CN219676413U - Backlight module, image generation unit, head-up display device and carrier - Google Patents

Abstract

The utility model relates to a backlight module, an image generating unit, a head-up display device and a carrier, wherein the backlight module comprises a lamp panel, a lens panel and a concave lens; the lamp panel is arranged opposite to the lens panel, a plurality of light emitting devices are arranged on one side of the lamp panel facing the lens panel, and a plurality of collimating lenses are arranged on one side of the lens panel facing the lamp panel; the light emitting devices are in one-to-one correspondence with the collimating lenses; the concave lens is arranged on one side of the lens panel away from the lamp panel; the light beam emitted by each light emitting device in the plurality of light emitting devices is reflected to the concave lens through the collimating lens corresponding to each light emitting device, and is refracted through the concave lens to form a divergent light beam. The light emitted by the backlight module has a certain divergence angle, so that the problems of poor final imaging effect and incomplete content of a display image caused by the backlight in a pure collimation direction in the related technology can be solved.

Description

Backlight module, image generation unit, head-up display device and carrier

Technical Field

The utility model relates to the technical field of display, in particular to a backlight module, an image generating unit, a head-up display device and a carrier.

Background

An image generating unit (Picture Generation Unit, PGU) is used as a core component for generating an image in a Head Up Display (HUD), and its imaging performance directly affects the product performance of the HUD.

PGUs typically include a backlight module and a display panel. In the related art, the light emitted from the backlight module is vertically incident to the display panel, and in practical sense, the light does not meet the requirement of the HUD on the backlight. The backlight in the pure collimation direction cannot meet the requirement of the HUD on the light emitting angle, so that the problem that the imaging effect of the final HUD is poor is solved, and the display panel cannot be completely covered, so that the edge part area of the display panel is not provided with the backlight, and the image content displayed by the HUD is incomplete.

Disclosure of Invention

In order to solve the problems of poor HUD imaging effect and incomplete display image content caused by backlight in a pure collimation direction in the related art, the utility model discloses a backlight module, an image generation unit, a head-up display device and a carrier, and the technical scheme is as follows:

in a first aspect of the embodiment of the utility model, a backlight module is provided, which comprises a lamp panel, a lens panel and a concave lens;

the lamp panel is arranged opposite to the lens panel, a plurality of light emitting devices are arranged on one side of the lamp panel facing the lens panel, and a plurality of collimating lenses are arranged on one side of the lens panel facing the lamp panel; the light emitting devices are in one-to-one correspondence with the collimating lenses; the concave lens is arranged on one side of the lens panel away from the lamp panel;

the light beam emitted by each light emitting device in the plurality of light emitting devices is reflected to the concave lens through the collimating lens corresponding to each light emitting device, and is refracted through the concave lens to form a divergent light beam.

In some possible embodiments, the concave lens has a size equal to or greater than the size of the lens plate.

In some possible embodiments, each light emitting device is a light emitting diode.

In a second aspect of the embodiment of the present utility model, an image generating unit is provided, including a backlight module and a display panel provided in the first aspect of the present utility model;

the display panel comprises a light incident side and a light emergent side, wherein the light incident side is one side of the display panel close to the backlight module, and the light emergent side is one side of the display panel far away from the backlight module.

In some possible embodiments, the display panel is a color liquid crystal screen.

In some possible embodiments, the display panel is a black and white liquid crystal screen.

In some possible embodiments, further comprising a light splitting structure;

the light splitting structure is positioned at the light incident side; alternatively, the light splitting structure is located at the light emitting side.

In some possible embodiments, the light splitting structure is a lenticular or slit grating, which is located on the light exit side.

A third aspect of the embodiment of the present utility model provides a head-up display device, including the image generating unit and the mirror assembly provided in the second aspect of the present utility model;

and the reflecting mirror assembly reflects the light rays emitted by the image generating unit to the imaging assembly, and forms a virtual image through reflection of the imaging assembly.

According to a fourth aspect of embodiments of the present utility model, a carrier is provided, including the head-up display device and the imaging assembly provided in the third aspect of the present utility model.

The backlight module, the image generation unit, the head-up display device and the carrier provided by the embodiment of the utility model have the following beneficial effects:

in the backlight module provided by the embodiment of the utility model, after the light beams emitted by each light emitting device on the lamp panel are collimated by the corresponding collimating lens, collimated light beams can be obtained; the collimated light beam passes through the lens panel and then enters the concave lens, and the concave lens has a divergent function on light, so that the original light beam propagation direction can be changed after the collimated light beam is refracted by the concave lens, and the light beam diverged towards the edge of the concave lens is formed, so that the light rays emitted by the backlight module can have a certain divergence angle, and the problems of poor final imaging effect and incomplete display image content caused by the backlight in the pure collimation direction in the related art can be solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an optical design of a HUD according to an embodiment of the utility model;

FIG. 2 is a schematic illustration of a prior art provided by an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an image generating unit according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of another image generating unit according to an embodiment of the present utility model;

fig. 6 is a schematic view of an application environment of a head-up display device according to an embodiment of the present utility model;

the following supplementary explanation is given to the accompanying drawings:

1-a lamp panel; 11-a light emitting device; 2-a lens panel; 21-a collimating lens; 3-concave lenses; 01-a backlight module; 02-a display panel; 021-upper polarizer; 022-upper glass substrate; 023-color filter; 024-liquid crystal; 025-lower glass substrate; 026-a lower polarizer; 03-a spectroscopic structure; 04-windshield; 05-plane mirror; 06-curved mirror.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

As shown in fig. 1, in the optical design of the HUD, the light emission angle of the image generating unit (PGU) needs to be divergent, whereas in the prior art as shown in fig. 2, the light emitted from the backlight module is perpendicularly incident to the display panel, so that the light emission angle of the image light emitted from the display panel is not divergent, and the requirements cannot be satisfied.

In view of this, first, the first aspect of the present utility model provides a backlight module, referring to fig. 3, fig. 3 is a schematic structural diagram of the backlight module provided in the embodiment of the present utility model, where the backlight module includes a lamp panel 1, a lens panel 2 and a concave lens 3;

wherein, the lamp panel 1 is arranged opposite to the lens panel 2, one side of the lamp panel 1 facing the lens panel 2 is provided with a plurality of light emitting devices 11, and one side of the lens panel 2 facing the lamp panel 1 is provided with a plurality of collimating lenses 21; the plurality of light emitting devices 11 are in one-to-one correspondence with the plurality of collimator lenses 21; the concave lens 3 is arranged on one side of the lens panel 2 far away from the lamp panel 1;

the light beam emitted by each light emitting device 11 of the plurality of light emitting devices 11 is reflected to the concave lens 3 by the collimating lens 21 corresponding to each light emitting device 11, and is refracted by the concave lens 3 to form a divergent light beam.

In the embodiment of the present utility model, each light emitting device 11 disposed on the lamp panel 1 may be configured to emit white light or light with a specific color, and after the light beam emitted by each light emitting device 11 is collimated by the corresponding collimating lens 21, a collimated light beam may be obtained; the collimated light beam passes through the lens panel 2 and then enters the concave lens 3, and the concave lens 3 has a divergent function on the light, so that the original light beam propagation direction can be changed after the collimated light beam is refracted by the concave lens 3, and a light beam diverged towards the edge of the concave lens 3 is formed; fig. 3 illustrates two light emitting devices located at the edge of the lamp panel 1, and as can be seen from fig. 3, the light emitted by the final backlight module can have a certain divergence angle, and then can be subsequently incident to the display panel at the divergence angle, so that the image light emitted by the display panel also has the light emitting angle, and the requirement of HUD optical design is met.

In some possible embodiments, the size of the concave lens 3 is greater than or equal to the size of the lens panel 2, so that the light rays emitted from the concave lens 3 can cover the lens panel 2, thus, it can be ensured that the light beam emitted from the edge of the lens panel 2 can be acted on by the concave lens 3 to form a divergent light beam.

In some possible embodiments, each light emitting device 11 is a light emitting diode (Light Emitting Diode, LED). An LED is a commonly used light emitting device that emits light by recombination of electrons and holes, and is widely used in the field of illumination.

Next, in a second aspect of the embodiment of the present utility model, an image generating unit is provided, as shown in fig. 4, fig. 4 is a schematic structural diagram of the image generating unit provided in the embodiment of the present utility model, where the image generating unit includes a backlight module 01 and a display panel 02 provided in the first aspect of the present utility model;

the display panel 02 includes a light incident side and a light emergent side, the light incident side is a side of the display panel 02 close to the backlight module 01, and the light emergent side is a side of the display panel 02 far away from the backlight module 01.

Here, the backlight module 01 refers to the above embodiment. As shown in fig. 4, each light emitting device 11 in the backlight module 01 has a certain irradiation area, and accordingly, a certain area on the display panel 02 can be illuminated, and the plurality of light emitting devices 11 should illuminate the whole display panel 02; because the light emitted by the backlight module 01 has a certain divergence angle, compared with the prior art, the light emitting devices 11 can be better ensured to illuminate the whole display panel 02; and the light emitted by the backlight module 01 is incident to the display panel 02 at a certain divergence angle, so that the image light emitted by the display panel 02 also has the light emitting angle, and the requirement of HUD optical design is met.

In some possible embodiments, as shown in fig. 5, fig. 5 is a schematic structural diagram of another image generating unit according to an embodiment of the present utility model, where the display panel 02 may be a color liquid crystal screen, and the color liquid crystal screen includes, from top to bottom, an upper polarizer 021, an upper glass substrate 022, a color filter 023, a liquid crystal 024, a lower glass substrate 025, and a lower polarizer 026.

In other possible embodiments, the display panel 02 may be a black-and-white lcd, where the black-and-white lcd is different from the color lcd only in the structure of the color filter 023.

On the basis of using a black-and-white liquid crystal screen, each light emitting device 11 on the lamp panel 1 can realize Local backlight adjustment based on a Local dimming technology (Local dimming), when Local dimming is carried out, any position and any number of light emitting devices 11 can be combined, each combination forms a backlight small area, each backlight small area can independently control backlight brightness and color, and different backlight small areas can be adjusted to different backlight brightness and colors, so that optimal contrast and picture effect can be achieved.

In some possible embodiments, as shown in fig. 5, the image generating unit further comprises a light splitting structure 03, and the light splitting structure 03 may be used to achieve the stereoscopic display effect; in this embodiment, the light splitting structure 03 is located on the light emitting side of the display panel 02; specifically, the light splitting structure 03 shown in fig. 5 is a cylindrical grating. In other embodiments, the light splitting structure 03 may also be a slit grating.

In other embodiments, the light splitting structure 03 may be located on the light incident side of the display panel 02.

The light splitting structure 03 splits the emitted image light of the display panel 02, so that after the image light is reflected by other components of the HUD, part of the light finally enters the left eye of the person, part of the light enters the right eye of the person, the images seen by the left eye and the right eye of the person finally are images with parallax, the contents of the two images are at least partially identical, the images seen by the left eye and the right eye form a pair of stereoscopic pictures with depth sense in the brain of the user, and the objects seen by the user have depth sense and spatial sense.

In addition, in a third aspect of the embodiment of the present utility model, there is further provided a head-up display device, including the image generating unit and the mirror assembly of the above embodiment of the present utility model; and the reflecting mirror assembly reflects the light rays emitted by the image generating unit to the imaging assembly, and forms a virtual image through reflection of the imaging assembly.

The head-up display device provided by the embodiment of the utility model can be applied to an automobile as a driving auxiliary instrument. As shown in fig. 6, fig. 6 is a schematic view of an application environment of a head-up display device according to an embodiment of the present utility model, when the head-up display device is applied to an automobile, an imaging component may be a windshield 04, and a reflecting mirror component may include a planar reflecting mirror 05 and a curved reflecting mirror 06; the head-up display device may be capable of generating an image from information such as vehicle speed, navigation information, warning, etc. by the image generating unit, and projecting the image to the front of the driver via the flat mirror 05, the curved mirror 06, and the windshield 04 in this order, thereby forming a virtual image immediately in front of the driver's line of sight.

It should be noted that the foregoing embodiments only provide one possible number and kind of reflecting mirrors in the reflecting mirror assembly, and in practical applications, the reflecting mirror assembly may include one or more reflecting mirrors of the same or different kinds, depending on the designed reflecting light path.

Finally, in a fourth aspect of the embodiments of the present utility model, a carrier is provided, which includes the head-up display device and the imaging assembly in the foregoing embodiments of the present utility model.

In some possible embodiments, the vehicle may include, but is not limited to, land vehicles such as automobiles, air vehicles such as aircraft (otherwise known as aircraft), or water or underwater vehicles.

The carrier embodiment, the head-up display device embodiment, the image generating unit embodiment and the backlight module embodiment are based on the same application conception.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. The backlight module is characterized by comprising a lamp panel (1), a lens panel (2) and a concave lens (3);

the light panel (1) is arranged opposite to the lens panel (2), a plurality of light emitting devices (11) are arranged on one side of the light panel (1) facing the lens panel (2), and a plurality of collimating lenses (21) are arranged on one side of the lens panel (2) facing the light panel (1); the plurality of light emitting devices (11) are in one-to-one correspondence with the plurality of collimating lenses (21); the concave lens (3) is arranged on one side of the lens panel (2) away from the lamp panel (1);

the light beams emitted by each light emitting device (11) in the plurality of light emitting devices (11) are reflected to the concave lens (3) through the collimating lens (21) corresponding to each light emitting device (11), and are refracted through the concave lens (3) to form divergent light beams.

2. A backlight module according to claim 1, wherein the size of the concave lens (3) is equal to or larger than the size of the lens panel (2).

3. A backlight module according to claim 1, wherein each light emitting device (11) is a light emitting diode.

4. An image generation unit, characterized by comprising the backlight module (01) of any one of claims 1 to 3 and a display panel (02);

the display panel (02) comprises a light incident side and a light emergent side, wherein the light incident side is the side, close to the backlight module (01), of the display panel (02), and the light emergent side is the side, far away from the backlight module (01), of the display panel (02).

5. The image generation unit according to claim 4, wherein the display panel (02) is a color liquid crystal screen.

6. The image generation unit according to claim 4, wherein the display panel (02) is a black and white liquid crystal screen.

7. The image generation unit according to claim 5 or 6, further comprising a light splitting structure (03);

the light splitting structure (03) is positioned on the light incident side; alternatively, the light splitting structure (03) is located on the light emitting side.

8. The image generation unit according to claim 7, characterized in that the light splitting structure (03) is a lenticular or a slit grating, which is located at the light exit side.

9. A head-up display device comprising the image generation unit according to any one of claims 4 to 8 and a mirror assembly;

the reflecting mirror assembly reflects the light rays emitted by the image generating unit to the imaging assembly, and a virtual image is formed through reflection of the imaging assembly.

10. A vehicle comprising the heads-up display device of claim 9 and the imaging assembly.