A display device based on electro - controlled dimming

Abstract

The present application discloses a display device based on electro - controlled dimming, which includes an electro - controlled dimming liquid crystal cover plate. A beam splitting prism with a right - angled triangular cross - section is arranged inside the electro - controlled dimming liquid crystal cover plate. A light absorption surface facing the inclined surface is placed adjacent to the bottom of the inclined surface of the beam splitting prism. A light source is also arranged on the side of the beam splitting prism away from the electro - controlled dimming liquid crystal cover plate. The electro - controlled dimming liquid crystal cover plate is also connected with an electro - controlled dimming component, and the electro - controlled dimming component is used to control the electro - controlled dimming liquid crystal cover plate to be in an overall transparent state when the light source is turned off, so that the external light entering the electro - controlled dimming liquid crystal cover plate is reflected by the beam splitting prism to the light absorption surface and absorbed. The above - mentioned display device based on electro - controlled dimming provided by the present application can achieve the effects of integrated black dynamic display and off - screen aesthetics on the basis of reducing display energy consumption and being more environmentally friendly.

Description

Technical Field

[0001] The present invention belongs to the technical field of in-vehicle display devices, and particularly relates to a display device based on electro-controlled dimming. Background Art

[0002] With the progress of technology, the carbon emissions caused by human activities are also increasing day by day, and the earth's ecology is facing threats. At present, China has entered a new stage of development. Actively promoting carbon peak and carbon neutrality helps to improve the international competitiveness of industrial technologies, and green and low-carbon products are the future trend.

[0003] Most of the existing integrated black beacon products use a black ink coating + transparent material / black material as the cover plate, and use high-energy-consuming LED and other light sources for lighting for a long time. This is to achieve the purposes of "integrated black" and "off-screen aesthetics", that is, when the product is powered off or closed, the display area / beacon character area of the display screen forms the same color as the surrounding black non-luminous area, producing an integrated effect. It can be seen that achieving this effect requires a large increase in the power consumption of the product, resulting in serious waste of energy and very poor environmental protection effects. Summary of the Invention

[0004] To solve the above problems, the present invention provides a display device based on electro-controlled dimming, which can achieve the effects of integrated black dynamic display and off-screen aesthetics on the basis of reducing display energy consumption and being more green and environmentally friendly.

[0005] A display device based on electro-controlled dimming provided by the present invention includes an electro-controlled dimming liquid crystal cover plate. A beam splitting prism with a right-angled triangle cross-section is arranged inside the electro-controlled dimming liquid crystal cover plate. A light absorption surface facing the inclined surface is placed at the bottom of the inclined surface of the beam splitting prism. A light source is also arranged on the side of the beam splitting prism away from the electro-controlled dimming liquid crystal cover plate. The electro-controlled dimming liquid crystal cover plate is also connected with an electro-controlled dimming component. The electro-controlled dimming component is used to control the electro-controlled dimming liquid crystal cover plate to be in an overall transparent state when the light source is turned off, so that the external light entering the electro-controlled dimming liquid crystal cover plate is reflected by the beam splitting prism to the light absorption surface and absorbed. And when the light source is turned on, it controls the character area of the electro-controlled dimming liquid crystal cover plate to switch to a scattering state, so that the light of the light source passes through the beam splitting prism and then passes through the character area, and the character area is used to reflect the external light to increase the brightness of the character area.

[0006] Preferably, in the above display device based on electro-controlled dimming, the electro-controlled dimming liquid crystal cover plate is a PDLC cover plate.

[0007] Preferably, in the above display device based on electro-controlled dimming, the light source is an LED.

[0008] Preferably, in the above-described display device based on electro-controlled dimming, the light source is a light source with a power of 0.1 mW to 1 W.

[0009] Preferably, in the above-described display device based on electro-controlled dimming, the light absorption surface is a carbon black coating.

[0010] Preferably, in the above-described display device based on electro-controlled dimming, the inclination angle of the inclined surface of the beam splitting prism is 30° to 45°.

[0011] Preferably, in the above-described display device based on electro-controlled dimming, the electro-controlled dimming liquid crystal cover plate is embedded in the black decorative board.

[0012] Preferably, in the above-described display device based on electro-controlled dimming, the surface of the black decorative board has a carbon black coating.

[0013] As can be seen from the above description, in the above-described display device based on electro-controlled dimming provided by the present invention, since it includes an electro-controlled dimming liquid crystal cover plate, a beam splitting prism with a right-angled triangle cross-section is provided inside the electro-controlled dimming liquid crystal cover plate, a light absorption surface facing the inclined surface is placed adjacent to the bottom of the inclined surface of the beam splitting prism, a light source is further provided on the side of the beam splitting prism away from the electro-controlled dimming liquid crystal cover plate, the electro-controlled dimming liquid crystal cover plate is further connected to an electro-controlled dimming component, and the electro-controlled dimming component is used to control the electro-controlled dimming liquid crystal cover plate to be in an overall transparent state when the light source is turned off so that the external light entering the electro-controlled dimming liquid crystal cover plate is reflected by the beam splitting prism to the light absorption surface and absorbed, and when the light source is turned on, it controls the character area of the electro-controlled dimming liquid crystal cover plate to switch to a scattering state so that the light of the light source passes through the beam splitting prism and then passes through the character area, and the character area is used to reflect the external light to increase the brightness of the character area. It can be seen that when the characters are not displayed, the display device shows a completely black state to the outside, which is consistent with the surrounding colors. When it is necessary to display, the area other than the characters continues to be transparent, only the character area is in a scattering state, and the light emitted by the light source passes through the beam splitting prism and irradiates on the dimming liquid crystal cover plate, so that the luminous characters can be seen by the outside. Moreover, the scattering performance of the character area can realize the reflection of the external light to increase the brightness of the character area, so that a character display effect with a larger brightness can be achieved by using a light source with a smaller brightness. Therefore, this solution can achieve the effects of integrated black dynamic display and off-screen aesthetics on the basis of reducing display energy consumption and being more environmentally friendly. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0015] Figure 1 Schematic diagram of an embodiment of a display device based on electro - controlled dimming provided by the present invention in the non - display state;

[0016] Figure 2 Schematic diagram of an embodiment of a display device based on electro - controlled dimming provided by the present invention in the display state. Detailed implementation manners

[0017] The core of the present invention is to provide a display device based on electro - controlled dimming, which can achieve the effects of integrated black dynamic display and off - screen aesthetics on the basis of reducing display energy consumption and being more environmentally friendly.

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] An embodiment of a display device based on electro - controlled dimming provided by the present invention is as Figure 1 and Figure 2 shown, Figure 1 Schematic diagram of an embodiment of a display device based on electro - controlled dimming provided by the present invention in the non - display state, Figure 2Schematic diagram of an embodiment of a display device based on electrically controlled dimming in a display state provided by the present invention. The display device includes an electrically controlled dimming liquid crystal cover plate 1, which can be embedded in a black decorative plate 6. The black decorative plate 6 is made of an opaque dark material and can only reflect a small amount of external light and cannot transmit the light emitted by the light source. A beam splitting prism 2 with a right triangle cross-section is arranged on the inner side of the electrically controlled dimming liquid crystal cover plate 1. A light absorption surface 3 facing the inclined surface is placed adjacent to the bottom of the inclined surface of the beam splitting prism 2. The material of the light absorption surface 3 is not limited as long as it can completely absorb the incident light without reflection. A light source 4 is also arranged on the side of the beam splitting prism 2 away from the electrically controlled dimming liquid crystal cover plate 1. The light source 4 can be but is not limited to LED, LCD, etc., and can be selected according to actual needs. It is used to transmit light upward. After passing through the beacon character layer, it transmits information to the user, and the luminous intensity is controlled by the electric control unit. The electrically controlled dimming liquid crystal cover plate 1 is also connected to an electrically controlled dimming component 5. The electrically controlled dimming component 5 is used to control the electrically controlled dimming liquid crystal cover plate 1 to be in an overall transparent state when the light source 4 is turned off, so that the external light entering the electrically controlled dimming liquid crystal cover plate 1 is reflected by the beam splitting prism 2 to the light absorption surface 3 and absorbed. Since all the external light is absorbed after entering the light absorption surface, the electrically controlled dimming liquid crystal cover plate looks black from the outside at this time, and the integrated black effect with the same color as the surrounding black decorative plate 6 is achieved. And as Figure 2 shown, when the light source 4 is turned on, the character area of the electrically controlled dimming liquid crystal cover plate 1 is controlled to switch to a scattering state so that the light of the light source 4 passes through the beam splitting prism 2 and then passes through the character area, enabling the external to see the displayed characters. At this time, the non-character area continues to maintain the effect of being black from the outside, and the character area is used to reflect the external light to increase the brightness of the character area. As shown by the scattering arrows in Figure 2 , this achieves the effect of improving the character brightness. Thus, in the case of needing to achieve the same brightness, this solution can use a light source with lower power consumption than the prior art, thereby saving energy consumption.

[0020] As can be seen from the above description, in the embodiment of the display device based on electro - controlled dimming provided by the present invention, since it includes an electro - controlled dimming liquid crystal cover plate, a beam - splitting prism with a right - angled triangular cross - section is arranged on the inner side of the electro - controlled dimming liquid crystal cover plate. A light - absorbing surface facing the inclined surface is placed adjacent to the bottom of the inclined surface of the beam - splitting prism. A light source is also arranged on the side of the beam - splitting prism away from the electro - controlled dimming liquid crystal cover plate. The electro - controlled dimming liquid crystal cover plate is also connected to an electro - controlled dimming component. The electro - controlled dimming component is used to control the electro - controlled dimming liquid crystal cover plate to be in an overall transparent state when the light source is turned off, so that the external light entering the electro - controlled dimming liquid crystal cover plate is reflected by the beam - splitting prism to the light - absorbing surface and absorbed. And when the light source is turned on, it controls the character area of the electro - controlled dimming liquid crystal cover plate to switch to a scattering state, so that the light of the light source passes through the beam - splitting prism and then passes through the character area. And the character area is used to reflect the external light to increase the brightness of the character area. It can be seen that when not displaying, a completely black state is shown to the outside world. And when displaying, only the character area is in a scattering state. Therefore, it can realize the reflection of external light to increase the brightness of the character area, so that a character display with a large brightness can be realized by using a light source with a small brightness. Thus, this solution can achieve the effect of integrated black dynamic display and off - screen aesthetics on the basis of reducing display energy consumption and being more environmentally friendly.

[0021] In a specific embodiment of the above - mentioned display device based on electro - controlled dimming, the electro - controlled dimming liquid crystal cover plate can preferably be a PDLC cover plate. This PDLC is a material formed by mixing low - molecular liquid crystal (abbreviated as LC) with prepolymer Kuer UV65 glue, and through a polymerization reaction under certain conditions, micron - level liquid crystal droplets are uniformly dispersed in a polymer network. Then, by utilizing the dielectric anisotropy of liquid crystal molecules, a material with electro - optical response characteristics is obtained. It mainly works between a scattering state and a transparent state and has a certain gray scale. When using this PDLC cover plate, when the power is turned off, the liquid crystal molecules inside the PDLC cover plate will present an irregular dispersion state, making the light unable to penetrate, showing an opaque appearance. When the power is turned on, the PDLC cover plate becomes transparent and all the light passes through. Of course, other types of materials can also be selected according to actual needs, and it is not limited here.

[0022] In another specific embodiment of the above - mentioned display device based on electro - controlled dimming, the above - mentioned light source 4 can preferably be an LED. Further, the light source 4 can be a light source with a power of 0.1 mW to 1 W. In this way, it replaces the high - power light source in the prior art, can reduce the average energy consumption of the light beacon, and is more environmentally friendly.

[0023] In yet another specific embodiment of the above-described display device based on electro-controlled dimming, the light absorption surface 3 may be a carbon black coating, which has a better light absorption effect, thus better achieving the integrated black effect. Of course, other materials can also be selected to make the light absorption surface according to actual needs, and it is not limited here.

[0024] When specifically implementing the above embodiment, the inclination angle of the inclined surface of the beam splitting prism 2 can preferably be 30° to 45°, and the light transmittance and reflectance can be achieved by fine-tuning the inclination angle. Of course, this angle can also be selected according to actual needs, and it is not limited here.

[0025] Those skilled in the art can also, according to actual needs, set a carbon black coating on the surface of the black decorative plate, so that it can better absorb external light, thereby making its display effect more consistent with that of the electro-controlled dimming liquid crystal cover plate 1 in the off-screen state, bringing a better experience to users.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display device based on electro - controlled dimming, characterized in that, It includes an electronically controlled dimming liquid crystal cover plate. Inside the electronically controlled dimming liquid crystal cover plate, a beam splitting prism with a right triangle cross-section is provided. A light absorption surface facing the inclined surface is placed adjacent to the bottom of the inclined surface of the beam splitting prism. The hypotenuse of the beam splitting prism faces the electronically controlled dimming liquid crystal cover plate. A light source is also provided on the side of the beam splitting prism away from the electronically controlled dimming liquid crystal cover plate. The electronically controlled dimming liquid crystal cover plate is also connected to an electronically controlled dimming component. The electronically controlled dimming component is used to control the electronically controlled dimming liquid crystal cover plate to be in an overall transparent state when the light source is turned off, so that the external light entering the electronically controlled dimming liquid crystal cover plate is reflected by the beam splitting prism to the light absorption surface and absorbed. And when the light source is turned on, it controls the character area of the electronically controlled dimming liquid crystal cover plate to switch to a scattering state, so that the light of the light source passes through the beam splitting prism and then passes through the character area, and the character area is used to reflect the external light to increase the brightness of the character area.

2. The display device based on electro - controlled dimming according to claim 1, characterized in that, The electronically controlled dimming liquid crystal cover plate is a PDLC cover plate.

3. The display device based on electro - controlled dimming according to claim 1, characterized in that, The light source is an LED.

4. The display device based on electro - controlled dimming according to claim 3, characterized in that, The light source is a light source with a power of 0.1 mW to 1 W.

5. The display device based on electro - controlled dimming according to claim 1, characterized in that, The light absorption surface is a carbon black coating.

6. The display device based on electro - controlled dimming according to claim 1, characterized in that, The inclination angle of the inclined surface of the beam splitting prism is 30° to 45°.

7. The display device based on electro - controlled dimming according to claim 1, characterized in that, The electronically controlled dimming liquid crystal cover plate is embedded in a black decorative plate.

8. The display device based on electro - controlled dimming according to claim 7, characterized in that, The surface of the black decorative plate has a carbon black coating.

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