TW202020509A - Projection device capable of adjusting virtual image distance and projection method thereof - Google Patents

Abstract

A projection device capable of adjusting virtual image distance and a projection method thereof are disclosed. The projection device includes a housing, and a picture generation unit, a first mirror set, a second mirror set, a third mirror set, and a fourth mirror set accommodated in the housing. The picture generation unit is disposed adjacent to the first side and is configured to provide an image projection light source. The first mirror set is pivotally disposed on the second side and aligned with the picture generation unit. The second mirror set is pivotally disposed on the first side and aligned with the first mirror set. The third mirror set and the fourth mirror set are respectively pivotally disposed on the first side surface and the second side surface. The third mirror set and the fourth mirror set are aligned with each other. The third mirror set is further aligned with the first mirror set and the fourth mirror set is aligned with the second mirror set. When the first mirror set is selectively rotated, an virtual image is generated at one of the first virtual image distance and the second virtual image distance.

Description

Projection device capable of adjusting distance of virtual image and projection method thereof

This case relates to a projection device, especially a projection device capable of adjusting the distance of a virtual image and its projection method.

Head-up display (HUD) is a principle that uses optical reflection to project important relevant information on a piece of front-view glass. The text and images projected on the coated lens (refractor) can be reflected into the user's eyes. When the user looks forward through the HUD, the user can easily merge the external scene with the HUD display data to solve the problem of looking down at the display and data of the instrument, always maintain the attitude of looking up, and reduce the speed of ignoring the external environment between the head and the head. Changes and eye focal lengths require constant adjustment of delays and discomfort.

However, the current head-up displays or Augmented Reality (AR) projection technology products can only provide a fixed virtual image distance (Virtual Image Distance VID). The so-called virtual image distance refers to the image focus to Eye distance. When the focal length of the eye is focused on one of the real or virtual images, the other object must be out of focus (blurred) image. If the object that the eyes are watching (focusing on) is beyond the distance of the virtual image, the projected virtual image will appear blurred, and at the same time, the user will feel that the virtual image is separated from the real world. Taking a conventional car head-up display as an example, the image data displayed by the head-up display and the physical image of the road ahead are not on the same plane, and the driver’s eyes must also be frequent between the actual road information and the image data displayed by the head-up display. Switch to adjust the focus of the eyes. Although the projection technology of the conventional head-up display solves the problem of head-down, frequent adjustment of the focus will also cause visual fatigue and fail to achieve a complete fusion display. The general driver's attention is mainly about 20 meters in front, but the current head-up display on the market can only make the virtual image distance up to 3 meters, which limits the display effect of the head-up display.

In view of this, it is necessary to provide a projection device capable of adjusting the distance of a virtual image and a projection method thereof to solve the problems that cannot be solved by conventional techniques.

The purpose of this case is to provide a projection device capable of adjusting the distance of a virtual image and a projection method thereof. By adding a plurality of selectively rotating mirror groups between the optical machine such as a Picture Generation Unit (PGU) and the exit end of the projection device, at least two or more different virtual image distances can be generated in combination, In order to achieve a projection device that can adjust the distance of the virtual image, and then adjust to the optimal virtual image distance according to the actual application requirements of the user, the purpose of focusing the imaging of the virtual image of the projection device and the physical target image on the same plane is achieved.

The purpose of this case is to provide a projection device capable of adjusting the distance of a virtual image and a projection method thereof. The projection device can control the selective rotation of the complex array lens group according to the physical target distance of the user's observation of the actual image, so that the projection image device generates an optimized virtual image distance, and then the virtual image of the projection device and the physical target image are focused on the same plane The purpose of imaging.

To achieve the foregoing objective, the present invention provides a projection device including a housing, a picture generation unit (PGU), a first mirror group, a second mirror group, a third mirror group, and a fourth mirror group. The casing has a first side, a second side and an open end, wherein the first side and the second side are opposite to each other. The picture generating unit is accommodated in the housing, adjacent to the first side, and provided with an image projection light source. The first mirror group is accommodated in the casing, is pivotally arranged on the second side, and corresponds to the picture generating unit, and is equipped with a reflective image projection light source. The second mirror group is accommodated in the housing, is pivotally arranged on the first side, adjacent to the open end, and corresponds to the first mirror group. The third mirror group and the fourth mirror group are accommodated in the housing and are respectively pivotally arranged on the first side and the second side. The third mirror group and the fourth mirror group correspond to each other, and the third mirror group corresponds to the first mirror Group, the fourth mirror group corresponds to the second mirror group. When the first mirror group is selectively rotated and the image projection light source is reflected to the second mirror group and output through the exit end, a first virtual image is generated at a first virtual image distance, and the first mirror group is selectively rotated And when the image projection light source is reflected to the second mirror group through the third mirror group and the fourth mirror group and output through the exit end, a second virtual image is generated at a second virtual image distance.

In an embodiment, the projection device further includes a fifth mirror group and a sixth mirror group, which are accommodated in the housing and are pivotally arranged on the first side and the second side, respectively, the fifth mirror group and the sixth mirror group Corresponding to each other, and the fifth mirror group corresponds to the first mirror group, and the sixth mirror group corresponds to the third mirror group. When the first mirror group rotates selectively and reflects the image projection light source through the fifth mirror group, the sixth mirror group, the third mirror group and the fourth mirror group to the second mirror group, a third virtual image distance is generated A third virtual image.

In one embodiment, the projection device further includes a processor and a distance detection module. The processor is connected to the picture generating unit and the first mirror group, and is configured to control the generation of the image projection light source and the rotation of the first mirror group. The distance detection module is connected to the processor, configured to detect a physical target distance, and transmit the physical target distance to the processor, wherein the processor controls the first mirror group to rotate selectively according to the physical target distance.

In one embodiment, the distance detection module includes an eye tracker (eye tracker), which is connected to the processor and configured to detect the position of a user's eyeball; and a distance detector , Connected to the processor, configured to detect the physical target distance according to the position of the user's eyeball.

In one embodiment, the projection device further includes a light source detector connected to the processor, configured to detect an external light source intensity, and transmitted to the processor, wherein the processor adjusts the image according to the external light source intensity and the physical target distance control The brightness of the projection light source.

In an embodiment, the projection device further includes a storage device, connected to the processor, and configured to store a plurality of detection distances and a first mirror group, a second mirror group, and a third mirror group respectively corresponding to the plurality of detection distances , The complex mirror rotation angle parameter of the fourth mirror group, the fifth mirror group and the sixth mirror group.

In an embodiment, the second mirror group includes a concave mirror, and the first mirror group, third mirror group, fourth mirror group, fifth mirror group, and sixth mirror group each include a plane mirror.

To achieve the foregoing purpose, the present case provides a projection method of a projection device that can adjust a plurality of virtual image distances and the brightness of an image projection light source. The projection device is configured to selectively generate at least two virtual image distances and an image projection light source. Brightness, the projection method includes the steps of: (a) detecting a physical target distance and an external light source intensity; (b) based on the physical target distance, the projection device selects a virtual image distance from the plurality of virtual image distances; and (c) According to the intensity of the external light source and the distance of the physical target, the brightness of the image projection light source is controlled and adjusted to project a virtual image.

In one embodiment, step (a) further includes the steps of: (a1) detecting the position at which the user's eyeball is looking; and (a2) detecting the physical target distance according to the position at which the user's eyeball is looking.

In an embodiment, the plurality of virtual image distances includes a first virtual image distance and a second virtual image distance, and the projection device includes: a housing having a first side and a second side, wherein the first side Opposite to the second side; a picture generating unit, housed in the housing, adjacent to the first side, and configured to provide an image projection light source; a first mirror group, housed in the housing, pivotally arranged at the first Two sides, corresponding to the picture generating unit, equipped with a reflective image projection light source; a second mirror group, housed in the housing, pivotally arranged on the second side, and corresponding to the first mirror group; and a third mirror group and A fourth mirror group is accommodated in the housing and is respectively pivotally arranged on the first side and the second side. The third mirror group and the fourth mirror group correspond to each other, and the third mirror group corresponds to the first mirror group. The four mirror groups correspond to the second mirror group; wherein when the first mirror group selectively rotates and reflects the image projection light source to the second mirror group, a virtual image is generated at the first virtual image distance, and selectively at the first mirror group When rotating and reflecting the image projection light source through the third mirror group and the fourth mirror group to the second mirror group, a second virtual image is generated at the second virtual image distance.

In one embodiment, the at least two virtual image distances further include a third virtual image distance, and the projection device includes: a fifth mirror group and a sixth mirror group, which are accommodated in the housing and are respectively pivotally arranged on the first The side and the second side, the fifth mirror group and the sixth mirror group correspond to each other, and the fifth mirror group corresponds to the first mirror group, and the sixth mirror group corresponds to the third mirror group; wherein the first mirror group is selectively rotated and When reflecting the image projection light source through the fifth mirror group, the sixth mirror group, the third mirror group and the fourth mirror group to the second mirror group, a third virtual image is generated at the third virtual image distance.

In an embodiment, the projection device further includes a storage device and a processor, the storage device is connected to the processor, and is configured to store a plurality of detection distances and corresponding to the plurality, respectively, the first mirror group, the second mirror group, The complex mirror rotation angle parameters of the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group, wherein step (b) includes the steps of: (b1) reading a plurality of detection distances and respectively corresponding to the plurality of The detection angle of the complex mirror rotation angle of the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group; and (b2) compare the physical target distance with A plurality of detection distances, select one of the plurality of detection distances, and according to the selected detection distance corresponding to the first mirror group, second mirror group, third mirror group, fourth mirror group, fifth mirror The mirror rotation angle of the group and the sixth mirror group selectively rotates the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group to generate the first virtual One of the image distance, the second virtual image distance and the third virtual image distance.

In one embodiment, the third virtual image distance is three times the first virtual image distance, and the second virtual image distance is twice the first virtual image distance.

In an embodiment, the second mirror group includes a concave mirror, and the first mirror group, third mirror group, fourth mirror group, fifth mirror group, and sixth mirror group each include a plane mirror.

Some typical embodiments embodying the features and advantages of this case will be described in detail in the description in the following paragraphs. It should be understood that this case can have various changes in different forms, and it does not deviate from the scope of this case, and the descriptions and illustrations therein are essentially used for explanation, not for limiting this case.

FIG. 1 is a block diagram showing the structure of the projection device of the first preferred embodiment of the present case. FIG. 2 is a schematic diagram showing the structure of the projection device according to the first preferred embodiment of this case when generating the first virtual image distance. FIG. 3 is a schematic structural diagram showing the projection device of the first preferred embodiment of the present case when generating the second virtual image distance. First, as shown in FIGS. 2 and 3, in this embodiment, the projection device 1 includes at least a housing 2, a picture generation unit (PGU) 10, and a first mirror group 11. A second mirror group 12, a third mirror group 13 and a fourth mirror group 14. The casing 2 has a first side 2a, a second side 2b and an open end 2c, wherein the first side 2a and the second side 2b are opposite to each other. The picture generating unit 10 is accommodated in the housing 2 and is adjacent to the first side 2a, and is provided with an image projection light source. In other embodiments, the picture generating unit 10 is further fixed on the casing 2 by a pivot connection, and can rotate relative to the casing 2, but it does not limit the necessary technical features of this case, and will not be repeated here. In this embodiment, the first mirror group 11 is accommodated in the housing 2 and is pivotally arranged on the second side 2b, and corresponds to the picture generating unit 10, and is equipped with a reflective image projection light source. The second mirror group 12 is accommodated in the housing 2 and is pivotally arranged on the first side 2a, adjacent to the open end 2c, and corresponding to the first mirror group 11. In addition, the third mirror group 13 and the fourth mirror group 14 are also accommodated in the housing 2 and are respectively pivotally disposed on the first side 2a and the second side 2b. The third mirror group 13 and the fourth mirror group 14 correspond to each other, and the third mirror group 13 corresponds to the first mirror group 11 and the fourth mirror group 14 corresponds to the second mirror group 12. In this embodiment, the picture generating unit 10, the third mirror group 13 and the second mirror group 12 may be sequentially and equally spaced on the first side 2a of the housing 2, the first mirror group 11 and the fourth The mirror sets 14 are also sequentially and equally spaced on the second side 2b of the housing 2. In addition, the distance between the first side 2a and the second side 2b of the housing 2 is greater than the distance between the picture generating unit 10, the third mirror group 13 and the second mirror group 12, and greater than the distance between the first mirror group 11 and the fourth The distance between the mirror groups 14 is not limited to this case. In this embodiment, the projection device 1 can generate at least two different virtual image distances. For example, when the first mirror group 11 selectively rotates and reflects the image projection light source to the second mirror group 12 and outputs it through the exit end 2c, a virtual image is generated at a first virtual image distance D1, as shown in FIG. 2 . For another example, when the first mirror group 11 selectively rotates and reflects the image projection light source through the third mirror group 13 and the fourth mirror group 14 to the second mirror group 12 and outputs it through the exit end 2c, a second virtual image The distance D2 produces a virtual image, as shown in Figure 3. In this embodiment, by adjusting the optical path length of the image projection light source, the second virtual image distance D2 can be, for example, twice the first virtual image distance D1. Of course, this case is not limited to this.

Please refer to Figure 1 to Figure 3. In this example, the picture generating unit 10, the first mirror group 11, the second mirror group 12, the third mirror group 13 and the fourth mirror group 14 are all pivotally connected to the housing 2 through a micro motor, for example Body 2 rotates. In addition, the second mirror group 12 may include, for example, a concave mirror, and the first mirror group 11, the third mirror group 13, and the fourth mirror group 14 may include, for example, a plane mirror, but the case is not limited thereto. In this embodiment, the projection device 1 further includes a processor 20 and a distance detection module 30. The processor 20 is connected to the picture generating unit 10 to control the generation of the image projection light source. In addition, the processor 20 is further connected to the first mirror group 11, the second mirror group 12, the third mirror group 13 and the fourth mirror group 14, respectively, and controls the first mirror group 11, the second mirror group 12, the third The mirror rotation angle of the mirror group 13 and the fourth mirror group 14. The distance detection module 30 is connected to the processor 20 and configured to detect a physical target distance and transmit the physical target distance to the processor 20, wherein the processor 20 can further control the first mirror group 11 according to the physical target distance 2. The second mirror group 12, the third mirror group 13 and the fourth mirror group 14 are selectively rotated to a specific mirror rotation angle. In this embodiment, the distance detection module 30 may include, for example, an eye tracker (eye tracker, abbreviated as eye tracker) 31 and a distance detector 32. The eyeball tracker 31 is connected to the processor 20, and is configured to detect the position of a user's eyeball. The distance detector 32 is also connected to the processor 20, and is configured to detect the physical target distance according to the position at which the user's eyeball gazes measured by the eyeball longitudinal device 31. In this way, the projection device 1 of the present invention can selectively generate an optimized virtual image distance according to the physical target distance measured by the eye tracker 31 and the distance detector 32, for example, to achieve the virtual image and the physical of the projection device 1 The target image is focused on the same plane for imaging purposes. It should be emphasized that the distance detection module 30 applied to detect the distance of the physical target in this case is not limited to the combination of the aforementioned eye tracker 31 and the distance detector 32. In other embodiments, the distance detection module 30 may be, for example, a photographing device, an infrared distance detection device, or other distance detection devices, which is not limited in this case.

In this embodiment, the projection device 1 further includes a light source detector 40 connected to the processor 20, configured to detect the intensity of an external light source, and transmitted to the processor 20. The processor 20 can adjust the brightness of the image projection light source according to the external light intensity control and the physical target distance. For example, when the virtual image is generated at a shorter first virtual image distance D1, the brightness of the image projection light source can be lowered. The long second virtual image distance D2 can be used to increase the brightness of the image projection light source when generating the virtual image, so that the projection device 1 can perform imaging with the optimized brightness. In addition, the projection device 1 further includes a storage device 50 connected to the processor 20 and equipped to store a plurality of detection distances and a first mirror group 11, a second mirror group 12, and a third mirror corresponding to the plurality of detection distances, respectively A complex array of mirror rotation angle parameters of group 13 and fourth mirror group 14. In this way, the projection device 1 in this case further integrates the control parameters in advance and simplifies the process of optimizing the distance of the virtual image, which is beneficial to achieve the purpose of focusing and imaging the virtual image of the projection device 1 and the physical target image on the same plane.

It is worth noting that the projection device 1 in this case is controlled by a processor 20 such as a micro motor to drive the rotation of the first mirror group 11, the second mirror group 12, the third mirror group 13 and the fourth mirror group 14, and at least two types can be combined The above different virtual image distances are, for example, the first virtual image distance D1 and the second virtual image distance D2. Of course, the number and configuration of mirror groups can be adjusted according to actual application requirements. This case is not limited to this.

FIG. 4 is a block diagram showing the structure of a projection device according to the second preferred embodiment of this case. FIG. 5 is a schematic structural diagram showing the projection device of the second preferred embodiment of the present case when generating the first virtual image distance. FIG. 6 is a schematic diagram showing the structure of the projection device of the second preferred embodiment of this case when generating the second virtual image distance. FIG. 7 is a schematic structural diagram showing the projection device of the second preferred embodiment of the present invention when generating the third virtual image distance. In this embodiment, the projection device 1'is similar to the projection device 1 shown in FIGS. 1 to 3, and the same element numbers represent the same elements, structures, and functions, and are not repeated here. In this embodiment, the projection device 1'further includes a fifth mirror group 15 and a sixth mirror group 16, which are housed in the housing 2 and are pivotally disposed on the first side 2a and the second side 2b, respectively. The five mirror group 15 and the sixth mirror group 16 correspond to each other, and the fifth mirror group 15 corresponds to the first mirror group 11 and the sixth mirror group 16 corresponds to the third mirror group 14. In this embodiment, the picture generating unit 10, the third mirror group 13, the fifth mirror group 15 and the second mirror group 12 may be sequentially and equally spaced on the first side 2a of the housing 2, the first The mirror group 11, the sixth mirror group and the fourth mirror group 14 are also sequentially and equally spaced on the second side 2 b of the housing 2. In addition, the distance between the first side 2a and the second side 2b of the housing 2 is greater than the distance between the image generating unit 10, the third mirror group 13, the fifth mirror group 15, and the second mirror group 12 and greater than the first The distance between the mirror group 11, the sixth mirror group 16 and the fourth mirror group 14 is not limited to this case.

In this embodiment, the projection device can further generate at least three different virtual image distances. For example, when the first mirror group 11 is selectively rotated and reflects the image projection light source to the second mirror group 12 and is output through the outlet 2c, a virtual image is generated at a first virtual image distance D1, as shown in FIG. 5 . For another example, when the first mirror group 11 selectively rotates and reflects the image projection light source through the third mirror group 13 and the fourth mirror group 14 to the second mirror group 12 and outputs it through the exit end 2c, a second virtual image The distance D2 produces a virtual image, as shown in Figure 6. Or, for example, when the first mirror group 11 selectively rotates and reflects the image projection light source through the fifth mirror group 15, the sixth mirror group 16, the third mirror group 13 and the fourth mirror group 14 to the second mirror group 12 A third virtual image distance D3, as shown in Figure 7. In this embodiment, by adjusting the optical path length of the image projection light source, the second virtual image distance D2 can be, for example, twice the first virtual image distance D1, and the third virtual image distance D3 can be, for example, the first virtual image Three times the distance D1. In other words, the first virtual image distance D1, the second virtual image distance D2, and the third virtual image distance increase in multiples. Of course, this case is not limited to this.

In this embodiment, the picture generating unit 10, the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 all pass, for example, a The micro motor is pivotally connected to the housing 2 so that it can be controlled by the processor 20 to rotate relative to the housing 2. The second mirror group 12 may include a concave mirror, and the first mirror group 11, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 may include a plane mirror, respectively , But the case is not limited to this. Specifically, the virtual image distance that the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 can be combined should not be limited The first virtual image distance D1, the second virtual image distance D2, and the third virtual image distance D3. In this embodiment, the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 can be combined with a plurality of at least three groups Group mirror rotation angle. The processor 20 controls the rotation angles of the mirrors rotated by the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 to be more numerical, for example It is a two-digit value. For example, when a virtual image is generated at the first virtual image distance D1 in this embodiment, the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and The sixth mirror group 16 can be quantified into a group including (07, 35, 00, 00, 00, 00) values to represent the mirror rotation angle. In this embodiment, when a virtual image is generated at the second virtual image distance D2, the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group The 16 can be quantized into a set of values including (05, 26, 50, 04, 00, 00) to represent the mirror rotation angle. In this embodiment, when a virtual image is generated at the third virtual image distance D3, the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group The 16 can be quantized into a set of values including (03, 25, 30, 03, 30, 03) to represent the mirror rotation angle. Where 00 can represent, for example, that the mirror group does not reflect the image projection light source. Thereby, the rotation angles of the complex mirrors of the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 can be stored in the storage device Within 50, and the mirror rotation angle of each group can be matched with a suitable detection distance of the physical target image. On the other hand, the processor 20 adjusts the brightness of the image projection light source according to the external light intensity control and the physical target distance, which can also be digitized into two-digit values. For example, the brightness of the image projection light source can be reduced to a corresponding value of 01 when generating a virtual image with a shorter first virtual image distance D1, and the brightness of the image projection light source can be increased when generating a virtual image with a longer second virtual image distance D2. To the corresponding value 05, when the virtual image 3 is generated at the longer third virtual image distance D3, the brightness of the image projection light source can be increased to the corresponding value 07, so that the projection device 1'performs imaging with the optimized brightness. Thereby, the control parameters of each component of the projection device 1'can be stored in the storage device 50 together. Of course, this case is not limited to this.

According to the projection device 1'in the foregoing embodiment, a projection method is further disclosed in this case. FIG. 8 is a flowchart showing the projection method of the preferred embodiment of the present case. Please refer to Figure 4 to Figure 8. In order to achieve the purpose of focusing and imaging the virtual image of the projection device 1'and the physical target image on the same plane, the projection method in this case includes the following steps. First, the projection device 1'detects a physical target distance and an external light source intensity. Among them, the detection of the distance of the physical target can be completed by, for example, the distance detection module 32 including the eye tracker 31 and the distance detector 32. Wherein, the eyeball tracker 31 detects the position of the user's eyeball, as shown in step S1. The measured physical target distance may be temporarily stored in the processor 20, for example. Then, the distance detector 32 can detect and obtain a physical target distance according to the measured position of the user's eyeball, as shown in step S2. Of course, the detection method of the physical target distance is not limited to this, and any method that can measure the distance of a physical target can be applied to this case. On the other hand, the projection device 1'also detects the intensity of an external light source through the light source detector 40, as shown in step S3. Similarly, the measured intensity of the external light source can be sent to the processor 20 for temporary storage for subsequent use. Thereafter, the processor 20 of the projection device 1'can control the projection device 1'to select a virtual image distance from the plurality of virtual image distances according to the physical target distance, as shown in step S4. In this embodiment, for example, a virtual image can be generated from the first virtual image distance D1, the second virtual image distance D2, and the third virtual image distance D3 configured in the projection device 1', so as to achieve the virtual image and The purpose of focusing and imaging the solid target image on the same plane. It is worth noting that the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 can be equipped with a complex array of mirror rotation angles The parameters are combined and stored in the storage device 50. Each group of mirror rotation angles can generate a virtual image distance, for example. Therefore, the storage device 50 may pre-store a plurality of mirror rotation angles of the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 Parameters and their corresponding applicable detection distances. After the processor 20 obtains the physical target distance, it can read a plurality of pre-stored detection distances and the first mirror group 11, the second mirror group 12, and the third corresponding to the plurality of detection distances from the storage device 50, for example. The rotation angle of the complex mirror group of the mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16. At the same time, the measured physical target distance is compared with a plurality of pre-stored detection distances, and the most suitable one is selected from the plurality of detection distances. At this time, the processor 20 controls the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 according to the selected detection distance The corresponding mirror rotation angle is used to generate a virtual image at the optimized virtual image distance. For example, one of the first virtual image distance D1, the second virtual image distance D2, and the third virtual image distance D3. In this way, the projection device 1'in this case further simplifies the process of optimizing the distance of the virtual image, which is beneficial to achieve the purpose of focusing and imaging the virtual image of the projection device 1'and the physical target image on the same plane.

On the other hand, in step S5, the processor 20 further controls the adjustment of the image generating unit 10 according to the intensity of the external light source measured by the light source detector 40 and the physical target distance measured by the distance detection module 30 The brightness of the projected image projection light source to achieve the best imaging effect. For example, when a short physical target distance, a short first virtual image distance D1 is used to generate a virtual image, or the external environment measures a relatively dark external light source intensity, the processor 20 can reduce the emission of the image generating unit 10 The brightness of the image projection light source meets the needs. On the contrary, for example, when a virtual image is generated at a longer physical target distance, matched with a longer third virtual image distance D3, or a relatively bright external light source intensity is measured in the external environment, the processor 20 can increase the image generation unit 10 The brightness of the projected image projection light source to meet the needs. Thereby, the control parameters of each component of the projection device 1'are integrated and simplified. Of course, this case is not limited to this.

Finally, as shown in step S6, the processor 20 of the projection device 1'can project a virtual image according to the selected virtual image distance and the brightness of the image projection light source, so that the virtual image of the projection device 1'and the physical target image are the same Plane focused imaging. It should be emphasized that the projection device 1 ′ in this case can rotate the first mirror group 11, the second mirror group 12, the third mirror group 13, the fourth mirror group 14, the fifth mirror group 15 and the sixth mirror group 16 by rotating The mirror rotation angle can generate at least two or more virtual image distances, for example, the first virtual image distance D1, the second virtual image distance D2, and the third virtual image distance D3 that increase in multiples to form an adjustable virtual image The distance projection device 1'is available for users to choose. Of course, the number of mirror sets and the number of virtual image distances that can be combined can be adjusted according to the actual application requirements. This case is not limited to this. In addition, the projection device 1 ′ which can adjust the virtual image distance in this case further cooperates with the measured physical target distance detected by the distance detection module 30 and the external light source intensity measured by the light source detector 40 to control the adjustment The brightness of the image projection light source emitted by the picture generating unit 10 is beneficial to achieve the purpose of focusing and imaging the virtual image projected by the projection device 1'and the physical target image on the same plane.

It is worth noting that, in this embodiment, the projection device 1'detects the position of the user's eyeball through the eye tracker 31, which is more conducive to achieving the fusion display of the virtual image and the physical target image. FIG. 9 shows the implementation of the first virtual image generated by the projection device of the present invention at the first virtual image distance. FIG. 10 shows the implementation of the projection device for generating the second virtual image at the second virtual image distance. FIG. 11 shows the implementation of the projection device generating the third virtual image at the third virtual image distance. Please refer to Figure 5 to Figure 11. In this embodiment, when the eye tracker 31 detects the first position T1 that the user's eye is watching, such as the bus stop shown in Figure 9, and the shorter first physical target distance D1' is measured The picture generating unit 10 of the projection device 1'can generate a first virtual image P1 at the first virtual image distance D1. Preferably, the first physical object distance D1' is equal to the first virtual image distance D1, but it is not limited thereto. When the eye tracker 31 detects the second position T2 that the user's eye is looking at, such as the on-off bus shown in FIG. 10, and a longer second physical target distance D2' is measured, the picture of the projection device 1' The generating unit 10 can generate a second virtual image P2 at the second virtual image distance D2. Preferably, the second physical target distance D2' is equal to the second virtual image distance D2, but it is not limited thereto. Moreover, when the eye tracker 31 detects the third position T3 that the user's eye is looking at, such as moving away from the bus as shown in FIG. 11 and a longer third physical target distance D3' is measured, the projection device 1 The picture generating unit 10 can generate a third virtual image P3 at the third virtual image distance D3. Preferably, the third physical object distance D3' is equal to the third virtual image distance D3, but it is not limited thereto. It should be emphasized that the projection device 1 in this case can cooperate with the measured physical target distance detected by the distance detection module 30 to generate a virtual image at a corresponding virtual image distance. Of course, as described above, the projection device 1'can further cooperate with the measured physical target distance detected by the distance detection module 30 and the external light source intensity measured by the light source detector 40 to control and adjust the image generation The brightness of the image projection light source emitted by the unit 10 is beneficial to achieve the purpose of focusing and imaging the virtual image projected by the projection device 1'and the physical target image in the same plane, which will not be repeated here.

In summary, this case provides a projection device and method for adjusting the distance of a virtual image. By adding a plurality of selectively rotatable mirror groups between the optical machine such as the picture generating unit and the exit end of the projection device, at least two or more different virtual image distances can be generated in combination to achieve an adjustable virtual image The distance of the projection device is further adjusted to optimize the virtual image distance according to the actual application requirements of the user, so as to achieve the purpose of focusing and imaging the virtual image of the projection device and the physical target image on the same plane. In addition, the projection device can control the selective rotation of the complex array lens group according to the physical target distance of the actual image observed by the user, so that the projection image device can generate an optimized virtual image distance, which is more conducive to achieving the virtual image of the projection device and the physical target image. The purpose of focusing imaging in the same plane.

This case may be modified by any person familiar with the technology as a craftsman, but it is not as easy as the protection of the patent application.

1. 1': projection device 2: housing 2a: first side 2b: second side 2c: open end 10: picture generating unit 11: first mirror group 12: second mirror group 13: third mirror group 14: Fourth mirror group 15: Fifth mirror group 16: Sixth mirror group 20: Processor 30: Distance detection module 31: Eye tracker 32: Distance detector 40: Light source detector 50: Storage device D1: First virtual image distance D2: Second virtual image distance D3: Third virtual image distance D1': First physical object distance D2': Second physical object distance D3': Third physical object distance P1: First virtual image P2 : Second virtual image P3: Third virtual image S1~S6: Step T1: First position T2: Second position T3: Third position

FIG. 1 is a block diagram showing the structure of the projection device of the first preferred embodiment of the present case.

FIG. 2 is a schematic diagram showing the structure of the projection device according to the first preferred embodiment of this case when generating the first virtual image distance.

FIG. 3 is a schematic structural diagram showing the projection device of the first preferred embodiment of the present case when generating the second virtual image distance.

FIG. 4 is a block diagram showing the structure of a projection device according to the second preferred embodiment of this case.

FIG. 5 is a schematic structural diagram showing the projection device of the second preferred embodiment of the present case when generating the first virtual image distance.

FIG. 6 is a schematic diagram showing the structure of the projection device of the second preferred embodiment of this case when generating the second virtual image distance.

FIG. 7 is a schematic structural diagram showing the projection device of the second preferred embodiment of the present invention when generating the third virtual image distance.

FIG. 8 is a flowchart showing the projection method of the preferred embodiment of the present case.

FIG. 9 shows the implementation of the first virtual image generated by the projection device of the present invention at the first virtual image distance.

FIG. 10 shows the implementation of the projection device for generating the second virtual image at the second virtual image distance.

FIG. 11 shows the implementation of the projection device generating the third virtual image at the third virtual image distance.

1: projection device

2: shell

2a: first side

2b: second side

2c: open end

10: Picture generation unit

11: First Mirror Group

12: The second mirror group

13: The third mirror group

14: The fourth mirror group

D1: First virtual image distance

Claims (13)

A projection device includes: a housing having a first side, a second side and an open end, wherein the first side and the second side are opposite to each other; a picture generating unit is accommodated in the housing, Adjacent to the first side, and equipped to provide an image projection light source; a first mirror group, accommodated in the housing, pivotally arranged on the second side, and corresponding to the picture generating unit, the assembly reflects the An image projection light source; a second mirror group, accommodated in the housing, pivotally arranged on the first side, adjacent to the open end, and corresponding to the first mirror group; and a third mirror group and a fourth The mirror group is accommodated in the housing and is respectively pivotally arranged on the first side and the second side, the third mirror group and the fourth mirror group correspond to each other, and the third mirror group corresponds to the first Mirror group, the fourth mirror group corresponds to the second mirror group; wherein when the first mirror group selectively rotates and reflects the image projection light source to the second mirror group and outputs through the exit end, a first mirror group The virtual image distance generates a first virtual image, and selectively rotates on the first mirror group and reflects the image projection light source through the third mirror group and the fourth mirror group to the second mirror group and passes through the exit When outputting from the terminal, a second virtual image is generated at a second virtual image distance. The projection device as described in item 1 of the patent application scope further includes: a fifth mirror group and a sixth mirror group, which are accommodated in the housing and are respectively pivotally arranged on the first side and the second side, The fifth mirror group and the sixth mirror group correspond to each other, and the fifth mirror group corresponds to the first mirror group, and the sixth mirror group corresponds to the third mirror group; wherein the first mirror group is selectively rotated And when the image projection light source reflects through the fifth mirror group, the sixth mirror group, the third mirror group and the fourth mirror group to the second mirror group, a third is generated at a third virtual image distance Virtual image. The projection device as described in item 2 of the patent application scope further includes: a processor connected to the picture generating unit and the first lens group, and configured to control the generation of the image projection light source and the first lens group Rotation; and a distance detection module, connected to the processor, configured to detect a physical target distance and transmit the physical target distance to the processor, wherein the processor controls the first A group of mirrors rotates selectively. The projection device as described in item 3 of the patent application scope, wherein the distance detection module includes: an eye tracker connected to the processor, configured to detect the position of a user's eyeball; and a distance detection The detector is connected to the processor, and is configured to detect the physical target distance according to the position of the user's eyeball. The projection device as described in item 3 of the patent application scope further includes a light source detector connected to the processor, configured to detect the intensity of an external light source, and transmitted to the processor, wherein the processor is based on the external The light source intensity and the physical target distance control adjust the brightness of the image projection light source. The projection device as described in item 3 of the patent application scope further includes a storage device connected to the processor, which is equipped to store a plurality of detection distances and the first mirror group and the corresponding one corresponding to the plurality of detection distances, respectively The complex mirror rotation angle parameters of the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group. The projection device as described in item 2 of the patent application scope, wherein the second mirror group includes a concave mirror, the first mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth Each mirror group includes a plane mirror. A projection method of a projection device, the projection device can adjust a plurality of virtual image distances and the brightness of an image projection light source, the projection method includes the steps of: (a) detecting a physical target distance and an external light source intensity; (b) according to The physical target distance, the projection device selects a virtual image distance from the plurality of virtual image distances; (c) controls and adjusts the brightness of the image projection light source according to the intensity of the external light source and the physical target distance; and (d) based on The selected virtual image distance and the brightness of the image projection light source project a virtual image. The projection method as described in item 8 of the patent application scope, wherein the step (a) further includes the steps of: (a1) detecting a position where a user's eyeball is looking at; and (a2) according to a position where the user's eyeball is looking at To detect the target distance of the entity. The projection method as described in item 8 of the patent application range, wherein the plurality of virtual image distances include a first virtual image distance and a second virtual image distance, and the projection device includes: a housing having a first side And a second side surface, wherein the first side surface and the second side surface are opposite to each other; a picture generating unit is housed in the housing, adjacent to the first side surface, and configured to provide the image projection light source; a first A mirror group is accommodated in the housing, is pivotally arranged on the second side, and corresponds to the picture generating unit, and is configured to reflect the image projection light source; a second mirror group is accommodated in the housing and is pivotally connected It is disposed on the second side and corresponds to the first mirror group; and a third mirror group and a fourth mirror group are accommodated in the housing and are respectively pivotally arranged on the first side and the second side, The third mirror group and the fourth mirror group correspond to each other, and the third mirror group corresponds to the first mirror group, and the fourth mirror group corresponds to the second mirror group; wherein the first mirror group is selectively rotated And when the image projection light source is reflected to the second mirror group, a first virtual image is generated at the distance of the first virtual image, and the first mirror group is selectively rotated and the image projection light source passes through the third mirror When the group and the fourth mirror group reflect to the second mirror group, a second virtual image is generated at the distance of the second virtual image. The projection method as described in item 10 of the patent application range, wherein the plurality of virtual image distances further includes a third virtual image distance, and the projection device includes: a fifth mirror group and a sixth mirror group, which are placed in The housing is respectively pivotally arranged on the first side and the second side, the fifth mirror group and the sixth mirror group correspond to each other, and the fifth mirror group corresponds to the first mirror group, the sixth The mirror group corresponds to the third mirror group; wherein the first mirror group is selectively rotated and the image projection light source is reflected through the fifth mirror group, the sixth mirror group, the third mirror group and the fourth mirror group Upon reaching the second mirror group, a third virtual image is generated at the distance of the third virtual image. The projection method as described in item 11 of the patent application range, wherein the projection device further includes a storage device and a processor, the storage device is connected to the processor, and is configured to store a plurality of detection distances and respectively correspond to the plurality When the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group are complex array mirror rotation angle parameters, wherein the step (b ) Includes the steps of: (b1) reading the plurality of detection distances and the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the The angle of rotation of the complex array of mirror surfaces of the fifth mirror group and the sixth mirror group; and (b2) comparing the physical target distance with the plurality of detection distances, selecting one of the plurality of detection distances, and according to The rotation angle of the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group corresponding to the selected detection distance Selectively rotate the first mirror group, the second mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth mirror group to generate the first virtual image distance, the One of the second virtual image distance and the third virtual image distance. The projection method as described in item 11 of the patent application scope, wherein the second mirror group includes a concave mirror, the first mirror group, the third mirror group, the fourth mirror group, the fifth mirror group and the sixth Each mirror group includes a plane mirror.

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