KR19990041487U - Lamp Assembly Positioning Device for AMA Projector - Google Patents

Abstract

The present invention discloses an AMA projector positioning device designed to change the position of a lamp assembly suitable for various tilting angle settings of an AMA module.

According to the present invention, a cam plate having a plurality of cam curves perforated is fixedly installed at one end of a cage, and a plate having a boss inserted into the cam curve is coupled to the cam plate, and corresponding to the AMA module assembly on the plate. Lamp assemblies, barrel lamps, source mirrors are installed.

Therefore, according to the present invention, the position of the lamp assembly and the related member can be easily adjusted in response to various tilting angles of the AMA module assembly, thereby improving the convenience of the assembly process.

Description

Lamp Assembly Positioning Device for AMA Projector

The present invention relates to a projector using an actuated mirror array (AMA), and more particularly, an AMA designed to change the position of a lamp assembly suitable for various tilt angle settings of an AMA module. A lamp assembly positioning device of a projector.

In general, a device for projecting optical energy onto a screen includes a direct-view image display device and a projection-type image display device according to a method of displaying optical energy on a screen. type image display device).

An example of a direct-view image display apparatus is a cathode ray tube (CRT), which is a so-called CRT device, which has excellent image quality but increases in weight and volume as the size of the screen increases, leading to an increase in manufacturing cost. There is.

Projection type image display devices are referred to as liquid crystal displays (hereinafter referred to as LCDs), deformable mirror devices (hereinafter referred to as DMDs), and actuated mirror arrays (hereinafter referred to as AMAs). ).

Since the LCD has a very simple optical structure, it can be thinly formed to reduce the weight and the volume. However, due to the polarity of light, the light efficiency is low, and there is a problem inherent in the liquid crystal material, for example, a slow response speed and a disadvantage in that the inside is easily overheated. In addition, the maximum light efficiency of existing transmission light modulators is limited to a range of 1 to 2% and requires dark room conditions to provide acceptable display quality.

Optical modulators such as DMD and AMA have been developed to solve the problems of the aforementioned LCD type optical modulators.

DMD shows a relatively good light efficiency of about 5%, but serious fatigue problems are caused by the hinge structure employed in the DMD. In addition, there is a disadvantage that a very complicated and expensive driving circuit is required.

In contrast, AMA is a piezoelectrically driven mirror array that provides light efficiency of 10% or more. In an AMA light modulator, each actuator generates a deformation in accordance with an electric field generated by an applied electric image signal and a bias voltage. When the actuator causes deformation, each of the mirrors mounted on the actuator is inclined to reflect the light incident from the light source at a predetermined angle.

The AMA optical modulator has a simple structure and operation principle, and can obtain high light efficiency compared to LCD or DMD. It also provides enough contrast to provide a bright and clear image under normal room temperature light conditions. Moreover, it is not only affected by the polarity of the incident light, but also by the polarity of the reflected light. In addition, the reflective properties of the AMA are relatively less sensitive to temperature, which has the advantage of improving the brightness of the screen compared to other devices that are easily affected by high power light sources.

A projection type image display apparatus using such an AMA is disclosed in Korean Patent Application No. 95-13358 filed by the present applicant on May 26, 1995.

FIG. 1 is a plan view showing a projector applied to a projection image display apparatus filed by the present applicant, and FIG. 2 is a front view of FIG.

As shown, the previously filed projector includes a lamp assembly 1 for radiating high-brightness white light, a barrel lamp 3 for paralleling the beams radiated from the lamp assembly 1, and the lamp assembly 2. Source stops (4) with holes formed to determine the amount of light radiated from the source, source mirrors (6) for reflecting light beams passing through the source stop (4) toward the AMA module assembly (5), and white light A dichroic filter (2), which splits into beams and reflects or transmits to each AMA module assembly (5), an AMA module assembly (5) that changes the light path of the main beam incident upon actuation on the piezoelectric actuator, A projection stop (not shown in the figure) that limits the transmission of the adjusted main beams, a barrel 7 for allowing the transmitted main beams to be synthesized and projected in the direction of the screen, and a cage for embedding these components 8 It consists of).

The projector emits high-brightness light from the lamp assembly 1, is concentrated by parallel light while passing through the barrel lamp 3, and then is irradiated onto the surface of the source mirror 6 through the hole of the source stop 4. . The white light reflected by the source mirror 6 passes through the dichroic filter 2 and is separated into the main beams of R, G, and B according to the wavelength and incident on the respective AMA module assemblies 5.

The AMA module assembly 5 changes the path of the incident main beam at an inclination at a predetermined driving angle according to the electrical signal applied by the M × N matrix array piezoelectric actuators and reflects them in the projection stop direction. On the other hand, the main beams whose paths are changed in pixel units pass through the opening of the projection stop to control the amount of transmission of the main beams. That is, the flux of the main beam passing through the opening of the projection stop is controlled by the direction of the piezoelectric actuator relative to the projection stop to form the unit pixel. The main beams passing through the projection stop are projected onto the screen through the projection lens to realize a large screen image.

Meanwhile, the piezoelectric actuator embedded in the AMA module assembly 5 can be manufactured to have various tilting angles by controlling the thickness and stress of the multilayer thin film layer. Thus, by changing various tilting angles, the AMA module manufacturing process can be improved and further improved. Furthermore, the characteristics of the projector can be adjusted. Such various changes in the piezoelectric actuator tilting angles involve a change in the incident optical axis, which makes it necessary to position the associated lens including the lamp assembly 1.

However, in the conventional projector, the lamp assembly 1 is fixedly installed at the side of the cage 8, and the barrel lamp 3, the source mirror 6, etc., which need to change the installation position and angle according to the change of the actuator tilting angle. Since it is fixed, it has been cumbersome to change the mounting position of the cage 8 and related parts in order to align with the AMA module assembly 5 comprising an actuator manufactured at any tilting angle.

Accordingly, the present invention is to solve this problem, and the lamp assembly positioning device of the AMA projector that can change the position of the lamp assembly and the associated members corresponding to the AMA module assembly including an actuator having various tilting angles. The purpose is to provide.

The present invention for realizing the above object is an AMA projector using the AMA module assembly, the cam plate having a plurality of cam curves perforated fixedly installed at one end of the cage, the boss is inserted into the cam curve on the cam plate And a lamp assembly, a barrel lamp, and a source mirror are installed on the plate to correspond to the AMA module assembly, and the cam curve corresponds to the AMA module assembly having the arbitrary tilting angle. Provided is a lamp assembly position adjusting device of an AMA projector which is formed so that a lamp and a source mirror can be set at a desired position.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a plan view showing a conventional AMA projector,

2 is a front view showing a conventional AMA projector,

Figure 3 is a partially enlarged plan view showing a lamp assembly position adjusting device of the AMA projector according to the present invention,

4 is a cross-sectional view taken along line II ′ of FIG. 3 showing a lamp assembly position adjusting device of an AMA projector according to the present invention;

5 is a cross-sectional view showing a lamp assembly fixing structure according to the present invention.

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

10; Cage 12; Barrel

14; Lamp assembly 16; Cam plate

18; Plate 20; Cam curve

22; Boss 24; AMA module assembly

26; Screw 28; Graduation

30; Barrel lamps 32; Source stop

34; Source mirror 36; Dichroic filter

38; Adjustable screw

Hereinafter, a preferred embodiment of the lamp assembly position adjusting device of the AMA projector according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a partially enlarged plan view showing a lamp assembly position adjusting device of the AMA projector according to the present invention, Figure 4 is a cross-sectional view taken along line II 'showing the lamp assembly position adjusting device of the AMA projector according to the present invention, 5 is a cross-sectional view showing a lamp assembly fixing structure according to the present invention.

As shown, the projector according to the present invention consists of a cage (10) in which the inner space is sealed to form a dark room. A barrel 12 having a plurality of projection lenses mounted on a front surface thereof in the longitudinal direction of the cage 10 is installed, and a lamp assembly 14 for radiating white light having luminance is installed at one side thereof.

The lamp assembly 14 is installed to enable position adjustment on the cam plate 16 fixed to one end of the cage 10. That is, a plurality of cam curves 20 are punctured in the cam plate 16, and a plate 18 having bosses 22 inserted into the cam curves 20 is formed on the cam plate 16. The lamp assembly 14 is installed thereon.

The cam curve 20 of the lamp assembly 14 is adapted to match the respective optical axis of the main beam to be radiated corresponding to the AMA module assembly 24 in which the tilt angle varies in various ways. It is designed to adjust sequentially along the trajectory of the position change.

The boss 22 has a hole formed in the central portion in the longitudinal direction to be fastened by a screw 26 to adjust the position of the lamp assembly 14 on the cam plate 16 and then fix it. .

On the cam plate 16 a scale 28 is formed for setting the position of the lamp assembly 14 according to the various tilting angles of the AMA module assembly 24.

Preferably, the adjusting screw 38 is installed to adjust the position of the plate 18. That is, the adjustment screw 38 is screwed with the plate 18 is installed, the end of the adjustment screw 38 is supported on one end of the cage 10 by the rotation of the adjustment screw 38 of the plate 18 It is configured to be movable.

Meanwhile, on the plate 18, the barrel lamp 30, the source stop 32, and the source mirror 34 as well as the lamp assembly 14 may be installed to flow together. That is, a barrel lamp 30 for parallelizing the light rays radiated from the lamp and a source stop 32 formed with a hole to determine the amount of the light rays are provided in front of the lamp assembly 14. A source mirror 34 is provided for reflecting light rays passing through the stop 32 toward the AMA module assembly 24.

Meanwhile, an AMA module assembly 24 for arranging optical paths of R, G, and B main beams is arranged in the inner space of the cage 10, and white light is provided between the source mirror 34 and the AMA module assembly 24. A dichroic filter 36 is provided for color separation into the main beam and reflecting back to each AMA module assembly 24.

The lamp assembly positioning device of the projector according to the present invention having such a configuration can be easily responded by changing the position of the lamp and the related member according to various tilting angles of the AMA module assembly 24 mounted inside the cage 10. Can be.

Typically, the tilt angle of the AMA module assembly 24 is manufactured in a variety of settings within a range between 0 and 5 degrees. As such, the AMA module assembly 24 having any tilting angle is mounted inside the cage 10 and the plate 18 is moved to match the scale 28 corresponding to any tilting angle. At this time, the plate 18 moves the boss 22 along the cam curve 20 of the cam plate 16. The cam curve 20 may be adapted to match the optical axis of the main beam, which is radiated in correspondence with the AMA module assembly 24 in which the tilt angle varies in advance, to the respective AMA module assemblies 24. ) Is designed to be adjusted sequentially along the trajectory of the change in position, and since the scale 28 corresponding to the tilting angle of the AMA module assembly 24 is formed on the cam plate 16, the position can be easily adjusted. have.

Meanwhile, as mentioned above, not only the lamp assembly 14 but also related members such as the barrel lamp 30, the source stop 32, and the source mirror 34 are installed together on the plate 18 to provide the lamp assembly 14. At the same time as adjusting the position of the).

In this way, the position of the lamp assembly 14 and the related member is set, and then a screw is inserted into the hole of the boss 22 and fastened to fix the plate 18 on the cam plate 16.

The embodiments described above are merely illustrative of one preferred embodiment of the present invention, and the scope of the present invention is not limited to the above, and may be appropriately changed within the scope of the same idea.

Therefore, according to the present invention, the position of the lamp assembly and the related member can be easily adjusted in response to various tilting angles of the AMA module assembly, thereby improving the convenience of the assembly process.

Claims (4)

An AMA projector using an AMA module assembly, comprising: a cam plate formed with a plurality of cam curves perforated at one end of a cage; a plate having a boss inserted into the cam curve formed on the cam plate; A lamp assembly, a barrel lamp, and a source mirror are installed at the lamp assembly, a barrel lamp, and a source mirror so as to correspond to the AMA module assembly, and the cam curve corresponds to the AMA module assembly having the arbitrary tilting angle. A lamp assembly positioning device of the AMA projector is formed to be. The apparatus of claim 1, wherein the cam curve is formed along a trajectory of the lamp assembly which is changed in position to correspond to the AMA module assembly having various tilting angles. The AMA projector according to claim 1, wherein the boss is formed to be fastened by a screw so that a hole is formed at a central portion in the longitudinal direction to adjust the position of the lamp assembly on the cam plate and then fix the position of the lamp assembly. Lamp assembly positioning device. The lamp assembly position adjusting apparatus of claim 1, wherein an adjustment screw is installed to be screwed with the plate, and an end thereof is supported at one end of the cage to adjust the movement of the plate.