JP2005283708A - Lamp light source for image projecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accurate adjusting means for adjusting the mutual relational positions of the lamp and the lamp reflection mirror of a light source lamp for an image projecting device, and a means for sticking the lamp and the reflection mirror and capable of correcting positional adjustment. <P>SOLUTION: A lamp holding adjusting device making the lamp freely move in all the directions without depending on heating and calcining a high heat resistant inorganic adhesive widely applied from before at high temperature is used as the means for sticking the light source lamp and the reflection mirror of the image projecting device. The means for adjusting the mutual relational positions of the lamp and the lamp reflection mirror can adjust movement in all the directions including an X-axis, a Y-axis and a Z-axis. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a position adjustment device, a fixing device, and an assembly production method for a lamp light source for an image projection apparatus.

Regarding a lamp light source for an image projection apparatus, there is Japanese Patent Publication No. 2000-76988 “Light source for a projection apparatus”. In order to align the lamp and the lamp reflector of the lamp light source for the image projection apparatus with the magnifying projection optical system, it is necessary to precisely adjust the relative position between the lamp and the lamp reflector (hereinafter referred to as a reflector). When the positional adjustment of the relationship between the lamp and the lamp reflecting mirror is completed, it is necessary to fix the lamp and the reflecting mirror. The position adjustment requires an accuracy of 0.1 mm, and the deviation from the optimum position causes a decrease in luminance of the projected image and uneven surface luminance.

As a method of adjusting the position of the lamp and the reflecting mirror, as shown in FIG. 6, the reflecting mirror 11 and the lamp 10 are arranged in the magnifying projection optical system 51, and the lamp held by some means is set to the X axis, Y axis, And a holding and adjusting device 52 that is movable in each direction of the Z axis. The relative position of the lamp 10 and the reflecting mirror 11 is adjusted so that the brightness of the projected image on the image projection screen 53 and the surface brightness uniformity are optimal, and heat resistance is required for fixing after adjustment. Therefore, a high heat-resistant inorganic adhesive (for example, “Sumiceram” under the trade name, hereinafter referred to as an adhesive) was used, and high-temperature heating and firing were required for solidifying the adhesive.
JP 2000-76988 "Light source for projection apparatus"

In order to fully demonstrate the ability of the magnification projection optical system of the image projection apparatus, the lamp light emitting unit is
It is required to be close to a point light source. Also, the relative position between the lamp and the lamp reflector reduces the original performance of the optical system due to a decrease in position accuracy, resulting in a decrease in brightness of the projected image and uneven surface brightness. In the adjustment, it was necessary to maintain a high accuracy of 0.1 mm.

Since the operating temperature of the lamp and its surroundings reaches several hundred degrees for fixing the lamp and the reflector, it is necessary to use an adhesive with high heat resistance. Due to the mechanical impact in the filling process and the expansion and contraction of the adhesive in the heating and baking process of the adhesive, the adjustment position may be displaced, which causes a defect.

Mutual relationship between the lamp and the mirror When the position adjustment failure occurs after adjusting the position, the adhesive used for fixing the lamp and the mirror is removed and the high-temperature heat-fired adhesive is removed. It is necessary to separate the lamp, but the glass lamp is broken during the separation work, and the film formation surface of the reflector is damaged. This was a factor in reducing the adjustment yield.

As a means to fix the lamp and the reflecting mirror constituting the lamp light source of the image projection device, a lamp holding and adjusting device that can move the lamp in all directions is used, regardless of the high-temperature heating and baking of adhesive that has been widely used in the past. To do.

The following effects are brought about by the present invention. Since no adhesive is used as a means for fixing the lamp constituting the lamp light source of the image projection apparatus and the reflecting mirror, mechanical impact in the process of filling the gap between the lamp and the reflecting mirror with the adhesive, In addition, it is possible to prevent misalignment due to thermal expansion and contraction of the material in the heating and baking process for solidifying the adhesive.

Conventionally, since the lamp and the reflecting mirror are fixed by an adhesive, it is possible to adjust the relative position between the lamp and the reflecting mirror, which is impossible when mounted on the image projection apparatus. Further, after the position adjustment, an adhesive heating and baking step is not necessary, and after the position adjustment is completed, immediate shipment is possible, and the production process can be simplified.

As a means for fixing the lamp constituting the lamp light source of the image projection apparatus and the reflecting mirror, an adhesive is not used. Therefore, in the unlikely event that a deviation occurs after position adjustment, and a malfunction of a component has been discovered. Even in this case, it is possible to readjust and correct the lamp fixing screw. In addition, the lamp and the reflecting mirror can be separated, and the production efficiency of the lamp light source can be improved.

FIG. 1 is a first embodiment of the present invention, and FIG. 1 (a) is a longitudinal sectional view of a lamp light source. 1B is a cross-sectional view taken along the cutting line C1-C′1 in FIG. 1A, and FIG. 1C is a perspective view of the lamp holding spring 13. FIG. As shown in FIG. 1C, the lamp holding spring 13 has a U-shaped leaf spring, the open leg portion of the lamp holding spring 13 is fixed to the inner peripheral surface of the reflector base 12, and the top is the lamp base. While pressing 17, the lamp 10 formed integrally with the lamp cap 17 is held.

The lamp base 17 fixed to one end of the lamp 10 is temporarily held by four lamp holding springs 13 disposed on the inner periphery of the reflecting mirror base 12 fixed to the reflecting mirror 11 of FIG. The lamp 10 uses a holding adjustment device that moves only in the Z-axis direction in the holding adjustment device 52 shown in FIG. 6, and is held so as to move only in the Z-axis direction. In the X-axis and Y-axis directions, The lamp fixing screw 14 is used as a lamp position adjusting means. For example, in FIG. 1B, when the lamp shaft is moved to the left, the right lamp fixing screw 14 is screwed and the left lamp fixing screw 14 is loosened. After the adjustment to the optimum position, the opposing lamp fixing screw 14 is tightened to fix the lamp 10.

FIG. 2 is a second embodiment of the present invention, FIG. 2 (a) is a longitudinal sectional view of a lamp light source, and FIG. 2 (b) is a section line C2-C ′ of FIG. 2 (a). 2 is a cross-sectional view taken along line 2. FIG. In FIG. 1 showing the first embodiment, the lamp holding springs 13 and the lamp fixing screws 14 arranged alternately on the inner peripheral surface of the reflector base 12 are shown in FIG. 2B in the second embodiment. As described above, each of the holding spring 13 and the lamp fixing screw 14 is arranged on the same axis.

FIG. 3 shows a third embodiment of the lamp for an image projection apparatus according to the present invention, FIG. 3 (a) is a longitudinal sectional view of the lamp light source, and FIG. 3 (b) is a sectional view of FIG. 3 (a). It is sectional drawing cut | disconnected along line C3-C'3. Each of the two lamp holding springs 13 and the lamp fixing screw 14 are configured to face each other in the X-axis and Y-axis directions. In FIG. 3B, before the position adjustment, the lamp 10 is pressed obliquely in the upper right direction via the lamp cap 17 by the two lamp holding springs 13 arranged at right angles. By screwing the lamp fixing screw 14 facing the lamp holding spring 13, the position of the axis of the lamp 10 can be adjusted along the X axis and the Y axis. The movement in the Z-axis direction uses a holding adjustment device that is movable only in the Z-axis direction in the holding adjustment device 52.

FIG. 4 shows a fourth embodiment of a lamp for an image projection apparatus according to the present invention. 4A is a longitudinal sectional view of the lamp light source, and FIG. 4B is a sectional view taken along a cutting line C4-C′4 of FIG. 4A. FIG. 4C is a detailed view of the rear end of the lamp base 17, and FIG. 4D is a detailed view of the lamp holding spring plate 15. FIG. 4E is a cross-sectional view taken along the cutting line C5-C′5 in FIG.

As shown in FIG. 4A, the fourth embodiment of the present invention shown in FIG. 4 includes a Z-axis adjusting lamp holding spring plate 15 and a Z-axis adjusting screw 16, and FIG. A key projection 18 having a rectangular cross section formed at the rear end portion of the lamp base 17 shown in FIG. 4 is inserted into a keyhole 19 having a rectangular opening formed in the Z-axis adjusting lamp holding spring plate 15 shown in FIG. Further, as shown in FIG. 4E, the key protrusion 18 is rotated 90 degrees in the axial rotation direction together with the lamp base 17 so that the lamp base 17 is tightly coupled to the Z-axis adjusting lamp holding spring plate 15. .

In FIG. 4A, the Z axis before the position adjustment held by the Z axis adjustment lamp holding spring plate 15 and the Z axis of the base 17 are shifted closer to the reflecting mirror 11 than the optimum position to adjust the Z axis. The Z-axis is adjusted to the optimum position by screwing the screw 16. With the above configuration, even if a deviation occurs in the Z-axis direction in addition to the X-axis and the Y-axis, fine adjustment is possible in all directions, and the yield of lamp position adjustment is improved.

As means for fixing the lamp 10 and the reflecting mirror 11 constituting the lamp light source of the image projection apparatus, the lamp 10 is movable in all directions regardless of the high-temperature heating and baking of the adhesive, as shown in FIG. A manipulator 22 that adjusts the relative position of the lamp and the reflector along all directions of the X axis, the Y axis, and the Z axis with the brightness sensor 20 that measures the brightness on the image projection screen 53 and the personal computer 21 or the like. By controlling the above, position adjustment can be automated.

In addition, although the top part of the lamp holding spring 13 was pressed against the lamp base 17 as an embodiment of the invention described above, it can also be pressed against the inner peripheral surface of the reflector base 12, and further, the lamp holding spring. 13 is a biasing means in the direction of the lamp fixing screw 14 and is not limited to a U-shaped leaf spring. Further, the positional relationship between the lamp 11 and the lamp reflecting plate 11 can be adjusted by using only three or four lamp fixing screws 14 without using the lamp holding spring 13. Furthermore, it is possible to prevent loosening with a screw lock agent after the lamp fixing screw 14 is adjusted.

INDUSTRIAL APPLICABILITY The present invention can be used for strict adjustment and fixing of the relative position between the lamp of the lamp light source for the image projection apparatus and the reflector.

1A is a longitudinal sectional view of the lamp light source according to the first embodiment, FIG. 1B is a sectional view taken along a cutting line C1-C′1 in FIG. 1A, and FIG. FIG. 3 is a perspective view of a lamp holding spring 13. 2A is a longitudinal sectional view according to the second embodiment of the lamp light source, and FIG. 2B is a sectional view taken along a cutting line C2-C′2 of FIG. 2A. FIG. 3A is a longitudinal sectional view according to the third embodiment of the lamp light source, and FIG. 3B is a sectional view taken along a cutting line C3-C′3 of FIG. 4A is a longitudinal sectional view according to the fourth embodiment of the lamp light source, FIG. 4B is a sectional view taken along a cutting line C4-C′4 in FIG. 4A, and FIG. FIG. 4D is a detailed view of the key protrusion 18 having a rectangular cross section applied to the rear end of the lamp base 17, and FIG. 4D is a detailed view of the rectangular key hole 19 applied to the Z-axis adjusting lamp holding spring plate 15. FIG. 4E is a cross-sectional view taken along the cutting line C5-C′5 in FIG. It is a functional block diagram which shows one Embodiment which concerns on Example 5 of the assembly production method of the lamp light source for image projection apparatuses by this invention. It is a figure which shows one Embodiment of the lamp adjustment method for the conventional image projector.

Explanation of symbols

10: Lamp 11: Reflector 12: Reflector base 13: Lamp holding spring 14: Lamp fixing screw 15: Z axis adjusting lamp holding spring plate 16: Z axis adjusting screw 17: Lamp base 18: Key protrusion 19: Key Hall 20: Luminance sensor 21: Personal computer 22: Manipulator 51: Magnification projection optical system 52: Holding adjustment device 53: Image projection screen

Claims (5)

A lamp light source for an image projection apparatus, comprising: a lamp position adjusting means for adjusting a relative position between the lamp and the lamp reflecting mirror. 2. The lamp light source for an image projection apparatus according to claim 1, wherein the fixing means for the lamp and the lamp reflecting mirror also serves as the lamp position adjusting means. 3. The lamp light source for an image projection apparatus according to claim 1, wherein the lamp holding means is two or more springs, and the lamp fixing means serving also as the lamp position adjusting means is a screw. Lamp light source for projection equipment. 4. The lamp light source for an image projection apparatus according to claim 1, wherein the relative position adjusting means for the lamp and the lamp reflector is in all directions including the X-axis, Y-axis, and Z-axis directions. A lamp light source for an image projection apparatus, characterized in that movement adjustment is possible. 5. A lamp light source manufacturing method for an image projection apparatus according to claim 4, wherein the relative position adjustment between the lamp and the lamp reflector is performed by an automatic operation method.

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