KR20050009073A - optical engine in LCD projector - Google Patents

Abstract

PURPOSE: An optical engine of an LCD(Liquid Crystal Display) projector is provided to precisely adjust an optical direction projected into an LCD panel leftward, rightward, upward and downward by installing a projected beam controller. CONSTITUTION: An optical engine contains a thermal absorption/ultraviolet, infrared isolation mirror, a first and a second lighting optical portions, a first to a fifth mirrors, a lighting lens and a projected light controller. The thermal absorption/ultraviolet, infrared isolation mirror penetrates pure visible ray from a light source portion. The first and the second lighting optical portions penetrate the penetrated intensity of the visible ray from the thermal absorption/ultraviolet, infrared isolation mirror by maintaining regularly. The first to the fifth mirrors projects a red, a green and a blue to each LCD panels by partially reflecting and partially projecting the red, the green and the blue among the penetrated visible rays from the first and the second lighting optical portions or by reflecting all. The lighting lens penetrates the blue reflected from one mirror to a general direction by concentrating. The projected light controller stores the lighting lens and moves upward, downward, leftward and rightward for adjusting the penetrating direction of the blue through the lighting lens. The projected light controller contains a first plate(121) to store the lighting lens, a second plate(122) combined with the first plate for vertically move the first plate and a third plate(123) combined with the second plate for horizontally moving the second plate.

Description

Optical engine in LCD projector

The present invention relates to an optical engine of an LCD projector, and more specifically, the direction of incidence of B (blue) of R (red), G (green), and B (blue) incident on the LCD panel is up, down, left The present invention relates to an optical engine of an LCD projector equipped with an incident light control device that adjusts to the right.

As an example of an image projection apparatus, an LCD projector using an LCD, a commercially available flat panel display device, as an image element is most commonly used.

In addition, among LCD projectors, a three-panel LCD projector is recently used, and a three-panel LCD projector uses an optical engine using a three-panel LCD panel.

Hereinafter, an optical engine of a three-panel LCD projector according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram schematically illustrating an optical engine of an LCD projector to which an incident light control device according to the prior art is applied, and FIG. 2 is an exploded perspective view of the incident light control device according to the prior art.

As shown in FIG. 1, the optical engine of the LCD projector to which the incident light control device 20 according to the prior art is applied includes a light source unit including a lamp 1 and a reflector 2, and a heat absorption / red / ultraviolet ray blocking mirror ( 3), the first and second illumination optical units 4 and 5, the first to fifth mirrors 6 to 10, and the first and second illumination lenses 11 and 12 which focus and transmit the transmitted light in a predetermined direction. ), An R (red), G (green), B (blue) three-panel LCD panel 13, and an engine base 14 (see Fig. 2) in which the above components are installed.

The heat absorption / red / ultraviolet ray blocking mirror 3 transmits only pure visible light from the light source unit, and the first and second illumination optical units 4 and 5 transmit the heat absorption / red / ultraviolet blocking mirror 3. The amount of visible light transmitted from the light is kept constant and transmitted.

The first mirror 6 reflects R (red) in the visible light transmitted from the first and second illumination optical units 4 and 5, and transmits G (green) and B (blue).

In addition, the second mirror 7 reflects G (green) out of G (green) and B (blue) transmitted from the first mirror 6 and enters the G (green) side LCD panel, and B (Blue) transmits.

The third mirror 8 reflects B (blue) transmitted by the second mirror 7, collected by the first illumination lens 11, and transmitted to the second illumination lens 12.

In addition, the fourth mirror 9 is reflected from the third mirror 8 and is reflected by the second illumination lens 12 and is reflected by B (blue) transmitted through the B (blue) side LCD panel Let's do it.

The fifth mirror 10 reflects R (red) reflected from the first mirror 6 and enters the R (red) side LCD panel.

On the other hand, the incident light control device 20 is provided on the fourth mirror 9 side to adjust the incident direction of B (blue) reflected from the fourth mirror 9 and incident on the B (blue) side LCD panel. do.

As shown in FIG. 2, the incident light control device 20 includes a plate 25 having a mirror fastening portion 21 bent at a side end and a guide portion 22 protruding rearwardly on an upper portion thereof, and the plate 25. 25 is comprised by the fastening part of the engine base 14 fastened and installed by the screw S. As shown in FIG.

Here, the guide portion 22 is formed with a guide hole 22a, and the engaging portion of the engine base 14 is formed with a projection 14a inserted into the guide hole 22a.

Accordingly, the plate 25 is inserted into and supported by the mirror fastening portion 21 so that the plate 25 is formed in the guide hole 22a formed in the guide portion 22 of the engine base 14. The protrusion 14a formed in the fastening part is fastened through the screw S to the fastening part of the engine base 14.

At this time, the screw 25 is loosened so that the plate 25 can be moved to the left and right by interacting with the guide hole 22a formed in the guide part 22 and the fastening part protrusion 14a of the engine base 14. Tighten and install the plate 25 to the engine base 14 by tightening.

In order to adjust the light direction of B (blue) incident on the B (blue) side LCD panel from the optical engine of the LCD projector configured as described above, the engine base 14 is moved by moving the plate 25 left and right. The plate 25 is moved by the guide of the guide hole 22a with respect to the protrusion 14a formed at the fastening portion of the plate, so that the fourth mirror 9 installed on the plate 25 is moved together left and right to form the first mirror. The light direction of B (blue) reflected by the four mirrors 9 was adjusted left and right.

However, in the above-described light direction adjustment process, in order to adjust the light direction of B (blue), it is difficult to precisely adjust because the plate 25 itself on which the fourth mirror 9 is installed must be moved directly to the left and the right. When trying to adjust the light direction up and down there was a problem that the adjustment itself is difficult.

The present invention has been made in order to solve the above problems, the LCD is provided with an incident light control device that can adjust the light direction incident to the LCD panel precisely left and right, as well as up and down precisely. The purpose is to provide an optical engine for the projector.

1 is a schematic view showing an optical engine of an LCD projector to which an incident light control device according to the prior art is applied;

Figure 2 is an exploded perspective view showing an incident light control device according to the prior art

3 is a schematic view showing an optical engine of an LCD projector to which an incident light control device according to the present invention is applied;

Figure 4 is an exploded perspective view showing a coupling structure of the incident light control device according to the present invention

Figure 5 is a perspective view showing a combined state of the incident light control device according to the present invention

Explanation of symbols on the main parts of the drawings

101: Lamp 102: Reflector

103: Heat absorption / infrared rays blocking mirror 104, 105: First and second illumination optics

106 to 110: first to fifth mirrors 111 and 112: first and second illumination lenses

113: 3-plate LCD panel 114: Clip

120: incident light control device 121: first plate

121a: lens seat 121b: top and bottom guide holes

121c: First upper and lower operation piece 121d: Clip protrusion

122: second plate 122a: front projection

122b: 2nd up-down operation piece 122c: 1st left-right operation piece

122d: rear projection 123: third plate

123a: left and right guide holes 123b: second right and left operation piece

S: Screw

In order to achieve the above object, the present invention provides an optical engine of an LCD projector having a light source unit consisting of a lamp and a reflector; A heat absorption / red / ultraviolet ray blocking mirror for transmitting only pure visible light from the light source unit; First and second illumination optics configured to transmit and maintain a constant amount of visible light transmitted from the heat absorption / red / ultraviolet light blocking mirror; Part of R (red), G (green), and B (blue) reflects and partially transmits or reflects all of the visible light transmitted from the first and second illumination optical units, and the R (red) First to fifth mirrors for causing G (green) and B (blue) to enter each LCD panel; An illumination lens for condensing B (blue) reflected from one of the first to fifth mirrors in a predetermined direction; And an incident light control device which accommodates the illumination lens and moves up, down, left, and right to adjust the transmission direction of B (blue) transmitted through the illumination lens. To provide.

Hereinafter, an optical engine of an LCD projector according to the present invention will be described with reference to the accompanying drawings.

3 is a schematic view showing an optical engine of an LCD projector to which an incident light control device according to the present invention is applied, FIG. 4 is an exploded perspective view showing a coupling structure of the incident light control device according to the present invention, and FIG. The perspective view showing the coupled state of the incident light control device according to.

As shown in FIG. 3, the optical engine of the LCD projector according to the present invention also has a light source unit consisting of a lamp 101 and a reflector 102, a heat absorption / red / ultraviolet ray blocking mirror 103, The first and second illumination optics 104 and 105, the first to fifth mirrors 106 to 110, the first and second illumination lenses 111 and 112 for condensing and transmitting the transmitted light in a predetermined direction, and R It consists of a 3-plate LCD panel 113 of (red), G (green), and B (blue), and an engine base (not shown) in which each said component is installed.

However, in the optical engine of the LCD projector according to the present invention, the incident light control apparatus 120 capable of precisely adjusting the light direction of B (blue) incident to the B (blue) side LCD panel independently left, right, or up and down. Is provided.

That is, as shown in FIG. 4, the incident light control device 120 includes a first plate 121 in which the second illumination lens 112 is accommodated, and a screw S on the front surface of the first plate 121. The lens cover 124 is fastened by the second plate 122, the first plate 121 is coupled so as to move up and down, and the second plate 122 is coupled so as to be movable left and right It is composed of a third plate 123 is installed in the engine base.

Here, the first plate 121 has a lens mounting portion 121a in which the second illumination lens 112 is accommodated, and a vertical guide hole extending vertically up and down around the lens mounting portion 121a. 121b is formed, and a first vertical operating piece 121c protruding forward is formed at an upper end thereof.

In addition, the second plate 122 has a protrusion 122a corresponding to the upper and lower guide holes 121b inserted into a front surface thereof, and protrudes forward at an upper end thereof so that the first upper and lower operating pieces 121c and the screw S are formed. The second upper and lower operating pieces 122b are connected and supported by (), the first left and right operating pieces 122c protruding forward at the left end are formed, and the protrusions 122d are formed at the upper back side.

In addition, the third plate 123 has a protrusion 122d formed on an upper side of the rear surface of the second plate 122 and is inserted and supported, and left and right guide holes 123a having a long shape are formed, and the front end is provided at the left end. The second left and right operating piece (123b) is formed to protrude and are supported by the first left and right operating piece (122c) and the screw (S).

On the other hand, the coupling process and operation of the incident light control device configured as described above will be described.

In order to install the incident light control device according to the present invention on the engine base, first, the second illumination lens 112 is coupled to the lens seating portion 121a of the first plate 121, and the lens cover 124 is attached to the first lens 121. 1 Fasten the screws (S) to the front of the plate 121.

In addition, the second plate 122 is coupled to the first plate 121 such that the protrusion 122a formed on the front surface of the second plate 122 is inserted into the upper and lower guide holes 121b of the first plate 121. Next, the first upper and lower operating pieces 121c formed at the upper end of the first plate 121 and the second upper and lower operating pieces 122b formed at the upper end of the second plate 122 are fastened by screws S. Connect.

Next, the third plate 123 is inserted into the second plate 122 such that the protrusion 122d formed on the rear surface of the second plate 122 is inserted into the left and right guide holes 123a of the third plate 123. After coupling, the first left and right operating piece 122c formed at the left end of the second plate 122 and the second left and right operating piece 123b formed at the left end of the third plate 123 are attached to the screw S. FIG. Connect by tightening.

Next, by inserting the clip 114 into the clip protrusion 121d formed at the front side end of the first plate 121, the coupling process of the incident light control device 120 according to the present invention is shown in FIG. Is completed as.

Finally, the incident light control device 120 assembled as described above is installed on the engine base, but only the third plate 123 is installed so as to be fixed to the engine base, the installation process of the incident light control device 120 according to the present invention Is complete.

Referring to the incident light direction adjustment process of the combined incident light control device as described above is as follows.

In order to adjust the light direction of B (blue) incident to the B (blue) side LCD panel from the optical engine of the LCD projector provided with the incident light control device 120 to the left and right, the first plate of the second plate 122 When the screws S connecting the left and right operating pieces 122c and the second left and right operating pieces 123b of the third plate 123 are tightened, the third plate 123 is fixed to the engine base and thus the second plate. The 122 moves to the left side, and when the screw S is loosened again, the second plate 122 moves to the right side.

Therefore, the light projection direction of the second illumination lens 112 coupled to the first plate 121 is adjusted to the left and right, so that the light direction reflected from the fourth mirror 109 is also adjusted to the left and right, The light direction of B (blue) incident on the B (blue) side LCD panel is precisely adjusted left and right by the moving distance of the screw S. FIG.

In addition, in order to adjust the light direction of B (blue) incident on the B (blue) side LCD panel up and down, the first upper and lower operating pieces 121c of the first plate 121 and the second plate ( When the screw S connecting the second upper and lower operating pieces 122b of 122 is tightened, the second plate 122 is fixed to the third plate 123, so that the first plate 121 moves upward. When the screw S is loosened again, the first plate 121 is moved downward.

Therefore, the light projection direction of the second illumination lens 112 coupled to the first plate 121 is adjusted up and down, and thus the light direction reflected from the fourth mirror 109 is adjusted up and down, The light direction of B (blue) incident on the B (blue) side LCD panel is precisely adjusted up and down by the moving distance of the screw S. FIG.

As described above, the present invention deviates from the method of adjusting the light direction of B (blue) incident to the conventional B (blue) side LCD panel only by the reflection mirror to the left and right, thereby fixing the reflection mirror and illuminating the illumination lens. Can be adjusted left, right or up and down independently, and fine adjustment is possible by the moving distance of the screw, so that the light direction is more precisely adjusted to improve image quality and to reduce defects caused by errors in optical parts. have.

In addition, by adjusting the light direction by tightening and loosening the screw, the operation method for the adjustment is simple, thereby reducing the work time required for the light direction adjustment.

Claims (4)

In the optical engine of the LCD projector having a light source unit consisting of a lamp and a reflector, A heat absorption / red / ultraviolet ray blocking mirror for transmitting only pure visible light from the light source unit; First and second illumination optics configured to transmit and maintain a constant amount of visible light transmitted from the heat absorption / red / ultraviolet light blocking mirror; Part of R (red), G (green), and B (blue) reflects and partially transmits or reflects all of the visible light transmitted from the first and second illumination optical units, and the R (red) First to fifth mirrors for causing G (green) and B (blue) to enter each LCD panel; An illumination lens for condensing B (blue) reflected from one of the first to fifth mirrors in a predetermined direction; And an incident light control device which accommodates the illumination lens and moves up, down, left, and right to adjust the transmission direction of B (blue) transmitted through the illumination lens. . The method of claim 1, The incident light control device, A first plate accommodating the illumination lens; A second plate coupled to the first plate such that the first plate is movable up and down; And a third plate coupled to the second plate such that the second plate is movable left and right. The method of claim 2, The first plate, the upper and lower guide hole is formed on one side, the first vertical operation piece is formed on one side end; The second plate, a projection is inserted into the guide hole in the front surface is formed, the second vertical operation piece is connected to the first vertical operation piece and the fastening member of the first plate is formed, the first end on one side Left and right operating pieces are formed, and projections are formed on the rear surface; The third plate may include a left and right guide hole in which a protrusion formed on a rear surface of the second plate is inserted and supported, and a second left and right operating piece connected to the first left and right operating piece of the second plate by a fastening member. An optical engine for an LCD projector. The method of claim 2, The optical engine of the LCD projector, characterized in that the lens cover is installed on the front of the first plate.