阅读说明：本技术 一种显示装置和显示屏 (Display device and display screen ) 是由 李流民 刘航 于 2021-08-26 设计创作，主要内容包括：本发明实施例公开了一种显示装置和显示屏。显示装置包括：背光模组,用于提供背光光源；第一偏光片,位于背光模组的一侧,用于将背光光源转化为偏振光；电致变色层,位于背光模组与第一偏光片之间；电致变色层用于通过改变自身的工作状态调节显示装置处于全反射模式或者全透射模式,其中,电致变色层的工作状态包括全反射状态和全透射状态。本实施例的技术方案,实现了显示装置在全反射模式和全透射模式之间的切换,即实现了一种既具有全反射模式又具有全透射模式的显示装置,从而能够满足用户在不同亮光环境中的使用需求。(The embodiment of the invention discloses a display device and a display screen. The display device includes: the backlight module is used for providing a backlight light source; the first polaroid is positioned on one side of the backlight module and used for converting the backlight light source into polarized light; the electrochromic layer is positioned between the backlight module and the first polarizer; the electrochromic layer is used for adjusting the display device to be in a total reflection mode or a full transmission mode by changing the working state of the electrochromic layer, wherein the working state of the electrochromic layer comprises a total reflection state and a full transmission state. According to the technical scheme, the display device is switched between the total reflection mode and the total transmission mode, namely the display device with the total reflection mode and the total transmission mode is realized, so that the use requirements of users in different bright light environments can be met.)

1. A display device, comprising:

the backlight module is used for providing a backlight light source;

the first polaroid is positioned on one side of the backlight module and used for converting the backlight light source into polarized light;

the electrochromic layer is positioned between the backlight module and the first polarizer; the electrochromic layer is used for adjusting the display device to be in a total reflection mode or a full transmission mode by changing the working state of the electrochromic layer, wherein the working state of the electrochromic layer comprises a total reflection state and a full transmission state.

2. The display device according to claim 1, wherein the electrochromic layer comprises a first electrode layer, a second electrode layer, and a gel electrolyte layer, the gel electrolyte layer being located between the first electrode layer and the second electrode layer;

when the potentials of the first electrode layer and the second electrode layer are both at a first potential, the gel electrolyte layer enables the first electrode layer and the second electrode layer to be in a mirror reflection state, so that the electrochromic layer is in a total reflection state;

when the potentials of the first electrode layer and the second electrode layer are both at a second potential, the gel electrolyte layer enables the first electrode layer and the second electrode layer to be in a transparent state, so that the electrochromic layer is in a full-transmission state.

3. The display device according to claim 2, wherein the composition of the gel electrolyte layer comprises silver nitrate, copper chloride, tetrabutylammonium bromide, and dimethyl sulfone.

4. The display device according to claim 3, wherein the thickness of the gel electrolyte layer is 30 μm to 80 μm; the thicknesses of the first electrode layer and the second electrode layer are 0.1 mm to 2 mm.

5. The display device according to claim 3, wherein the first potential is-0.7V to-1.2V, and wherein the second potential is-0.3V to 0.2V.

6. The display device according to claim 1, further comprising: the full-transmission thin film transistor array substrate and the second polaroid are sequentially positioned on one side of the first polaroid, which is far away from the backlight module;

the second polarizer is used for controlling the light intensity of the polarized light emitted from the display device.

7. The display device according to claim 2, wherein the first electrode layer and the second electrode layer each comprise indium tin oxide.

8. The display device according to claim 1, wherein the display device is a liquid crystal display device.

9. The display device according to claim 2, further comprising: a control circuit; the control circuit is respectively connected with the first electrode layer and the second electrode layer; the control circuit is configured to provide a voltage to the first electrode layer and the second electrode layer, so that the first electrode layer and the second electrode layer are both at the first potential or the second potential.

10. A display screen, characterized in that it comprises a display device according to any one of claims 1 to 9.

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display device and a display screen.

Background

The Thin Film Transistor (TFT) array substrate has three modes of full-transmittance, half-transmittance and full-reflectance.

A transflective display device, including a transflective thin film transistor array substrate, is generally used only in an indoor environment. The semi-reflecting and semi-transmitting display device comprises a semi-reflecting and semi-transmitting thin film transistor array substrate which is used outdoors and indoors. The full-reflection display device comprises a full-reflection thin film transistor array substrate, is applied outdoors, is not easy to charge, completely depends on outdoor light reflection, and cannot be used at night outdoors.

In the prior art, for a full-reflection display device, a front backlight is added to a full-reflection mode thin film transistor array substrate, so that the full-reflection display device is suitable for an outdoor night environment, but the effect is poor.

Disclosure of Invention

The embodiment of the invention provides a display device and a display screen, which are used for realizing the display device with a total reflection mode and a total transmission mode, so that the use requirements of users in different bright light environments are met.

In a first aspect, an embodiment of the present invention provides a display device, where the display device includes:

the backlight module is used for providing a backlight light source; the first polaroid is positioned on one side of the backlight module and used for converting the backlight light source into polarized light; the electrochromic layer is positioned between the backlight module and the first polarizer; the electrochromic layer is used for adjusting the display device to be in a total reflection mode or a full transmission mode by changing the working state of the electrochromic layer, wherein the working state of the electrochromic layer comprises a total reflection state and a full transmission state.

Optionally, the electrochromic layer comprises a first electrode layer, a second electrode layer and a gel electrolyte layer, wherein the gel electrolyte layer is located between the first electrode layer and the second electrode layer;

when the potentials of the first electrode layer and the second electrode layer are both at a first potential, the gel electrolyte layer enables the first electrode layer and the second electrode layer to be in a mirror reflection state, so that the electrochromic layer is in a total reflection state;

when the potentials of the first electrode layer and the second electrode layer are both at a second potential, the gel electrolyte layer enables the first electrode layer and the second electrode layer to be in a transparent state, so that the electrochromic layer is in a full-transmission state.

Optionally, the composition of the gel electrolyte layer comprises silver nitrate, copper chloride, tetrabutylammonium bromide and dimethyl sulfone.

Optionally, the thickness of the gel electrolyte layer is 30 μm to 80 μm; the thicknesses of the first electrode layer and the second electrode layer are 0.1 mm to 2 mm.

Optionally, the first potential is-0.7V to-1.2V, and the second potential is-0.3V to 0.2V.

Optionally, the method further includes: the full-transmission thin film transistor array substrate and the second polaroid are sequentially positioned on one side of the first polaroid, which is far away from the backlight module;

the second polarizer is used for controlling the light intensity of the polarized light emitted from the display device.

Optionally, the first electrode layer and the second electrode layer each comprise indium tin oxide.

Optionally, the display device is a liquid crystal display device.

Optionally, the method further includes: a control circuit; the control circuit is respectively connected with the first electrode layer and the second electrode layer; the control circuit is configured to provide a voltage to the first electrode layer and the second electrode layer, so that the first electrode layer and the second electrode layer are both at the first potential or the second potential.

In a second aspect, an embodiment of the present invention further provides a display screen, where the display screen includes the display device according to the first aspect.

The display device and the display screen provided by the embodiment of the invention comprise a backlight module and a first polaroid; the backlight module is used for providing a backlight light source; the first polarizer is positioned at one side of the backlight module and used for converting the backlight source into polarized light. Through setting up the electrochromic layer, the electrochromic layer is located between backlight unit and the first polaroid, the electrochromic layer is used for adjusting display device and is in total reflection mode or full transmission mode through changing self operating condition, wherein the operating condition of electrochromic layer includes total reflection state and full transmission state, this embodiment has realized the switching of display device between total reflection mode and full transmission mode with this, realized a display device who has both total reflection mode and full transmission mode promptly, thereby can satisfy the user demand of user in different bright light environment, for example, make display device switch to total reflection mode in order to be applicable to the environment that light is sufficient, and make display device switch to full transmission mode in order to be applicable to the environment that light is dark.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another display device provided in an embodiment of the invention;

FIG. 3 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a display screen according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 1, the display device includes: a backlight module 10 for providing a backlight source; a first polarizer 30 located at one side of the backlight module 10 for converting the backlight source into polarized light; an electrochromic layer 20 located between the backlight module 10 and the first polarizer 30; the electrochromic layer 20 is used to adjust the display device to be in a total reflection mode or a full transmission mode by changing its operating state, wherein the operating state of the electrochromic layer 20 includes a total reflection state and a full transmission state.

Specifically, the display device may include the backlight module 10, the first polarizer 30 and the display panel, which are sequentially disposed, and the display panel may include a thin film transistor array substrate, for example, a transflective thin film transistor array substrate or a semi-reflective and semi-transmissive thin film transistor array substrate. The backlight module 10 provides a backlight source, the backlight source enters the first polarizer 30 and is converted into polarized light, such as linearly polarized light, by the first polarizer 30, and the polarized light is emitted through the display panel, so that the display device realizes display. The first polarizer 30 may be a lower polarizer of the display device, i.e. a polarizer of the backlight source.

In this embodiment, the display device further includes an electrochromic layer 20, and the operating state of the electrochromic layer 20 includes a total reflection state and a full transmission state. When the electrochromic layer 20 operates in the total reflection state, it assumes a mirror reflection state capable of reflecting ambient light; when the electrochromic layer 20 is operated in the full transmission state, it is in the full transmission state capable of transmitting ambient light, such as a transparent state; the operating state of the electrochromic layer 20 may be switched between a fully reflective state and a fully transmissive state by applying a voltage to the electrochromic layer 20.

Therefore, in the embodiment, the electrochromic layer 20 is disposed between the backlight module 10 and the first polarizer 30, so that when the electrochromic layer 20 works in the full-transmission state, the backlight source can provide light for the display panel through the electrochromic layer 20 and the first polarizer 30, the display device realizes display based on the backlight source, and the display device is in the full-transmission mode. When the electrochromic layer 20 operates in a total reflection state, the backlight source is blocked by the electrochromic layer 20, ambient light incident to the electrochromic layer 20 is reflected by the electrochromic layer 20 and then passes through the first polarizer 30 to serve as a light source of the display panel, the display device realizes display based on the ambient light, and the display device is in a total reflection mode.

In summary, in the display device provided in this embodiment, when the display device is in an environment with sufficient light, the light in the environment is sufficient to provide a light source for the display panel in the display device to enable the display device to implement display, and a backlight light source is not required to provide a light source for the display panel, at this time, the electrochromic layer 20 can be operated in a full reflection state, so that the display device implements display in a full reflection mode; when the display device is in a dark environment, the light in the environment is insufficient to provide a light source for a display panel in the display device, so that the display device can realize display, and a backlight light source is needed to provide a light source for the display panel, so that the electrochromic layer 20 can work in a full transmission state, and the display device can realize display in a full transmission mode; accordingly, the display device with the total reflection mode and the total transmission mode is realized, so that the use requirements of users in different bright light environments can be met.

Fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 2, on the basis of the above embodiments, optionally, the electrochromic layer 20 includes a first electrode layer 21, a second electrode layer 23, and a gel electrolyte layer 22, and the gel electrolyte layer 22 is located between the first electrode layer 21 and the second electrode layer 23. When the potentials of the first electrode layer 21 and the second electrode layer 23 are both at the first potential, the gel electrolyte layer 22 causes both the first electrode layer 21 and the second electrode layer 23 to assume a mirror-reflective state, so that the electrochromic layer 20 is in a fully reflective state. When the potentials of the first electrode layer 21 and the second electrode layer 23 are both at the second potential, the gel electrolyte layer 22 causes both the first electrode layer 21 and the second electrode layer 23 to assume a transparent state, so that the electrochromic layer 20 is in a fully transmissive state.

Specifically, the first electrode layer 21 and the second electrode layer 23 may both be transparent electrode layers. The gel electrolyte layer 22 is formed of metal microparticles and an organic solution. Based on this, when the first electrode layer 21 and the second electrode layer 23 are both provided with the first potential or the second potential, the metal particles in the gel electrolyte layer 22 may be subjected to a chemical reaction, for example, the metal particles in the gel electrolyte layer 22 may be subjected to a reduction reaction, and then deposited on the first electrode layer 21 and the second electrode layer 23, so that the first electrode layer 21 and the second electrode layer 23 are both in a mirror reflection state, and thus the electrochromic layer 20 exhibits a total reflection state; or the metal particles deposited on the first electrode layer 21 and the second electrode layer 23 are oxidized and re-dissolved in the organic solution so that the first electrode layer 21 and the second electrode layer 23 are both in a transparent state, and at this time, the electrochromic layer 20 exhibits a full-transmission state.

On the basis of the above embodiments, optionally, the components of the first electrode layer 21 and the second electrode layer 23 each include Indium Tin Oxide (ITO). The composition of the gel electrolyte layer 22 includes silver nitrate, copper chloride, tetrabutylammonium bromide (TBABr), and dimethyl sulfone (DMSO, C)₂H₆OS)。

Specifically, when both the first electrode layer 21 and the second electrode layer 23 are at the first potential, Ag in the gel electrolyte layer 22⁺And Cu⁺Electrochemical reduction occurs and thus Ag particles and Cu particles are deposited on the first electrode layer 21 and the second electrode layer 23, so that both the first electrode layer 21 and the second electrode layer 23 are in a mirror reflection state, whereby the electrochromic layer 20 exhibits a total reflection state. Wherein Ag in the gel electrolyte layer 22 when the first electrode layer 21 and the second electrode layer 23 are both at the first potential⁺The chemical equation for electrochemical reduction to occur can be referenced by the following formula:

Ag⁺+nBr^-→AgBr_n ^1-n

AgBr_n ^1-n+e^-→Ag+nBr^-

when the first electrode layer 21 and the second electrode layer 23 are both at the second potential, the Ag particles and the Cu particles in the gel electrolyte layer 22 undergo an oxidation reaction, and dissolve into tetrabutylammonium bromide and dimethyl sulfone without being deposited on the first electrode layer 21 and the second electrode layer 23, so that both the first electrode layer 21 and the second electrode layer 23 are switched from the mirror reflection state to the transparent state, and the electrochromic layer 20 exhibits the full transmission state. It is understood that the first electrode layer 21 and the second electrode layer 23 may be other transparent electrode layers, and the components in the gel electrolyte layer 22 may be other organic solvents and metal particles, as long as the function of the electrochromic layer 20 can be sufficiently achieved, which is not limited to the above.

Without changing the first and second potentials, too thick or too high a concentration of the gel electrolyte layer 22 may easily cause too slow a switching speed of the operation state of the electrochromic layer 20 or poor effects of the total reflection state and the full transmission state, or too thin or too low a concentration of the gel electrolyte layer 22 may easily cause poor effects of the total reflection state and the full transmission state. Optionally, the thickness of the gel electrolyte layer 22 is 30 μm to 80 μm; the thicknesses of the first electrode layer 21 and the second electrode layer 23 are 0.1 mm to 2 mm. Wherein the concentration of the metal fine particles in the gel electrolyte layer 22 is 1.5mol/L to 5 mol/L. In this way, the better effects of the fully reflective state and the fully transmissive state of the electrochromic layer 20 are ensured, while ensuring a moderate switching speed of the operating state of the electrochromic layer 20. In addition, optionally, the first potential is-0.7V to-1.2V, and the second potential is-0.3V to 0.2V, so as to further ensure that the electrochromic layer 20 fully realizes the function thereof.

On the basis of the foregoing embodiments, optionally, the display device further includes: a control circuit; the control circuit is connected with the first electrode layer 21 and the second electrode layer 23 respectively; the control circuit is configured to supply a voltage to the first electrode layer 21 and the second electrode layer 23 so that both the first electrode layer 21 and the second electrode layer 23 are at the first potential or the second potential. Wherein the control circuit may be provided on a flexible circuit board in the display device or independently. According to the technical scheme of the embodiment, after the electrochromic layer 20 is arranged, the display device can be switched between the full-reflection mode and the full-transmission mode only by simply controlling the potential of the electrochromic layer 20, and the display device is simple and practical.

Fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 3, on the basis of the above embodiments, optionally, the display device further includes: the full-transparent thin film transistor array substrate 40 and the second polarizer 50 are sequentially positioned on one side of the first polarizer 30, which is far away from the backlight module 10; the second polarizer 50 is used to control the intensity of polarized light emitted from the display device. The full-transparent thin film transistor array substrate 40 may be located in the display panel, and the full-transparent thin film transistor array substrate 40 may transmit incident ambient light; the second polarizer 50 is used for analyzing the polarized light emitted from the display panel, so as to control the intensity of the polarized light emitted from the display device, and the display device can realize colorful display, and the second polarizer 50 can be understood as an upper polarizer of the display device, that is, an analyzer of the backlight source.

That is, when the display device is in an environment with sufficient light, the electrochromic layer 20 may operate in a total reflection state, the backlight source is blocked by the electrochromic layer 20, ambient light incident to the electrochromic layer 20 is reflected by the electrochromic layer 20 and then exits through the first polarizer 30, the full-transmission thin film transistor array substrate 40, and the second polarizer 50 in sequence, the display device realizes display based on the ambient light, and the display device is in a total reflection mode; when the display device is in a dark environment, the electrochromic layer 20 can be operated in a full transmission state, the backlight source sequentially passes through the electrochromic layer 20, the first polarizer 30, the full-transmission thin film transistor array substrate 40 and the second polarizer 50 to be emitted, the display device realizes display based on the backlight source, and the display device is in a full transmission mode.

On the basis of the above embodiments, the display device is optionally a liquid crystal display device. The liquid crystal display device can comprise a liquid crystal display panel, and the liquid crystal display panel can comprise a full-transparent thin film transistor array substrate 40, a liquid crystal layer and a color film substrate which are sequentially arranged; the backlight module 10 is used for providing backlight light to the liquid crystal display panel through the first polarizer 30.

The embodiment of the invention also provides a display screen. Fig. 4 is a schematic structural diagram of a display screen according to an embodiment of the present invention, and referring to fig. 4, the display screen 100 includes a display device according to any of the above-mentioned technical solutions. The display screen and the display device provided by the embodiment of the invention belong to the same inventive concept, can realize the same technical effect, and repeated contents are not repeated herein.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.