TW201814360A - Adjustable reflector for head-up display and head-up display comprising the same - Google Patents

Abstract

An adjustable reflector for head-up display includes an adjusting frame, a reflecting element and a control module. The reflecting element is arranged on the adjusting frame for reflecting a light beam generated by an image source of the head-up display to an optical combiner of the head-up display. The control module includes an adapter and a driving unit. The adapter is configured to selectively connect to the adjusting frame at different positions on the adjusting frame. The driving unit is connected to the adapter and configured to drive the adapter to rotate for adjusting a reflecting angle of the reflecting element.

Description

Adjustable reflector of head-up display device and head-up display device containing same

The invention relates to an adjustable reflector of a head-up display device, in particular to an adjustable reflector of a head-up display device which can improve image stability.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a conventional head-up display device. Generally speaking, the conventional head-up display device 100 includes an image source 110, a lens 120, a reflector 130, and an image stack unit 140. The light beam L generated by the image source 110 is refracted by the lens 120 and then reflected by the mirror 130 to the superimposed image unit 140. The light beam L reflected to the superimposed image unit 140 forms a virtual image to provide the driver with relevant information, such as speed information, time information, and navigation information. Since different drivers have different heights and riding positions, in order to make it easier for the driver to see the information displayed by the head-up display device, the reflection angle of the reflector 130 can be adjusted to reflect the light beam L to an appropriate position on the superimposed image unit 140. . For example, when the driver's height is short, the head-up display device 100 can rotate the reflector 130 to further reflect the position of the light beam L on the superimposed image unit from the first position P1 to the lower second position P2. However, the imaging distance of the virtual image on the superimposed unit 140 is related to the travel distance of the light beam L from the lens 120 to the superimposed unit 140. When the position of the light beam L reflected on the superimposed image unit 140 is moved from the first position P1 to the second position P2, the traveling distance of the light beam L from the mirror 130 to the superimposed image unit 140 is shortened from a2 to a3, thereby changing the virtual image Imaging distance. Furthermore, when the position of the light beam L reflected on the superimposed image unit 140 is moved from the first position P1 to the second position P2, the incident angle of the light beam L will also change, thereby causing image distortion. Therefore, when the conventional head-up display device 100 adjusts the reflection angle of the reflector 130, the head-up display device 100 has a lower image stability.

The invention provides an adjustable reflector of a head-up display device, which comprises an adjusting frame, a reflecting element and a control module. The reflecting element is disposed on the adjusting frame, and is configured to reflect a light beam generated by an image source of the head-up display device to a stack of image units of the head-up display device. The control module includes a switching unit and a driving unit. The transfer unit is used for selectively connecting to different positions on the adjusting frame. The driving unit is connected to the transfer unit, and is used for driving the transfer unit to rotate to adjust the reflection angle of the reflection element.

The invention further provides a head-up display device including an image source, an image stack unit, and at least one adjustable reflector. The image source is used to generate a light beam. The superimposed image unit is used for displaying an image according to an incident light beam. An image source for generating a light beam. The adjustable reflector includes an adjusting frame, a reflecting element and a control module. The reflecting element is disposed on the adjusting frame, and is configured to reflect the light beam generated by the image source to the superimposed image unit. The control module includes a switching unit and a driving unit. The transfer unit is used for selectively connecting to different positions on the adjusting frame. The driving unit is connected to the transfer unit, and is used for driving the transfer unit to rotate to adjust the reflection angle of the reflection element.

Please refer to Figure 2 and Figure 3 at the same time. Fig. 2 is a schematic diagram of the adjustable reflector of the present invention. FIG. 3 is a schematic view of the adjustable reflector of FIG. 2 at another viewing angle. As shown in the figure, the adjustable reflector 10 of the present invention includes an adjusting frame 11, a reflecting element 13 and a control module 14. The reflecting element 13 is disposed on the adjusting frame 11. The control module 14 includes a switching unit 16 and a driving unit 15. The transfer unit 16 is used for selectively connecting to different positions on the adjusting frame 11. In this embodiment, a plurality of connection features 12 are formed on the adjusting frame 11, and the connection features 12 include perforations. The transfer unit 16 includes a connecting block 17 and a positioning pin 18. The positioning pin 18 is used to pass through the connection block 17 and through one of the plurality of connection features 12, so that the adapter unit 16 can be selectively connected to one of the plurality of connection features 12. The driving unit 15 is connected to the switching unit 16 for driving the switching unit 16 to rotate.

According to the above configuration, when the driving unit 15 drives the transfer unit 16 to rotate, the transfer unit 16 will drive the adjustment frame 11 to rotate to change the reflection angle of the reflection element 13. Furthermore, since the adapter unit 16 is selectively connected to different positions on the adjusting frame 11, the relative position between the rotating shaft 19 of the driving unit 15 and the adjusting frame 11 can be changed, thereby increasing the adjustment of the reflecting element 13. elasticity. For example, when the transfer unit 16 is connected to the middle connection feature 12 on the adjustment frame 11, the middle portion of the reflection element 13 has a smaller movement range and the two sides of the reflection element 13 have a larger movement range. When connected to the leftmost connection feature 12 on the adjusting frame 11, the movement range of the left part of the reflection element 13 is small and the movement range of the right part of the reflection element 13 is large.

In this embodiment, the reflecting element 13 is a plane mirror, but the invention is not limited thereto. In other embodiments of the adjustable reflector of the present invention, the reflective element 13 may also be a curved mirror (such as a concave mirror). The adjustable reflector of the present invention can be provided with appropriate types of reflecting elements according to design requirements. In addition, the connection feature 12 and the transfer unit 16 in FIGS. 2 and 3 are merely examples, and the present invention is not limited thereto. In other embodiments of the adjustable reflector of the present invention, the connection feature and the adapter unit may have different structures to be connected to each other, so that the adapter unit can be selectively connected to different positions on the adjusting frame.

Please refer to Figure 4. FIG. 4 is a schematic diagram of a first embodiment of the head-up display device of the present invention. As shown in FIG. 4, the head-up display device 200 of the present invention includes an image source 210, a lens 220, an adjustable reflector 10, and an image stack unit 240. The image source 210 is used to generate a light beam L according to related driving information, and the pattern of the light beam corresponds to related driving information, such as speed information, time information, and navigation information. The lens 220 is disposed between the image source 210 and the adjustable reflector 10 to refract the light beam L generated by the image source 210. The tunable reflector 10 is used to reflect the light beam passing through the lens 220 to the superimposed image unit 240. In this embodiment, the reflecting element 13 of the tunable reflector 10 is a flat mirror. After the adjustable reflector 10 reflects the light beam L onto the superimposed image unit 240, the light beam L forms a virtual image on the superimposed image unit 240 to provide the driver with relevant driving information, such as speed information, time information, and navigation information. The virtual image on the superimposed image unit 240 is superimposed on the scene in front of the driver and does not affect the driver's sight. On the other hand, a plurality of scattering units (such as a protruding structure) may be formed on the superimposed image unit 240 to scatter light, so as to further increase the visible angle range of the virtual image on the superimposed image unit 240.

In addition, the head-up display device 200 of the present invention may further include a gravity sensor 250 for sensing an included angle between the head-up display device 200 and a horizontal plane. The control module 14 may be further configured to adjust a reflection angle of the reflection element 13 according to a sensing result of the gravity sensor 250. For example, when the vehicle is going uphill, the driver's line of sight will be lowered. The control module 14 can adjust the reflection angle of the reflection element 13 according to the sensing result of the gravity sensor 250 to reflect the light beam L to the superimposed image unit. The position on 240 moves down; and when the vehicle goes downhill, the driver's line of sight will turn up. The control module 14 can adjust the reflection angle of the reflection element 13 according to the sensing result of the gravity sensor 250 to reflect the light beam L. Move up to the position on the superimposed image unit 240.

Furthermore, the head-up display device 200 of the present invention may further include an eye-tracking sensor 260 for sensing the relative position between the head-up display device 200 and a user. The control module 14 may be further configured to adjust a reflection angle of the reflection element 13 according to a sensing result of the eye tracking sensor 260. For example, when the driver's height is high, the control module 14 can adjust the reflection angle of the reflection element 13 according to the sensing result of the eye tracking sensor 260 to reflect the light beam L to the position on the superimposed image unit 240. Upward; and when the driver ’s height is short, the control module 14 may adjust the reflection angle of the reflection element 13 according to the sensing result of the eye tracking sensor 260, so that the light beam L is reflected to the position on the superimposed unit 240 Move down.

On the other hand, the control module 14 can be electrically connected to a speedometer 270 of a vehicle for adjusting the reflection angle of the reflection element 13 according to the sensing result of the speedometer 270. For example, when the speed of the vehicle is fast, the driver will look at the distance, so the driver's line of sight will be tilted up. The control module 14 can adjust the reflection angle of the reflection element 13 according to the sensing result of the speedometer 270 to The light beam L is reflected up to the position on the superimposed image unit 240; and when the speed of the vehicle is slow, the driver will look at the near place, so the driver's line of sight will be lowered. The control module 14 can The sensing result adjusts the reflection angle of the reflection element 13 so that the light beam L is reflected down to a position on the superimposed image unit 240.

Please refer to Figure 5 and Figure 4 together. FIG. 5 is a schematic diagram of the adjustable reflector of the head-up display device of FIG. 4. The head-up display device 200 of the present invention can change the relative position between the rotating shaft 19 and the adjusting frame 11 according to design requirements, so as to improve the image stability of the head-up display device 200. For example, the adapter unit 16 can be selectively connected to the leftmost connection feature 12 on the adjusting frame 11 according to design requirements. When the reflecting element 13 reflects the light beam L to the first position P1 on the superimposed image unit 240, the travel distance of the light beam L from the lens 220 to the superimposed image unit 240 is (a1 + a2). When the head-up display device 200 adjusts the adjustable reflector 10 to reflect the light beam L to the second position P2 on the superimposed image unit 240, the travel distance of the light beam L from the lens 220 to the superimposed image unit 240 is (a1 + a4 + a5). Compared to the conventional beam travel distance (a1 + a3) after the head-up display device 100 rotates the reflective element 130, the beam travel distance (a1 + a4 + a5) adjusted by the head-up display device 200 of the present invention is closer to the beam travel before adjustment Distance (a1 + a2). In other words, the imaging distance of the virtual image on the superimposed image unit 240 of the present invention is less affected by the adjustment of the adjustable reflector 10. On the other hand, compared with the incident angle of the light beam of the conventional head-up display device at the second position P2 on the superimposed image unit, the incident angle of the light beam of the head-up display device 200 of the present invention at the second position P2 of the superimposed image unit is closer to the light beam. The incident angle at the first position P1 on the superimposed image unit. In other words, the virtual image on the superimposed image unit 240 of the present invention is less deformed by the incident angle.

Please refer to FIG. 6, which is a schematic diagram of a second embodiment of the head-up display device of the present invention. In the embodiment of FIG. 6, the head-up display device 300 uses a curved mirror 230 instead of a lens. The curved mirror 230 is used to reflect the light beam L generated by the image source 210 to the reflection element 13, and the reflection element reflects the light beam L to the superimposed image unit 240 to form a virtual image. Similarly, the head-up display device 300 of the present invention can also change the relative position between the rotating shaft 19 and the adjusting frame 11 according to design requirements, so as to improve the image stability of the head-up display device 300. Since the operation of the second embodiment of the head-up display device of the present invention is similar to that of the first embodiment of the head-up display device of the present invention, it will not be described again.

Please refer to FIG. 7, which is a schematic diagram of a third embodiment of the head-up display device of the present invention. In the embodiment of FIG. 7, the reflective element 13 of the adjustable reflector 10 of the head-up display device 400 is a concave mirror. Since the concave mirror can directly reflect the light beam L generated by the image source 210 onto the superimposed image unit 240 to form a virtual image, the lens can be omitted. In addition, the distance between the concave mirror 13 and the image source 210 must be maintained constant. Therefore, the image source 210 is rotated with the adjusting frame 11. For example, the image source 210 may be connected to the adjusting frame 11 to rotate with the adjusting frame 11.

Please refer to Figure 8 and refer to Figure 7 together. FIG. 8 is a schematic diagram of the adjustable reflector of the head-up display device of FIG. 7. In this embodiment, the imaging distance of the virtual image on the superimposed image unit 240 is related to the travel distance of the light beam L from the reflection element 13 to the superimposed image unit 240. Similarly, the head-up display device 400 of the present invention can also change the relative position between the rotating shaft 19 and the adjusting frame 11 according to design requirements, so as to improve the image stability of the head-up display device 400. For example, the adapter unit 16 can be selectively connected to the leftmost connection feature 12 on the adjusting frame 11 according to design requirements. When the reflection element 13 reflects the light beam L to the first position P1 on the superimposed image unit 240, the travel distance of the light beam L from the reflective element 13 to the superimposed image unit 240 is a2. When the head-up display device 400 adjusts the adjustable reflector 10 to reflect the light beam L to the second position P2 on the superimposed image unit 240, the travel distance of the light beam from the reflection element 13 to the superimposed image unit 240 is a6. The distance of travel of the light beam a3 after the conventional head-up display device rotates the reflecting mirror is quite close to the distance of travel a6 of the light beam after the head-up display device 400 of the present invention is adjusted. However, compared with the incident angle of the light beam of the conventional head-up display device at the second position P2 on the superimposed image unit, the incident angle of the light beam of the head-up display device 400 of the present invention at the second position P2 on the superimposed image unit 240 is closer to the light beam at An incident angle of the first position P1 on the superimposed image unit 240. In other words, the virtual image on the superimposed image unit 240 of the present invention has a smaller deformation amplitude due to a change in the incident angle.

In FIGS. 4 to 8, the configuration of the head-up display device of the present invention is merely an example, and the present invention is not limited thereto. In other embodiments of the present invention, the installation positions, installation angles, and numbers of the image source 210, the lens 220, the curved mirror 230, the adjustable reflector 10, and the superimposed image unit 240 may be changed according to design requirements. For example, in addition to being placed horizontally, the adjustable reflector 10 can also be placed vertically or obliquely. Furthermore, the adapter unit 16 is not limited to being connected to the leftmost connection feature 12 on the adjusting frame 11. The transfer unit 16 can be connected to other connection features 12 on the adjusting frame 11 according to other design requirements.

Compared with the prior art, the head-up display device of the present invention can change the relative position between the rotating shaft and the adjusting frame according to design requirements, so as to increase the adjustment flexibility of the reflective element. In this way, when the head-up display device of the present invention adjusts the adjustable reflector, the variation range of the traveling distance of the light beam can be reduced, thereby making the variation of the imaging distance of the virtual image on the superimposed image unit smaller. Furthermore, the magnitude of the change in the incident angle of the light beam on the superimposed image unit can also be reduced, thereby making the distortion of the virtual image on the superimposed image unit smaller. Therefore, the adjustable reflector of the present invention can improve the image stability of the head-up display device. The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

10‧‧‧ Adjustable reflector

11‧‧‧Adjustment frame

12‧‧‧ Connectivity

13‧‧‧Reflective element

14‧‧‧Control Module

15‧‧‧Drive unit

16‧‧‧ transfer unit

17‧‧‧ Connection block

18‧‧‧ positioning pin

19‧‧‧Rotating shaft

100‧‧‧Learn head-up display device

110‧‧‧Image Source

120‧‧‧ lens

130‧‧‧Reflector

140‧‧‧ Overlay unit

200, 300, 400‧‧‧‧ Head-up display device of the present invention

210‧‧‧Image Source

220‧‧‧ lens

230‧‧‧ curved mirror

240‧‧‧ Overlay unit

250‧‧‧ gravity sensor

260‧‧‧Eye Tracking Sensor

270‧‧‧speed meter

P1‧‧‧First position

P2‧‧‧Second position

a1, a2, a3, ‧‧‧ beam travel distance

a4, a5, a6

FIG. 1 is a schematic diagram of a conventional head-up display device. Fig. 2 is a schematic diagram of the adjustable reflector of the present invention. FIG. 3 is a schematic view of the adjustable reflector of FIG. 2 at another viewing angle. FIG. 4 is a schematic diagram of a first embodiment of the head-up display device of the present invention. FIG. 5 is a schematic diagram of the adjustable reflector of the head-up display device of FIG. 4. FIG. 6 is a schematic diagram of a second embodiment of the head-up display device of the present invention. FIG. 7 is a schematic diagram of a third embodiment of the head-up display device of the present invention. FIG. 8 is a schematic diagram of the adjustable reflector of the head-up display device of FIG. 7.

Claims (15)

An adjustable reflector of a head-up display device, comprising: an adjustment frame; a reflecting element disposed on the adjustment frame to reflect a light beam generated by an image source of the head-up display device to a stack of images of the head-up display device A unit; and a control module, including: a transfer unit for selectively connecting to different positions on the adjusting frame; and a drive unit connected to the transfer unit for driving the transfer unit Turn to adjust the reflection angle of the reflection element. The adjustable reflector according to claim 1, wherein the adjusting frame is formed with a plurality of connection features, and the transfer unit is used for selectively connecting to one of the plurality of connection features. The adjustable reflector according to claim 2, wherein the plurality of connection features include perforations, and the transfer unit includes: a connection block; and a positioning pin for passing through the connection block and the plurality of connections One of the characteristics. The tunable reflector according to claim 1, wherein the reflective element is a curved mirror. The tunable reflector according to claim 1, wherein the reflective element is a flat mirror. A head-up display device includes: an image source for generating a light beam; a stack of image units for displaying an image based on an incident light beam; and at least one adjustable reflector including: an adjusting frame; a reflecting element disposed on the An adjusting frame for reflecting the light beam generated by the image source to the superimposed image unit; and a control module including: a transfer unit for selectively connecting to different positions on the adjusting frame; and The driving unit is connected to the transfer unit and is used for driving the transfer unit to rotate to adjust the reflection angle of the reflection element. The head-up display device according to claim 6, wherein the adjusting frame is formed with a plurality of connection features, and the transfer unit is used for selectively connecting to one of the plurality of connection features. The head-up display device according to claim 7, wherein the plurality of connection features include perforations, and the transfer unit includes: a connection block; and a positioning pin for passing through the connection block and the plurality of connection features one of them. The head-up display device according to claim 6, wherein the reflective element is a curved mirror. The head-up display device according to claim 6, wherein the reflective element is a flat mirror. The head-up display device according to claim 10, further comprising a curved mirror for reflecting the light beam generated by the image source to the reflecting element. The head-up display device according to claim 10, further comprising a lens disposed between the image source and the reflection element to refract a light beam generated by the image source. The head-up display device according to claim 6, further comprising a gravity sensor for sensing an included angle between the head-up display device and a horizontal plane, and the control module is further configured to detect the The measurement results adjust the included angle between the adjusting frame and the base. The head-up display device according to claim 6, further comprising an eye-tracking sensor for sensing a relative position between the head-up display device and a user, and the control module is further used for detecting the eye-tracking The sensing result of the detector adjusts the included angle between the adjusting frame and the base. The head-up display device according to claim 6, wherein the control module is electrically connected to a speedometer of a vehicle for adjusting an included angle between the adjusting frame and the base according to a sensing result of the speedometer.