CN113219724A

CN113219724A - Liquid crystal display and display device

Info

Publication number: CN113219724A
Application number: CN202110456399.4A
Authority: CN
Inventors: 康志聪; 李伟
Original assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-08-06

Abstract

The application discloses a liquid crystal display, includes: backlight unit and liquid crystal display panel, backlight unit 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; the liquid crystal display panel includes: the first polarizing unit, the liquid crystal box, the second polarizing unit and the color optical film are sequentially arranged along the light-emitting direction of the backlight module, blue light emitted by the blue light source is incident from the light-incident surface of the light guide plate and is emitted from the light-emitting surface of the light guide plate, and the blue light passes through the optical film and then is incident into the liquid crystal display panel, so that the color of light incident 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

Liquid crystal display and display device

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 yellow and uneven color of white light emitted into a liquid crystal display panel by a 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, the second polarizing unit and the color optical film are sequentially arranged along the light-emitting direction of the backlight module;

the liquid crystal cell includes: the liquid crystal display panel comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit and a second transparent substrate which are sequentially arranged along a light emergent direction;

the color optical film includes: a first transparent film; a second transparent film disposed on a light exit side of the first transparent film; the fluorescent film comprises a first transparent film, a second transparent film, a yellow fluorescent powder layer, a plurality of red light resistors, a plurality of green light resistors and a third light resistor, wherein the yellow fluorescent powder layer is arranged between the first transparent film and the second transparent film, and the third light resistor is used for transmitting blue light.

Optionally, the first polarization unit is a metal grating.

Optionally, the first polarization unit includes: the first protection film layer, the first polarizing layer and the first compensation film layer are sequentially arranged along the light emergent direction;

the second polarization unit includes: the second compensation film layer, the second polarizing layer and the second protection film layer are sequentially arranged along the light emergent direction.

Optionally, the planar phase difference value of the first compensation film layer is 35nm to 60nm, and the vertical phase difference value is 119nm to 150 nm;

the planar phase difference value of the second compensation film layer is 35-60 nanometers, and the vertical phase difference value is 119-150 nanometers.

Optionally, the liquid crystal cell further includes:

a first in-cell compensation film provided 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 second transparent substrate.

Optionally, the planar phase difference value of the compensation film in the first box is 35nm to 60nm, and the vertical phase difference value is 119nm to 150 nm; the planar phase difference value of the compensation film in the second box is 35-60 nanometers, and the vertical phase difference value is 119-150 nanometers.

Optionally, the planar phase difference value of the first compensation film layer is 0, and the vertical phase difference value is 0;

the planar phase difference value of the second compensation film layer is 0, and the vertical phase difference value is 0.

Optionally, the third photoresist is a blue photoresist or a transparent photoresist;

the third photoresist is adjacent to the first transparent film and the second transparent film;

the red light resistor and the green light resistor are arranged between the yellow fluorescent powder layer and the second transparent film.

Optionally, the third photoresist is a blue photoresist;

the red light resistor, the green light resistor and the third light resistor are arranged on the light emitting side of the yellow fluorescent powder layer.

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: backlight unit and set up the liquid crystal display panel in backlight unit light-emitting side, wherein, backlight unit 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 polarizing unit, a liquid crystal box, a second polarizing unit and a color optical film which are sequentially arranged along the light emitting direction of the backlight module; the liquid crystal cell includes: the liquid crystal display panel comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit and a second transparent substrate which are sequentially arranged along a light emergent direction; the color optical film includes: a first transparent film; a second transparent film disposed on a light exit side of the first transparent film; the yellow fluorescent powder layer is arranged between the first transparent film and the second transparent film, and the red light resistors, the green light resistors and the third light resistors are sequentially arranged, and the third light resistors are used for transmitting blue light. Thus, the blue light emitted by the blue light source enters from the light incident surface of the light guide plate, exits from the light emergent surface of the light guide plate, and enters the liquid crystal display panel after passing through the optical film, because the light emitted by the blue light source is blue light, the light absorption of the light guide plate to the same color is the same, and the light absorption of the optical film to the same color is the same, therefore, the color of the light emitted by the backlight module to the liquid crystal display panel is uniform, the condition that the light color of the backlight module is yellowish, the part far away from the light source is not uniform with the part near the light source due to the different light absorption of the light guide plate to different wavelengths and the different light absorption of the optical film to different wavelengths does not exist, the optical effect of the liquid crystal display is improved, meanwhile, the blue light passes through the first polarization unit, the liquid crystal box, the second polarization unit and the color optical film in sequence after entering the liquid crystal display panel, the red light is emitted through the red light resistor, the green light is emitted through the green light resistor, the blue light is emitted through the third light resistor, and the required color is formed on the display surface of the liquid crystal display.

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 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, when monochromatic light transmitted in light guide plate 11, optics diaphragm 13, the loss is the same, can not exist because light guide plate 11, optics diaphragm 13 lead to the uneven condition of colour to the absorption loss difference of the light of different colours, consequently, the blue light that blue light source 12 sent is behind light guide plate 11 and optics diaphragm 13, and the light colour that jets into liquid crystal display panel 20 is even, has promoted LCD's optical effect.

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, a second polarization unit 23, and a color optical film 24 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, the second polarization unit 23, and the color optical film 24 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 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 this embodiment, the second polarization unit 23 is a second polarizer, and as shown in fig. 5, the second polarizer 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. 5, the second polarizer may further include: the second surface treatment layer 234 is disposed on the light-emitting side of the second protection film layer 231, and the second pressure-sensitive adhesive layer 235 is disposed on the light-emitting side of the second compensation film layer 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.

In the present embodiment, referring to fig. 1, the liquid crystal cell 22 includes: the backlight module 10 includes a first transparent substrate 221, a semiconductor device layer 222, a liquid crystal cell 223, and a second transparent substrate 224 sequentially arranged along a light emitting direction of the backlight module.

The first transparent substrate 221 and the second transparent substrate 224 are used to support and protect the semiconductor element layer 222 and the liquid crystal cell 223. The first and second

transparent substrates

221 and 224 are made of transparent materials, which may be Glass, PET (thermoplastic polyester), 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 224, 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.

In the present embodiment, the color optical film 24 includes: a first transparent film 241; a second transparent film 242 disposed on the light exit side of the first transparent film; and a yellow phosphor layer 243 disposed between the first and second

transparent films

241 and 242, a plurality of red, green, and

third photoresists

244, 245, and 246 arranged in sequence.

The first transparent film 241 and the second transparent film 242 are used for supporting and protecting the yellow phosphor layer 243, the red photoresist 244, the green photoresist 245 and the third photoresist 246. The first transparent film 241 may be made of Glass, PI, PET, PMMA (polymethyl methacrylate), etc., and the second transparent film 242 may be made of Galss, PI, PET, PMMA, etc.

The yellow phosphor layer 243 includes a yellow phosphor for converting blue light incident into the yellow phosphor layer 243 into white light, that is, light incident into the yellow phosphor layer 243 is blue light, and light exiting the yellow phosphor layer is white light.

The red photoresist 244 filters red light.

The green photoresist 245 filters green light.

The third photoresist 246 is used to transmit blue light, that is, the light emitted from the third photoresist 246 is blue light.

In some embodiments, third photoresist 246 may be a blue photoresist (which passes blue light) or a clear photoresist (which passes light of any color). At this time, referring to fig. 6, the red photoresist 244 and the green photoresist 245 are disposed between the yellow phosphor layer 243 and the second transparent film 242, and the third photoresist 246 is adjacent to the first transparent film 241 and the second transparent film 242 (that is, the light incident surface of the third photoresist 246 is adjacent to the first transparent film 241, and the light emitting surface of the third photoresist 246 is adjacent to the second transparent film 242), that is, the yellow phosphor layer 243 is not disposed on the light incident side of the third photoresist 246. Thus, the blue light emitted from the blue light source 12 sequentially passes through the light guide plate 11, the optical film 13, the first polarization unit 21, the liquid crystal cell 22, the second polarization unit 23 and the first transparent film 241, and then is incident into the third photoresist 246 and the yellow phosphor layer 243, respectively, the blue light passes through the third photoresist 246 and then is emitted, the blue light enters the yellow phosphor layer 243 and then is converted into white light under the excitation of the yellow phosphor layer 243, the white light is incident into the red photoresist 244 and the green photoresist 245, and then is filtered by the red photoresist 244 to emit red light, and is filtered by the green photoresist 245 to emit green light. That is, the light incident on the red photoresist 244 is white light, the light exiting from the red photoresist 244 is red light, the light incident on the green photoresist 245 is white light, and the light exiting from the green photoresist 245 is green light; the light incident on the third photoresist 246 is blue light, and the light exiting the third photoresist 246 is blue light. In this embodiment, the thickness relationship of the red photoresist 244, the green photoresist 245, the third photoresist 246 and the yellow phosphor layer 243 may be: the thickness of the third photoresist 246 is equal to the thickness of the red photoresist 244 + the thickness of the yellow phosphor layer 243 is equal to the thickness of the green photoresist 245 + the thickness of the yellow phosphor layer 243.

In some embodiments, the third photoresist 246 may be a blue photoresist. At this time, referring to fig. 7, a red photoresist 244, a green photoresist 245 and a third photoresist 246 are disposed between the yellow phosphor layer 243 and the second transparent film 242, that is, the light-emitting side of the yellow phosphor layer 243 is disposed with the red photoresist 244, the green photoresist 245 and the third photoresist 246, and the light-entering side of the third photoresist 246 is also disposed with the yellow phosphor layer 243. Thus, the blue light emitted from the blue light source 12 sequentially passes through the light guide plate 11, the optical film 13, the first polarization unit 21, the liquid crystal cell 22, the second polarization unit 23, and the first transparent film 241, and then enters the yellow phosphor layer 243, and is excited by the yellow phosphor layer 243 to become white light, which enters the red photoresist 244, the green photoresist 245, and the third photoresist 246, respectively, and then is filtered by the red photoresist 244 to emit red light, and is filtered by the green photoresist 245 to emit green light, and is filtered by the third photoresist 246 to become blue light. That is, the light incident on the red photoresist 244 is white light, the light exiting from the red photoresist 244 is red light, the light incident on the green photoresist 245 is white light, and the light exiting from the green photoresist 245 is green light; the light incident on the third photoresist 246 is white light, and the light exiting the third photoresist 246 is blue light. In this embodiment, the thickness relationship of the red photoresist 244, the green photoresist 245, and the third photoresist 246 may be: the thickness of the third photoresist 246 is equal to the thickness of the red photoresist 244 and the thickness of the green photoresist 245.

In this embodiment, referring to fig. 6 and 7, the color optical film 24 may further include: and the light blocking wall 247 is arranged among the red photoresist 244, the green photoresist 245 and the third photoresist 246, and is used for isolating the red photoresist 244, the green photoresist 245 and the third photoresist 246 to prevent light crosstalk. The light blocking walls 247 are made of a non-light transmissive material, for example, the light blocking walls 247 may be black. When the light-incident side of third photoresist 246 is not provided with yellow phosphor layer 243, as shown in fig. 6, the thickness of light-blocking wall 247 may be: the thickness of the light blocking wall 247 is equal to the thickness of the third photoresist 246, which is equal to the thickness of the red photoresist 244 + the thickness of the yellow phosphor layer 243, which is equal to the thickness of the green photoresist 245 + the thickness of the yellow phosphor layer 243. When yellow phosphor layer 243 is disposed on the light incident side of third photoresist 246, as shown in fig. 7, light-blocking walls 247 may have a thickness of: the thickness of the light blocking wall 247 is equal to the thickness of the third photoresist 246 is equal to the thickness of the red photoresist 244 is equal to the thickness of the green photoresist 245.

The present embodiment proposes a liquid crystal display, which includes: backlight unit and set up the liquid crystal display panel in backlight unit light-emitting side, wherein, backlight unit 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 polarizing unit, a liquid crystal box, a second polarizing unit and a color optical film which are sequentially arranged along the light emitting direction of the backlight module; the liquid crystal cell includes: the liquid crystal display panel comprises a first transparent substrate, a semiconductor element layer, a liquid crystal unit and a second transparent substrate which are sequentially arranged along a light emergent direction; the color optical film includes: a first transparent film; a second transparent film disposed on a light exit side of the first transparent film; and the yellow fluorescent powder layer is arranged between the first transparent film and the second transparent film, and the red light resistor, the green light resistor and the third light resistor are sequentially arranged. Thus, the blue light emitted by the blue light source is incident from the light incident surface of the light guide plate, is emitted from the light emitting surface of the light guide plate, passes through the optical film and then enters the liquid crystal display panel, and since the light emitted by the blue light source is blue light, and the loss of monochromatic light is the same when the monochromatic light is transmitted in the light guide plate and the optical film, the color of the light emitted by the backlight module enters the liquid crystal display panel is uniform, the situations that the color of the light emitted by the backlight module is yellowish 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, meanwhile, after the blue light enters the liquid crystal display panel, the red light is emitted through the red light resistor, the green light is emitted through the green light resistor, and the blue light is emitted through the third light resistor, the required color is formed on the display surface of the liquid crystal display, and because the color optical film for filtering the blue light to emit the red, green and blue light is arranged outside the liquid crystal box in the application, a unit for filtering the light to emit the three primary colors of light is not required to be arranged in the liquid crystal box, so that the manufacturing difficulty of the liquid crystal box can be reduced.

Based on the foregoing embodiments, the liquid crystal display of the present embodiment is proposed. In this embodiment, see fig. 8: the liquid crystal cell 22 may also include:

a first in-cell compensation film 225 disposed between the semiconductor element layer 222 and the liquid crystal cell 223;

and a second in-cell compensation film 226 disposed between the liquid crystal cell 223 and the second transparent substrate 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 films

225 and 226 in the first and second cells can be designed for the blue light. In order to make the compensation film 225 in the first box and the compensation film 226 in the second box better compensate the blue light, the planar phase difference value of the compensation film 225 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 in-plane phase difference value of the compensation film 225 in the first cartridge 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 226 in the second box can be 35 nm-60 nm, and the vertical phase difference value can be 119 nm-150 nm, for example, the planar phase difference value of the compensation film 226 in the second box can be 35nm, 50nm, 60nm, etc., and the vertical phase difference value can be 119nm, 140nm, 150nm, etc. Because the first in-box compensation film 225 and the second in-box compensation film 226 are designed for blue light, blue light can be better compensated, light emitted into the pixel layer is sufficient, and light leakage can be avoided.

In some embodiments, the first in-cell compensation film 225 may be composed of a first a-plate compensation film 2251 and a first c-plate compensation film 2252, wherein the first c-plate compensation film 2252 is disposed on the light incident side of the first a-plate compensation film 2251, that is, the pair of first a-plate compensation films 2251 overlaps the light emitting side of the first c-plate compensation film 2252, the first a-plate compensation film 2251 is disposed between the first c-plate compensation film 2252 and the liquid crystal cell 223, and the first c-plate compensation film 2252 is disposed between the semiconductor device layer 222 and the first a-plate compensation film 2251.

In some embodiments, the compensation film 226 in the second box may be composed of a second a-plate compensation film 2261 and a second c-plate compensation film 2262, wherein the second c-plate compensation film 2262 is disposed on the light emitting side of the second a-plate compensation film 2261, that is, the second c-plate compensation film 2262 overlaps the light emitting side of the second a-plate compensation film 2261; a second a-plate compensation film 2261 is disposed between the liquid crystal cell 223 and a second c-plate compensation film 2262, and the second c-plate compensation film 2262 is disposed between the second a-plate compensation film 2261 and the second transparent substrate 224.

For the first a-plate 2251 and the second a-plate 2262, 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-out plane, and may be selected from ne ═ nx > no ny or ne ═ ny > nx according to the different light-out electric field directions, where nx and ny are the planes on which the light-out 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.

For the first and second C-plate 2252, the C-plate 2252 is made of a C-plate optical material, which may be a disc-shaped molecular material, and the molecular material also has anisotropy and also has ne and no, and no ═ nx ═ ny of the disc-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., the plane where the film is located) is located, and the refractive index in the film thickness direction (perpendicular to the light-emitting surface) is nz ═ ne. Wherein ne < no for the negative c-plate optical material.

In one example, the first A-plate 2251 is made of a uniaxial A-plate optical material, the first C-plate 2252 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 compensation film is made of 2261 uniaxial A-plate optical material, the second C-plate compensation film 2262 is made of negative C-plate optical material, ne of the uniaxial 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. 9, when the first polarization unit 21 is a first polarizer and the compensation film 225 and the compensation film 226 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).

In this embodiment, referring to fig. 10, when the second polarization unit 23 is a second polarizer and the compensation film 225 and the compensation film 226 are disposed in the liquid crystal cell 22, the second compensation film 233 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).

It should be noted that in some embodiments, the second in-cell compensation film 225 and the second in-cell compensation film 226 may not be disposed within the liquid crystal cell 22. In this case, referring to fig. 3, when the first polarizing unit 21 is a first polarizer, the first compensation film layer 213 may be designed for blue light in order to better compensate for the blue light. For example, the planar phase difference value of the first compensation film layer 213 may range from 35nm to 60nm, and the vertical phase difference value may range from 119nm to 150 nm; for example, the planar phase difference value of the first compensation film layer 213 may be 35nm, 49nm, 60nm, etc., and the vertical phase difference value may be 119nm, 123nm, 150nm, etc. Referring to fig. 4, when the second polarizing unit 23 is a second polarizer, the second compensation film 233 may be designed for blue light in order to better compensate for the blue light. For example, the planar phase difference value of the second compensation film 233 may range from 35nm to 60nm, and the vertical phase difference value may range from 119nm to 150 nm; for example, the planar phase difference value of the second compensation film 233 may be 35nm, 52nm, 60nm, etc., and the vertical phase difference value may be 119nm, 133nm, 150nm, etc.

In the liquid crystal display provided by the embodiment, the liquid crystal box further comprises a first in-box compensation film arranged between the semiconductor element layer and the liquid crystal unit, and a second in-box compensation film arranged between the liquid crystal unit and the second transparent substrate, wherein the first in-box compensation film and the second in-box compensation film are designed for blue light, so that the blue light can be better compensated, the light emitted into 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

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;

2. The liquid crystal display of claim 1, wherein the first polarizing unit is a metal grating.

3. The liquid crystal display of claim 1, wherein the first polarizing unit comprises: the first protection film layer, the first polarizing layer and the first compensation film layer are sequentially arranged along the light emergent direction;

4. The liquid crystal display of claim 3, wherein the first compensation film layer has a planar phase difference value of 35nm to 60nm and a vertical phase difference value of 119nm to 150 nm;

5. The liquid crystal display of claim 3, wherein the liquid crystal cell further comprises:

6. The liquid crystal display of claim 5, wherein the compensation film in the first cell has a planar phase difference value of 35nm to 60nm and a vertical phase difference value of 119nm to 150 nm; the planar phase difference value of the compensation film in the second box is 35-60 nanometers, and the vertical phase difference value is 119-150 nanometers.

7. The liquid crystal display of claim 6, wherein the first compensation film layer has a planar phase difference value of 0 and a vertical phase difference value of 0;

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;

9. The liquid crystal display according to any one of claims 1 to 7, wherein the third resist is a blue resist;

10. A display device, characterized in that the display device comprises a liquid crystal display according to any one of claims 1 to 9.