KR20090050186A - Projector and mobile communication terminal there with - Google Patents

Abstract

A small projector and a mobile communication terminal having the same are provided. A small projector according to the present invention is a projector capable of projecting a screen of a resolution provided by a mobile communication terminal, and is formed by applying a light source and light from the light source to an optical modulator unit and projecting image light passing through the optical modulator unit. An optical processing unit for projecting through the lens system and an optical modulator unit for adjusting an optical transmission degree using light formed from the optical processing unit to form an image, and the projection lens system of the optical processing unit includes a plurality of lenses, At least one of the lenses may be a polygonal lens.

Projection, projector, projection lens system

Description

Small projector and mobile communication terminal having the same {Projector and mobile communication terminal there with}

The present invention relates to a small projector and a mobile communication terminal having the same, and more particularly, to a small projector having a reduced volume of a projection lens system and a mobile communication terminal having the same.

The small projector should be minimized in volume to a structure suitable for being embedded or mounted in the mobile communication terminal, and the present invention relates to a technique for minimizing the volume of the small projector.

Today's mobile phones are accelerating high functionality and complexity in addition to the basic features of voice calls.

In recent years, mobile phones have been increasingly used to process multimedia data in addition to wireless communication functions, and process various functions such as cameras, TV receivers, satellite broadcast receivers, and games to process the multimedia data. It is loaded with programs, and these mobile phones are increasingly becoming multifunctional terminals.

The various functions are provided with the image of the corresponding function on the display screen of the conventional portable terminal and provides audio along with the image.

For example, a user selects a broadcast of a TV channel through a conventional portable terminal, receives an image of the selected TV channel through a display screen of the portable terminal, and simultaneously connects the built-in speaker of the portable terminal or an earphone to the portable terminal. Audio is provided through.

In the conventional mobile terminal, since a display screen displaying an image is limited, there is a problem in that an image executed through the mobile terminal can only be provided to a user through a limited display screen of the mobile terminal.

In order to solve such a problem, a technology for miniaturizing a projector to be provided in a portable terminal to display a larger image has been developed.

Existing projectors generally color-separate white light to modulate each color light separately, and then recombine the modulated color light to project an image with a projection lens.

Since the light source of the projector uses strong white light, the heat dissipation problem is also serious, so that the space arrangement of each optical component is large and the components for cooling are large, so that the overall volume is large. However, as the market demand for small and portable projectors is gradually increasing, there is a demand for the emergence of a small projector that can be embedded in a personal imager such as a mobile phone, which is smaller than a pack.

As a method of miniaturizing the projector, by replacing the light source corresponding to the color light of each of the R, G, B with a laser light source to exclude the color separation system, it was possible to improve heat dissipation characteristics and reduce the size of the optical component.

However, even if the size of the optical components is reduced, the most important factor affecting the size of the entire projector is the projection lens. The size and length of the entire projector are affected by the size of the projection lens barrel.

Therefore, in developing a compact projector having a minimum volume to be embedded in a mobile communication terminal, there is a need for a method of further minimizing the volume of the projection lens.

Accordingly, the present invention is to solve the above-mentioned disadvantages and problems of the prior art, the technical problem to be achieved by the present invention, by modifying the lens shape of the projection lens system is provided with a small projector and minimized the volume of the projection lens system It is to provide a mobile communication terminal.

Another technical problem to be achieved by the present invention is a projector capable of adjusting an offset, a compact projector having a small volume and a mobile communication terminal having the same in such a way as to reduce unnecessary portions of the projection lens in consideration of the transmission area of the image light of the projection lens system. To provide.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

A compact projector according to the present invention for achieving the above object is a projector capable of projecting a screen of a resolution provided by a mobile communication terminal, the light source, and shaping the light from the light source and applied to the optical modulator unit, And an optical processing unit for projecting the image light passing through the modulator unit through a projection lens system, and the optical modulator unit forming an image by adjusting the transmission degree of the light by using the light formed from the optical processing unit. The projection lens system may include a plurality of lenses, and at least one of the plurality of lenses may be a polygonal lens.

Here, the light source may include a laser light source, and may also include a light emitting diode (LED) light source.

Here, the optical modulator unit may be configured to include a liquid crystal panel.

The apparatus may further include a signal processor configured to provide an electrical signal corresponding to an image to be acquired and a control signal required for driving the projector to the light source and the optical modulator.

The projection lens system may include at least one rectangular lens.

In addition, the cross-sectional shape of the barrel of the projection lens system may be polygonal. The cross-sectional shape of the barrel of the projection lens system may be rectangular.

The projection lens system may have a shape in which at least one lens is cut out of an arc of a portion of the circular lens perpendicular to the normal line.

On the other hand, it is preferable that the projection lens system is designed to enable offset adjustment.

A mobile communication terminal according to the present invention for achieving the above object is a mobile communication terminal having a projector capable of projecting a screen of the resolution provided by the mobile communication terminal, which is responsible for wireless transmission and reception of voice calls and data communications, etc. And a communication unit, a memory for downloading and storing multimedia data including a video signal, a projector displaying the multimedia data, and an interface unit for communication between the projector and the mobile communication terminal. The light is formed by applying the light from the light source to the optical modulator unit, and the optical processing unit for projecting the image light passing through the optical modulator unit through the projection lens system, and the light transmitted from the optical processing unit to adjust the degree of transmission of the image The optical module to form Include a, and the projection lens system of the optical processing unit is provided with a plurality of lenses, at least one of the plurality of lenses may be a polygon lens.

In this case, the projector may be a portable form detachable to the mobile communication terminal.

In addition, the projector may be embedded in the mobile communication terminal.

On the other hand, the projector has a housing having a long width and a short width, it is preferable that the offset adjustment direction of the projector coincides with the direction of the long width.

Therefore, the present invention can minimize the size of the small projector mounted on the mobile communication terminal by reducing the volume of the projection lens system by modifying the lens shape of the projection lens system. In addition, in the case of a projector which can be offset-adjusted, it is possible to minimize the size of the small projector mounted on the mobile communication terminal by reducing unnecessary portions of the projection lens in consideration of the transmission area of the image light of the projection lens system.

Details of the above object and technical configuration of the present invention and the resulting effects thereof will be more clearly understood from the following detailed description based on the accompanying drawings.

First, Figure 1 is a block diagram of a mobile communication terminal having a small projector of the present invention.

As shown in FIG. 1, the mobile communication terminal 10 including the small projector according to the present invention is a mobile communication terminal having a small projector capable of projecting a screen having a resolution provided by the mobile communication terminal. The communication unit 13 responsible for wireless transmission and reception of voice calls and data communications, a memory 12 for downloading and storing multimedia data including video signals, and various operations for receiving, storing and managing the multimedia data And a control unit 11 for controlling, a small projector 14 as a display device for displaying the multimedia data, and an interface unit 15 for communication between the small projector 14 and the mobile communication terminal.

Here, the small projector 14 may be embedded in a portable form or a form embedded in the mobile communication terminal 10.

The compact projector 14 may have a housing having a long width and a short width, in which the size of the projection lens system is relatively small.

The small projector 14 may be designed to enable offset adjustment, and the offset adjustment direction is preferably coincident with the direction of the long width.

In the following, a detailed configuration of the compact projector will be described in detail.

Referring to Figures 2 and 3, the configuration of the compact projector will be described in detail.

FIG. 2 is a schematic configuration diagram of the small projector of FIG. 1, and FIG. 3 is an exploded perspective view for explaining a detailed configuration of the small projector.

As shown in FIG. 2 and FIG. 3, the small projector 14 is a projector capable of projecting a screen having a resolution provided by the mobile communication terminal 10, and can be mounted and used in a portable medium such as a mobile communication terminal. It is a portable type that can be detached or a small projector that can be embedded in the mobile communication terminal.

The small projector is configured to apply the light source 100 of each of the R, G, and B (110, 120, 130) and the light from the light source 100 into a predetermined shape and apply it to the optical modulator unit 300. An optical processor 200 configured to project the image light that has passed through the optical modulator unit 300 onto the screen 1 through the projection lens system 250, and the light molded in a predetermined form from the optical processor 200. The light modulator 300 to form an image by adjusting the degree of transmission of light, an electrical signal corresponding to an image to be obtained, and various control signals required for driving a projector. It is configured to include a signal processor 400 for transmitting to the modulator 300.

The light source 100 uses light sources 110, 120, and 130 of R, G, and B, respectively, and a laser light source or a light emitting diode (LED) light source may be employed.

The optical processor 200 collects light emitted from each of the R, G, and B light sources 110, 120, and 130 using the condensing lenses 211, 212, and 213, and collects the light again using a dichroic mirror ( Synthesis is performed on the same optical axis by using a color synthesis system including dichroic mirrors 221 and 222.

After forming the synthesized light of the Gaussian beam profile into the illumination light of the top hat profile using the beam shaper 230, it is sent back to the optical modulator 300 to form an image.

The image light passing through the optical modulator 300 may be projected to the screen 1 through the projection lens system 250.

Here, the dichroic mirrors 221 and 222 reflect only light of the corresponding wavelength band and pass the rest. For example, the R dichroic mirror 222 reflects only light in the R wavelength band and transmits light in the remaining wavelength band.

Reference numerals 223 and 225 denote mirrors.

The optical modulator 300 may be configured as a liquid crystal panel. When an electrical signal corresponding to an image to be obtained is selectively applied to a plurality of electrodes to drive the liquid crystal, the alignment of the liquid crystal filled on the selected electrode is performed. In other words, the degree of transmission of the light emitted from the optical processor 200 may be controlled to generate an image.

Meanwhile, when the projector of FIG. 3 is assembled and packaged, the part which most influences the packaging volume is the projection lens system 250.

The projection lens system 250 is a collection of lenses, and the thickness and length of the barrel of the projection lens system 250 most influence the thickness and length of the entire projector package.

Hereinafter, embodiments of the projection lens system optimized to reduce the volume of the projection lens system 250 will be described.

First, the projection lens system of the small projector according to the first embodiment of the present invention will be described with reference to FIGS. 4 and 5.

4 is a diagram for describing a projection lens system when there is no offset, and FIG. 5 is a diagram illustrating a cross-sectional view of image light passing through any lens of the projection lens system when there is no offset.

On the other hand, the offset (offset) is a technique to change the position of the light incident on the projection lens system to represent the step and the image when the image formed on the screen does not give an offset.

As shown in FIG. 4, in general, when there is no offset, light is incident to the center of the lens of the projection lens system 250.

In this case, as shown in FIG. 5, which shows a cross-sectional view of an image passing through any one lens of the projection lens system 250, the image light emitted from the optical modulator unit 300 and incident on the projection lens system 250 is square. Indicates the form of.

In general, since the shape of the liquid crystal panel having a predetermined resolution is mostly rectangular, the image light incident on the projection lens system 250 is generally rectangular, and may also be applied to other types of image light such as polygons. Of course.

Therefore, in the conventional circular lens 2, the remaining portion except for the portion I through which the image light passes and the margin E which is to be retained is not required. Therefore, in the first embodiment of the present invention, the projection lens system 250 The shape of the lens may be formed in the form of a rectangular lens 251.

In addition, the projection lens system 250, which is a collection of several lenses composed of various sizes, may be formed in a quadrangle of only one lens having the largest size among the lenses, within a range capable of reducing the size of the projection lens system. At least one lens is preferably rectangular in shape. In addition, all the lenses of the projection lens system 250 may have a rectangular shape.

Accordingly, the cross section of the barrel formed by the projection lens system 250 may have a quadrangular shape.

Next, a projection lens system of a small projector according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.

FIG. 6 is a diagram for describing a projection lens system when an offset is given, and FIG. 7 is a diagram illustrating a cross section in which image light passes through any lens of the projection lens system when an offset is given.

In the second embodiment of the present invention, a case in which the offset is given in the vertical direction will be described as an example.

The offset is a technique for changing the position of the light incident on the projection lens system to represent the step and the image when the image formed on the screen does not give an offset.

As shown in FIG. 6, when an offset is given, light may be incident in a downward direction from the center of the lens of the projection lens system 250.

The offset is a technique for changing the position of the light incident on the projection lens system to represent the step and the image when the image formed on the screen does not give an offset.

In this case, as shown in FIG. 7 showing the cross-section of the image light passing through any one lens of the projection lens system 250, the image light emitted from the optical modulator 300 and incident on the projection lens system 250 is Represents a rectangle.

In general, since the shape of the liquid crystal panel having a predetermined resolution is mostly rectangular, the image light incident on the projection lens system 250 is also generally rectangular. The image light may be applied to other types of image light such as polygons and the like. Of course.

In this case, when the offset is designed to be adjustable in the vertical direction, the margin E should be left in consideration of the portion where the image light can pass, and the portion I through which the image light passes in the conventional circular lens 2 and Since the remaining portions other than the above-mentioned marginal amount E to be maintained may be omitted, in the second embodiment of the present invention, the shape of the lens of the projection lens system 250 is further enlarged in the form of the lens of the first embodiment of the present invention. It may be formed in the form of a rectangular lens 252.

In addition, the projection lens system 250, which is a collection of several lenses composed of various sizes, may be formed in a quadrangle of only one lens having the largest size among the lenses, within a range capable of reducing the size of the projection lens system. At least one lens is preferably rectangular in shape. In addition, all the lenses of the projection lens system 250 may have a rectangular shape.

Accordingly, the cross section of the barrel formed by the projection lens system 250 may have a quadrangular shape.

Next, the projection lens system of the small projector according to the third embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a diagram for explaining a state in which an image light passes through any one lens of a projection lens system designed to allow offset adjustment in a horizontal direction.

The offset is a technique for changing the position of the light incident on the projection lens system to represent the step and the image when the image formed on the screen does not give an offset, in the third embodiment of the present invention The case of giving in the horizontal direction will be described as an example.

As illustrated in FIG. 8, the image light emitted from the optical modulator unit 300 and incident on the projection lens system 250 may have a rectangular shape.

In general, since the shape of the liquid crystal panel having a predetermined resolution is mostly rectangular, the image light incident on the projection lens system 250 is also generally rectangular. The image light may be applied to other types of image light such as polygons and the like. Of course.

In this case, when the offset is designed to be adjustable in the horizontal direction, considering the portion where the image light can pass, the upper portion of the line segment a and the lower portion of the line segment b of FIG. 8 may be omitted. At least one lens 253 of the projection lens system 250 according to the third exemplary embodiment may be formed in a shape in which an arc of a portion of the existing circular lens 2 is cut perpendicular to a normal line.

In addition, the projection lens system 250, which is a collection of lenses of various sizes, is formed in a shape in which a part of arcs are cut off perpendicularly to a normal as shown in FIG. 8. In the range capable of reducing the size of the projection lens system, the shape of at least one lens or all the lenses constituting the projection lens system 250 may be formed in a shape in which a portion of the arc is cut perpendicular to the normal.

On the other hand, when the projector is provided with a housing having a long width and a short width, when the offset is designed to be adjustable in the horizontal direction, at this time, the horizontal direction is coincident with the direction of the long width of the housing.

Therefore, according to embodiments of the present invention, the lens shape of the projection lens system occupying the largest volume may be formed to have a shape in which a non-circular rectangle or a portion of an arc is cut out perpendicular to the normal to further reduce the size of the small projector. have.

As those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features, the embodiments described above should be understood as illustrative and not restrictive in all aspects. Should be. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

The present invention described above can be applied to a mobile communication terminal having a projector.

1 is a configuration diagram of a mobile communication terminal including a small projector of the present invention.

FIG. 2 is a schematic configuration diagram of the small projector of FIG. 1.

3 is an exploded perspective view for explaining a detailed configuration of a small projector.

4 is a diagram for explaining a projection lens system when there is no offset.

FIG. 5 is a diagram illustrating a cross section in which image light passes through any lens of the projection lens system when there is no offset.

6 is a diagram for explaining a projection lens system when an offset is given.

Fig. 7 is a diagram showing a cross section in which image light passes through any lens of the projection lens system when an offset is given.

FIG. 8 is a diagram for explaining a state in which an image light passes through any one lens of a projection lens system designed to allow offset adjustment in a horizontal direction.

<Description of Symbols for Main Parts of Drawings>

100: light source 200: optical processing unit

210: condenser lens 221, 222: dichroic mirror

230: beamshaper 250: projection lens system

300: optical modulator 400: signal processor

Claims (16)

A projector capable of projecting a screen of a resolution provided by a mobile communication terminal, Light source; An optical processor for shaping and applying light from the light source to an optical modulator unit, and projecting the image light passing through the optical modulator unit through a projection lens system; And And an optical modulator unit configured to form an image by adjusting a degree of transmission of the light using the light formed from the optical processor. The projection lens system of the optical processing unit, And a plurality of lenses, at least one of the plurality of lenses being a polygonal lens. In claim 1, The light source is, A compact projector comprising a laser light source. In claim 1, The light source is Small projector comprising an LED (light emitting diode) light source. In claim 1, The optical modulator unit, Small projector comprising a liquid crystal panel. In claim 1, And a signal processor for providing an electrical signal corresponding to an image to be acquired and a control signal for driving the projector to the light source and the optical modulator. In claim 1, And the projection lens system comprises at least one rectangular lens. In claim 1, A compact projector, wherein the cross-sectional shape of the barrel of the projection lens system is polygonal. In claim 7, A small projector, wherein the cross-sectional shape of the barrel of the projection lens system is rectangular. In claim 1, The projection lens system, A compact projector, characterized in that at least one lens is shaped such that an arc of a portion of the circular lens is cut perpendicular to the normal. In claim 1, The projector according to claim 1, wherein the projection lens system is designed to allow offset adjustment. A mobile communication terminal having a projector capable of projecting a screen of a resolution provided by a mobile communication terminal, Communication unit for wireless transmission and reception, such as voice call and data communication; A memory for downloading and storing multimedia data including a video signal; A projector for displaying the multimedia data; And An interface unit for communication between the projector and the mobile communication terminal, The projector, Light source; An optical processor for shaping and applying light from the light source to an optical modulator unit, and projecting the image light passing through the optical modulator unit through a projection lens system; And And an optical modulator unit configured to form an image by adjusting a degree of transmission of the light using the light formed from the optical processor. The projection lens system of the optical processing unit, And a plurality of lenses, wherein at least one of the plurality of lenses is a polygonal lens. In claim 11, The projector, A mobile communication terminal, characterized in that the portable form detachable to the mobile communication terminal. In claim 11, The projector, And a mobile communication terminal embedded in the mobile communication terminal. In claim 11, The projector, It has a housing having a long width and a short width, And the offset adjustment direction of the projector coincides with the long width direction. In claim 11, And the projection lens system comprises at least one rectangular lens. In claim 11, The projection lens system, And at least one lens is shaped such that an arc of a portion of the circular lens is cut perpendicular to the normal.

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