Head-up display device and carrier

Abstract

The invention provides a head-up display device and a carrier, and the head-up display device comprises an image source which is used for generating a left eye image light beam and a right eye image light beam; the lenticular grating is located on a propagation path of the left-eye image light beam and the right-eye image light beam and is used for carrying out light splitting projection on the left-eye image light beam and the right-eye image light beam; the image source comprises a plurality of pixels, the pixels comprise M color sub-pixels and N white sub-pixels, the color sub-pixels emit color light, the white sub-pixels emit white light, M is larger than or equal to 2, and 1 is smaller than or equal to N; in one pixel, the M color sub-pixels are arranged along a first direction; in the first direction, the color sub-pixels are arranged in a row, the white sub-pixels are arranged in a row, in the second direction, the color sub-pixels and the white sub-pixels are alternately arranged, and the first direction intersects with the second direction. When the head-up display device displays different contents, the difference between the brightness represented by different cylindrical lenses is reduced, so that the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of head-up display technology, and in particular to a head-up display device and a vehicle. Background Art

[0002] With the popularization of automobiles, they are becoming more and more intelligent. In order to improve driving safety and make drivers focus more on the road, more and more vehicles use head-up displays (HUDs) instead of instrument panels to display driving information.

[0003] With the development of HUD technology, higher requirements are being placed on the brightness of each HUD sub-pixel. The current method of increasing the brightness of each HUD sub-pixel by adding white (W) to the primary colors such as red (R), green (G), and blue (B) will cause uneven brightness changes as the observer moves. Summary of the Invention

[0004] Embodiments of the present invention provide a head-up display device and a vehicle, which ensure that when the head-up display device displays different contents, the difference in brightness between different cylindrical lenses is reduced, thereby improving the user experience.

[0005] In one aspect, an embodiment of the present invention provides a head-up display device, comprising:

[0006] an image source, the image source being configured to generate a left-eye image beam and a right-eye image beam;

[0007] a cylindrical grating, located on the propagation paths of the left-eye image beam and the right-eye image beam, and configured to split and project the left-eye image beam and the right-eye image beam;

[0008] The image source includes a plurality of pixels, each pixel including M color sub-pixels and N white sub-pixels, the color sub-pixels emit colored light, and the white sub-pixels emit white light, 2≤M, 1≤N; in one pixel, the M color sub-pixels are arranged along a first direction;

[0009] Along the first direction, the plurality of color sub-pixels are arranged in a row, and the plurality of white sub-pixels are arranged in a row. Along the second direction, the color sub-pixels and the white sub-pixels are alternately arranged. The first direction intersects the second direction.

[0010] Optionally, the sum of the light-emitting areas of the M color sub-pixels is S1, and the sum of the light-emitting areas of the N white sub-pixels is S2.

[0011] Optionally,

[0012] Optionally, the image source includes a first screen area and a second screen area, and the first screen area and the second screen area include a plurality of the pixels;

[0013] In the first screen area, In the second screen area, A1 is not equal to A2.

[0014] Optionally, the first screen area is projected to form a first display area, the second screen area is projected to form a second display area, and the first display area is located above the second display area;

[0015] A1 is smaller than A2.

[0016] Optionally, the image source includes a plurality of screen areas arranged along a third direction, and the plurality of screen areas include the first screen area and the second screen area;

[0017] Along the third direction, the pixels in the plurality of screen areas Gradually increase or decrease.

[0018] Optionally, the M color sub-pixels include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the red sub-pixel emits red light, the green sub-pixel emits green light, and the blue sub-pixel emits blue light;

[0019] The N white sub-pixels include a first white sub-pixel, a second white sub-pixel, and a third white sub-pixel, and the first white sub-pixel, the second white sub-pixel, and the third white sub-pixel are arranged along the first direction.

[0020] Optionally, along the first direction, the red sub-pixel, the green sub-pixel, the blue sub-pixel, the first white sub-pixel, the second white sub-pixel and the third white sub-pixel have the same width.

[0021] Optionally, the N white sub-pixels further include a fourth white sub-pixel;

[0022] Along the second direction, the red sub-pixel is located between the first white sub-pixel and the fourth white sub-pixel.

[0023] Optionally, the N white sub-pixels include bottom white sub-pixels and side white sub-pixels;

[0024] The color sub-pixels and the side white sub-pixels are arranged along the first direction, and the color sub-pixels and the bottom white sub-pixels are arranged along the second direction.

[0025] Optionally, the image source further includes a white control circuit, and the white control circuit includes a first white control circuit and a second white control circuit;

[0026] The first white control circuit is electrically connected to the bottom white sub-pixels in the plurality of pixels, and the second white control circuit is electrically connected to the side white sub-pixels in the plurality of pixels.

[0027] Optionally, the image source further includes a white control circuit and a color control circuit;

[0028] The white control circuit is electrically connected to the white sub-pixels in the plurality of pixels, and the color control circuit is electrically connected to the color sub-pixels in the plurality of pixels.

[0029] Optionally, the grayscale of the white sub-pixel is controlled in response to the brightness of external ambient light.

[0030] Optionally, the grayscale of the white sub-pixel is controlled in response to the grayscale of the color sub-pixels in the pixel.

[0031] On the other hand, an embodiment of the present invention provides a vehicle, comprising the head-up display device provided by any embodiment of the present invention, and a windshield.

[0032] In the head-up display device provided in an embodiment of the present invention, the image source includes multiple pixels. Each pixel includes M color sub-pixels and N white sub-pixels. The color sub-pixels and white sub-pixels are arranged alternately along a second direction. Compared to the related art method of arranging the color sub-pixels and white sub-pixels along the first direction, the arrangement direction of the color sub-pixels and white sub-pixels is changed, that is, the traditional vertical arrangement is changed to a horizontal arrangement. This pixel arrangement ensures that the number of white sub-pixels under different cylindrical lenses is the same. Therefore, when the head-up display device displays different content, the difference in brightness between different cylindrical lenses is reduced, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the structure of a head-up display device in the related art;

[0034] Figure 2 A schematic diagram of the three-dimensional structure of a head-up display device provided by an embodiment of the present invention;

[0035] Figure 3 A schematic structural diagram of a head-up display device provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of a partial structure of an image source provided by an embodiment of the present invention;

[0037] Figure 5 To correspond to Figure 4 A schematic diagram of a display area of an image source shown in ;

[0038] Figure 6 A schematic diagram of a portion of the structure of another image source provided by an embodiment of the present invention;

[0039] Figure 7 A schematic diagram of a partial structure of another image source provided by an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of an arrangement of sub-pixels in a pixel within a first image source provided by an embodiment of the present invention;

[0041] Figure 9 A schematic diagram of an arrangement of sub-pixels in a pixel within a second image source provided by an embodiment of the present invention;

[0042] Figure 10 A schematic diagram of an arrangement of sub-pixels within a pixel in a third image source provided by an embodiment of the present invention;

[0043] Figure 11 A schematic diagram of an arrangement of sub-pixels within a pixel in a fourth image source provided by an embodiment of the present invention;

[0044] Figure 12 A schematic diagram of an arrangement of sub-pixels in a pixel within a fifth image source provided by an embodiment of the present invention;

[0045] Figure 13 A schematic structural diagram of a vehicle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0047] Figure 1 This is a schematic diagram of the structure of a head-up display device in the related art, refer to Figure 1 , the white sub-pixel 302 is added to the pixel 300 to improve the brightness of the pixel 300. However, in the related art, the four sub-pixels of different luminous colors included in the pixel 300 are usually arranged along the first direction x, such as Figure 1As shown, red sub-pixel 301a, green sub-pixel 301b, blue sub-pixel 301c, and white sub-pixel 302 are all arranged along a first direction x. The lenticular lens 200 includes a periodically arranged plurality of cylindrical lenses 400. These cylindrical lenses 400 are positioned at an angle, and the number of white sub-pixels 302 covered by different cylindrical lenses 400 varies. Therefore, when displaying content, different cylindrical lenses 400 produce different brightness levels, resulting in a poor user experience. To overcome this problem, related art techniques require the introduction of an additional color gamut mapping algorithm to synchronously adjust the brightness of the sub-pixels to achieve uniform brightness.

[0048] In the related art, reference Figure 1 The effective luminous area ratio of the color sub-pixel 301 and the white sub-pixel 302 in each pixel 300 is the same. When adjusting the brightness and contrast in the head-up display scene, an additional color gamut mapping algorithm is required. Through precise algorithm control, each white sub-pixel 302 is mapped point by point with its corresponding color sub-pixel 301, and the brightness of the white sub-pixel 302 is matched and coordinated one-to-one with the adjacent color sub-pixel 301 to ensure the stability of the color gamut, thereby achieving the purpose of optimizing the display effect.

[0049] Figure 2 A schematic diagram of the three-dimensional structure of a head-up display device provided by an embodiment of the present invention is shown in FIG. Figure 3 A schematic diagram of the structure of a head-up display device provided by an embodiment of the present invention, referring to Figure 2 and Figure 3 , the head-up display device includes an image source 100 and a cylindrical grating 200. The image source 100 is used to generate a left-eye image beam and a right-eye image beam; the cylindrical grating 200 is located on the propagation path of the left-eye image beam and the right-eye image beam, and the cylindrical grating 200 is used to split the left-eye image beam and the right-eye image beam for projection. The cylindrical grating 200 is a spectroscopic element, which deflects the left-eye image beam and the right-eye image beam in different directions to project the left-eye image beam to the left eye and the right-eye image beam to the right eye. The image source 100 includes a plurality of pixels 300, and the pixel 300 includes M color sub-pixels 301 and N white sub-pixels 302. The color sub-pixels 301 emit colored light, and the white sub-pixels 302 emit white light, 2≤M, 1≤N. In Figure 3In the figure, M=3 and N=3 are used as an example, but the present invention is not limited thereto. In a pixel 300, M color sub-pixels 301 are arranged along a first direction x. Along the first direction x, a plurality of color sub-pixels 301 are arranged in rows, and a plurality of white sub-pixels 302 are arranged in rows. Along the second direction y, the color sub-pixels 301 and the white sub-pixels 302 are arranged alternately. In one embodiment, the color sub-pixels 301 and the white sub-pixels 302 are arranged alternately one by one, and along the second direction y, the color sub-pixels 301, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the .... In other embodiments, other arrangements may be used, for example, along the second direction y, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the white sub-pixel 302, the color sub-pixel 301, the white sub-pixel 302, the .... The first direction x intersects the second direction y.

[0050] In the head-up display device provided by an embodiment of the present invention, the image source 100 includes a plurality of pixels 300. The pixels 300 include M color sub-pixels 301 and N white sub-pixels 302. The color sub-pixels 301 and the white sub-pixels 302 are arranged alternately along a second direction y. Compared to the related art arrangement of the color sub-pixels 301 and the white sub-pixels 302 along a first direction x, the arrangement of the color sub-pixels 301 and the white sub-pixels 302 is altered, i.e., the traditional vertical arrangement is changed to a horizontal arrangement. This pixel arrangement ensures that the number of white sub-pixels 302 under different cylindrical lenses 400 is the same. Therefore, when the head-up display device displays different content, the difference in brightness between different cylindrical lenses 400 is minimized, thereby improving the user experience.

[0051] Optionally, refer to Figure 2 and Figure 3 , the sum of the luminous areas of the M color sub-pixels 301 is S1, and the sum of the luminous areas of the N white sub-pixels 302 is S2, where Will Defined as the effective luminous area ratio, the higher the effective luminous area ratio, the lower the proportion of the sum of the luminous areas S2 of the white sub-pixels 302 in the entire pixel 300, the smaller the effect of the white sub-pixels 302 on the brightness improvement of the pixel 300, and the smaller the impact of the white sub-pixels 302 on the RGB color gamut compression, and the better the color performance of the pixel 300. The lower the effective luminous area ratio, the higher the proportion of the sum of the luminous areas S2 of the white sub-pixels 302, and the greater the effect on the brightness improvement of the pixel 300. In the embodiment of the present invention, setting This ensures that the effective light emitting area ratio is not too small, thereby enhancing the effect of the white sub-pixel 302 on improving the brightness of the pixel 300 .

[0052] Optionally, refer to Figure 2 and Figure 3 , thus, On the basis of enhancing the brightness improvement effect of the white sub-pixel 302 on the pixel 300, in the embodiment of the present invention, setting The effective light emitting area ratio is not too large, thereby reducing the influence of the white sub-pixel 302 on the RGB color gamut compression and improving the color performance of the pixel 300.

[0053] For example, continue to refer to Figure 3 Pixel 300 includes three color sub-pixels 301 and three white sub-pixels 302. The color sub-pixels 301 and the white sub-pixels 302 have a one-to-one correspondence. The sum of the luminous areas of the three color sub-pixels 301 is S1, and the sum of the luminous areas of the three white sub-pixels 302 is S2.

[0054] The area where the image source 100 generates display content is defined as the screen area. The content in the screen area is projected onto the windshield through a series of reflection paths. After being reflected from the windshield and projected to the human eye, the area where the display content is perceived by the human eye is defined as the display area. The correspondence between the screen area and the display area is determined by factors such as the windshield shape and the parameters of the imaging elements within the head-up display (including the reflector, the surface shape of the lenticular lens 200, and the optical path design). Research has found that the preference for higher brightness or better color saturation in a given display area is relatively constant.

[0055] Optionally, Figure 4 A partial structural diagram of an image source provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the image source 100 includes a first screen area 201 and a second screen area 202, and the first screen area 201 and the second screen area 202 include a plurality of pixels 300. The first screen area 201 includes a plurality of pixels 300, and the second screen area 202 includes a plurality of pixels 300. Figure 4 In the example, the first screen area 201 includes two pixels 300 and the second screen area 202 includes two pixels 300, but the present invention is not limited thereto. In the second screen area 202, A1 is not equal to A2. In the embodiment of the present invention, the first screen area 201 and the second screen area 202 The values of are different, and the effective luminous area ratios in the first screen area 201 and the second screen area 202 are different. The first screen area 201 and the second screen area 202 have different pixel arrangements. Therefore, the effective luminous area ratio of the first screen area 201 can be configured according to the brightness and color requirements of the display area corresponding to the first screen area 201, and the effective luminous area ratio of the second screen area 202 can be configured according to the brightness and color requirements of the display area corresponding to the second screen area 202. This eliminates the need to map each white sub-pixel 302 to its corresponding color sub-pixel 301 point by point, and eliminates the need to introduce additional color gamut mapping algorithms, thereby simplifying the algorithm. By arranging pixels with different effective luminous area ratios in the screen area of the image source 100, display content with different color saturation and brightness can be obtained, thereby meeting the needs of different display areas.

[0056] Figure 5 To correspond to Figure 4 Schematic diagram of the display area of the image source shown in , refer to Figure 4 and Figure 5 , the first screen area 201 is projected to form a first display area 401, and the second screen area 202 is projected to form a second display area 402. The first display area 401 is located on the upper side of the second display area 402, wherein A1 is smaller than A2. The portion close to the upper end of the display area generally requires higher brightness, while the portion where the display content of the head-up display device fits in with the real scene generally requires better color saturation. The first display area 401 requires higher brightness, and the second display area 402 requires better color saturation, so A1 is correspondingly set to be smaller than A2. The effective luminous area ratio of the pixel 300 in the first screen area 201 is smaller than the effective luminous area ratio of the pixel 300 in the second screen area 202. The white sub-pixel 302 in the first screen area 201 has a larger area ratio, and the white sub-pixel 302 in the second screen area 202 has a smaller area ratio.

[0057] As an example, the first display area 401 at the top requires higher brightness. Specifically, the area of the white sub-pixels 302 in the first screen area 201 of the image source 100 needs to be larger, meaning A1 is smaller, thereby increasing the brightness of the first display area 401. The second display area 402, which is the portion of the head-up display where the displayed content and the real scene overlap, is relatively darker than the first display area 401. However, the human eye has a higher ability to discern highly saturated colors. Therefore, the color gamut of the second display area 402 can be improved by reducing the area of the white sub-pixels 302 in the second screen area 402, i.e., setting A1 smaller than A2.

[0058] Specifically, in the image source 100, the pixel 300 includes a color sub-pixel 301 and a white sub-pixel 302, and the light-emitting area of each color sub-pixel 301 is consistent, wherein the color sub-pixel 301 is used to display the color and brightness of the displayed content, and the white sub-pixel 302 is used to increase the brightness of the displayed content.

[0059] Optionally, Figure 6 A partial structural diagram of another image source provided by an embodiment of the present invention, such as Figure 6 As shown, the image source 100 includes a plurality of screen areas arranged along a third direction x1, the plurality of screen areas including a first screen area 201 and a second screen area 202; along the third direction x1, the pixels in the plurality of screen areas are Gradually increase or decrease.

[0060] For example, refer to Figure 6 , the image source 100 includes a first screen area 201, a second screen area 202 and a third screen area 203. Along the third direction x1, the second screen area 202 is located between the first screen area 201 and the third screen area 203. smaller than the pixels 300 in the second screen area 202 The pixels 300 in the second screen area 202 is smaller than the pixels 300 in the third screen area 203 Along the third direction x1, the number of pixels in multiple screen areas Gradually increase.

[0061] For example, refer to Figure 6 , the third direction x1 intersects with the first direction x, and the third direction x1 intersects with the second direction y. Figure 6 The dotted lines arranged obliquely divide the image source 100 into a plurality of screen areas. The plurality of screen areas are arranged obliquely.

[0062] Figure 7 A partial structural diagram of another image source provided by an embodiment of the present invention, referring to Figure 7 , the third direction x1 intersects the first direction x, and the third direction x1 is parallel to the second direction y. Along the second direction y, the pixel value gradually increases or decreases. Gradually decreases along the second direction y, for example, The brightness of each display area increases gradually from bottom to top.

[0063] In an optional embodiment of the present invention, continue to refer to Figure 3The M color sub-pixels 301 include a red sub-pixel 301a, a green sub-pixel 301b, and a blue sub-pixel 301c. The red sub-pixel 301a emits red light, the green sub-pixel 301b emits green light, and the blue sub-pixel 301c emits blue light. The N white sub-pixels 302 include a first white sub-pixel 302a, a second white sub-pixel 302b, and a third white sub-pixel 302c. The first white sub-pixel 302a, the second white sub-pixel 302b, and the third white sub-pixel 302c are arranged along a first direction x. In one embodiment, a pixel 300 includes three color sub-pixels 301 and three white sub-pixels 302. The three color sub-pixels 301 are arranged in a row along the first direction x, and the three white sub-pixels 302 are arranged in another row along the first direction x. The color sub-pixels 301 and the white sub-pixels 302 are arranged along a second direction y. In this embodiment of the present invention, by providing a white sub-pixel 302 on one side of each color sub-pixel 301 in the second direction y, the number of white sub-pixels 302 covered by each lenticular lens 400 is the same. This minimizes the difference in brightness between different lenticular lenses 400 when displaying different content, thereby improving the user experience. Furthermore, each color sub-pixel 301 corresponds to a corresponding white sub-pixel 301, enabling more precise local brightness control while reducing power consumption and improving energy efficiency.

[0064] For example, the number of white sub-pixels 302 in the pixel 300 can be equal to the number of color sub-pixels 301, that is, each color sub-pixel corresponds to a white sub-pixel 302 in the y direction, and the light-emitting area of each color sub-pixel 301 remains consistent. The red sub-pixel 301a and the first white sub-pixel 302a are arranged along the second direction y, the green sub-pixel 301b and the second white sub-pixel 302b are arranged along the second direction y, and the blue sub-pixel 301c and the third white sub-pixel 302c are arranged along the second direction y.

[0065] refer to Figure 3 Along the first direction x, the red sub-pixel 301a, the green sub-pixel 301b, the blue sub-pixel 301c, the first white sub-pixel 302a, the second white sub-pixel 302b, and the third white sub-pixel 302c have the same width. This reduces the difficulty of sub-pixel design and the difficulty of sub-pixel manufacturing. In one embodiment, a white sub-pixel 302 is disposed below each color sub-pixel 301, and the color sub-pixels 301 and the white sub-pixels 302 have the same width along the first direction x.

[0066] Optionally, Figure 8 A schematic diagram of the arrangement of sub-pixels in a pixel in a first image source according to an embodiment of the present invention is shown in FIG. Figure 8As shown, the N white sub-pixels 302 further include a fourth white sub-pixel 302d. Along the second direction y, the red sub-pixel 301a is located between the first white sub-pixel 302a and the fourth white sub-pixel 302d.

[0067] For example, along the second direction y, the green sub-pixel 301b is located between the second white sub-pixel 302b and the fourth white sub-pixel 302d, and the blue sub-pixel 301c is located between the third white sub-pixel 302c and the fourth white sub-pixel 302d. The fourth white sub-pixel 302d is located on the opposite side of the first white sub-pixel 302a, the second white sub-pixel 302b, and the third white sub-pixel 302c. Along the first direction x, the width of the fourth white sub-pixel 302d is greater than the widths of the first white sub-pixel 302a, the second white sub-pixel 302b, and the third white sub-pixel 302c. The width of the fourth white sub-pixel 302d is greater than the widths of the red sub-pixel 301a, the green sub-pixel 301b, and the blue sub-pixel 301c.

[0068] Figure 9 A schematic diagram of the arrangement of sub-pixels in a pixel in a second image source provided by an embodiment of the present invention is shown in FIG. Figure 9 As shown, the N white sub-pixels 302 also include a fifth white sub-pixel 302e and a sixth white sub-pixel 302f, wherein the red sub-pixel 301a is located between the first white sub-pixel 302a and the fourth white sub-pixel 302d, the green sub-pixel 301b is located between the second white sub-pixel 302b and the fifth white sub-pixel 302e, and the blue sub-pixel 301c is located between the third white sub-pixel 302c and the sixth white sub-pixel 302f.

[0069] because Figure 9 Each color sub-pixel 301 corresponds to two white sub-pixels 302, so when the brightness of the color sub-pixel 301 is adjusted, Figure 9 Relative to Figure 8 The illustrated embodiment is more flexible.

[0070] Figure 10 Schematic diagram of the arrangement of sub-pixels in a pixel of the third image source provided by an embodiment of the present invention. This embodiment only includes two independent white sub-pixels 302, but the proportion of the luminous area is the same as Figure 8 and Figure 9 The embodiments shown are the same, so Figure 10 The illustrated embodiment has the advantage of simplifying the pixel control circuitry.

[0071] For example, refer to Figure 10, the white sub-pixel 302 in the pixel 300 includes a first white sub-pixel 302a and a second white sub-pixel 302b. Along the second direction y, the red sub-pixel 301a, the green sub-pixel 301b, and the blue sub-pixel 301c are all located between the first white sub-pixel 302a and the second white sub-pixel 302b. Along the first direction x, the width of the first white sub-pixel 302a is greater than the widths of the red sub-pixel 301a, the green sub-pixel 301b, and the blue sub-pixel 301c. Along the first direction x, the width of the second white sub-pixel 302b is greater than the widths of the red sub-pixel 301a, the green sub-pixel 301b, and the blue sub-pixel 301c.

[0072] Figure 11 A schematic diagram of the arrangement of sub-pixels in a pixel of a fourth image source provided by an embodiment of the present invention is shown in FIG. Figure 11 As shown, each color sub-pixel 301 corresponds to two white sub-pixels 302, which can achieve more precise brightness control.

[0073] For example, refer to Figure 11 , a first white sub-pixel 302a and a second white sub-pixel 302b are disposed below the red sub-pixel 301a. A third white sub-pixel 302c and a fourth white sub-pixel 302d are disposed below the green sub-pixel 301b. A fifth white sub-pixel 302e and a sixth white sub-pixel 302f are disposed below the blue sub-pixel 301c. Along the first direction x, the width of the white sub-pixel 302 is half the width of the color sub-pixel 301.

[0074] Optionally, Figure 12 A schematic diagram of the arrangement of sub-pixels in a pixel of a fifth image source provided by an embodiment of the present invention is shown in FIG. Figure 12 As shown, N white sub-pixels 302 include a bottom white sub-pixel 302g and a side white sub-pixel 302h. Color sub-pixels 301 and side white sub-pixels 302h are arranged along a first direction x, and color sub-pixels 301 and bottom white sub-pixel 302g are arranged along a second direction y. At least one of bottom white sub-pixel 302g and side white sub-pixel 302h can be operated to provide brightness for pixel 300.

[0075] For example, refer to Figure 12 , the bottom white sub-pixel 302g includes one white sub-pixel 302 as an example, but the present invention is not limited thereto. In other embodiments, the bottom white sub-pixel 302g may also include multiple white sub-pixels 302, for example, the bottom white sub-pixel 302g includes Figure 3 The three white sub-pixels 302 shown, or as Figure 11 Six white sub-pixels 302 are shown.

[0076] Optionally, the image source further includes a white control circuit, which includes a first white control circuit and a second white control circuit. The first white control circuit is electrically connected to the bottom white sub-pixel 302g in the plurality of pixels 300, and the second white control circuit is electrically connected to the side white sub-pixel 302h in the plurality of pixels 300.

[0077] For example, during assisted driving, the head-up display device requires a high response speed. To meet this high response speed requirement, the first white control circuit can control the brightness of the bottom white sub-pixel 302g, while the second white control circuit can control the side white sub-pixel 302h to be off. The bottom white sub-pixel 302g is arranged vertically with the color sub-pixels 301 (i.e., along the second direction y), minimizing the difference in brightness displayed by different cylindrical lenses 400.

[0078] For example, for functions that don't require high response speeds, such as audio and video entertainment, two white control circuits can be used for separate control: the first white control circuit controls the brightness of the bottom white sub-pixel 302g, while the second white control circuit controls the brightness of the side white sub-pixel 302h. Without high response speed requirements, there's ample time to employ a color gamut mapping algorithm to map each white sub-pixel 302 to its corresponding color sub-pixel 301, point by point, improving the user's audio and video experience.

[0079] Optionally, the image source 100 further includes a white control circuit and a color control circuit; the white control circuit is electrically connected to the white sub-pixels 302 in the plurality of pixels 300 , and the color control circuit is electrically connected to the color sub-pixels 301 in the plurality of pixels 300 .

[0080] In this embodiment, independent control of the color sub-pixels 301 and white sub-pixels 302 is achieved by connecting the white sub-pixels 302 in multiple pixels 300 using a white control circuit and connecting the color sub-pixels 301 in multiple pixels 300 using a color control circuit. Different pixels 300 have different effective luminous area ratios, eliminating the need for point-by-point mapping of each white sub-pixel 302 to its corresponding color sub-pixel 301 during drive control. The correspondence between one white sub-pixel 302 and one color sub-pixel 301 reduces the resulting contrast difference. Therefore, the white sub-pixels 302 can be centrally controlled using an independent data path, simplifying the sub-pixel control algorithm and improving system response speed and reliability. This structure eliminates the need for real-time chromaticity compensation calculations performed by the MCU / GPU for control of the white sub-pixels 302, making it suitable for applications such as head-up displays that require extremely fast response times.

[0081] Illustratively, the white control circuit includes a first white control circuit, and the first white control circuit controls the brightness of the bottom white sub-pixel 302g.

[0082] In an optional embodiment, the white control circuit controls the grayscale of the white sub-pixel 302 in response to the brightness of the external ambient light. That is, when the brightness of the external ambient light is strong, the white control circuit increases the grayscale of the white sub-pixel 302, thereby increasing the brightness of the display content in the HUD, so that the user can observe the display content more clearly and avoid the phenomenon that the display content is submerged by the ambient light; when the brightness of the external ambient light is weak, the white control circuit lowers the grayscale of the white sub-pixel 302, thereby reducing the brightness of the display content in the head-up display device. On the one hand, it reduces power consumption and improves energy efficiency. On the other hand, it avoids the stimulation of high brightness to the human eye and ensures user experience.

[0083] In another optional embodiment, the white control circuit controls the grayscale of the white sub-pixel 302 in response to the grayscale of the color sub-pixel 301 in the pixel 300. That is, when the display content of the head-up display device requires high color saturation, the white control circuit lowers the grayscale of the white sub-pixel 302 to reduce the interference of white light, and the color control circuit increases the grayscale of the color sub-pixel 301 to increase the color vividness, thereby ensuring the stability of the color gamut.

[0084] Based on the same inventive concept, embodiments of the present invention provide a vehicle comprising a head-up display device and a windshield according to any of the embodiments of the present invention. Thus, the vehicle exhibits the beneficial effects of the head-up display devices of the aforementioned embodiments, namely, minimizing the difference in brightness between different cylindrical lenses when displaying different content, thereby improving the user experience.

[0085] Figure 13 A schematic diagram of a vehicle structure provided by an embodiment of the present invention, referring to Figure 13 The image source 100 outputs an image beam, which propagates to the curved reflector 500 after passing through the cylindrical grating 200. The curved reflector 500 reflects the image beam onto the windshield 600 of the vehicle. The windshield 600 then reflects the image light into the eye box 800. When the human eye observes the image beam, it will see a virtual image 700.

[0086] In other embodiments, at least one reflective element may be further provided between the optical path of the cylindrical grating 200 and the curved reflector 500 . The reflective element may be, for example, a plane reflector or a curved reflector.

[0087] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A head-up display device, characterized in that: include: an image source, the image source being configured to generate a left-eye image beam and a right-eye image beam; a cylindrical grating, located on the propagation paths of the left-eye image beam and the right-eye image beam, and configured to split and project the left-eye image beam and the right-eye image beam; The image source includes a plurality of pixels, each pixel including M color sub-pixels and N white sub-pixels, the color sub-pixels emit colored light, and the white sub-pixels emit white light, 2≤M, 1≤N; in one pixel, the M color sub-pixels are arranged along a first direction; Along the first direction, the plurality of color sub-pixels are arranged in a row, and the plurality of white sub-pixels are arranged in a row. Along the second direction, the color sub-pixels and the white sub-pixels are alternately arranged. The first direction intersects the second direction.

2. The head-up display device according to claim 1, wherein: The sum of the luminous areas of the M color sub-pixels is S1, and the sum of the luminous areas of the N white sub-pixels is S2.

3. The head-up display device according to claim 2, characterized in that:

4. The head-up display device according to claim 1, wherein: The image source includes a first screen area and a second screen area, and the first screen area and the second screen area include a plurality of the pixels; In the first screen area, In the second screen area, A1 is not equal to A2.

5. The head-up display device according to claim 4, characterized in that: The first screen area is projected to form a first display area, the second screen area is projected to form a second display area, and the first display area is located above the second display area; A1 is smaller than A2.

6. The head-up display device according to claim 4, characterized in that: The image source includes a plurality of screen areas arranged along a third direction, the plurality of screen areas including the first screen area and the second screen area; Along the third direction, the pixels in the plurality of screen areas Gradually increase or decrease.

7. The head-up display device according to claim 1, wherein: The M color sub-pixels include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the red sub-pixel emits red light, the green sub-pixel emits green light, and the blue sub-pixel emits blue light; The N white sub-pixels include a first white sub-pixel, a second white sub-pixel, and a third white sub-pixel, and the first white sub-pixel, the second white sub-pixel, and the third white sub-pixel are arranged along the first direction.

8. The head-up display device according to claim 7, characterized in that: Along the first direction, the red sub-pixel, the green sub-pixel, the blue sub-pixel, the first white sub-pixel, the second white sub-pixel, and the third white sub-pixel have the same width.

9. The head-up display device according to claim 7, characterized in that: The N white sub-pixels further include a fourth white sub-pixel; Along the second direction, the red sub-pixel is located between the first white sub-pixel and the fourth white sub-pixel.

10. The head-up display device according to claim 1, wherein: The N white sub-pixels include bottom white sub-pixels and side white sub-pixels; The color sub-pixels and the side white sub-pixels are arranged along the first direction, and the color sub-pixels and the bottom white sub-pixels are arranged along the second direction.

11. The head-up display device according to claim 10, characterized in that: The image source further includes a white control circuit, wherein the white control circuit includes a first white control circuit and a second white control circuit; The first white control circuit is electrically connected to the bottom white sub-pixels in the plurality of pixels, and the second white control circuit is electrically connected to the side white sub-pixels in the plurality of pixels.

12. The head-up display device according to claim 1, wherein: The image source further includes a white control circuit and a color control circuit; The white control circuit is electrically connected to the white sub-pixels in the plurality of pixels, and the color control circuit is electrically connected to the color sub-pixels in the plurality of pixels.

13. The head-up display device according to claim 12, characterized in that: The grayscale of the white sub-pixel is controlled in response to the brightness of the external ambient light.

14. The head-up display device according to claim 12, wherein: The grayscale of the white sub-pixel is controlled in response to the grayscales of the color sub-pixels in the pixel.

15. A vehicle, characterized in that: The invention comprises the head-up display device according to any one of claims 1 to 14, and a windshield.

Images