WO2020133798A1

WO2020133798A1 - Transparent liquid crystal display device

Info

Publication number: WO2020133798A1
Application number: PCT/CN2019/082066
Authority: WO
Inventors: 陈书志; 陈俊吉
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2018-12-25
Filing date: 2019-04-10
Publication date: 2020-07-02
Also published as: CN109407391A; CN109407391B

Abstract

Disclosed is a transparent liquid crystal display device (100), comprising a liquid crystal display panel (2), an upper polarizer (3) and a lower polarizer (4), wherein the upper polarizer (3) is arranged on the liquid crystal display panel (2), and the lower polarizer (4) is arranged on the liquid crystal display panel (2); the liquid crystal display panel (2) comprises a color filter (21), and the color filter (21) is provided with at least one transparent area (211) and at least one light filtering area (212); the upper polarizer (3) comprises at least one first polarization area (21) and at least one second polarization area (22), the first polarization area (21) corresponds to the transparent area (211), and the second polarization area (22) corresponds to the light filtering area (212); and the lower polarizer (4) comprises a third polarization area (41), an absorption axis of the first polarization area (21) is parallel to an absorption axis of the third polarization area (41), and an absorption axis of the second polarization area (22) is perpendicular to the absorption axis of the third polarization area (41).

Description

Transparent liquid crystal display device

Technical field

The invention relates to the field of display technology, in particular to a transparent liquid crystal display device.

Background technique

With the increasing development of display technology, a variety of new technologies continue to emerge, and transparent display technology has attracted more and more attention because of its transparent display panel and its unique application.

A transparent display generally refers to a display that can form a transparent display state so that a viewer can see the image displayed on the display and the scene behind the display. Transparent displays have many possible applications, such as windows in buildings or cars and display windows in shopping malls. In addition to the applications of these large devices, small devices such as handheld tablets can also benefit from transparent displays, for example, enabling users to view maps and view the front scene through the screen.

It is expected that most of the existing display market will be gradually replaced by transparent displays, for example in the fields of construction, advertising and public information.

The transparent display is divided into a head-up display, a transparent liquid crystal display and a transparent organic electroluminescent display. Among these transparent displays, the head-up display is realized by the method of image projection, and the transparent liquid crystal display and the transparent organic electroluminescent display belong to the true sense Transparent display, but transparent display has the disadvantage of low contrast, its contrast is much lower than ordinary display. The reason is that, because the transparent display has a certain degree of light penetration, the background on the rear side of the transparent display can interfere with the image displayed on the transparent display, for example, when the background on the rear side has a pattern overlapping with the image displayed on the transparent display or When presenting similar colors, it is easy to cause negative effects such as poor clarity of the image displayed on the transparent display and visual fatigue of the human eye.

Therefore, how to improve the display effect of the transparent display is one of the problems that the R&D personnel urgently need to solve.

technical problem

An object of the present invention is to provide a transparent display device that uses the absorption axis of the first polarizing region corresponding to the transparent region of the color filter and the absorption axis of the second polarizing region corresponding to the filter region of the color filter, The transparent area can be displayed or rendered transparent without additional thin film transistors.

Technical solution

To achieve the aforementioned object of the invention, an embodiment of the present invention provides a transparent liquid crystal display device including a liquid crystal display panel, an upper polarizer, and a lower polarizer, wherein the upper polarizer is disposed at An upper surface of the liquid crystal display panel, the lower polarizer is disposed on a lower surface of the liquid crystal display panel, and the liquid crystal display panel includes a color filter, the color filter has at least one transparent area And at least one filter region; the upper polarizer includes at least one first polarizing region and at least one second polarizing region, the first polarizing region corresponds to the transparent region, and the first polarizing region and the Transparent regions are in contact, the second polarizing region corresponds to the filter region, and the second polarizing region is in contact with the filter region; the lower polarizer includes a third polarizing region, wherein the An absorption axis of the first polarization zone is parallel to an absorption axis of the third polarization zone, and an absorption axis of the second polarization zone is perpendicular to the absorption axis of the third polarization zone.

In an embodiment of the invention, the transparent area and the filter area are arranged horizontally.

In an embodiment of the invention, the liquid crystal display panel further includes a substrate and a liquid crystal layer, the color filter is disposed opposite to the substrate, and the liquid crystal layer is disposed between the color filter and Between the substrates.

In an embodiment of the invention, the first polarized region is formed by patterning, and the first polarized region is attached to the transparent region.

In an embodiment of the invention, the second polarized region is formed by patterning, and the second polarized region is attached to the filter region.

In an embodiment of the present invention, the transparent liquid crystal display device further includes a backlight module, and the backlight module is disposed below the liquid crystal display panel.

In order to achieve the aforementioned object of the invention, the backlight module is a side-entry backlight module. The side-entry backlight module includes a backlight source and a light guide plate disposed on the side of the backlight source.

In an embodiment of the invention, the backlight module is a direct type backlight module, and the direct type backlight module includes a backlight source and a diffusion plate disposed above the backlight source.

In an embodiment of the invention, the filter area is composed of a plurality of pixels, and each pixel has a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

In an embodiment of the invention, the upper polarizer and the lower polarizer are an elliptical polarizer.

To achieve the aforementioned object of the invention, an embodiment of the present invention provides a transparent liquid crystal display device including a liquid crystal display panel, an upper polarizer, and a lower polarizer, wherein the upper polarizer is disposed at An upper surface of the liquid crystal display panel, the lower polarizer is disposed on a lower surface of the liquid crystal display panel, and the liquid crystal display panel includes a color filter, the color filter has at least one transparent area And at least one filter area; the upper polarizer includes at least a first polarized area and at least a second polarized area, the first polarized area corresponds to the transparent area, the second polarized area and the filter Corresponding to the optical zone; the lower polarizer includes a third polarizing zone, wherein an absorption axis of the first polarizing zone is parallel to an absorption axis of the third polarizing zone, and an absorption axis of the second polarizing zone It is perpendicular to the absorption axis of the third polarizing region.

Beneficial effect

The beneficial effect of the present invention is: the absorption axis of the first polarized area corresponding to the transparent area is perpendicular to the absorption axis of the second polarized area corresponding to the filter area, and the transparent area can be displayed on the screen Or it is transparent without the need for additional thin film transistors, and at the same time improves the display effect of the transparent display device.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only inventions. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a preferred embodiment of a transparent liquid crystal display device according to the present invention.

2 is a cross-sectional view of a preferred embodiment of a transparent liquid crystal display device according to the present invention.

3 is a cross-sectional view of an edge-lit backlight module according to a preferred embodiment of the transparent liquid crystal display device of the present invention.

4 is a cross-sectional view of a direct type backlight module according to a preferred embodiment of the transparent liquid crystal display device of the present invention.

Best Mode of the Invention

The liquid crystal display assembly provided by the embodiments of the present invention has been described in detail above. Specific examples are used to explain the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention. The descriptions of the following embodiments refer to additional drawings to illustrate specific embodiments that can be implemented by the present invention. Directional terms mentioned in the present invention, such as [upper], [lower], [front], [back], [left], [right], [inner], [outer], [side], etc., are for reference only Attach the direction of the schema. Therefore, the directional terminology is used to illustrate and understand the present invention, not to limit the present invention. In the figure, units with similar structures are indicated by the same reference numerals.

Please refer to FIGS. 1 and 2, which are schematic diagrams of a preferred embodiment of the transparent liquid crystal display device of the present invention. The transparent liquid crystal display device 100 includes a liquid crystal display panel 2, an upper polarizer 3 and a lower polarizer 4, wherein the user's eye 101 can see an object 102 through the transparent liquid crystal display device 100. The present invention will describe in detail the detailed structure, assembling relationship and operation principle of the above-mentioned components of each embodiment in the following.

1 and 2, the upper polarizer 3 is disposed on an upper surface of the liquid crystal display panel 2, and the upper polarizer 2 includes at least a first polarizing area 21 and at least a second polarizing area 22. In this embodiment, both the upper polarizer 3 and the lower polarizer 4 are an elliptical polarizer.

1 and 2, the lower polarizer 4 is disposed on the lower surface of the liquid crystal display panel 2, and the lower polarizer 4 includes a third polarizing region 41, in this embodiment, where An absorption axis of the first polarizing region 21 of the upper polarizer 2 is parallel to an absorption axis of the third polarizing region 41 of the lower polarizer 4, the second polarized light of the upper polarizer 2 An absorption axis of the region 22 is perpendicular to the absorption axis of the third polarizing region 41 of the upper polarizer 2.

1 and 2, the liquid crystal display panel 2 includes a color filter 21, a substrate 22 and a liquid crystal layer 23, wherein the color filter 21 has at least one transparent area 211 and at least one filter光区212. In this embodiment, the filter area 212 is composed of a plurality of pixels, wherein each pixel has a red subpixel, a green subpixel, and a blue subpixel (not shown), and the substrate 22 It is a thin film transistor (TFT) array substrate on which TFT components are provided.

1 and 2, specifically, the first polarizing area 21 of the upper polarizer 2 corresponds to the transparent area 211, so that the first polarizing area 21 and the transparent area 211 are in phase In contact, the second polarizing region 22 of the upper polarizer 2 corresponds to the filter region 212, so that the second polarizing region 22 is in contact with the filter region 212. In this embodiment, the transparent area 211 and the filter area 212 of the color filter 21 are arranged horizontally.

With continued reference to FIGS. 1 and 2, further, the color filter 21 is disposed opposite to the substrate 22, and the liquid crystal layer 23 is disposed between the color filter 21 and the substrate 22 . In this embodiment, the first polarizing region 21 is formed by patterning, and the first polarizing region 21 is attached to the transparent region 211. The second polarizing region 22 is formed by patterning, and the second polarizing region 22 is attached to the filter region 212.

1 and 2, the transparent liquid crystal display device 100 further includes a backlight module 5, and the backlight module 5 is disposed below the liquid crystal display panel 2. In this embodiment, the backlight module 5 is an edge-lit backlight module, wherein the edge-lit backlight module includes a backlight 51 and a light guide plate 52, and the light guide plate 52 is provided on the One side of the backlight 51 (see FIG. 3). In other embodiments, the backlight module 5 is a direct type backlight module. The direct type backlight module includes a backlight 51 and a diffusion plate 53. The diffusion plate 53 is disposed on the backlight 51 Above (see Figure 4).

According to the above structure, by using the lower polarizer 4 as the third polarizing region 41, the upper polarizer 2 is divided into the first polarizing region 21 and the second polarizing region 22, and is provided The absorption axis of the first polarization zone 21 is parallel to the absorption axis of the third polarization zone 41, and the absorption axis of the second polarization zone 22 is perpendicular to the absorption axis of the third polarization zone 41, so that the corresponding The absorption axis of the first polarizing region 21 of the transparent region 211 is perpendicular to the absorption axis of the second polarizing region 22 corresponding to the filter region 212. When the transparent liquid crystal display device generally displays a picture, the transparent The area 211 will be darkened to reduce the influence of the background. When the display of the transparent liquid crystal display device is turned off, the transparent area 211 will appear transparent.

With the above design, the absorption axis of the first polarizing region 21 corresponding to the transparent region 211 is perpendicular to the absorption axis of the second polarizing region 22 corresponding to the filter region 212, so that the transparent region The 211 screen is displayed or rendered transparent without the need for additional thin film transistors, and at the same time enhances the display effect of the transparent display device.

The present invention has been described by the above-mentioned related embodiments. However, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are all included in the scope of the present invention.

Claims

A transparent liquid crystal display device includes: the transparent liquid crystal display device includes a liquid crystal display panel, an upper polarizer and a lower polarizer, wherein the upper polarizer is disposed on an upper surface of the liquid crystal display panel The lower polarizer is disposed on the lower surface of the liquid crystal display panel, and the liquid crystal display panel includes a color filter, the color filter has at least one transparent area and at least one filter area;

The upper polarizer includes at least a first polarizing area and at least a second polarizing area, the first polarizing area corresponds to the transparent area, and the first polarizing area is in contact with the transparent area, the The second polarized area corresponds to the filter area, and the second polarized area is in contact with the filter area; and

The lower polarizer includes a third polarizing region, wherein an absorption axis of the first polarizing region is parallel to an absorption axis of the third polarizing region, and an absorption axis of the second polarizing region is parallel to the first The absorption axis of the triple polarization zone is perpendicular.
The transparent liquid crystal display device of claim 1, wherein the transparent area and the filter area are arranged horizontally.
The transparent liquid crystal display device according to claim 1, wherein the liquid crystal display panel further comprises a substrate and a liquid crystal layer, the color filter is disposed opposite to the substrate, and the liquid crystal layer is disposed in the color Between the filter and the substrate.
The transparent liquid crystal display device of claim 3, wherein the first polarized region is formed by patterning, and the first polarized region is attached to the transparent region.
The transparent liquid crystal display device of claim 3, wherein the second polarizing region is formed by patterning, and the second polarizing region is attached to the filter region.
The transparent liquid crystal display device of claim 1, wherein the transparent liquid crystal display device further comprises a backlight module, and the backlight module is disposed below the liquid crystal display panel.
The transparent liquid crystal display device according to claim 6, wherein the backlight module is an edge-lit backlight module, the edge-lit backlight module includes a backlight source and a light guide plate disposed on the side of the backlight source .
The transparent liquid crystal display device according to claim 6, wherein the backlight module is a direct type backlight module, and the direct type backlight module includes a backlight source and a diffusion plate disposed above the backlight source.
The transparent liquid crystal display device of claim 1, wherein the filter area is composed of a plurality of pixels, and each pixel has a red subpixel, a green subpixel, and a blue subpixel.
The transparent liquid crystal display device of claim 1, wherein the upper polarizer and the lower polarizer are an elliptical polarizer.
A transparent liquid crystal display device includes: the transparent liquid crystal display device includes a liquid crystal display panel, an upper polarizer and a lower polarizer, wherein the upper polarizer is disposed on an upper surface of the liquid crystal display panel The lower polarizer is disposed on the lower surface of the liquid crystal display panel, and the liquid crystal display panel includes a color filter, the color filter has at least one transparent area and at least one filter area;

The upper polarizer includes at least a first polarizing region and at least a second polarizing region, the first polarizing region corresponds to the transparent region, and the second polarizing region corresponds to the filter region; and

The lower polarizer includes a third polarizing region, wherein an absorption axis of the first polarizing region is parallel to an absorption axis of the third polarizing region, and an absorption axis of the second polarizing region is parallel to the first The absorption axis of the triple polarization zone is perpendicular.
The transparent liquid crystal display device of claim 11, wherein the transparent area and the filter area are arranged horizontally.
The transparent liquid crystal display device according to claim 11, wherein the liquid crystal display panel further comprises a substrate and a liquid crystal layer, the color filter is disposed opposite to the substrate, and the liquid crystal layer is disposed in the color Between the filter and the substrate.
The transparent liquid crystal display device of claim 13, wherein the first polarized region is formed by patterning, and the first polarized region is attached to the transparent region.
The transparent liquid crystal display device of claim 13, wherein the second polarizing region is formed by patterning, and the second polarizing region is attached to the filter region.
The transparent liquid crystal display device of claim 11, wherein the transparent liquid crystal display device further comprises a backlight module, and the backlight module is disposed below the liquid crystal display panel.
The transparent liquid crystal display device of claim 16, wherein the backlight module is an edge-lit backlight module, the edge-lit backlight module includes a backlight source and a light guide plate disposed on the side of the backlight source .
The transparent liquid crystal display device of claim 16, wherein the backlight module is a direct type backlight module, and the direct type backlight module includes a backlight source and a diffusion plate disposed above the backlight source.
The transparent liquid crystal display device of claim 11, wherein the filter area is composed of a plurality of pixels, and each pixel has a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
The transparent liquid crystal display device of claim 11, wherein the upper polarizer and the lower polarizer are an elliptical polarizer.