KR100785526B1 - Image display apparatus - Google Patents

Abstract

An image display device is provided to enhance brightness of an image by using plural beams from plural light sources as a single light source. An image display device includes a diode array(30), an emitting array(50) and a scan unit(60). The diode array includes optical units(20), which include plural light sources and constitute a single pixel. The diode array irradiates light according to an input signal. The emitting array is coupled with the optical units using optical cables. The scan unit reflects the light from the emitting array to a screen. The optical unit includes first to third optical units having optical light sources emitting red, blue, and green beams. The optical cable includes a branch, which is coupled with the respective light sources. A main unit is coupled with the branch unit.

Description

Image display apparatus

1 is a perspective view showing an image display device according to the present invention;

2 and 3 are side views showing another embodiment of the image display device according to the present invention;

4 is a perspective view showing another embodiment of an image display device according to the present invention;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus, and more particularly, to an image display apparatus having increased luminance by increasing the amount of light scanned on a screen.

Image display apparatuses for realizing an image include a cathode ray tube (CRT), a plasma display panel (PDP), an LCD, a VFD, an EL, devices using light emitting devices, and a projector. In recent years, such an image display device is required to have a large screen, a thin film, a flat panel, etc. due to the advancement of microelectronics, the expansion of application fields, and the spread of information systems.

In the display device as described above, in order to achieve thinning, flattening, and clear resolution, pixel formation for realizing an image should be simple, as small as possible, and high in luminance. In view of these considerations, since the CRT has a structure in which the electron beam emitted from the electron gun is deflected by the deflection yoke to excite the fluorescent film, it is difficult to miniaturize and thin. The plasma display device, which is attracting attention as a large flat panel display device, has a structure in which an image is formed by exciting phosphors by a mother beam (ultraviolet ray) generated by plasma discharge in a discharge space. Such a plasma display device has a relatively complicated structure for securing a discharge space, and the aperture ratio of the discharge space is reduced by the electrodes. In addition, the LCD and VFD can be flat and thin, but it is difficult to enlarge the size of the LCD. In the case of a projector, a red, green, and blue image is projected onto a screen to realize a color image, so it is difficult to realize a clear image in a place where brightness is relatively low.

A display device in view of the above points is disclosed in Japanese Laid-Open Patent Publication No. 2001-51623.

The disclosed display device includes a plurality of mono light emitting devices each having a plurality of blue, green, and red LEDs mounted on a mounting substrate, and a matrix array of LEDs arranged on an electrode pattern formed on the mounting substrate to selectively emit light to form an image.

The display device as described above is very difficult to manufacture since a plurality of mono light emitting devices each having red, blue, and green LEDs mounted thereon are arranged at predetermined intervals on the mounting substrate. In particular, the LEDs must be planted separately, and the second electrode lead wires are wire-bonded, which is cumbersome and not advantageous for miniaturization and enlargement.

Japanese Unexamined Patent Application Publication No. Hei 8-16114 discloses a light emitting display device using LED, and Japanese Unexamined Patent Application Publication No. Hei 11-186590 discloses a chip type LED.

However, since the device for displaying an image uses LED directly as a pixel, it is difficult to realize a high resolution image and the image display device has to be large to realize a large image.

In view of this point, the image display device disclosed in Japanese Patent Laid-Open No. 13-4950 discloses a plurality of incoherent light sources that emit light in response to an input video signal, and a reduction in the beam of light emitted from the light source. And light collecting means for arranging the beam of light in one axis direction, deflecting means for receiving light from the light collecting means and deflecting the light beam in a direction crossing the one axis direction, and correcting the distortion of the light from the deflecting means to the display surface. And distortion correction means for forming an optical path.

The image display device as described above uses a single LED as a red, green, and blue light emitting source for implementing each pixel, and thus, there is a problem in that the brightness of an image cannot be increased.

In addition, Japanese Laid Open Patent Application JP2005338203 discloses an apparatus and method for forming an image using a laser source.

SUMMARY OF THE INVENTION The present invention has been made to solve the problem, and an object thereof is to provide an image display apparatus which can fundamentally prevent a decrease in luminance caused by using a laser and a light emitting diode as a light source.

Another object of the present invention is to provide an image display device using a plurality of light sources as one pixel, which is guided by an optical cable of each light irradiated from this light source and converges on one focal point or line.

The image display device of the present invention for achieving the above object

A diode array including light source units constituting a pixel and consisting of a plurality of light sources having the same color and radiating light according to an input signal;

An emitting array connected by each of the light source units and the optical cables;

And scanning means for reflecting the light emitted from the emitting array onto the screen.

In the present invention, the waveguide or optical cable connecting the light source unit and the emitting array includes branch parts connected to a plurality of light sources, respectively, and a main part connected to the branch parts. The light source is made of a light emitting diode or a laser diode.

The end of the optical cable which is connected to the light source unit constituting one pixel and constituting the array unit is installed to be inclined so that the light irradiated from each optical cable converges to one point of the light irradiated from the end.

Alternatively, an image display apparatus of the present invention for achieving the above object constitutes one pixel, and includes a first light source unit having a plurality of red (R) light sources and a plurality of green (G) light sources. A diode array comprising a second light source unit, third light source units having a plurality of blue light sources, and a 1.2.3 light source unit each having a light source of blue (B); An emitting array connected to the first, second, and third light source units by a waveguide or an optical cable;

And scanning means having a rotating multi-faceted mirror or a galvano mirror for linearly reflecting the light emitted from the emitting array onto the screen.

In the present invention, further comprising a focusing means for focusing the light irradiated from the respective optical cables on a point on the optical path irradiated from the emitting array to the scanning means.

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

The image display apparatus according to the present invention can increase the luminance of an image by using a plurality of light sources for forming one pixel, and can realize a mono image or a color image. 1 shows an example of an image display apparatus according to the present invention.

Referring to the drawings, the image display apparatus 10 includes a diode array 30 in which light source units 20 having a plurality of light sources are installed to implement a pixel, a light source unit 20, a waveguide, or an optical cable ( 40, the main control unit 100 for displaying the image on the screen 200 according to the transmitted image signal or the image data input to a computer or the like, and the emitting array 50 Scanning means 60 for reflecting the light for forming the image irradiated from the light into the screen 200.

Hereinafter, the components of the image display apparatus will be described in detail.

The diode array 30 includes a holder 31 and light source units 20 installed in the holder 31 to form one pixel. The light source unit 20 includes a plurality of light sources 21, 22, 23, and 24 to prevent the luminance from being lowered when forming one light source, that is, one pixel. The light sources 21-24 may be formed of light emitting diodes, laser diodes, or the like. The light source constituting the light source unit 20 may be formed by being mounted on a circuit board or deposited. Here, the number of light sources forming each light source unit 20 may not be the same and may be formed of a plurality of different light sources. The light source units 20 may be arranged inline. A light concentrator (not shown) for condensing light with an optical fiber may be installed around the light source, which may be integrally formed with a holder or a circuit board.

Waveguides or optical cables 40 connecting each light source unit 20 and the emitting array 50 are branched portions 41-44 connected to the light sources 21-24 of the light source unit 20, respectively. The main part 45 connected with each branch part 41-44 is provided. The optical cable 40 is guided by the light emitted from each light source (21-24) by the branching portion (41-44), the light guided to the main portion 45 connected to the branching portion (41-44). It is guided through. Therefore, since the light generated from the light sources 21-24 constituting the light source unit 20 can be guided through the main unit 45, the amount of light guided through the optical cable 40 connected to the light source unit 20 is increased. You can. That is, the optical cable 40 has a quantity corresponding to the light source unit 20, and collects and guides the light emitted from the plurality of light sources constituting the light source unit 20.

A collimating lens (not shown) is provided between the light sources 21-24 and each branch 41-44 so that light emitted from a light emitting diode or a laser diode, which is a light source, can be focused on the branch of the optical cable 40. It may be further provided.

The emitting array 50 is provided with end portions of the optical cables 50 connected to the respective light source units 20, and a cable holder for supporting the ends of the optical cables 40 in line to form a single scan line. (51) may be further provided, and at the end side of the optical cable (50) supported by the cable holder (51), a focusing lens for focusing the light irradiated from the optical cable (40) to a mirror of a can can means, which will be described later, is further provided. Can be.

The scanning means 60 is for scanning the light emitted from the waveguide or the optical cable 40 of the emitting array 50 to the screen 200, the mirror 61 and for driving the mirror The motor 62 is provided. The mirror 61 may be made of a rotating polyscopy. The rotating mirror may have six, eight, or twelve mirror surfaces, but is not limited thereto. When the rotating polygon mirror is eight angles, a laser beam is projected on the screen 200 from the light source (that is, the light source projected on the rotating mirror mirror) in a transverse length over 90 degrees (viewing angle 90 degrees), and the rotating mirror mirror is 16 degrees. In the case of an angle, a laser beam is projected on the screen 200 by a transverse length over 45 degrees (view angle 45 degrees) from a light source. The number of squares to be manufactured is determined in consideration of the size of the screen, the image to be formed, and the like. In general, the viewing angle is determined by 720 / angle.

On the other hand, between the emitting array 50 and the mirror 61 is further provided with a focusing means 70 for focusing the light emitted from the emitting array 50 to one point of the mirror, as shown in FIG. Can be. The focusing means 70 may be made of a focusing lens 71 having a positive power or a lens having a positive power and a lens having a negative power.

The focusing means is not limited to the above embodiment, but is made up of a flat lens 72 having a plurality of inclined surfaces 73 for converging the light emitted from each optical fiber 40 to one point. Can be. Here, it is preferable that the inclined surface is formed in the opposite direction with respect to the center portion so that the light irradiated from each optical cable can converge at one focal point. In another embodiment of the converging means, the light emitted from the optical cables 40 of the cable holder may be bent so as to be irradiated with a virtual focus.

The main controller 100 may include a communication circuit 110 for receiving data, such as an image or advertisement data, from a transmitted image or a computer, and an image or advertisement content transmitted through the communication circuit 110. Storing the values calculated by the main control unit 120 and the main control unit 120 that calculates changes in color, brightness, and time of a light source, that is, a light emitting diode or a radar diode. The motor controller for controlling the rotation or rotation of the main memory 130 and the mirror 61, and the motor controller for controlling a motor including an encoder, that is, according to data received from the mirror controller 140 and the main controller 120. A signal converter 160 and a light source controller 170 are provided to supply power to the diode array 30. However, the main controller is not limited thereto.

In the image display apparatus according to the present invention configured as described above, the light for forming the pixels from the light source units 20 of the diode array 30 is scanned according to the data generated by the main controller 100. That is, the light emitted from the plurality of light emitting diodes or laser diodes constituting one light source unit 20 passes through the branch portions 41-44 and the main portion 45 of the optical cable 40. ) Is injected. The light scanned by the mirror 61 is reflected by the mirror 61 and scanned by the screen 200 to form an image.

In the process of forming an image as described above, the pixel formed by scanning the screen through the one optical cable 40 is a light source unit 20 is a plurality of light sources, that is, light generated from light emitting diodes or laser diodes Since it is focused, the brightness is relatively high. Therefore, the luminance of the image to be implemented can be relatively increased.

On the other hand, a focusing means (not shown) is installed between the emitting array 50 or the emitting array 50 and the mirror 61, so that the light irradiated from the emitting array 50 is a virtual focal point, that is, The mirror 61 can be converged to. This convergence of the light can reduce the size of the mirror 61, and can reduce the distortion due to the distance difference between the mirror and each pixel during enlargement and reduction.

4 shows another embodiment of an image display device according to the present invention. In the present embodiment, the same reference numerals as the above embodiment indicate the same components.

Referring to the drawings, the image display apparatus is for realizing a color image, and the diode array 80 is red, green, and blue first, second, third light source units 81, 82 for realizing full color pixels. And (83). In addition, the first and second light source units 81 to 83 and the emitter array 50 connected by the optical cable 90 or the waveguide and the light emitted from the emitter array 50 are linearly reflected on the screen. It comprises a scanning means 60 having a rotating mirror or galvano mirror.

The first light source unit 81 of the diode array 80 includes a plurality of light sources R1, R2, R3, and R4 that emit red light, and the second light source unit 82 generates a plurality of green light. The light sources G1, G2, G3, and G4 emit light, and the third light source unit 83 includes a plurality of blue light sources B1, B2, B3, and B4. The optical cables 90 are connected to the first, second, and third light source units 81-83, respectively, and the first branch portions 91a-91d are connected to the light sources constituting the first light source unit 81. And second branch portions 92a to 92d connected to the light sources constituting the second light source unit 82 and having a first main portion 91e connected to the first branch portions. Third branch parts 93a to 93d connected to light sources constituting the first light source unit 83, and second main parts 92e connected to the respective branch parts, and the third branch parts. And third main parts 93e connected to each other. Three optical cables connecting the first, second and third light source units form one pixel for implementing a color image. These first, second, third light source units 81-83 may be installed in a plurality of rows or in an unaligned form in addition to being installed in a line.

On the other hand, the light emitted from the optical fibers supported by the emitting array 50 or between the emitting array 50 and the scanning means is supported by the emitting array 50, that is, the mirror 61. A focusing means (not shown) for focusing at one point and a main control unit 100 for driving the image forming apparatus are installed, and their configuration is substantially the same as the above-described embodiment, and will not be described again.

In the image display apparatus configured as described above, light is scanned onto the mirror 61 from the first, second, and third light source units 81, 82, and 83 for forming one color pixel controlled by the main controller. Here, since the first, second, and third light source units 81, 82, and 83 each include a plurality of light emitting diodes or laser diodes, brightness of light emitted from the first, second, and third light source units may be increased. For example, the first light source unit 81a includes a plurality of light sources R1, R2, R3, and R4 that emit a plurality of red lights, and the light sources R1, R2, R3, and R4 are the first portions of the optical cable 90. The first branch portions 91a-91d are connected to the base portions 91a-91d, and the first branch portions 91a-91d are connected to the main portions, so that the light emitted from each light source can be focused, so that the luminance of the light emitted through the first main portion of the optical cable is reduced. The action of the second and third light source units 82 and 83 is also the same as that of the first light source unit.

The light is reflected by the mirror 61 and scanned on the screen 200 to form an image.

In the process of forming an image as described above, the pixels formed by scanning the screen through the one optical cable 90 are formed by the first, second and third light source units 81-83 having a plurality of light sources, that is, light emitting diodes. Since the light generated from the laser diodes is focused, the brightness is relatively high. In particular, by adjusting the number of light sources constituting the first, second, and second light source units 81, 82, and 83, the difference in light emission intensity of red, green, and blue light emitting diodes or laser diodes is relatively high. By adjusting, the white balance characteristic of the color image can be improved.

As described above, the image display apparatus according to the present invention can increase the luminance of an image by using light irradiated from a plurality of light sources as one pixel. In addition, the color image can be compensated for by increasing the number of light sources that emit relatively poor characteristics.

 Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (11)

A diode array including light source units constituting one pixel with a plurality of light sources and irradiating light according to an input signal; An emitting array connected by each of the light source units and the optical cables; And scanning means for reflecting the light emitted from said emitting array onto a screen.  The method of claim 1, The light source unit constituting the one pixel includes first, second and third light source units having a plurality of light sources for irradiating red (R), green (G), and blue (b) light. The optical cable connecting the light source unit and the emitting array includes branch parts connected to a plurality of light sources constituting the first, second, and third light source units, and a main part connected to the branch parts, respectively. Display. The method according to claim 1 or 2, And the light source comprises a light emitting diode or a laser diode. In claim 1 or 2, And an end portion of the optical cable connected to the light source unit constituting the one pixel and constituting the array unit is inclined so that the light irradiated from each optical cable is focused at a point on the mirror surface of the scanning means. The method of claim 1, And focusing means for converging the light irradiated from each optical cable to a point on the optical path irradiated with the scanning means from the emitting array. The method of claim 5, And said focusing means comprises a focusing lens having a plurality of inclined surfaces for converging the light irradiated from the optical fiber to one point. A single pixel comprises a first light source unit having a plurality of red light sources, a second light source unit having a plurality of green light sources, a third light source unit having a plurality of blue light sources, and a plurality of blue light sources A diode array each having a 1.2.3 light source unit; An emitting array connected to the first, second and third light source units by an optical cable; And a scanning means having a rotating multi-face mirror or a galvano mirror for linearly reflecting the light emitted from the emitting array onto the screen.  The method of claim 7, wherein And the first, second and third light source units are each provided with an optical cable having a branch part connected to the light sources and a main part connected to each branch part. In claim 7 or 8, And an end portion of the optical cable connected to the light source unit constituting the one pixel and constituting the array unit is inclined so that the light irradiated from each optical cable is focused at a point on the mirror surface of the scanning means. The method of claim 7, wherein And focusing means for converging the light irradiated from the respective optical cables to a point on the optical path irradiated with the scanning means from the emitting array. delete

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