KR0184364B1 - 3d image projector using optical reflective modulator - Google Patents

Abstract

The present invention relates to a projection type stereoscopic image display apparatus using a reflective optical modulator, comprising: a light source for emitting high brightness white light, a light converging means for condensing the emitted light from the light source, and incident light focused by the light converging means; Beam splitting means for splitting the split light beam and the P splitting light beam, first and second light modulating means for optically modulating and reflecting the light separated from the beam splitting means, and the first and second light modulating means. A projection type stereoscopic image display apparatus using a light reflection modulator comprising a projection lens for projecting light reflected and modulated by a screen, comprising: the beam separation means between the first and second light modulation means and the beam separation means; A plurality of microlens array panels for converting the parallel light passing through the beam into a plurality of separated smaller collimation beams, and the collimation beams Color separation means comprising a plurality of pixel stops to pass in parallel and a dichroic mirror alignment panel for separating the focused parallel beams incident through the pixel stops into beams of R, G, and B, respectively. It is configured to have an installed structure to display color stereoscopic images using two reflective optical modulators.

Description

Projection type stereoscopic image display device using reflective optical modulator

1 is a block diagram showing an optical system of a conventional general projection type stereoscopic image display device.

2 is a block diagram showing an optical system of a projection-type stereoscopic image display apparatus using a reflective optical modulator according to the present invention.

3 is an enlarged view showing a reflective optical modulator and color separation means in the projection-type stereoscopic image display device of the present invention.

4 is an enlarged view showing a dichroic mirror arrangement panel in the projection-type stereoscopic image display device of the present invention.

* Explanation of symbols for main parts of the drawings

30: light source 32: light focusing means

34 beam separation means 36 first and second light modulation means

38: projection lens 40: micro lens array panel

42: pixel stop 44: dichroic mirror arrangement panel

46: color separation means 58: λ / 4 plate

The present invention relates to a projection type stereoscopic image display (Projector) using a reflective optical modulator, and more particularly, to a projection type using a reflective optical modulator capable of displaying a color stereoscopic image using two reflective optical modulators. A stereoscopic image display apparatus is provided.

In general, an image display apparatus is classified into a direct image display apparatus and a projection image display apparatus according to a display method.

The direct view image display device includes a CRT (Cathode Ray Tube). The CRT image display device has a good image quality but has a problem such as an increase in weight and thickness as the screen is enlarged, and a high price. There is a limit.

On the other hand, a projection image display apparatus includes a large crystal display (hereinafter referred to as an LCD), and such a large LCD can be reduced in thickness due to the thinness of the LCD, but such an LCD has no light loss due to the polarizing plate. There is a problem in that the efficiency of light is very low because a large thin film transistor for driving an LCD is formed for each pixel and has a limit in increasing the aperture ratio (light transmission area).

Accordingly, a projection image display device using Actuated Mirror Arrays (hereinafter referred to as AMA) has been developed by Aura, USA.

The projection image display device is distinguished from using a one-dimensional AMA and using a two-dimensional AMA, wherein the one-dimensional AMA has mirror surfaces arranged in an M × 1 array, and the two-dimensional AMA has a mirror surface having an M × N array. According to the arrangement, the projection image display device using the 1D AMA pre-scans M x 1 rays using a scanning mirror, and the projection image display device using the 2D AMA projects M x N beams by projecting M x N luminous fluxes. It is intended to represent an image having an array of pixels.

Hereinafter, a conventional projection type stereoscopic image display device will be described.

FIG. 1 is a schematic view of a conventional projection type stereoscopic image display device, and accordingly, the conventional projection image display device 1 includes a light source 11, a source lens 12, a source stop 13, a reflection mirror 14, and a projection. The light source 11 includes a stop 15, a projection lens 16, a dichroic filter 17, 18, a light reflecting member 20, 22, 24, and a field lens 2. White light having high luminance is emitted from the light source, and the light emitted from the light source 11 is focused by the source lens 12 and then transmitted through the source stop 13 and reflected by the reflection mirror 14. .

The light reflected by the reflection mirror 14 is separated into red, blue and green light by dichroic filters 17 and 18, respectively.

The field lens 2 is positioned in front of the light reflection members 20, 22 and 24, which will be described later, and has a large reflection angle so that the light reflected from the dichroic filters 17 and 18 is not lost and the optical path is reduced. Play a role.

The light reflection members 20, 22, and 24 are mirrors (not shown) reflecting the light paths to be adjusted so as to correspond to the pixels incident from the field lens 2, and the mirrors have a predetermined path. Actuators (not shown) are made up of AMAs 20a, 22a, and 24a mounted with M × N pieces. The AMA panels 20a, 22a and 24a are equipped with M x N transistors (not shown), and the actuator is mounted on the AMA panels 20a, 22a and 24a so as to be electrically connected to the transistors. The lens is deformed by the electric field generated by the image signal to incline the mirror mounted thereon by a predetermined angle.

The projection lens 16 projects the light reflected by the light reflecting members 20, 22 and 24 and passed through the projection stop 15 onto the screen.

However, the conventional projection image display device configured as described above is to view the light-modulated image through the light reflecting member through the screen, but the viewer cannot feel a three-dimensional feeling with a flat image.

The present invention has been made to provide a three-dimensional image that could not be implemented in the conventional projection-type image display device as described above, the object of which is a new type of reflection that can display a color stereoscopic image using two reflective optical modulators An object of the present invention is to provide a projection type stereoscopic image display apparatus using a fluorescent modulator.

In order to achieve the above object, the present invention provides a light source for emitting high brightness white light, a light converging means for condensing the emitted light from the light source, and incident light focused by the light converging means. A pan-separation means for separating into beams, first and second light modulating means for light modulating and reflecting light separated from the beam separating means, and light modulated and reflected by the first and second light modulating means. A projection type stereoscopic image display apparatus using a reflective optical modulator consisting of a projection lens for projecting a light into a screen, wherein the parallel light passing through the beam separation means between the first and second light modulation means and the beam separation means is large. A plurality of microlens array panels for converting into two separate smaller collimation beams and a plurality of picks for passing the collimation beams in parallel Characterized the stop and a color separation which is parallel to the incident converging beam stop through the pixel is made up of a dichroic mirror arrangement dichroic panel such that each of R, G, B of the beam separated by means provided.

Hereinafter, a projection type stereoscopic image display apparatus using a reflective optical modulator according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing an optical system of a projection-type stereoscopic image display apparatus using a light reflecting modulator according to the present invention, and according to the present invention, a light source 30 emitting white light having high luminance and light emitted from the stray light source 30 are provided. A light concentrating means (32) for condensing the light, a beam splitting means (34) for separating incident light focused by the light concentrating means (32), and a beam splitting means (34). The first and second light modulation means 36 for light modulating and reflecting the light separated from the light beam), and the projection for projecting the light reflected and modulated by the first and second light modulation means 36 to the screen. A projection type stereoscopic image display apparatus using a reflective optical modulator comprising a lens (38), wherein the beam separation means (34) is disposed between the first and second light modulation means (36) and the beam separation means (34). Parallel light passing through the A plurality of micro lens array panel 40 to be converted to a fast parallel beam, a plurality of pixel stop 42 to pass the parallel collimation beam in parallel, and a parallel collimation incident through the pixel stop 42 It shows that the color separation means 46 is composed of a dichroic mirror arrangement panel 44 for separating the beams into R, G, and B beams, respectively.

In the present invention, the light converging means 32 is an aspheric reflector 48 installed at the rear side of the light source 30, and is installed at a predetermined interval on the light projection direction in front of the light source 30 is the light source 30 And a spherical reflector 50 for reflecting back to the aspheric reflector 48 after being emitted from the predetermined light path, and a light path corresponding to the light source 30 and the spherical reflector 50. It is shown that the light guide 52 is provided on the light guide 52 to be converted into parallel light to the white light reflected from the aspheric reflector 48.

On the other hand, in the present invention, the beam separating means 34 is made of a polarizing beam splitting prism 54, the infrared / ultraviolet cut filter for removing the hot wire from the parallel light on the projection side of the polarizing beam splitting prism 54 56 is provided, and the λ / 4 plate 58 is provided at a position slightly away from the reflection side of the polarization beam separation prism 54.

On the other hand, the color separation means 46 is a plurality of micro to allow the parallel light passing through the beam separation means 34 to be converted into a plurality of separated smaller parallel collimated beams, as shown in FIG. A lens array panel 40, a plurality of pixel stops 42 for passing the collimation parallel beams in parallel, and a collimation parallel beam incident through the pixel stops 42 are beams of R, G and B, respectively. It is composed of a dichroic mirror arrangement panel 44 to be separated.

Meanwhile, the light reflected by the beam separating means 34 is reflected back by the light modulating means 36 between the beam separating means 34 and the projection lens 38, and then the light reflected by the beam separating means 34 is projected. It shows that the field lens 60 for focusing toward the side is installed.

Meanwhile, in the present invention, as shown in FIG. 4, the dichroic mirror arrangement panel 44 constituting the color separating means 46 includes two dichroic filters installed at the center to cross each other ( 62) and two reflective mirrors 64 for reflecting two color components which are separated while passing through the dichroic filter 62 and are separated at right angles with respect to the advancing direction of the incident beam.

Referring to the operation of the three-dimensional image projection image display device according to the present invention configured as described above are as follows.

As shown in FIG. 2, the illumination light from the light source 30 is emitted as parallel light through the aspherical reflector 48, the spherical reflector 50 and the light guide 52 which constitute the light converging means 32, The emitted light is incident into the polarizing beam splitting prism 54 in a state where the heat ray is removed while passing through the infrared / ultraviolet light blocking filter 56 installed on the projection side of the polarizing beam splitting prism 54.

As such, the illumination light incident into the polarization beam separation prism 54 constituting the beam separation means 34 is separated into S waves and P waves, where the S waves are reflected at the separation plane of the polarization beam separation prism 54 and are lambda. After passing through the / 4 plate 58 into a circularly polarized beam, as shown in FIG. 3, the color separation means 46 passes through the plurality of pixel stops 42, and thus As shown in FIG. 4, the beams pass through the dichroic filter 62 and the reflecting mirror 64 constituting the dichroic mirror arrangement panel 44, respectively, having R, G, It is separated in the order of B, R, G, B, --- and reaches the first and second light modulation means 36, which is determined according to the image information loaded in each of the light modulation means 36. The path of the re-reflected beam is adjusted by the tilting reflection angle of the unit pixel of the light modulation means 36.

As shown in FIG. 3, the adjusted beam is passed through the plurality of pixel stops 42, and the amount of light passing through is the right or left image information loaded on the light modulation means 36. After the light is adjusted according to the image information, the light passes through the microlens array panel 40 again to become white light, and then passes through the λ / 4 plate 58 to be changed into a P-polarized light beam. Subsequently, after passing through the beam separation means 34 and the field lens 60 for focusing the projection light, the right or left image information required for the stereoscopic image by the projection lens 38 is P-shaped. Is projected onto the screen.

On the other hand, similarly, the P wave separated while passing through the polarization beam separation prism 54 constituting the beam separation means 34 becomes a beam of circularly polarized light through the λ / 4 plate 58, and at this time, FIG. The color separation means 46 and the light modulating means 36 corresponding to the right side carry the left or right image information for the stereoscopic image information to be reflected on the right side, and continue to pass through the λ / 4 plate 58. After changing to the S wave and reflected from the separation surface of the beam separation means 34, the left or right image information required for the stereoscopic image of the projection lens 38 through the field lens 60 is projected on the screen in the S wave form. Will be.

At this time, when the viewer gazes at the screen with polarized glasses, the right image information can be viewed through the right side and the left image information through the left side, thereby recognizing stereoscopic images.

Claims (3)

A light source 30 for emitting white light of high brightness; Light concentrating means (32) for concentrating radiated light from the light source (30); Beam separating means (34) for separating the incident light focused by the light focusing means (32) into an S-polarized light beam and a P-polarized light beam; First and second light modulating means (36) for modulating and reflecting light separated from the beam separating means (34); A projection type stereoscopic image display using a reflective optical modulator comprising a projection lens (38) for projecting light reflected and modulated by the first and second optical modulation means (36) onto a screen. A plurality of micros such that the parallel light passing through the beam splitting means 34 between the second light modulating means 36 and the beam splitting means 34 is converted into a plurality of separated smaller collimated parallel beams. A lens array panel 40, a plurality of pixel stops 42 for passing the collimation parallel beams in parallel, and a collimation parallel beam incident through the pixel stops 42 are beams of R, G and B, respectively. Projection type stereoscopic image display device using a reflective optical modulator, characterized in that the color separation means 46 is composed of a dichroic mirror arrangement panel 44 to be separated by the installation. The method of claim 1, wherein the beam separation means 34 is made of a polarizing beam splitting prism 54, the infrared / ultraviolet cut filter for removing the hot wire from the parallel light on the projection side of the polarizing beam splitting prism (54) 56) is provided, and? / 4 plate (58) is provided at a position slightly away from the reflection side of the polarization beam split prism (54). 2. The dichroic mirror arrangement panel (44) according to claim 1, further comprising: two dichroic filters (62) installed at the center to cross each other; Projection type using a reflective optical modulator characterized in that it consists of two reflecting mirrors 64 for reflecting two color components separated by passing through the dichroic filter 62 and separated at right angles with respect to the advancing direction of the incident beam. Stereoscopic image display device.