JP3402103B2 - Projection display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention decomposes a white light flux from a light source into three color light fluxes of red, green and blue, and makes each of these color light fluxes correspond to image information through a light valve composed of a liquid crystal panel. The present invention relates to a projection display device that modulates and re-synthesizes modulated light fluxes of respective colors, and enlarges and projects the light flux on a screen through a projection lens.

[0002]

2. Description of the Related Art In recent years, projection type display devices have been strongly required to have high definition and high brightness in order to enlarge and project image signals of a personal computer, video, etc. on a screen. Hereinafter, a conventional projection display device will be described. A conventional projection display device is shown in FIG. FIG. 5 is a plan view showing a schematic configuration of a conventional projection type display device. The optical unit 102 attached to the lower case 101 is the projection lens unit 10.
3 and an optical lens unit 104 that decomposes and combines white light to form image information. The lamp house 1 is connected to the optical lens unit 104 via a connecting member 105.
06 is attached. Inside the lamp house 106, there is a lamp box 107 that can be removed in the direction of arrow G.
And a metal halide lamp (hereinafter referred to as a white light source) as a white light source integrated with the reflector inside the lamp box 107.
A lamp is simply referred to as a lamp) 108 is positioned and fixed to the lamp mounting bracket 109, and the lamp mounting bracket 109 is further fixed to the lamp box 107.

Since the lamp 108 is constructed as described above, the lamp 108 is connected to the optical unit 102 by the connecting member 105,
It was mounted via the lamp house 106, the lamp box 107, and the lamp mounting bracket 109.

[0004]

However, in the above-mentioned conventional structure, it is difficult to improve the mounting accuracy because there are many parts interposed between the lamp and the optical unit, and the utilization efficiency of the light from the lamp is reduced, and in practice There was a problem that the amount of light projected on the screen was insufficient. Further, in order to improve the mounting accuracy of the lamp to the optical unit, it is necessary to improve the accuracy of each component, which causes a problem of cost increase.

The present invention solves the above-mentioned problems of the prior art by providing a structure capable of accurately positioning with respect to the optical unit of the lamp, improving the utilization efficiency of the luminous flux emitted from the lamp, and increasing the brightness. It is an object of the present invention to provide a projection type display device that can be used.

[0006]

In order to achieve this object, a projection type display device of the present invention has a structure in which a positioning member mounted on an optical unit positions a lamp mounting bracket on which a lamp is mounted. ing. With this configuration, the lamp can be accurately positioned with respect to the optical unit, and the utilization efficiency of the light flux emitted from the lamp is improved, so that high brightness can be achieved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is mounted on an exterior member and optically processes white light of a lamp as a light source to form an optical image corresponding to image information, An optical unit for enlarging and projecting on a screen, a box-shaped lamp house attached to the exterior member, having an opening in one direction perpendicular to the optical axis, and the lamp house attached to a predetermined position of the optical unit. A positioning member having a plurality of positioning pins erected in the opening direction of the lamp, a lamp mounting bracket having a plurality of holes in which the lamp is mounted at a predetermined position and fitted into the positioning pins of the positioning member, and the lamp mounting member. It is equipped with a metal fitting in a loosely fitted state, and is equipped with a spring member that biases the lamp mounting metal fitting in one direction. And a lamp box capable of positioning the lamp with respect to the optical unit by positioning the lamp mounting bracket on the optical unit by the positioning member when fitted to the lamp house. A projection type display device characterized in that it is attached to the optical unit, by a positioning member having a plurality of positioning pins,
The lamp housing is built in the lamp box, the lamp is mounted at a predetermined position, and the lamp mounting bracket having a plurality of holes that fit into the positioning pins can be directly positioned with respect to the optical unit. In addition, the lamp can be accurately positioned with respect to the optical unit regardless of the accuracy of the lamp box and the mounting accuracy thereof.

According to a third aspect of the present invention, an optical device mounted on an exterior member, optically processes white light of a lamp as a light source to form an optical image corresponding to image information, and projects the optical image on a screen in an enlarged manner. A unit, a lamp house attached to the exterior member, having a box shape, and having an opening in one direction perpendicular to the optical axis; and a lamp house attached at a predetermined position of the optical unit and provided in the opening direction of the lamp house. A positioning member having a plurality of holes, a lamp mounting bracket having a plurality of positioning pins to which the lamp is mounted at a predetermined position and fitted in the holes of the positioning member, and the lamp mounting bracket are installed in a loosely fitted state. A lamp member for urging the lamp mounting member in one direction, and is configured to be fitted to the lamp house so as to be detachable from the outside of the device; In a state in which the lamp mounting bracket is fitted to the optical unit, the lamp mounting bracket is positioned on the optical unit by the positioning member, so that a lamp box for positioning the lamp with respect to the optical unit is provided. A display device, which is mounted in the optical unit and has a positioning member having a plurality of holes, which is incorporated in the lamp box so that the lamp is mounted at a predetermined position and a plurality of positioning members which fit into the holes of the positioning member. Since the lamp mounting bracket with pins can be directly positioned with respect to the optical unit, the lamp can be accurately positioned with respect to the optical unit regardless of the accuracy of the lamp house, the accuracy of the lamp box, and their mounting accuracy. It has the effect of being able to.

FIG. 1 shows an embodiment of the present invention.
4 to FIG. (Embodiment 1) FIG. 2 is a plan view showing a schematic configuration of a projection type display device of the present invention. In FIG. 2, an optical unit 2 attached to a lower case 1 as an exterior member is a projection lens unit 3 and White light from the light source is decomposed and synthesized,
It is composed of an optical lens unit 4 that forms image information and is integrally configured. A lamp positioning fitting 5 is attached to the optical lens unit 4 as a positioning member.

Further, a lamp house 6 is attached to the lower case 1, and a metal halide lamp (hereinafter simply referred to as a lamp) 7 as a light source and a lamp mounting metal fitting 8 to which the lamp 7 is attached are built in. The box 9 is fitted, and the lamp 7 is detachable in the direction of arrow B so that the lamp 7 can be replaced from outside the device. FIG. 1 is a cross-sectional view showing a cross section taken along the line AA of FIG. 2, and three positioning lamps having a tapered shape near the tip are provided on the lamp positioning member 5 in the opening direction of the lamp house 6 and in the direction perpendicular to the optical axis. The pins 10, 11 and 12 are crimped.

The lamp mounting bracket 8 has a round hole 13 for fitting these pins, an elongated hole 14 for fixing the position only in the Y direction,
15 is provided, and is attached to the lamp box 9 in a state of having a predetermined “play” with respect to the lamp box 9, and is biased in the direction of arrow C by a leaf spring 16 as a spring member. The operation of the projection type display device configured as described above will be described.

When the lamp box 8 is mounted on the lamp house 6 from the outside of the apparatus, the lamp mounting bracket 8 on which the lamp 7 is mounted is urged by the leaf spring 16 in the direction of arrow C in the lamp box 9, and the lamp positioning bracket 5 is attached. To the positioning pins 10, 11 and 12 of the
And the long holes 14 and 15 are fitted and attached. At this time, the X direction and the θ direction of the lamp mounting bracket 8 are
The mounting surface of the positioning pins 10 and 11 of the lamp positioning bracket 5 and the surface of the lamp mounting bracket 8 on which the round hole 13 and the elongated hole 14 are provided are fixed to each other and fixed in the Y direction.
It is fixed by the long hole 14 and the positioning pin 12 fitted to it, and the long hole 15 fitted to it, and is fixed by the positioning pin 10 and the round hole 13 fitted to it in the Z direction. As a result, the lamp 7 can be accurately positioned with respect to the optical unit 2 regardless of the accuracy of parts of the lamp house 6 and the lamp box 9 and their mounting accuracy.

(Embodiment 2) FIG. 4 is a plan view showing a schematic structure of a projection type display device of the present invention. In FIG.
The optical unit 22 attached to the lower case 21 as an exterior member includes a projection lens unit 23 and an optical lens unit 24 that decomposes and combines white light from a light source to form image information, and is integrally configured.

A lamp positioning fitting 25 is attached to the optical lens unit 24 as a positioning member.
Further, a lamp house 26 is attached to the lower case 21, and a metal halide lamp (hereinafter, referred to as a light source) as a light source is internally provided.
A lamp box 2 having a built-in lamp mounting bracket 28 to which the lamp 27 is attached
9 is fitted and detachable in the direction of arrow E so that the lamp 27 can be replaced from outside the device.

FIG. 3 is a cross-sectional view showing the DD cross section of FIG. 4, and the lamp positioning member 25 has a round hole 3 formed in the opening direction of the lamp house 26 and at a right angle to the optical axis.
0 and elongated holes 31 and 32 are provided. Positioning pins 33, 34, and 35 having a tapered shape are fitted to the lamp mounting bracket 28 in the vicinity of the tip end thereof in a direction perpendicular to the optical axis, and the lamp box 29 has a predetermined "play". Is attached to the lamp box 29 and is biased in the direction of arrow F by a leaf spring 36 as a spring member.

The operation of the projection type display device constructed as above will be described. When the lamp box 28 is attached to the lamp house 26 from the outside of the apparatus, the lamp mounting bracket 28 to which the lamp 27 is mounted is urged by the leaf spring 36 in the arrow F direction inside the lamp box 29, and the lamp positioning bracket 25 has a round hole. 30 and long hole 31,
32, positioning pins 33, 3 of the lamp mounting bracket 28,
4, 35 are fitted and attached.

At this time, the X direction of the lamp fitting 28 and θ
Direction is round hole 30, long hole 31 of lamp positioning bracket 25
Surface and the positioning pins 33, 34 of the lamp mounting bracket 28.
Is fixed by hitting the mounting surface of the positioning pin 3 in the Y direction.
4, elongated holes 31 and positioning pins 35 fitted therein,
It is fixed by a long hole 32 fitted therein, and fixed in the Z direction by a positioning pin 33 and a round hole 30 fitted therein. As a result, the lamp 27 can be accurately positioned with respect to the optical unit 22 regardless of the accuracy of the parts of the lamp house 26 and the lamp box 29 and their mounting accuracy.

[0018]

As described above, according to the present invention, since the accuracy of mounting the lamp on the optical unit is improved, the utilization efficiency of the light emitted from the lamp as the light source is improved, so that a high-luminance projection display device can be realized. That is an excellent effect.

[Brief description of drawings]

1 is a sectional view showing an AA section of FIG. 2 in Embodiment 1 of the present invention.

FIG. 2 is a plan view showing a schematic configuration according to the first embodiment.

FIG. 3 is a sectional view showing a DD section of FIG. 4 in Embodiment 2 of the present invention.

FIG. 4 is a plan view showing a schematic configuration according to the second embodiment.

FIG. 5 is a plan view showing the configuration of a conventional projection display device.

[Explanation of symbols]

1 lower case 2 Optical unit 5 Lamp positioning bracket 6 lamp house 7 Metal halide lamp (lamp) 8 Lamp mounting bracket 9 lamp box 10, 11, 12 Positioning pin 13 round holes 14, 15 oblong holes 16 leaf spring 21 Lower case 22 Optical unit 25 Lamp positioning bracket 26 Lamp House 27 Metal halide lamp (lamp) 28 Lamp mounting bracket 29 lamp box 30 round holes 31, 32 long holes 33, 34, 35 Positioning pin 36 leaf spring

Front Page Continuation (72) Inventor Takehiro Okada 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Makoto Hoshino 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. ) References JP-A-7-204043 (JP, A) JP-A-7-306412 (JP, A) Actually open 60-26043 (JP, U) Actually open 52-145833 (JP, U) Actual public 49-7576 (JP, Y1) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 21/20 G03B 21/14

Claims (4)

(57) [Claims] 1. An optical unit which is attached to an exterior member, optically processes white light of a lamp as a light source to form an optical image corresponding to image information, and enlarges and projects the image on a screen. A lamp house that is attached, has a box shape, and has an opening in one direction perpendicular to the optical axis, and is installed in a predetermined position of the optical unit, stands upright in the opening direction of the lamp house, and has a taper shape near the tip. A positioning member provided with a plurality of positioning pins having a lamp, a lamp mounting member having the lamp mounted at a predetermined position and having a plurality of holes fitted into the positioning pin of the positioning member, and the lamp mounting member being loosely fitted. A built-in state, and a spring member for urging the lamp mounting bracket in one direction,
With a shape that fits into the lamp house, is configured to be detachable from the outside of the device, and in a state where it is fitted into the lamp house, the lamp mounting bracket is positioned in the optical unit by the positioning member, A projection display device comprising a lamp box capable of positioning the lamp with respect to the optical unit. 2. At least one of the holes provided in the lamp mounting bracket has a round hole shape that fits into the positioning pin, and the other holes are oblong holes that regulate the position in only one direction. The projection display device according to claim 1, which has a shape. 3. An optical unit which is attached to an exterior member, optically processes white light of a lamp as a light source to form an optical image corresponding to image information, and enlarges and projects the image on a screen. A lamp house that is attached and has a box shape and has an opening in one direction perpendicular to the optical axis, and a positioning member that is attached to a predetermined position of the optical unit and has a plurality of holes provided in the opening direction of the lamp house. With the lamp mounted at a predetermined position, fitted in the hole of the positioning member, and provided with a plurality of positioning pins having a tapered shape in the vicinity of the tip, and the lamp mounting bracket being loosely fitted. A built-in spring member for urging the lamp mounting bracket in one direction,
With a shape that fits into the lamp house, is configured to be detachable from the outside of the device, and in a state where it is fitted into the lamp house, the lamp mounting bracket is positioned in the optical unit by the positioning member, A projection display device comprising a lamp box capable of positioning the lamp with respect to the optical unit. 4. At least one of the holes provided in the positioning member has a round hole shape that fits into a positioning pin provided in the lamp mounting bracket, and the other holes have only one direction. The projection display device according to claim 3, wherein the projection display device has a long hole shape that regulates a position.