JP2001083602A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size over the entire part and electric power loss by constituting a portion of components constituting a casing for housing a light source of a circuit board to be packaged with electronic circuits, such as electric power supplying means, for supplying electric power to a light source. SOLUTION: At least a portion of the components constituting the casing for housing the light source is composed of the circuit board to be packaged with the electronic circuits, such as the electric power supplying means, for supplying the electric power to the light source. For example, with this projector device, a lamp unit 104 is connected by a connecting terminal 102 to a lamp house composed of a connecting substrate 103 for the lamp in partial constitution. Namely, a power source circuit for the lamp 101 partly or wholly constitutes the lamp house with the connecting substrate 103 for the lamp. The output of the lamp light source is directly connected to the lamp unit 104 by using such constitution and therefore there is no worry about the wiring by cables, etc., the electric power loss by connecting points and the current leak by deterioration with lapse of time and the safe use of the device is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device, and more particularly to an improvement for improving safety and miniaturizing each structure of a light source housing and an optical system housing of the projector device.

[0002]

2. Description of the Related Art Conventionally, a structure of a lamp house for accommodating a lamp provided in a projector device is disclosed in Japanese Utility Model Laid-Open No. 05-004148 (hereinafter referred to as a conventional example).
2. Description of the Related Art A projector device has been disclosed in which a lamp house is set in sliding contact with a lamp case so that the lamp house is set without rattling.

FIG. 3 is a sectional view showing the structure of a conventional projector device. Referring to FIG.
The white light output from the lamp 301 housed in the lamp is made uniform by the integrators 303 and 304, then reflected at right angles by the total reflection mirror 305 and transmitted by the dichroic mirror 306 for green separation. The red light and the blue light are reflected and separated. The separated green light is reflected at right angles by the total reflection mirror 310 and
At 13, the light is modulated according to the image signal and is incident on the dichroic prism 314. The red light and the blue light reflected by the green separation dichroic mirror 306 are transmitted through the red light and reflected by the red separation dichroic mirror 307 to be separated by the blue light. The separated blue light is modulated by the light modulation element 212 according to the image signal, and is incident on the dichroic prism 314. Further, the red light transmitted through the red separation dichroic mirror 307 is reflected at right angles by total reflection mirrors 308 and 309, modulated by the light modulation element 311 in accordance with an image signal, and incident on the dichroic prism 314. You. Therefore, each color light is synthesized as a color image by the dichroic prism 314 and is projected from the projection lens 315 to the screen. The power supply 316 is a power supply for lighting and a power supply for other components.
Reference numerals 7 and 318 are circuit portions for video processing. The optical system occupies a large part of the volume of the projector body.

In a conventional projector having such a structure, the lamp 301 is mounted on a case made of a heat-resistant material using the lamp 301 as a lamp unit in consideration of replacement by a user. This lamp unit is set in a lamp house 302 provided in the projector.

FIG. 4 is an external view of a conventional lamp unit, and FIG. 5 is a side view of the conventional lamp unit and a lamp house. Note that the directions of the external terminals are different in FIGS. 4 and 5, but this is for the sake of illustration, and the terminal mounting position is not limited to this. In FIG. 5, the lamp 501 main body is formed integrally with the reflector 502. The lamp 501 body is connected to the external terminal 503 by a cable, and the external terminal 503 is connected to the lamp house 5.
06 is connected to a lighting power source (not shown) via a connection portion 505 provided in the device. FIG. 6 shows a partial structure of a conventional projector device. In the figure, a housing 601 of an optical system (an optical system for forming an image, such as a lamp, a lens, a mirror, a prism, and a light modulation element), and an external signal input, processing, and image formation on the housing 601. To create control signals, data signals, etc.
Electronic circuits 602 and 603 to be controlled are provided. Furthermore,
FIG. 7 shows a cross section of the structure of the optical system housing. In the figure, optical components 701 and 702 are optical system housing 7.
03. Circuit boards 704 and 705 are mounted on the optical system housing 703. In addition,
The circuit boards 704 and 705 are connected by an inter-board connector.

[0006]

In the lamp replacement of the conventional lamp unit having such a structure, a double case is used in order to make the replacement operation simple, safe and to improve the reproducibility of the lamp position. Therefore, the number of electrical contacts is increasing. However, since a discharge lamp needs to apply a voltage of about 20 KV at the time of starting and uses a high-power lamp, power supply with a cable and an increase in the number of connection points increase the size of the entire device and cause power loss. Will be done.

SUMMARY OF THE INVENTION The present invention has been made in view of these problems, and has as its object to provide a projector device that can reduce the size of the entire device and reduce power loss.

[0008]

In order to solve the above problems, according to a projector device of the present invention, in which light from a light source is modulated by a light modulation element and projected and displayed by a projection lens, the light source is accommodated. It is characterized in that at least a part of the components constituting the housing to be formed is constituted by a circuit board on which an electronic circuit such as power supply means for supplying power to the light source is mounted. Further, at least a part of the components constituting the housing forming the optical path using the optical system component is constituted by a circuit board on which an electronic circuit for the optical system component is mounted. Therefore, the size of the entire apparatus can be reduced by using the power supply and the substrate of the electronic circuit as a part of the housing.

Further, since the connection terminals of the electrodes of the light source main body are directly connected to connection parts for supplying power to the light source on the light source circuit side, it is possible to avoid an electric leakage accident due to deterioration with time and to provide a large number of contacts. Power loss can be reduced.

Further, as a connecting member for connecting the circuit boards, a member which does not reflect light is used, or a coating which does not reflect light is applied so as not to affect the optical path.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a projector apparatus according to the present invention, in which light from a light source is modulated by a light modulation element and projected and displayed by a projection lens, at least a part of components constituting a housing for accommodating the light source is provided. It was constituted by a circuit board on which an electronic circuit such as a means for supplying power to the light source was mounted.

[0012]

FIG. 1 is a sectional view showing the structure of a lamp unit in a projector device according to one embodiment of the present invention. In the figure, the lamp unit 104 is connected by a connection terminal 102 to a lamp house partially configured by a lamp connection board 103. That is, in the power supply circuit of the lamp 101 of the present embodiment, a part or the whole of the lamp house is constituted by the lamp connection board 103. By using such a configuration, since the output of the lamp power supply is directly connected to the lamp unit 104, there is a concern that wiring resistance by a cable or the like, power loss due to a connection point, electric leakage due to aging deterioration, etc. as in the conventional example. No, it can be used safely.

FIG. 2 is a sectional view showing the structure of the optical system housing in this embodiment. 7, the same reference numerals as those in FIG. 7 indicate the same components. As shown in FIG. 2A, the members constituting the optical system housing are a circuit board 80.
1,802. By using a thin component called a surface mount type, the electronic component can be mounted inside the optical system housing. Note that even a tall component of the surface mount type does not affect the optical system by mounting it on the outside of the housing. By inputting the control signal of the light modulation element from the circuit board used for the optical system housing, the signal transmission path can be shortened, and thus, the entry of noise can be suppressed low. Further, it is possible to reduce the cost by reducing the parts used for relaying signals as in the related art, and to improve the image quality by avoiding the influence of noise. It is desirable that the optical system housing absorbs unnecessary light (stray light). The image quality can be improved by using a material that does not reflect light for the surface of the circuit board material, semiconductor components, discrete components, and electrodes used on the side facing the optical system. In addition, by applying a material that suppresses light reflection to the side facing the optical system, diffused reflection can be reduced and image quality can be improved even when a commonly used electronic component or substrate material is used. In this case, by applying after mounting the electronic component, it becomes possible to completely cover the electrode, the electrode pad on the substrate, the solder surface of the electronic component, and the like, and the efficiency of suppressing diffused reflection of light increases.

As shown in FIG. 2B, when the optical systems 701 and 702 are mounted on a housing including the circuit boards 801 and 802 and data connection is required between upper and lower circuit boards, this embodiment is used. In this case, it is possible to connect the connectors 803 and 804 to the side surface of the housing using a cable 805 such as an FPC. This method has the advantages that the connection does not affect the optical system, and that the connection is made along the housing whose shape is determined, so that a stable connection against vibrations and the like can be obtained. Further, a substrate forming a pattern for connecting upper and lower circuit boards may be used as the substrate constituting the side surface of the housing. In this case, the housing can be opened and closed by using the board-to-board connector.

Further, as shown in FIG. 2C, when opening and closing of the housing is unnecessary, a board 806 having a pattern for directly connecting the upper and lower boards 801 and 802 is provided between the connectors 803 and 804. May be implemented.

As described above, by using the configuration of this embodiment, it is not necessary to provide a storage space dedicated to the circuit board in the outer peripheral case of the main body, and it is possible to reduce the size of the outer peripheral case of the main body. Therefore, a small and lightweight projector can be manufactured.

The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications and replacements can be made within the scope of the claims.

[0018]

As described above, according to the projector device of the present invention in which light from a light source is modulated by a light modulation element and a display is performed by a projection lens, components constituting a housing for accommodating the light source. Is characterized in that at least a part thereof is constituted by a circuit board on which an electronic circuit such as a power supply unit for supplying power to the light source is mounted. Further, at least a part of the components constituting the housing forming the optical path using the optical system component is constituted by a circuit board on which an electronic circuit for the optical system component is mounted. Therefore, the size of the entire apparatus can be reduced by using the power supply and the substrate of the electronic circuit as a part of the housing.

Further, since the electrodes of the light source body are directly connected to the components of the stage for supplying power to the light source on the light source circuit side, it is possible to avoid an electric leakage accident due to deterioration with time and to reduce power loss due to many contacts. Can be reduced.

Further, as a connecting member for connecting the circuit boards, a member which does not reflect light is used, or a coating which does not reflect light is applied so as not to affect the optical path.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a lamp unit in a projector device according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a structure of an optical system housing in the present embodiment.

FIG. 3 is a cross-sectional view illustrating a structure of a conventional projector device.

FIG. 4 is a view showing the appearance of a conventional lamp unit.

FIG. 5 is a side view of a conventional lamp unit and a lamp house.

FIG. 6 is a diagram showing a partial structure of a conventional projector device.

FIG. 7 is a cross-sectional view showing the structure of a conventional optical system housing.

[Explanation of symbols]

101: lamp, 102: connection terminal, 103: lamp connection board, 104: lamp unit.

Claims (4)

[Claims] 1. A projector device that modulates light from a light source with a light modulating element and projects and displays the modulated light with a projection lens, wherein at least a part of a component constituting a housing that houses the light source is A projector device, which is a circuit board on which an electronic circuit such as a power supply unit that supplies power to a light source is mounted. 2. The projector device according to claim 1, wherein a connection terminal of the power supply unit is provided directly on the housing, and is directly connected to an electrode terminal of the light source. 3. A projector device for modulating light from a light source with a light modulation element and projecting and displaying the modulated light with a projection lens, wherein a component constituting a housing forming an optical path using an optical system component. A projector device, at least a part of which is a circuit board on which an electronic circuit for the optical system component is mounted. 4. The projector according to claim 1, wherein a connection member for connecting the circuit boards does not reflect light.