JP2022044395A - Projector device - Google Patents

Abstract

To prevent inconvenience that light reflected on a housing is reflected on a projection surface, thereby maintaining image quality.SOLUTION: A projector device has: a housing 2 that is irradiated with external light; a projection unit 4 that is provided on the housing 2 and projects an image on a projection surface S; and a reflection unit that is provided on the housing 2 and reflects the external light with which the housing 2 is irradiated to the outside of the projection surface. As the reflection unit, a surface part 3 provided on the housing 2 inclined opposite to a projection side to reflect the external light with which the housing 2 is irradiated to the outside of the projection surface, or a light shielding wall reflecting the external light with which the housing 2 is irradiated to the outside of the projection surface can be used. This makes it possible to prevent inconvenience that light reflected on the housing 2 is reflected on the projection surface S, thereby maintaining image quality.SELECTED DRAWING: Figure 4

Description

The present invention relates to a projector device.

Today, a projector device that forms an optical image and projects it on a screen or the like is known. For example, in Patent Document 1 (Japanese Unexamined Patent Publication No. 2009-273552), a projected image and a user are combined by using a projection type image display device aimed at shortening the distance between the projection type image display device and the projection surface. A projection type image display device that realizes a new utilization method is disclosed. This projection type image display device is formed by accommodating a projection optical system provided with a reflection mirror and an image light generation unit in a housing. The image light generation unit includes an image control unit, and the image control unit controls an image displayed on the projection surface based on basic information including user information.

However, in the conventional projector device, when the distance between the housing of the projector device for projection and the projection surface (screen) becomes short, the indoor illumination light is reflected on the upper surface of the housing of the projector device and the projected image is projected. There was a problem that the image quality of the projected image was deteriorated due to the reflection on the image. Such a problem becomes more remarkable in the case of a short focus projector device capable of forming a short-distance image.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a projector device capable of maintaining image quality by preventing the inconvenience of external light reflected by a housing being reflected on a projection surface. do.

In order to solve the above-mentioned problems and achieve the object, the present invention is provided in a housing irradiated with external light, a projection unit provided in the housing and projecting an image on a projection surface, and a housing. It has a reflecting portion that reflects the external light radiated to the housing to the outside of the projection surface.

According to the present invention, there is an effect that the inconvenience that the external light reflected on the housing is reflected on the projection surface can be prevented and the image quality can be maintained.

FIG. 1 is a diagram for explaining that even if the room lighting is reflected on the housing by installing it at a position away from the screen, the reflected light has little influence on the projected image. FIG. 2 is a diagram for explaining the inconvenience that the room lighting is reflected on the surface portion of the upper surface of the short focus projector device and reflected in the projected image in the short focus projector device in which the outlet of the projected light is on the upper surface. FIG. 3 is a diagram for explaining the inconvenience that the room lighting is reflected on the surface portion of the upper surface of the short focus projector device and reflected in the projected image in the short focus projector device in which the exit of the projected light is on the front surface. FIG. 4 is a perspective view of the short focus projector device of the first embodiment. FIG. 5 is a diagram for explaining the function of the short focus projector device according to the first embodiment. FIG. 6 is a perspective view of the short focus projector device of the second embodiment. FIG. 7 is a perspective view of the short focus projector device according to the third embodiment. FIG. 8 is a diagram for explaining the function of the short focus projector device according to the third embodiment.

Hereinafter, the projector device according to the embodiment will be described with reference to the attached drawings.

[Comparison example]
FIG. 1 shows a usage state of a projector device as a comparative example. FIG. 1 shows a state in which a projector device P having a projected light outlet on the front surface is installed at a position away from the screen S and projected. In this case, the illumination light from the indoor illumination L is reflected by the surface portion PU which is the upper surface of the projector device P. However, since the projector device P is installed at a position away from the screen S, even if the illumination light from the indoor lighting L is reflected by the surface PU that is the upper surface of the projector device P, the reflected light that reaches the screen S is still present. Since the intensity is low and the intensity is weak, the effect on the projected image is small. Therefore, in this case, the reflected light of the illumination light from the indoor illumination L does not pose a problem.

On the other hand, FIG. 2 shows the usage state of the short focus projector device, which has the outlet of the projected light on the upper surface and enables image formation at a short distance. In this case, projection is performed on the screen S from the projection port provided on the surface portion PU which is the upper surface of the short focus projector device. Since the short focus projector device is mounted at a position close to the screen S, the illumination light from the indoor illumination L is reflected by the surface PU on the upper surface, and this reflected light is shown by the diagonal line in FIG. It is reflected on the screen S.

Similarly, FIG. 3 shows the usage state of the short focus projector device in which the outlet of the projected light is provided on the front surface. Also in this case, since the short focus projector device is mounted at a position close to the screen S, the illumination light from the indoor illumination L is reflected by the surface PU on the upper surface, and this reflected light is reflected in FIG. It is reflected on the screen S as shown by the diagonal line.

If the reflected light of the illumination light of the room illumination L is reflected on the screen S, the image quality of the projected image may deteriorate. Therefore, the projector device of the embodiment has a function of preventing the reflected light from entering the screen, as described below.

[First Embodiment]
FIG. 4 is a perspective view of the projector device 1 according to the first embodiment. FIG. 4 shows a state in which the projector device 1 having the outlet of the projected light on the upper surface is placed in the vicinity of the screen S for projection. The screen S is an example of a projection surface. Further, a short-focus projection unit that enables image formation at a short distance is provided in the housing 2. Therefore, although it is an example, the projector device 1 is a short focus projector device capable of forming an image at a short distance.

The projector device 1 includes a projection port 4 and an operation unit 5 on a surface portion 3 (an example of a reflection portion) which is an upper surface. Further, in the projector device 1, the surface portion 3 is provided so as to be inclined toward the anti-screen S side. In other words, the surface portion 3 is provided on the housing 2 so as to be inclined in a direction opposite to the projection direction. In other words, the surface portion 3 has a predetermined inclination angle by lowering the height position of the longitudinal end portion on the projection direction side of the surface portion 3 than the height position of the longitudinal end portion on the anti-projection direction side. It is formed like this. The inclination angle of the surface portion 3 is an inclination angle such as 30 degrees to 45 degrees, which reduces the reflected light reflected by the surface portion 3 that enters the screen S. That is, the surface portion 3 is a surface portion irradiated with external light such as illumination light in the housing 2, and is provided on the housing 2 so as to be inclined to the side opposite to the projection surface. In the following, the external light will be described as an illumination light as an example.

FIG. 5 is a diagram for explaining a function of reducing reflected light of the projector device according to the first embodiment. Of these, FIG. 5A shows the projection state of the projector device P in which the surface portion to be the upper surface is not inclined. Further, FIG. 5B shows the projection state of the projector device of the first embodiment in which the surface portion to be the upper surface is inclined. As shown in FIG. 5A, when the surface portion to be the upper surface is not provided with an inclination, a large amount of reflected light of the illumination light enters the screen S, which causes a factor of deteriorating the image quality of the projected image.

On the other hand, by providing the surface portion 3 with an inclination in the anti-screen S direction, as shown by the arrows in FIGS. 4 and 5 (b), the illumination light from the indoor illumination L reflected by the surface portion 3 on the upper surface is reflected. Most of the reflected light can be reflected in a direction other than the direction of the screen S. Therefore, the reflected light of the illumination light from the indoor lighting L, which enters the screen S on which the projected image is projected, can be significantly reduced, and the image quality of the projected image can be maintained.

In this example, the surface portion 3 which is the upper surface where the projection light outlet is provided is inclined, but the surface portion where the projection light outlet is provided on the front surface of the projector device is provided with an inclination. May also be tilted. Thereby, in both cases where the outlet of the projected light is provided on the upper surface and the outlet of the projected light is provided on the front surface, the incoming light of the reflected light to the screen S can be reduced.

(First modification)
The projector device of the first embodiment as described above can obtain a further effect of reducing reflected light by doing the following. That is, the surface portion that becomes the upper surface when the outlet of the projected light is provided on the upper surface, the surface portion that becomes the upper surface when the outlet of the projected light is provided on the front surface, or the entire housing 2 has low reflection. Formed from members. Alternatively, with respect to the surface portion that becomes the upper surface when the outlet of the projected light is provided on the upper surface, the surface portion that becomes the upper surface when the outlet of the projected light is provided on the front surface, or the entire housing 2. Apply low-reflection paint. As a result, the reflected light can be reduced by the low-reflection member, and the reflected light can be reflected in a direction other than the direction of the screen S due to the inclination of the surface portion to be the upper surface described above. It can be significantly reduced.

(Second modification)
Inclined angle adjustment for forming the above-mentioned tilt angle on the surface portion that becomes the upper surface when the outlet of the projected light is provided on the upper surface and the surface portion that becomes the upper surface when the outlet of the projected light is provided on the front surface. The mechanism is provided in the housing 2. In this case, the housing 2 is formed by an upper half portion having a surface portion to be an upper surface and a lower half portion having a mounting surface (the housing 2 may be divided into three or more). Further, an inclination angle adjusting mechanism for adjusting the inclination angle of the upper half portion is provided with respect to the lower half portion. Then, the tilt angle adjusting mechanism adjusts the tilt angle of the upper half portion to the tilt angle at which the incoming light of the reflected light to the screen S is reduced. The tilt angle may be adjusted manually or automatically by a motor.

As a result, the tilt angle of the surface portion to be the upper surface can be adjusted to the tilt angle at which the reflected light entering the screen S is minimized, the reflected light entering the screen S is reduced, and the image quality of the projected image is maintained. can.

[Second Embodiment]
Next, the projector device of the second embodiment will be described. FIG. 6 is a perspective view of the projector device of the second embodiment. The projector device 11 of the second embodiment is an example in which the surface portion 13 which becomes the upper surface when mounted is not provided with an inclination, and a light-shielding wall 16 is provided instead. In this example, in the projector device 11, the light-shielding wall 16 is provided on the surface portion 13 which is the upper surface where the projection light outlet is provided, but the projector device in which the projection light outlet is provided on the front surface. A light-shielding wall 16 may be provided on the surface portion to be the upper surface of the above.

The light-shielding wall 16 (an example of a reflective portion) is formed by bending a long plate member into a substantially "U" shape. Further, the light-shielding wall 16 is provided in the housing 2 so as to be located on the opposite side (anti-projection side = anti-screen S side) to the side on which the projected image is projected through the projection port 14. The light-shielding wall 16 may be formed of a low-reflection member or may be coated with a low-reflection paint.

As an example, the light-shielding wall 16 is a manual pull-out type light-shielding wall. The light-shielding wall 16 is housed in the housing 12 when the projector device 11 is not in use. The light-shielding wall 16 is provided with a knob portion, and when the projector device 11 is used, the knob portion is picked up by a finger and pulled up to be pulled out from the inside of the housing 12. When it is pulled out more than a predetermined value, the stopper functions and the light-shielding wall 16 stops while maintaining a predetermined height position as shown in FIG.

Further, when the projector device 11 is not in use, the stopper is released by applying a force in the direction opposite to the pulling direction (force in the housing 12 direction) to the light-shielding wall 16 being pulled out. The light-shielding wall 16 is housed in the housing 12.

By providing such a light-shielding wall 16, the projector device of the second embodiment can reflect the illumination light to the anti-screen side and reduce the illumination light entering the surface portion 13 which is the upper surface. That is, the light-shielding wall 16 reflects the illumination light to the outside of the screen. Therefore, the reflected light of the illumination light reflected from the surface portion 13 on the upper surface to the screen can be reduced, and the image quality of the projected image can be maintained. Further, by forming the light-shielding wall 16 and the housing 12 with a low-reflection member or applying a low-reflection paint, such a reduction effect of reflected light can be made more remarkable.

In this example, the light-shielding wall 16 is a manual pull-out type light-shielding wall, but it may be a light-shielding wall that can be automatically stored and projected by a motor, a gear, or the like.

(Variation example)
A light-shielding wall that covers about half or the entire surface portion 13 that is the upper surface when pulled out from the housing 12 may be provided. As an example, a plurality of light-shielding wall pieces are connected in a stretchable manner to form a light-shielding wall 16, each light-shielding wall piece is stored in a housing 12 at the time of reduction, and each light-shielding wall piece is extended at the time of extension to form a surface portion 13. May be covered in a dome shape, for example. By covering the surface portion 13 with the light-shielding wall 16, it becomes difficult to operate the operation portion 15 provided on the surface portion 13, but in this case, the operation by the remote controller device causes an obstacle to the operation. There is nothing to do.

By covering the surface portion 13 which is the upper surface with the light-shielding wall 16 in this way, the reflected light entering the screen S can be further reduced. By forming each light-shielding wall piece with a low-reflection member or applying a low-reflection paint, such a reduction effect of reflected light can be made more remarkable.

[Third Embodiment]
Next, the projector device of the third embodiment will be described. FIG. 7 is a perspective view of the projector device 21 according to the third embodiment. As shown in FIG. 7, in the projector device 21 of the third embodiment, the surface portion 25 which becomes the upper surface when mounted is provided with an inclination angle inclined to the anti-projection side, and the anti-projection side of the surface portion 25 is provided. This is an example in which a light-shielding wall 26 is provided on the surface.

The inclination angle of the surface portion 25 is an inclination angle that reduces the reflected light reflected by the surface portion 25 that enters the screen S as described above.

Further, the light-shielding wall 26 is formed by bending a long plate member into a substantially "U" shape. Further, the light-shielding wall 16 is provided on the housing 22 so as to be located on the opposite side (anti-projection side = anti-screen S side) to the side on which the projected image is projected through the projection port. The light-shielding wall 26 may be formed of a low-reflection member or may be coated with a low-reflection paint.

The light-shielding wall 26 is a manual pull-out type light-shielding wall as described above. The light-shielding wall 26 is housed in the housing 22 when the projector device 21 is not in use, and is pulled out from the housing 22 when in use.

In the case of the projector device 21 of the third embodiment, as shown in FIG. 8, the illumination light is reflected by the light-shielding wall 26, and the illumination light entering the surface portion 25 on the upper surface can be reduced. Further, the illumination light that enters the surface portion 25 that is the upper surface is reflected by the inclined surface portion 25 toward the anti-screen S side. Due to the functions of the light-shielding wall 26 and the inclined surface portion 25, the reflected light of the illumination light entering the screen S can be significantly reduced. Therefore, the image quality of the projected image can be maintained.

Also in this third embodiment, the light-shielding wall 26 and the housing 22 may be formed of a low-reflection member or may be coated with a low-reflection paint. Further, the light-shielding wall 26 may be manually or automatically retractable and projectable. Further, the surface portion 25 may be covered with the light-shielding wall 26. In either case, the reflected light can be further reduced.

Finally, each of the above embodiments is presented as an example and is not intended to limit the scope of the invention. Each of the novel embodiments can be implemented in various other embodiments, and various changes, omissions, and replacements can be made without departing from the gist of the invention. Further, each embodiment and modified examples of each embodiment are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

1 Projector device 2 Projector device housing 3 Top surface surface 4 Projection port 5 Operation unit 11 Projector device 12 Projector device housing 13 Top surface surface 14 Projection port 15 Operation unit 16 Shading wall 21 Projector device 22 Projector device Housing 25 Top surface 26 Light-shielding wall L Interior lighting S screen

Japanese Unexamined Patent Publication No. 2009-273552

Claims (6)

The housing that is exposed to outside light and
A projection unit provided in the housing and projecting an image on a projection surface,
A reflecting portion provided in the housing and reflecting the external light radiated to the housing to the outside of the projection surface.
Projector device with. The projector device according to claim 1, wherein the reflecting portion tilts a surface portion of the housing to which the external light is irradiated so as to be opposite to the projection surface. The projector device according to claim 1 or 2, wherein the reflecting portion is a light-shielding wall that reflects external light radiated to the housing to the outside of the projection surface. The third aspect of the present invention is characterized in that the light-shielding wall is housed in the housing when the projection unit is not projected, and is pulled out from the housing and set at a predetermined height position when the projection unit is projected. The projector device described. The projector device according to any one of claims 1 to 4, wherein the reflecting portion is formed of a reflection reducing member or is coated with a reflection reducing paint. The projector device according to any one of claims 1 to 5, wherein the projection unit is a projection unit having a short focus.

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