JP3922647B2 - Rear projection video device - Google Patents

Description

  The present invention includes a video device capable of projecting light by projecting light from the back of the screen, such as a video device including a liquid crystal display unit (hereinafter referred to as LCD) inside, an optical unit including a projection lens, a light source, a mirror, and the like. The present invention relates to a light source used in a liquid crystal rear projection television receiver (hereinafter referred to as a liquid crystal rear projection television) that is equipped and has a screen attached to the front side of the upper part.

  A rear projection type video apparatus in the prior art, for example, a liquid crystal rear projection television, can be made larger than a television receiver using a cathode ray tube because it can reduce the depth and widen the screen. For example, as shown in FIG. Is well known as a conventional example.

  As shown in FIG. 6, the liquid crystal rear projection television 1 is composed of an upper cabinet 2 and a lower cabinet 3, and a screen 4 disposed on the front side inside the upper cabinet 2, and a light beam of video on the screen 4. It has a structure provided with a mirror 5 for irradiation.

  The lower cabinet 3 includes an optical unit 7 having a projection lens 6, a lamp house unit 8 having a light source for irradiating the optical unit 7 with light, and a control unit (not shown) for controlling the optical unit 7. It has a provided structure.

  Although not shown, the lamp house unit 8 has a built-in lamp for generating light, and the built-in lamp generates high heat. Therefore, the lamp house unit 8 is stored from the rear side of the liquid crystal rear projection television and can be easily replaced. In this way, the safety of LCD rear projection TV users is ensured.

  However, the storage structure of the lamp house of the liquid crystal rear projection television in the above-described prior art is a structure that is inserted and removed from the rear side of the television receiver. And since it has a structure that cannot be easily replaced, a problem has been pointed out that the work of replacing the lamp in the enlarged rear projection type video apparatus is complicated.

  Also, unlike television receivers using cathode ray tubes, the lamps used in back-illuminated video devices themselves have a short lifespan. If the lamp burns out, the video can no longer be used completely, and recovery takes time. It has also been pointed out that the reliability is greatly reduced.

  In addition, even if the lamp is burned out, it has a structure that cannot be easily removed because of the high heat generated, so it must be replaced by a specialist every time the lamp burns. There is also a problem that it takes a long time for the restoration work, and it takes a long time for the video to be viewed to be lost as compared with a television receiver using a cathode ray tube.

  Accordingly, there is a problem that must be solved by replacing a lamp having a lifetime that is used as a light source essential for a rear projection type video apparatus that can be easily increased in size.

In order to solve the problems of the conventional example, a rear projection type video apparatus according to the present invention is a rear projection type video apparatus having a lamp house having a light source for projecting light from the back of a screen, and has a rectangular frame shape. An upper cabinet formed into a box shape in which the inside is hollow as a whole by the front surface portion, the top surface wall portion, the both side surface wall portions, the back surface wall portion, and the bottom surface wall portion, and the periphery is sealed except for the front surface portion, A lower cabinet disposed on the lower side of the upper cabinet, a screen forming the screen provided on the front surface of the upper cabinet in the frame shape, a mirror provided in the upper cabinet, and a front surface of the lower cabinet. provided, from the front of the lower cabinet, and a lamp house accommodation portion for accommodating the lamp house, the lamp house, small Kutomo one surface is formed of a heat-insulating member, said has a handle integrally formed with a heat insulating member, detachably to the lamp house accommodation portion from the front direction of the apparatus main body by the handle on the one side It is attached.

  By adopting such a configuration, it becomes possible to replace the lamp of the rear projection type video apparatus which is increased in size from the front side, and the apparatus itself can be replaced without moving each time.

  In addition, since the lamp house is provided on the front surface and can be replaced, if a spare lamp house is prepared, the lamp house can be immediately replaced when the lamp is burned out.

  Furthermore, the structure provided with the handle of the heat insulating member makes it possible to easily replace the lamp even if it is a so-called amateur who has no specialized technique when the lamp is burned out.

  The rear projection type video apparatus according to the present invention is such that a lamp house provided with a light source for projecting light from the back of the screen is attached to be replaceable from the front side of the apparatus, so that the apparatus itself can be replaced. There is an effect that the projection lamp can be exchanged from the front side without moving the lens.

In addition, the lamp house has an effect that a lamp that generates high heat can be safely handled by forming a net around the light source and providing a handle on a surface formed of a heat insulating member. is there.

  Next, an embodiment of a liquid crystal rear projection television will be described in detail below with reference to the drawings for a back-illuminated video device according to the present invention. In addition, the same number is given and demonstrated to make it easy to understand the same thing as a prior art.

  As shown in FIGS. 1 and 2, the liquid crystal rear projection television 1A includes an upper cabinet 2A and a lower cabinet 3A.

  The upper cabinet 2A has a rectangular frame portion 10 formed on the front side thereof, and a screen 4A is attached to the frame portion 10. As shown in FIG. 2, the top wall 11, the side walls 12, the back wall 13, and the bottom wall 14 are formed into a box shape having a hollow interior and sealed around the inside. A mirror 5A is attached via a pedestal.

  The lower cabinet 3A is equipped with all necessary equipment as the liquid crystal rear projection television 1A except for the screen 4A and the mirror 5A provided in the upper cabinet 2A. For example, an optical unit 7A provided with a video device including a LCD and a drive circuit as a main component and a projection lens is disposed in a substantially central portion.

  A light source unit 15 and a speaker 16 are disposed at a position on the right side (right side when viewed from the front in this embodiment) of the lower cabinet 3A shown in FIG. The structure is covered with a blindfold first grill 18a.

  The LCD includes a projection lens, and is generally used as a so-called optical unit 7A that can control RGB color densities, and a drive circuit includes, for example, a plurality of necessary electronic components on a printed circuit board. The one equipped with is adopted. As the light source, for example, a high-performance light-intensity discharge lamp (in the embodiment, HID lamp / 100 W) is used, the whole is a cartridge type, and the lamp is provided with a lamp from the front side of the liquid crystal rear projection television 1A main body Each house can be easily exchanged.

  A speaker 16 and an air intake port 17 for cooling the internal optical unit 7A (see FIG. 2) are provided on the left side of the front side of the lower cabinet 3A. The second grille 18b has a blindfold. Although not shown, the air from the air intake port 17 is blown by a fan provided therein to cool the optical unit 7A.

  On the front side of the lower cabinet 3A, an operation panel 19 is attached at a position slightly to the right of the center, so that various operations can be performed manually and also by remote control.

  In this way, the light source unit 15, the speaker 16, and the air intake port 17 were entirely covered and blinded by the cosmetic first and second grilles 18a and 18b that were detachably disposed on the front side. It is in a state and has a good appearance.

  On the other hand, the light source of the light source unit 15 can be easily replaced by removing the first and second grilles 18a and 18b on the front side without shifting or moving the position where the liquid crystal rear projection television 1A is installed. In addition, the filter of the air intake port 17 can be easily replaced.

  As shown in FIG. 3, the light source unit 15 is provided at the front right side position of the lower cabinet 3A of the liquid crystal projection television 1A. The light source unit 20 provided in the lower cabinet 3A main body, A lamp house accommodating portion 21 that is positioned and fixed to the lamp, a lamp house 22 having a high-intensity discharge lamp, a protective cover 39 having a handling means, and a large number of through holes that also serve as a passage for sound and air. And a first grill 18a having

  As shown in FIG. 4, the light source accommodation unit 20 includes a light source accommodation frame 25 provided on a frame body 24 arranged on the front surface of the lower cabinet 3 </ b> A, and a lamp house accommodation unit 21. It is formed by disposing the frame body 24 on the front surface thereof.

  As shown in FIG. 4, the light source housing frame 25 is formed in a substantially rectangular window shape, and the engaging projections 26 a to 26 d that serve as reinforcements at the four corners and also serve as the guide for the lamp house 22. The structure is provided.

  As shown in FIG. 5, the lamp house accommodating portion 21 is formed of a substantially square heat insulating material, has a bowl shape, and has a diamond-shaped optical path window portion 26 on the left side surface with respect to the mounting direction. The other three side surfaces are provided with a large number of through holes 27 of a predetermined size, and the end portion of the opening portion 28 is provided with a screw hole portion 29 for locking the lamp house 22.

  As shown in FIG. 4, the light source housing part 20 having such a structure first houses the lamp house housing part 21 at the light source housing position of the lower cabinet 3 </ b> A main body, It is fixed by screwing on the back. And it completes by covering the frame 24 from the top.

  Next, the lamp house 22 will be described. As shown in FIG. 5, the lamp house 22 is formed in a quadrangular shape that is substantially the same as the shape of the lamp house housing portion 21, and is formed by connecting the left side surface and the front side in the housing direction at right angles. Lamp support portion 31 of a heat insulating member that supports 30; a handle portion 32 integrally formed of the same heat insulating member on the front surface side of the lamp support portion 31; and a right side surface formed of a metallic material and accommodated. , The back surface, the plane, and the bottom surface are perpendicular to each other, and the lamp cover portion 34 is formed in a net shape including a large number of through holes 33.

  The lamp support portion 31 is provided with a circular window portion 35 that is engaged and supported so that the front glass surface of the lamp 31 faces the outside.

The handle portion 32 is located on the front side of the lamp house 22 and includes a screw portion 37 having fixing screws 36 on both sides, a lamp handle on the lower side, and a handle (handle) 38 attached to the upper portion. It has become. The screw 36 inserted into the screw portion 37 is a hex screw that is removed by a hex wrench so that it cannot be easily taken, but it is needless to say that the screw 36 is not limited to this.

  The handle 38 is an upper part of the position where the handling of the lamp 30 is described, and has a structure formed in a substantially semicircular blind hole shape from the upper side and the lower side at a position slightly to the right of the center position. In the handle 38 having such a structure, the thumb is inserted from above with one of the right hand or the left hand, the index finger is inserted from below, and the back part of the other finger is placed near the position where the handling of the lamp 30 is described. It has a structure that allows handling such as insertion and removal. That is, a structure having a handle 38 with a thumb and an index finger and a structure that is difficult to handle with other fingers and the like, and a stable holding state when the lamp 30 is held, and a structure that makes the handling of the lamp 30 cautious. It has become.

  As shown in FIG. 5, the protective cover 39 is formed in a substantially square shape, a rod-shaped knob 40 sandwiching grooves on both sides in the lateral direction, and a method of replacing the lamp 30 at the lower position of the knob 40. It is comprised from the handling part 41 which is a handling means, and engages after accommodating the lamp house 22 in the lamp house accommodating part 21. FIG. By intentionally providing the protective cover 39 in this way, attention can be drawn to the fact that the lamp 30 is hot when the lamp 30 is replaced, so that the lamp 30 can be replaced with care, and the replacement work can be performed even by an amateur. In the handling part 41, consideration is given so that an accurate replacement work can be performed.

  As shown in FIG. 3, the light source unit 15 having such a structure has a lamp house accommodating unit 21 installed in the light source accommodating unit 20 of the main body of the liquid crystal projection television 1A, and the lamp house 22 is inserted from the front side and engaged. . At this time, although not shown, a connector for supplying power to the lamp 30 provided on the back surface of the lamp house 22 is connected to the main body. And the lens surface which the lamp | ramp 30 irradiates will be in the state which faced through the window part 26 for optical paths (refer FIG. 5). Then, the protective cover 39 is attached so as to cover the lamp house 22, and the second grille 18b, which is a decorative plate, is assembled and completed. In this way, the lamp house 22 provided with the back-illuminating lamp is made into a cartridge form, and a structure that can be easily removed and replaced even by an amateur from the front side of the liquid crystal rear projection television 1A is realized.

It is a front view of the liquid crystal rear projection television which is a rear projection type video device concerning the present invention. It is a side view of the liquid crystal rear projection television according to the same embodiment. It is a disassembled perspective view of the light source part of the liquid-crystal rear projection television based on the Example. It is the perspective view which expanded and showed the light source part of the liquid crystal rear projection television based on the Example. It is the perspective view which decomposed | disassembled and showed the light source part. It is a side view of the liquid crystal rear projection television which is a rear projection apparatus in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Liquid crystal rear projection television 2, 2A Upper cabinet 3, 3A Lower cabinet 4, 4A Screen 5, 5A Mirror 6 Projection lens 7 Optical unit 8 Lamphouse 10 Frame part 11 Top wall 12 Side wall 13 Back wall 14 Bottom wall 15 Light source section 16 Speaker 17 Air intake port 18a First grill 18b Second grill 19 Operation panel section 20 Light source housing section 21 Lamp housing section 22 Lamp house 24 Frame body 25 Light source housing frame 26 Optical path window section 27 Through hole 28 Opening Section 29 Screw hole section 30 Lamp 31 Lamp support section 32 Handle section 33 Through hole 34 Lamp cover section 35 Window section 36 Fixing screw 37 Screw section 38 Handle 39 Protective cover 40 Knob 41 Handling section

Claims (3)

A rear projection type video apparatus having a lamp house with a light source that projects light from the back of the screen,
The upper part formed into a box shape in which the inside is hollow as a whole by the front part, top wall part, both side wall parts, back wall part, and bottom wall part forming a rectangular frame shape and the periphery is sealed except for the front part. Cabinet,
A lower cabinet disposed under the upper cabinet;
A screen that is provided on the front surface of the upper cabinet and forms the screen;
A mirror provided in the upper cabinet;
A lamp house accommodating portion that is provided on the front surface of the lower cabinet and accommodates the lamp house from the front direction of the lower cabinet;
With
The lamp house has at least one surface formed of a heat insulating member, and has a handle formed integrally with the heat insulating member on the one surface, and the lamp house accommodating portion from the front surface direction of the apparatus main body by the handle. A rear projection type video apparatus, wherein the rear projection type video apparatus is detachably attached to the camera.   2. The rear projection type image device according to claim 1, wherein the lamp house is provided with a glass plate in front of the light source.   2. The rear projection type image device according to claim 1, wherein the lamp house is provided with a lamp cover having a plurality of through holes.

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