KR20070033803A - Mono Panel Mobile Projector - Google Patents

Abstract

The present invention relates to a mobile projector that is built in or external to a portable terminal to project an image onto a screen by enlarging and projecting light.

In addition, according to the present invention, when a driving signal is input, after generating a video image by modulating the light emitted from the mono light source provided according to the input drive signal, the generated video image is enlarged and projected on the screen using a polygon mirror Optical modulation optical system; And a projection controller which receives the image image data from the control system of the portable terminal and generates a driving signal according to the input image image data when the control signal is input from the control system and outputs the driving signal to the optical modulation optical system.

Projection, Portable Terminal, Mobile Phone, Optical Modulation, Diffraction Optical Modulator

Description

1 panel mono projector using in mobile unit}

1 is a block diagram of a portable terminal having a built-in mobile projector according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an internal configuration of the projection driver of FIG. 1. FIG.

3A is a conceptual diagram illustrating an input data sequence of raster-type standard image input data, and FIG. 3B is a conceptual diagram illustrating a data output direction and a scan direction of image input data according to the present invention.

FIG. 4A shows a structure of image data of one frame composed of 480 * 600 pixels, and FIG. 4B is a structure diagram in which the input image data is transposed from the horizontal arrangement to the longitudinal arrangement.

5 is a perspective view of the diffractive optical modulator of FIG.

6 is a structural diagram of projection and scanning optics for projecting incident diffracted light onto a screen using a polygon mirror;

<Description of the symbols for the main parts of the drawings>

116: baseband processor 118: image sensor module processor

120: display unit 122: multimedia processor

140: projection control unit 150: light modulation optical system

151: mono light source 152: illumination optical unit

153: Diffraction type optical modulator 154: Shrylene optical unit

155: projection and scanning optics 155b: polygon mirror

160: screen

The present invention relates to a mobile projector that is built in or external to a portable terminal to project an image onto a screen by enlarging and projecting light.

Recently, due to the rapid development of electronic industry and information and communication technology, almost all industrial parts process various text and image information through units such as desktop top personal computer, laptop PC and mobile phone. As information utilization becomes higher, it is a trend that information processing work is connected to the Internet by not only desktop PCs and notebook PCs but also mobile phones.

However, display devices of terminals such as desktop PCs, laptop PCs, and mobile phones have a problem in that a certain standard monitor is integrally attached to the terminal body, thereby limiting the visual range and readability of the screen.

For example, CRT (Cathode ray tube) monitor, which is a display device of desktop PC, is limited in size but bulky and heavy, and requires relatively high driving voltage, which is disadvantageous in terms of installation conditions, and is not suitable for portable use. There is a problem that the screen direction is mainly disposed in front of the user, so that the viewing range is limited to the front of the monitor screen.

In addition, the liquid crystal display (LCD), which is a display device of a notebook PC, has a more limited screen size than the CRT, and the screen orientation is integrally attached to the notebook body so that the viewing range is mainly limited to the front of the user. There is a disadvantage that is limited.

In addition, the liquid crystal display device, which is a display device of a mobile phone, has a very small screen size and a very narrow visual range and information display area. Accordingly, the text size is very small, so the readability is low. In the connected Internet mobile phones, there is a problem that the entire Internet screen cannot be displayed due to the limited unit frame display area.

As described above, desktop PCs, notebook PCs, and mobile phones are very inconvenient when several people need to view the display screen at the same time. .

As a display device capable of solving the above problems, a liquid crystal projector which projects data on a screen through a TFT liquid crystal display device and a lens by interfacing data of a terminal data memory by connecting to a desktop PC, a notebook PC and a mobile phone with a connector is provided. However, this requires a bright light source with a long distance projection method and there is a problem that the volume of the device is large and not portable.

The present invention was devised to solve the above problems, and modulates the light emitted from a mono light source using an optical modulator to generate an image image and to enlarge the generated image image and project it onto a screen using a polygon mirror. It is an object of the present invention to provide a mobile projector that can satisfy the demand for miniaturization and low power demand of a portable terminal.

In order to achieve the above object, the present invention modulates light emitted from a mono light source provided according to an input driving signal when a driving signal is input to generate an image image, and then displays the generated image image using a polygon mirror. An optical modulation optical system projecting on the projection; And a projection controller configured to receive the image image data from the control system of the portable terminal, and generate a driving signal according to the input image image data when the control signal is input from the control system and output the driving signal to the optical modulation optical system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a portable terminal having a built-in mobile projector according to an embodiment of the present invention.

As shown in FIG. 1, a portable terminal in which a mobile projector 130 is built in accordance with an embodiment of the present invention includes a wireless communication unit 110 for performing wireless communication, a key input unit 112 for inputting information, and an image. By controlling the memory 114, the multimedia processor 122, and the projection control unit 140 of the mobile projector 130, which store data, etc., the image is displayed on the display unit 120 or projected on the screen 160. An image sensor module processor 118 for processing the image inputted from a provided camera or the like and transmitting the processed image image data to the base band processor 116 or the multimedia processor 122. The display unit 120 and an image sensor that receive the image image data from the processor 122 and display the received image image on the screen. The image image input from the module processor 118 or the baseband processor 116 is processed and transmitted to the display unit 120 to be displayed on the LCD screen or the mobile image projector 130 to transmit the image image to the screen 160. After generating the video image according to the video image data received from the multimedia processor 122 under the control of the multimedia processor 122, the baseband processor 116 to project the image is enlarged the generated image image screen 160 And a mobile projector 130 for projecting on. The multimedia processor 122 and the baseband processor 116 may be referred to as a control system.

Here, the mobile projector 130 according to the present invention, the optical modulation optical system 150 generates an image according to the image image data received from the multimedia processor 122 according to the control signal received from the baseband processor 116 A projection control unit 140 for controlling the optical modulation optical system 150 and an optical modulation for generating an image image according to a control signal input from the projection control unit 140, enlarging the generated image image and projecting it on the screen 160. The optical system 150 is included.

The projection control unit 140 includes an image input unit 142, an image data processing unit 144, and a driving signal control unit 146 as shown in FIG. 2.

In addition, the light modulation optical system 150 generates a mono light source (R, G, or B), the light source system 151 and the light incident from the light source system 152 to incident the diffraction light modulator 153 The light incident on the optical unit 152 and the illumination optical unit 152 is diffracted (that is, the illumination optical unit 152 diffracts the incident light to form diffracted light having a plurality of diffraction orders. Diffracted light of any one or more orders of the diffracted light of the diffraction orders of D will produce the desired video image.) A plurality of diffraction light modulators 153 and a plurality of diffraction light modulators 153 which generate an image image A polygon mirror is used to generate an image image of the diffraction light passing through the schlieren optics 154 under the control of the projection controller 140 and the schlieren optics 154 for passing the diffracted light of the desired order. Projection to screen 160 using And a scanning optical unit (155).

On the other hand, the image input unit 142 of the projection control unit 140 receives the image image data from the multimedia processor 122, and if the multimedia processor 122 is not provided, the image image data directly from the baseband processor 116 Receive.

In addition, the image data processing unit 144 of the projection control unit 140 performs a data transpose for converting the image image data arranged in the horizontal direction in the longitudinal direction to convert the image image data input in the horizontal direction into the vertical image image. Convert it to data and output it. The reason why the data transpose is necessary in the image data processor 144 is that in the case of the optical modulation optical system 150 using the diffractive optical modulator 153, a plurality of pixels are arranged vertically to output an image. It is designed to scan and display in the horizontal direction.

That is, as illustrated in FIG. 3A, the raster standard image input data is aligned in the lateral direction. However, the diffraction type optical modulator 153 of the optical modulation optical system 150 has a plurality of micro mirrors arranged in the longitudinal direction, as shown in FIG. 5, so that the plurality of image data are displayed while scanning in a lateral direction. have.

Accordingly, the optical modulation optical system 150 using the diffractive optical modulator 153 needs 600 longitudinally arranged data to scan an image of one frame composed of 480 × 600 pixels.

Fig. 4A shows the structure of image data of one frame composed of 480 x 600 pixels. The image data shown in FIG. 4A is input from the outside in the transverse direction, that is, in the order of (0,0), (0,1), (0,2), (0,3).

However, since the optical modulation system 153 using the diffraction type optical modulator 153 requires data arranged in 600 longitudinal directions, as shown in FIG. 4B, the input image data has a longitudinal direction in a horizontal arrangement. Must be transposed into an array.

The driving signal controller 146 of the projection controller 140 receives a transversely transposed image image from the image data processor 144 when a control signal for requesting the projection function is input from the baseband processor 116. The data is transmitted to control the light source system 151 and the diffractive light modulator 153 to generate an image image using the diffracted light.

Meanwhile, the light source system 151 of the light modulating light source system 150 includes a mono light source (for example, a red light source, a green light source, or a blue light source), and collects and emits mono light including a light collecting part (not shown). .

Next, the illumination optical unit 152 converts the light emitted from the light source system 151 into linear parallel light and enters the diffracted light modulator 153.

When the linear parallel light is incident from the illumination optical unit 152, the diffraction type optical modulator 153 generates a video image by performing light modulation to form diffraction light having a plurality of diffraction orders (of course, a plurality of times One or more diffracted light in the diffracted light having a procedural number to generate the image image). An example of such a diffraction type optical modulator 153 is an open hole based diffraction type optical modulator. As shown in FIG. 5, as shown, the open hole based diffraction light modulator used in the present invention is a silicon substrate ( 501, an insulating layer 502, a lower micromirror 503, and a plurality of elements 510a to 510n. Here, although the insulating layer and the lower micromirror are configured as separate layers, if the insulating layer has a property of reflecting light, the insulating layer itself can function as the lower micromirror.

The silicon substrate 501 includes depressions to provide air space to the elements 510a to 510n, an insulating layer 502 is stacked, and a lower micromirror 503 is deposited thereon, and the depressions The lower surfaces of the elements 510a to 510n are attached to both sides that deviate. As the material constituting the silicon substrate 501, a single material such as Si, Al ₂ O ₃ , ZrO ₂ , Quartz, SiO _2, etc. is used. It can also form using.

The lower micromirror 503 is deposited on the silicon substrate 501 and reflects and diffracts incident light. Metal (Al, Pt, Cr, Ag, etc.) may be used as the material used for the lower micromirror 503.

The elements (typically, only the reference numeral 510a is described but the rest are the same) have a ribbon shape, and the bottom surfaces of both ends are recessed of the silicon substrate 501 so that the center portion is spaced apart from the recessed portion of the silicon substrate 501. The lower support part 511a attached to the both side area | regions which deviated from a part is provided.

Piezoelectric layers 520a and 520a 'are provided at both sides of the lower support 511a, and the driving force of the element 510a is provided by contraction and expansion of the provided piezoelectric layers 520a and 520a'.

Examples of the material constituting the lower support 511a include Si oxide (for example, SiO _2, etc.), Si nitride series (for example, Si ₃ N _4, etc.), ceramic substrates (Si, ZrO ₂ , Al ₂ O _3, etc.), Si Carbides and the like. The lower support 511a may be omitted as necessary.

The left and right piezoelectric layers 520a and 520a 'are stacked on the lower electrode layers 521a and 521a' for providing the piezoelectric voltage and the lower electrode layers 521a and 521a 'and contract and expand when voltage is applied to both surfaces. And the upper electrode layers 523a, which are stacked on the piezoelectric material layers 522a and 522a 'that generate the vertical driving force, and provide the piezoelectric voltage to the piezoelectric material layers 522a and 522a'. 523a '). When voltage is applied to the upper electrode layers 523a and 523a 'and the lower electrode layers 521a and 521a', the piezoelectric material layers 522a and 522a 'contract and expand to generate vertical movement of the lower support 511a.

As the electrode material of the electrodes 521a, 521a ', 523a, 523a', Pt, Ta / Pt, Ni, Au, Al, RuO _2, etc. may be used. Deposit.

On the other hand, the upper micro mirror 530a is deposited on the central portion of the lower support 511a and has a plurality of open holes 531a1 to 531a4. Here, the shape of the open holes 531a1 to 531a4 is preferably rectangular, but any closed curve such as circular or elliptical may be used. If the lower supporter is formed of a light reflective material, it is not necessary to deposit the upper micromirror separately, and the lower supporter may function as the upper micromirror.

The open holes 531a1 to 531a4 allow incident light incident on the element 510a to pass through to the lower micromirror 503 corresponding to a portion where the open holes 531a1 to 531a4 are formed. The mirror 503 and the upper micromirror 530a may form pixels.

That is, for example, part (A) of the upper micromirrors 530a having the open holes 531a1 to 531a4 and part (B) of the lower micromirror 503 may form one pixel.

At this time, incident light incident through the portion where the open holes 531a1 to 531a4 of the upper micromirror 530a are formed may be incident on a corresponding portion of the lower micromirror 503, and the upper micromirror 530a and the lower micromirror may be incident. The maximum diffracted light is generated when the interval 503 becomes an odd multiple of lambda / 4.

 The diffractive light modulator uses an open hole-based diffraction light modulator, but a recessed diffraction type optical modulator of Korean Patent Application No. P2004-74875 (US10 / 952556)) and a protruding diffraction type optical modulator may also be used.

In addition, "Diffraction type optical modulator driven at low voltage" of Korean Patent Application No. P2004-77388, "Transmissive piezoelectric thin film optical modulator" of P2004-29928, "Embedded diffraction optical modulator" of P2004-30160, P2004-30161, "Hybrid optical modulator incorporating upper and lower mirrors," "Electrostatic variable diffraction optical modulator and manufacturing method thereof," of P2004-40384, or "Variable diffraction optical modulator" of P2004-40387. Diffraction light modulators disclosed in P2004-40388, "Optical Modulators Using Near Field Applications," and the like can also be used.

Other applications include Silicon Light Machine's GLV, Sony's GLV and Kodak's GEMS.

On the other hand, the Schullen optical unit 154 is preferably composed of a Fourier lens (not shown) and a color filter (not shown), for example, separates the diffracted light by the order and transmits / passes the diffracted light of the desired order. .

The projection and scanning optics 155 project the incident diffracted light onto the screen 160 to generate an image image on the screen 160 for viewing by the viewer.

The optical modulation optical system 150 uses one diffractive optical modulator 153 to generate an image image.

6 is a structural diagram of a projection and scanning optic that projects incident diffracted light onto a screen using a polygon mirror.

Here, the projection and scanning optical unit 155 is composed of a condenser lens 155a, a scanner 155b and a projection lens 155c, and the scanner 155b is incident diffraction under the control of the projection control unit 140. Line scanning is performed on the screen 160 to generate a color image. That is, the projection and scanning optics 155 generates a color image by displaying on the screen 160 while scanning a line image composed of, for example, 1080 pixels, through a plurality of pixels incident through the Schlieren optics 154. .

Here, the condenser lens 155a condenses the diffracted light so that the diffraction beam that has passed through the schlieren optical unit 154 is focused on the screen 160. Of course, a concave lens (not shown) may be further provided after the condenser lens 155a to condense the diffracted beam that has passed through the schlielen optical unit 154, and then may be converted into parallel light and projected onto the scanner 155b.

The scanner 155b is an X-axis scanner and scans the incident line image from the left to the right on the screen 160 under the control of the projection controller 140 as a polygon mirror.

Referring now to Figure 1 below with reference to the operation of the mobile projector according to the present invention in detail.

The base bend processor 116 selects a projection mode in which the user enlarges the image image and projects it on the screen using the key input unit 112 (the projection mode is provided to the user through a menu), and is displayed on the screen 160. When selecting an image to be projected, the control signal is transmitted to the multimedia processor 122 to transmit the image image selected by the user to the projection controller 140.

In addition, the baseband processor 116 transmits a projection mode control signal to the projection controller 140 so that the projection controller 140 transmits a driving signal according to the image image data received from the multimedia processor 122 by the light source system 151. And the diffraction optical modulator 153.

Then, the image input unit 142 of the projection controller 140 receives the image image data from the multimedia processor 122 and transmits the image image data to the image data processor 144, and the image data processor 144 is input from the image input unit 142. The transposed image image data in the longitudinal direction is transmitted to the driving signal controller 146.

On the other hand, when the control signal for performing the projection function from the baseband processor 116 is input, the drive signal controller 146 receives the drive signal according to the image image data input from the image data processor 144 to the diffraction type optical modulator 153. To send).

Then, the diffractive light modulator 153 modulates the light incident from the illumination optical unit 152 to form diffracted light having a plurality of diffraction orders to generate an image image.

The projection and scanning optics 155 may project the image image generated by the diffractive light modulator 153 onto the screen 160 using the polygon mirror.

On the other hand, the present invention described above has been described with respect to the mobile projector built in the portable terminal, it can also be implemented in the external configuration in the same configuration. That is, the connection jack may be externally connected to the multimedia processor and the baseband processor of the portable terminal.

As described above, according to the present invention, when a projector built in or external to a portable terminal is implemented using an optical modulator, a small projector can be implemented to meet the demand of miniaturization of the portable terminal.

In addition, according to the present invention, since the low power diffraction type optical modulator is used, it is possible to meet the low power requirement required in the portable terminal.

Claims (9)

A light modulation optical system that modulates the light emitted from the mono light source provided according to the input drive signal to generate a video image after the driving signal is input, and then enlarges and projects the generated video image on the screen; And And a projection control unit for receiving image image data from a control system of a portable terminal and generating a driving signal according to the input image image data when the control signal is input from the control system and outputting the driving signal to the optical modulation optical system. The method of claim 1, And the optical modulation optical system and the projection control unit are integrated in the portable terminal. The method of claim 1, And the optical modulation optical system and the projection control unit are externally connected to the portable terminal by using a connection jack. The method of claim 1, The optical modulation optical system, A light source system generating and outputting mono light; An optical modulator generating a video image by modulating incident light; An illumination optical unit for injecting light emitted from the light source into the light modulator; And And a projection optical system for generating an image image on the screen by projecting the image image emitted from the light modulator onto the screen using a polygon mirror. The method of claim 4, wherein The optical modulator is a one-panel diffraction type optical modulator to diffract incident light incident from the illumination optical unit to generate an image image with diffracted light, The projection optical system is a mobile projector, characterized in that for generating an image image on the screen by projecting the image image generated by the diffractive optical modulator on the screen. The method of claim 5, The 1 panel diffraction type optical modulator, Board; And a plurality of piezoelectric mirror layers each of which is arranged in an array, each of which is supported by the substrate and is spaced apart from the substrate, and which is diffracted by the light incident from the substrate when the voltage is applied. Mobile projector, characterized in that the mirror. The method of claim 5, The diffraction type optical modulator, Base member; Arranged to form an array, each of which is supported by the base member, an intermediate portion of which is spaced apart from the base member to secure a space, and a surface oriented to the base member is formed as a reflective surface to reflect incident light, A plurality of first reflectors formed with one open hole and configured to pass incident light; A second reflection between the base member and the first reflecting portion, the second reflecting portion being spaced apart from the first reflecting portion to secure a space, and having a reflecting surface reflecting light incident through the open hole of the first reflecting portion; part; And And a plurality of driving means for moving the corresponding intermediate portion of each of the first reflecting portions away from or close to the base member to change the amount of diffracted light formed by the reflected light of the first reflecting portion and the second reflecting portion. Mobile projector, characterized in that the open-hole-based diffractive optical modulator. The method of claim 5, The projection control unit, An image input unit which receives image image data from a multimedia processor of a control system of the portable terminal; An image data processor which processes and outputs an image image received by the image input unit; And And a driving signal controller configured to generate and output a driving signal according to image image data to the diffractive optical modulator when a control signal is input from the baseband processor of the control system. A light modulation optical system that modulates the light emitted from the mono light source provided in response to the input driving signal to generate an image image, and then magnifies the generated image image onto a screen using a polygon mirror to project the generated image image; And a mobile projector comprising a projection control unit for receiving image image data from a control system and generating a driving signal according to the input image image data when the control signal is input from the control system and outputting the driving signal to the optical modulation optical system. .

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