WO2020017704A1

WO2020017704A1 - Projection device and projection device operation method

Info

Publication number: WO2020017704A1
Application number: PCT/KR2018/013986
Authority: WO
Inventors: 오진택; 홍승기; 석창준; 남세영
Original assignee: 주식회사 세코닉스
Priority date: 2018-07-18
Filing date: 2018-11-15
Publication date: 2020-01-23
Also published as: KR20200009352A

Abstract

A projection device and a projection device operation method are disclosed. The projection device can comprise: a lighting optical system for emitting, at a digital micromirror device (DMD) element, light generated from a light source; and a projection optical system which is arranged so as to form a set angle with the lighting optical system, and which receives, from the DMD element, image light from which the light has been reflected, and projects same.

Description

Projector and Method of Operation

It is associated with the projection apparatus, and more particularly with respect to the optical system structure of the projection apparatus.

The background technology of the present invention is disclosed in the following documents.

1) Registration No. 10-0813988, "Lighting device and image projection device using the same".

2) Registration No .: 10-0813983, "Lighting system, illumination unit and image projection apparatus employing the same"

The projection apparatus may include an illumination optical system and a projection optical system, and specifically, the light generated from the light source may be transmitted to the projection optical system through the illumination optical system, the reflective member, the DMD element, and the prism.

Such a projection device is required to reduce the physical size in terms of application in various fields.

However, in the conventional projection apparatus, as shown in FIG. 1, since the illumination optical system and the projection optical system are arranged in parallel, the horizontal and vertical sizes of the respective optical systems must be secured, thereby limiting the physical size. .

Projection apparatus is presented. The projection apparatus according to the embodiment is disposed such that the illumination optical system and the projection optical system have a set angle, thereby reducing the physical size of the projection apparatus including the illumination optical system and the projection optical system.

According to one side, the projection apparatus is an illumination optical system for irradiating the light generated from the light source to a DMD (Digital Micromirror Device) element, and arranged to form a set angle with the illumination optical system, the image light reflected from the DMD element It may include a projection optical system for receiving and projecting.

A method of operating a projection device includes irradiating light generated from a light source to a DMD element in an illumination optical system, and projecting image light reflected from the DMD element in a projection optical system arranged to form a predetermined angle with the illumination optical system. Receiving and projecting.

1 is a view showing the configuration of a conventional projection apparatus.

2 is a view showing the configuration of a projection apparatus according to an embodiment of the present invention.

3 is a view for explaining the law of reflection applied in the projection apparatus according to an embodiment of the present invention.

4 is a diagram illustrating an example of determining an irradiation angle of light transmitted to a DMD element according to a driving characteristic of the DMD element in the projection apparatus according to the exemplary embodiment of the present invention.

5 is a view showing an example of the configuration of a projection apparatus according to an embodiment of the present invention.

6 is a view showing the physical size of the projection apparatus according to an embodiment of the present invention compared with the conventional projection apparatus.

7 is a view showing an example of the light source arrangement in the projection apparatus according to an embodiment of the present invention.

8 is a diagram illustrating an example of a reflective member in a projection apparatus according to an embodiment of the present invention.

9 is a diagram illustrating a direction of light incident on a DMD element according to driving characteristics of the DMD element in the projection apparatus according to the exemplary embodiment of the present invention.

10 is a flowchart illustrating a method of operating a projection apparatus according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments.

2, the projection apparatus 200 according to an embodiment of the present invention includes an illumination optical system 210, a reflecting member 220, a DMD element 230, a prism 240, a projection optical system 250, and a controller. 260 may include.

The illumination optical system 210 may include a light source (eg, an LED), and may radiate the light generated by the light source to the digital micromirror device (DMD) device 230 through the reflective member 220.

The reflective member 220 may reflect the light received from the illumination optical system 210 and transmit the reflected light to the DMD element 230. In this case, the reflective member 220 may be configured in any one of a planar shape, a concave shape, and a convex shape having a different size of the transmission area for the light and a distribution degree for the light. When the reflective member 220 is configured in a concave shape, the light may be increased by radiating light of a narrower area to the DMD element 230 than in the planar shape, and in the case of the convex shape, a wider area than in the planar shape By irradiating the light on the DMD element 230, there is an increasing effect on the uniformity to distribute the light evenly.

The DMD element 230 may transmit the light received from the reflective member 220 to the prism 240.

The prism 204 may receive the image light reflected from the DMD element 230 vertically, change the path to the image light, and transmit the image light to the projection optical system 250.

The projection optical system 250 may be disposed to form a predetermined angle with the illumination optical system 210, and may receive and project image light reflected from the DMD element 230. As the illumination optical system 210 and the projection optical system 250 are arranged to have a set angle, the projection apparatus 200 including the illumination optical system 210 and the projection optical system 250 may be reduced in physical size.

The controller 260 determines an irradiation angle of light transmitted to the DMD element 230 based on a driving characteristic of the DMD element 230, and according to the determined irradiation angle, inclination of the reflective member 220 is determined. You can change it. At this time, the controller 260 is based on the condition that the image light reflected from the DMD element 230 is to be incident perpendicularly to the prism 240 and the law of reflection shown in FIG. 3 (that is, normal to the reflection plane). The irradiation angle of the light transmitted to the DMD element 230 may be determined based on the incident angle of the incident ray and the reflection angle of the reflected ray.

For example, as shown in FIG. 4, the controller 260 normalizes an angle at which light is irradiated onto the DMD element 230 when the driving characteristic of the DMD element 230 is 'reflection plane driving angle 12 degrees'. It can be decided as '24 degrees' for the vertical direction of output. In addition, when the driving characteristic of the DMD element 230 is' the reflection surface driving angle of 17 degrees', the controller 260 may set the angle at which light is irradiated to the DMD element 230 to '34 degrees' in the normal direction. Can be determined.

In addition, the controller 260 checks the physical size occupied by the projection apparatus 250 as the angle is changed differently by rotating the illumination optical system 210 at an arrangement position not parallel to the projection optical system 250. By resetting the illumination optical system 210 and the projection optical system 250 by setting an angle at the smallest size among the identified physical sizes, the physical size of the projection apparatus 200 may be minimized.

At this time, the controller 260 adjusts the inclination of the reflecting member 220 according to the degree of rotation of the illumination optical system 210 to reposition with the projection optical system 250 to irradiate the light transmitted to the DMD element 230. Make the angle constant.

Referring to FIG. 5, the projection apparatus 500 may include an illumination optical system 510, a reflective member 520, a DMD element 530, a prism 540, and a projection optical system 550.

The projection apparatus 500 may transmit the light generated from the light source to the projection optical system 550 through the illumination optical system 510, the reflective member 520, the DMD element 530, and the prism 540.

At this time, the projection apparatus 500 may include an illumination optical system 510 and a projection optical system 550 disposed to achieve a set angle, thereby reducing the physical size of the conventional projection apparatus. That is, the projection apparatus 500 includes a first virtual line 570 passing through the optical axis 560 of the illumination optical system 510 and a second virtual line 590 passing through the optical axis 580 of the projection optical system 550. The illumination optical system 510 and the projection optical system 550 may be disposed such that the angle 591 is the set angle.

For example, as shown in FIG. 6, the projection apparatus 500 may include an illumination optical system 510 and a projection optical system 550 arranged to form a '30 degree 'to reduce the vertical size by the first size 610. The second size 620 may be reduced horizontally.

Referring to FIG. 7, the projection apparatus may include n (n is a natural number) light sources. In this case, the projection apparatus may include, for example, one or two light sources 710 on one side or the other side of the illumination optical system.

Referring to FIG. 8, the reflection member in the projection apparatus may reflect light received from the illumination optical system and transmit the light to the DMD element. In this case, the reflective member may be configured in any one of a planar shape, a concave shape and a convex shape.

For example, when the reflective member is configured as the concave shape 820, light may be increased by radiating light of a narrower area to the DMD element than when the planar shape 810 is used, and in the case of the convex shape 830, the planar shape When the light is wider than 810, the DMD device is irradiated with light, thereby increasing the uniformity of the light.

Referring to FIG. 9, light incident on a DMD element may be, for example, three directions (Diagonal, Side, and Bottom) according to driving characteristics of the DMD element in the projection apparatus. At this time, the image light reflected by the DMD element is vertically emitted and transmitted to the projection optical system, and thus may be projected by the projection optical system.

Referring to FIG. 10, in step 1010, the illumination optical system in the projection apparatus may irradiate light generated from a light source to a DMD element. In this case, the controller in the projection apparatus may determine an irradiation angle of light transmitted to the DMD element based on a driving characteristic of the DMD element, and change the inclination of the reflective member according to the determined irradiation angle. Thereafter, the reflection member in the projection apparatus may reflect the light received from the illumination optical system and transmit the reflected light to the DMD element.

The reflective member may be configured in any one of a planar shape, a concave shape, and a convex shape in which the size of the transmission area for the light and the degree of distribution for the light are different. In the case of the concave shape, the reflecting member may increase efficiency by irradiating the DMD device with light in a narrower area than the planar shape, and in the case of the convex shape, light in a wider area than the planar shape may be applied to the DMD device. Irradiation has an effect of increasing the uniformity to distribute the light evenly.

In operation 1020, the projection optical system in the projection apparatus may receive and project the image light reflected by the light from the DMD element. The projection optical system may be arranged to form an angle with the illumination optical system.

At this time, the prism in the projection apparatus may receive the image light reflected from the DMD element vertically, change the path to the image light, and transmit the image light to the projection optical system.

On the other hand, the control unit in the projection apparatus, in an arrangement position that is not parallel to the projection optical system, to change the angle differently by rotating the illumination optical system, to check the physical size occupied by the projection apparatus, and the identified physical By setting the angle at the smallest size among the sizes, the physical size of the projection apparatus can be minimized by rearranging the illumination optical system and the projection optical system.

In addition, the controller in the projection apparatus adjusts the inclination of the reflective member according to the degree of rotation of the illumination optical system to reposition with the projection optical system, thereby making the irradiation angle of the light transmitted to the DMD element constant.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the devices and components described in the embodiments may include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable arrays (FPAs), It may be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to the execution of the software. For the convenience of understanding, the processing apparatus may be described as one used, but those skilled in the art will appreciate that the processing apparatus includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as parallel processors.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and may configure the processing device to operate as desired, or process independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. Or may be permanently or temporarily embodied in a signal wave to be transmitted. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. Software and data may be stored in one or more computer readable storage media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed by various computer means and stored in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions stored in the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer readable storage media include magnetic media such as hard disks, floppy disks and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks such as floppy disks. Hardware devices specially configured to store and execute program instructions such as magneto-optical media and ROM, RAM, flash memory and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or, even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims

An illumination optical system for irradiating light generated from a light source to a digital micromirror device (DMD) device; And

A projection optical system arranged to form a predetermined angle with the illumination optical system and receiving and projecting image light reflected from the DMD element

Projection apparatus comprising a.
The method of claim 1,

In an arrangement position not parallel to the projection optical system, by rotating the illumination optical system to change the angle differently, the physical size occupied by the projection apparatus is checked, and the angle at the smallest of the identified physical sizes is checked. A controller configured to rearrange the illumination optical system and the projection optical system

Projector further comprising a.
The method of claim 1,

A reflecting member reflecting light received from the illumination optical system and transmitting the reflected light to the DMD element; And

A controller configured to determine an irradiation angle of light transmitted to the DMD element based on a driving characteristic of the DMD element, and to change an inclination of the reflective member according to the determined irradiation angle

Projector further comprising a.
The method of claim 3,

The reflective member,

The shape of any one of a planar shape, a concave shape, and a convex shape in which the magnitude | size of the transmission area | region with respect to the said light and the distribution degree with respect to the light are different

Projection device.
The method of claim 3,

The control unit,

By adjusting the inclination of the reflecting member according to the degree of rotation of the illumination optical system to reposition with the projection optical system, the irradiation angle of the light transmitted to the DMD element is constant

Projection device.
The method of claim 1,

The prism receiving the image light reflected from the DMD element vertically, changing the path to the image light, and transferring the image light to the projection optical system

Projector further comprising a.
In an illumination optical system, irradiating light generated from a light source to a DMD element; And

Receiving and projecting the image light reflected by the light from the DMD element in a projection optical system arranged to form an angle with the illumination optical system;

Method of operation of the projection device comprising a.
The method of claim 7, wherein

Confirming, by a controller, a physical size occupied by the projection apparatus as the angle is changed differently by rotating the illumination optical system at an arrangement position not parallel to the projection optical system; And

Repositioning the illumination optical system and the projection optical system by setting an angle at the smallest size among the identified physical sizes in the controller;

Operation method of the projection device further comprising.
The method of claim 7, wherein

Determining, at the controller, an irradiation angle of light transmitted to the DMD element based on a driving characteristic of the DMD element, and changing an inclination of the reflective member according to the determined irradiation angle; And

Reflecting the light received from the illumination optical system and transmitting the reflected light to the DMD device

Operation method of the projection device further comprising.
The method of claim 9,

The reflective member,

It is composed of any one of a planar shape, a concave shape and a convex shape, the size of the transmission region for the light and the distribution of the light is different.

How the projection device works.
The method of claim 9,

Adjusting the inclination of the reflective member according to the degree of rotation of the illumination optical system to reposition the projection optical system, thereby making the irradiation angle of light transmitted to the DMD element constant;

Operation method of the projection device further comprising.
The method of claim 7, wherein

In the prism, receiving the image light reflected from the DMD element vertically, changing the path to the image light, and transmitting to the projection optical system

Operation method of the projection device further comprising.