CN213715606U

CN213715606U - Backlight device for HUD head-up display

Info

Publication number: CN213715606U
Application number: CN202022366704.4U
Authority: CN
Inventors: 汪华
Original assignee: Shenzhen Ancheng Technology Co ltd
Current assignee: Shenzhen Ancheng Technology Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-07-16
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a backlight device for HUD head-up display, which comprises a heat dissipation base and a light source arranged on the heat dissipation base; the light source is formed by attaching a plurality of CSP lamp beads on an aluminum substrate, and welding spots and circuits for conducting electricity are arranged on the aluminum substrate; the heat dissipation base is attached to the back face of the aluminum substrate, and a plurality of radiating fins are arranged on the face, deviating from the CSP lamp beads, of the heat dissipation base. In the prior art, an LED lamp bead point light source is used as a backlight device, but the point light source has the problems of high heating, uneven light emission and complex structure; the utility model adopts the CSP lamp bead as the backlight device, avoids the problem that the LED lamp bead bracket and the like influence the heat dissipation, has small volume, can be arranged into a surface light source with high density, effectively simplifies the structure, reduces the volume of a head-up display, and has good heat dissipation effect and long service life; replace traditional backlight unit with high density CSP lamp pearl scheme, the colour is even, and it is more stable to give out light.

Description

Backlight device for HUD head-up display

Technical Field

The utility model relates to a new line display technical field especially relates to a backlight device for HUD new line display.

Background

The head-up display is a display device which projects a main pilot instrument attitude guide indicator and main flight parameters onto the front of a helmet or a windshield of a pilot. The pilot can see the main piloting instrument and the important flight parameters thereof when looking ahead at the scene outside the aircraft. This was developed from military aircraft that typically employed head-mounted heads-up displays to facilitate flying the aircraft while searching for objects. Civil aircraft have also begun to use, generally using head-up displays on projection windshields, primarily for approach and landing.

With the development of science and technology, the head-up display is also used in the fields of automobiles and the like slowly. At present, the head-up display on the market usually adopts a point light source as a backlight device, but the problems of high heat generation, over-concentrated heat generation and uneven light emission of the point light source are to be solved in the industry.

Therefore, a backlight device with simple process, uniform light emission and convenient heat dissipation is urgently needed in the market at present and is applied to the field of HUD head-up displays.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a backlight device for HUD new line display.

The utility model adopts the technical proposal that: a backlight device for HUD head-up display comprises a heat dissipation base and a light source arranged on the heat dissipation base;

the light source is formed by attaching a plurality of CSP lamp beads on an aluminum substrate, and welding spots and circuits for conducting electricity are arranged on the aluminum substrate; the heat dissipation base is attached to the back face of the aluminum substrate, and a plurality of radiating fins are arranged on the face, deviating from the CSP lamp beads, of the heat dissipation base.

In a preferred embodiment, the aluminum substrate is attached to the heat dissipation base and then screwed.

In a preferred embodiment, the heat dissipation base is provided with at least two threaded holes for being fixedly connected with the outside.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts the CSP lamp bead as the backlight device, avoids the problem that the LED lamp bead bracket and the like influence the heat dissipation, has small volume, can be arranged into a surface light source with high density, effectively simplifies the structure, reduces the volume of a head-up display, and has good heat dissipation effect and long service life; replace traditional backlight unit with high density CSP lamp pearl scheme, the colour is even, and it is more stable to give out light.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic view of another perspective of the preferred embodiment of the present invention;

FIG. 3 is a schematic view of a heat dissipation base according to a preferred embodiment of the present invention;

fig. 4 is an exploded view of the preferred embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1-4, the present invention provides a backlight device for a HUD head-up display, which includes a heat dissipation base 2, and a light source disposed on the heat dissipation base 2;

the light source is formed by attaching a plurality of CSP lamp beads 1 on an aluminum substrate 4, and welding spots and circuits for conducting electricity are arranged on the aluminum substrate 4; the heat dissipation base 2 is attached to and connected with the back of the aluminum substrate 4, and a plurality of cooling fins 21 are arranged on one surface of the heat dissipation base 2, which is far away from the CSP lamp beads 1.

Specifically, the CSP is called chipscalepack, and chinese means a chip scale package device, which means a package device with a package size 1.2 times smaller than the chip size, without the conventional processes of die bonding and wire bonding. The CSP lamp beads 1 have the advantages of low manufacturing process equipment cost, short manufacturing process time and the size of a packaged chip is equivalent to that of a crystal grain, so that the CSP lamp beads 1 arranged in high density are used for replacing a traditional backlight device in the embodiment, the size of a head-up display can be effectively reduced, the structure is simplified, and the cost is reduced. Furthermore, because the chip and the circuit board are only separated by the solder ball or bump, the circuit transmission path can be greatly shortened, and the current loss and the probability of electromagnetic interference can be reduced. In addition, the backlight device of the embodiment has excellent heat dissipation effect because the backlight device can directly dissipate heat from the back without plastic or ceramic package. CSP lamp pearl 1 light efficiency is high, and it is more even stable to give out light.

In this embodiment, the backlight device emits light through the LCD screen 3 and then projects the light onto the reflector, so that the user can read the information on the reflector;

the LCD display screen 3 is connected with the vehicle-mounted connector and used for displaying information such as vehicle speed, oil quantity and the like on the LCD display screen 3, and it needs to be explained that the principle of the LCD display screen 3 is that the LCD display screen is conducted when electrified and is arranged in order, so that light rays can pass easily; when not powered, the array is disordered, and light is prevented from passing through. Allowing the liquid crystal to block or let light pass through like a shutter. Technically, in brief, a liquid crystal panel comprises two pieces of relatively delicate sodium-free glass material, called Substrates, sandwiching a layer of liquid crystal. When the light beam passes through the layer of liquid crystal, the liquid crystal itself is arranged and stands or twists irregularly, thereby blocking or smoothing the light beam. Most liquid crystals are organic compounds and are composed of long rod-like molecules. In the natural state, the long axes of these rod-like molecules are approximately parallel. By pouring the liquid crystal into a finely machined grooved plane, the liquid crystal molecules will follow the grooves so that if those grooves are perfectly parallel, the molecules will be perfectly parallel.

According to the above principle, work as the utility model discloses a when backlight device passes LCD display screen 3, control light through or block through LCD's display screen 3, project on-vehicle information the speculum, form images.

In the preferred embodiment of the present invention, the aluminum substrate 4 is required to be provided with a solder joint and a circuit for connecting with an external power source, so as to provide the electric energy for the CSP lamp bead 1;

the aluminum substrate 4 and the heat dissipation base 2 are preferably connected in a fitting manner and then fixed through a threaded screw, so that the CSP lamp bead 1 can dissipate heat conveniently;

the back surface (namely the surface deviating from the CSP lamp bead 1) of the heat dissipation base 2 is provided with a plurality of heat dissipation fins 21, so that the heat dissipation area of the heat dissipation base 2 is enlarged, the heat dissipation base 2 can better dissipate heat for the CSP lamp bead 1, and the service life of the CSP lamp bead 1 is prolonged;

the heat dissipation base 2 is also provided with two threaded holes 22 for fixing the CSP lamp beads 1 and the heat dissipation base 2 with the outside;

to sum up, the utility model adopts the CSP lamp beads as the backlight device, avoids the problem that the LED lamp bead bracket and the like influence the heat dissipation, has small volume, can be arranged into a surface light source with high density, effectively simplifies the structure, reduces the volume of a head-up display, and has good heat dissipation effect and long service life; replace traditional backlight unit with high density CSP lamp pearl scheme, the colour is even, and it is more stable to give out light.

The above-mentioned embodiments only express two embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A backlight device for a HUD head-up display is characterized in that the backlight device comprises a heat dissipation base and a light source arranged on the heat dissipation base;

2. The backlight device for a HUD head-up display of claim 1, wherein the aluminum substrate is attached to the heat sink base and then screwed.

3. The backlight device for a HUD head-up display of claim 1, wherein the heat-dissipating base has at least two screw holes for fixing connection with the outside.