Display method of hidden flexible display screen of intelligent cabin

Abstract

The invention discloses a hidden flexible display screen display method of a smart cabin, and relates to the technical field of display screen display, and the method comprises the following steps: S1, light scattering; s2, pixel optimization is carried out; s3, adding a transparent light cone and a light depression; s4, performing multi-view three-dimensional display; and S5, combining the polaroids. The problems that an existing vehicle-mounted panel is too small in display area and poor in visual effect can be effectively solved through the transparent screen technology, the driving comfort and safety of a driver or a passenger are improved, high-speed switching between transparency and scattering can be freely achieved through light scattering and using of a quick response liquid crystal material, and the driving safety is improved. The optical efficiency and the color coverage rate are improved through pixel optimization, the transparency of the transparent screen and the light transmittance of the screen are improved by adding the transparent light cone and the light depression, the imaging quality is improved by using a multi-view three-dimensional display technology, and the durability of the display screen is improved by using a polaroid formed by combining an iodine polaroid and a dye polaroid.

Description

Technical Field

[0001] The present invention relates to the field of display screen technology, and in particular to a hidden flexible display screen display method for a smart cockpit. Background Art

[0002] The accelerated development of the new energy vehicle market has provided strong support for the popularization and promotion of smart cockpit technology. With the vigorous development of the automobile industry and the rapid development of in-vehicle displays, in-vehicle displays are not just simple monochrome displays, but are also developing in the direction of full color, large size and diversification. Using in-vehicle display devices, driving data information, navigation maps, Internet information, audio and video entertainment information and other information can be displayed to enhance user experience. At present, conventional display methods on the market include conventional LCD screen multi-screen interaction and HUD head display. With the continuous upgrading and expansion of in-vehicle screens, multi-screen interaction has become an important development direction of smart cockpits. Through multi-screen interaction, drivers or passengers can obtain multiple information at the same time, improving the comprehensiveness and accuracy of information. Head display technology is another important technology for smart cockpit display solutions, which can project information directly into the field of vision of drivers or passengers without interfering with the line of sight of drivers or passengers. This technology can improve the driving comfort and safety of drivers or passengers.

[0003] Despite this, there are still defects in its application. The HUD display area is limited or even too small, and the display is not clear under bright light, affecting the overall visual effect. Compared with transparent display screens, HUD devices consume high power, have complex structures and generate high heat. The positions and angles of conventional multi-screen interactive displays mostly exceed the visual range or comfortable visual range of the human eye when it concentrates, which can easily cause eye fatigue and danger. Therefore, the technical realization of transparent screens has become possible. Transparent screens are an important technological breakthrough area in the smart cockpit industry. Summary of the invention

[0004] The purpose of the present invention is to provide a hidden flexible display screen display method for a smart cockpit to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a hidden flexible display screen display method for a smart cockpit, comprising the following steps:

[0006] S1. Light scattering: LED light enters from the side of the liquid crystal unit, and the light propagates while being totally internally reflected by the front and rear walls of the liquid crystal unit, achieving high-speed switching between transparent and scattering states;

[0007] S2, pixel optimization: Taking external quantum efficiency EQE, maximum color shift MCS and color gamut coverage CGC as optimization targets, optimize the film thickness of LCD panel, improve optical efficiency and color coverage, and reduce color difference with viewing angle;

[0008] S3. Add transparent light cones and light traps: Add a transparent light cone behind the tiny gaps between pixels and add light traps behind the pixels of the LCD panel to increase the bright field of the display module and improve the display transmittance;

[0009] S4, Multi-view Figure 3 Dimensional display: Splits the display resolution between multiple views to form a spatially multi-channel screen, improving image quality through resolution compensation and tilt lens technology;

[0010] S5. Polarizer combination: A polarizer that combines an iodine-based polarizer with a dye-based polarizer is used to polarize and analyze the light passing through the liquid crystal light valve, thereby improving the penetration efficiency. While obtaining the optical properties of high transmittance and high polarization degree, it has the ability to withstand high temperature and high humidity.

[0011] Preferably, in step S1, when the LCD panel is viewed from the direction facing the screen, it is visually transparent, and when an electric field is applied to the liquid crystal unit, the orientation of the liquid crystal molecules changes, so that the LED light reaching the liquid crystal unit is scattered, and an image is displayed on the LCD panel. At this time, when the LCD panel is viewed from above, the scattered LED light makes the pixels appear visually;

[0012] Using fast-response liquid crystal materials to achieve high-speed switching between transparent and scattering states, the LCD panel can achieve color display using the CFS method, which means that red, green and blue light-emitting diodes are alternately lit, causing the pixels to turn on or off accordingly;

[0013] Fast response liquid crystal material is a liquid crystal material with high birefringence and low viscosity. It is mainly used in liquid crystal optical devices. The response speed of this material is very fast and can meet the demand for fast response in practical applications.

[0014] Preferably, in step S2, the pixel optimization includes an external quantum efficiency optimization algorithm. The external quantum efficiency EQE refers to the ratio of injected charge carriers to output photons at all viewing angles, and is a measure of the overall luminous efficiency of the LCD panel. The external quantum efficiency optimization algorithm is used to effectively improve the light output efficiency of the light-emitting area. The external quantum efficiency algorithm is specifically:

[0015]

[0016] Where EQE represents the external quantum efficiency, including the electrical efficiency, η(·) represents the extraction efficiency, represents the emission spectrum of the emission layer, and λ represents the size parameter of the semiconductor component.

[0017] Preferably, in step S2, the pixel optimization further includes a color gamut coverage optimization algorithm, the color gamut coverage CGC includes the ability to measure color purity and display color, and is used to achieve a better color gamut coverage. The color gamut coverage algorithm is specifically:

[0018]

[0019] Among them, CGC represents the color gamut coverage, A display Indicates the display color gamut of the LCD panel, A stardard Indicates the standard color gamut;

[0020] The maximum color shift MCS contains the angle data when measuring the LCD panel and the maximum distance of RGB in the two-dimensional plane dimension.

[0021] Preferably, in step S2, a backlight brightness determination algorithm is used to adjust the brightness of the backlight source, thereby reducing the power consumption of the backlight source, and at the same time, the transmittance of the LCD is controlled by a pixel compensation change algorithm, and the backlight brightness determination algorithm includes a maximum value method, an average value method, a root mean square method, a standard deviation method, and a mapping function inversion method;

[0022] The pixel compensation transformation algorithm is:

[0023] x'=min{x / β 1 / γ ,255};

[0024] Among them, x' represents the pixel value after pixel compensation, x represents the standard pixel value, β represents the backlight dimming factor, β∈[0,1], γ represents the gamma value of the display screen, which is 2.2. The algorithm is for a standard 8-bit image with a grayscale level of 255;

[0025] Preferably, step S3 comprises the following steps:

[0026] S301. On the basis of the original red, green and blue pixels, the transparent light cone at the back is deflected and placed, and the light passes between the pixels while realizing the visual light deflection, thereby achieving an ultra-high light transmittance. This transparent light cone is made of highly transparent material, does not emit light, and does not participate in image display;

[0027] S302, the LCD panel is changed between a scattering state and a transmission state by controlling the electro-optical effect in the imaging coating. This change realizes the dual requirements of glass transparency and privacy protection, and can provide two-way use for the vehicle, ensuring absolute privacy when the user views the content;

[0028] S303, using imaging coating materials attached to the LCD panel body, the color depth of the glass is controlled by changing the current and the intensity of sunlight entering the room is adjusted, which can block about 99% of light and ultraviolet rays, providing a comfortable environment for users.

[0029] Preferably, step S4 comprises the following steps:

[0030] S401. For a display having N views, the resolution of a single view is 1 / N of the original display resolution, so a tilted lens structure and a color filter that rearranges pixels are used to distribute the loss of resolution to the horizontal and vertical directions;

[0031] S402, using a lens sheet in front of the two-dimensional liquid crystal screen to realize five multi-channel views, the lens sheet is aligned with the vertical pixel columns on the two-dimensional liquid crystal screen, and one pixel column is allocated to one view every five columns;

[0032] S403: When the viewer's eyes are positioned in the correct viewing area, the viewer can see the stereoscopic image from the spatial multiplex screen and can experience motion parallax when his head moves.

[0033] Preferably, in step S5, applying voltage to both ends of the liquid crystal molecules will cause the liquid crystal molecules to generate induced charges, thereby causing them to deflect. When the external light first passes through the polarizer, the light with the same polarization direction as the polarizer can penetrate through, while the light with a different polarization direction from the polarizer cannot penetrate through. The light reaches the liquid crystal light valve after being polarized by the polarizer. At this time, if an electric field is applied to the liquid crystal light valve, the direction of the light after polarization will be redirected, and the redirected light can directly penetrate after being analyzed by the analyzer.

[0034] Polarizer refers to a device used to obtain polarized light from natural light, which is emitted by ordinary light sources. Analyzer refers to a device used to identify the polarization state of light, as human eyes cannot distinguish between natural light and polarized light.

[0035] Iodine polarizers and dye polarizers have the following characteristics:

[0036] Iodine polarizer: It is easy to obtain optical properties of high transmittance and high polarization degree, but its ability to withstand high temperature and humidity is poor;

[0037] Dye-based polarizer: It is not easy to obtain optical properties of high transmittance and high polarization degree, but it has better ability to withstand high temperature and high humidity.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention can effectively solve the problems of small display area and poor visual effect of existing vehicle-mounted panels through transparent screen technology. The transparent screen can project information directly into the field of vision of the driver or passenger, will not interfere with the driver's or passenger's line of sight, and can improve the driving comfort and safety of the driver or passenger. By scattering light and using fast-response liquid crystal materials, high-speed switching between transparency and scattering can be achieved freely, and optical efficiency and color coverage can be improved through pixel optimization, and color difference with viewing angle can be reduced. The transparency of the transparent screen and the light transmittance of the screen are improved by increasing the transparent light cone and the light depression, and the use of multi-view Figure 3 3D display technology improves imaging quality, and the use of a polarizer that combines iodine-based polarizers with dye-based polarizers enables the display to achieve high transmittance and high polarization while being resistant to high temperature and high humidity, thereby improving the durability of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A flow chart of the overall method provided by an embodiment of the present invention;

[0041] Figure 2 A flow chart of a method for increasing a transparent light cone and a light depression provided by an embodiment of the present invention;

[0042] Figure 3 The multi-viewing method provided by the embodiment of the present invention Figure 3 Flowchart of the method for dimensional display. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figure 1-3 The present invention provides a technical solution: a hidden flexible display screen display method of a smart cockpit, comprising the following steps:

[0045] S1. Light scattering: LED light enters from the side of the liquid crystal unit, and the light propagates while being totally internally reflected by the front and rear walls of the liquid crystal unit, achieving high-speed switching between transparent and scattering states;

[0046] S2, pixel optimization: Taking external quantum efficiency EQE, maximum color shift MCS and color gamut coverage CGC as optimization targets, optimize the film thickness of LCD panel, improve optical efficiency and color coverage, and reduce color difference with viewing angle;

[0047] S3. Add transparent light cones and light traps: Add a transparent light cone behind the tiny gaps between pixels and add light traps behind the pixels of the LCD panel to increase the bright field of the display module and improve the display transmittance;

[0048] S4, Multi-view Figure 3 Dimensional display: Splits the display resolution between multiple views to form a spatially multi-channel screen, improving image quality through resolution compensation and tilt lens technology;

[0049] S5. Polarizer combination: A polarizer that combines an iodine-based polarizer with a dye-based polarizer is used to polarize and analyze the light passing through the liquid crystal light valve, thereby improving the penetration efficiency. While obtaining the optical properties of high transmittance and high polarization degree, it has the ability to withstand high temperature and high humidity.

[0050] In step S1, when the LCD panel is viewed from the screen-facing direction, it is visually transparent. When an electric field is applied to the liquid crystal unit, the orientation of the liquid crystal molecules changes, so that the LED light reaching the liquid crystal unit is scattered, and an image is displayed on the LCD panel. At this time, when the LCD panel is viewed from above, the scattered LED light makes the pixels appear visually.

[0051] Using fast-response liquid crystal materials to achieve high-speed switching between transparent and scattering states, the LCD panel can achieve color display using the CFS method, which means that red, green and blue light-emitting diodes are alternately lit, causing the pixels to turn on or off accordingly;

[0052] Fast response liquid crystal material is a liquid crystal material with high birefringence and low viscosity. It is mainly used in liquid crystal optical devices. The response speed of this material is very fast and can meet the demand for fast response in practical applications.

[0053] In step S2, pixel optimization includes an external quantum efficiency optimization algorithm. The external quantum efficiency EQE refers to the ratio of injected charge carriers to output photons at all viewing angles. It is a measure of the overall luminous efficiency of the LCD panel. The external quantum efficiency optimization algorithm effectively improves the light output efficiency of the luminous area. The specific external quantum efficiency algorithm is:

[0054]

[0055] Where EQE represents the external quantum efficiency, including the electrical efficiency, η(·) represents the extraction efficiency, represents the emission spectrum of the emission layer, λ represents the size parameter of the semiconductor component;

[0056] In step S2, pixel optimization also includes a color gamut coverage optimization algorithm. The color gamut coverage CGC includes the ability to measure color purity and display color, which is used to achieve a better color gamut coverage. The color gamut coverage algorithm is specifically as follows:

[0057]

[0058] Among them, CGC represents the color gamut coverage, A display Indicates the display color gamut of the LCD panel, A stardard Indicates the standard color gamut;

[0059] The maximum color shift MCS includes the angle data when viewing the LCD panel and the maximum distance of RGB in the two-dimensional plane dimension;

[0060] In step S2, a backlight brightness determination algorithm is used to adjust the brightness of the backlight source, thereby reducing the power consumption of the backlight source, and at the same time, a pixel compensation transformation algorithm is used to control the light transmittance of the LCD. The backlight brightness determination algorithm includes a maximum value method, an average value method, a root mean square method, a standard deviation method, and a mapping function inversion method.

[0061] The pixel compensation transformation algorithm is:

[0062] x'=min{x / β 1 / γ ,255};

[0063] Where x' represents the pixel value after pixel compensation, x represents the standard pixel value, β represents the backlight dimming factor, β∈[0,1], and γ represents the gamma value of the display screen, which is 2.2;

[0064] Step S3 includes the following steps:

[0065] S301. On the basis of the original red, green and blue pixels, the transparent light cone at the back is deflected and placed, and the light passes between the pixels while realizing the visual light deflection, thereby achieving an ultra-high light transmittance. This transparent light cone is made of highly transparent material, does not emit light, and does not participate in image display, thereby improving the display transmittance;

[0066] S302, the LCD panel is changed between a scattering state and a transmission state by controlling the electro-optical effect in the imaging coating. This change realizes the dual requirements of glass transparency and privacy protection, and can provide two-way use for the vehicle, ensuring absolute privacy when the user views the content;

[0067] S303, using imaging coating materials attached to the LCD panel body, controlling the depth of the glass color and adjusting the intensity of sunlight entering the room through current changes;

[0068] Step S4 includes the following steps:

[0069] S401. For a display having N views, the resolution of a single view is 1 / N of the original display resolution, so a tilted lens structure and a color filter that rearranges pixels are used to distribute the loss of resolution to the horizontal and vertical directions;

[0070] S402, using a lens sheet in front of the two-dimensional liquid crystal screen to realize five multi-channel views, the lens sheet is aligned with the vertical pixel columns on the two-dimensional liquid crystal screen, and one pixel column is allocated to one view every five columns;

[0071] S403, when the viewer's eyes are positioned in the correct viewing area, the viewer can see the stereoscopic image from the spatial multiplex screen, and when his head moves, he can experience motion parallax;

[0072] In step S5, voltage is applied to both ends of the liquid crystal molecules, which will cause the liquid crystal molecules to generate induced charges, thereby causing them to deflect. When the external light first passes through the polarizer, the light with the same polarization direction as the polarizer can pass through, while the light with a different polarization direction from the polarizer cannot pass through. The light is polarized by the polarizer and reaches the liquid crystal light valve. At this time, if an electric field is applied to the liquid crystal light valve, the direction of the polarized light will be redirected. The redirected light can directly pass through after being analyzed by the analyzer.

[0073] Polarizer refers to a device used to obtain polarized light from natural light, which is emitted by ordinary light sources. Analyzer refers to a device used to identify the polarization state of light, as human eyes cannot distinguish between natural light and polarized light.

[0074] Iodine polarizers and dye polarizers have the following characteristics:

[0075] Iodine polarizer: It is easy to obtain optical properties of high transmittance and high polarization degree, but its ability to withstand high temperature and humidity is poor;

[0076] Dye-based polarizer: It is not easy to obtain optical properties of high transmittance and high polarization degree, but it has better ability to withstand high temperature and high humidity.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hidden flexible display screen display method for a smart cockpit, characterized in that The following steps are involved: S1. Light scattering: LED light enters from the side of the liquid crystal unit, and the light propagates while being totally internally reflected by the front and rear walls of the liquid crystal unit, achieving high-speed switching between transparent and scattering states; S2, pixel optimization: Taking external quantum efficiency EQE, maximum color shift MCS and color gamut coverage CGC as optimization targets, optimize the film thickness of LCD panel, improve optical efficiency and color coverage, and reduce color difference with viewing angle; S3. Add transparent light cones and light traps: Add a transparent light cone behind the tiny gaps between pixels and add light traps behind the pixels of the LCD panel to increase the bright field of the display module and improve the display transmittance; S4, Multi-view 3D display: Split the resolution of the display screen between multiple views to form a spatial multi-channel screen, and improve image quality through resolution compensation and tilt lens technology; S5. Polarizer combination: A polarizer that combines an iodine-based polarizer with a dye-based polarizer is used to polarize and analyze the light passing through the liquid crystal light valve, thereby improving the penetration efficiency. While obtaining the optical properties of high transmittance and high polarization degree, it has the ability to withstand high temperature and high humidity.

2. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: In step S1, when the LCD panel is viewed from the direction facing the screen, it is visually transparent. When an electric field is applied to the liquid crystal unit, the orientation of the liquid crystal molecules changes, so that the LED light reaching the liquid crystal unit is scattered, and an image is displayed on the LCD panel. At this time, when the LCD panel is viewed from above, the scattered LED light makes the pixels appear visually. Using fast-response liquid crystal materials to achieve high-speed switching between transparent and scattering states, the LCD panel can achieve color display using the CFS method, which means that red, green and blue light-emitting diodes are alternately lit, causing the pixels to turn on or off accordingly.

3. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: In step S2, the pixel optimization includes an external quantum efficiency optimization algorithm. The external quantum efficiency EQE refers to the ratio of injected charge carriers to output photons at all viewing angles, which is a measure of the overall luminous efficiency of the LCD panel. The external quantum efficiency optimization algorithm effectively improves the light output efficiency of the luminous area. The external quantum efficiency algorithm is specifically: Where EQE represents the external quantum efficiency, including the electrical efficiency, η(·) represents the extraction efficiency, represents the emission spectrum of the emission layer, and λ represents the size parameter of the semiconductor component.

4. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: In step S2, the pixel optimization further includes a color gamut coverage optimization algorithm. The color gamut coverage CGC includes the ability to measure color purity and display color, and is used to achieve a better color gamut coverage. The color gamut coverage algorithm is specifically: Among them, CGC represents the color gamut coverage, A display Indicates the display color gamut of the LCD panel, A stardard Indicates the standard color gamut; The maximum color shift MCS contains the angle data when measuring the LCD panel and the maximum distance of RGB in the two-dimensional plane dimension.

5. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: In step S2, a backlight brightness determination algorithm is used to adjust the brightness of the backlight source, thereby reducing the power consumption of the backlight source, and at the same time, a pixel compensation transformation algorithm is used to control the transmittance of the LCD. The backlight brightness determination algorithm includes a maximum value method, an average value method, a root mean square method, a standard deviation method, and a mapping function inversion method.

6. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: The step S3 comprises the following steps: S301. On the basis of the original red, green and blue pixels, the transparent light cone at the back is deflected and placed, and the light passes through the pixels while the visual light is deflected, achieving an ultra-high light transmittance. This transparent light cone is made of highly transparent material, does not emit light, and does not participate in image display; S302, controlling the LCD panel to change between a scattering state and a transmission state by means of an electro-optical effect in the imaging coating; S303, using imaging coating materials attached to the LCD panel body, the color depth of the glass is controlled and the intensity of sunlight entering the room is adjusted by changing the current.

7. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: The step S4 comprises the following steps: S401. For a display having N views, the resolution of a single view is 1 / N of the original display resolution, so a tilted lens structure and a color filter that rearranges pixels are used to distribute the loss of resolution to the horizontal and vertical directions; S402, using a lens sheet in front of the two-dimensional liquid crystal screen to realize five multi-channel views, the lens sheet is aligned with the vertical pixel columns on the two-dimensional liquid crystal screen, and one pixel column is allocated to one view every five columns; S403: When the viewer's eyes are positioned in the correct viewing area, the viewer can see the stereoscopic image from the spatial multiplex screen and can experience motion parallax when his head moves.

8. The method for displaying a hidden flexible display screen of a smart cockpit according to claim 1, characterized in that: In step S5, voltage is applied to both ends of the liquid crystal molecules, which will cause the liquid crystal molecules to generate induced charges, thereby causing them to deflect. When the external light first passes through the polarizer, the light with the same polarization direction as the polarizer can penetrate through, but the light with a different polarization direction from the polarizer cannot penetrate through. The light is polarized by the polarizer and reaches the liquid crystal light valve. At this time, if an electric field is applied to the liquid crystal light valve, the direction of the polarized light will be redirected, and the redirected light can directly penetrate after being analyzed by the analyzer.

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