Transparent display device

Abstract

The invention discloses a transparent display device, and relates to the field of liquid crystal display, the transparent display device comprises a surface substrate layer, a bottom substrate layer, a liquid crystal layer and at least one ultraviolet-proof layer, the surface substrate layer comprises a surface transparent substrate and a surface electrode arranged on the surface transparent substrate; the bottom substrate layer comprises a bottom transparent substrate and a bottom electrode arranged on the bottom transparent substrate; the liquid crystal layer is arranged between the surface substrate layer and the bottom substrate layer, dichroism dye molecules are doped in the liquid crystal layer, and when voltage is applied to the surface electrode and the bottom electrode, the absorption capacity of the dichroism dye molecules to incident light is lower than the absorption capacity of the dichroism dye molecules to the incident light when the voltage is not applied to the surface electrode and the bottom electrode. The display brightness can be improved, and the good visual effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display, and in particular to a transparent display device. Background Art

[0002] Liquid crystal display is a modern display technology with a wide range of applications. Traditional liquid crystal display devices mostly use polarizers attached to the surface glass and bottom glass to display dark and bright colors, such as the transflective liquid crystal display with a black background provided by Chinese patent CN201921733924.7, which includes a liquid crystal display surface full-transparent polarizer, a liquid crystal display surface glass, a liquid crystal display bottom glass, and a liquid crystal display bottom semi-transparent polarizer arranged in sequence. When the display is driven without voltage, the liquid crystal molecules are parallel to the surface glass substrate and the bottom glass substrate, and the upper and lower layers of liquid crystal molecules form a 90-degree twist. When light passes through the surface polarizer, light in other directions is absorbed, and only light consistent with the polarization direction of the polarizer passes through to form polarized light. After the polarized light is twisted by the liquid crystal molecules, the polarized light is absorbed by the bottom polarizer, presenting a black background. When driven by voltage, the liquid crystal molecules are perpendicular to the surface glass substrate and the bottom glass substrate. When light passes through the surface polarizer, light in other directions is absorbed, and only light in the same direction as the polarization of the polarizer passes through to form polarized light. When powered on, the liquid crystal molecules are not twisted. The polarized light can pass through the bottom polarizer, be reflected by the semi-transparent membrane, and pass through the bottom polarizer, liquid crystal layer, and surface polarizer again to present bright display fonts. Since the polarizer itself has polarization and shading effects, the transmittance of the display device is low when powered on. It is generally used in low-brightness indoor environments. When used in high-brightness outdoor environments, there are problems of low brightness and poor visual effects. Summary of the invention

[0003] The purpose of the present invention is to provide a transparent display device to solve the problems existing in the prior art, to improve the display brightness, to meet the use requirements in high-brightness environments, and to have a better visual effect.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a transparent display device, comprising:

[0006] A surface substrate layer, the surface substrate layer comprising a surface transparent substrate and a surface electrode disposed on the surface transparent substrate;

[0007] A bottom substrate layer, the bottom substrate layer comprising a bottom transparent substrate and a bottom electrode disposed on the bottom transparent substrate;

[0008] A liquid crystal layer, wherein the liquid crystal layer is arranged between the surface substrate layer and the bottom substrate layer, the liquid crystal layer is doped with dichroic dye molecules, and when a voltage is applied to the surface electrode and the bottom electrode, the absorption capacity of the dichroic dye molecules to the incident light is lower than the absorption capacity of the dichroic dye molecules to the incident light when no voltage is applied to the surface electrode and the bottom electrode.

[0009] Preferably, the dichroic dye molecule is a black dichroic dye molecule, and the absorption capacity of the dichroic dye molecule to incident light along the long axis direction is lower than the absorption capacity of the dichroic dye molecule to incident light along the short axis direction.

[0010] Preferably, when no voltage is applied to the surface electrode and the bottom electrode, the liquid crystal molecules and the dichroic dye molecules in the liquid crystal layer are twisted and arranged.

[0011] Preferably, when voltage is applied to the surface electrode and the bottom electrode and a magnetic field is generated, the arrangement orientation of the liquid crystal molecules and the dichroic dye molecules in the liquid crystal layer is the same as the direction of the magnetic field.

[0012] Preferably, at least one anti-ultraviolet layer is further included, and the anti-ultraviolet layer is disposed on the side of the surface substrate layer away from the liquid crystal layer and / or the side of the bottom substrate layer away from the liquid crystal layer.

[0013] Preferably, the anti-ultraviolet layer is a double-layer layer, and one anti-ultraviolet layer is disposed on the side of the surface substrate layer away from the liquid crystal layer and one anti-ultraviolet layer is disposed on the side of the bottom substrate layer away from the liquid crystal layer.

[0014] Preferably, the liquid crystal twist angle of the liquid crystal layer is 80° to 100°.

[0015] Preferably, the liquid crystal dielectric constant of the liquid crystal layer is 3-15.

[0016] Preferably, the thickness of the liquid crystal layer is 4.0 um to 15.0 um.

[0017] Preferably, the liquid crystal pretilt angle of the liquid crystal layer is 1° to 7°.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The present invention provides a transparent display device, comprising a surface substrate layer, a bottom substrate layer, a liquid crystal layer and at least one layer of anti-ultraviolet layer, wherein dichroic dye molecules are doped in the liquid crystal layer, and when a voltage is applied to the surface electrode and the bottom electrode, the absorption capacity of the dichroic dye molecules to incident light is lower than when no voltage is applied to the surface electrode and the bottom electrode; the anti-ultraviolet layer is arranged on the side of the surface substrate layer away from the liquid crystal layer and / or the side of the bottom substrate layer away from the liquid crystal layer. The dichroic dye molecules absorb visible light differently along the long axis direction and the short axis direction, and after the dichroic dye molecules are doped in the liquid crystal layer, the dichroic dye molecules will remain arranged in the same direction as the liquid crystal molecules. When no voltage is applied to the surface electrode and the bottom electrode, the dichroic dye molecules have a strong absorption capacity for incident light, the incident light transmittance is greatly reduced, and the transparent display device presents a dark state, that is, the background color of the transparent display device is dark; when voltage is applied to the surface electrode and the bottom electrode, the dichroic dye molecules have a strong absorption capacity for incident light, the incident light transmittance is high, and the transparent display device presents a bright state, that is, the display color of the transparent display device is bright, thereby realizing black and white contrast display. When the above transparent display device is powered on, the transmittance is as high as 50%, while the transmittance of the polarizer is only 10% to 20%, the display brightness is high, and it is especially suitable for use in high-brightness environments, and has a good visual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A display principle diagram of the transparent display device provided in the embodiment when no voltage is applied;

[0022] Figure 2 A display principle diagram of the transparent display device provided in the embodiment when voltage is applied;

[0023] Figure 3 A schematic diagram of the structure of a transparent display device provided in an embodiment Figure 1 (An anti-ultraviolet layer is provided on the surface substrate layer);

[0024] Figure 4 A schematic diagram of the structure of a transparent display device provided in an embodiment Figure 1 (An anti-ultraviolet layer is provided on the bottom substrate layer);

[0025] Figure 5 A schematic diagram of the structure of a transparent display device provided in an embodiment Figure 1 (An anti-ultraviolet layer is provided on the surface substrate layer and the bottom substrate layer);

[0026] In the figure: 100, transparent display device; 1, surface substrate layer; 2, bottom substrate layer; 3, liquid crystal layer; 301, dichroic dye molecules; 302, liquid crystal molecules; 4, UV protection layer. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a transparent display device to solve the problems existing in the prior art, to improve the display brightness, to meet the use requirements in high-brightness environments, and to have a better visual effect.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-5 As shown, this embodiment provides a transparent display device 100, including a surface substrate layer 1, a bottom substrate layer 2 and a liquid crystal layer 3, wherein the surface substrate layer 1 includes a surface transparent substrate and a surface electrode disposed on the surface transparent substrate; the bottom substrate layer 2 includes a bottom transparent substrate and a bottom electrode disposed on the bottom transparent substrate; the liquid crystal layer 3 is disposed between the surface substrate layer 1 and the bottom substrate layer 2, and the liquid crystal layer 3 is doped with dichroic dye molecules 301, and when a voltage is applied to the surface electrode and the bottom electrode, the absorption capacity of the dichroic dye molecules 301 to the incident light is lower than the absorption capacity of the dichroic dye molecules 301 to the incident light when no voltage is applied to the surface electrode and the bottom electrode. The dichroic dye molecules 301 absorb visible light differently along the long axis direction and the short axis direction, and after the dichroic dye molecules 301 are doped into the liquid crystal layer 3, the dichroic dye molecules 301 will remain arranged in the same direction as the liquid crystal molecules 302. When no voltage is applied to the surface electrode and the bottom electrode, the dichroic dye molecules 301 have a strong absorption capacity for incident light, the incident light transmittance is greatly reduced, and the transparent display device 100 presents a dark state, that is, the background color of the transparent display device 100 is dark; when a voltage is applied to the surface electrode and the bottom electrode, the dichroic dye molecules 301 have a strong absorption capacity for incident light, the incident light transmittance is high, and the transparent display device 100 presents a bright state, that is, the display color of the transparent display device 100 is bright, thereby realizing black and white contrast display. When the above transparent display device 100 is powered on, the transmittance is as high as 50%, while the transmittance of the polarizer is only 10% to 20%, the display brightness is high, and it is especially suitable for use in high-brightness environments, and has a good visual effect.

[0031] In this embodiment, the dichroic dye molecule 301 is a black dichroic dye molecule 301. The absorption capacity of the dichroic dye molecule 301 to incident light along the long axis direction is lower than the absorption capacity of the dichroic dye molecule 301 to incident light along the short axis direction.

[0032] In this embodiment, when no voltage is applied to the surface electrode and the bottom electrode, the liquid crystal molecules 302 and the dichroic dye molecules 301 of the liquid crystal layer 3 are twisted and arranged. When no power is applied, the dichroic dye molecules 301 are twisted and arranged along with the liquid crystal molecules 302, and the incident light passes through the short axis direction of the dichroic dye molecules 301. Since the dichroic dye molecules 301 have a strong absorption capacity for the incident light along the short axis direction, the incident light transmittance is low, and the transparent display device 100 presents a dark state.

[0033] In this embodiment, when voltage is applied to the surface electrode and the bottom electrode and a magnetic field is generated, the arrangement orientation of the liquid crystal molecules 302 and the dichroic dye molecules 301 of the liquid crystal layer 3 is the same as the direction of the magnetic field. In the power-on state, the liquid crystal molecules 302 will be deflected under the action of the electric field and arranged in the direction of the electric field. The dichroic dye molecules 301 are driven by the liquid crystal molecules 302 to be deflected, and the dichroic dye molecules 301 are also arranged in the direction of the electric field. The incident light passes through the long axis direction of the dichroic dye molecules 301. At this time, the dichroic dye molecules 301 have a relatively weak ability to absorb light, and the light transmittance is relatively high, and the transparent display device 100 is in a bright state.

[0034] In this embodiment, at least one layer of anti-ultraviolet layer 4 is further included, and the side of the surface substrate layer 1 away from the liquid crystal layer 3 and / or the side of the bottom substrate layer 2 away from the liquid crystal layer 3 is provided with the anti-ultraviolet layer 4. The anti-ultraviolet layer 4 can prevent ultraviolet rays from damaging the transparent display device 100, thereby improving the performance of the product and extending its service life.

[0035] In this embodiment, the anti-ultraviolet layer 4 is composed of two layers, and one layer of anti-ultraviolet layer 4 is disposed on the side of the surface substrate layer 1 away from the liquid crystal layer 3 and the side of the bottom substrate layer 2 away from the liquid crystal layer 3. The anti-ultraviolet layer 4 on the surface substrate layer 1 can be used to resist ultraviolet rays in the external environment, and the anti-ultraviolet layer 4 on the bottom substrate layer 2 can be used to resist ultraviolet rays in the backlight, thereby improving the protection effect.

[0036] In this embodiment, the twist angle of the liquid crystal in the liquid crystal layer 3 is 80° to 100°.

[0037] In this embodiment, the liquid crystal dielectric constant of the liquid crystal layer 3 is 3-15.

[0038] In this embodiment, the thickness of the liquid crystal layer 3 is 4.0 um to 15.0 um.

[0039] In this embodiment, the liquid crystal pre-tilt angle of the liquid crystal layer 3 is 1° to 7°.

[0040] In this embodiment, the surface transparent substrate is a surface glass, and the bottom transparent substrate is a bottom glass.

[0041] The transparent display device 100 in this embodiment can replace the LED lamp in the existing taillight. When the taillight is not powered on, it is dark, and when powered on, it is bright, which can diversify the display content and has a good display effect. It has the advantages of high display brightness and diversified display images, which can enhance the competitiveness of the product in the market. It should be noted that the transparent display device 100 in this embodiment is not limited to taillights, but can also be applied to various display devices such as display screens.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A transparent display device, characterized in that: include: A surface substrate layer, the surface substrate layer comprising a surface transparent substrate and a surface electrode disposed on the surface transparent substrate; A bottom substrate layer, the bottom substrate layer comprising a bottom transparent substrate and a bottom electrode disposed on the bottom transparent substrate; A liquid crystal layer, wherein the liquid crystal layer is arranged between the surface substrate layer and the bottom substrate layer, the liquid crystal layer is doped with dichroic dye molecules, and when a voltage is applied to the surface electrode and the bottom electrode, the absorption capacity of the dichroic dye molecules to the incident light is lower than the absorption capacity of the dichroic dye molecules to the incident light when no voltage is applied to the surface electrode and the bottom electrode.

2. The transparent display device according to claim 1, characterized in that: The dichroic dye molecules are black dichroic dye molecules, and the absorption capacity of the dichroic dye molecules to incident light along the long axis direction is lower than the absorption capacity of the dichroic dye molecules to incident light along the short axis direction.

3. The transparent display device according to claim 1, characterized in that: When no voltage is applied to the surface electrode and the bottom electrode, the liquid crystal molecules and the dichroic dye molecules in the liquid crystal layer are twisted and arranged.

4. The transparent display device according to claim 1, characterized in that: When voltage is applied to the surface electrode and the bottom electrode and a magnetic field is generated, the arrangement orientation of the liquid crystal molecules and the dichroic dye molecules in the liquid crystal layer is the same as the direction of the magnetic field.

5. The transparent display device according to any one of claims 1 to 4, characterized in that: It also includes at least one anti-ultraviolet layer, and the anti-ultraviolet layer is arranged on the side of the surface substrate layer away from the liquid crystal layer and / or the side of the bottom substrate layer away from the liquid crystal layer.

6. The transparent display device according to claim 5, characterized in that: The anti-ultraviolet layer is composed of two layers, and one layer of the anti-ultraviolet layer is disposed on the side of the surface substrate layer away from the liquid crystal layer and the side of the bottom substrate layer away from the liquid crystal layer.

7. The transparent display device according to any one of claims 1 to 4, characterized in that: The liquid crystal twist angle of the liquid crystal layer is 80° to 100°.

8. The transparent display device according to any one of claims 1 to 4, characterized in that: The liquid crystal dielectric constant of the liquid crystal layer is 3-15.

9. The transparent display device according to claim 1, characterized in that: The thickness of the liquid crystal layer is 4.0 um to 15.0 um.

10. The transparent display device according to claim 1, characterized in that: The liquid crystal pre-tilt angle of the liquid crystal layer is 1° to 7°.

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