JP2001209118A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a mechanism is complicated in the case of installing a position adjusting mechanism of good operability, and also, the cost, the weight and the capacity are increased. SOLUTION: A lens whose position should be adjusted is formed of plastic material, and a part of the adjusting mechanism is molded integrally with the lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art FIG. According to the present invention, a light beam from a light source 21 such as a lamp is
2a, 22b and focusing lens 23, etc.
After dispersion, superposition and positioning, the liquid crystal panel 25
The present invention relates to a projection-type display device that enlarges and projects onto a screen via a projection lens 26 after image information is included in the display device.
More specifically, the present invention relates to an adjusting mechanism for making the projection light flux and the image information position coincide with each other in the optical system of such a projection type display device. Downstream, color separation and color composition are often adopted).

[0002]

2. Description of the Related Art As a mechanism for matching the position of a projected light beam with the position of image information in an optical system of a projection display device, for example, there is a mechanism as shown in FIG. The lens 31 is fixed to the lens holder 32 by a lens mounting bracket 33, and the tip of an x-direction position adjustment screw 34 and a y-direction position adjustment screw 35 screwed into a tap portion of an adjustment screw stay 36. By pushing the lens holder 32 in, the positioning of the lens 31 in the x and y directions is adjusted.

[0003]

In the position adjusting mechanism of the above-mentioned conventional mechanism, it is necessary to fix the adjusting screw with an adhesive or the like after completion of the positioning adjustment in order to prevent the adjusting screw from being loosened.
Screw 34 or 3 adjusted first in x direction or y direction
5 is screwed in, the lens holder 32 and the screw 34 or 35 are engaged with each other, and the screw 35 or 3 to be adjusted next
4 does not follow the lens holder 32 smoothly. As the position adjustment work progresses, as shown in FIG. 4, the axes of the adjustment screws 41a and 41b and the axes of the lenses 42a and 42b are shifted, so that the independence in one-dimensional direction is lost and the adjustment work is easy. No longer. Lens 31 and lens holder 32
Must be assembled in advance as a preparatory work. There is a problem that a tool such as a screwdriver is required for the adjustment work.

Therefore, an object of the present invention is to provide a mechanism for solving the above-mentioned problems.

[0005]

According to the present invention, in order to solve the above-mentioned problems, the lens body is made of a plastic such as a thermoplastic resin, and a positioning rack and an adjusting slide slide are formed on optically ineffective portions. Part and a handle for adjustment work were provided, and were integrally molded.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram of a focusing lens used in an optical system of a projection display apparatus according to an embodiment of the present invention. This lens is provided with an edge which is an optically ineffective portion around the lens portion 11, where an x-direction positioning rack 14, a y-direction positioning rack 15, and an x-direction sliding portion 1 are provided.
2. The y-direction sliding portion 13 and the adjustment work handle 16 are integrally formed. The x-direction positioning rack 14 has a mountain-shaped rack shape as shown in the cross section BB in the figure, and the x-direction positioning protrusion 1 formed on the case side.
By engaging with 41, the positioning in the x direction is performed. Here, since the x-direction positioning rack 14 has grooves formed in parallel with the y-direction, it can slide in the y-direction even after the x-direction positioning. Also, the y-direction positioning rack 1
5 has a saw-tooth-shaped rack shape as shown in the AA section in the figure, and performs positioning in the y direction by engaging with a y-direction positioning claw 151 provided on the case side. In addition, z is used for fixing the position of the lens in the z direction.
Direction holding leaf spring 18 and y for positioning in the y direction.
It is composed of a direction return leaf spring 17.

Next, a method of an actual positioning adjustment work will be described. The focusing lens is inserted into a predetermined position of the projected projection display device, and first, x
In this case, hold the handle 16 for adjusting the lens and tilt it slightly in the direction C so that the y-direction positioning rack 15 does not engage with the y-direction positioning claw 151 on the case side. To The insertion depth of the lens is determined by the x-direction positioning rack 14 and the x-position on the case side.
The x-direction slide portion 12 is pressed against the case as a position just before the direction-positioning protrusion 141 is engaged with the case,
By sliding, the position in the x direction is adjusted, and after the position is determined, it is slightly inserted in the direction D in the figure, and the x direction positioning rack 14 is engaged with the x direction positioning projection 141 on the case side to position in the x direction. I do. Subsequently, the lens is adjusted in the y direction. The lens is returned to the direction E in the figure, the rack 15 for y direction positioning and the claw 151 for y direction positioning are engaged, and the handle 16 for adjustment work is held in the direction D in the figure. To adjust the position in the y direction.
Here, since the y-direction positioning rack 15 and the y-direction positioning claw 151 have a ratchet structure, if the lens goes too far in the direction D in the drawing, the lens is tilted in the direction C in the drawing to engage the ratchet. After being released, it is returned to the F direction in the figure by the force of the y-direction return leaf spring 17, and the y-direction adjustment is performed again.

[0008]

As described above, according to the present invention,
Plastic is used as the material of the lens that needs position adjustment, and a positioning rack, an adjustment slide sliding part, and an adjustment work handle are provided on the optically ineffective part of the lens to form an integral part. Thus, there is an effect that an adjustment work with good workability can be provided without requiring a tool. Further, since the adjusting mechanism is simplified, there is an effect that the adjusting mechanism can be provided relatively inexpensively.

[Brief description of the drawings]

FIG. 1 is a view showing a plastic lens integrally molded with a position adjusting mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a projection display apparatus optical system configuration according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of a position adjustment mechanism according to the related art.

FIG. 4 is a diagram illustrating an example of a problem of a position adjusting mechanism according to the related art.

[Explanation of symbols]

11 ... Lens part, 12 ... X direction sliding sliding part, 13 ...
sliding part in y direction, 14... positioning rack in x direction,
141 ... x-direction positioning projection (case side), 15 ... y
Direction positioning rack, 151: y-direction positioning claws (case side), 16: adjusting handle, 17: y-direction return leaf spring, 18: z-direction pressing leaf spring, 19: case, 21: light source, 22a ... First lens array, 22b ...
Second lens array, 23 focusing lens, 24
... condenser lens, 25 ... liquid crystal panel, 26 ... projection lens, 31 ... lens, 32 ... lens holder, 33 ... lens mounting bracket, 34 ... x-direction position adjustment screw, 35 ...
Screw for position adjustment in y direction, 36 ... Stay for adjustment screw, 37
... y-direction return leaf spring, 38 ... x-direction return leaf spring, 39 ...
Case, 41a: axis of x-direction adjustment screw, 41b: axis of y-direction adjustment screw, 42a: axis of x direction of lens, 42b: axis of y direction of lens.

Claims (1)

[Claims] 1. A light source, a dispersing and superimposing means for making a light flux distribution on a light source aperture surface emitted from the light source more uniform on a projection surface, and a projection light source size position and image on an image information surface. Means for adjusting the information size position, and a projection display device having means for enlarging and projecting the modulated light containing image information on the screen, as an adjustment means for matching the projection light source size position and the image information size position, An optical component such as a lens used as a means for superimposing the distributed light source light beam, and a positioning rack, an adjusting slide sliding portion, and an adjusting work handle are integrally formed of a thermoplastic resin or the like. A projection type display device characterized by the above-mentioned.