CN213814197U

CN213814197U - Hud backlight illumination system

Info

Publication number: CN213814197U
Application number: CN202022500690.0U
Authority: CN
Inventors: 张涛; 杨凯; 吕涛
Original assignee: Jiangsu Zejing Automobile Electronic Co ltd
Current assignee: Jiangsu Zejing Automobile Electronic Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-07-27
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses an hud backlight system belongs to lighting system technical field. It includes: an LED patch board emitting an LED light source; the collimating lens group is opposite to the LED patch board and is used for collimating and emitting; a shaping array lens which is opposite to the collimating lens group and is used for carrying out vertical light ray angle diffusion and transverse light ray angle diffusion on the light beam; and an LCD receiving the diffused homogenized light beam; the LED film sticking plate, the collimating lens group, the shaping array lens and the LCD are sequentially arranged, one surface of the shaping array lens is provided with a plurality of horizontal direction strip-shaped grooves, and the other surface of the shaping array lens is provided with a plurality of vertical direction strip-shaped grooves. Therefore, compare prior art, the utility model discloses be difficult for overheated burnout, the volume is less, the lower advantage of cost.

Description

Hud backlight illumination system

Technical Field

The utility model relates to a lighting system technical field, concretely relates to hud backlight lighting system.

Background

Automobile windshield formula new line display (HUD) formula can present the display device that drives required information and avoid the driver to need to look over instrument information low on the windshield before the car, has aroused the interest of numerous producers and consumer, and along with the development of HUD design, HUD backlight system requires that low power can provide the even image of hi-lite and require that optical element is small in quantity to the cost is lower. Therefore, the invention mainly relates to a combination of only light converging optical elements and a shaping array lens, which can simultaneously improve the light energy utilization rate and the image uniformity.

The prior art is realized by the following steps: as shown in fig. 1, light emitted by the LED patch is relatively collimated by the total reflection lens (1), and then is homogenized by the fly eye lens (2), the homogenized light beam passes through the plano-convex lens (3) to control the angle of the light beam, the light beam emitted by the plano-convex lens is subjected to beam turning by the plane mirror (4), the turned light beam is subjected to convergence and shaping by the biconvex lens (5), and finally enters the LCD screen by the diffusion plate (6), and finally the angle control and the image light homogenization processing are realized.

The HUD mode of being shaded adopts total reflection formula lens, fly-eye lens, plane mirror and a plurality of plastic lens to carry out even light, the angle size and the trend of control light beam, many lens designs cause the utilization ratio of light energy to be lower because the light absorption loss of each lens, in order to reach final image luminance and homogeneity, need increase LED paster quantity or improve LED paster power, very easily cause LCD screen temperature rise too high and burn out the phenomenon this moment, and many lens that many lens mode used are many, cause the design volume great, the cost is higher. Therefore, a new technical solution is needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides an hud backlight system solves the easy overheated burnout that prior art exists, and the volume is great, the higher problem of cost.

In order to achieve the above object, the technical solution of the present invention is that: an hud backlighting system, comprising:

an LED patch board emitting an LED light source;

the collimating lens group is opposite to the LED patch board and is used for collimating and emitting;

a shaping array lens which is opposite to the collimating lens group and is used for carrying out vertical light ray angle diffusion and transverse light ray angle diffusion on the light beam; and

an LCD receiving the diffused homogenized light beam;

the LED film sticking plate, the collimating lens group, the shaping array lens and the LCD are sequentially arranged, one surface of the shaping array lens is provided with a plurality of horizontal direction strip-shaped grooves, and the other surface of the shaping array lens is provided with a plurality of vertical direction strip-shaped grooves.

Preferably, the collimating lens group is a combination of a plurality of spherical convex lenses for collimating light sources emitted by the LED light emitting patches on the LED patch board.

Preferably, the focal length of the shaping array lens is negative, and the shaping array lens is made of a lens element with a divergence effect.

Preferably, the shaping array lens has a first transmission surface opposite to the collimating lens group and a second transmission surface opposite to the LCD, the first transmission surface is a microarray surface having a plurality of horizontal stripe-shaped grooves, and the second transmission surface is a microarray surface having a plurality of vertical stripe-shaped grooves.

Compared with the prior art, the utility model has the advantages of as follows: the utility model provides an hud lighting system during operation in a poor light, the LED light source carries out the collimation outgoing through collimating lens group, carry out horizontal light angle diffusion through the shaping array lens after vertical light angle diffusion through the shaping array lens one side, be favorable to matcing follow-up imaging optical system angle, and the two-sided horizontal vertical bar recess of shaping array lens forms crossing network structure and has dodging characteristic, the light beam after the diffusion dodging reachs the LCD screen through the transmission this moment, realize ultimate improvement light energy utilization and image uniformity's purpose, reduce the backlight unit device simultaneously, effective reduce cost, reduce and occupy the volume, also need not to increase LED paster quantity or improve LED paster power, avoid the system overheat to burn out. Therefore, compare prior art, the utility model discloses be difficult for overheated burnout, the volume is less, the lower advantage of cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic view of a viewing angle of the present invention;

fig. 3 is a schematic view of another perspective of the present invention;

fig. 4 is a schematic structural diagram of the assembled structure of the present invention.

In the figure: the LED light source comprises a total reflection lens 1, a fly-eye lens 2, a plano-convex lens 3, a plane reflector 4, a biconvex lens 5, a diffusion plate 6, an LED patch plate 10, a collimating lens group 20, a shaping array lens 30, an LCD40, a first transmission surface 50, a second transmission surface 60 and a protective shell 70.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1-4, fig. 1 is a schematic diagram of a prior art structure; FIG. 2 is a schematic view of a viewing angle of the present invention; fig. 3 is a schematic view of another perspective of the present invention; fig. 4 is a schematic structural diagram of the assembled structure of the present invention.

The utility model provides an hud backlight lighting system, include:

an LED patch panel 10 emitting an LED light source; the LED patch board 10 is provided with a plurality of LED light-emitting patches, and the LED light-emitting patches emit LED light sources after being electrified.

A collimating lens group 20 opposite to the LED chip board 10 for collimating and emitting; the collimating lens group 20 is a combination of a plurality of spherical convex lenses for collimating the light emitted from the LED light emitting patches on the LED patch board 10. In the optical field, light rays emitted after incident light rays are reflected or refracted by an object are called outgoing light rays. An opposite optical term to the incident ray; collimation: generally speaking, the light rays are kept parallel, and generally the light rays are divergent, that is, two adjacent light rays are separated from each other more and more after propagation. Collimated light emission means controlling and maintaining parallelism between the emitted light rays.

A shaping array lens 30 opposite to the collimating lens group 20 for performing vertical ray angle diffusion and horizontal ray angle diffusion on the light beam; in this embodiment, the focal length of the shaping array lens 30 is negative, and the material is a lens element with a divergent effect.

And an LCD40 that receives the diffused homogenized beam; of course, the system further includes some fixed components, such as a protective case 70 and some detachable mounting structures, and the collimating lens group 20 and the shaping array lens 30 are fixed in the protective case of the backlight illumination system in the detachable mounting structures. The detachable mounting structure may be in the form of a snap, a threaded connection, etc., in this embodiment in the form of a snap. Since it is not the focus of the present invention, it will not be described in detail herein.

The LED patch board 10, the collimating lens group 20, the shaping array lens 30 and the LCD40 are sequentially arranged, one surface of the shaping array lens 30 is provided with a plurality of horizontal strip-shaped grooves, and the other surface of the shaping array lens is provided with a plurality of vertical strip-shaped grooves. The strip-shaped groove is different from a common groove of people, and has a small shape, namely a tiny shape.

The shaping array lens 30 has a first transmission surface 50 opposite to the collimating lens group and a second transmission surface 60 opposite to the LCD, the first transmission surface being a micro-array surface having a plurality of horizontal stripe-shaped grooves, and the second transmission surface being a micro-array surface having a plurality of vertical stripe-shaped grooves.

During operation, the LED light source carries out collimation outgoing through collimating lens group, carry out horizontal light angle diffusion through the plastic array lens another side after the vertical light angle diffusion through plastic array lens one side, be favorable to matcing follow-up imaging optical system angle, and the horizontal vertical bar recess of two-sided horizontal vertical of plastic array lens constitutes crossing network structure and has dodging characteristic, the light beam after the diffusion dodging reachs the LCD screen through the transmission this moment, realize ultimate improvement light energy utilization ratio and image homogeneity's purpose, reduce the backlight unit device simultaneously, effective reduce cost, reduce and occupy the volume, also need not to increase LED paster quantity or improve LED paster power, avoid the system overheat to burn out.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An hud backlighting system, comprising:

an LED patch board emitting an LED light source;

an LCD receiving the diffused homogenized light beam;

2. An hud backlighting system of claim 1, wherein: the collimating lens group is a combination of a plurality of spherical convex lenses for collimating light sources emitted by the LED luminous patches on the LED patch board.

3. An hud backlighting system of claim 1, wherein: the focal length of the shaping array lens is negative, and the shaping array lens is made of a lens element with a divergent effect.

4. An hud backlighting system of claim 1, wherein: the shaping array lens is provided with a first transmission surface opposite to the collimating lens group and a second transmission surface opposite to the LCD, the first transmission surface is a micro-array surface with a plurality of horizontal strip-shaped grooves, and the second transmission surface is a micro-array surface with a plurality of vertical strip-shaped grooves.