CN113126380A

CN113126380A - Liquid crystal display panel and display device

Info

Publication number: CN113126380A
Application number: CN202110471547.XA
Authority: CN
Inventors: 钟德镇; 刘显贺; 姜丽梅
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-07-16
Anticipated expiration: 2041-04-29
Also published as: CN113126380B

Abstract

The invention discloses a liquid crystal display panel and a display device, wherein the liquid crystal display panel comprises a display liquid crystal box, the display liquid crystal box comprises a first opposite substrate, a first array substrate and a first liquid crystal layer, the first liquid crystal layer is positioned between the first opposite substrate and the first array substrate, the first liquid crystal layer comprises liquid crystal molecules and dye liquid crystal molecules which are mixed with each other, the display liquid crystal box is provided with a plurality of first pixel units, the first array substrate is provided with a first pixel electrode, and the first opposite substrate is provided with a first common electrode; the display liquid crystal box is provided with a quantum dot layer corresponding to the first pixel unit. Through set up liquid crystal molecule and the dyestuff liquid crystal molecule of intermix in showing the liquid crystal box to and collocation quantum dot layer shows the color, thereby reduce the quantity that sets up of polaroid, in order to increase the luminousness and improve the contrast, can also improve the demonstration colour gamut of product simultaneously.

Description

Liquid crystal display panel and display device

Technical Field

The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display panel and a display device.

Background

As display technologies have been developed, display panel manufacturing has become mature, and display panels provided in the prior art include liquid crystal display panels, organic light emitting display panels, plasma display panels, and the like. Typical display modes in the liquid crystal display panel include a TN (twisted nematic) display mode and an IPS (in-plane switching) display mode, the contrast ratio of the TN display mode and the IPS display mode is 1000:1-1200:1, the contrast ratio is improved by adopting a scheme of pixel optimization design, negative liquid crystal and photo alignment, the requirement of high contrast ratio is difficult to achieve, the improvement ratio is limited, the contrast ratio can only be improved to 1500:1-1800:1, and the single-item improvement ratio is limited, so that how to continuously improve the contrast ratio of the liquid crystal display panel reaches a bottleneck stage.

With the gradual popularization of HDR (high dynamic light rendering) technology and the development of technology, people have proposed a screen folding technology that is proposed by local dimming and the latest haixin to improve the dynamic contrast of liquid crystal display, so that the conventional contrast of liquid crystal display is only 1000:1, and can reach a contrast of 10000:1 or even 400000: 1.

Although the Local dimming technique using BL (backlight) for dimming can further improve the contrast ratio on the original basis, it is more complicated in BL design, and meanwhile, cannot be accurate to the precise control of the pixel level brightness, and the color gamut is poor, resulting in poor display quality. With the development of the information age, users are more and more eagerly pursuing high-contrast display and improvement of high-color gamut display quality.

Disclosure of Invention

In order to overcome the disadvantages and shortcomings of the prior art, an object of the present invention is to provide a liquid crystal display panel and a display device, so as to solve the problem that the display panel in the prior art cannot simultaneously achieve high contrast and high color gamut display quality.

The purpose of the invention is realized by the following technical scheme:

the invention provides a liquid crystal display panel, which comprises a display liquid crystal box and a backlight module, wherein the display liquid crystal box comprises a first opposite substrate, a first array substrate and a first liquid crystal layer, the first liquid crystal layer is positioned between the first opposite substrate and the first array substrate, the first liquid crystal layer comprises liquid crystal molecules and dye liquid crystal molecules which are mixed with each other, the display liquid crystal box is provided with a plurality of first pixel units, first pixel electrodes corresponding to the first pixel units are arranged on the first array substrate, and first public electrodes matched with the first pixel electrodes are arranged on the first opposite substrate; the display liquid crystal box is also provided with a quantum dot layer corresponding to the first pixel unit.

Preferably, the liquid crystal display panel further comprises a light control liquid crystal cell located between the display liquid crystal cell and the backlight module; the light control liquid crystal box is used for controlling the brightness of light rays emitted into the display liquid crystal box by the backlight module;

the light control liquid crystal box comprises a second opposite substrate, a second array substrate and a second liquid crystal layer positioned between the second opposite substrate and the second array substrate, and is provided with a plurality of second pixel units, wherein each second pixel unit at least corresponds to one first pixel unit.

Preferably, the liquid crystal display panel further includes a first polarizer, and the first polarizer is located on one side of the display liquid crystal box facing the backlight module or one side of the display liquid crystal box far away from the backlight module.

Preferably, the liquid crystal display panel further comprises a first polarizer and a second polarizer, wherein the first polarizer is located on one side of the display liquid crystal box facing the backlight module or one side of the display liquid crystal box far away from the backlight module; the second polaroid is positioned on one side of the light control liquid crystal box far away from the display liquid crystal box; the transmission axes of the first polarizer and the second polarizer are mutually vertical.

Preferably, the display liquid crystal cell is provided with a first prism layer, and the first prism layer is located on one side of the first liquid crystal layer facing the backlight module.

Preferably, the first prism layer has a first rib structure and a second rib structure, and the extending directions of the first rib structure and the second rib structure are perpendicular to each other.

Preferably, the display liquid crystal box is provided with a first prism layer, and the first prism layer is positioned on one side of the first liquid crystal layer facing the backlight module; the light control liquid crystal box is provided with a second prism layer, the second prism layer is positioned on one side of the second liquid crystal layer facing the backlight module, and the direction of the ribs of the first prism layer is vertical to the direction of the ribs of the second prism layer.

Preferably, the quantum dot layer is located on a side of the first liquid crystal layer facing the backlight module.

Preferably, the first array substrate is located on one side of the first liquid crystal layer away from the backlight module, and the first opposite substrate is located on one side of the first liquid crystal layer facing the backlight module;

the first array substrate is provided with a first anti-reflection layer, a scanning line, a grid electrode, a second anti-reflection layer, a data line, a source electrode and a drain electrode, the first anti-reflection layer covers one side of the scanning line and the grid electrode, which are far away from the backlight module, and the second anti-reflection layer covers one side of the data line, the source electrode and the drain electrode, which are far away from the backlight module.

The invention also provides a display device which comprises the liquid crystal display panel.

The invention has the beneficial effects that: the liquid crystal display panel comprises a display liquid crystal box, wherein the display liquid crystal box comprises a first opposite substrate, a first array substrate and a first liquid crystal layer, the first liquid crystal layer is positioned between the first opposite substrate and the first array substrate, the first liquid crystal layer comprises liquid crystal molecules and dye liquid crystal molecules which are mixed with each other, the display liquid crystal box is provided with a plurality of first pixel units, the display liquid crystal box is provided with a quantum dot layer corresponding to the first pixel units, first pixel electrodes corresponding to the first pixel units are arranged on the first array substrate, and first public electrodes matched with the first pixel electrodes are arranged on the first opposite substrate. Through set up liquid crystal molecule and the dyestuff liquid crystal molecule of intermix in showing the liquid crystal box to and collocation quantum dot layer shows the color, thereby reduce the quantity that sets up of polaroid, in order to increase the luminousness and improve the contrast, can also improve the demonstration colour gamut of product simultaneously.

Drawings

FIG. 1 is a schematic structural diagram of a display device in a dark state according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a display device in a bright state according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first prism layer according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a display device in a bright state according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a display device in a dark state according to a second embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a display device in a bright state according to a third embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a display device in a bright state according to a fourth embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a fifth embodiment of a display device in a bright state according to the present invention;

FIG. 9 is a schematic structural diagram of a display device in a bright state according to a sixth embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a display device in a bright state according to a seventh embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a display device in an eighth embodiment of the present invention in a bright state;

FIG. 12 is a schematic structural diagram of a display device in a bright state according to a ninth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a display device in a bright state according to a tenth embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the liquid crystal display panel and the display device according to the present invention with reference to the accompanying drawings and the preferred embodiments is as follows:

[ example one ]

Fig. 1 is a schematic structural diagram of a display device in a dark state according to a first embodiment of the present invention, fig. 2 is a schematic structural diagram of a display device in a bright state according to a first embodiment of the present invention, and fig. 3 is a schematic structural diagram of a first prism layer according to a first embodiment of the present invention. As shown in fig. 1 to fig. 3, a liquid crystal display panel according to an embodiment of the present invention includes a display liquid crystal cell 10 and a backlight module 40, the display liquid crystal cell 10 includes a first opposing substrate 11, a first array substrate 12 and a first liquid crystal layer 13, the first liquid crystal layer 13 is located between the first opposing substrate 11 and the first array substrate 12, the first liquid crystal layer 13 includes liquid crystal molecules 131 and dye liquid crystal molecules 132 mixed with each other, the display liquid crystal cell 10 has a plurality of first pixel units, a first pixel electrode 122 corresponding to the first pixel unit is disposed on the first array substrate 12, and a first common electrode 113 matched with the first pixel electrode 122 is disposed on the first opposing substrate 11; the liquid crystal cell 10 is shown to be provided with a quantum dot layer 112 corresponding to the first pixel cell.

In this embodiment, the liquid crystal cell 10 is in a TN display mode, and in the initial state, the long axes of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a lying posture. The liquid crystal molecules 131 in the first liquid crystal layer 13 are positive liquid crystal molecules (liquid crystal molecules having positive dielectric anisotropy), and as shown in fig. 1, in an initial state (dark state), the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a lying posture, and the alignment directions of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 close to the first opposing substrate 11 and the alignment directions of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 close to the first array substrate 12 are perpendicular to each other, that is, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 are twisted by 90 ° from top to bottom.

The dye liquid crystal molecules 132 are positive dye liquid crystal molecules, the light absorption capacity of the long axis of the positive dye liquid crystal molecules is greater than that of the short axis, and the positive dye liquid crystal molecules have the characteristics that the long axis has strong light absorption capacity and the short axis has weak light absorption capacity. That is, light parallel to the long axis of the dye liquid crystal molecules 132 is absorbed by the dye liquid crystal molecules 132, and light perpendicular to the long axis of the dye liquid crystal molecules 132 can pass through the dye liquid crystal molecules 132. The dye liquid crystal molecules 132 can be black dye liquid crystal molecules or purple black dye liquid crystal molecules, and the dye liquid crystal molecules 132 can be prepared by dyeing the liquid crystal molecules, but cannot be deflected in an electric field, so that the liquid crystal molecules 131 are required to carry the dye liquid crystal molecules 132 to rotate in the electric field.

In this embodiment, the display liquid crystal cell 10 does not need to be provided with an upper polarizer and a lower polarizer, and the structure can improve the transmittance, save power consumption, and realize high color gamut display through the quantum dot layer. Of course, in other embodiments, the liquid crystal display cell 10 may be provided with an upper polarizer or a lower polarizer, but the transmittance is affected.

In this embodiment, the first array substrate 12 is defined by a plurality of scan lines (not shown) and a plurality of data lines (not shown) crossing each other in an insulated manner on a side facing the first liquid crystal layer 13 to form a plurality of first pixel units, each of the first pixel units is provided with a first pixel electrode 122 and a thin film transistor, and the first pixel electrode 122 is electrically connected to the data lines of the adjacent thin film transistors through the thin film transistors. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, the gate electrode and the scan line are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the first pixel electrode 122 are electrically connected through a contact hole.

In this embodiment, the quantum dot layer 112 is located on the first opposite substrate 11 and close to one side of the first liquid crystal layer 13, that is, the first opposite substrate 11 is a color filter substrate. The first opposite substrate 11 is further provided with a first black matrix 111 and a first common electrode 113 matched with the first pixel electrode 122, the first common electrode 113 is of a whole-surface structure, and the first black matrix 111 corresponds to the scanning lines and the data lines on the first opposite substrate 11 and separates a plurality of first pixel units. Of course, in other embodiments, the quantum dot layer 112 may also be located on the first array substrate 12, that is, the quantum dot layer 112 may be located on the side of the first liquid crystal layer 13 facing the backlight module 40, so as to further improve the depolarization problem of the light after passing through the quantum dots, avoid sacrificing the contrast ratio, and further improve the contrast ratio.

Further, the liquid crystal display cell 10 is provided with a first prism layer 121, and the first prism layer 121 is located on a side of the first liquid crystal layer 13 facing the backlight module 40. As shown in fig. 3, the first prism layer 121 has a first rib structure 121a and a second rib structure 121b, and the extending directions of the first rib structure 121a and the second rib structure 121b are perpendicular to each other. The first prism layer 121 has a diffusion function, so that the wide viewing angle effect of the liquid crystal display panel in the up-down and left-right directions can be improved.

The first counter substrate 11 and the first array substrate 12 may be made of transparent substrates such as glass, acrylic, and polycarbonate. The material of the first pixel electrode 122 and the first common electrode 113 may be a transparent electrode such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

The embodiment further provides a display device, which includes the backlight module 40 and the liquid crystal display panel.

In this embodiment, the first array substrate 12 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, that is, the first opposite substrate 11 is located above the first liquid crystal layer 13, and the first array substrate 12 is located below the first liquid crystal layer 13. The backlight module 40 may be a side-in type backlight module or a direct type backlight module. Of course, in other embodiments, the first opposing substrate 11 may be located on a side of the first liquid crystal layer 13 facing the backlight module 40, that is, the first opposing substrate 11 is located below the first liquid crystal layer 13, and the first array substrate 12 is located above the first liquid crystal layer 13.

In this embodiment, the backlight source of the backlight module 40 uses a blue light source, the first pixel unit includes a red pixel unit, a green pixel unit and a transparent pixel unit, the quantum dot layer 112 includes a red quantum dot and a green quantum dot, the red quantum dot corresponds to an area of the red pixel unit, the green quantum dot corresponds to an area of the green pixel unit, the area corresponding to the transparent pixel unit is filled with a flat layer, and the blue light source is displayed as blue when passing through the transparent pixel unit. The red quantum dots can excite red light, and the green quantum dots can excite green light. Of course, in other embodiments, the backlight source may also adopt a violet light source, and the quantum dot layer 112 includes red quantum dots, green quantum dots, and blue quantum dots, where the red quantum dots can excite red light, the green quantum dots can excite green light, the blue quantum dots can excite blue light, and the red light, the green light, and the blue light excited by the quantum dots are mixed to form white light. The quantum dots can excite high-purity light rays, and the display color gamut of the product can be improved.

Wherein, the quantum dot is a semiconductor nano crystal, the particle diameter is 2nm-10nm, and the quantum dot is an aggregate of atomic nucleus molecules: consists of zinc, cadmium, sulfur and arsenic atoms. The quantum dots can excite monochromatic light with different colors by quantum dots with different diameters under the stimulation of light or electricity. Generally, 2nm quantum dots can excite the purest green light, 4 nm quantum dots can excite the purest blue light, and 6 nm quantum dots can excite the purest red light. That is to say, the red quantum dots, the green quantum dots and the blue quantum dots have different sizes, and the red quantum dots can absorb light energy emitted by the light source, which is greater than that of red light, and convert the light energy into monochromatic red light and emit the monochromatic red light by using the size effect and the stokes spectrum displacement effect of the quantum dots, so that the red light color in the red sub-pixel becomes purer; the green quantum dots can absorb light with light energy more than that of green light emitted by the light source, convert the light into monochromatic green light and emit the monochromatic green light, and the green light color in the green sub-pixels becomes purer; the blue quantum dots can absorb light with light energy greater than that of the blue light, convert the light into monochromatic blue light, and emit the monochromatic blue light, so that the color of the blue light in the blue sub-pixels becomes purer.

As shown in fig. 1, in the dark state, the first pixel electrode 122 and the first common electrode 113 do not need to apply a voltage, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 maintain an initial twisted state of 90 ° under the action of the chiral agent, and light emitted from the backlight passes through the first array substrate 12 and is absorbed by the dye liquid crystal molecules 132, so that the dark state is presented. As shown in fig. 2, in a bright state, a first common voltage is applied to the first common electrode 113, a first pixel voltage is applied to the first pixel electrode 122, a vertical electric field is formed between the first pixel electrode 122 and the first common electrode 113, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 deflect and are perpendicular to the first opposite substrate 11 and the first array substrate 12, light emitted from a backlight passes through the first array substrate 12 and is not absorbed by the dye liquid crystal molecules 132, and the corresponding pixel unit is in a bright state. The first pixel voltage comprises 0-255 gray scale voltages, so that the pixel unit is controlled to display different brightness, and different pictures are displayed.

[ example two ]

Fig. 4 is a schematic structural diagram of a display device in a bright state according to a second embodiment of the present invention, and fig. 5 is a schematic structural diagram of a display device in a dark state according to the second embodiment of the present invention. As shown in fig. 4 and 5, the liquid crystal display panel and the display device according to the second embodiment of the present invention are substantially the same as the liquid crystal display panel and the display device according to the first embodiment (fig. 1 to 3), except that in this embodiment, the display liquid crystal cell 10 is in a VA display mode, and the liquid crystal molecules 131 in the first liquid crystal layer 13 are negative liquid crystal molecules (liquid crystal molecules with negative dielectric anisotropy). In the initial state, the long axes of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a standing posture and are perpendicular to the first opposite substrate 11 and the first array substrate 12. Among them, the VA display mode is preferably an MVA display mode.

Further, the first common electrodes 113 on the first opposing substrate 11 are in a stripe structure, and the center lines of two adjacent first common electrodes 113 correspond to the first pixel electrodes 122, that is, the gaps between two adjacent first common electrodes 113 and the gaps between two adjacent first pixel electrodes 122 are staggered, so that the first common electrodes 113 and the first pixel electrodes 122 form an oblique electric field.

Since the VA display mode has a wider viewing angle, the first prism layer 121 is not required to be disposed in this embodiment to increase the wide viewing angle range of the display device. Of course, in other embodiments, the first prism layer may also be disposed at the same time to further improve the wide viewing angle range, which is not limited herein.

As shown in fig. 4, in the bright state, no voltage is applied to the first pixel electrode 122 and the first common electrode 113, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 are not deflected and maintain the initial standing posture under the action of the alignment film, the light emitted from the backlight 40 passes through the first polarizer 31 and is not absorbed by the dye liquid crystal molecules 132, and the corresponding pixel unit is in the bright state, that is, the display device in this embodiment is in the normally bright mode, so that power consumption can be saved. As shown in fig. 5, in a dark state, a first common voltage is applied to the first common electrode 113, a first pixel voltage is applied to the first pixel electrode 122, an oblique electric field is formed between the first pixel electrode 122 and the first common electrode 113, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 deflect and have a certain inclination angle with the first opposing substrate 11 and the first array substrate 12, light emitted by the light source 41 passes through the first polarizer 31 and is absorbed by the dye liquid crystal molecules 132, and a corresponding pixel unit is in a dark state. The first pixel voltage comprises 0-255 gray scale voltages, so that the pixel unit is controlled to display different brightness, and different pictures are displayed.

Further, a first Polarizer 31 is further disposed on the upper side or the lower side of the display liquid crystal cell 10, the first Polarizer 31 is a Polarizer apf (advanced Polarizer film) with a brightness enhancement function, that is, a common Polarizer and a brightness enhancement film are integrally formed, so that the first Polarizer 31 is directly attached to one side of the first array substrate 12 facing the backlight module 40, and of course, the first Polarizer may also be directly attached to one side of the first opposite substrate 11 away from the backlight module 40.

The brightening type polaroid can be directly attached to the surface of glass, the bright surface faces to one side of the backlight module, and the brightening type polaroid is simple in manufacturing process and easy to realize while the brightness is improved. In the embodiment, the single-box structure is matched with the dye liquid crystal and the quantum dot color film to realize the liquid crystal display structure with thin and light box thickness, low power consumption and high color gamut.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.

[ third example ]

Fig. 6 is a schematic structural diagram of a display device in a bright state according to a third embodiment of the present invention. As shown in fig. 6, a liquid crystal display panel according to a third embodiment of the present invention includes a display liquid crystal cell 10, a light control liquid crystal cell 20, and a backlight module 40 stacked one on another;

the display liquid crystal cell 10 includes a first opposite substrate 11, a first array substrate 12, and a first liquid crystal layer 13 located between the first opposite substrate 11 and the first array substrate 12, where the first liquid crystal layer 13 includes liquid crystal molecules 131 and dye liquid crystal molecules 132 mixed with each other, the display liquid crystal cell 10 has a plurality of first pixel units, the display liquid crystal cell 10 is provided with a quantum dot layer 112 corresponding to the first pixel units, the first array substrate 12 is provided with first pixel electrodes 122 corresponding to the first pixel units, and the first opposite substrate 11 is provided with a first common electrode 113 matched with the first pixel electrodes 122.

The light control liquid crystal box 20 includes a second opposite substrate 21, a second array substrate 22 and a second liquid crystal layer 23 located between the second opposite substrate 21 and the second array substrate 22, the light control liquid crystal box 20 has a plurality of second pixel units, each second pixel unit corresponds to at least one first pixel unit, preferably, the pixel resolution of the light control liquid crystal box 20 is different from that of the display liquid crystal box 10, and the light control liquid crystal box 20 is used for controlling the brightness of light emitted into the display liquid crystal box 10 by the backlight module 40, so that the dark place of the picture can be darker, the contrast of the picture can be improved, the image display can be clearer, and the picture quality can be finer and finer.

The first polarizer 31 is disposed between the display liquid crystal cell 10 and the light control liquid crystal cell 20, the second polarizer 32 is disposed on a side of the light control liquid crystal cell 20 away from the display liquid crystal cell 10, and transmission axes of the first polarizer 31 and the second polarizer 32 are perpendicular to each other.

In this embodiment, the liquid crystal cell 10 is in a TN display mode, and in the initial state, the long axes of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a lying posture. The liquid crystal molecules 131 in the first liquid crystal layer 13 are positive liquid crystal molecules (liquid crystal molecules having positive dielectric anisotropy), and as shown in fig. 6, in an initial state (dark state), the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a lying posture, and the alignment directions of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 close to the first opposing substrate 11 and the alignment directions of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 close to the first array substrate 12 are perpendicular to each other, that is, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 are twisted by 90 ° from top to bottom.

In this embodiment, the first polarizer 31 and the second polarizer 32 both use common polarizers. Of course, a polarizer having a brightness enhancing function may be used for the second polarizer 32.

Further, the display liquid crystal cell 10 is located on a side of the light control liquid crystal cell 20 away from the backlight module 40, and the first polarizer 31 is disposed between the display liquid crystal cell 10 and the light control liquid crystal cell 20.

The first array substrate 12 defines a plurality of first pixel units on a side facing the first liquid crystal layer 13 by a plurality of scan lines (not shown) and a plurality of data lines (not shown) insulated from each other and crossing each other, each of the first pixel units having a first pixel electrode 122 and a thin film transistor disposed therein, the first pixel electrode 122 being electrically connected to the data lines of the adjacent thin film transistors through the thin film transistors. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, the gate electrode and the scan line are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the first pixel electrode 122 are electrically connected through a contact hole.

In this embodiment, the quantum dot layer 112 is located on the first opposite substrate 11, that is, the first opposite substrate 11 is a color filter substrate. The first opposite substrate 11 is further provided with a first black matrix 111 and a first common electrode 113 matched with the first pixel electrode 122, the first common electrode 113 is of a whole-surface structure, and the first black matrix 111 corresponds to the scanning lines and the data lines on the first opposite substrate 11 and separates a plurality of first pixel units. Of course, in other embodiments, the quantum dot layer 112 may also be located on the first array substrate 12, that is, the quantum dot layer 112 is located on the side of the first liquid crystal layer 13 facing the backlight module 40, so as to further improve the depolarization problem of the light after passing through the quantum dots, avoid sacrificing the contrast ratio, and further improve the contrast ratio.

Further, the display liquid crystal cell 10 is provided with a first prism layer 121, the first prism layer 121 is located on one side of the first liquid crystal layer 13 facing the backlight module 40, the light control liquid crystal cell 20 is provided with a second prism layer 221, the second prism layer 221 is located on one side of the second liquid crystal layer 23 facing the backlight module 40, and the ridge direction of the first prism layer 121 is perpendicular to the ridge direction of the second prism layer 221. In this embodiment, the rib directions of the first prism layer 121 all face the same direction, and because the light-controlling liquid crystal cell 20 is further provided with the second prism layer 221 perpendicular to the rib direction of the first prism layer 121, the wide viewing angle effect in the up-down and left-right directions can be realized, and the rib of the first prism layer 121 does not need to be set to two mutually perpendicular directions. Of course, an embodiment in which the ribs of the first prism layer 121 are disposed in two directions perpendicular to each other and the ribs of the second prism layer 221 are disposed in two directions perpendicular to each other is also not excluded. Or the light control liquid crystal box 20 has no prism structure, only the display liquid crystal box 10 is provided with the prism structure, and the prism structure can adjust the prism depth through the modification of the process parameters according to the actual effect, so that the optimal display effect is obtained.

Meanwhile, although the pixel resolutions of the light control liquid crystal cell 20 and the display liquid crystal cell 10 are different, theoretically, the greater the number of the second pixel units of the light control liquid crystal cell 20 is, the more accurate the control of the light output can be, and the better the image display effect is. If the size of the first pixel unit in the display liquid crystal cell 10 and the size of the second pixel unit in the light control liquid crystal cell 20 are both in an order of magnitude, the light and dark alternate stripes are easily generated on the stacked pictures of the display liquid crystal cell 10 and the light control liquid crystal cell 20 due to the relatively close spatial periods. In this embodiment, the first prism layer 121 is disposed on the display liquid crystal cell 10, the second prism layer 221 is disposed on the light-controlling liquid crystal cell 20, and the rib direction of the first prism layer 121 and the rib direction of the second prism layer 221 are perpendicular to each other, so that overlapping of the shading areas of the display liquid crystal cell 10 and the light-controlling liquid crystal cell 20 is avoided, moire fringes can be effectively improved, and the display effect can be further optimized while high contrast is achieved.

Further, a first black matrix 111 is disposed on the first opposing substrate 11, a second black matrix 211 is disposed on the second opposing substrate 21, and the first black matrix 111 and the second black matrix 211 are aligned up and down. The second opposite substrate 21 does not need to be provided with color resists and quantum dots, and the second opposite substrate 21 is further provided with a flat layer (OC). In this embodiment, each second pixel unit corresponds to one first pixel unit, and certainly, each second pixel unit may also correspond to a plurality of first pixel units.

The second array substrate 22 defines a plurality of second pixel cells on a side facing the second liquid crystal layer 23 by a plurality of scanning lines and a plurality of data lines insulated from and crossing each other, a second pixel electrode 223 and a thin film transistor are provided in each of the second pixel cells, and the second pixel electrode 223 is electrically connected to the data line of the adjacent thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode and a source electrode, the gate electrode and the scan line are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the second pixel electrode 223 are electrically connected through a contact hole.

As shown in fig. 6, in the present embodiment, a second common electrode 222 is further disposed on a side of the second array substrate 22 facing the second liquid crystal layer 23, and the second common electrode 222 and the second pixel electrode 223 are located on different layers and insulated and isolated by an insulating layer. The second common electrode 222 may be positioned above or below the second pixel electrode 223 (the second common electrode 222 is positioned below the second pixel electrode 223 as shown in fig. 6). Preferably, the second common electrode 222 is a planar electrode disposed over the entire surface, and the second pixel electrode 223 is a block electrode disposed in one block in each pixel unit or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the second pixel electrode 223 and the second common electrode 222 may be located on the same layer, but they are insulated and isolated from each other, each of the second pixel electrode 223 and the second common electrode 222 may include a plurality of electrode stripes, and the electrode stripes of the second pixel electrode 223 and the electrode stripes of the second common electrode 222 are alternately arranged to form an In-Plane Switching (IPS) mode; alternatively, in other embodiments, the second array substrate 22 is provided with a second pixel electrode 223 at a side facing the second liquid crystal layer 23, and the second opposite substrate 21 is provided with a second common electrode 222 at a side facing the second liquid crystal layer 23 to form a TN display mode or a VA display mode.

The first opposing substrate 11, the first array substrate 12, the second opposing substrate 21, and the second array substrate 22 may be made of transparent substrates such as glass, acrylic, and polycarbonate. The material of the first pixel electrode 122, the first common electrode 113, the second pixel electrode 223, and the second common electrode 222 may be a transparent electrode such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

In this embodiment, the backlight source of the backlight module 40 uses a blue light source, for example, a blue LED, the first pixel unit includes a red pixel unit, a green pixel unit and a transparent pixel unit, the quantum dot layer 112 includes a red quantum dot and a green quantum dot, the red quantum dot corresponds to a region of the red pixel unit, the green quantum dot corresponds to a region of the green pixel unit, the region corresponding to the transparent pixel unit is filled with a flat layer, and the blue light source is displayed as blue when passing through the transparent pixel unit. The red quantum dots can excite red light, and the green quantum dots can excite green light. Of course, in other embodiments, the backlight source may also adopt a violet light source, and the quantum dot layer 112 includes red quantum dots, green quantum dots, and blue quantum dots, where the red quantum dots can excite red light, the green quantum dots can excite green light, the blue quantum dots can excite blue light, and the red light, the green light, and the blue light excited by the quantum dots are mixed to form white light. The quantum dots can excite high-purity light rays, and the display color gamut of the product can be improved.

In a dark state, no voltage is applied to the first pixel electrode 122, the first common electrode 113, the second pixel electrode 223, and the second common electrode 222, the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 are not deflected and maintain an initial lying state, and light emitted from the backlight passes through the first polarizer 31 and is absorbed by the dye liquid crystal molecules 132 to be in a dark state. As shown in fig. 6, in a bright state, a first common voltage is applied to the first common electrode 113, a first pixel voltage is applied to the first pixel electrode 122, a vertical electric field is formed between the first pixel electrode 122 and the first common electrode 113, and the liquid crystal molecules 131 and the dye liquid crystal molecules 132 in the first liquid crystal layer 13 are deflected and perpendicular to the first opposing substrate 11 and the first array substrate 12. The second pixel electrode 223 applies a second pixel voltage, the second common electrode 222 applies a second common voltage, a horizontal electric field is formed between the second pixel electrode 223 and the second common electrode 222, liquid crystal molecules in the second liquid crystal layer 23 are deflected horizontally, light emitted by the backlight passes through the light control liquid crystal cell 20 and is not absorbed by the dye liquid crystal molecules 132, and the corresponding pixel unit is in a bright state. The first pixel voltage and the second pixel voltage both include gray scale voltages of 0-255, so that the brightness of each pixel unit is commonly controlled by the first pixel electrode 122 and the second pixel electrode 223, thereby improving the dynamic contrast performance and enhancing the product competitiveness.

In this embodiment, the brightness of the light emitted from the backlight module 40 into the display liquid crystal cell 10 is controlled by disposing the light-controlling liquid crystal cell 20 between the display liquid crystal cell 10 and the backlight module 40, so as to improve the dynamic contrast performance and the product competitiveness.

[ example four ]

Fig. 7 is a schematic structural diagram of a display device in a bright state according to a fourth embodiment of the present invention. As shown in fig. 7, the liquid crystal display panel and the display device according to the fourth embodiment of the invention are substantially the same as those of the third embodiment (fig. 6), except that in the present embodiment, the light controlling liquid crystal cell 20 adopts a TN display mode, and the second counter substrate 21 is provided with a second common electrode 222 on a side facing the second liquid crystal layer 23. That is, the display liquid crystal cell 10 and the light control liquid crystal cell 20 both adopt a TN display mode. The liquid crystal molecules in the second liquid crystal layer 23 are positive liquid crystal molecules (liquid crystal molecules having positive dielectric anisotropy), and in the initial state, the liquid crystal molecules are in a lying posture, and the alignment direction of the liquid crystal molecules near the second opposite substrate 21 and the alignment direction of the liquid crystal molecules near the second array substrate 22 are perpendicular to each other, that is, the liquid crystal molecules in the second liquid crystal layer 23 are in a state of being twisted by 90 ° from top to bottom. Of course, in other embodiments, the VA mode can be used for the light-controlling liquid crystal cell 20. The prism structure of the TN mode of this embodiment may be separately located in the display liquid crystal cell and the light control liquid crystal cell, or may be separately located in one of the liquid crystal cells, and when located in one of the liquid crystal cells, the prism structure is vertically disposed.

In this embodiment, the light-controlling liquid crystal cell 20 adopts a TN display mode, and is in a normally bright mode in an initial state, so that power consumption can be reduced.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the present embodiment, and are not described herein again.

[ example five ]

Fig. 8 is a schematic structural diagram of a display device in a bright state according to a fifth embodiment of the present invention. As shown in fig. 8, the liquid crystal display panel and the display device according to the fifth embodiment of the present invention are substantially the same as the liquid crystal display panel and the display device according to the third embodiment (fig. 6), except that in this embodiment, the display liquid crystal cell 10 is in a VA display mode, and the liquid crystal molecules 131 in the first liquid crystal layer 13 are negative liquid crystal molecules (liquid crystal molecules with negative dielectric anisotropy). In the initial state, the long axes of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a standing posture and are perpendicular to the first opposite substrate 11 and the first array substrate 12.

Further, the entire surface structure of the first common electrode 113 on the first opposing substrate 11, that is, the vertical electric field is formed between the first common electrode 113 and the first pixel electrode 122.

In this embodiment, the first polarizer 31 is preferably disposed on the upper side of the display liquid crystal cell 10, that is, the first polarizer is directly attached to the side of the first opposing substrate 11 away from the backlight module 40.

Since the VA display mode has a wider viewing angle, the first prism layer 121 and the second prism layer 221 are not required to be disposed in this embodiment to increase the wide viewing angle range of the display device. The light controlling liquid crystal cell 20 may also be a VA mode. Of course, in other embodiments, the first prism layer may also be disposed at the same time to further improve the wide viewing angle range, which is not limited herein.

[ sixth example ]

Fig. 9 is a schematic structural diagram of a display device in a bright state according to a sixth embodiment of the present invention. As shown in fig. 9, a liquid crystal display panel and a display device according to a sixth embodiment of the present invention are substantially the same as those of the third embodiment (fig. 6), except that in this embodiment, the quantum dot layer 112 is located on the first array substrate 12, and a region corresponding to the first pixel unit on the first opposite substrate 11 is filled with a planarization layer, that is, the quantum dot layer 112 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, and the first opposite substrate 11 is a common transparent substrate, not a color filter substrate. When the quantum dot layer 112 is disposed on the first array substrate 12, a bm (black matrix) black matrix 111 and a PS (photo spacer) (not shown) for supporting may be disposed on the first opposite substrate 11 side, and when the black matrix 111 is disposed on the first array substrate 12 side, the black matrix, the quantum dot layer 112 and the PS are disposed on the first array substrate 12 side.

In this embodiment, the liquid crystal cell 10 is shown without the first prism layer 121, and the light-controlling liquid crystal cell 20 is shown without the second prism layer 221, so that the viewing angle is relatively narrow, but this embodiment is not excluded. Of course, the first prism layer 121 and the second prism layer 221 may also be disposed to further improve the wide viewing angle range, which is not limited herein.

In the embodiment, the quantum dot layer 112 is located on one side of the first liquid crystal layer 13 facing the backlight module 40, so that the problem of light beam depolarization after passing through the quantum dots can be improved, and the contrast ratio is prevented from being sacrificed, thereby further improving the contrast ratio.

[ seventh example ]

Fig. 10 is a schematic structural diagram of a display device in a bright state according to a seventh embodiment of the present invention. As shown in fig. 10, a liquid crystal display panel and a display device according to a seventh embodiment of the invention are substantially the same as the liquid crystal display panel and the display device according to the sixth embodiment (fig. 9), except that in this embodiment, the first array substrate 12 is located on a side of the first liquid crystal layer 13 away from the backlight module 40, the first opposite substrate 11 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, that is, the first array substrate 12 is located above the first liquid crystal layer 13, and the first opposite substrate 11 is located below the first liquid crystal layer 13.

The first array substrate 12 is provided with a first anti-reflection layer 101, a scan line, a gate 102, a second anti-reflection layer 103, a data line, a source 104 and a drain 105, the first anti-reflection layer 101 covers the scan line and the gate 102 at a side far away from the backlight module 40, and the second anti-reflection layer 103 covers the data line, the source 104 and the drain 105 at a side far away from the backlight module 40. The first anti-reflection layer 101 and the second anti-reflection layer 103 are made of molybdenum oxide (MoOx), and a first molybdenum oxide layer is covered on the first array substrate 12, then a first metal layer is covered on the first molybdenum oxide layer, and a scan line and a gate 102 are manufactured, a gate insulating layer is covered, a second molybdenum oxide layer is covered on the gate insulating layer, and then a second metal layer is covered on the second molybdenum oxide layer, and a data line, a source 104 and a drain 105 are manufactured.

Further, the quantum dot layer 112 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, i.e. the quantum dot layer 112 is located on the first opposite substrate 11.

In this embodiment, the first anti-reflection layer 101 and the second anti-reflection layer 103 are disposed to prevent the scan lines, the gate electrode 102, the data lines, the source electrode 104 and the drain electrode 105 from reflecting ambient light, so as to improve the contrast of the display device.

Those skilled in the art should understand that the rest of the structure and the operation principle of the present embodiment are the same as those of the sixth embodiment, and are not described herein again.

[ eighth example ]

Fig. 11 is a schematic structural diagram of a display device in an eighth embodiment of the invention in a bright state. As shown in fig. 11, the liquid crystal display panel and the display device according to the eighth embodiment of the present invention are substantially the same as the liquid crystal display panel and the display device according to the sixth embodiment (fig. 9), except that in this embodiment, the display liquid crystal cell 10 is in a VA display mode, and the liquid crystal molecules 131 in the first liquid crystal layer 13 are negative liquid crystal molecules (liquid crystal molecules with negative dielectric anisotropy). In the initial state, the long axes of the liquid crystal molecules 131 and the dye liquid crystal molecules 132 are in a standing posture and are perpendicular to the first opposite substrate 11 and the first array substrate 12.

Further, the entire surface structure of the first common electrode 113 on the first opposing substrate 11, i.e., between the first common electrode 113 and the first pixel electrode 122, is a vertical electric field.

Since the VA display mode has a wider viewing angle, the first prism layer 121 and the second prism layer 221 are not required to be disposed in this embodiment to increase the wide viewing angle range of the display device. The light controlling liquid crystal cell 20 of the present embodiment may also be a VA mode. Of course, in other embodiments, the first prism layer and the second prism layer may be disposed simultaneously, which is not limited herein, to further improve the wide viewing angle range.

[ example nine ]

Fig. 12 is a schematic structural diagram of a display device in a bright state according to a ninth embodiment of the present invention. As shown in fig. 12, a liquid crystal display panel and a display device according to a ninth embodiment of the present invention are substantially the same as the liquid crystal display panel and the display device according to the third embodiment (fig. 6), except that in this embodiment, the quantum dot layer 112 is located on the first array substrate 12, and a region corresponding to the first pixel unit on the first opposite substrate 11 is filled with a planarization layer, that is, the quantum dot layer 112 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, and the first opposite substrate 11 is a common transparent substrate, not a color filter substrate.

Further, the display liquid crystal cell 10 is provided with a first prism layer 121, the first prism layer 121 is located on one side of the first liquid crystal layer 13 facing the backlight module 40, the light control liquid crystal cell 20 is provided with a second prism layer 221, the second prism layer 221 is located on one side of the second liquid crystal layer 23 facing the backlight module 40, and the ridge direction of the first prism layer 121 is perpendicular to the ridge direction of the second prism layer 221. In this embodiment, the rib directions of the first prism layer 121 all face the same direction, and because the light-controlling liquid crystal cell 20 is further provided with the second prism layer 221 perpendicular to the rib direction of the first prism layer 121, the wide viewing angle effect in the up-down and left-right directions can be realized, and the rib of the first prism layer 121 does not need to be set to two mutually perpendicular directions.

In the embodiment, the quantum dot layer 112 is located on one side of the first liquid crystal layer 13 facing the backlight module 40, so as to improve the problem of light beam depolarization after passing through the quantum dots, and avoid sacrificing the contrast ratio, thereby further improving the contrast ratio.

[ example ten ]

Fig. 13 is a schematic structural diagram of a display device in a bright state according to a tenth embodiment of the present invention. As shown in fig. 13, a liquid crystal display panel and a display device according to a tenth embodiment of the present invention are substantially the same as those of the ninth embodiment (fig. 12), except that in this embodiment, the first array substrate 12 is located on a side of the first liquid crystal layer 13 away from the backlight module 40, the first opposite substrate 11 is located on a side of the first liquid crystal layer 13 facing the backlight module 40, that is, the first array substrate 12 is located above the first liquid crystal layer 13, and the first opposite substrate 11 is located below the first liquid crystal layer 13.

In the present embodiment, the first anti-reflection layer 101 and the second anti-reflection layer 103 are disposed to prevent the scan line, the gate electrode 102, the data line, the source electrode 104 and the drain electrode 105 from reflecting ambient light, so that the contrast of the display device can be improved.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the ninth embodiment, and are not described herein again.

In this document, the terms of upper, lower, left, right, front, rear and the like are used to define the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The liquid crystal display panel comprises a display liquid crystal box (10) and a backlight module (40), and is characterized in that the display liquid crystal box (10) comprises a first opposite substrate (11), a first array substrate (12) and a first liquid crystal layer (13), the first liquid crystal layer (13) is positioned between the first opposite substrate (11) and the first array substrate (12), the first liquid crystal layer (13) comprises liquid crystal molecules (131) and dye liquid crystal molecules (132) which are mixed with each other, the display liquid crystal box (10) is provided with a plurality of first pixel units, first pixel electrodes (122) corresponding to the first pixel units are arranged on the first array substrate (12), and first common electrodes (113) matched with the first pixel electrodes (122) are arranged on the first opposite substrate (11); the display liquid crystal cell (10) is further provided with a quantum dot layer (112) corresponding to the first pixel unit.

2. The liquid crystal display panel according to claim 1, further comprising a first polarizer (31), wherein the first polarizer (31) is located on a side of the display liquid crystal cell (10) facing the backlight module (40) or a side away from the backlight module (40).

3. The liquid crystal display panel according to claim 1, wherein the display liquid crystal cell (10) is provided with a first prism layer (121), and the first prism layer (121) is located on the side of the first liquid crystal layer (13) facing the backlight module (40).

4. The lcd panel of claim 3, wherein the first prism layer (121) has a first rib structure (121a) and a second rib structure (121b), and the first rib structure (121a) and the second rib structure (121b) extend in directions perpendicular to each other.

5. The liquid crystal display panel according to claim 1, further comprising a light management liquid crystal cell (20) between the display liquid crystal cell (10) and the backlight module (40); the light control liquid crystal box (20) is used for controlling the brightness of light rays emitted into the display liquid crystal box (10) by the backlight module (40);

the light control liquid crystal box (20) comprises a second opposite substrate (21), a second array substrate (22) and a second liquid crystal layer (23) located between the second opposite substrate (21) and the second array substrate (22), and the light control liquid crystal box (20) is provided with a plurality of second pixel units, wherein each second pixel unit at least corresponds to one first pixel unit.

6. The liquid crystal display panel according to claim 5, further comprising a first polarizer (31) and a second polarizer (32), wherein the first polarizer (31) is located on one side of the display liquid crystal cell (10) facing the backlight module (40) or on one side of the display liquid crystal cell away from the backlight module (40); the second polarizer (32) is located on the side of the light management liquid crystal cell (20) remote from the display liquid crystal cell (10); the transmission axes of the first polarizer (31) and the second polarizer (32) are perpendicular to each other.

7. The LCD panel according to claim 5, wherein the display liquid crystal cell (10) is provided with a first prism layer (121), the first prism layer (121) being located on a side of the first liquid crystal layer (13) facing the backlight module (40); the light control liquid crystal box (20) is provided with a second prism layer (221), the second prism layer (221) is located on one side, facing the backlight module (40), of the second liquid crystal layer (23), and the rib direction of the first prism layer (121) is perpendicular to the rib direction of the second prism layer (221).

8. The LCD panel according to claim 1 or 5, wherein the quantum dot layer (112) is located on the side of the first liquid crystal layer (13) facing the backlight module (40).

9. The LCD panel according to claim 1 or 5, wherein the first array substrate (12) is located on the side of the first LC layer (13) away from the backlight module (40), and the first counter substrate (11) is located on the side of the first LC layer (13) towards the backlight module (40);

the first array substrate (12) is provided with a first anti-reflection layer (101), a scanning line, a grid electrode (102), a second anti-reflection layer (103), a data line, a source electrode (104) and a drain electrode (105), the first anti-reflection layer (101) covers one side, away from the backlight module (40), of the scanning line and the grid electrode (102), and the second anti-reflection layer (103) covers one side, away from the backlight module (40), of the data line, the source electrode (104) and the drain electrode (105).

10. A display device comprising the liquid crystal display panel according to any one of claims 1 to 9.