panel includes:
the first substrate and the second substrate are arranged oppositely, the first substrate is arranged close to the side-in type backlight module, and the second substrate is arranged on one side of the first substrate, which is far away from the side-in type backlight module;
the first substrate is provided with a first matching surface facing the lateral backlight module; the second substrate is provided with a second matching surface close to the first substrate.
6. The display device according to claim 5, wherein the quantum dot optical film is disposed on the first mating surface.
7. The display device according to claim 5, wherein the display panel further comprises a first polarizing plate disposed on the first mating face;
the quantum dot optical film is arranged on the surface of one side, far away from the first substrate, of the first polarizing plate.
8. The display device according to claim 5, wherein the quantum dot optical film is disposed on a side of the first substrate away from the side-in backlight module;
the display device further includes:
the first transparent light resistance layer is arranged on the surface of one side, far away from the first substrate, of the quantum dot optical membrane.
9. The display device according to claim 5, wherein the quantum dot optical film is disposed on the second mating surface;
the display device further includes:
and the second transparent light resistance layer is arranged on the surface of one side of the quantum dot optical membrane, which is far away from the second substrate.
10. A display terminal characterized by comprising a display device according to any one of claims 1 to 9.
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| CN202110456403.7A CN113219725A (en) | 2021-04-26 | 2021-04-26 | Display device and display terminal |
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| CN202110456403.7A CN113219725A (en) | 2021-04-26 | 2021-04-26 | Display device and display terminal |
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