Modularized backlight illumination system of head-up display

Abstract

The utility model discloses a modularized backlight illumination system of a head-up display. The system aims to solve the problem that an existing HUD backlight system cannot be shared by different vehicle models. The system comprises a light source, a lens and a display, the lens is located between the light source and the display, the light source is used for providing energy and emitting light beams, the lens is used for dodging the emitted light beams, and an optical piece is arranged between the lens and the display; the optical part is of a triangular structure and is used for regulating and controlling the angle of emergent light emitted from the displayer. According to the utility model, under the condition of inconsistent imaging light paths, high uniformity of a virtual image surface can be realized by only replacing one optical piece, the backlight module is suitable for different vehicle types, the replacement of the whole backlight module is avoided, the development time of the backlight module is shortened, meanwhile, the production of a new mold is avoided, the cost is reduced, and convenience is provided for the popularization of HUD (Head Up Display).

Description

Technical Field

[0001] The utility model belongs to the technical field of head-up displays, and in particular relates to a modular backlighting system for a head-up display. Background Art

[0002] The optical module of HUD is composed of an imaging module and a backlight module. The imaging module projects the image source onto the windshield to produce a virtual image. The virtual image can display information related to the driving status of the car, such as the vehicle speed and rotation speed. The driver can understand the status of the car by looking straight ahead at the virtual image, avoiding the potential danger of looking down at the dashboard. The backlight module is responsible for illuminating the image source (the image source is generally displayed by a liquid crystal screen (TFT-LCD)). In order to ensure the viewing comfort of the driver, it is necessary to ensure the uniformity of energy distribution on the image source surface.

[0003] Due to the differences in the surface shapes of car windshields, the imaging light path of the existing head-up display (HUD) needs to be customized according to the different windshield surface shapes. The backlight module is used to illuminate the image source. In order to ensure the high uniformity of the virtual image, different backlight modules need to be customized for different imaging light paths. This will result in the backlight systems of different car bodies cannot be shared. The backlight modules need to be customized according to different car models. Not only is the development cycle long, but the backlight modules of each car model need to be produced with new molds, which increases the price of HUD and the cost is relatively high, making it difficult for HUD to enter the mid- and low-end car market. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a modular backlighting system for a head-up display, which aims to solve the problem that the existing HUD backlighting system cannot be shared by different car models.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a modular backlighting system for a head-up display, which includes a light source, a lens and a display, wherein the lens is located between the light source and the display, the light source is used to provide energy and emit a light beam, the lens is used to even the emitted light beam, and an optical component is arranged between the lens and the display; the optical component is a triangular structure, and the optical component is used to adjust the angle of light emitted from the display.

[0008] Preferably, a collimating surface is provided on the lower surface of the lens, and the collimating surface is composed of a plurality of collimating lenses. A light homogenizing surface is provided on the upper surface of the lens, and the light homogenizing surface is composed of light homogenizing lenses.

[0009] Furthermore, a groove is formed on the lower surface of the collimating surface, and the light source is installed inside the groove.

[0010] Furthermore, a plurality of micro-array surfaces composed of micro-lenses are installed on the inner wall of the light-homogenizing surface, and the micro-array surface is used to redistribute the energy of light to ensure uniform illumination on the display.

[0011] Furthermore, the width of the left side of the light homogenizing surface is greater than the width of the right side.

[0012] Furthermore, the width of the optical element gradually decreases from the left end to the right end.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can achieve high uniformity of the virtual image surface by replacing only one optical component when the imaging light path is inconsistent, avoiding the replacement of the entire backlight module, reducing the time for backlight module development, and avoiding the production of new molds, thereby reducing costs and facilitating the popularization of HUD. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an existing backlight system.

[0016] Figure 2 It is a structural diagram of the angle between the outgoing light of the backlight module and the image source surface.

[0017] Figure 3 It is a structural diagram of the angle between the outgoing light of the backlight module and the image source surface.

[0018] Figure 4 It is a structural schematic diagram of the modular backlighting system of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the optical component of the utility model.

[0020] The markings in the accompanying drawings are: 1, light source; 2, lens; 3, display; 4, optical component; 5, collimating surface; 6, uniform light surface; 7, groove; 8, microarray surface; 401, first angle; 402, second angle; 403, third angle; 111, backlight module; 112, image source surface; 113, outgoing light. DETAILED DESCRIPTION

[0021] This specific embodiment is a head-up display modular backlighting system, and its structural schematic diagram is as follows: Figure 1-Figure 5As shown, the system includes a light source 1, a lens 2 and a display 3, wherein the lens 2 is located between the light source 1 and the display 3, the light source 1 is used to provide energy and emit a light beam, the lens 2 is used to homogenize the emitted light beam, and an optical component 4 is arranged between the lens 2 and the display 3; the optical component 4 is a triangular structure, and the optical component 4 is used to adjust the angle of the outgoing light 113 emitted from the display 3.

[0022] like Figure 4 As shown: In this embodiment, the lower surface of the lens 2 is provided with a collimating surface 5, and the collimating surface 5 is composed of a plurality of collimating lenses. The upper surface of the lens 2 is provided with a homogenizing surface 6, and the homogenizing surface 6 is composed of homogenizing lenses.

[0023] In this way, the light emitted by the light source 1 will first pass through the collimating surface 5 of the lens 2. The collimating surface 5 will gather and collimate the large-angle light emitted by the light source 1 to better control the light. The light collimated by the collimating surface 5 reaches the light distribution and uniform light surface 6. The curved surface of the uniform light surface 6 will diverge or converge the collimated light according to predetermined requirements.

[0024] like Figure 4 As shown: In this embodiment, a groove 7 is provided on the lower surface of the collimating surface 5, and the light source 1 is installed inside the groove 7. In this way, the light source 1 can be embedded in the groove 7, which is very convenient to install and ensures that light is emitted in all directions.

[0025] like Figure 4 As shown: In this embodiment, a plurality of micro-array surfaces 8 composed of micro-lenses are installed on the inner wall of the light-homogenizing surface 6. The micro-array surface 8 is used to redistribute the energy of light to ensure uniform illumination on the display 3.

[0026] In this arrangement, since the light distribution homogenizing surface 6 on the homogenizing surface 6 can be composed of a micro-array surface 8, the micro-array surface 8 will redistribute the energy of the light, thereby ensuring uniform illumination on the LCD display 3 and improving driving comfort.

[0027] like Figure 4 As shown: in this embodiment, the width of the left side of the light-evening surface 6 is greater than the width of the right side. This arrangement can increase the area of ​​the light-evening surface 6 and improve the utilization rate of light energy.

[0028] In this arrangement, when the optical element 4 with a different tilt angle is replaced, the outgoing light 113 passing through the optical element 4 will be deflected, and the angle Q between the outgoing light 113 emitted from the light source 1 and the normal of the display 3 will change.

[0029] For example, in an optional embodiment, Figure 4 and Figure 5As shown: the width of the optical element 4 gradually decreases from the left end to the right end, and the optical element 4 includes a first angle 401, a second angle 402 and a third angle 403. The first angle 401 and the second angle 402 are the same, and the angles of the first angle 401 and the second angle 402 are both 8085°, and the angle of the third angle 403 is 1020°.

[0030] Working principle: Figure 2 and Figure 3 The backlight module 111 and the image source surface 112 corresponding to different imaging light paths are drawn in FIG. Due to the inconsistency of the windshield, the designed imaging light paths are different, which is mainly manifested in that the angle Q between the outgoing light 113 emitted from the image source surface 112 and the normal line of the image source surface 112 is inconsistent. In order to ensure high uniformity of the image surface, it is necessary to redesign the backlight module 111 and the imaging module to better match, such as Figure 1 The following is a diagram of an existing backlight system: Figure 4 The figure shows a modular backlighting system of a head-up display of the present invention. An optical component 4 is arranged between a lens 2 and an LCD display 3. Light emitted by a light source 1 first passes through a collimating surface 5 of a lens 2. The collimating surface 5 collects and collimates the large-angle light emitted by the light source 1 to facilitate better control of the light. The light collimated by the collimating surface 5 reaches a light distribution and homogenizing surface 6. The curved surface of the homogenizing surface 6 diverges or gathers the collimated light according to predetermined requirements. Since the light distribution and homogenizing surface 6 on the homogenizing surface 6 can be composed of a micro-array surface 8, the micro-array surface 8 redistributes the energy of the light to ensure uniform illumination on the LCD display 3 and improve driving comfort.

[0031] Since a triangular-structured optical component 4 is provided between the lens 2 and the display 3, when the optical component 4 with a different inclination angle is replaced, the outgoing light 113 will be deflected by the optical component 4. At this time, the angle Q between the outgoing light 113 emitted from the light source 1 and the normal of the display 3 will change, so that the optical component 4 is used to adjust the size of the angle between the outgoing light 113 emitted from the light source 1 and the normal of the display 3. For different imaging light paths, the modularization of the backlight can be achieved by only replacing the optical component 4, and the uniformity of the virtual image surface will not be destroyed, that is, the virtual image is still highly uniform, so only one optical component needs to be replaced, which is suitable for different vehicle models and avoids replacing the entire backlight module, thereby reducing the time for developing the backlight module and avoiding the production of new molds, thereby reducing costs and providing convenience for the popularization of HUD.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A modular backlighting system for a head-up display, the system comprising a light source (1), a lens (2) and a display (3), characterized in that: The lens (2) is located between the light source (1) and the display (3); the light source (1) is used to provide energy and emit a light beam; the lens (2) is used to homogenize the emitted light beam; and an optical component (4) is provided between the lens (2) and the display (3); The optical component (4) is a triangular structure, and is used to adjust the angle of the light emitted from the display (3).

2. The head-up display modular backlighting system according to claim 1, characterized in that: The lower surface of the lens (2) is provided with a collimating surface (5), and the collimating surface (5) is composed of a plurality of collimating lenses. The upper surface of the lens (2) is provided with a light homogenizing surface (6), and the light homogenizing surface (6) is composed of light homogenizing lenses.

3. The head-up display modular backlighting system according to claim 2, characterized in that: The lower surface of the collimating surface (5) is provided with a groove (7), and the light source (1) is installed inside the groove (7).

4. The head-up display modular backlighting system according to claim 3, characterized in that: The inner wall of the light-homogenizing surface (6) is provided with a plurality of micro-array surfaces (8) composed of micro-lenses, and the micro-array surfaces (8) are used to redistribute the energy of light to ensure uniform illumination on the display (3).

5. The head-up display modular backlighting system according to claim 4, characterized in that: The left side width of the light homogenizing surface (6) is greater than the right side width.

6. The head-up display modular backlighting system according to claim 5, characterized in that: The width of the optical element (4) gradually decreases from the left end to the right end.

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