CN113219720A - Liquid crystal display and display device - Google Patents
Liquid crystal display and display device Download PDFInfo
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- CN113219720A CN113219720A CN202110456389.0A CN202110456389A CN113219720A CN 113219720 A CN113219720 A CN 113219720A CN 202110456389 A CN202110456389 A CN 202110456389A CN 113219720 A CN113219720 A CN 113219720A
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- crystal display
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
Abstract
The application discloses a liquid crystal display, includes: the liquid crystal display includes: the backlight module comprises a backlight module and a liquid crystal display panel; the backlight module includes: the backlight module comprises a light guide plate, a blue light source arranged on the light incident surface side of the light guide plate and an optical film arranged on the light emergent surface side of the light guide plate, wherein the light incident surface and the light emergent surface of the light guide plate are vertical to each other; the liquid crystal display panel includes: the backlight module comprises a first polarization unit, a liquid crystal box and a second polarization unit which are sequentially arranged along the light-emitting direction of the backlight module; the liquid crystal cell includes: the liquid crystal display device comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit, a filter layer and a second transparent substrate which are sequentially arranged along a light emergent direction; the filter layer includes: the yellow fluorescent powder layer, and a plurality of red light resistors, green light resistors and a third light resistor which are sequentially arranged, wherein the third light resistor is used for transmitting blue light; the color of light emitted into the liquid crystal display panel by the backlight module is uniform, and the optical effect of the liquid crystal display is improved. The application also discloses a display device with a better optical effect.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a liquid crystal display and a display device.
Background
Liquid crystal displays are widely used because of their advantages of low voltage, low power consumption, long life, no radiation, no pollution, etc.
The lcd generally includes a backlight module and an lcd panel disposed at a light-emitting side of the backlight module. The backlight module generally includes a white light source, a light guide plate and an optical film, and light emitted from the white light source passes through the light guide plate and the optical film and then enters the liquid crystal display panel. The color of the light emitted from the backlight module into the lcd panel is yellow and uneven, which results in poor optical quality of the lcd.
Disclosure of Invention
The present application provides a liquid crystal display and a display device, which aims to solve the problem of poor optical effect of the liquid crystal display due to the yellow and uneven color of the white light emitted into the liquid crystal display panel by the backlight module in the existing liquid crystal display.
In order to achieve the above object, the present application provides a liquid crystal display including: the backlight module comprises a backlight module and a liquid crystal display panel arranged on the light-emitting side of the backlight module;
the backlight module includes: the backlight module comprises a light guide plate, a blue light source arranged on the light incident surface side of the light guide plate and an optical film arranged on the light emergent surface side of the light guide plate, wherein the light incident surface and the light emergent surface of the light guide plate are vertical to each other;
the liquid crystal display panel includes: the first polarizing unit, the liquid crystal box and the second polarizing unit are sequentially arranged along the light-emitting direction of the backlight module;
the liquid crystal cell includes: the first transparent substrate, the semiconductor element layer, the liquid crystal unit, the filter layer and the second transparent substrate are sequentially arranged along the light emergent direction;
the filter layer includes: the fluorescent powder comprises a yellow fluorescent powder layer, and a plurality of red light resistors, green light resistors and a third light resistor which are sequentially arranged, wherein the third light resistor is used for transmitting blue light.
Optionally, the second polarization unit is a metal grating.
Optionally, the second polarization unit is a second polarizer.
Optionally, the second polarizer includes: the light-emitting device comprises a pressure-sensitive adhesive layer, a compensation film layer, a polarizing layer, a protective film layer and a surface treatment layer which are sequentially arranged along the light-emitting direction.
Optionally, the liquid crystal cell further includes: a first in-cell compensation film disposed between the semiconductor element layer and the liquid crystal cell, and a second in-cell compensation film disposed between the liquid crystal cell and the filter layer.
Optionally, the compensation film in the first cartridge comprises: the first A-plate compensation film and the first c-plate compensation film are arranged on the light incident side of the first A-plate compensation film.
Optionally, the second in-box compensation film includes: a second A-plate compensation film and a second c-plate compensation film arranged on the light-emitting side of the second A-plate compensation film.
Optionally, the third photoresist is a blue photoresist or a transparent photoresist;
the red light resistor and the green light resistor are arranged between the yellow fluorescent powder layer and the second transparent substrate;
the light emitting surfaces of the third light resistor, the red light resistor and the green light resistor are flush;
the light incident surface of the third light resistor is flush with the light incident surface of the yellow fluorescent powder layer.
Optionally, the third photoresist is a blue photoresist;
the red light resistor, the green light resistor and the third light resistor are arranged between the yellow fluorescent powder layer and the second transparent substrate.
In addition, in order to achieve the above object, the present application also proposes a display device including the liquid crystal display according to any one of the above.
This application technical scheme is through adopting a LCD, and LCD includes: the backlight module comprises a backlight module and a liquid crystal display panel arranged on the light-emitting side of the backlight module; the backlight module includes: the backlight module comprises a light guide plate, a blue light source arranged on the light incident surface side of the light guide plate and an optical film arranged on the light emergent surface side of the light guide plate, wherein the light incident surface and the light emergent surface of the light guide plate are vertical to each other; the liquid crystal display panel includes: the backlight module comprises a first polarization unit, a liquid crystal box and a second polarization unit which are sequentially arranged along the light-emitting direction of the backlight module; the liquid crystal cell includes: the liquid crystal display device comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit, a filter layer and a second transparent substrate which are sequentially arranged along a light emergent direction; the filter layer includes: the yellow fluorescent powder layer, and a plurality of red light resistors, green light resistors and a third light resistor which are sequentially arranged, wherein the third light resistor is used for transmitting blue light; therefore, the light guide plate has the same light absorption for the same color, and the optical film has the same light absorption for the same color, so that the color of the light emitted into the liquid crystal display panel by the backlight module is uniform, and the situations that the color of the light emitted by the backlight module is yellow and the color of the light emitted by the backlight module is not uniform due to different absorption of the light with different wavelengths by the light guide plate and different absorption of the light with different wavelengths by the optical film do not exist, so that the optical effect of the liquid crystal display is improved; in addition, because the filter layer for filtering the blue light to emit the red, green and blue primary color light is arranged in the liquid crystal box, a color filter does not need to be arranged independently, and the thickness of the liquid crystal display can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the structures shown in the drawings without any inventive work.
Fig. 1 is a schematic diagram illustrating an overall structure of a liquid crystal display according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a first detailed structure of an LCD according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a second detailed structure of an LCD according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a third detailed structure of an LCD according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a fourth detailed structure of an LCD according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a fifth exemplary embodiment of a liquid crystal display;
FIG. 7 is a schematic diagram of a sixth detailed structure of an LCD according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a seventh detailed structure of an LCD according to an embodiment of the present application;
FIG. 9 is a schematic diagram of an eighth detailed structure of an LCD according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a ninth refined structure of an LCD according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a tenth detailed structure of an LCD according to an embodiment of the present application;
fig. 12 is a schematic diagram of an eleventh refined structure of a liquid crystal display according to an embodiment of 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
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
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 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.
In an exemplary technique, a liquid crystal display generally includes a backlight module and a liquid crystal display panel disposed at a light-emitting side of the backlight module. The backlight module generally includes a white light source, a light guide plate and an optical film, and white light emitted from the white light source passes through the light guide plate and the optical film and then enters the liquid crystal display panel. The white light is mixed light, including light of multiple colors, the wavelengths of the light of different colors are different, and the transmittance of the materials of the light guide plate, the optical film and the like to the light of different wavelengths is different, and the energy absorption loss to the light of short wavelength is more serious than that to the light of long wavelength, therefore, after the white light emitted by the white light source passes through the light guide plate and the optical film, the loss of the light of short wavelength is larger, the color is yellowish, and the light emitted from the position far away from the white light source is more yellowish than the light emitted from the position near the white light source, and the light emitting color is uneven. The white light emitted into the liquid crystal display panel by the backlight module has yellow and uneven color, so that the liquid crystal display has poor optical effect. In order to solve the problem, the present embodiment provides a liquid crystal display, as shown in fig. 1, fig. 1 is a schematic structural diagram of the liquid crystal display provided in the present embodiment, and the liquid crystal display includes: a backlight module 10 and a liquid crystal display panel 20 disposed at the light-emitting side of the backlight module 10.
In this embodiment, the backlight module 10 includes: the backlight unit includes a light guide plate 11, a blue light source 12 disposed on a light incident surface side of the light guide plate 11, and an optical film 13 disposed on a light emitting surface side of the light guide plate 11. The light incident surface and the light emitting surface of the light guide plate 11 are perpendicular to each other, that is, in the present embodiment, the backlight module 10 is a side-in type backlight module.
It should be understood that the Light emitted by the blue Light source 12 is blue Light, and the blue Light source 12 can be any Light source capable of Emitting blue Light, such as a blue LED (Light Emitting Diode).
In this embodiment, the blue light emitted from the blue light source 12 enters from the light incident surface of the light guide plate 11, exits from the light exiting surface of the light guide plate 11, passes through the optical film 13, and enters the liquid crystal display panel 20, and an arrow inside the backlight module 10 in fig. 1 is a transmission direction of the blue light emitted from the blue light source 12 in the backlight module 10. That is, in fig. 1, the light incident surface of the light guide plate 11 is a side surface facing the blue light source 12, and the light exiting surface of the light guide plate 11 is a top surface of the light guide plate 11. Because the light that blue light source 12 sent is monochromatic light, monochromatic light is at light guide plate 11, when optical film 13 transmits, the loss is the same, can not exist because light guide plate 11 is different to the absorption loss of the light of different colours, optical film 13 leads to the uneven condition of near light end and far-end colour to the absorption loss difference of the light of different colours, consequently, the blue light that blue light source 12 sent passes through light guide plate 11 and optical film 13 after, the light colour of penetrating into liquid crystal display panel 20 is even, liquid crystal display's optical effect has been promoted.
In this embodiment, the optical film 13 may be a transparent film, or the optical film 13 may be a film capable of improving an optical effect, for example, a brightness enhancement film, a diffusion film, or the like.
In this embodiment, the liquid crystal display panel 20 includes: the backlight module 10 includes a first polarization unit 21, a liquid crystal cell 22, and a second polarization unit 23 sequentially arranged along a light emitting direction of the backlight module 10 (i.e., a direction indicated by an arrow between the backlight module 10 and the liquid crystal display panel 20 in fig. 1). That is, the light emitted from the backlight module 10 enters the liquid crystal display panel 20, passes through the first polarization unit 21, the liquid crystal cell 22, and the second polarization unit 23 in this order, and then exits the liquid crystal display panel 20.
In this embodiment, the first and second polarization units 21 and 23 are used to filter light beams vibrating in a specific direction, so that a user can see a picture displayed by the liquid crystal display.
In some embodiments, referring to fig. 2, the first polarization unit 21 may be a first metal grating, and the metal grating is used as the first polarization unit, so that the cost of the liquid crystal display may be reduced.
Since the light entering the first polarization unit 21 is all blue light, the metal grating of the first polarization unit 21 can be designed based on the blue light, so that the transmittance benefit is the greatest after the blue light passes through the metal grating. For example, the pitch a between the metal gratings of the first polarization unit 21 may be set to 200nm to 500nm, the metal line width b may be set to 0.3 to 0.8 of the pitch a (i.e., b ═ f × a, f is in the range of [0.3, 0.8]), and the thickness c of the metal gratings may be 20nm to 100 nm. The first polarization unit 21 adopts the metal grating designed for blue light, so that the polarization penetration benefit of the blue light is optimized, the penetration effect of the liquid crystal display is improved, the light leakage is reduced, and the optical brightness benefit is improved.
In some embodiments, referring to fig. 3, the first polarizing unit 21 may be a first polarizing plate including: the first protection film layer 211, the first polarizing layer 212, and the first compensation film layer 213 are sequentially disposed along the light emitting direction.
The first protective film layer 211 is used to support and protect the first polarizing layer 212. The first protective film layer 211 may be made of PET (Polyethylene terephthalate, thermoplastic polyester) or TAC (Triacetyl Cellulose).
The first polarizing layer 212 has the functions of absorption and penetration for polarized light, and can adjust light intensity filtering in cooperation with the driving of liquid crystal molecules. The first polarizing layer 212 may be made of PVA (polyvinyl alcohol).
The first compensation film layer 213 may be a material with birefringence extension, which has the function of activating the output of the compensated liquid crystal molecules with large-viewing angle polarized light and supports and protects the first polarizing layer 212 together with the first protection film layer 211.
In some embodiments, referring to fig. 4, the first polarizer may further include: a first surface treatment layer 214 disposed on the light incident side of the first protective film 211, and a first pressure sensitive adhesive layer 215 disposed on the light emergent side of the first compensation film layer 213. That is, the first polarizer may include: the first surface treatment layer 214, the first protection film layer 211, the first polarizing layer 212, the first compensation film layer 213 and the first pressure-sensitive adhesive layer 215 are sequentially arranged along the light extraction direction.
The first surface treatment layer 214 is a transparent film, and may have AG (anti-glare) or LR (Low reflection) functions.
The first pressure sensitive adhesive layer 215 is made of PSA (pressure sensitive adhesive) for adhering the first polarizer to the liquid crystal cell 22.
In some embodiments, referring to fig. 5, the second polarization unit 23 is a second metal grating. And the metal grating is used as the second polarization unit, so that the cost of the liquid crystal display can be reduced.
In some embodiments, the second polarizing unit 23 is a second polarizing plate, which includes: the second compensation film layer 233, the second polarizing layer 232, and the second protection film layer 231 are sequentially disposed along the light emitting direction.
The second compensation film 233 may be a material with birefringence extension, and may have a function of activating and compensating the large-viewing-angle polarized light output of the liquid crystal molecules, and support and protect the first polarizing layer 232 together with the second protection film 231.
The second polarizing layer 232 has the functions of absorption and penetration for polarized light, and can adjust light intensity for filtering light in cooperation with the driving of liquid crystal molecules. The second polarizing layer 212 may be made of PVA (polyvinyl alcohol).
The second protective film layer 231 serves to support and protect the second polarizing layer 232. The second protective film layer 231 may be made of PET (thermoplastic polyester) or TAC (Triacetyl Cellulose).
In some embodiments, referring to fig. 7, the second polarizer may further include: a second surface treatment layer 234 disposed on the light-emitting side of the second protection film 231, and a second pressure-sensitive adhesive layer 235 disposed on the light-emitting side of the second compensation film 233. That is, the second polarizer may include: the second pressure-sensitive adhesive layer 235, the second compensation film layer 233, the second polarizing layer 232, the second protection film layer 231 and the second surface treatment layer 234 are sequentially arranged along the light emergent direction.
The second surface treatment layer 234 is a transparent film, and may have AG (anti-glare) or LR (Low reflection) functions.
The second pressure sensitive adhesive layer 235 is made of PSA (pressure sensitive adhesive) for adhering the second polarizer to the liquid crystal cell 23.
It should be noted that, when the first polarization unit 21 is a first metal grating, the second polarization unit 23 may be a second metal grating or a second polarizer; when the first polarization unit 21 is a first polarizer, the second polarization unit 23 may be a second metal grating or a second polarizer.
In this embodiment, the liquid crystal cell 22 includes: the backlight module 10 comprises a first transparent substrate 221, a semiconductor element layer 222, a liquid crystal unit 223, a filter layer 224 and a second transparent substrate 225 which are arranged in sequence along the light emitting direction of the backlight module 10.
The first transparent substrate 221 and the second transparent substrate 225 are used for supporting and protecting the semiconductor device layer 222, the liquid crystal cell 223, and the filter layer 224. The first transparent substrate 221 and the second transparent substrate 225 are made of transparent materials, which may be Glass, PET (Polyethylene terephthalate), PI (Polyimide), and the like.
The semiconductor element layer 222 is provided between the first transparent substrate 221 and the liquid crystal layer 213, and drives the liquid crystal display.
The liquid crystal cell 223 is provided between the semiconductor element layer 222 and the second transparent substrate 225, and the thickness of each part of the liquid crystal cell 223 is uniform. Since the light incident on the liquid crystal cell 22 is blue light, the liquid crystal cell 223 having the same thickness at different portions is directly disposed without considering the difference in the refractive index of the liquid crystal cell with respect to light having different wavelengths. In the exemplary technique, in order to compensate for the difference in phase retardation caused by the difference in equivalent optical path difference due to the difference in equivalent refractive index of light with different wavelengths in the liquid crystal cell, the thicknesses of the portions corresponding to the red photoresist, the blue photoresist and the green photoresist in the liquid crystal cell are different, that is, the thicknesses of the portions of the liquid crystal cell are not the same in the exemplary technique, which increases the difficulty in manufacturing the liquid crystal cell and is likely to generate bubbles and cause light leakage. Therefore, compared with liquid crystal units with different thicknesses in the exemplary technology, the liquid crystal unit 223 in the embodiment is low in manufacturing difficulty, simple in process and not easy to generate bubbles, and can also avoid the light leakage phenomenon, so that the optical effect of the liquid crystal display is improved.
The filter layer 224 includes: a yellow phosphor layer 2241, and a plurality of red photoresist 2242, green photoresist 2243 and third photoresist 2244 arranged in sequence. Used for filtering light to emit red light, blue light and green light.
The yellow phosphor layer 2241 includes a yellow phosphor for converting blue light incident into the yellow phosphor layer 2241 into white light, that is, the light incident into the yellow phosphor layer 2241 is blue light, and the light exiting from the yellow phosphor layer is white light.
The red photoresist 2242 filters the red light and allows the red light to pass through.
The green photoresist 2243 filters green light.
The third photoresist 2244 is used to transmit blue light, that is, the light emitted from the third photoresist 2244 is blue light.
In some embodiments, the third photoresist 2244 may be a blue photoresist (to allow blue light to pass through) or a transparent photoresist (to allow light of any color to pass through). At this time, referring to fig. 8, the red photoresist 2242 and the green photoresist 2243 are disposed between the yellow phosphor layer 2241 and the second transparent substrate 225, the light emitting surfaces of the third photoresist 2244, the red photoresist 2242 and the green photoresist 2243 are flush, the light incident surface of the third photoresist 2244 is flush with the light incident surface of the yellow phosphor layer 2241, that is, the light incident side of the third photoresist 2244 is not disposed with the yellow phosphor layer 2241. Thus, the blue light emitted from the blue light source 12 passes through the light guide plate 11, the optical film 13, the first polarization unit 21, the first transparent substrate 221, the semiconductor device layer 222, and the liquid crystal unit 223 in sequence, and then enters the third photoresist 2244 and the yellow phosphor layer 2241, the blue light passes through the third photoresist 2244 and then emits blue light, the blue light enters the yellow phosphor layer 2241 and is excited by the yellow phosphor layer 2241 to become white light, the white light enters the red photoresist 2242 and the green photoresist 2243, and then the red light is filtered by the red photoresist 2242, and the green light is filtered by the green photoresist 2243 to emit green light. That is, the light incident on the red photoresist 2242 is white light, the light exiting from the red photoresist 2242 is red light, the light incident on the green photoresist 2243 is white light, and the light exiting from the green photoresist 2243 is green light; the light incident on the third photoresist 2244 is blue light, and the light exiting from the third photoresist 2244 is blue light. In this embodiment, the thickness relationship of the red photoresist 2242, the green photoresist 2243, the third photoresist 2244 and the yellow phosphor layer 2241 may be: the thickness of the third photoresist 2244 is equal to the thickness of the red photoresist 2242 + the thickness of the yellow phosphor layer 2241 is equal to the thickness of the green photoresist 2243 + the thickness of the yellow phosphor layer 2241.
In some embodiments, the third photoresist 2244 may be a blue photoresist. At this time, referring to fig. 9, the red photoresist 2242, the green photoresist 2243 and the third photoresist 2244 are disposed between the yellow phosphor layer 2241 and the second transparent substrate 225, that is, the red photoresist 2242, the green photoresist 2243 and the third photoresist 2244 are disposed on the light emitting side of the yellow phosphor layer 2241, and the yellow phosphor layer 2241 is also disposed on the light incident side of the third photoresist 2244. Thus, the blue light emitted from the blue light source 12 passes through the light guide plate 11, the optical film 13, the first polarization unit 21, the first transparent substrate 221, the semiconductor device layer 222, and the liquid crystal unit 223 in sequence, and then enters the yellow phosphor layer 2241, and is excited by the yellow phosphor layer 2241 to become white light, which enters the red photoresist 2242, the green photoresist 2243, and the third photoresist 2244, respectively, so as to filter the red light through the red photoresist 2242, filter the green light through the green photoresist 2243, and filter the third photoresist 2244 to become blue light. That is, the light incident on the red photoresist 2242 is white light, the light exiting from the red photoresist 2242 is red light, the light incident on the green photoresist 2243 is white light, and the light exiting from the green photoresist 2243 is green light; the light incident on the third photoresist 2244 is white light, and the light emitted from the third photoresist 2244 is blue light. In this embodiment, the thickness relationship of the red photoresist 2242, the green photoresist 2243 and the third photoresist 2244 may be as follows: the thickness of the third photoresist 2244 is equal to the thickness of the red photoresist 2242 and the thickness of the green photoresist 2243.
In this embodiment, referring to fig. 8 and 9, the color optical film 24 may further include: the light blocking wall 2445 and the light blocking wall 2445 are disposed between the red photoresist 2242, the green photoresist 2243 and the third photoresist 2244, and are used for isolating the red photoresist 2242, the green photoresist 2243 and the third photoresist 2244 to avoid crosstalk. The light blocking walls 2445 are made of a non-light transmissive material, for example, the light blocking walls 2445 may be black. When the light incident side of the third photoresist 2244 is not provided with the yellow phosphor layer 2241, as shown in fig. 8, the thickness of the light blocking wall 2445 may be: the thickness of the light blocking wall 2445 is equal to the thickness of the third photoresist 2244, which is equal to the thickness of the red photoresist 2242 + the thickness of the yellow phosphor layer 2241, which is equal to the thickness of the green photoresist 2243 + the thickness of the yellow phosphor layer 2241. When the yellow phosphor layer 2241 is disposed on the light incident side of the third photoresist 2244, as shown in fig. 9, the thickness of the light-blocking wall 2445 may be: the thickness of the light blocking wall 2445 is equal to the thickness of the third photoresist 2244 is equal to the thickness of the red photoresist 2242 is equal to the thickness of the green photoresist 2243.
The present embodiment provides a liquid crystal display, including: the backlight module comprises a backlight module and a liquid crystal display panel arranged on the light-emitting side of the backlight module; the backlight module includes: the backlight module comprises a light guide plate, a blue light source arranged on the light incident surface side of the light guide plate and an optical film arranged on the light emergent surface side of the light guide plate, wherein the light incident surface and the light emergent surface of the light guide plate are vertical to each other; the liquid crystal display panel includes: the backlight module comprises a first polarization unit, a liquid crystal box and a second polarization unit which are sequentially arranged along the light-emitting direction of the backlight module; the liquid crystal cell includes: the liquid crystal display device comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit, a filter layer and a second transparent substrate which are sequentially arranged along a light emergent direction; the filter layer includes: the yellow fluorescent powder layer, and a plurality of red light resistors, green light resistors and a third light resistor which are sequentially arranged, wherein the third light resistor is used for transmitting blue light; therefore, the light guide plate has the same light absorption for the same color, and the optical film has the same light absorption for the same color, so that the color of the light emitted into the liquid crystal display panel by the backlight module is uniform, and the situations that the color of the light emitted by the backlight module is yellow and the color of the light emitted by the backlight module is not uniform due to different absorption of the light with different wavelengths by the light guide plate and different absorption of the light with different wavelengths by the optical film do not exist, so that the optical effect of the liquid crystal display is improved; in addition, because the filter layer for filtering the blue light to emit the red, green and blue primary color light is arranged in the liquid crystal box, a color filter does not need to be arranged independently, and the thickness of the liquid crystal display can be reduced.
Based on the foregoing embodiments, a liquid crystal display of the present application is proposed. In this embodiment, see fig. 10 for an illustration: the liquid crystal cell 22 may also include: a first in-cell compensation film 226 provided between the semiconductor element layer 222 and the liquid crystal cell 223, and a second in-cell compensation film 227 provided between the liquid crystal cell 223 and the filter layer 224.
Since the light entering the liquid crystal cell 22 is blue light and the light exiting the liquid crystal cell 22 is blue light, the compensation film 226 in the first cell and the compensation film 227 in the second cell can be designed for the blue light. In order to make the compensation film 226 in the first box and the compensation film 227 in the second box better compensate the blue light, the planar phase difference value of the compensation film 226 in the first box can be 35nm to 60nm, and the vertical (thickness direction, i.e. light emitting direction) phase difference value can be 119nm to 150nm, wherein nm is nanometer; for example, the planar phase difference value of the compensation film 226 in the first cassette may be 35nm, 45nm, 60nm, etc., and the vertical phase difference value may be 119nm, 130nm, 150nm, etc. The planar phase difference value of the compensation film 227 in the second box can be 35nm to 60nm, and the vertical phase difference value can be 119nm to 150nm, for example, the planar phase difference value of the compensation film 227 in the second box can be 35nm, 50nm, 60nm, etc., and the vertical phase difference value can be 119nm, 140nm, 150nm, etc. Because the compensation film 226 in the first box and the compensation film 227 in the second box are designed for blue light, the blue light can be better compensated, so that the light emitted into the pixel layer is sufficient, and light leakage can be avoided.
In some embodiments, the compensation film 226 in the first box may be composed of a first a-plate compensation film 2261 and a first c-plate compensation film 2262, wherein the first c-plate compensation film 2262 is disposed on the light incident side of the first a-plate compensation film 2261, that is, the first a-plate compensation film 2261 overlaps the light emitting side of the first c-plate compensation film 2262.
In some embodiments, the second in-cell compensation film 227 may be composed of a second A-plate compensation film 2271 and a second c-plate compensation film 2272, wherein the second c-plate compensation film 2272 is disposed on the light-emitting side of the second A-plate compensation film 2271, that is, the second c-plate compensation film 2272 is overlapped on the light-emitting side of the second A-plate compensation film 2271.
For the first and second a-plate 2261 and 2272 compensation films, which are made of a-plate optical material, the a-plate optical material may be nematic (nematic) liquid crystal molecular material or single-axis material, the liquid crystal molecular material is anisotropic, ne (equivalent refractive index with optical axis parallel to electric field) and no (equivalent refractive index with optical axis perpendicular to electric field), wherein the ne axis of the a-plate compensation film is parallel to the light-emitting plane, and may be selected from ne ═ nx > no ny or ne ═ ny > nx according to different light-emitting electric field directions, where nx and ny are planes on which the light-emitting plane (i.e. the plane on which the films are located), and the refractive indices in two mutually perpendicular directions (i.e. the x direction and the y direction are both located on the plane on which the films are located, and the x direction and the y direction are perpendicular to each other), the refractive index in the film thickness direction (i.e., the z direction, perpendicular to the light exit surface, i.e., the z direction is perpendicular to the plane of the film) is nz ═ no.
The first C-plate 2262 and the second C-plate 2272 are made of a C-plate optical material, which may be a disk-shaped molecular material having the same anisotropy and having ne and no, where no is nx is ny of the disk-shaped material, where nx and ny are refractive indexes in two directions perpendicular to each other on a plane where the light emitting surface (i.e., a plane where the film is located) is located, and a refractive index in a film thickness direction (perpendicular to the light emitting surface) is nz is ne. Wherein ne < no for the negative c-plate optical material.
In one example, the first A-plate 2261 is made of a uniaxial A-plate optical material, the first C-plate 2262 is made of a negative-type C-plate optical material, ne of the uniaxial A-plate optical material may be 1.0-2.5, and no of the negative-type C-plate material may be 1.0-2.5.
In one example, the second A-plate is made of 2271 single-axis A-plate optical material, the second C-plate 2272 is made of negative C-plate optical material, ne of the single-axis A-plate optical material may be 1.0-2.5, and no of the negative C-plate material may be 1.0-2.5.
In this embodiment, referring to fig. 11, when the first polarization unit 21 is a first polarizer and the compensation film 226 and the compensation film 227 are disposed in the liquid crystal cell 22, the first compensation film layer 213 may be designed to have a planar phase difference value of 0 and a vertical phase difference value of 0 (i.e., a zero phase compensation film).
Referring to fig. 12, when the second polarization unit 23 is a second polarizer, and the compensation film 226 and the compensation film 227 are disposed in the liquid crystal cell 22, the second compensation film layer 233 may be designed to have a planar phase difference of 0 and a vertical phase difference of 0 (i.e., a zero phase compensation film).
In the liquid crystal display provided by the embodiment, the liquid crystal box further comprises a first box internal compensation film arranged between the semiconductor element layer and the liquid crystal unit and a second box internal compensation film arranged between the liquid crystal unit and the filter layer, and the first box internal compensation film and the second box internal compensation film are designed for blue light, so that the blue light can be better compensated, the light entering the pixel layer is sufficient, and the light leakage can be avoided.
Based on the foregoing embodiments, a display device of the present application is provided, and the display device includes the liquid crystal display described in any of the foregoing embodiments.
The display device may be any display device including the aforementioned liquid crystal display. For example, the display device may be a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), a handheld device, a vehicle-mounted device, a wearable device, a computing device, a television, a refrigerator, an air conditioner, and the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
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 liquid crystal display, comprising: the backlight module comprises a backlight module and a liquid crystal display panel arranged on the light-emitting side of the backlight module;
the backlight module includes: the backlight module comprises a light guide plate, a blue light source arranged on the light incident surface side of the light guide plate and an optical film arranged on the light emergent surface side of the light guide plate, wherein the light incident surface and the light emergent surface of the light guide plate are vertical to each other;
the liquid crystal display panel includes: the first polarizing unit, the liquid crystal box and the second polarizing unit are sequentially arranged along the light-emitting direction of the backlight module;
the liquid crystal cell includes: the first transparent substrate, the semiconductor element layer, the liquid crystal unit, the filter layer and the second transparent substrate are sequentially arranged along the light emergent direction;
the filter layer includes: the fluorescent powder comprises a yellow fluorescent powder layer, and a plurality of red light resistors, green light resistors and a third light resistor which are sequentially arranged, wherein the third light resistor is used for transmitting blue light.
2. The liquid crystal display of claim 1, wherein the second polarizing unit is a metal grating.
3. The liquid crystal display of claim 1, wherein the second polarizing unit is a second polarizer.
4. The liquid crystal display of claim 3, wherein the second polarizer comprises: the light-emitting device comprises a pressure-sensitive adhesive layer, a compensation film layer, a polarizing layer, a protective film layer and a surface treatment layer which are sequentially arranged along the light-emitting direction.
5. The liquid crystal display of claim 1, wherein the liquid crystal cell further comprises: a first in-cell compensation film disposed between the semiconductor element layer and the liquid crystal cell, and a second in-cell compensation film disposed between the liquid crystal cell and the filter layer.
6. The liquid crystal display of claim 4, wherein the compensation film in the first cell comprises: the first A-plate compensation film and the first c-plate compensation film are arranged on the light incident side of the first A-plate compensation film.
7. The liquid crystal display of claim 4, wherein the second in-cell compensation film comprises: a second A-plate compensation film and a second c-plate compensation film arranged on the light-emitting side of the second A-plate compensation film.
8. The liquid crystal display according to any one of claims 1 to 7, wherein the third photoresist is a blue photoresist or a transparent photoresist;
the red light resistor and the green light resistor are arranged between the yellow fluorescent powder layer and the second transparent substrate;
the light emitting surfaces of the third light resistor, the red light resistor and the green light resistor are flush;
the light incident surface of the third light resistor is flush with the light incident surface of the yellow fluorescent powder layer.
9. The liquid crystal display according to any one of claims 1 to 7, wherein the third resist is a blue resist;
the red light resistor, the green light resistor and the third light resistor are arranged between the yellow fluorescent powder layer and the second transparent substrate.
10. A display device, characterized in that the display device comprises a liquid crystal display according to any one of claims 1 to 9.
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| CN202110456389.0A CN113219720A (en) | 2021-04-26 | 2021-04-26 | Liquid crystal display and display device |
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| CN202110456389.0A CN113219720A (en) | 2021-04-26 | 2021-04-26 | Liquid crystal display and display device |
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