TW202316174A - Picture generation unit and head-up display - Google Patents

Abstract

A picture generation unit includes a display panel, a first illumination system, and a second illumination system. The display panel has a first imaging region and a second imaging region which are adjacently arranged and located on the same plane thereof. The first illumination system provides a first light beam which is incident on the first imaging region at a first incident angle, and the first imaging region converts the first light beam into a first image beam. The second illumination system provides a second light beam which is incident on the second imaging region at a second incident angle, and the second imaging region converts the second light beam into a second image beam. The transmission path of the first light beam incident on the first imaging region does not interfere with the transmission path of the second light beam incident on the second imaging region, and the first image light beam and the second image light beam leave the display panel at different light exit angles.

Description

Image generating unit and head-up display device

The present invention relates to an optical device, and in particular to an image generating unit and a head-up display device.

Head-up displays (HUDs) are widely used in airplanes, land vehicles, and retail store windows to present information superimposed on the surrounding environment to users. Many HUDs built into vehicles have a Picture Generation Unit (PGU) and an imaging module. The imaging module projects the information image generated by the image generation unit to the outside of the windshield, so that the driver can see the driving information provided by the information system in the car without looking down at the instrument panel or navigator while driving. Information.

In the current technical architecture of the HUD, a single image generating unit can only provide a single field of view (FOV) and generate a single virtual image image, which limits the information that can be displayed on the HUD. Therefore, with the current technology, if a HUD system capable of providing two fields of view and two virtual images at the same time is required, two sets of image generating units must be used, which will increase the size of the HUD system. In addition, since the HUD system requires two sets of image generating units, the number of components required for the HUD system and production costs are increased.

The "Prior Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Prior Art" paragraph may contain some conventional technologies that do not constitute the knowledge of those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of the present invention have been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides an image generating unit and a head-up display device, wherein a single image generating unit is provided with two imaging surfaces at the same time.

Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or part or all of the above objectives or other objectives, the present invention provides an image generating unit, comprising: a display panel, a first lighting system and a second lighting system, wherein the display panel has a corresponding A first imaging surface and a second imaging surface disposed adjacent to and on the same plane; the first illumination system is used to provide a first light beam, and the first light beam is incident on the display panel at a first incident angle The first imaging surface, the first imaging surface converts the first light beam into a first image light beam; and the second illumination system is used to provide a second light beam, and the second light beam is incident with a second Angle incident on the second imaging surface of the display panel, the second imaging surface converts the second light beam into a second image light beam, wherein the transmission path of the first light beam incident on the first imaging surface and The transmission paths of the second light beam incident on the second imaging surface do not intersect with each other, and the first image light beam and the second image light beam leave the display panel at different exit angles.

In an embodiment of the present invention, the first incident angle and the second incident angle have different angles respectively.

In an embodiment of the present invention, the first lighting system includes: a first light source, a collimating lens, and a light transmission component, wherein the first light beam is emitted from the first light source and sequentially Incident to the first imaging surface via the collimating lens and the light transmission component.

In an embodiment of the present invention, the light transmission component of the first lighting system includes a reflector, and the reflector is arranged between the first lighting system and the second lighting system for The transmission path of the first light beam incident on the first imaging surface and the transmission path of the second light beam incident on the second imaging surface do not intersect each other.

In an embodiment of the present invention, wherein the first light beam emitted by the first light source passes through the collimator lens, the light transmission component, and the reflector in sequence, and is reflected by the reflector to the first imaging plane.

In an embodiment of the present invention, the first light source is one or more light emitting elements, and the light emitting elements are light emitting diodes or laser diodes.

In an embodiment of the present invention, the second lighting system includes: a second light source, a collimating lens, and a light transmission component, wherein the second light source emits the second light beam, which passes through the The collimator lens and the light transmission component are incident on the second imaging plane.

In an embodiment of the present invention, the second light source is one or more light emitting elements, and the light emitting elements are light emitting diodes or laser diodes.

In an embodiment of the present invention, the display panel is a liquid crystal display panel.

In an embodiment of the present invention, the image generating unit further includes: a diffusing element, disposed on the display panel, and located on the transmission side where the first light beam enters the first incident surface path and the transmission path on which the second light beam is incident on the second incident surface.

In an embodiment of the present invention, the diffusion element is disposed on the light incident surface of the display panel.

In an embodiment of the present invention, the image generation unit further includes: a first diffusion element disposed on the first imaging surface of the display panel; a second diffusion element disposed on the The second imaging surface of the display panel, wherein the first diffusing element and the second diffusing element have different diffusing capabilities, and the first light beam is transmitted to the first diffusing element after passing through the first diffusing element. An imaging surface, the second light beam is transmitted to the second imaging surface after passing through the second diffusing element.

The present invention also provides a head-up display device for projecting a first image beam and a second image beam onto a target element, comprising: an image generating unit, the image generating unit including: a display panel, a A first lighting system and a second lighting system; wherein, the display panel has a first imaging surface and a second imaging surface that are adjacently arranged and located on the same plane; the first lighting system is used to provide a first light beam, The first light beam is incident on the first imaging surface of the display panel at a first incident angle, and the first imaging surface converts the first light beam into the first image light beam; and the second illumination The system is used to provide a second light beam, the second light beam is incident on the second imaging surface of the display panel at a second incident angle, and the second imaging surface converts the second light beam into the second image light beam; wherein the transmission path of the first light beam incident on the first imaging surface does not intersect the transmission path of the second light beam incident on the second imaging surface, the first image light beam and the second image light beam Leaving the display panel with different light exit angles; an image transmission module, used to transmit the first image light beam and the second image light beam from the image generating unit to the target element, so as to A first virtual image and a second virtual image are respectively formed.

In an embodiment of the present invention, the first virtual image and the second virtual image have different image information and have different imaging distances relative to the target element.

In an embodiment of the present invention, the first image light beam and the second image light beam have different transmission distances in the image transmission module, and the image transmission module includes a curved mirror.

In an embodiment of the present invention, the first lighting system includes: a first light source, a collimating lens, and a light transmission component, wherein the first light beam is emitted from the first light source and sequentially Incident to the first imaging surface via the collimating lens and the light transmission component.

In an embodiment of the present invention, the light transmission component of the first lighting system includes a reflector, and the reflector is arranged between the first lighting system and the second lighting system for The transmission path of the first light beam incident on the first imaging surface and the transmission path of the second light beam incident on the second imaging surface do not intersect each other.

In an embodiment of the present invention, wherein the first light beam emitted by the first light source passes through the collimator lens, the light transmission component, and the reflector in sequence, and is reflected by the reflector to the first imaging plane.

In an embodiment of the present invention, the second lighting system includes: a second light source, a collimating lens, and a light transmission component, wherein the second light source emits the second light beam, which passes through the The collimator lens and the light transmission component are incident on the second imaging surface.

In an embodiment of the present invention, in the head-up display device, the image generating unit further includes: a first diffusing element disposed on the first imaging plane of the display panel; and a second diffusing element an element configured on the second imaging surface of the display panel, wherein the first diffusing element and the second diffusing element have different diffusing capabilities, and the first light beam passes through the first diffusing element transmitted to the first imaging surface, and the second light beam is transmitted to the second imaging surface after passing through the second diffusing element.

Based on the above, using this image generation unit architecture, through the design of the illumination system and light transmission components, it is possible to use one image generation unit to provide illumination beams to two imaging surfaces at the same time, and the two imaging surfaces can be independently The illumination systems of the respective imaging planes are provided, so that the illumination systems of the two imaging planes can have better efficiency performance. Therefore, the overall structure of the image generating unit and the head-up display device has the advantages of smaller volume, less power consumption, and lower cost.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms used are for the purpose of illustration and not for the purpose of limiting the invention.

Fig. 1 is a schematic diagram of an image generating unit according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a head-up display device according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 , the image generating unit 100 of the head-up display device 200 provides the first image beam I1 and the second image beam I2 , and projects the first image beam I1 and the second image beam I2 to the target element 220 . In this embodiment, the head-up display device 200 is, for example, used in vehicles such as automobiles, for example, installed under the dashboard of the automobile. The target element 220 is, for example, the windshield of a car. The first image light beam I1 and the second image light beam I2 are reflected by the target element 220 to the eyes E of the viewer (for example, a driver of a vehicle), so that the viewer can see different images in front of the target element 220 (windshield). The first virtual image VM1 and the second virtual image VM2 of distance and different driving information.

Fig. 1 is a schematic diagram of an image generating unit according to an embodiment of the present invention. As shown in FIG. 1 , the image generating unit 100 includes a display panel 150 , a first lighting system 110 and a second lighting system 130 . The display panel 150 includes a first imaging surface 152 and a second imaging surface 154 adjacently arranged to correspond to the first lighting system 110 and the second lighting system 130 respectively, and the first imaging surface 152 and the second imaging surface 154 are located on the display Different or related image information can be provided on the same plane of the panel 150 .

As shown in FIG. 1 , the first illumination system 110 is used to provide a first light beam L1 , and the first imaging surface 152 of the display panel 150 is located on the transmission path of the first light beam L1 . The first light beam L1 is incident on the first imaging surface 152 of the display panel 150 at the first incident angle θ1i, and the first imaging surface 152 converts the first light beam L1 into a first image light beam I1. The second illumination system 130 is used to provide the second light beam L2, the second imaging surface 154 of the display panel 150 is located on the transmission path of the second light beam L2, and the second light beam L2 enters the second image of the display panel 150 at the second incident angle θ2i surface 154 , the second imaging surface 154 converts the second light beam L2 into a second image light beam I2 .

As shown in FIG. 1 , the first illumination system 110 includes a first light source 112 , a collimator lens 114 , and a light transmission component 120 . The first light source 112 of the first lighting system 110 emits a first light beam L1 , and the first light beam L1 enters the first imaging surface 152 of the display panel 150 through the collimator lens 114 and the light transmission component 120 in sequence.

According to some embodiments, the first light beam L1 may be monochromatic light or polychromatic light, and the invention is not limited thereto. According to some embodiments, the first light source 112 of the first lighting system 110 is one or more light emitting elements. The number of light emitting elements can be determined according to requirements, which is not limited in the present invention. According to some embodiments, the light-emitting element is a light-emitting diode or a laser diode, or other elements with similar properties, and the present invention is not limited thereto.

The collimating lens 114 of the first illumination system 110 is located on the delivery path of the first light beam L1 from the first light source 112 for collimating the first light beam L1 . According to some embodiments, the collimator lens 114 makes the divergence angle of the collimated first light beam L1 smaller than 1 ^° , but it can also be other suitable angles according to system requirements, and the present invention is not limited thereto.

As shown in FIG. 1 , the light transmission component 120 of the first lighting system 110 includes a lens 122 , a lens 124 and a reflector 126 . In this embodiment, the light transmission component 120 has two lenses and one mirror, but the number of lenses and mirrors can also be other suitable numbers according to system requirements, and the present invention is not limited thereto. .

The first light beam L1 emitted by the first light source 112 sequentially passes through the collimating lens 114 , the lens 122 , the lens 124 and the mirror 126 , and is reflected by the mirror 126 to the first imaging surface 152 of the display panel 150 . By adjusting the configuration of the first light source 112, the collimator lens 114, and the light transmission component 120, especially the angle of the mirror 126, the incident angle of the first light beam L1 incident on the first imaging surface 152 can be adjusted to be the first incident angle θ1i. In this embodiment, the reflector 126 is a plane reflector. In other embodiments, the optical elements of the light transmission component 120 may also have other combinations and arrangements, and the present invention is not limited thereto.

As shown in FIG. 1 , the second illumination system 130 includes a second light source 132 , a collimator lens 134 , and a light transmission component 140 . The second light source 132 of the second illumination system 130 emits a second light beam L2 , and the second light beam L2 enters the second imaging surface 154 of the display panel 150 through the collimator lens 134 and the light transmission component 140 in sequence.

According to some embodiments, the second light beam L2 may be monochromatic light or polychromatic light, and the invention is not limited thereto. According to some embodiments, the second light beam L2 may be the same color light as the first light beam L1, or may be a different color light from the first light beam L1, and the invention is not limited thereto. According to some embodiments, the second light source 132 is one or more light emitting elements. The number of light emitting elements can be determined according to requirements, which is not limited in the present invention. According to some embodiments, the number of light emitting elements of the second light source 132 may be the same as or different from that of the first light source 112 , and the invention is not limited thereto. According to some embodiments, the light-emitting element is a light-emitting diode or a laser diode, or other elements with similar properties, and the present invention is not limited thereto.

The collimating lens 134 of the second illumination system 130 is located on the transmission path of the second light beam L2 from the second light source 132 for collimating the second light beam L2. According to some embodiments, the collimator lens 134 makes the divergence angle of the collimated second light beam L2 smaller than 1 ^° , but it can also be other suitable angles according to system requirements, and the present invention is not limited thereto.

As shown in FIG. 1 , the light transmission component 140 of the second illumination system 130 includes a lens 142 , a mirror 144 and a lens 146 . In this embodiment, the light transmission component 140 has two lenses and one mirror, but the number of lenses and mirrors can also be other suitable numbers according to system requirements, and the present invention is not limited thereto. .

The second light beam L2 emitted by the second light source 132 sequentially passes through the collimator lens 134 , the lens 142 , the mirror 144 and the lens 146 , and enters the second imaging surface 154 of the display panel 150 . By adjusting the configuration of the second light source 132 , the collimator lens 134 , and the light transmission component 140 , the incident angle of the second light beam L2 incident on the second imaging surface 154 can be adjusted to be the second incident angle θ2i. In other embodiments, the optical elements of the light transmission component 140 may also have other combinations and arrangements, and the present invention is not limited thereto.

The transmission path of the first light beam L1 incident on the first imaging surface 152 and the transmission path of the second light beam L2 incident on the second imaging surface 154 do not intersect with each other, and the first image light beam I1 and the second image light beam I2 are respectively at the first light output angle θ1o The light leaves the display panel 150 with the second light emitting angle θ2o. The first light emitting angle θ1o and the second light emitting angle θ2o are angles between the direction of the first light beam L1 and the second light beam L2 leaving the display panel 150 and the normal N.

Since the first incident angle θ1i of the first light beam L1 incident on the first imaging surface 152 is different from the second incident angle θ2i of the second light beam L2 incident on the second imaging surface 154, the optical paths of the first light beam L1 and the second light beam L2 may be different. Interference is caused, so that part of the first light beam L1 is incident on the second imaging surface 154 or part of the second light beam L2 is incident on the first imaging surface 152 , thereby causing unnecessary stray light and ghost images in subsequent images.

Therefore, as shown in FIG. 1 , the reflector 126 of the light transmission assembly 120 of the first illumination system 110 is disposed between the first illumination system 110 and the second illumination system 130, so as to make the first light beam L1 incident on the first imaging surface. The transmission path of 152 and the light path of the second light beam L2 incident on the second imaging surface 154 do not intersect each other. The reflector 126 is, for example, disposed between the two lighting systems through a housing (not shown) fixed to the head-up display. In more detail, the reflector 126 is, for example, disposed on one side of the display panel 150, and according to the actual optical path Instead, it can be inclined relative to the display panel 150 so that the first light beam L1 is incident on the first imaging surface 152 of the display panel 150 at the first incident angle θ1i. The configuration of the mirror 126 can effectively block the interference between the first light beam L1 and the second light beam L2 on the optical path of the first imaging surface 152 and the second imaging surface 154, and also provide the first illumination system 110 with The reflecting mirror is configured to meet the limitation of the first incident angle θ1i of the first light beam L1 emitted by the first illumination system 110 required by the first imaging surface 152 .

According to some embodiments, the reflective surface of the reflective mirror 126 can reflect the first light beam L1, and the other surface of the reflective mirror 126, that is, the opposite surface of the reflective surface, has a light-absorbing element to absorb the second light beam L2 incident on the reflector, so as to avoid The stray light generated by the second light beam L2 in the light path enters the light path of the first light beam L1 or enters the first imaging surface 152 of the display panel 150 .

According to some embodiments, the display panel 150 is a liquid crystal display panel 150, or other components with similar functions, and the first imaging surface 152 and the second imaging surface 152 of the display panel 150, for example, provide different image information, so that the first image beam The first virtual image VM1 and the second virtual image VM2 formed by the I1 and the second image light beam I2 can present different driving information. According to some embodiments, the first virtual image VM1 formed by the first image beam I1 may include fixed driving information, such as vehicle speed, fuel level, mileage, and speed limit, and the second virtual image VM2 formed by the second image beam I2 may include The driving information matching the road conditions, such as left and right turn signs, landmark information, warning signs, etc., is not limited in the present invention.

The image generating unit 100 further includes a diffusing element 160 , and the diffusing element 160 is located on the light path of the first light beam L1 incident on the first imaging surface 152 and the light path of the second light beam L2 incident on the second imaging surface 154 . The diffusion element 160 is disposed on the light incident surface of the display panel 150 . According to some embodiments, the image generating unit 100 may not include the diffusion element 160 , and the present invention is not limited thereto.

As shown in FIG. 1 , the diffusion element 160 includes a first diffusion element 162 and a second diffusion element 164 . The first diffusion element 162 corresponds to the first imaging surface 152 of the display panel 150 and is disposed on the first imaging surface 152 of the display panel 150 . The first light beam L1 is transmitted to the first imaging surface 152 after passing through the first diffusion element 162 . The second diffusion element 164 corresponds to the second imaging surface 154 of the display panel 150 and is disposed on the second imaging surface 154 of the display panel 150 . The second light beam L2 is transmitted to the second imaging surface 154 after passing through the second diffusion element 164 . With the first diffusing element 162 and the second diffusing element 164, the uniformity and quality of the first light beam L1 passing through the first diffusing element 162 and the second light beam L2 passing through the second diffusing element 164 can be improved respectively. According to some embodiments, the first diffusing element 162 and the second diffusing element 164 have the same or different hazes according to actual requirements to produce the same or different diffusing capabilities. In addition, in other embodiments, the first diffusing element 162 can be disposed between the first light source 112 and the first imaging surface 152 of the display panel 150, and the second diffusing element 164 can be disposed between the second light source 132 and the display panel, for example. Between the second imaging surface 154 of 150.

The image generating unit 100 shown in FIG. 1 can simultaneously generate two different image light beams with a single display panel 150 having two imaging surfaces by means of two illumination systems, and can effectively reduce the size of the image generating unit. and cost reduction. By disposing the reflector 126 , the transmission paths of the first light beam L1 and the second light beam L2 can be disjoint, and the interference between the first light beam L1 and the second light beam L2 can be avoided. In some embodiments, the number of illumination systems can be greater than two groups, and the number of imaging surfaces can also be greater than two, so as to generate more virtual images.

FIG. 2 is a schematic diagram of a head-up display device according to an embodiment of the present invention. To simplify the drawings, the first image light beam I1 and the second image light beam I2 only show the traveling directions along the optical axis.

As shown in FIG. 2 , the head-up display device 200 includes an image generation unit 100 , an image transfer module 210 and a target element 220 . The head-up display device 200 is used for projecting the first image light beam I1 and the second image light beam I2 emitted by the image generating unit 100 onto the target element 220 . The first image light beam I1 and the second image light beam I2 are reflected to the eyes E of the viewer by the target element 220, so that the viewer can watch the first virtual image VM1 and the second virtual image VM1 with different imaging distances and different image information in front of the target element 220. Virtual image VM2.

The image transmission module 210 of the head-up display device 200 is used to transmit the first image light beam I1 and the second image light beam I2 from the image generating unit 100 to the target element 220 to form a first virtual image VM1 and a second virtual image respectively. VM2.

As shown in FIG. 2 , the first image light beam I1 and the second image light beam I2 from the image generation unit 100 leave the display panel 150 of the image generation unit 100 at different first light emission angles θ1o and second light emission angles θ2o, and Incident to the image transmission module 210 . As shown in FIG. 2 , the image transfer module 210 includes an imaging mirror group 212, an imaging mirror group 214, and a curved mirror 216, wherein the imaging mirror group 212 and the imaging mirror group 214 are respectively positioned at the sides of the first image beam I1 and the second image beam I2. on the delivery path. The number and position of the lenses of the image transmission module 210 can be adjusted according to requirements, and the present invention is not limited thereto.

As shown in FIG. 2, the imaging mirror group 212 has, for example, a reflecting mirror, and the imaging mirror group 214 has, for example, a reflecting mirror. After the first image beam I1 leaves the image generating unit 100, it is reflected by the reflecting mirror (imaging mirror group 212) Incident curved mirror 216 . After the second image light beam I2 leaves the image generating unit 100 , it is reflected by the mirror (imaging mirror group 214 ) and enters the curved mirror 216 . Since the head-up display device 200 is equipped with only one display panel 150, the first light beam L1 and the second light beam L2 are respectively incident on the first incident angle θ1i and the second incident angle θ2i relative to the normal line N of the display panel 150. Corresponding imaging surfaces 152 , 154 . Furthermore, the first image light beam I1 and the second image light beam I2 leave at the first light output angle θ1o and the second light output angle θ2o with respect to the normal N of the display panel 150 respectively, and only through the above-mentioned angle design can the same The first image light beam I1 and the second image light beam I2 emitted from the display panel 150 are transmitted to the corresponding imaging mirror groups 212 and 214 respectively.

According to some embodiments, the curved mirror 216 may be a free-form mirror (free-form mirror), but not limited thereto. The curved mirror 216 is used for receiving the first image beam I1 from the imaging mirror group 212 and the second image beam I2 from the imaging mirror group 214 . The first image beam I1 and the second image beam I2 are respectively transmitted to the target element 220 by the curved mirror 216 to form a first virtual image VM1 and a second virtual image VM2 correspondingly. Since the transmission distances of the first image light beam I1 and the second image light beam I2 in the image transmission module 210 after exiting the display panel 150 are different, the first virtual image VM1 and the second virtual image VM2 have different imaging distances relative to the target element 220 . In more detail, through the image transfer module 210, the optical distance of the first image beam I1 from the image generation unit 100 to the position of the first virtual image VM1 formed by it is longer than that of the second image beam I2 from the image generation unit 100 to the position of the first virtual image VM1. The optical path of the position of the second virtual image VM2 formed by it. In other embodiments, the imaging mirror group 212 has a plurality of mirrors, and the imaging mirror group 214 has a plurality of mirrors, and the number of mirrors in the imaging mirror group 212 and the imaging mirror group 214 can be different, as long as it can achieve The transmission distances of the first image light beam I1 and the second image light beam I2 in the image transmission module 210 are different, and the present invention does not limit the number of mirrors.

FIG. 3 is a schematic diagram of a head-up display device according to another embodiment of the present invention. To simplify the drawings, the first image light beam I1 and the second image light beam I2 only show the traveling directions along the optical axis. And the head-up display device 300 in FIG. 3 is similar to the head-up display device 200 in FIG. 2 , the main differences are as follows. In this embodiment, the head-up display device 300 further includes an optical element 230 located between the image generating unit 100 and the imaging mirror group 212 and the imaging mirror group 214 .

When the optical paths of the first image beam I1 and the second image beam I2 interfere with each other in the optical path of the head-up display device, the user's eyes E will see stray light. At the same time, it is also possible to see part of the picture of the second virtual image VM2 in the first virtual image VM1, or see part of the picture of the first virtual image VM1 in the second virtual image VM2. In order to prevent the first image beam I1 and the second image beam I2 from interfering with each other on the imaging system of the head-up display device 200, the image generating unit 100 uses the mirror 126 to combine the first beam L1 that generates the first image beam I1 with the second beam L1 that generates the second image beam I1. The optical path of the second light beam L2 of the image light beam I2 is blocked. Due to the structural design of the head-up display device, the angles at which the first image beam I1 and the second image beam I2 leave the image generating unit 100 may cause the first image beam I1 and the second image beam I2 to interfere with each other. Therefore, the optical element 230 configured in the head-up display device 300 is used to separate the first image beam I1 and the second image beam I2, so that the first image beam I1 will not enter the imaging lens group 214, and the second image beam I2 will not enter the imaging system. The lens group 212 is used to ensure that stray lights interfering with each other will not appear in the first virtual image VM1 and the second virtual image VM2, so as to improve the imaging quality.

According to some embodiments, the material of the optical element 230 is a material with light absorption properties. Moreover, the position or shape of the optical element 230 can be changed according to the design of the imaging system, so as to achieve the purpose of separating the first image beam I1 and the second image beam I2 . The invention does not limit the position or shape of the optical element 230 .

According to other embodiments, the optical element 230 may also be a material with polarized light properties, such as a polarizer. As long as the included angle between the angle at which the first image beam I1 or the second image beam I2 penetrates the optical element 230 and the polarization direction of the optical element 230 is 90 degrees, the shielding of the first image beam I1 and the second image beam I2 can also be achieved. The effect of stray light. In this embodiment, the optical element 230 and the mirror 126 are respectively disposed on opposite sides of the display panel 150 , and may be disposed adjacent to the display panel 150 . In the embodiment of FIG. 3 , the reflector 126 is, for example, connected to the display panel 150 and located between the two imaging surfaces, and the optical element 230 is disposed adjacent to the display panel 150, as long as the two light beams or two image light beams can avoid mutual interference. The design of interference, the present invention is limited.

In summary, the image generating unit of the present invention can simultaneously provide illumination beams to two imaging surfaces of a display panel through two sets of illumination systems. Therefore, the size and cost of the image generating unit can be effectively reduced, and the two virtual images displayed by the head-up display device can have better imaging quality.

But the above-mentioned ones are only preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the contents of the description of the invention, All still belong to the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the scope of the patent application are only used to name elements (elements) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

100: Image generation unit 110: The first lighting system 112: The first light source 114, 134: collimating lens 120, 140: Optical transmission components 122, 124, 142, 146: lens 126, 144: reflector 130: Second lighting system 132: Second light source 150: display panel 152: The first imaging plane 154: Second imaging surface 160: Diffusion element 162: first diffusion element 164: second diffusion element 200, 300: Head-up display device 210: Image transfer module 212: Imaging mirror group 214: Sampling mirror group 216: curved mirror 220: target component 230: Optical components E: eyes I1: first image beam I2: Second image beam L1: first beam L2: second beam N: Normal VM1: first virtual image VM2: second virtual image θ1i: first incident angle θ1o: the first light output angle θ2i: Second incident angle θ2o: Second light output angle

Fig. 1 is a schematic diagram of an image generating unit according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a head-up display device according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a head-up display device according to another embodiment of the present invention.

100: Image generation unit

110: The first lighting system

112: The first light source

114, 134: collimating lens

120, 140: Optical transmission components

122, 124, 142, 146: lens

126, 144: reflector

130: Second lighting system

132: Second light source

150: display panel

152: The first imaging surface

154: Second imaging surface

160: Diffusion element

162: first diffusion element

164: second diffusion element

I1: first image beam

I2: Second image beam

L1: first beam

L2: second beam

N: Normal

θ1i: first incident angle

θ1o: the first light output angle

92i: second incident angle

θ2o: Second light output angle

Claims (20)

An image generation unit, comprising: a display panel, a first lighting system and a second lighting system, wherein The display panel has a first imaging surface and a second imaging surface adjacently arranged and located on the same plane; The first illumination system is used to provide a first light beam, the first light beam is incident on the first imaging surface of the display panel at a first incident angle, and the first imaging surface converts the first light beam forming a first image beam; and The second illumination system is used to provide a second light beam, the second light beam is incident on the second imaging surface of the display panel at a second incident angle, and the second imaging surface converts the second light beam into a second image beam, Wherein the transmission path of the first light beam incident on the first imaging surface and the transmission path of the second light beam incident on the second imaging surface do not intersect each other, the first image beam and the second image light beam are separated by Different light exit angles exit the display panel. The image generation unit according to claim 1, wherein the first incident angle and the second incident angle have different angles respectively. The image generation unit as claimed in claim 1, wherein the first illumination system includes: a first light source, a collimating lens, and a light transmission component, wherein the first light beam is emitted from the first light source and incident to the first imaging surface through the collimating lens and the light transmission component in sequence. The image generation unit as claimed in claim 3, wherein the light transmission component of the first lighting system includes a reflector, and the reflector is arranged between the first lighting system and the second lighting system Between, the transmission path for the first light beam incident on the first imaging surface and the transmission path of the second light beam incident on the second imaging surface do not intersect each other. The image generating unit according to claim 4, wherein the first light beam emitted by the first light source passes through the collimator lens, the light transmission component, and the reflector in sequence, and is captured by the The reflection mirror reflects to the first imaging surface. The image generating unit according to claim 3, wherein the first light source is one or more light emitting elements, and the light emitting elements are light emitting diodes or laser diodes. The image generating unit as claimed in claim 1, wherein the second illumination system comprises: a second light source, a collimating lens, and a light transmission component, wherein the second light beam is emitted from the second light source And incident to the second imaging surface through the collimator lens and the light transmission component in sequence. The image generation unit according to claim 7, wherein the second light source is one or more light emitting elements, and the light emitting elements are light emitting diodes or laser diodes. The image generating unit according to claim 1, wherein the display panel is a liquid crystal display panel. The image generating unit as described in claim item 1, further comprising: a diffusion element, arranged on the display panel, and located on the transmission path where the first light beam is incident on the first imaging surface and the transmission path where the second light beam is incident on the second imaging surface . The image generating unit according to claim 10, wherein the diffusion element is disposed on the light incident surface of the display panel. The image generating unit as described in claim item 1, further comprising: a first diffusion element, configured on the first imaging surface of the display panel; A second diffusing element, configured on the second imaging surface of the display panel, wherein the first diffusing element and the second diffusing element have different diffusing capabilities, and the first light beam passes through the first A diffusing element is then transmitted to the first imaging surface, and the second light beam is transmitted to the second imaging surface after passing through the second diffusing element. A head-up display device for projecting a first image beam and a second image beam onto a target element, comprising: An image generating unit, the image generating unit comprising: a display panel, a first lighting system, and a second lighting system; wherein, The display panel has a first imaging surface and a second imaging surface which are arranged adjacently and on the same plane; The first illumination system is used to provide a first light beam, the first light beam is incident on the first imaging surface of the display panel at a first incident angle, and the first imaging surface converts the first light beam into the first image beam; and The second illumination system is used to provide a second light beam, the second light beam is incident on the second imaging surface of the display panel at a second incident angle, and the second imaging surface converts the second light beam into the second image beam; Wherein the transmission path of the first light beam incident on the first imaging surface does not intersect with the transmission path of the second light beam incident on the second imaging surface, the first image beam and the second image light beam are different The light exit angle leaves the display panel; An image transfer module, used to transfer the first image light beam and the second image light beam from the image generating unit to the target element to form a first virtual image and a second virtual image respectively . The head-up display device according to claim 13, wherein the first virtual image and the second virtual image have different image information and have different imaging distances relative to the target element. The head-up display device as claimed in claim 13, wherein the first image light beam and the second image light beam have different transmission distances in the image transmission module, and the image transmission module includes a curved mirror. The head-up display device according to claim 13, wherein the first lighting system includes: a first light source, a collimating lens, and a light transmission component, wherein the first light beam is emitted from the first light source and Incident to the first imaging surface through the collimator lens and the light transmission component in sequence. The head-up display device according to claim 16, wherein the light transmission component of the first lighting system includes a reflector, and the reflector is arranged between the first lighting system and the second lighting system , so that the transmission path of the first light beam incident on the first imaging surface and the transmission path of the second light beam incident on the second imaging surface do not intersect each other. The head-up display device according to claim 17, wherein the first light beam emitted by the first light source sequentially passes through the collimator lens, the light transmission component and the reflector, and is reflected by the A mirror is reflected to the first imaging plane. The head-up display device according to claim 13, wherein the second lighting system includes: a second light source, a collimating lens, and a light transmission component, wherein the second light source emits the second light beam through The collimator lens and the light transmission component are incident on the second imaging surface. The head-up display device according to claim 13, wherein the image generating unit further includes: a first diffusion element configured on the first imaging surface of the display panel; and A second diffusion element, configured on the second imaging surface of the display panel, wherein the first diffusion element and the second diffusion element have different diffusion capabilities, and the first light beam passes through the first A diffusing element is then transmitted to the first imaging surface, and the second light beam is transmitted to the second imaging surface after passing through the second diffusing element.

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