CN110221477A

CN110221477A - Array substrate, liquid crystal display, terminal

Info

Publication number: CN110221477A
Application number: CN201910465169.7A
Authority: CN
Inventors: 郭霄; 代郁峰; 秦鸿一
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2019-09-10
Anticipated expiration: 2039-05-30
Also published as: CN110221477B

Abstract

The application provides a kind of array substrate, liquid crystal display, terminal, is related to field of display technology, for solving the problems, such as that semitransparent semi-reflective liquid crystal display device power consumption is higher.Array substrate includes: the first substrate and multiple sub-pixel units on the first substrate；Feux rouges sub-pixel unit includes the red quantum dot layer and the first transflection layer that stacking is placed, and the first transflection layer is for transmiting quantum dot exciting light and at least reflection feux rouges；Green light sub-pixel unit includes the green quantum dot layer and the second transflection layer that stacking is placed, and the second transflection layer is for transmiting quantum dot exciting light and at least reflection green light；Blue light sub-pixel unit includes the blue quantum dot layer and third transflection layer that stacking is placed, and third transflection layer is for transmiting quantum dot exciting light and at least reflection blue light；Quantum dot exciting light is for exciting red quantum dot layer to glow, exciting green quantum dot layer green light and excitated blue quantum dot layer blue light-emitting.

Description

Array substrate, liquid crystal display screen and terminal

Technical Field

The application relates to the technical field of display, in particular to an array substrate, a liquid crystal display screen and a terminal.

Background

With the development of display technology, a light and thin display panel is popular with consumers, especially a light and thin Liquid Crystal Display (LCD).

In general, outdoor light has higher intensity than indoor light, and when the liquid crystal display device is in strong sunlight, the display light transmitted by the liquid crystal display device is much weaker than the sunlight reflected by the surface of the liquid crystal display device, so that the display effect of the liquid crystal display device is extremely poor, and the picture displayed by the liquid crystal display device is difficult to see.

Based on this, those skilled in the art propose a transflective liquid crystal display device, in which the backlight module is turned on under the condition of dark ambient light, and the transmissive mode plays a leading role, thereby realizing color display. When the ambient light is strong, the backlight module is closed, the reflection mode plays a role, and color display is realized. And the stronger the ambient light, the better the display effect of the liquid crystal display device is when the liquid crystal display device is used outdoors, and the energy consumption can be reduced.

However, in the conventional transflective liquid crystal display device, the color filter layer is formed by mixing a polymer material and an organic dye, and is classified into red, green and blue. When the backlight performs color conversion through the red, green and blue filter films, only one color of red, green and blue light in the backlight can penetrate through the color filter layer, so that the transmittance is only 1/3, and at least 2/3 of light intensity is lost, thereby causing the transflective liquid crystal display device to ensure normal display brightness by improving input electric power, and increasing the power consumption of the transflective liquid crystal display device.

Disclosure of Invention

The embodiment of the application provides an array substrate, a liquid crystal display screen and a terminal, and is used for solving the problem that the power consumption of a semi-transparent and semi-reflective liquid crystal display device is high.

In order to achieve the above purpose, the following technical solutions are adopted in this embodiment:

in a first aspect, an array substrate is provided, including: the display device comprises a first substrate and a plurality of sub-pixel units which are arranged on the first substrate at intervals; the plurality of sub-pixel units arranged at intervals comprise a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit; the red sub-pixel unit comprises a red quantum dot layer and a first transflective layer which are stacked, wherein the first transflective layer is positioned between the red quantum dot layer and the first substrate, and the first transflective layer is used for transmitting quantum dot exciting light and at least reflecting red light; the green light sub-pixel unit comprises a green quantum dot layer and a second transflective layer which are stacked, the second transflective layer is positioned between the green quantum dot layer and the first substrate, and the second transflective layer is used for transmitting quantum dot exciting light and at least reflecting green light; the blue light sub-pixel unit comprises a blue quantum dot layer and a third transflective layer which are stacked, the third transflective layer is positioned between the blue quantum dot layer and the first substrate, and the third transflective layer is used for transmitting quantum dot excitation light and at least reflecting blue light; wherein the quantum dot excitation light is used for exciting the red quantum dot layer to emit red light, the green quantum dot layer to emit green light and the blue quantum dot layer to emit blue light. This array substrate is under transmission mode, because red quantum dot layer, green quantum dot layer and blue quantum dot layer can be based on quantum dot excitation light excitation quantum dot respectively and send ruddiness, green glow and blue light, because of compare in the structure that the colored filter layer is formed by macromolecular material and organic dye mixture, the array substrate luminous efficacy that this application provided is higher, can obviously improve semi-transparent half-reflection formula liquid crystal display's luminous efficiency (about promoting 90%), reduce the consumption at terminal. Under the reflection mode, red quantum dot layer, green quantum dot layer and blue quantum dot layer can more make full use of ambient light excitation go out red, green, blue tricolor light (quantum dot layer can absorb all light that wavelength is less than quantum dot layer luminous peak wavelength in the ambient light), compare the structure that the color filter layer is formed by macromolecular material and organic dye mixture, the array substrate that this application provided can promote by a wide margin to the utilization ratio of ambient light, transflective liquid crystal display's display luminance and contrast can promote more than 50%.

Optionally, the first transflective layer is a red-green light reflection increasing layer; the red and green light reflection increasing layer is used for reflecting red light and green light, and the material of the red and green light reflection increasing layer is a light-transmitting material. The red and green light reflection increasing layer can not affect the transmission of blue light and can reflect red light and green light, so that the utilization rate of the red quantum dot layer to backlight can be improved.

Optionally, the second transflective layer is a red-green light reflection increasing layer; the red and green light reflection increasing layer is used for reflecting red light and green light, and the material of the red and green light reflection increasing layer is a light-transmitting material. The red and green light reflection increasing layer can not affect the transmission of blue light and can reflect red light and green light, so that the utilization rate of the green quantum dot layer to backlight can be improved.

Optionally, the first transflective layer and the second transflective layer are red-green light reflection increasing layers; the red and green light reflection increasing layer is used for reflecting red light and green light, and the material of the red and green light reflection increasing layer is a light-transmitting material.

On the basis, the first transflective layer and the second transflective layer are optionally of an integral structure. The first transflective layer and the second transflective layer are of an integral structure and can be synchronously formed, so that the requirement on the preparation precision can be simplified.

Optionally, at least one of the first transflective layer, the second transflective layer and the third transflective layer is a reflective layer, and the reflective layer is used for reflecting red light, green light and blue light; the material of the reflecting layer is a shading material; the light reflecting layer comprises at least one through hole, and the through hole is used for transmitting the quantum dot excitation light. The reflecting layer is lower in preparation cost than the reflection increasing layer, so that the cost can be reduced by arranging the first transflective layer, the second transflective layer or the third transflective layer as the reflecting layer. In addition, part of light which does not pass through the through hole in the backlight is reflected back to the backlight module by the first transflective layer, the second transflective layer or the third transflective layer, is reflected to the first transflective layer, the second transflective layer and the third transflective layer again after the light path is changed, and is emitted out of the through hole, so that the utilization rate of the backlight is high.

Optionally, under the condition that the first transflective layer and the second transflective layer are both reflective layers, the first transflective layer and the second transflective layer are of an integrated structure. The second transflective layer and the third transflective layer are of an integral structure, and the first transflective layer and the second transflective layer can be synchronously formed, so that the process requirement can be reduced.

Optionally, under the condition that the second transflective layer and the third transflective layer are both reflective layers, the second transflective layer and the third transflective layer are of an integrated structure. The second transflective layer and the third transflective layer are integrated, and the second transflective layer and the third transflective layer can be synchronously formed, so that the process requirements can be reduced.

Optionally, under the condition that the first transflective layer, the second transflective layer and the third transflective layer are reflective layers, the first transflective layer, the second transflective layer and the third transflective layer are of an integral structure. The first transflective layer, the second transflective layer and the third transflective layer are integrated, and the second transflective layer and the third transflective layer can be synchronously formed, so that the process requirements can be reduced. In addition, after the first transflective layer, the second transflective layer and the third transflective layer are connected into an integral structure, the part between the adjacent sub-pixel units can reflect the backlight which does not penetrate through the reflective layer back to the backlight module for reuse, so that the utilization rate of the backlight can be improved.

Optionally, the first transflective layer is a red light reflection increasing layer for reflecting red light; the material of the red light reflection increasing layer is a light-transmitting material. The reflection increasing layer reflecting only one kind of light is simpler than the reflection increasing layer reflecting a plurality of colors of light simultaneously.

Optionally, the second transflective layer is a green light reflection increasing layer for reflecting green light; the green light reflection increasing layer is made of a light-transmitting material. The reflection increasing layer reflecting only one kind of light is simpler than the reflection increasing layer reflecting a plurality of colors of light simultaneously.

Optionally, the third transflective layer is a blue light reflection increasing layer, and the blue light reflection increasing layer is used for reflecting blue light; the blue light reflection increasing layer is made of a light-transmitting material. The reflection increasing layer reflecting only one kind of light is simpler than the reflection increasing layer reflecting a plurality of colors of light simultaneously.

Optionally, the array substrate further includes a first wire grid polarizing layer located on one side of the plurality of sub-pixel units arranged at intervals, which is far away from the first substrate; the first wire grid polarizing layer comprises a plurality of first polarizing units, and the first polarizing units and the sub-pixel units arranged at intervals are arranged in a one-to-one opposite mode.

Optionally, a plurality of concave points are arranged on the surface of the first wire grid polarizing layer away from the first substrate. The concave point can change the light path, so that part of the light which is supposed to be reflected to the liquid crystal layer is reflected to other areas, or is totally reflected in the concave point all the time and does not emit to the liquid crystal layer. Therefore, the reflection of the first wire grid polarizing layer to ambient light can be reduced, and the display effect is improved.

Optionally, a light absorbing layer is disposed on a surface of the first wire grid polarizing layer away from the first substrate; an orthographic projection of the light absorbing layer on the first substrate is located within an orthographic projection of the first wire grid polarizing layer on the first substrate. By arranging the light absorbing layer on the surface of the first wire grid polarizing layer far away from the first substrate, part of light which is supposed to be reflected to the liquid crystal layer can be absorbed and is not emitted to the liquid crystal layer. Therefore, the reflection of the first wire grid polarizing layer to ambient light can be reduced, and the display effect is improved.

Optionally, the array substrate further includes a first light-shielding matrix, the first light-shielding matrix is located on one side of the first wire grid polarizing layer close to the first substrate, and the first transflective layer, the second transflective layer and the third transflective layer are all located on one side of the first light-shielding matrix close to the first substrate; the first shading matrix comprises a plurality of first shading strips extending along a first direction and a plurality of second shading strips extending along a second direction; the arrangement structure of the multiple sub-pixel units arranged at intervals is a matrix with M rows by N columns, the first direction is the row direction of the sub-pixel unit matrix, and the second direction is the column direction of the sub-pixel unit matrix; m and N are positive integers; each first light-shielding strip is positioned between two adjacent rows of sub-pixel units in the matrix formed by the sub-pixel units arranged at intervals, and each second light-shielding strip is positioned between two adjacent columns of sub-pixel units in the matrix formed by the sub-pixel units arranged at intervals.

Optionally, the first wire grid polarizing layer includes a plurality of first wires arranged in parallel, and the first wires extend from one side of the array substrate to the opposite side; each first wiring penetrates through a plurality of first polarization units in the extending direction of the first wiring, and the part of each first wiring penetrating through one first polarization unit forms a wire grid corresponding to the first polarization unit. The first wire grid polarizing layer with the structure has a simple structure and is convenient to prepare.

Optionally, the plurality of first polarization units are arranged in an array; the first wire grid polarization layer comprises a plurality of second wires which are arranged in parallel, and the second wires extend from one side of the first polarization unit to the other opposite side to form one wire grid in the first polarization unit.

Optionally, each of the plurality of sub-pixel units arranged at intervals further includes a pixel electrode; each of the plurality of first polarization units is multiplexed as a pixel electrode in a sub-pixel unit directly opposite to the first polarization unit. By multiplexing the first polarization unit as the pixel electrode, the pixel electrode does not need to be arranged on the array substrate independently, the preparation process can be simplified, and the array substrate is light and thin.

Optionally, the first wire grid polarizing layer further includes M +1 third light-shielding strips extending along the first direction and N +1 fourth light-shielding strips extending along the second direction, in addition to the plurality of first polarizing units, where the plurality of first polarizing units include M × N first polarizing units, an arrangement structure of the M × N first polarizing units is a matrix of M rows × N columns, the first direction is a row direction of the matrix, and the second direction is a column direction of the matrix; the grid formed by the M +1 third light-shielding strips and the N +1 fourth light-shielding strips comprises M × N closed grids, the M × N first polarization units are located in the M × N closed grids one by one, and M and N are positive integers. The third shading strip and the fourth shading strip serve as shading matrixes, and the shading matrixes do not need to be arranged in the semi-transparent semi-reflective liquid crystal display screen, so that the preparation process is simplified. In addition, light that does not pass through the first wire grid polarizer layer is reflected by the first wire grid polarizer layer back to the quantum dot layer without being absorbed. The light is converted into unpolarized light by the quantum dot layer and then emitted to the first grid polarizing layer again. The light with the polarization direction parallel to the light transmission axis direction of the first wire grid polarization layer in the unpolarized light can be emitted, and the utilization rate of the light emitted by the quantum dots can be improved.

Optionally, each of the plurality of sub-pixel units arranged at intervals further includes a common electrode and a pixel electrode, the pixel electrode is arranged on a side of the common electrode away from the first substrate, and the pixel electrode includes a plurality of electrode strips; each of the plurality of first polarization units is multiplexed as a common electrode in a sub-pixel unit directly opposite to the first polarization unit. By multiplexing the first polarization unit as the common electrode, it is not necessary to separately provide the common electrode on the array substrate and the opposite substrate, and the manufacturing process can be simplified.

Optionally, each of the plurality of sub-pixel units arranged at intervals further includes a pixel circuit and a pixel electrode, and the red light reflection layer, the green light reflection layer and the blue light reflection layer are all located on one side of the pixel circuit away from the first substrate; the pixel circuit is electrically connected to the pixel electrode for supplying a data voltage to the pixel electrode.

Optionally, the array substrate further includes a flat layer, the flat layer is located on a side of the first wire grid polarization layer facing the first substrate, and the red quantum dot layer, the green quantum dot layer, and the blue quantum dot layer are located on a side of the flat layer away from the first wire grid polarization layer. The preparation effect of the first wire grid polarizing layer can be ensured.

In a second aspect, there is provided a liquid crystal display panel comprising an opposing substrate and the array substrate of any one of the first aspect; the opposite substrate includes a second substrate and an upper polarizing layer disposed on the second substrate.

Optionally, in a case where the first polarization unit is multiplexed as a pixel electrode, the opposite substrate further includes a common electrode disposed on a side of the second substrate facing the array substrate, and the common electrode corresponds to the first polarization unit one by one.

In a third aspect, there is provided a terminal comprising the liquid crystal display of the second aspect; the terminal also comprises a backlight module arranged on the light incident surface of the liquid crystal display screen.

Drawings

Fig. 1 is a schematic diagram of a framework of a terminal according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another backlight module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a middle frame according to an embodiment of the present application;

fig. 5 is a region division diagram of a transflective liquid crystal display panel according to an embodiment of the present disclosure;

fig. 6a is a schematic structural diagram of a transflective liquid crystal display panel according to an embodiment of the present disclosure;

FIG. 6b is a cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 6c is another cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 6d is a further cross-sectional view taken along line A-A' of FIG. 6 a;

fig. 7a is a schematic structural diagram of an array substrate according to an embodiment of the present disclosure;

fig. 7b is a schematic structural diagram of another array substrate according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a first wire grid polarizing layer according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of another first wire grid polarizing layer provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of another first wire grid polarizing layer provided in an embodiment of the present application;

FIG. 11a is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 11b is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 12a is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 12b is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 12c is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 13 is a further cross-sectional view taken along line A-A' of FIG. 6 a;

FIG. 14 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 15 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 16 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 17 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 18 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 19 is a further cross-sectional view taken along line A-A' of FIG. 6 a;

fig. 20a is a schematic structural diagram of a first wire grid polarizing layer according to an embodiment of the present disclosure;

fig. 20b is a schematic structural diagram of another first wire grid polarizing layer provided in the embodiment of the present application;

FIG. 20c is a cross-sectional view taken along line B-B' of FIG. 20 a;

fig. 21a is a schematic structural diagram of a first wire-grid polarizing layer and a light absorbing layer according to an embodiment of the present disclosure;

FIG. 21b is a cross-sectional view taken along line C-C' of FIG. 21 a;

FIG. 22 is a further sectional view taken along line A-A' of FIG. 6 a;

FIG. 23a is a further cross-sectional view taken along line A-A' of FIG. 6 a;

fig. 23b is a schematic structural diagram of a first light-shielding matrix according to an embodiment of the present application;

fig. 24 is a schematic structural view of another transflective liquid crystal display panel according to an embodiment of the present disclosure;

fig. 25 is a schematic structural view of another transflective liquid crystal display panel provided in this embodiment of the present application;

fig. 26 is a schematic structural view of another transflective liquid crystal display panel provided in this embodiment of the present application;

fig. 27 is a schematic structural view of another transflective liquid crystal display panel according to an embodiment of the present application;

fig. 28 is a schematic structural view of another transflective liquid crystal display panel provided in this embodiment of the present application.

Reference numerals:

01-a terminal; 10-a cover plate; 20-a transflective liquid crystal display screen; 21-an array substrate; 211-a first substrate; 212-first wire grid polarizing layer; 2121-a first polarizing unit; 21211 — a first wiring; 21212 — a second wiring; 2122-pits; 2123-third shading strip; 2124-fourth shading strip; 2125-first side; 2126-a second side edge; 213-red sub-pixel cell; 2131-a red quantum dot layer; 2132-a first transflective layer; 214-green sub-pixel cell; 2141-a green quantum dot layer; 2142-a second transflective layer; 215-blue sub-pixel cell; 2151-blue quantum dot layer; 2152-a third transflective layer; 21521-through holes; 216-a light absorbing layer; 217-a planar layer; 218-a first shading matrix; 2181-first shading strip; 2182-a second shading strip; 219 — first alignment layer; 22-a counter substrate; 221-a second substrate; 222-an upper polarizing layer; 223-a second alignment layer; 23-a liquid crystal layer; 24-frame sealing glue; 25-pixel circuits; 26-a common electrode; 27-pixel electrodes; 271-electrode strips; 30-a backlight module; 31-a light source; 32-a light guide plate; 33-an optical membrane; 34-a reflector sheet; 40-middle frame; 41-a bearing platform; 42-foam cotton glue; 50-shell.

Detailed Description

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art. The terms "first," "second," and the like as used in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.

The directional terms "left", "right", "upper" and "lower" are defined with respect to the orientation in which the array substrate or the terminal is schematically placed in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for the description and clarification of the relative terms, and may be changed accordingly according to the change of the orientation in which the array substrate or the terminal is placed.

The embodiment of the application provides a terminal which comprises a transmission mode and a reflection mode. The terminal related to the embodiment of the application may be, for example: the mobile phone comprises intelligent equipment such as a tablet Personal Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, a Personal Digital Assistant (PDA), vehicle-mounted equipment, a television, wearable equipment, a watch, a mechanical equipment screen and an outdoor display screen. The embodiment of the present application does not specifically limit the specific form of the terminal, and for convenience of description, the following description takes the terminal as a mobile phone as an example.

As shown in fig. 1, the terminal 01 mainly includes: a cover plate 10, a transflective liquid crystal display 20, a backlight unit (BLU) 30, a middle frame 40 and a housing 50. It should be appreciated that terminal 01 has both a transmissive mode and a reflective mode.

The transflective liquid crystal display 20 has a light-emitting side a1 where a display screen can be seen and a back side a2 opposite to the light-emitting side a1, the cover plate 10 is located at the light-emitting side a1 of the transflective liquid crystal display 20 for protecting the transflective liquid crystal display 20, and the cover plate 10 and the transflective liquid crystal display 20 can be bonded by an Optically Clear Adhesive (OCA).

The cover plate 10 may be, for example, Cover Glass (CG), which may have a certain toughness.

The backlight module 30 is located on the backside a2 of the transflective liquid crystal display 20, and when the backlight module 30 is turned off, the ambient light provides a light source to the transflective liquid crystal display 20, and the terminal 01 performs display in a reflective mode. When the backlight module 30 is turned on, the backlight module 30 is used to provide light to the transflective liquid crystal display 20, and the terminal 01 can display in a transmissive mode.

As shown in fig. 2, the backlight module 30 may be a side-in type backlight module. The side-in backlight module includes a light source 31, a light guide plate 32, an optical film 33 and a reflective sheet 34.

The light source 31 is disposed on a side surface of the light guide plate 32. The light source 31 may emit white light, in which case the backlight assembly 30 is used to provide white light to the transflective liquid crystal display panel 20. The white Light may be emitted by a blue-emitting diode (LED) after the LED excites the phosphor, or may be emitted by a white LED.

Since the blue light has less light loss when passing through the blue sub-pixel unit, the light source 31 may emit blue light in order to improve the utilization rate of the transflective liquid crystal display panel 20 to the backlight and reduce the light loss. In this case, the backlight assembly 30 is used to supply blue light to the transflective liquid crystal display panel 20. The light source 31 may be a light bar formed by blue LEDs, which also reduces the cost of the light source 31. The light emission wavelength of the blue LED may be between 400nm and 470 nm. The light source 31 may include one blue LED or a plurality of blue LEDs according to the size of the transflective lcd panel 20.

The light guide plate 32 has two cross-sectional shapes, i.e., a wedge shape and a flat plate shape, and the cross-sectional shape of the light guide plate 32 is illustrated as a wedge plate in fig. 2.

The optical film 33 is disposed on the light exit side of the light guide plate 32. The optical film 33 may include a diffuser sheet, or a brightness enhancement film, or both a diffuser sheet and a brightness enhancement film. The Brightness Enhancement Film may comprise a prismatic Film (BEF), or a Dual Brightness Enhancement Film (DBEF), or both a prismatic Film and a reflective polarization Brightness Enhancement Film.

The reflective sheet 34 is disposed on a side of the light guide plate 32 facing away from the light exit side.

Light emitted from the light source 31 is incident on the light guide plate 32. The light guide plate 32 is used to transmit and reflect the optical fiber emitted from the light source 31. The reflective sheet 34 serves to reflect light leaking from the light guide plate 32 back to the light guide plate 32. The optical film 33 serves to reinforce the light emitted from the light guide plate 32 and to emit the light to the transflective liquid crystal display panel 20.

As shown in fig. 3, the backlight module 30 may be a direct-type backlight module. The direct-type backlight module includes a light source 31, an optical film 33 and a reflective sheet 34.

The light source 31 is located at the bottom of the direct type backlight module. The light source 31 may emit white light and the light source 31 may emit blue light. The light source 31 may be a lamp panel made of micro LEDs arranged in an array, and the lamp panel emits light in the direction of the transflective liquid crystal display 20.

The optical film 33 is disposed on the light exit side of the light source 31.

The reflective sheet 34 is disposed on the side of the light source 31 opposite to the light exit side.

As shown in fig. 1, the middle frame 40 is located between the backlight module 30 and the housing 50.

As shown in fig. 4, the middle frame 40 is provided with a ring of carrying platform 41 at a side close to the backlight module 30. The supporting base 41 is adhered with foam rubber 42. The backlight module 30 is fixed on the middle frame 40 by the foam adhesive 42, so that the backlight module 30 is connected with the middle frame 40.

A gap H is formed between the back C2 of the backlight module 30 fixed on the supporting platform 41 and the first surface B1 of the middle frame 41. The back side C2 of the backlight module 30 is opposite to the light-emitting surface C1 of the backlight module 30, and the light-emitting surface C1 of the backlight module 30 faces the transflective liquid crystal display 20.

In addition, the second surface B2 of the middle frame 40 is used for mounting internal components such as a battery, a Printed Circuit Board (PCB), a Central Processing Unit (CPU), a Camera (Camera), and an antenna.

Note that the first surface B1 of the middle frame 40 is disposed opposite to the second surface B2. The first surface B1 is close to the backlight module 30, and the second surface B2 is close to the casing 50.

As shown in fig. 1, the housing 50 is mounted on the middle frame 40, and the housing 50 can protect the internal components mounted on the second surface B2 of the middle frame 40. The transflective liquid crystal display 20, the backlight module 30 and the middle frame 40 are disposed in a space enclosed by the cover plate 10 and the housing 50.

On the basis, as shown in fig. 5, the transflective lcd 20 divides an effective display area AA and a peripheral area BB, and fig. 5 illustrates the effective display area AA surrounded by the peripheral area BB as an example.

The effective display area AA is provided with a plurality of sub-pixel areas, which are a red sub-pixel area R, a green sub-pixel area G and a blue sub-pixel area B.

It should be noted that the sub-pixel regions refer to the regions where the sub-pixel units are located, and each sub-pixel region is used for disposing one sub-pixel unit. Therefore, the red sub-pixel region R is a region where the red sub-pixel unit is located, the green sub-pixel region G is a region where the green sub-pixel unit is located, and the blue sub-pixel region B is a region where the blue sub-pixel unit is located. It should be appreciated that each pixel cell includes three sub-pixel cells, a red sub-pixel cell, a green sub-pixel cell, and a blue sub-pixel cell.

The peripheral region BB is provided for a gate driver circuit, a source driver circuit, or the like.

As shown in fig. 6a, it shows the structure of the transflective liquid crystal display 20. The transflective liquid crystal display panel 20 includes an array substrate 21, an opposite substrate 22, and a liquid crystal layer 23, and the liquid crystal layer 23 is disposed between the array substrate 21 and the opposite substrate 22.

As shown in fig. 6b (fig. 6b is a cross-sectional view taken along a-a' direction of fig. 6 a), the array substrate 21 and the opposite substrate 22 are bonded together by the sealant 24, so that the liquid crystal layer 23 is confined in the liquid crystal cell enclosed by the array substrate 21, the opposite substrate 22 and the sealant 24.

The array substrate 21 is disposed close to the backlight module 30 with respect to the opposite substrate 22.

As shown in fig. 6c (fig. 6c is also a cross-sectional view along a-a' direction of fig. 6 a), the opposite substrate 22 includes a second substrate 221 and an upper polarizing layer 222 disposed on the second substrate 221.

Wherein, as shown in fig. 6c, the upper polarization layer 222 may be disposed on the surface of the second substrate 221 away from the liquid crystal layer 23. In this case, the upper polarizing layer 222 may be a fabricated polarizer (polarizer), and the upper polarizing layer 222 may also be a Grid Polarizer (GP).

Alternatively, as shown in FIG. 6d (FIG. 6d is also a cross-sectional view taken along the direction A-A' of FIG. 6 a), the upper polarizing layer 222 is disposed on the surface of the second substrate 221 near the liquid crystal layer 23. In this case, the upper polarizing layer 222 may be a second wire grid polarizing layer in consideration of the manufacturing process.

For convenience of description, the above polarizing layer 222 in the embodiment of the present application may be a polarizing plate.

As shown in fig. 7a, the array substrate 21 includes a first substrate 211 and a plurality of sub-pixel units disposed at intervals on the first substrate 211.

The plurality of spaced apart sub-pixel units includes a red sub-pixel unit 213, a green sub-pixel unit 214, and a blue sub-pixel unit 215.

The red sub-pixel unit 213 is located in the red sub-pixel region R, the green sub-pixel unit 214 is located in the green sub-pixel region G, and the blue sub-pixel unit 215 is located in the blue sub-pixel region B.

The red photonic pixel unit 213 includes a red quantum dot layer 2131 and a first transflective layer 2132, which are stacked, the first transflective layer 2132 being located between the red quantum dot layer 2131 and the first substrate 211. The first transflective layer 2132 is used for transmitting the quantum dot excitation light and reflecting at least red light. The red quantum dot layer 2131 includes a quantum dot material, and the red quantum dot layer 2131 can absorb light with a wavelength shorter than the emission wavelength thereof and emit red light according to the principle that the quantum dot material emits light after being excited by light with a wavelength shorter than the emission wavelength thereof. The wavelength range of red light emitted from the red quantum dot layer 2131 is relatively narrow. Illustratively, the emission wavelength of red quantum dot layer 2131 is greater than (or equal to) 600nm and less than (or equal to) 640nm, and then red quantum dot layer 2131 can absorb light having a wavelength less than 640nm and emit light having a wavelength greater than (or equal to) 600nm and less than (or equal to) 640 nm.

As can be seen from the above, in the transmissive mode, the backlight module 30 provides light to the red quantum dot layer 2131. As shown in fig. 7a, in the transmissive mode, the quantum dot excitation light M provided by the backlight module passes through the first transflective layer 2132 and then emits to the red quantum dot layer 2131.

The quantum dot excitation light M is light emitted from the backlight module 30. The quantum dot excitation light M may be blue light, white light, or other light, and for convenience of description, the quantum dot excitation light M is exemplified as blue light in the embodiment of the present application.

The red quantum dot layer 2131 is excited by the light emitted from the backlight module 30 and emits red light. Since the red quantum dot layer 2131 can emit light in all directions, or since the red quantum dot layer 2131 can emit light in 360 °, or since the red quantum dot layer 2131 can emit light from any position on its surface, and the emitted light can form any angle with the surface of the red quantum dot layer 2131. Therefore, a portion of the red light will be directed toward the liquid crystal layer 23, a portion of the red light will be directed toward the first transflective layer 2132, the first transflective layer 2132 will reflect the portion of the red light directed toward the first transflective layer 2132, and the reflected red light will be directed toward the liquid crystal layer 23.

As shown in fig. 7a, in the reflective mode, the backlight module is turned off, and the ambient light N provides a light source to the red quantum dot layer 2131. The ambient light N irradiates the red quantum dot layer 2131, a part of red light is emitted to the liquid crystal layer 23 after the red quantum dot layer 2131 is excited by light of the ambient light N with a wavelength shorter than that of the red light and emits red light, a part of the red light is emitted to the first transflective layer 2132, the first transflective layer 2132 reflects the part of the red light emitted to the first transflective layer 2132, and the reflected red light is also emitted to the liquid crystal layer 23.

The green photonic pixel cell 214 includes a green quantum dot layer 2141 and a second transflective layer 2142, which are stacked, the second transflective layer 2142 being located between the green quantum dot layer 2141 and the first substrate 211. The second transflective layer 2142 is configured to transmit the quantum dot excitation light and reflect at least green light.

Green quantum dot layer 2141 comprises a quantum dot material, and green quantum dot layer 2141 can absorb light less than its emission wavelength and emit green light. The wavelength range of green light emitted from green quantum dot layer 2141 is relatively narrow. Illustratively, the light emission wavelength of green quantum dot layer 2141 is greater than (or equal to) 530nm and less than (or equal to) 570nm, and then green quantum dot layer 2141 can absorb light having a wavelength less than 570nm and emit light having a wavelength greater than (or equal to) 530nm and less than (or equal to) 570 nm.

As shown in fig. 7a, in the transmissive mode, the quantum dot excitation light M provided by the backlight module passes through the second transflective layer 2142 and then emits to the green quantum dot layer 2141.

The green quantum dot layer 2141 is excited by light emitted from the backlight 30 and emits green light. Since green quantum dot layer 2141 can emit light in all directions, or green quantum dot layer 2141 can emit light in 360 °, or green quantum dot layer 2141 can emit light from any position on its surface, and the emitted light can form any angle with the surface of green quantum dot layer 2141. Therefore, a portion of the green light will be directed to the liquid crystal layer 23, a portion of the green light will be directed to the second transflective layer 2142, the second transflective layer 2142 reflects the portion of the green light directed to the second transflective layer 2142, and the reflected green light is directed to the liquid crystal layer 23.

As shown in fig. 7a, in the reflective mode, the backlight module is turned off, and the ambient light N provides a light source to the green quantum dot layer 2141. The ambient light N is irradiated to the green quantum dot layer 2141, after the green quantum dot layer 2141 is excited by light of the ambient light N having a wavelength smaller than that of the green light and emits green light, a part of the green light is emitted toward the liquid crystal layer 23, a part of the green light is emitted toward the second transflective layer 2142, the second transflective layer 2142 reflects the part of the green light emitted toward the second transflective layer 2142, and the reflected green light is emitted toward the liquid crystal layer 23.

Blue photonic pixel cell 215 includes a blue quantum dot layer 2151 and a third transflective layer 2152 disposed in a stack, with third transflective layer 2152 being located between blue quantum dot layer 2151 and first substrate 211. The third transflective layer 2152 is used to transmit quantum dot excitation light and reflect at least blue light.

Blue quantum dot layer 2151 includes quantum dot material, and blue quantum dot layer 2151 can absorb light smaller than its emission wavelength and emit blue light. The wavelength range of blue light emitted from blue quantum dot layer 2151 is relatively narrow. Illustratively, blue quantum dot layer 2151 emits light at a wavelength greater than (or equal to) 430nm and less than (or equal to) 470nm, and blue quantum dot layer 2151 absorbs light at a wavelength less than 470nm and emits light at a wavelength greater than (or equal to) 430nm and less than (or equal to) 470 nm.

As shown in fig. 7a, in the transmissive mode, the quantum dot excitation light M provided by the backlight module passes through the third transflective layer 2152 and then is emitted to the blue quantum dot layer 2151.

The blue quantum dot layer 2151 is excited by light emitted from the backlight 30 and emits blue light. Since blue quantum dot layer 2151 can emit light in all directions, or, alternatively, since blue quantum dot layer 2151 can emit light 360 °, or, alternatively, since blue quantum dot layer 2151 can emit light from any position on its surface, and the emitted light can be at any angle to the surface of blue quantum dot layer 2151. Thus, a portion of the blue light will be directed toward the liquid crystal layer 23, a portion of the blue light will be directed toward the third transflective layer 2152, the third transflective layer 2152 will reflect the portion of the blue light directed toward the third transflective layer 2152, and the reflected blue light will be directed toward the liquid crystal layer 23.

In the reflective mode, the backlight is off and ambient light N provides a source of light to the blue quantum dot layer 2151, as shown in fig. 7 a. The ambient light N irradiates the blue quantum dot layer 2151, after the blue quantum dot layer 2151 is excited by the light of the ambient light N with a wavelength smaller than that of the blue light and emits the blue light, a part of the blue light irradiates the liquid crystal layer 23, a part of the blue light irradiates the third transflective layer 2152, the third transflective layer 2152 reflects the part of the blue light irradiating the third transflective layer 2152, and the emitted blue light irradiates the liquid crystal layer 23.

As can be seen from the above, the quantum dot excitation light is used to excite red quantum dot layer 2131 to emit red light, green quantum dot layer 2141 to emit green light, and blue quantum dot layer 2151 to emit blue light.

It should be noted that, as for the distribution of the red sub-pixel unit 213, the green sub-pixel unit 214, and the blue sub-pixel unit 215, the conventional arrangement in the art can be referred to.

Red quantum dot layer 2131, green quantum dot layer 2141, and blue quantum dot layer 2151 each comprise quantum dot material, and the light emission characteristics of each layer are mainly determined by the quantum dot material and the quantum dot size.

Alternatively, red quantum dot layer 2131, green quantum dot layer 2141, or blue quantum dot layer 2151 may include: quantum dot materials, photoresists, diffusion particles, and coupling agents (e.g., quantum dot-photoresist coupling agents).

In addition, in order to scatter the backlight incident on the red, green, or blue quantum dot layers 2131, 2141, or 2151 to increase the viewing angle of the screen, light diffusion particles may be included in the corresponding quantum dot layers.

In some embodiments, as shown in fig. 7b, the array substrate 21 further includes a first wire grid polarizer layer 212 on a side of the plurality of spaced apart sub-pixel units away from the first substrate 21.

As shown in fig. 8, the first wire grid polarizing layer 212 includes a plurality of first polarizing units 2121, wherein the plurality of first polarizing units 2121 and the plurality of sub-pixel units arranged at intervals as shown in fig. 7b are arranged in a one-to-one opposite manner.

It will be appreciated by those skilled in the art that the wire Grid Polarizer (GP) is characterized by reflecting light polarized with a polarization direction parallel to the wire Grid and transmitting light polarized with a polarization direction perpendicular to the wire Grid. Accordingly, each of the first polarization units 2121 includes a plurality of wire grids parallel to each other. The term parallel is to be understood here as substantially parallel, since process tolerances are difficult to avoid, and therefore a routine understanding of the person skilled in the art should be followed.

Since the wavelength of the light emitted from the backlight assembly 30 of the transflective liquid crystal display 20 is the same wavelength when the array substrate 21 is applied to the transflective liquid crystal display 20, the structure of the wire grid suitable for the same wavelength is fixed. Therefore, the structure of each of the first polarization units 2121 of the first wire-grid polarizing layer 212 is the same.

Alternatively, the width of the slit between every two adjacent wire grids in the first polarization unit 2121 is the same, so as to ensure that polarized light with the same polarization direction can be transmitted.

Illustratively, the gap between two adjacent wire grids and the width of one wire grid form a wire grid period, and the width of one wire grid period is greater than (or equal to) 80nm and less than (or equal to) 200 nm. Optionally, the width of the period of the wire grid is 100nm, 120nm, 140nm, 160nm or 180 nm.

The width of the wire grid is about 30% -70% of the total wire grid period, alternatively the width of the wire grid is 40%, 50% or 60% of the total period.

The thickness of the first wire grid polarizing layer 212 is greater than (or equal to) 80nm and less than (or equal to) 300nm, and optionally, the thickness of the first wire grid polarizing layer 212 is 100nm, 150nm, 200nm or 250 nm.

In order to simplify the structure of the first wire grid polarizing layer 212, in some embodiments, as shown in fig. 8, the first wire grid polarizing layer 212 includes a plurality of first wires 21211 arranged in parallel, and the first wires 21211 extend from one side of the array substrate 21 to the opposite side.

From one side of the array substrate 21 to the opposite side, the array substrate 21 includes a plurality of first polarization units 2121, and a portion of each first wire 21211 located in each first polarization unit 2121 of the plurality of first polarization units 2121 is a wire grid corresponding to the first polarization unit 2121.

It should be noted that the first wire grid polarizer 212 shown in fig. 8 corresponds to 24 sub-pixel units, the arrangement of the 24 sub-pixel units is a matrix of four rows by six columns (4 × 6), each first wire 21211 extends from the first side 2125 to the second side 2126 of the first wire grid polarizer 212, and passes through 6 first polarization units 2121, and then a portion of each first wire 21211 located in each first polarization unit 2121 of the 6 first polarization units 2121 is a wire grid corresponding to the first polarization unit 2121. Referring to fig. 8, it will be readily appreciated that first side edge 2125 is opposite second side edge 2126.

As will be understood by those skilled in the art, the actually manufactured first wire grid polarizing layer 211 corresponds to all the sub-pixel units on the array substrate 21, that is, the first wire grid polarizing layer 212 includes the same number of first polarizing units 2121 as the sub-pixel units included in the array substrate 21, and the first polarizing units 2121 correspond to the sub-pixel units one to one.

Each of the first wires 21211 penetrates through a plurality of first polarizing units 2121 in the extending direction thereof, and a portion of each of the first wires 21211 penetrating through one of the first polarizing units 2121 constitutes one wire grid corresponding to the first polarizing unit 2121. Also taking fig. 8 as an example, that is, each of the first wirings 21211 is divided into 6 line segments in the first direction, each line segment serves as one wire grid corresponding to the first polarization unit 2121, and any adjacent wire grids are connected in the first direction.

In some embodiments, as shown in fig. 9, the first wire grid polarizing layer 212 includes M +1 third light-shielding strips 2123 extending along the first direction and N +1 fourth light-shielding strips 2124 extending along the second direction, in addition to the plurality of first polarizing units 2121.

The plurality of first polarization units 2121 includes M × N first polarization units 2121, and the arrangement structure of the M × N first polarization units 2121 is a matrix with M rows × N columns, the first direction is a row direction of the matrix, and the second direction is a column direction of the matrix. It should be appreciated that the first direction and the second direction are perpendicular to each other.

The grid surrounded by the M +1 third light-shielding strips 2123 and the N +1 fourth light-shielding strips 2124 includes M × N closed lattices, the M × N first polarization units 2121 are located in the M × N closed lattices one by one, and M and N are positive integers.

Alternatively, the M × N first polarization units 2121, the M +1 third light-shielding strips 2123, and the N +1 fourth light-shielding strips 2124 are integrated.

Each of the first polarization units 2121 includes a plurality of second wires 21212 arranged in parallel, and the second wires 21212 extend from one side of the first polarization unit 2121 to the opposite side to form a wire grid in the first polarization unit 2121.

Here, the gaps between two adjacent second wirings 21212 in each first polarization unit 2121 are equal.

On this basis, the material of the first wire grid polarizing layer 212 is a light shielding material, such as a metal material. Illustratively, the material of the first wire-grid polarizing layer 212 includes at least one of the following materials: aluminum (Al), copper (Cu), silver (Ag), gold (Au), and chromium (Cr).

In the array substrate 21, the number of the first polarization units 2121 is equal to the number of the sub-pixel units, and is M × N. The M × N sub-pixel units correspond to M × N closed cells surrounded by M +1 third light-shielding strips 2123 and N +1 fourth light-shielding strips 2124 one by one.

The first wire grid polarizer layer 212 illustrated in fig. 9 corresponds to 24 sub-pixel units, and the 24 sub-pixel units are arranged in a matrix of four rows by six columns (4 × 6).

That is, there is a row of sub-pixel units between every two adjacent third light-shielding bars 2123, and there is a column of sub-pixel units between every two adjacent fourth light-shielding bars 2124.

Therefore, the third light-shielding bar 2123 and the fourth light-shielding bar 2124 in the first wire grid polarizing layer 212 are used to prevent the primary light emitted by the adjacent sub-pixel units from mixing.

It should be noted that the widths of the third light-shielding strip 2123 and the fourth light-shielding strip 2124 may be equal or unequal, and the specific width is related to the spacing between adjacent sub-pixel units.

The first wire grid polarizing layer 212 includes M +1 third light-shielding strips 2123 extending in the first direction and N +1 fourth light-shielding strips 2124 extending in the second direction in addition to the plurality of first polarizing units 2121, and M × N closed cells are surrounded by the M +1 third light-shielding strips 2123 and the N +1 fourth light-shielding strips 2124, and the M × N first polarizing units 2121 are located in the M × N closed cells one by one. On the one hand, the array substrate 21 may not need to be provided with a light shielding matrix separately. On the other hand, when the first wire grid polarizing layer 212 is made of a metal material, the part of the quantum dots which are excited and emitted to the first wire grid polarizing layer 212 and do not pass through the first wire grid polarizing layer 212 will be reflected to the quantum dot layer by the first wire grid polarizing layer 212, and converted into light with the polarization direction parallel to the transmission axis direction of the first wire grid polarizing layer 212 and emitted again, so that the utilization rate of the light can be improved.

In some embodiments, as shown in fig. 10, the first wire-grid polarizing layer 212 includes a plurality of first polarizing units 2121 arranged in an array.

In the array substrate 21, the number of the first polarization units 2121 is equal to the number of the sub-pixel units, and is M × N. The first wire grid polarizer layer 212 illustrated in fig. 10 corresponds to 24 sub-pixel units, and the 24 sub-pixel units are arranged in a matrix of four rows by six columns (4 × 6).

On this basis, the polarization direction of the first wire grid polarization layer 212 and the polarization direction of the upper polarization layer 222 may be parallel or perpendicular.

Optionally, when the polarization direction of the first wire grid polarizing layer 212 is parallel to the polarization direction of the upper polarizing layer 222, the natural light becomes linearly polarized light after passing through the first wire grid polarizing layer 212, and when no voltage is applied, the linearly polarized light is twisted by 90 ° after being emitted to the liquid crystal layer 23, and then emitted to the upper polarizing layer 222, the polarization direction of the linearly polarized light is perpendicular to the polarization direction of the upper polarizing layer 222 and is absorbed by the upper polarizing layer 222, so that the transflective liquid crystal display panel 20 displays a black state, and this mode of displaying a black state when no voltage is applied is referred to as a "normally black mode".

Alternatively, in the case that the polarization direction of the first wire-grid polarizing layer 212 is perpendicular to the polarization direction of the upper polarizing layer 222, the natural light is linearly polarized after passing through the first wire-grid polarizing layer 212, and when no voltage is applied, the linearly polarized light is twisted by 90 ° after being incident on the liquid crystal layer 23, and then is incident on the upper polarizing layer 222, the polarization direction of the linearly polarized light is parallel to the polarization direction of the upper polarizing layer 222 and is emitted from the upper polarizing layer 222, so that the transflective liquid crystal display panel 20 displays a white state, and this mode of displaying a white state when no voltage is applied is referred to as a "normally white mode".

For convenience of description, the embodiment of the present application is described by taking an example that the polarization direction of the first wire grid polarization layer 212 and the polarization direction of the upper polarization layer 222 are perpendicular.

The display principle of the transflective liquid crystal display 20 is as follows: as shown in fig. 11a (it should be noted that fig. 11a is also a sectional view along a-a' direction in fig. 6 a), in the red sub-pixel unit 213 in the transmission mode, the quantum dot excitation light M emitted from the backlight module passes through the first transflective layer 2132 and enters the red quantum dot layer 2131, and the red quantum dot layer 2131 emits red light under excitation of the quantum dot excitation light M. In the green sub-pixel unit 214 in the transmissive mode, the quantum dot excitation light M passes through the second transflective layer 2142 and enters the green quantum dot layer 2141, and the green quantum dot layer 2141 emits green light under excitation of the quantum dot excitation light M. In the blue sub-pixel unit 215 in the transmissive mode, the quantum dot excitation light M enters the blue quantum dot layer 2151 through the third transflective layer 2152, and the blue quantum dot layer 2151 emits blue light under excitation of the quantum dot excitation light M. It should be noted that the red light emitted from the red sub-pixel unit 213, the green light emitted from the green sub-pixel unit 214, and the blue light emitted from the blue sub-pixel unit 215 constitute the tricolor light of the transflective liquid crystal display panel 20.

After the three primary color lights are emitted to the first wire grid polarizing layer 212, the lights with the polarization direction perpendicular to the wire grid arrangement direction of the first wire grid polarizing layer 212 pass through the first wire grid polarizing layer 212 to form first polarized lights.

Since the liquid crystal molecules in the liquid crystal layer 23 have a polarization property with respect to polarized light, a specific molecular arrangement direction may change the polarization direction of the polarized light. Therefore, when the first polarized light is incident on the liquid crystal layer 23, the liquid crystal layer 23 rotates the first polarized light to form the second polarized light.

The second polarized light is directed to the upper polarizing layer 222, and when the polarization direction of the second polarized light is perpendicular to the polarization direction of the upper polarizing layer 222, the second polarized light is absorbed by the upper polarizing layer 222, and the second polarized light cannot pass through the upper polarizing layer 222, and no light exits.

When the polarization direction of the second polarized light is parallel to the polarization direction of the upper polarization layer 222, the second polarized light can pass through the upper polarization layer 222, and the light intensity of the emergent light is strongest at this time.

The driving signals are transmitted to the respective sub-pixel regions through the pixel circuits on the array substrate 21, and the deflection direction of the liquid crystal molecules in the respective sub-pixel regions is changed to change the polarization direction of the second polarized light in the respective sub-pixel regions. By controlling the included angle between the second polarized light and the upper polarized layer 222, the amount of light emitted from the upper polarized layer 222 in each sub-pixel region can be controlled to display different gray-scale images.

As shown in fig. 11b (it should be appreciated that fig. 11b is also a cross-sectional view along a-a' in fig. 6 a), in the reflective mode, the backlight is turned off, the quantum dot excitation light is not provided to the transflective liquid crystal display panel 20, and the ambient light N provides the light source to the transflective liquid crystal display panel 20. The ambient light N passes through the upper polarizing layer 222 on the counter substrate 22 to form third polarized light.

Since the liquid crystal molecules in the liquid crystal layer 23 have a polarization property with respect to polarized light, a specific molecular arrangement direction may change the polarization direction of the polarized light. Therefore, when the third polarized light is incident on the liquid crystal layer 23, the liquid crystal layer 23 rotates the third polarized light to form fourth polarized light.

It should be noted that the pixel circuit on the array substrate 21 transmits a driving signal to each sub-pixel region to change the deflection direction of the liquid crystal molecules in each sub-pixel region, and further controls the included angle between the fourth polarized light and the polarization direction of the first wire grid polarization layer 212, so as to control the intensity of the fifth polarized light formed after the fourth polarized light passes through the first wire grid polarization layer 212.

For the red subpixel unit 213, the fifth polarized light transmitted through the first wire grid polarizing layer 212 enters the red quantum dot layer 2131, and the red quantum dot layer 2131 emits red light under excitation of the fifth polarized light. For the green photonic pixel cell 214, light of the fifth polarization transmitted through the first wire grid polarizing layer 212 enters the green quantum dot layer 2141, and the green quantum dot layer 2141 emits green light under excitation of the fifth polarization. For the blue subpixel unit 215, the fifth polarized light transmitted through the first wire grid polarizing layer 212 enters the blue quantum dot layer 2151, and the blue quantum dot layer 2151 emits blue light under excitation of the fifth polarized light. The red light emitted from the red sub-pixel unit 213, the green light emitted from the green sub-pixel unit 214, and the blue light emitted from the blue sub-pixel unit 215 constitute the tricolor light of the transflective liquid crystal display panel 20.

It is understood that, since the quantum dots have a function of converting linearly polarized light into unpolarized light (depolarization characteristic), in this case, red light, green light, and blue light are unpolarized light.

The red light is reflected back to the red quantum dot layer 2131 by the first transflective layer 2132 and then directed to the first wire grid polarizer layer 212, the green light is reflected back to the green quantum dot layer 2141 by the second transflective layer 2142 and then directed to the first wire grid polarizer layer 212, and the blue light is reflected back to the blue quantum dot layer 2151 by the third transflective layer 2152 and then directed to the first wire grid polarizer layer 212. The first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 only change the optical path, and do not change the polarization direction of light, so that the reflected red light, green light, and blue light remain unpolarized light.

The red, green, and blue light pass through the first wire grid polarizer layer 212, forming sixth polarized light.

Since the liquid crystal molecules in the liquid crystal layer 23 have a polarization property with respect to polarized light, a specific molecular arrangement direction may change the polarization direction of the polarized light. Therefore, when the sixth polarized light is incident on the liquid crystal layer 23, the liquid crystal layer 23 rotates the sixth polarized light to form seventh polarized light.

The seventh polarized light is directed to the upper polarizing layer 222, and when the polarization direction of the seventh polarized light is perpendicular to the polarization direction of the upper polarizing layer 222, the seventh polarized light is absorbed by the upper polarizing layer 222, and the seventh polarized light cannot pass through the upper polarizing layer 222, and no light exits.

When the polarization direction of the seventh polarized light is parallel to the polarization direction of the upper polarization layer 222, the seventh polarized light can pass through the upper polarization layer 222, and the light intensity of the emergent light is strongest at this time.

The pixel circuit on the array substrate 21 transmits a driving signal to each sub-pixel region, and changes the deflection direction of the liquid crystal molecules in each sub-pixel region to change the polarization direction of the seventh polarized light in each sub-pixel region. By controlling the included angle between the seventh polarized light and the upper polarized layer 222, the amount of light emitted from the upper polarized layer 222 in each sub-pixel region can be controlled to display different gray-scale images.

In the above-mentioned array substrate 21 provided by the present application, on one hand, in the transmissive mode, since the red quantum dot layer 2131, the green quantum dot layer 2141 and the blue quantum dot layer 2151 can be excited by the quantum dot excitation light to emit red light, green light and blue light, respectively, and the red light, the green light and the blue light can be directly emitted as display light, the light loss is small. If the color filter layer is a structure formed by mixing a polymer material and an organic dye, only one of red, green and blue lights in the backlight will transmit through the color filter layer, so that the transmittance is only 1/3, and the light intensity of at least 2/3 is lost. Based on this, in the array substrate 21 provided in the present application, since the red, green, and blue light emitted from the red quantum dot layer 2131, the green quantum dot layer 2141, and the blue quantum dot layer 2151 can be directly emitted, almost all light can be used for display without considering light loss, and a portion of light is not filtered out. Therefore, the light emitting efficiency is high, the light emitting efficiency of the transflective liquid crystal display 20 can be obviously improved (by about 90%), and the power consumption of the terminal is reduced.

In the reflective mode, red quantum dot layer 2131, green quantum dot layer 2141, and blue quantum dot layer 2151 can be excited to emit light of three primary colors of red, green, and blue by ambient light, red quantum dot layer 2131 can absorb all light of ambient light with a wavelength smaller than the wavelength of the red light emission peak, green quantum dot layer 2141 can absorb all light of ambient light with a wavelength smaller than the wavelength of the green light emission peak, and blue quantum dot layer 2151 can absorb all light of ambient light with a wavelength smaller than the wavelength of the blue light emission peak. When the color filter layer is a structure formed by mixing a high polymer material and an organic dye, the red filter layer can only absorb and utilize red light, the green filter layer can only absorb and utilize green light, and the blue filter layer can only absorb and utilize blue light. Therefore, the quantum dot layer in the array substrate 21 provided by the present application absorbs more ambient light, and the ambient light that is not absorbed and utilized is less, so that the utilization rate of the ambient light can be greatly improved, and the display brightness and the contrast of the transflective lcd 20 can be improved by more than 50%.

On the other hand, since the quantum dot material has a narrow emission wavelength and high color purity, the color gamut that can be displayed by the red quantum dot layer 2131, the green quantum dot layer 2141, and the blue quantum dot layer 2151 exceeds the standard color triangle in the color gamut coordinates due to the emission of light with high color purity, and the color gamut is significantly increased. Therefore, when the array substrate 21 of the present application is applied to the transflective liquid crystal display 20, the display color gamut of the transflective liquid crystal display 20 can be increased by more than 50%, so that the transflective liquid crystal display 20 has richer display colors and brighter image quality.

In another aspect, the present application uses the thinner first wire grid polarizing layer 212 to replace the traditional thicker lower polarizer, which can reduce the material cost and the thickness of the transflective lcd 20 (by about 50um or more), so that the transflective lcd 20 is light and thin.

In another aspect, in the prior art, a terminal having a transmissive mode and a reflective mode implements gray scale display by matching a lower polarization layer, a phase retardation wave plate, a liquid crystal layer, and an upper polarization layer. In the application, gray scale display can be realized by matching the first grid polarizing layer 212, the upper polarizing layer 222 and the liquid crystal layer 23, and the arranged film layer has a smaller structure, so that light loss can be reduced. Further, in the present application, in the black state (the polarization direction of the polarized light transmitted through the liquid crystal layer 23 is perpendicular to the polarization direction of the upper polarization layer 222), any wavelength of visible light cannot transmit through the upper polarization layer 222, and the phenomenon of light leakage in the black state due to the effect of the phase retardation wave plate only on the light with a specific wavelength does not occur, and the contrast ratio can be improved.

In another aspect, although red, green, and blue light emitted from the red, green, and blue quantum dot layers 2131, 2141, and 2151 can be emitted in any direction, the portion of the light emitted to the first, second, and third transflective layers 2132, 2142, and 2152 is reflected back to the quantum dot layers and then to the liquid crystal layer 23. Therefore, the utilization rate of light emitted by the quantum dots can be improved, and the brightness and the contrast of the transflective liquid crystal display screen 20 can be improved.

In another aspect, the red, green and blue light respectively emitted from the red, green and blue quantum dot layers 2131, 2141 and 2151 after excitation are directed to the first wire grid polarizer layer 212. since the first wire grid polarizer layer 212 also has a reflective effect, the light that does not pass through the first wire grid polarizer layer 212 is reflected back to the quantum dot layer by the first wire grid polarizer layer 212 and is not absorbed. Since the quantum dot has a depolarizing property to linearly polarized light, the light reflected back to the quantum dot layer is converted into circularly polarized light by the quantum dot layer and then emitted to the first wire grid polarizing layer 212 again. The light with the polarization direction parallel to the light transmission axis direction of the first grid polarization layer 212 in the circularly polarized light can be emitted, and the utilization rate of the light emitted by the quantum dots can be improved.

The following describes the structure of the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 by way of a few examples.

Example 1

As shown in fig. 12a (fig. 12a is also a cross-sectional view along a-a' direction in fig. 6 a), the first and second transflective layers 2132 and 2142 are red-green light-reflecting layers for reflecting red light and green light, and the material of the red-green light-reflecting layers is a light-transmitting material.

The red and green light reflection increasing layers can be manufactured based on the Bragg reflection principle, materials with different refractive indexes are alternately deposited layer by utilizing the processes of chemical vapor deposition or magnetron sputtering and the like, the number of deposited materials, the number of deposited layers and the deposited thickness can be optimized according to the wavelength of blue light emitted by the backlight module 30 until the blue light with the wavelength has the maximum transmittance, and the red light and the green light emitted by the red quantum dot layer 2131 and the green quantum dot layer 2141 have the maximum reflectance.

It should be noted that, silica and titania with large refractive index difference can be selected to prepare the red-green light reflection increasing layer. Wherein, silicon dioxide and titanium dioxide are arranged alternately, and the thickness and the number of layers of the silicon dioxide and titanium dioxide film layers are optimized according to the wavelength of the backlight emitted by the backlight module 30.

In addition, the third transflective layer 2152 is a light reflective layer for reflecting red, green, and blue light. The material of the light reflecting layer can be a light shading material. The light reflecting layer includes at least one via 21521, and the via 21521 is configured to transmit quantum dot excitation light.

It is understood that the size and number of the through holes 21521 can be adjusted according to the brightness ratio of the red sub-pixel unit 213, the green sub-pixel unit 214, and the blue sub-pixel unit 215 in the transmissive mode.

As shown in fig. 12a, the light-reflective layer may be provided with one through-hole 21521, or as shown in fig. 12b (fig. 12b is also a cross-sectional view taken along a-a' direction in fig. 6 a), the light-reflective layer may be provided with a plurality of through-holes 21521. The location of the via 21521 on the reflective layer is not limited. The material of the light reflecting layer may be, for example, metal.

Here, the red and green light reflection increasing layer may transmit blue light, reflect red light and green light. The light reflecting layer may reflect light of all wavelength bands.

Further, as shown in fig. 12c (fig. 12c is also a cross-sectional view along a-a' in fig. 6 a), the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 may also be joined together.

The red and green light reflection increasing layer does not affect the transmission of blue light and can reflect red light and green light, so that the utilization rate of the red quantum dot layer 2131 and the green quantum dot layer 2141 to backlight can be improved.

In some embodiments, the first transflective layer 2132 and the second transflective layer 2142 are a unitary structure, as shown in fig. 13 (fig. 13 is also a cross-sectional view along a-a' in fig. 6 a).

It is understood that the first transflective layer 2132 and the second transflective layer 2142 are both red and green light reflection increasing layers, and the first transflective layer 2132 and the second transflective layer 2142 are an integral structure. Thus, as shown in fig. 14 (fig. 14 is also a cross-sectional view along a-a' direction in fig. 6 a), when the red-green light reflection increasing layer includes a plurality of film layers, each of the film layers has an integral structure.

Here, the integral structure refers to a structure integrally formed in the manufacturing process, and if the first transflective layer 2132 and the second transflective layer 2142 are spliced together, the integral structure is not included herein.

The first transflective layer 2132 and the second transflective layer 2142 are formed as an integral structure, and the first transflective layer 2132 and the second transflective layer 2142 can be formed simultaneously, so that the requirement for manufacturing accuracy can be simplified.

Example two

Example two is the same as example one in that: the third transflective layer 2152 is a light-reflective layer.

Example two differs from example one in that:

the first transflective layer 2132 is a red light reflection increasing layer, and the second transflective layer 2142 is a green light reflection increasing layer.

The red light reflection increasing layer is used for reflecting red light, and the material of the red light reflection increasing layer is a light-transmitting material. The green light reflection increasing layer is used for reflecting green light, and the material of the green light reflection increasing layer is a light-transmitting material.

The red light reflection increasing layer and the green light reflection increasing layer can be manufactured based on the Bragg reflection principle respectively, materials with different refractive indexes are alternately deposited layer by utilizing the processes of chemical vapor deposition or magnetron sputtering and the like, and the deposition materials, the number of the deposition layers and the deposition thickness can be optimized according to the wavelength of blue light emitted by the backlight module 30. It is noted that the red reflection increasing layer has the greatest transmittance for blue light of that wavelength and the greatest reflectance for red light emitted by the red quantum dot layer 2131. Similarly, the green light reflection increasing layer has the maximum transmittance for blue light of that wavelength and the maximum reflectance for green light emitted from green quantum dot layer 2141.

For example, the red light reflection increasing layer and the green light reflection increasing layer may be prepared by selecting silica and titania having a large difference in refractive index, the silica and the titania may be alternately arranged, and the thickness and the number of layers of the silica and the titania film layer may be optimized according to the wavelength of the backlight emitted from the backlight module 30 and the wavelength of the light to be reflected.

The reflection increasing film that reflects only one color of light is thinner than the reflection increasing film that reflects a plurality of colors of light, so the transflective liquid crystal display panel 20 can be made thinner by the first transflective layer 2132 being a red light reflection increasing layer and the second transflective layer 2142 being a green light reflection increasing layer.

Example three

Example three is the same as example one in that: the third transflective layer 2152 is a light-reflective layer.

Example three differs from example one in that:

as shown in fig. 15 (fig. 15 is also a cross-sectional view along a-a' direction in fig. 6 a), the first transflective layer 2132 is a red light reflection increasing layer, and the second transflective layer 2142 is a light reflecting layer.

The reflective layer can be a structure of one film layer, and the reflection-increasing layer at least comprises two film layers with different refractive indexes, so that the preparation cost of the reflective layer is lower than that of the reflection-increasing layer, and the cost can be reduced by setting the second transflective layer 2142 as the reflective layer. In addition, a part of the light in the backlight that does not pass through the through hole 21521 is reflected back to the backlight module 30 by the second transflective layer 2142, is emitted to the second transflective layer 2142 again after the light path is changed, and is then emitted from the through hole 21521, so that the utilization rate of the backlight is high.

In some embodiments, the second transflective layer 2142 and the third transflective layer 2152 are a unitary structure, as shown in fig. 16 (fig. 16 is also a cross-sectional view along a-a' in fig. 6 a).

The second transflective layer 2142 and the third transflective layer 2152 are integrally formed, and the second transflective layer 2142 and the third transflective layer 2152 can be simultaneously formed, thereby reducing process requirements.

Example four

Example four is the same as example one in that: the third transflective layer 2152 is a light-reflective layer.

Example four differs from example one in that:

as shown in fig. 17 (fig. 17 is also a cross-sectional view along a-a' in fig. 6 a), the first transflective layer 2132 is a light reflecting layer and the second transflective layer 2142 is a green light reflecting layer.

The reflecting layer is lower in preparation cost than the reflection increasing layer, so that the cost can be reduced by arranging the first transflective layer 2132 as the reflecting layer. In addition, a part of the light in the backlight that does not pass through the through hole 21521 is reflected back to the backlight module 30 by the first transflective layer 2132, is emitted to the first transflective layer 2132 again after the light path is changed, and is emitted from the through hole 21521, so that the utilization rate of the backlight is high.

Example five

Example five is the same as example one in that: the third transflective layer 2152 is a light-reflective layer.

Example five differs from example one in that:

as shown in fig. 18 (fig. 18 is also a cross-sectional view along a-a' in fig. 6 a), the first transflective layer 2132 and the second transflective layer 2142 are also light reflecting layers.

It is understood that the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 may include different numbers of through holes 21521, and the aperture of the through holes 21521 may also be different.

Since the reflective layer has a lower manufacturing cost than the reflection increasing layer, the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 are reflective layers, which simplifies the manufacturing process.

In some embodiments, the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 are a unitary structure, as shown in fig. 19 (fig. 19 is also a cross-sectional view along a-a' in fig. 6 a).

The first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 are integrated into a single structure, and the second transflective layer 2142 and the third transflective layer 2152 can be formed simultaneously, thereby reducing the process requirements.

In addition, after the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 are connected into an integral structure, the portion between the adjacent sub-pixel units can reflect the backlight that does not pass through the reflective layer back to the backlight module 30 for reuse, so as to improve the utilization rate of the backlight.

Example six

Example six differs from examples one to five in that:

the wavelength of the quantum dot excitation light is smaller than that of the blue light, for example, the wavelength of the quantum dot excitation light is smaller than 430 nm.

The third transflective layer 2152 is a blue light reflection increasing layer for transmitting quantum dot excitation light and reflecting blue light, and is made of a light transmitting material.

The blue light reflection increasing layer can be manufactured based on the bragg reflection principle, materials with different refractive indexes are alternately deposited layer by utilizing the processes of chemical vapor deposition or magnetron sputtering and the like, and the deposition materials, the number of deposition layers and the deposition thickness can be optimized according to the wavelength of the blue light emitted by the backlight module 30 until the blue light reflection increasing layer has the maximum transmittance to the quantum dot excitation light with the wavelength and has the maximum reflectance to the blue light emitted by the blue quantum dot layer 2151.

For example, silica and titania with large refractive index difference may be selected to prepare the blue light reflection increasing layer, the silica and titania are alternately arranged, and the thickness and number of layers of the silica and titania film layers are optimized according to the wavelength of the backlight emitted by the backlight module 30 and the wavelength of the light to be reflected.

For convenience of description, in the following embodiments of the present application, the first transflective layer 2132 and the second transflective layer 2142 are red/green light reflection increasing layers, the first transflective layer 2132 and the second transflective layer 2142 are discrete structures, and the third transflective layer 2152 is a light reflecting layer.

On the basis, after the ambient light N is emitted to the first wire grid polarizing layer 212, a part of the light is directly reflected out of the opposite substrate 22 by the surface of the first wire grid polarizing layer 212 close to the liquid crystal layer 23, and the part of the light is interference light, which affects the display effect.

Based on this, in order to reduce the reflection of the ambient light by the first wire-grid polarizing layer 212, as shown in fig. 20a, in some embodiments, the surface of the first wire-grid polarizing layer 212 away from the first substrate 211 is provided with a plurality of concave points 2122.

Fig. 20a illustrates the first wire-grid polarizing layer 212 shown in fig. 8, and a plurality of pits 2122 are provided on the surface of each first wiring 21211 away from the first substrate 211.

The first wire-grid polarizing layer 212 may be configured as shown in fig. 20b, and fig. 20b illustrates the first wire-grid polarizing layer 212 shown in fig. 9, in which a plurality of pits 2122 are provided on the surfaces of each of the second wire 21212, the third light-shielding strip 2123, and the fourth light-shielding strip 2124, which are away from the first substrate 211.

As shown in fig. 20c, after the ambient light N passes through the upper substrate 22, the ambient light N is directly reflected when it strikes the surface of the first wire-grid polarizing layer 212 away from the first substrate 211. However, if the concave point 2122 is disposed on the surface of the first wire grid polarizer 212, which is far away from the first substrate 211, of the ambient light N passing through the first wire grid polarizer 212, the concave point 2122 changes the optical path, so that a part of the light that should be reflected to the liquid crystal layer 23 is reflected to other areas, or is totally reflected in the concave point 2122 and does not emit to the liquid crystal layer 23. Therefore, the reflection of the first wire grid polarizing layer 212 to the ambient light can be reduced, and the display effect can be improved.

It is understood that, as shown in fig. 20c (fig. 20c is a cross-sectional view taken along the direction B-B' in fig. 20 a), in order to improve the polarizing effect of the first wire-grid polarizing layer 212, the depth h2 of the pits 2122 is smaller than the thickness h1 of the first wire-grid polarizing layer 212.

The concave point 2122 may be, for example, a groove, and of course, the shape of the groove is not limited, and may be, for example, a circular groove, a rectangular groove, or the like.

The arrangement of the plurality of pits 2122 is not limited, and the structure of the plurality of pits 2122 may not be identical.

As shown in fig. 21a, in some embodiments, the surface of the first wire grid polarizing layer 212 remote from the first substrate 211 is provided with a light absorbing layer 216; an orthographic projection of the light absorbing layer 216 on the first substrate 211 is within an orthographic projection of the first wire grid polarizing layer 212 on the first substrate 211.

In some embodiments, as shown in FIG. 21b (FIG. 21b is a cross-sectional view taken along the direction C-C' in FIG. 21 a), the light absorbing layer 216 coincides with the first wire grid polarizing layer 212.

In order to improve the light absorption effect of the light absorbing layer 216, the area of the light absorbing layer 216 is increased so that the light absorbing layer 216 completely covers the surface of the first wire-grid polarizing layer 212 away from the first substrate 211.

The light absorbing layer 216 may be made of a material having a light absorbing function, such as a graphite layer.

By providing the light absorbing layer 216 on the surface of the first wire-grid polarizing layer 212 away from the first substrate 211, in the reflective mode, a part of the ambient light N that should have been reflected to the liquid crystal layer 23 can be absorbed and not be directed to the liquid crystal layer 23. Therefore, the reflection of the first wire grid polarizing layer 212 to the ambient light N can be reduced, and the display effect can be improved.

In some embodiments, as shown in fig. 22 (fig. 22 is also a cross-sectional view along a-a' direction in fig. 6 a), the array substrate 21 further includes a flat layer 217, the flat layer 217 is located on a side of the first wire grid polarizing layer 212 facing the first substrate 211, and the red, green, and blue quantum dot layers 2131, 2141, and 2151 are all located on a side of the flat layer 217 away from the first wire grid polarizing layer 212.

For example, the planarization layer 217 is disposed on the surface of the first wire-grid polarizing layer 212 facing the first substrate 211.

Here, in order to ensure the preparation effect of the first wire-grid polarizing layer 212 and avoid process errors of the first wire-grid polarizing layer 212 caused by uneven film layers, the flat layer 217 is disposed on one side of the first wire-grid polarizing layer 212 facing the first substrate 211.

In some embodiments, as shown in fig. 23a (fig. 23a is also a cross-sectional view taken along a-a' direction in fig. 6 a), the array substrate 21 further includes a first light shielding matrix 218, the first light shielding matrix 218 is located on a side of the first wire grid polarizing layer 212 close to the first substrate 211, and the first transflective layer 2132, the second transflective layer 2142, and the third transflective layer 2152 are all located on a side of the first light shielding matrix 218 close to the first substrate 211.

As shown in fig. 23b, the first light shielding matrix 218 includes a plurality of first light shielding bars 2181 extending in a first direction and a plurality of second light shielding bars 2182 extending in a second direction.

The arrangement structure of the multiple sub-pixel units arranged at intervals is a matrix with M rows by N columns, the first direction is the row direction of the sub-pixel unit matrix, and the second direction is the column direction of the sub-pixel unit matrix; m and N are both positive integers.

Each first light-shielding strip 2181 is located between two adjacent rows of sub-pixel units in the matrix in which the plurality of sub-pixel units are arranged at intervals, and each second light-shielding strip 2182 is located between two adjacent columns of sub-pixel units in the matrix in which the plurality of sub-pixel units are arranged at intervals.

Here, the first light-shielding bar 2181 and the second light-shielding bar 2182 are used to prevent the primary light emitted by the adjacent sub-pixel units from mixing.

In some embodiments, as shown in fig. 23a, the surface of first light blocking matrix 218 remote from first substrate 211 is coplanar with the surface of red quantum dot layer 2131 remote from first substrate 211, the surface of green quantum layer 2141 remote from first substrate 211, and the surface of blue quantum dot layer 2151 remote from first substrate 211.

This ensures that the first light-shielding matrix 218 can completely shield the light of the adjacent quantum dot layer.

If the first light-shielding matrix 218 is formed on the array substrate 21, a similar structure need not be formed on the counter substrate 22 disposed opposite to the array substrate 21. In contrast, if a structure similar to the first light shielding matrix 218 has been formed on the counter substrate 22 and functions the same, the first light shielding matrix 218 may not be formed on the array substrate 21.

Based on the above, the following provides some examples to explain the structure of the transflective liquid crystal display panel 20 provided in the embodiments of the present application.

Example seven

As shown in fig. 24, the array substrate 21 and the counter substrate 22 provided opposite to each other in the transflective liquid crystal display panel 20 and the liquid crystal layer 23 provided between the array substrate 21 and the counter substrate 22 are fixed by adhesion.

The array substrate 21 includes a first substrate 211, a first wire grid polarizing layer 212, and a plurality of sub-pixel units disposed at intervals between the first substrate 211 and the first wire grid polarizing layer 212.

The arrangement structure of the multiple sub-pixel units arranged at intervals is a matrix with M rows by N columns, the first direction is the row direction of the sub-pixel unit matrix, the second direction is the column direction of the sub-pixel unit matrix, and M and N are positive integers.

As shown in fig. 8, 9 or 10, the first wire grid polarizing layer 212 includes a plurality of first polarizing units 2121, and the plurality of first polarizing units 2121 are disposed opposite to the plurality of sub-pixel units disposed at intervals in a one-to-one manner.

As shown in fig. 24, the plurality of sub-pixel units arranged at intervals include a red sub-pixel unit 213, a green sub-pixel unit 214, and a blue sub-pixel unit 215.

The red photonic pixel unit 213 includes a red quantum dot layer 2131 and a first transflective layer 2132, which are stacked, the first transflective layer 2132 being located between the red quantum dot layer 2131 and the first substrate 211. The first transflective layer 2132 is for transmitting blue light and reflecting at least red light.

The green photonic pixel cell 214 includes a green quantum dot layer 2141 and a second transflective layer 2142, which are stacked, the second transflective layer 2142 being located between the green quantum dot layer 2141 and the first substrate 211. The second transflective layer 2142 serves to transmit blue light and reflect at least green light.

Blue photonic pixel cell 215 includes a blue quantum dot layer 2151 and a third transflective layer 2152 disposed in a stack, with third transflective layer 2152 being located between blue quantum dot layer 2151 and first substrate 211. The third transflective layer 2152 is configured to transmit blue light and reflect at least blue light.

Red and green quantum dot layers 2131 and 2141 and blue quantum dot layer 2151 each comprise quantum dot material, photoresist and necessary additives. Essential additives include, but are not limited to, diffusion particles and quantum dot-photoresist coupling agents.

The size of the quantum dots in the quantum dot material is nano-scale, and the quantum dot material can be selected from one or more of the following materials: cadmium sulfide (CdS), cadmium selenide (CdSe), cadmium telluride (CdTe), zinc oxide (ZnO), zinc selenide (ZnSe), zinc telluride (ZnTe), zinc sulfide (ZnS), gallium arsenide (GaAs), gallium phosphide (GaP), gallium antimonide (GaSb), mercury sulfide (HgS), mercury selenide (HgSe), mercury telluride (HgTe), indium arsenide (InAs), indium phosphide (InP), indium antimonide (InSb), aluminum arsenide (AlAs), copper indium sulfide (CuInS), copper indium selenide (CuInSe), aluminum antimonide (AlSb), carbon quantum dots, and graphene quantum dots.

The emission spectrum of quantum dots can be controlled by changing the size of the quantum dots, i.e., the sizes of the quantum dots in red and green quantum dot layers 2131 and 2141 and blue quantum dot layer 2151 are different, so that red and green quantum dot layers 2131 and 2141 and blue quantum dot layer 2151 can emit light of different colors.

Of course, the materials of the quantum dots include, but are not limited to, the materials listed above, and other materials having the same or similar properties to those described above may also be applied. Taking ZnS quantum dots as an example, the size of red light emitting quantum dots is mainly about 9-10nm, the size of green light emitting quantum dots is about 7nm, and the size of blue light emitting quantum dots is about 5-7 nm.

For example, red, green, and blue quantum dot photoresists may be successively exposed to form red, green, and blue quantum dot layers 2131, 2141, and 2151, respectively. Alternatively, the red quantum dot layer 2131, the green quantum dot layer 2141, and the blue quantum dot layer 2151 are formed by an inkjet printing process.

The first transflective layer 2132 and the second transflective layer 2142 are red and green light reflecting layers, the first transflective layer 2132 and the second transflective layer 2142 are discrete structures, and the red and green light reflecting layers are used for reflecting red light and green light and transmitting blue light.

The third transflective layer 2152 is a reflective layer for reflecting blue light and for transmitting blue light.

The red and green light reflection increasing layer is manufactured based on the Bragg reflection principle. The materials with different refractive indexes are alternately deposited layer by utilizing the processes of chemical vapor deposition, magnetron sputtering and the like, so that the red and green light reflection increasing layer is formed. The deposition material, the number of deposition layers, and the deposition thickness may be optimized according to the emission wavelength of the backlight module 30 until the maximum transmittance is obtained for the backlight with the emission wavelength, and the maximum reflectivities are obtained for the red light and the green light emitted from the red quantum dot layer 2131 and the green quantum dot layer 2141.

The array substrate 21 further includes a flat layer 217, the flat layer 217 is located on a side of the first wire grid polarizing layer 212 facing the first substrate 211, and the red, green and blue quantum dot layers 2131, 2141 and 2151 are all located on a side of the flat layer 217 away from the first wire grid polarizing layer 212.

The material of the flat layer 217 may be a resin material having a large number of polar bonds, and the flat layer 217 is required to have excellent light transmittance. Thus, polar linkages may include hydroxyl, carboxyl, carbonyl, ether linkages, isocyanate, and urethane groups. For example, the resin material containing more polar bonds includes epoxy resin, phenol resin, urea resin, acrylic resin, polyvinyl alcohol, polyurethane, rubber, vinyl acetate and a copolymer thereof, polystyrene and a copolymer thereof, silicone, epoxy phenol resin, and the like.

The array substrate 21 further includes the first light-shielding matrix 218, the first light-shielding matrix 218 is disposed on the first wire grid polarizer layer 212 near the first substrate 211, and the red reflector 2132, the green reflector 2142, and the blue reflector 2152 are disposed on the first light-shielding matrix 218 near the first substrate 211.

For example, a black matrix photoresist may be exposed to form the first light-shielding matrix 218. Alternatively, the first light-shielding matrix 218 is fabricated using an inkjet printing process.

The array substrate 21 further includes a first alignment layer 219, and the first alignment layer 219 is disposed near the liquid crystal layer 23 and used for inducing liquid crystal molecules in the liquid crystal layer 23 to be aligned in a specific direction.

The material of the first alignment layer 219 may be, for example, one of polyimide, polyvinyl alcohol, polyester, epoxy resin, polyurethane, and polysilane polystyrene, and after curing and directional rubbing or photo-alignment treatment, the liquid crystal molecules have a specific arrangement direction, the transmittance of the alignment layer 219 is greater than 90%, and the thickness of the alignment layer 219 is about 50 to 200 nm. For example, the alignment layer 219 has a thickness of 100nm or 150 nm.

The array substrate 21 includes a common electrode 26 and a pixel electrode 27 in addition to a plurality of sub-pixel units arranged at intervals. The liquid crystal molecules in the liquid crystal layer 23 are used to be deflected by being driven by the common electrode 26 and the pixel electrode 27.

The common electrode 26 and the pixel electrode 27 are both disposed on the first wire grid polarizing layer 212 far from the first substrate 211, and the common electrode 26 is disposed close to the first substrate 211 opposite to the pixel electrode 27.

The common electrode 26 and the pixel electrode 27 may be prepared by a patterning process, and the material of the common electrode 26 and the pixel electrode 27 may be, for example, indium tin oxide.

Here, the common electrode 26 is in a block shape, and the common electrodes 26 located in different sub-pixel units may be in an integral structure. The pixel electrode 27 includes a plurality of electrode stripes 271.

The array substrate 21 includes a plurality of sub-pixel units arranged at intervals, each of the sub-pixel units further includes a pixel circuit 25, the pixel circuit 25 is used for providing a data voltage to a pixel electrode 27, and the pixel electrode 27 is electrically connected with the pixel circuit 25 through a via hole.

The red reflector 2132, the green reflector 2142, and the blue reflector 2152 are disposed on a side of the pixel circuit 25 away from the first substrate 211.

The counter substrate 22 includes a second substrate 221, an upper polarizing layer 222 provided on a side of the second substrate 221 remote from the liquid crystal layer 23, and a second alignment layer 223 provided on a side of the second substrate 211 close to the liquid crystal layer 23.

The transmission axis direction of the upper polarizer layer 222 is perpendicular to the transmission axis direction of the first wire grid polarizer layer 212.

The second alignment layer 223 and the first alignment layer 219 are made of the same material and have the same alignment direction, and liquid crystal molecules in the liquid crystal layer 23 are aligned in parallel to the surface of the first substrate 211 and uniformly aligned in the alignment direction. When a voltage is applied to the pixel electrode 27, the transflective liquid crystal display 20 is in a bright state, and when no voltage is applied to the pixel electrode 27, the transflective liquid crystal display 20 is in a dark state.

Based on this transflective liquid crystal display 20, under the transmission mode, because red quantum dot layer 2131, green quantum dot layer 2141 and blue quantum dot layer 2151 can arouse the quantum dot and send red light, green glow and blue light respectively based on the quantum dot excitation light, because of comparing the structure that the color filter layer is formed by macromolecular material and organic dye mixture, the array substrate 21 luminous efficacy that this application provided is higher, can obviously improve transflective liquid crystal display 20's luminous efficiency (about promoting 90%), reduce the consumption at terminal. Under the reflection mode, red quantum dot layer 2131, green quantum dot layer 2141 and blue quantum dot layer 2151 can more fully utilize the ambient light to excite red, green and blue tricolor light (the quantum dot layer can absorb all the light with the wavelength less than the luminous peak wavelength of the quantum dot layer in the ambient light), compare the structure that the color filter layer is formed by mixing high molecular material and organic dye, the array substrate 21 that this application provided can promote the utilization ratio of ambient light by a wide margin, the display brightness and the contrast of the transflective liquid crystal display 20 can be promoted by more than 50%.

Example eight

Example eight differs from example seven in that:

as shown in fig. 25, the array substrate 21 is not provided with the first light shielding matrix 218.

As shown in fig. 9, the first wire grid polarizing layer 212 includes a plurality of first polarizing units 2121, M +1 third light-shielding strips 2123 extending in the first direction, and N +1 fourth light-shielding strips 2124 extending in the second direction.

The plurality of first polarization units 2121 includes M × N first polarization units 2121, and the arrangement structure of the M × N first polarization units 2121 is a matrix with M rows × N columns, the first direction is a row direction of the matrix, and the second direction is a column direction of the matrix.

Based on the transflective liquid crystal display 20, the first wire grid polarizing layer 212 is configured to include a plurality of first polarizing units 2121, M +1 third light-shielding strips 2123 extending along the first direction, and N +1 fourth light-shielding strips 2124 extending along the second direction, so that the array substrate 21 does not need to be separately provided with the first light-shielding matrix 218, the manufacturing process can be simplified, and the manufacturing cost can be saved. In addition, the third light-shielding strips 2123 and the fourth light-shielding strips 2124 can reflect the three primary colors of light emitted to the quantum dots layer to be reused, so that the light is not absorbed, the utilization rate of the light emitted after the quantum dots are excited can be further improved, and the power consumption of the device is reduced.

Example nine

Example nine differs from example seven and example eight in that:

as shown in fig. 26, the common electrode 26 does not need to be separately disposed on the array substrate 21, and each first polarization unit 2121 of the first wire-grid polarization layer 212 is multiplexed as the common electrode 26 in the sub-pixel unit directly opposite to the first polarization unit 2121.

In this case, the material of the first wire grid polarizing layer 212 is a conductive material.

Based on the transflective liquid crystal display panel 20, compared with the tenth embodiment in which the common electrode 26 is separately provided, the first wire-grid polarizing layer 212 has a light polarization function and can also function as the common electrode 26, so that the transflective liquid crystal display panel 20 does not need to separately provide the common electrode 26, and thus the manufacturing process, the manufacturing cost, and the thickness of the transflective liquid crystal display panel 20 can be reduced.

Example ten

Example ten differs from example seven in that:

as shown in fig. 27, the common electrode 26 is provided on the counter substrate 22, and the common electrode 26 is not provided on the array substrate 21, and only the pixel electrode 27 is provided.

The common electrode 26 is disposed between the second substrate 221 and the second alignment film 223.

The second alignment layer 223 is made of the same material as the first alignment layer 219 and has a vertical alignment direction, liquid crystal molecules in the liquid crystal layer 23 are spirally arranged, the transflective liquid crystal display panel 20 is in a bright state when no voltage is applied to the pixel electrode 27, and the transflective liquid crystal display panel 20 is in a dark state when a voltage is applied to the pixel electrode 27.

The transflective liquid crystal display panel 20 has a structure in which a common electrode 26 is provided on a counter substrate 22 and a pixel electrode 27 is provided on an array substrate 21.

In this example, the pixel electrode 27 is in a block shape.

Example eleven

Example eleven differs from example ten in that:

as shown in fig. 28, there is no need to separately provide the pixel electrode 27 on the array substrate 21, and each first polarization unit 2121 of the first wire-grid polarization layer 212 is multiplexed as the pixel electrode 27 in the sub-pixel unit directly opposite to the first polarization unit 2121.

In this case, the first wire grid polarizing layer 212 has a structure as shown in fig. 10, and the material of the first wire grid polarizing layer 212 is a conductive material.

In the transflective liquid crystal display 20, each first polarization unit 2121 of the first wire grid polarization layer 212 is reused as the pixel electrode 27, and the transflective liquid crystal display 20 does not need to separately provide the pixel electrode 27, so that the manufacturing process can be reduced, the manufacturing cost can be reduced, and the thickness of the transflective liquid crystal display 20 can be reduced.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An array substrate, comprising: the display device comprises a first substrate (211) and a plurality of sub-pixel units which are arranged at intervals and are positioned on the first substrate (211);

the plurality of sub-pixel units arranged at intervals comprise a red sub-pixel unit (213), a green sub-pixel unit (214) and a blue sub-pixel unit (215);

the red photon pixel unit (213) comprises a red quantum dot layer (2131) and a first transflective layer (2132) which are stacked, wherein the first transflective layer (2132) is positioned between the red quantum dot layer (2131) and the first substrate (211), and the first transflective layer (2132) is used for transmitting quantum dot excitation light and at least reflecting red light;

the green photonic pixel unit (214) comprises a green quantum dot layer (2141) and a second transflective layer (2142) which are stacked, wherein the second transflective layer (2142) is located between the green quantum dot layer (2141) and the first substrate (211), and the second transflective layer (2142) is used for transmitting the quantum dot excitation light and reflecting at least green light;

the blue photonic pixel unit (215) comprises a blue quantum dot layer (2151) and a third transflective layer (2152) which are stacked, wherein the third transflective layer (2152) is positioned between the blue quantum dot layer (2151) and the first substrate (211), and the third transflective layer (2152) is used for transmitting the quantum dot excitation light and reflecting at least blue light;

wherein the quantum dot excitation light is used for exciting the red quantum dot layer (2131) to emit red light, the green quantum dot layer (2141) to emit green light, and the blue quantum dot layer (2151) to emit blue light.

2. The array substrate of claim 1, wherein the first transflective layer (2132) is a red-green light reflection enhancing layer;

or,

the second light-transmitting layer (2142) is a red-green light reflection increasing layer;

or,

the first light transmitting layer (2132) and the second light transmitting layer (2142) are red-green light reflection increasing layers;

the red and green light reflection increasing layer is used for reflecting red light and green light, and the red and green light reflection increasing layer is made of a light-transmitting material.

3. The array substrate of claim 2, wherein the first transflective layer (2132) and the second transflective layer (2142) are an integral structure when the first transflective layer (2132) and the second transflective layer (2142) are both the red and green light reflection enhancing layers.

4. The array substrate of claim 1, further comprising a first wire grid polarizer layer (212) on a side of the plurality of spaced apart sub-pixel units remote from the first substrate (211);

the first wire grid polarizing layer (212) comprises a plurality of first polarizing units (2121), and the plurality of first polarizing units (2121) and the plurality of sub-pixel units arranged at intervals are arranged in a one-to-one opposite mode.

5. The array substrate of claim 4, wherein the surface of the first wire grid polarizing layer (212) away from the first substrate (211) is provided with a plurality of pits (2122).

6. The array substrate of claim 4, wherein the surface of the first wire grid polarizing layer (212) away from the first substrate (211) is provided with a light absorbing layer (216); an orthographic projection of the light absorbing layer (216) on the first substrate (211) is located within an orthographic projection of the first wire grid polarizing layer (212) on the first substrate (211).

7. The array substrate of claim 1, wherein at least one of the first transflective layer (2132), the second transflective layer (2142), and the third transflective layer (2152) is a light reflecting layer for reflecting red, green, and blue light; the material of the light reflecting layer is a shading material;

the light reflecting layer comprises at least one through hole (21521), and the through hole (21521) is used for transmitting the quantum dot excitation light.

8. The array substrate of claim 7, wherein the first transflective layer (2132) and the second transflective layer (2142) are of a unitary structure if both the first transflective layer (2132) and the second transflective layer (2142) are the light reflecting layer.

9. The array substrate of claim 7, wherein the first transflective layer (2132), the second transflective layer (2142), and the third transflective layer (2152) are of a unitary structure, when the first transflective layer (2132), the second transflective layer (2142), and the third transflective layer (2152) are all the light-reflective layers.

10. The array substrate of claim 1, wherein the first transflective layer (2132) is a red light reflection increasing layer for reflecting red light; the red light reflection increasing layer is made of a light-transmitting material;

or,

the second transflective layer (2142) is a green light reflection increasing layer for reflecting green light; the green light reflection increasing layer is made of a light-transmitting material;

or;

the third transflective layer (2152) is a blue light reflection increasing layer for reflecting blue light; the blue light reflection increasing layer is made of a light-transmitting material.

11. A liquid crystal display panel comprising an opposing substrate and the array substrate of any one of claims 1 to 10;

the counter substrate includes a second substrate (221) and an upper polarizing layer (222) disposed on the second substrate (221).

12. A terminal comprising the liquid crystal display panel of claim 11; the terminal further comprises a backlight module arranged on the light incident surface of the liquid crystal display screen.