WO2023249297A1

WO2023249297A1 - Book beam comprising portable structure enabling reading

Info

Publication number: WO2023249297A1
Application number: PCT/KR2023/007947
Authority: WO
Inventors: 박병무
Original assignee: 박병무
Priority date: 2022-06-19
Filing date: 2023-06-09
Publication date: 2023-12-28
Also published as: KR20230174125A

Abstract

A book beam according to an embodiment of the present invention comprises: a body unit which has a structure enabling holding or carrying on a surface on which same is to be provided, and which has, on one side thereof, a communication port that can be connected from the outside; a wireless communication module, which is mounted inside the body unit, receives wireless communication data, in which book contents to be stored are to be contained, so as to be stored in a data storage unit, and controls the operation of a projection unit according to an input signal received from a remote control; the data storage unit which is mounted inside the body unit, and which stores the wireless communication data received from the wireless communication module; and the projection unit which is mounted on one side surface of the body unit, and which operates by means of a control signal transmitted from the wireless communication module so as to generate an image in the air on the basis of a control value input in advance.

Description

Book beam comprising a portable reading structure

The present invention relates to a book beam, and more specifically, to a book beam that includes a structure that allows the contents of books to be read to be selected and stored, carried, and easily viewed at the same time.

In general, when borrowing books from a library to read, a reading table must be prepared. If you cannot prepare a reading table, you will have to hold the book in your hand and read uncomfortably.

When carrying the above-mentioned books and a reading stand by storing them inside a bag, there is a problem in that they occupy a relatively large volume inside the bag and have a high weight compared to other carried items, so portability is significantly low.

To solve this problem, the screen-integrated beam projector shown in FIG. 1 was developed.

However, the conventional technology shown in Figure 1 also has a large self-load, making it very difficult to carry, and has the inconvenient problem of having to unfold the screen to use it.

Therefore, there is a need for a technology that can solve the problems caused by the prior art mentioned above.

The purpose of the present invention is to provide a book that can be viewed on a portable basis after easily selecting and storing the contents of the book to be read using a communication port or wireless communication, and that a screen structure is not required when projecting the contents of the book, so that it can be easily viewed. It provides a beam.

A book beam according to one aspect of the present invention for achieving this purpose has a structure that can be mounted or carried on a surface to be installed, and includes a main body on one side of which a communication port accessible from the outside is mounted; A wireless communication module that is mounted inside the main body, receives wireless communication data containing book content to be stored, stores it in a data storage unit, and controls the operation of the projection unit according to an input signal received from a remote control; A data storage unit mounted inside the main body and storing data containing the contents of books purchased by the user only for the beam projector through a wireless communication module; and a projection unit mounted on one side of the main body and operated by a control signal transmitted from a wireless communication module to generate an image in the air based on a previously input control value.

In one embodiment of the present invention, the projection unit includes a lighting unit consisting of a plurality of light source units that are sequentially turned on and off repeatedly. a holographic optical unit that reproduces light forming a plurality of screen images spaced apart in depth in space when light from the lighting unit is incident; The light reproduced from the holographic optical unit is modulated according to the image signal, one frame of image is divided into a plurality of pieces equal to the number of light source units, and a plurality of sub-frame images to be imaged at positions spaced apart in the depth direction are generated. A sequentially modulated display panel; and an optical path conversion unit disposed in the optical path between the lighting unit and the holographic optical unit, changing the path so that the light illuminated by the plurality of light source units enters the holographic optical unit at different angles of incidence, and including a Fresnel lens. It may be a configuration that includes.

In one embodiment of the present invention, the holographic optical unit may include a plurality of holographic elements in which the plurality of screen images are respectively recorded, or a single hologram element in which the plurality of screen images are multiplexed using light in different directions as reference light. It includes, the plurality of sub-frame images include a background image and a front image, the plurality of screen images respectively recorded in the plurality of hologram elements are recorded using light in different directions as reference light, and the plurality of holograms The material of the device is photoresist or photopolymer, and the material of the plurality of holographic devices is holographic polymer dispersed liquid crystal (HPDLC) that is electrically controlled on/off, The plurality of hologram elements may be sequentially turned on and off in synchronization with the driving of the plurality of light source units.

In one embodiment of the present invention, the remote control includes a function for enlarging or reducing an image generated from the projection unit; A function to turn pages of images generated from the projection unit; A function to select and play a page of an image generated from the projection unit; And it may be a configuration that includes a function to recognize the user's hand gestures and turn the pages of the video or select and play it.

In one embodiment of the present invention, the main body part includes: a main body holder that is mounted on both sides of the main body part and can be mounted on a surface to be installed, and has a structure that can change the mounting angle of the main body part according to the user's intention; It may be a configuration that includes.

As explained above, according to the book beam of the present invention, it is provided with a main body of a specific structure, a wireless communication module, a data storage unit, and a projection unit, so that the contents of the book to be viewed can be easily selected and stored using a communication port or wireless communication. It can be viewed on a portable basis, and when projecting book contents, a screen structure is not required, so it is possible to provide a book beam that includes a configuration that allows easy viewing.

1 is a perspective view showing a book beam projector according to the prior art.

Figure 2 is a schematic diagram showing a book beam according to an embodiment of the present invention.

Figure 3 is a control flowchart of a book beam according to an embodiment of the present invention.

Figure 4 is a cross-sectional view showing a projection unit of a book beam according to an embodiment of the present invention.

FIGS. 5 to 8 are conceptual diagrams illustrating the principle of forming a plurality of screen images by the holographic optical unit of the imaging unit mounted on the book beam shown in FIG. 4.

Figure 9 is a cross-sectional view showing a projection unit of a book beam according to another embodiment of the present invention.

Figure 10 is a graph illustrating the diffraction efficiency of a holographic device.

Figure 11 is an implementation diagram of a book beam according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to this, terms and words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be construed with meanings and concepts consistent with the technical idea of the present invention.

Throughout this specification, when a member is said to be located “on” another member, this includes not only cases where a member is in contact with another member, but also cases where another member exists between the two members. Throughout this specification, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Figure 2 shows a schematic diagram showing a book beam according to an embodiment of the present invention, and Figure 3 shows a control flowchart of a book beam according to an embodiment of the present invention. Additionally, Figure 11 shows an implementation diagram of a book beam according to an embodiment of the present invention.

Referring to these drawings, the book beam 100 according to this embodiment is provided with a main body 110, a wireless communication module 120, a data storage unit 130, and a projection unit of a specific structure, so that books to be viewed are displayed. Contents can be easily selected and stored using the communication port 150 or wireless communication and then viewed on a portable basis. Since no screen structure is required when projecting book contents, a book beam can be provided that includes a configuration that allows easy viewing.

Hereinafter, each component constituting the book beam 100 according to this embodiment will be described in detail with reference to the drawings.

The main body 110 according to this embodiment has a structure that can be mounted or carried on a surface to be installed, and has a communication port 150 mounted on one side that can be accessed from the outside.

In some cases, as shown in FIG. 2, main body mounts 170 are mounted on both sides of the main body 110, so that they can be mounted on the surface to be installed, and the main body 110 can be mounted according to the user's intention. ), the mounting angle can be changed. In this case, the position and angle of the main body 110 can be changed to suit the user's various postures, and furthermore, the book beam 100 can be operated easily and stably even when the user is lying down.

The wireless communication module 120 according to this embodiment is a component mounted inside the main body 110, receives wireless communication data containing the contents of the book to be stored, stores it in the data storage unit 130, and controls the remote control. The operation of the projection unit 160 can be controlled according to the input signal received from 140.

In this case, the remote control 140 according to this embodiment includes various functions, for example, a function to enlarge or reduce the image generated from the projection unit, a function to turn the page of the image generated from the projection unit, It may have a structure that includes a function to select and play a page of the image generated from the projection unit, and a function to turn or select a page of the image and play it by recognizing the user's hand gestures.

The data storage unit 130 according to this embodiment is a component mounted inside the main body 110 and can store wireless communication data received from the wireless communication module 120.

Users can purchase book data and store and use the purchase data in the data storage unit 130. Places where book data can be purchased may be places where it can be purchased using the Internet information and communication network, or it may be a general library. In other words, you can purchase book data and update the purchase data in the book beam 100 according to this embodiment to view the book.

The projection unit 160 according to this embodiment is a component mounted on one side of the main body 110, and is operated by a control signal transmitted from a wireless communication module to generate an image in the air based on a previously input control value. can do.

Figure 4 shows a cross-sectional view showing a projection unit of a book beam according to an embodiment of the present invention. In addition, FIGS. 5 to 8 show conceptual diagrams explaining the principle of forming a plurality of screen images by the holographic optical unit of the imaging unit mounted on the book beam shown in FIG. 4.

Referring to these drawings, the projection unit 160 according to the present embodiment may be configured to include a lighting unit 161, a hologram optical unit 163, a display panel 164, and an optical path conversion unit 162 of a specific structure. there is.

Specifically, the lighting unit 161 of the projection unit 160 has a structure comprised of a plurality of light source units that are sequentially turned on and off repeatedly. When light from the lighting unit 161 is incident on the hologram optical unit 163, light that forms a plurality of screen images whose positions in the depth direction are spaced apart in space is reproduced. The display panel 164 modulates the light reproduced from the hologram optical unit 163 according to the image signal, and the image of one frame is divided into a plurality of pieces equal to the number of light source units and displayed at positions spaced apart in the depth direction. A plurality of sub-frame images to be imaged can be sequentially modulated. In addition, the optical path conversion unit 162 is a component disposed in the optical path between the lighting unit 161 and the holographic optical unit 163, and the light illuminated from the plurality of light source units is transmitted to the holographic optical unit 163 at different angles of incidence. It changes the path to enter the light and is a structure that includes a Fresnel lens.

Figure 9 shows a cross-sectional view showing a projection unit of a book beam according to another embodiment of the present invention, and Figure 10 shows a graph exemplarily showing the diffraction efficiency of a holographic element.

Referring to these drawings, the hologram optical unit 163 according to this embodiment includes a plurality of

hologram elements

163a, 163b, and 163c, each of which records a plurality of screen images, or the plurality of screen images emit light in different directions. It may be a configuration that includes one hologram element recorded multiple times using as a reference light.

At this time, it is preferable that the plurality of sub-frame images include a background image and a front image, and that the plurality of screen images respectively recorded in the plurality of hologram elements are recorded using light in different directions as reference light.

Specifically, the material of the plurality of hologram elements is photoresist or photopolymer, and the material of the plurality of hologram elements is holographic polymer dispersed liquid whose turning on and off is electrically controlled. crystal, HPDLC) is preferred. At this time, the plurality of hologram elements may be sequentially turned on and off in synchronization with the driving of the plurality of light source units.

Here, the principle by which the first hologram element 163a and the second hologram element 163b form a plurality of screen images whose positions are spaced apart in space is explained as follows.

Figures 3 and 5 show the process of recording a hologram corresponding to a screen image on a hologram medium 163a' to produce a first hologram element 163a and playing a screen image therefrom. The hologram corresponding to the screen image can be formed, for example, by recording the image of the diffuser 10 on the hologram medium 163a'. The hologram medium 163a' is a photosensitive medium sensitive to light and is formed of materials such as photoresist and photopolymer, and is an optical interference pattern of object light containing image data and reference light that does not contain data. Video information can be saved by . That is, when light is irradiated to the diffuser 10, object light Lo containing image data of the diffuser 10 comes out from the diffuser 10, and this object light Lo and reference light containing no image data are emitted. An interference pattern formed by interference of (Lr1) is recorded on the hologram medium 163a'. At this time, a laser beam with good coherence is used as the light forming the reference light (Lr1). In FIG. 11, the first hologram element 163a shows that an image hologram of the diffuser 10 located at a distance d1 is recorded on the hologram medium 163a'. When the same reference light (Lr1) used during recording is irradiated to the first hologram element (163a), the reference light (Lr1) is diffracted by the hologram formed in the first hologram element (163a), thereby causing the object light (Lo). is restored. The restored object light Lo represents a diffuser image, which is equivalent to forming a screen S1 in a space spaced apart by a distance d1 from the first hologram element 163a.

Figures 7 and 8 show the process of recording a hologram corresponding to a screen image on a hologram medium 163b' to produce a second hologram element 163b and playing back a screen image therefrom. This time, after the diffuser 10 is spaced apart from the holographic medium 163b' by a distance d2, the object light Lo containing the image of the diffuser 10 and the reference light Lr2 not containing image data are transmitted to the holographic medium 163b'. ') to be investigated. At this time, the angle at which the reference light Lr2 is incident on the hologram medium 163b' is different from that of the reference light Lr1 in FIGS. 5 and 6. An interference pattern formed by interference between the object light Lo and the reference light Lr2 is recorded in the hologram medium 163b'. In FIG. 13, the second hologram element 163b shows that an image hologram of a diffuser located at a distance d2 is recorded in the hologram medium 163b'. When the reference light Lr2 used during recording is irradiated to the second hologram element 163b, the object light Lo is restored and a screen S2 is formed at a distance d2 from the second hologram element 163b.

The three-dimensional image display device 100 of this embodiment employs the first and

second hologram elements

163a and 163b manufactured on the same principle, and in principle, the hologram has the characteristic of being reproduced only at the angle of the reference light used for recording. will be used. In other words, a hologram shows maximum efficiency when reproduced at the same angle as the reference light at the time of recording, and this angle is called the Bragg angle. As it deviates from this angle, the diffraction efficiency drops rapidly. In the graph of FIG. 15 showing the diffraction efficiency, the horizontal axis represents the degree of deviation from the Bragg angle, and the vertical axis represents the diffraction efficiency. Referring to the graph, it can be seen that there are cases where the diffraction efficiency drops to 0 as the Bragg angle deviates. Applying this principle, when reproducing the holograms recorded in each of the first and

second hologram elements

163a and 163b, when adjusting the angle of the illumination light to suit each Bragg angle, the first and

second hologram elements

163a , 163b), the images recorded in each can be played back without mutual interference.

In the first and second light source units (161a, 161b), light is incident on the first and second hologram elements (163a, 163b) at an angle corresponding to the reference light of each of the first and second hologram elements (163a, 163b). The light is illuminated sequentially so that Accordingly, light formed at different positions from the first and

second hologram elements

163a and 163b is sequentially reproduced.

Holographic polymer dispersed liquid crystal (HPDLC) can be used as a holographic medium for forming the first and

second hologram elements

163a and 163b constituting the above-described hologram optical unit 163. Polymer dispersed liquid crystal (PDLC) is a material formed by dispersing polymers within a liquid crystal cell, and has the property of being controlled in a transparent and diffuse state according to electrical control. In particular, it is known that when recording a hologram on HPDLC formed by dispersing a photopolymer in a liquid crystal cell, the holographic image can be electrically switched.

The display panel 164 forms an image by modulating the light reproduced in this way by the hologram optical unit 163 according to the image signal, and may be composed of, for example, a liquid crystal panel. Since the first and

second hologram elements

163a and 163b are disposed behind the display panel 164, the display panel 164 converts the light reproduced from the first and

second hologram elements

163a and 163b into an image signal. Modify accordingly. The display panel 164 divides one frame of image into a plurality of images and implements them alternately using time division (time multiplexing). For example, one frame of image is divided into two sub-frame images, and the display panel 164 modulates light according to the image signal corresponding to each. The two sub-frame images can be the background image (I1) and the foreground image (I2). The cycle in which the display panel 164 alternately implements the background image (I1) and the front image (I2) is recognized as an image of a frame that should be shorter than the blink of the eyes of the passenger or waiting person for boarding, for example, 1/120 second. shorter than As shown in the drawing, the background image (I1) with respect to the front image (I2) creates a sense of depth as much as d, which is the difference between d2 and d1, to passengers or those waiting to board, and thereby a three-dimensional image can be perceived.

The optical path conversion unit 162 is disposed in the optical path between the lighting unit 161 and the holographic optical unit 163, so that light from the first and second

light source units

161a and 161b enters the holographic optical unit at different angles. The idea is to join (163). For example, the optical path conversion unit 162 converts the light from the first and second

light source units

161a and 161b to the angle of the reference light used when recording a hologram in the first and

second hologram elements

163a and 163b. Convert the optical path to have . To this end, the optical path conversion unit 162 may be made of a Fresnel lens arranged at an angle with respect to the fixing plate 161c on which the first and second

light source units

161a and 161b are mounted. The Fresnel lens serves to converge and collimate light, and as shown, since it is disposed at an angle with respect to the fixing plate 161c, the light from the first and second

light source units

161a and 161b It enters the Fresnel lens at these different angles of incidence. Accordingly, the light from the first and second

light source units

161a and 161b has paths that pass through the Fresnel lens 121 and then enter the hologram optical unit 163 at different angles. The degree to which the Fresnel lens is tilted with respect to the fixing plate 161c can be appropriately determined by considering the reference light angle when recording a hologram in the first and

second hologram elements

163a and 163b. In the drawing, a single Fresnel lens is illustrated as the optical path conversion unit 162, but a plurality of path conversion members respectively disposed on the optical paths from the first and second

light source units

161a and 161b may be employed. In addition, a plurality of condensing lenses may be further provided. In addition, the

rotation drive units

161d and 162a are mounted on the fixed end of the fixing plate 161c and the optical path conversion unit 162, so that each tilt can be adjusted to an optimal state (see Figure 9).

The wireless communication module 120 controls the operation of the lighting unit 161 and the display panel 164. For example, the wireless communication module 120 sequentially modulates image signals corresponding to two sub-frame images in the display panel 164. They are synchronized to control the turning on and off of the first and second

light source units

161a and 161b. In addition, as described above, when the first and

second hologram elements

163a and 163b are made of holographic polymer dispersed liquid crystal, each of the first and

second hologram elements

163a and 163b is synchronized with the lighting signal and the image signal. to control switching.

As described above, the holographic optical unit 163 forms a plurality of screen images and the synchronized operation of the display panel 164 and the lighting unit 161 causes a difference in the sense of depth by d for passengers or those waiting to board. sees two images (I1, I2) and recognizes a 3D image. In addition, it is possible to implement a general two-dimensional image by using only one of the plurality of

light source units

161a and 161b constituting the lighting unit 161 and modulating the light according to the two-dimensional image signal in the display panel 164. do.

For example, as shown in Figure 11, the I2 image placed relatively at the back implements an image representing the exterior shape and paper material of the book, and the I1 image placed relatively at the front represents images printed on each page of the book. Videos representing text, pictures, or photos can be created.

In some cases, the I2 image placed at the back may consist of various landscape photos or illustrations, but is of course not limited thereto.

As described above, according to the book beam of the present invention, by providing a main body 110, a wireless communication module 120, a data storage unit 130, and a projection unit of a specific structure, the contents of the book to be viewed are transmitted through a communication port. (150) Alternatively, a book beam can be provided that can be viewed on a portable basis after being easily selected and saved using wireless communication, and a screen structure is not required when projecting book contents, so it is possible to provide a book beam that includes a configuration that allows for easy viewing.

The form for carrying out the invention has been described together with the above best form for carrying out the invention.

The present invention relates to a book beam, which has a main body of a specific structure, a wireless communication module, a data storage unit, and a projection unit, so that the contents of books to be read can be easily selected and stored using a communication port or wireless communication and then viewed on a portable basis. In addition, since a screen structure is not required when projecting book contents, it is possible to provide a book beam with a structure that can be easily viewed, so it has industrial applicability.

Claims

A main body 110 that has a structure that can be mounted or carried on a surface to be installed and is equipped with a communication port 150 accessible from the outside on one side;

It is mounted inside the main body 110, receives wireless communication data containing the contents of the book to be stored, stores it in the data storage unit 130, and displays the projection unit 160 according to an input signal received from the remote control 140. A wireless communication module 120 that controls the operation of;

A data storage unit 130 that is mounted inside the main body 110 and stores data containing the contents of books purchased by the user only for the beam projector through the wireless communication module 120; and

It is mounted on one side of the main body 110 and operates by a control signal transmitted from a wireless communication module to generate an image in the air based on the previously input control value, allowing the contents of the purchased book to be viewed. Consular Department (160);

Including,

The remote control 140,

A function to enlarge or reduce the image generated from the projection unit;

A book beam comprising:
According to paragraph 1,

The projection unit 160,

A lighting unit 161 consisting of a plurality of light source units that are sequentially turned on and off repeatedly;

When light from the lighting unit 161 is incident, a holographic optical unit 163 reproduces the light forming a plurality of screen images whose positions in the depth direction are spaced apart in space;

The light reproduced from the holographic optical unit 163 is modulated according to the image signal, and the image of one frame is divided into a plurality of pieces equal to the number of light source units, and a plurality of sub to be imaged at positions spaced apart in the depth direction. A display panel 164 that sequentially modulates frame images; and

It is disposed in the optical path between the lighting unit 161 and the holographic optical unit 163, changes the path so that the light illuminated by the plurality of light source units enters the holographic optical unit 163 at different angles of incidence, and uses a Fresnel lens. An optical path conversion unit 162 including;

A book beam comprising:
According to paragraph 2,

The holographic optical unit 163,

It includes a plurality of hologram elements (163a, 163b, 163c) on which the plurality of screen images are respectively recorded, or a single hologram element on which the plurality of screen images are recorded in multiple ways using light in different directions as reference light,

The plurality of sub-frame images include a background image and a foreground image,

The plurality of screen images recorded in each of the plurality of hologram elements are recorded using light in different directions as reference light,

The material of the plurality of hologram elements is photoresist or photopolymer,

The material of the plurality of holographic elements is holographic polymer dispersed liquid crystal (HPDLC) that is electrically controlled on/off,

Book beam, characterized in that the plurality of hologram elements are sequentially turned on and off in synchronization with the driving of the plurality of light source units.
According to paragraph 1,

The remote control 140,

A function to turn pages of images generated from the projection unit;

A function to select and play a page of an image generated from the projection unit; and

A function that recognizes the user's hand gestures to turn pages or select a video to play;

Book beam, characterized in that it further comprises.
According to paragraph 1,

The main body 110,

A main body holder 170 that is mounted on both sides of the main body 110 and can be mounted on a surface to be installed, and has a structure that can change the mounting angle of the main body 110 according to the user's intention;

A book beam comprising: