Vehicle-mounted display and setting method thereof, and vehicle-mounted display system

Abstract

The present invention provides a vehicle-mounted display and a setting method thereof, and a vehicle-mounted display system, which relate to the field of vehicle-mounted display technology, including: obtaining a first relationship between a color deviation parameter of a vehicle-mounted display and an optical path difference of a phase delay film; according to the first relationship, obtaining multiple optical path differences of the phase delay film when the color deviation parameter meets a first condition, forming a first optical path difference numerical library; in the first optical path difference numerical library, obtaining at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value, forming a second optical path difference numerical library; according to the second optical path difference numerical library, obtaining the thickness of the phase delay film. The embodiment of the present invention eliminates the color deviation of the vehicle-mounted display on the basis of changing the linearly polarized light emitted by the display panel into elliptically polarized light or circularly polarized light through the phase delay film, and improves the transmittance of the phase delay film, thereby realizing a design of high transmittance, depolarization, and decolorization.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-mounted display technology, and in particular to a vehicle-mounted display and a setting method thereof, and a vehicle-mounted display system. Background Art

[0002] With the rapid development of intelligent technology, liquid crystal display panels have become standard for vehicle-mounted central control and instrument screens. Liquid crystal display panels use the polarization characteristics of light for display. When linearly polarized light passes through a polarizer, its transmittance will decay, and its transmittance relationship is approximately: T = T0 cosθ. Among them, θ is the angle between the polarization direction of the linear polarization light and the transmission axis direction of the polarizer, and T0 is the transmittance when θ is 0°. The liquid crystal display panel uses the lower polarizer as a polarizer to obtain linearly polarized light, and uses the upper polarizer as an analyzer. The polarization direction of light in each pixel area is modulated by liquid crystal to change the light transmittance of each pixel point, thereby displaying. Under the above principle, the light emitted by the liquid crystal display panel is still linearly polarized light.

[0003] Since sunglasses use the principle of polarizing films - the direction of their transmission axes is based on the polarization characteristics of the light reflected from the asphalt road in the distance, the design of the car LCD screen must ensure that the direction of the upper polarizing film and the transmission axis of the sunglasses are consistent. Otherwise, the light emitted by the car LCD screen will be absorbed by the sunglasses. When the two are perpendicular, the transmittance is almost close to 0, which seriously affects driving safety.

[0004] Now some car models do not fully consider the polarization direction of the car LCD screen when choosing it. Some models use the horizontal screen in vertical mode or the vertical screen in horizontal mode. In addition, some car models use a rotating screen design for the car LCD screen. During the rotation process, the polarization direction of the light emitted by the car LCD screen also rotates, which will inevitably make it inconsistent with the direction of the sunglasses, resulting in the inability to see the display screen and affecting the driving experience and safety. Summary of the invention

[0005] The embodiments of the present invention provide a vehicle-mounted display and a method for setting it up, and a vehicle-mounted display system. On the basis of changing the linearly polarized light emitted by the display panel into elliptically polarized light or circularly polarized light through a phase delay film, the color deviation of the vehicle-mounted display is eliminated, and the transmittance of the phase delay film is improved, thereby achieving a design with high transmittance, depolarization, and decolorization.

[0006] In a first aspect, an embodiment of the present invention provides a method for setting a vehicle-mounted display, wherein the vehicle-mounted display comprises a display panel and a phase delay film, wherein the phase delay film is located on a light-emitting display side of the display panel;

[0007] The method comprises:

[0008] Acquire a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of the phase delay film;

[0009] According to the first relationship, a plurality of optical path differences of the phase delay film when the color shift parameter satisfies a first condition are acquired to form a first optical path difference value library;

[0010] In the first optical path difference value library, at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value is obtained to form a second optical path difference value library;

[0011] The thickness of the phase delay film is obtained according to the second optical path difference numerical library.

[0012] Optionally, before obtaining the first relationship between the color shift parameter of the vehicle-mounted display and the optical path difference of the phase delay film, the method further includes:

[0013] Acquiring a light emitting spectrum of the display panel;

[0014] Obtaining a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of the phase delay film includes:

[0015] According to the light emission spectrum of the display panel and the transmittance relation of the phase delay film, a first relation between the color shift parameter of the vehicle display and the optical path difference of the phase delay film is obtained.

[0016] Optionally, the transmittance relation of the phase delay film satisfies:

[0017]

[0018] Wherein, T is the transmittance of the phase delay film, δ is the optical path difference between the o-axis and the e-axis, and λ is the wavelength under vacuum.

[0019] Optionally, the color shift parameter includes a first color coordinate deviation and a second color coordinate deviation;

[0020] The first condition includes:

[0021] The first color coordinate deviation is 0, and / or the second color coordinate deviation is 0.

[0022] Optionally, the preset value is 0.5.

[0023] In a second aspect, an embodiment of the present invention provides a vehicle-mounted display formed by the method described in the first aspect, comprising:

[0024] A display panel is configured to display an image and emit linearly polarized light;

[0025] The phase delay film is located on the light-emitting display side of the display panel and is configured to change the linearly polarized light into elliptically polarized light or circularly polarized light.

[0026] Optionally, the display panel includes a cover plate, an upper polarizer, a liquid crystal box, a lower polarizer and a backlight source which are sequentially arranged away from the phase delay film.

[0027] Optionally, the angle between the o-axis of the phase delay film and the transmission axis of the upper polarizer is 45 degrees.

[0028] Optionally, the phase delay film includes a polyethylene terephthalate film material.

[0029] In a third aspect, an embodiment of the present invention provides a vehicle-mounted display system, comprising the vehicle-mounted display described in the second aspect, and sunglasses, wherein the sunglasses are configured to have a transmission axis.

[0030] The embodiment of the present invention provides a method for setting a vehicle-mounted display, obtaining a first relationship between a color deviation parameter of the vehicle-mounted display and an optical path difference of a phase delay film, obtaining multiple optical path differences of the phase delay film when the color deviation parameter satisfies a first condition according to the first relationship, forming a first optical path difference numerical library, obtaining at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value in the first optical path difference numerical library, forming a second optical path difference numerical library, and obtaining the thickness of the phase delay film according to the second optical path difference numerical library. On the basis of changing the linearly polarized light emitted by the display panel into elliptically polarized light or circularly polarized light through the phase delay film, the color deviation of the vehicle-mounted display is eliminated, and the transmittance of the phase delay film is improved, thereby realizing a design of high transmittance, depolarization, and decolorization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a vehicle-mounted display provided by an embodiment of the present invention;

[0032] Figure 2 A flow chart of a method for setting a vehicle-mounted display provided by an embodiment of the present invention;

[0033] Figure 3 A flow chart of another method for setting a vehicle-mounted display provided by an embodiment of the present invention;

[0034] Figure 4 A curve diagram showing the relationship between a color shift parameter and an optical path difference of a phase retardation film provided by an embodiment of the present invention;

[0035] Figure 5 A curve diagram showing the relationship between transmittance and optical path difference of a phase delay film provided in an embodiment of the present invention;

[0036] Figure 6A schematic structural diagram of a vehicle-mounted display system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] Figure 1 A schematic diagram of the structure of a vehicle-mounted display provided by an embodiment of the present invention, referring to Figure 1 The vehicle display includes a display panel 200 and a phase delay film 100. The phase delay film 100 is located on the light-emitting display side of the display panel 200. The light emitted by the display panel 200 is projected onto the phase delay film 100, and after being modulated by the phase delay film 100, it is projected out as an image for vehicle display.

[0039] Figure 2 A flow chart of a method for setting a vehicle display provided by an embodiment of the present invention. The method can be executed by a device for setting a vehicle display. The device can be implemented by software and / or hardware. Figure 1 and Figure 2 , the setting method of the vehicle display includes:

[0040] S110, obtaining a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of a phase delay film.

[0041] Optionally, the color shift parameter includes a first color coordinate deviation Δx and a second color coordinate deviation Δy. The first color coordinate deviation Δx is the difference between the color coordinate x of the light after passing through the phase delay film 100 and the color coordinate x of the light before passing through the phase delay film 100. The second color coordinate deviation Δy is the difference between the color coordinate y of the light after passing through the phase delay film 100 and the color coordinate y of the light before passing through the phase delay film 100. The color coordinates are expressed as (x, y, Y), where x is the value of the horizontal axis in the color coordinates, y is the value of the vertical axis in the color coordinates, and Y is the value of the brightness.

[0042] The light before passing through the phase delay film 100 is the light emitted from the display panel.

[0043] S120 , according to the first relationship, obtaining a plurality of optical path differences of the phase retardation film when the color shift parameter satisfies a first condition, and forming a first optical path difference value library.

[0044] Optionally, the first condition includes: the first color coordinate deviation is 0, and / or the second color coordinate deviation is 0. In one embodiment, when the first color coordinate deviation is 0, and / or the second color coordinate deviation is 0, multiple optical path differences of the phase delay film can be selected, and the multiple optical path differences are formed into a first optical path difference value library.

[0045] Figure 4 A graph showing the relationship between a color shift parameter and an optical path difference of a phase delay film provided in an embodiment of the present invention, with reference to Figure 4 , the horizontal axis is the optical path difference δ, and the vertical axis is the value of the first color coordinate deviation Δx and the second color coordinate deviation Δy. Figure 4 It can be seen that a plurality of values ​​of the optical path difference δ can be found such that the first color coordinate deviation Δx is 0 and / or the second color coordinate deviation Δy is 0.

[0046] It is understandable that when the first color coordinate deviation Δx is 0 and the second color coordinate deviation Δy is 0, adding the phase delay film 100 will not cause a change in the color shift parameter of the vehicle display compared to before adding the phase delay film 100 .

[0047] For example, reference Figure 4 , when δ falls near certain specific values, such as 250, 510, 3480, 3700, 3950, 5790, 7360, 8960, etc., the color coordinates x and y can maintain a very small deviation. It can be understood that in some embodiments, the first color coordinate deviation Δx can be set to be less than the first preset color coordinate deviation, and the second color coordinate deviation Δy can be set to be less than the second preset color coordinate deviation.

[0048] S130, obtaining at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value in the first optical path difference value library, to form a second optical path difference value library.

[0049] In this step, on the basis of satisfying the achromatic deviation in the above steps, in the first optical path difference numerical library, the optical path difference of the phase delay film with a transmittance greater than a preset value is selected, and the optical path difference of the phase delay film with a transmittance greater than a preset value is formed into a second optical path difference numerical library.

[0050] Optionally, the preset value is 0.5. In the first optical path difference value library, at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than 0.5 is obtained to form a second optical path difference value library.

[0051] Figure 5 A curve diagram showing the relationship between the transmittance and the optical path difference of a phase delay film provided in an embodiment of the present invention, with reference to Figure 5 , the horizontal axis is the optical path difference δ, and the vertical axis is the transmittance T. Figure 5It can be seen that, based on the optical path difference δ that makes Δx equal to 0 and / or Δy equal to 0, at least one optical path difference δ can be found to satisfy the transmittance T greater than 0.5.

[0052] Exemplarily, when δ is 510, the transmittance of the phase delay film is 0.88. The transmittance of the phase delay film is greater than 0.5.

[0053] S140, acquiring the thickness of the phase delay film according to the second optical path difference value library.

[0054] In this step, the thickness of the phase delay film can be obtained according to the optical path difference of the phase delay film summarized in the second optical path difference numerical library.

[0055] The embodiment of the present invention provides a method for setting a vehicle-mounted display, obtaining a first relationship between a color deviation parameter of the vehicle-mounted display and an optical path difference of a phase delay film, obtaining multiple optical path differences of the phase delay film when the color deviation parameter satisfies a first condition according to the first relationship, forming a first optical path difference numerical library, obtaining at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value in the first optical path difference numerical library, forming a second optical path difference numerical library, and obtaining the thickness of the phase delay film according to the second optical path difference numerical library. On the basis of changing the linearly polarized light emitted by the display panel into elliptically polarized light or circularly polarized light through the phase delay film, the color deviation of the vehicle-mounted display is eliminated, and the transmittance of the phase delay film is improved, thereby realizing a design of high transmittance, depolarization, and decolorization.

[0056] Figure 3 Another method for setting a vehicle display provided by an embodiment of the present invention is shown in the flowchart. Figure 3 , the setting method of the vehicle display includes:

[0057] S210: Acquire the light emission spectrum of the display panel.

[0058] S220 , obtaining a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of the phase delay film according to a light emission spectrum of the display panel and a transmittance relationship of the phase delay film.

[0059] Optionally, the transmittance relation of the phase retardation film satisfies: Where T(λ) is the transmittance of the phase delay film, δ is the optical path difference between the o-axis and the e-axis, and λ is the wavelength in vacuum. T(λ) is T. Since the transmittance T of the phase delay film is related to the wavelength λ in vacuum, it is expressed as T(λ).

[0060] Exemplarily, the light emitting spectrum data of the display panel is multiplied by the transmittance T(λ) of the phase delay film to obtain the output spectrum of the vehicle display, that is, the spectrum of the output light after passing through the phase delay film, which is converted into color coordinates to obtain the transmittance and the offset of the color coordinates when the optical path difference δ takes different values.

[0061] S230 , according to the first relationship, obtaining a plurality of optical path differences of the phase retardation film when the color shift parameter satisfies a first condition, and forming a first optical path difference value library.

[0062] S240, obtaining at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value in the first optical path difference value library, to form a second optical path difference value library.

[0063] S250, acquiring the thickness of the phase delay film according to the second optical path difference value library.

[0064] The embodiment of the present invention provides a method for setting a vehicle-mounted display. On the basis of the above embodiment, the light spectrum of the display panel is obtained, and the first relationship between the color shift parameter of the vehicle-mounted display and the optical path difference of the phase delay film is obtained according to the light spectrum of the display panel and the transmittance relationship of the phase delay film. Thus, a specific phase delay film is customized for each display panel, which improves the transmittance, depolarization, and color deviation elimination capabilities of the phase delay film and the display panel after the vehicle-mounted display is formed.

[0065] The embodiment of the present invention also provides a vehicle-mounted display formed by the above method, referring to Figure 1 The vehicle-mounted display includes a display panel 200 and a phase delay film 100. The display panel 200 is configured to display images and emit linearly polarized light. The phase delay film 100 is located on the light-emitting display side of the display panel 200, and the phase delay film 100 is configured to change the linearly polarized light into elliptically polarized light or circularly polarized light. Thus, the phase delay film 100 changes the polarization state of the light emitted by the vehicle-mounted display, from linearly polarized light to elliptically polarized light or circularly polarized light. Regardless of the angle of the transmission axis of the sunglasses, the light emitted by the vehicle-mounted display can pass normally, so that the user can see the image displayed by the vehicle-mounted display, which improves the driving experience and safety. The vehicle-mounted display in the embodiment of the present invention is formed by the above method and has the beneficial effects of the above method, which will not be repeated here.

[0066] Optionally, refer to Figure 1The display panel 200 includes a cover plate 210, an upper polarizer 230, a liquid crystal box 240, a lower polarizer 250, and a backlight source 260, which are sequentially arranged away from the phase delay film 100. The cover plate 210 is located between the phase delay film 100 and the upper polarizer 230. In other words, the phase delay film 100 is arranged above the cover plate 210. The liquid crystal box 240 is located between the upper polarizer 230 and the lower polarizer 250. The lower polarizer 250 is located between the liquid crystal box 240 and the backlight source 260.

[0067] The backlight beam emitted by the backlight source 260 becomes linearly polarized light after passing through the lower polarizer 250. The linearly polarized light is modulated by the polarization direction of each pixel area in the liquid crystal box 240, and cooperates with the upper polarizer 230 as an analyzer to change the light transmittance of each pixel, thereby displaying. The light passing through the upper polarizer 230 is linearly polarized light, and the linearly polarized light is changed into elliptically polarized light or circularly polarized light after being projected onto the phase delay film 100.

[0068] For example, reference Figure 1 The display panel 200 includes an optical adhesive 220 . The optical adhesive 220 is located between the cover plate 210 and the upper polarizer 230 , and is used to bond the cover plate 210 and the upper polarizer 230 .

[0069] Optionally, refer to Figure 1 The angle between the o-axis of the phase delay film and the transmission axis of the upper polarizer is 45 degrees. Therefore, the angle between the e-axis of the phase delay film and the transmission axis of the upper polarizer is 45 degrees.

[0070] Optionally, refer to Figure 1 The phase delay film 100 includes a polyethylene terephthalate (PET) film material.

[0071] An embodiment of the invention provides a vehicle-mounted display system, Figure 6 A schematic diagram of a vehicle display system according to an embodiment of the present invention is provided. Figure 6 The vehicle-mounted display system includes the vehicle-mounted display in the above embodiment and sunglasses 300. The sunglasses 300 are configured to have a transmission axis. Therefore, the sunglasses 300 are equivalent to linear polarizers and can be used as an analyzer to analyze the light projected onto the sunglasses 300. Since the phase delay film 100 is provided in the vehicle-mounted display, the light passing through the phase delay film 100 is elliptically polarized light or circularly polarized light. The elliptically polarized light or circularly polarized light can pass through the sunglasses 300 and will not be completely absorbed, thereby improving the driving experience and safety.

[0072] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for setting a vehicle-mounted display, characterized in that: The vehicle-mounted display comprises a display panel and a phase delay film, wherein the phase delay film is located on the light-emitting display side of the display panel; The method comprises: Acquiring a light emitting spectrum of the display panel; Acquire a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of the phase delay film; Obtaining a first relationship between a color shift parameter of the vehicle-mounted display and an optical path difference of the phase delay film includes: According to the light emission spectrum of the display panel and the transmittance relation of the phase delay film, a first relationship between the color shift parameter of the vehicle display and the optical path difference of the phase delay film is obtained; According to the first relationship, a plurality of optical path differences of the phase delay film when the color shift parameter satisfies a first condition are acquired to form a first optical path difference value library; In the first optical path difference value library, at least one optical path difference of the phase delay film when the transmittance of the phase delay film is greater than a preset value is obtained to form a second optical path difference value library; The thickness of the phase delay film is obtained according to the second optical path difference numerical library.

2. The method according to claim 1, characterized in that: The transmittance relation of the phase delay film satisfies: Wherein, T(λ) is the transmittance of the phase delay film, δ is the optical path difference between the o-axis and the e-axis, and λ is the wavelength under vacuum.

3. The method according to claim 1, characterized in that The color shift parameters include a first color coordinate deviation and a second color coordinate deviation; The first condition includes: The first color coordinate deviation is 0, and / or the second color coordinate deviation is 0.

4. The method according to claim 1, characterized in that: The preset value is 0.

5.

5. A vehicle-mounted display formed by the method of claim 1, characterized in that: include: A display panel is configured to display an image and emit linearly polarized light; The phase delay film is located on the light-emitting display side of the display panel and is configured to change the linearly polarized light into elliptically polarized light or circularly polarized light.

6. The vehicle-mounted display according to claim 5, characterized in that: The display panel comprises a cover plate, an upper polarizer, a liquid crystal box, a lower polarizer and a backlight source which are sequentially arranged away from the phase delay film.

7. The vehicle-mounted display according to claim 6, characterized in that: The angle between the o-axis of the phase delay film and the transmission axis of the upper polarizer is 45 degrees.

8. The vehicle-mounted display according to claim 5, characterized in that: The phase delay film comprises a polyethylene terephthalate film material.

9. A vehicle-mounted display system, characterized in that: The invention comprises the vehicle-mounted display according to any one of claims 5 to 8, and sunglasses, wherein the sunglasses are configured to have a transmission axis.

Images