JP2004157201A - Projector apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector apparatus in which, when a fault occurs in a light source being used, the light source can be replaced with a spare light source and is matched with a lighting circuit device. <P>SOLUTION: The projector apparatus ILP comprises a projector main body 1, a plurality of light sources 2, 2 arranged in the main body 1, a light source switching mechanism 3 which alternatively chooses one of the light sources 2, 2 and transfers it to a prescribed lighting position, a plurality of lighting circuit means 4, 4 which energize and turn on the light source 2, and a lighting control means 5 which actuates the lighting circuit means 4 for the light source 2 disposed in the lighting position. The light source switching mechanism 3 replaces the light source 2 suitably by turning, more preferably repetitive turning of a swing table 3b centering on a turning shaft. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device for projecting an image such as video or character information on a screen or the like for display.
[0002]
2. Description of the Related Art A conventional projector of this type is provided with a plurality of light sources as backups in order to back up a problem such as a defect in a light source being used. There is one configured to be replaced with a light source (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2-257191
The above document discloses a projection display device that collimates light from a light source, modulates the light with a transmission light valve, and modulates the light with a projection optical unit, wherein the projection display device includes a light source unit group including a collimating unit. There is described a projection display device having a function of rotating another light source unit group so that another light source unit can be used immediately. According to FIG. 1 and FIG. 2, the light source unit group includes six light source units arranged around a rotation axis parallel to the optical axis of the light source, and the pistol rotates around the rotation axis. The light source unit is configured to be replaced by rotating like a shaped magazine.
[0004]
So, for example, in order to avoid as much as possible to make the light source uncomfortable and unpleasant while you are enjoying a movie, a spare light source unit built in beforehand It is described that can be exchanged.
[0005]
In addition, the above patent document does not refer to a specific configuration of the light source unit and lighting means for lighting the light source unit. However, it is generally known that, in a device using a light source composed of an incandescent light bulb, a regular / preliminary replacement mechanism is provided to replace a regular light source with a spare light source when the regular light source becomes defective. When operating the spare replacement mechanism, it is general that only the light source is replaced and the lighting circuit means is not replaced.
[0006]
Incidentally, in the above-described projector device, a high-pressure discharge lamp is generally used as a light source. The high-pressure discharge lamp is energized and lit when a required voltage is applied by the lighting circuit means. The lighting circuit means is mainly configured by an inverter or the like formed as a semiconductor circuit.
[0007]
In addition, the lighting circuit means further includes an igniter, and outputs a high-voltage pulse from the igniter at the time of start-up and applies the pulse to the high-pressure discharge lamp, so that the discharge medium in the high-pressure discharge lamp is broken down to start lighting. Or to start. For this reason, the secondary side of the lighting circuit means has an increased dielectric strength so as to withstand a high voltage.
[0008]
However, the characteristics of the light source and the lighting circuit are different from each other, so that the desired lighting characteristics may not be exhibited unless the light source and the lighting circuit are matched. . In general, the life of the lighting circuit means is longer than that of the light source, but sometimes the lighting circuit means may be defective.
[0009]
On the other hand, when the light source unit group is rotated about a rotation axis parallel to the optical axis as in the patent document, the three-dimensional space required for the rotation mechanism becomes large, and the projector device becomes large. There's a problem.
[0010]
An object of the present invention is to provide a projector device that can be replaced with a spare light source and can be matched with lighting circuit means when a light source in use has a problem.
[0011]
It is another object of the present invention to provide a projector device in which a non-operation time due to a failure of the light source or the lighting circuit means is reduced.
[0012]
Still another object of the present invention is to provide a projector device in which a light source switching mechanism is downsized.
[0013]
According to a first aspect of the present invention, there is provided a projector apparatus; a projector apparatus main body; a plurality of light sources provided in the projector apparatus main body; A light source switching mechanism for moving to a lighting position; a plurality of lighting circuit means for energizing and lighting the light source; and a lighting control means for operating the lighting circuit means of the light source disposed at the lighting position. It is characterized by.
[0014]
In the present invention and each of the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.
[0015]
<Regarding Projector Apparatus Main Body> The “projector apparatus main body” refers to the remaining portion excluding the light source, the light source switching mechanism, the lighting circuit means, and the lighting control means from the projector apparatus. In addition, there are a rear method and a front method as a method of projecting an image, and the present invention may be any of them.
[0016]
In addition, the projector device generally includes an image signal generating unit that forms an image signal to be projected, and an image signal generated by the image signal generating unit. An optical engine that forms and projects image light by reflecting or transmitting the light to a forming unit, a light source device that generates light to be projected, a screen, and an optical system that guides the projected image light to the screen And a control means for integrally controlling each of the above components as required, and a housing for accommodating each of the components. In the above configuration, the light source, the light source switching mechanism, and the lighting circuit as the components of the present invention belong to the light source device. In addition, the lighting control means can be configured as a part of the function of the control means, but an independent configuration is also allowed if necessary.
[0017]
An example in which the projector device includes, for example, a control module, an optical engine block, a light box, a power supply, an optical system, a screen, a housing, and the like will be described below. In this configuration example, the light source, the light source switching mechanism, and the lighting circuit unit, which are the components of the present invention, can be configured as a part of a light box, and the lighting control unit can be configured as a part of a control module.
[0018]
In the above configuration example, the control module corresponds to the image signal generating means and the control means of the above-described general projector device, and includes a video board section, a signal control board section, and a microcomputer board section. The video board unit inputs and outputs a video signal to and from the outside of the projector device and supplies the video signal to the signal control board unit. The signal control board generates a drive signal for the image forming means based on the video signal and sends the signal to the optical engine block. Therefore, the video board section and the signal control board section correspond to image signal generating means of a general projector device. The microcomputer board unit corresponds to a control unit of a general projector device, and incorporates a control program of the entire projector device. In the present invention, the microcomputer board unit includes a light source monitoring unit, a control unit of a light source switching mechanism, a lighting control unit, and the like. be able to. Note that these configurations will be described later.
[0019]
The optical engine block corresponds to an optical engine of a general projector device. DLP (registered trademark) type image forming means, ie, DMD (registered trademark-digital micromirror device), image forming means including a color wheel and an index sensor, image forming means such as a liquid crystal light valve, and driving of the image forming means And a driver board. In the present invention, the optical engine block may have any configuration.
[0020]
The light box corresponds to a light source device of a general projector device, and is a unit that generates projection light and supplies it to an optical engine block, and includes a light source, a light source switching mechanism, a lighting circuit unit, and the like. ing.
[0021]
The power supply unit receives electric energy from an external commercial power supply or the like, converts the electric energy, and supplies necessary electric power to each of the above components.
[0022]
The optical system is means for guiding image light projected from the optical engine to the screen by optical means such as reflection or refraction, and is provided as necessary.
[0023]
The screen is a means for projecting and visualizing image light, and is disposed on the housing in the case of the rear type, and is disposed at a position separated from the housing in the case of the front type.
[0024]
The housing accommodates each of the above components.
[0025]
<Regarding Light Source> The light source includes a high-pressure discharge lamp, a halogen bulb, and the like, and can be integrally provided with a reflecting mirror for condensing. The amount of light generated by the light source may be set as required. In addition, a plurality of light sources are provided, and one of the light sources is placed in a predetermined lighting position by a light source exchange mechanism which will be described later as a regular use. The remaining light sources are put on standby for backup. The number of light sources is selected as required from two or more. When the light source is constituted by a high-pressure discharge lamp, the high-pressure discharge lamp may be any of a high-pressure mercury lamp and a metal halide lamp.
[0026]
<Regarding the light source switching mechanism> The light source switching mechanism is a means for selectively selecting a plurality of light sources and moving them to a predetermined lighting position. Shape, rocking type, linear moving type, etc. can be adopted. However, a configuration defined in claims 3 to 5 described below is preferable.
[0027]
Further, the light source switching mechanism can be configured to automatically or manually switch the light source. For automatic switching, for example, a light source monitoring means for detecting electrically, optically or thermally is provided to monitor the lighting state of the light source. The light source can be automatically switched by operating the switching mechanism. In order to switch the light source manually, the light source switching mechanism may be operated manually, or the light source may be switched by driving a motor by operating a manual switch.
[0028]
<Regarding Lighting Circuit Means> The lighting circuit means is a means for energizing and lighting the light source, and may be either AC lighting or DC lighting. In the case of AC lighting, adopt a circuit configuration consisting mainly of a chopper such as a step-down chopper or a step-up chopper that obtains a required DC voltage, and an inverter such as a full-bridge inverter that converts the DC voltage obtained from the chopper into AC. Can be. In the case of DC lighting, a circuit configuration mainly including a chopper such as a step-down chopper or a step-up chopper that obtains a required DC voltage can be employed. In both AC lighting and DC lighting, an igniter can be added to the above configuration to start the high pressure discharge lamp. The igniter is connected to the output terminal of the above configuration.
[0029]
Although a plurality of lighting circuit means are provided, the number thereof can be set to any number of two or more as desired. That is, the number of lighting circuit units may be the same as the number of light sources, or may be different. When the number of lighting circuit units is the same as the number of light sources, a fixed connection may be established in a one-to-one relationship in advance, or a switchable relationship may be adopted. In this case, the switching may be performed on either the input side or the output side of the lighting circuit means. If the number of lighting circuit means is different from the number of light sources, switching may be performed on the output side of the lighting circuit means. In consideration of the probability of occurrence of malfunctions in the lighting circuit means and the light source, the former can be smaller than the number of light sources because the probability is smaller in the former case. For example, two lighting circuit means may be provided, and three or more light sources may be provided.
[0030]
<Regarding lighting control means> The lighting control means is a means for operating the lighting circuit means of the light source arranged at the lighting position. Means to control. For example, this means that a switch is operated so that power is connected only to lighting circuit means connected to a light source at a lighting position among a plurality of lighting circuit means. It goes without saying that applying a voltage for lighting to the light source at the lighting position and lighting it involves operation of switches and the like separately provided by the user of the projector device.
[0031]
<Operation of the present invention> Since the present invention is configured as described above, the light source at the predetermined lighting position is controlled by the lighting control means as usual and the lighting circuit means selected from a plurality of lighting circuits means. It is energized and turned on. At the time of lighting, the light emission becomes image light in the projector device main body and is projected on a screen, so that an image is displayed on the screen. This will be described in more detail as follows. That is, the image signal generated from the image signal generating means of the projector main body is converted into an image by the image forming means in the image engine. On the other hand, the light emitted from the light source is condensed and illuminated on the image of the image forming means to become image light, and when the light is projected on the screen by the projection lens in the image engine, the image is displayed on the screen.
[0032]
By the way, when the normal light source has a defect or other problem, the light source switching mechanism operates automatically or manually, and the standby light source moves to a predetermined lighting position instead of the normal light source as a standby light source. An exchange takes place. At this time, since a plurality of lighting circuit means are prepared in advance, when replacing with a spare light source, from among them, check the matching with a new light source, select the lighting circuit means to be used, and use a switch or the like. Can be connected to light source and power supply. However, in this case, by connecting the light source and the lighting circuit means in a one-to-one relationship after matching has been performed in advance, the labor and time required for checking the matching each time can be saved.
[0033]
On the other hand, when a malfunction occurs in the lighting circuit means, the lighting circuit means can be replaced with another standby lighting circuit means. In the case where the light source and the lighting circuit means are connected in a one-to-one relationship in advance as described above, or when there is a problem in matching with the light source to be used, the light source can be replaced together.
[0034]
After replacing the light source and the lighting circuit means, the lighting circuit control means controls the light source at a predetermined lighting position so that the light source can be operated.
[0035]
Since the present invention operates as described above, when the light source is replaced with a spare one, it can be replaced with a lighting circuit means that can be matched, and therefore, the image is the same as before the replacement. The display can be performed while the interruption time due to the trouble is shortened as much as possible.
[0036]
A projector device main body; a plurality of light sources disposed in the projector device main body; a light source switching mechanism for selectively selecting the plurality of light sources and moving the plurality of light sources to a predetermined lighting position. A plurality of lighting circuit means of the same number as the light sources which are connected in advance to the plurality of light sources in a one-to-one relationship and energize and light the light sources; and lighting circuit means connected to the light sources arranged at the lighting positions. Lighting control means to be activated.
[0037]
The present invention, in the first aspect of the present invention, defines a preferable configuration, and requires that a plurality of light sources and a plurality of lighting circuit means are connected in advance in a one-to-one relationship.
[0038]
Although the plurality of light sources are moved by the light source switching mechanism, the lighting circuit means may be arranged in the light source switching mechanism so as to move together with the light sources, or may be arranged in a fixed position separately from the light source switching mechanism. .
[0039]
Thus, since the present invention has the above configuration, the time required for replacing the light source or the lighting circuit means is extremely short, and the non-operation time of the projector device due to the occurrence of a defect in the light source or the lighting circuit means is reduced. it can.
[0040]
In addition, since the light source and the lighting circuit can be matched in advance, the image display quality can be maintained satisfactorily even after the replacement.
[0041]
A projector device according to a third aspect of the present invention includes: a projector device main body; a plurality of light sources provided in the projector device main body; and a light source disposed in a lighting position, disposed along a direction substantially perpendicular to an optical axis of the light source. A light source switching mechanism for selectively rotating a plurality of light sources and moving the light sources to a predetermined lighting position by rotating about a given rotation axis; and energizing at least the light sources provided at the lighting positions And lighting control means for operating the lighting circuit means of the light source disposed at the lighting position.
[0042]
The present invention differs from the preceding claims in that the structure and operation of the light source switching mechanism are defined.
[0043]
That is, the light source switching mechanism rotates about the rotation axis. In the present invention, “rotation” means a rotation operation within a range of less than one rotation about the rotation axis. For this reason, it is only necessary to connect the light source and the lighting circuit means with a margin with an insulating covering conductor, and the structure can be simplified. As a result, the wiring does not get in the way or is not damaged in the operating range of the light source switching mechanism.
[0044]
The rotation axis is arranged along a direction substantially perpendicular to the optical axis of the light source. As a result, the light source switching mechanism rotates in a plane parallel to the optical axis, so that a required three-dimensional space can be reduced. Further, it is easy to replace a light source that is not in the predetermined lighting position with a new light source.
[0045]
The lighting circuit means may be arranged in the light source switching mechanism so as to move together with the light source, or may be fixed at a stationary position.
[0046]
According to a fourth aspect of the present invention, in the projector device of the third aspect, the light source switching mechanism is characterized in that the rotation thereof is a reciprocating rotation operation.
[0047]
The present invention is a configuration suitable for a case where the number of light sources is even, especially two.
[0048]
That is, in the present invention, “reciprocating rotation” means rotating left and right alternately. Therefore, the light sources are preferably arranged symmetrically left and right with respect to the center of the rotation range of the light source switching mechanism. Also, by restricting the rotation range to within ± 180 °, even if the rotary current collecting mechanism is omitted when wiring between the light source and the lighting circuit means, the wiring is slightly twisted and is not damaged. Therefore, the structure can be simplified.
[0049]
Then, in the present invention, the replacement of the light source is performed by driving the light source switching mechanism and rotating the light source in one of the left and right directions to move the standby light source not at the predetermined lighting position to the predetermined lighting position. Since the defective light source deviates from the predetermined lighting position with the replacement, the replacement with a new light source is facilitated. At the time of the next replacement, the light source switching mechanism moves in the other direction, and the light source is replaced.
[0050]
A projector device according to a fifth aspect of the present invention is a projector device main body; a plurality of light sources disposed in the projector device main body; and disposed along a direction substantially perpendicular to the optical axis of the light source disposed in the lighting position. A light source switching mechanism for selectively rotating a plurality of light sources and moving the light sources to a predetermined lighting position by rotating about a given rotation axis; and a one-to-one relationship with the plurality of light sources in advance. A plurality of lighting circuit means connected and arranged at a fixed position, wherein a wiring between the light source and the light source extends close to a rotation axis of the light source switching mechanism and urges the light source to emit light; Lighting control means for operating lighting circuit means connected to the light source disposed at the position.
[0051]
The present invention has both the characteristic features of the second and third aspects of the invention.
[0052]
That is, the light source switching mechanism is configured to perform rotation about a rotation axis disposed along a direction substantially perpendicular to the optical axis of the light source disposed at the lighting position, and a plurality of lighting circuits. Since the means is connected in advance to the plurality of light sources in a one-to-one relationship and is disposed at a fixed position, the light source switching mechanism can be further downsized, and the projector apparatus can be downsized. Instead, the structure becomes simple, light, and inexpensive.
[0053]
Further, the connection means between the plurality of lighting circuit means and the plurality of light sources disposed at the fixed position is not limited to a specific configuration, but preferably has a configuration in which wiring is directly performed by an insulated conductor. In this case, if the wiring extends so as to approach the rotation axis of the light source switching mechanism, it is possible to reduce the twist of the wiring even with a short wiring length and not to affect the rotation operation. . Further, if a plurality of lighting circuit means are arranged above the light source switching mechanism, the wiring length can be further reduced.
[0054]
Embodiments of the present invention will be described below with reference to the drawings.
[0055]
1 to 8 show a first embodiment of a projector device according to the present invention. FIG. 1 is a front view, FIG. 2 is a right side view, FIG. 3 is a block circuit diagram of the entire projector device, and FIG. FIG. 5 is a conceptual cross-sectional view of a light source and lighting circuit means, FIG. 6 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means and lighting control means, and FIG. FIG. 8 is a conceptual perspective view showing the operation principle of the optical engine. In the present embodiment, the projector device ILP includes a projector device main body 1, a light source 2, a light source switching mechanism 3, a lighting circuit unit 4, and a lighting control unit 5.
[0056]
The projector device main body 1 means the remaining portion of the projector device ILP excluding the light source 2, the light source switching mechanism 3, the lighting circuit means 4, and the lighting control means 5, and as shown in FIGS. 1b, an optical engine block 1c, and an optical system 1d, as shown in FIG. 3, a control module 1e, a light box 1f, and a power supply unit 1g.
[0057]
The housing 1a has a required space inside and accommodates each component described below.
[0058]
The screen 1b is supported on the front surface of the housing, projects image light from the rear surface, and displays an image for monitoring from the front. Therefore, this projector device ILP is a rear type.
[0059]
As shown in FIG. 3, the optical engine block 1c includes a DMD driver board 1c1, an index sensor 1c2, a color wheel 1c3, a cooling fan 1c4, and condenser lenses 1c5, DMD 1c6, and a projection lens 1c7 shown in FIG. That is, the optical engine block 1c is of the DLP type. The DMD driver board 1c1 drives the DMD 1c6 and drives the color wheel 1c3 in synchronization with the index sensor 1c2. The cooling fan 1c4 cools the light source 2.
[0060]
The optical system 1d includes first and second reflecting mirrors 1d1 and 1d2, as shown in FIG.
[0061]
The control module 1e includes a video board 1e1, a signal control board 1e2, and a microcomputer board 1e3. The video board 1e1 has a video signal input / output port. The signal control board 1e2 has a digital signal link input / output port and an RGB input port, and generates a DMD drive signal based on a video signal. The microcomputer board 1e3 contains a control program, and controls the signal control board 1e2, the optical engine block 1c, and a light box 1f described later. Further, it also serves as lighting control means 5 described later.
[0062]
The light box 1f includes a light source 2, a light source switching mechanism 3, lighting circuit means 4, and a cooling fan 1f1, which will be described later. The cooling fan 1f1 cools the entire system.
[0063]
The power supply unit 1g is composed of a power switch 1g1, a power factor improvement board 1g2, and a low-voltage DC power supply 1g3. Supply the required power.
[0064]
As shown in FIG. 3 and FIG. 4, the light source 2 comprises a light source unit in which an ultra-high pressure mercury lamp 2a and a reflecting mirror 2b mainly composed of a paraboloid of revolution are integrated, and a pair of the light sources is described later. The switching mechanism 3 is disposed so as to face the swing table 3b back to back.
[0065]
As shown in FIGS. 3 and 4, the light source switching mechanism 3 includes a rotating shaft 3a, a swing table 3b, a bearing 3c, a gear mechanism 3d, a motor 3e, a position detection switch 3f, and the like. The rotating shaft 3a is fixed to the swing table 3b, and is rotatably supported by a bearing 3c. The gear mechanism 3d rotates the rotation shaft 3a. The motor 3e (see FIG. 3) drives the gear mechanism 3d. The position detection switch 3f detects the turning position of the swing table 3b and controls the lighting control means 5 of the microcomputer board 1e3 to input a detection signal to perform position control. Then, one of the pair of light sources 4, 4 faces the condenser lens 1c5 of the optical engine block 1c as a regular light source. Therefore, the remaining light sources are reserved. Although not shown, the light box 1f is provided with a manual switch, and by operating this switch, the light source can be switched manually or automatically.
[0066]
The lighting circuit means 4 is arranged in a pair, and is mounted on a fixed shelf 6 as shown in FIG. In the pair of lighting circuit means 4, 4, an insulating coating conductor 7 connecting the output end and the light source 2 extends close to an extension of the rotation shaft 3a of the swing table 3b.
[0067]
As shown in FIG. 6, the input terminals of the pair of lighting circuit units 4 are connected in parallel to the power source AC, and the output terminals of the pair of lighting circuit units 4 are connected to the respective light sources 2. Are fixedly connected in a one-to-one relationship. The operation of each lighting circuit means 4 is controlled by a lighting control means 5 described later.
[0068]
Further, the lighting circuit means 4 has a circuit as shown in FIG. That is, the lighting control unit 5 includes a DC power supply 11, a chopper 12, a chopper control unit 13, a lamp current detection unit 14, a lamp voltage detection unit 15, an igniter 16, and a full bridge inverter 17.
[0069]
The DC power supply 11 is a means for supplying a DC input voltage to the chopper 12 under the control of the lighting control means 5 described later, and is connected to the power supply unit 1g and is composed of a rectified DC power supply for rectifying AC. . If necessary, an electrolytic capacitor 11a is connected in parallel to perform smoothing.
[0070]
The chopper 12 is a DC-DC conversion circuit that converts a DC voltage into a DC voltage having a required value, and inputs a DC voltage having a required voltage to a full-bridge inverter 17 described later. When the DC power supply voltage is low, a boost chopper is used, and when it is high, a step-down chopper is used.
[0071]
The chopper control means 13 controls the chopper 12. That is, the chopper control unit 13 generates a constant power control signal and performs constant power control of the chopper 12 by feedback-inputting the respective detection signals corresponding to the lamp current and the lamp voltage as described later.
[0072]
The lamp current detecting means 14 is inserted in series with the lamp via the full bridge inverter 17, detects a current corresponding to the lamp current, and inputs the control to the chopper control means 13.
[0073]
The lamp voltage detecting means 15 is similarly connected in parallel with the lamp via the full bridge inverter 17, detects a voltage corresponding to the lamp voltage, and performs control input to the chopper control means 13.
[0074]
The igniter 16 is interposed between the full-bridge inverter 17 and the light source 2 and is configured to apply a high-voltage pulse voltage to the light source 2 at the time of starting.
[0075]
The full-bridge inverter 17 includes a bridge circuit 17a including four MOSFETs Q1, Q2, Q3 and Q4, a gate drive circuit 17b for alternately switching the MOSFETs Q1 and Q3 of the bridge circuit 17a and Q2 and Q4, and a polarity inversion circuit INV. The DC voltage from the chopper 12 is converted into a rectangular wave low-frequency AC voltage by the above-described switching, and is applied to the light source 2 to be lit by the low-frequency AC.
[0076]
As shown in FIG. 6, the lighting control means 5 determines whether or not the light source 2 connected to the output terminal of the pair of lighting circuit means 4, 4 in accordance with a control input from the position detection switch 3f of the light source switching means 3 has a predetermined value. Is controlled so that the DC power supply can be applied to the person at the lighting position of. The lighting control means 5 stops the operation of the other lighting circuit means 4 and monitors the lighting state of the light source based on the operating state of the lighting circuit means 4. Is caused, the light source switching means 3 starts the light source switching operation.
[0077]
The lighting control means 5 is configured as a part of the function of the microcomputer board 1e3 of the control module 1e shown in FIG.
[0078]
Next, the operation of the projector device according to the first embodiment of the present invention having the above-described configuration will be described. That is, the video signal input from the input port of the video board 1e1 is transmitted to the signal control board 1e2, converted into an image signal, and transmitted from the DMD driver board 1c1. When the DMD driver board 1c1 drives the DMD 1c6, a large number of micromirrors corresponding to the pixels aligned thereon are displaced according to the image to control the degree of reflection for each pixel.
[0079]
On the other hand, when the light source 2 at the predetermined lighting position is energized and turned on by the lighting circuit means 4 under the control of the lighting control means 5 as a regular light source, the light source 2 generates white light and passes through the color wheel 1c3. As a result, RGB monochromatic light is successively extracted and enters the condenser lens 1c5. The sequential RGB monochromatic light collimated by the condenser lens 1c5 enters the DMD 1c6, the reflection of which is controlled for each pixel, and the image light of the sequential RGB monochromatic light is formed. The image light is reflected by the first and second reflecting mirrors 1d1 and 1d2 so that the optical path is bent and projected on the screen 1b. Is displayed.
[0080]
By the way, when a malfunction such as a point of failure occurs in the regular light source, the lighting control means 5 detects this and stops the operation of the lighting circuit means 2 connected to the regular light source, and at the same time, energizes the motor 3e of the light source switching means 3. Therefore, the swing table 3b swings. When the position detection switch 3f detects that the swing table 3b has moved to a predetermined position, the power supply to the motor 3e is stopped, so that the swing table 3b stops. As a result, the regular light source moves to the standby position, and the remaining spare light source moves to the predetermined lighting position in exchange, and at the same time, the lighting control means 5 activates the lighting circuit means 4 connected to the spare light source. As a result, the projector device ILP continues the image display operation again. Although not shown, when the spare light source is used, the pilot light blinks at one corner of the screen 1b under the control of the microcomputer board 5, and is displayed. .
[0081]
Therefore, when the user knows that the light source 2 has been replaced by the flashing of the pilot light, the user replaces the failed light source that has moved to the standby position with a normal light source, and then switches the light source switching means. By operating the manual switch provided in 3, the swinging table 3b repeatedly turns in the opposite direction and returns, so that the replaced normal light source moves to the lighting position as a normal light source and returns to the initial state.
[0082]
Hereinafter, other embodiments of the present invention will be described with reference to FIGS. In each figure, the same parts as those in FIGS.
[0083]
FIG. 9 is a plan view showing a light source switching mechanism and lighting circuit means according to a second embodiment of the projector device of the present invention. In the present embodiment, a pair of lighting circuit means 4 and 4 are mounted together with the light source 2 on the swing table 3b of the light source switching means 3. Therefore, although not shown in the drawings, the configuration is such that the insulated conductors connected to the input terminals of the lighting circuit means 4 and 4 are arranged as shown in FIG. 5 or arranged via a rotary current collecting mechanism. I do.
[0084]
FIG. 10 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means, and lighting control means in the third embodiment of the projector device of the present invention. In the present embodiment, the changeover switches SW1 and SW2 are inserted into the input ends of the pair of lighting circuit means 4 and 4 to switch the lighting circuit means 4 for lighting the light source.
[0085]
FIG. 11 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means and lighting control means in a fourth embodiment of the projector device of the present invention. The present embodiment is configured such that the changeover switches SW3, SW4 are inserted into the output terminals of the pair of lighting circuit means 4, 4 to switch the lighting circuit means 4 for lighting the light source.
[0086]
FIG. 12 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means and lighting control means in a fourth embodiment of the projector device of the present invention. This embodiment is configured using a pair of lighting circuit means 4A, 4B and three light sources 2A, 2B, 2C.
[0087]
That is, the input terminals of the pair of lighting circuit means 4A and 4B are fixedly connected to the AC power supply AC. On the other hand, the output terminals of the pair of lighting circuit means 4A, 4B are provided with selection switches SW5, SW6, SW7 so that the three light sources 2A, 2B, 2C can be selectively connected. More specifically, the selection switch SW5 can connect the light source 2A to any of the lighting circuit means 4A and 4B via the selection switch SW5. Similarly, the light sources 2B and 2C can be connected to the lighting circuit means 4A and 4B via the selection switches SW6 and SW7 via the selection switches SW6 and SW7.
[0088]
According to the first aspect of the present invention, there are provided a projector device main body, a plurality of light sources, a light source switching mechanism for selectively selecting the plurality of light sources and moving them to a predetermined lighting position, and a plurality of lighting devices. By providing the circuit means and the lighting control means for operating the lighting circuit means of the light source arranged at the lighting position, when the light source in use becomes defective, it can be replaced with a spare light source and turned on. It is possible to provide a projector device capable of matching with circuit means.
[0089]
According to the invention of claim 2, the projector device main body, a plurality of light sources, a light source switching mechanism for selectively selecting the plurality of light sources and moving the plurality of light sources to a predetermined lighting position, A plurality of lighting circuit means are connected in a one-to-one relationship to energize and light the light source, and the same number of lighting circuit means, and lighting control means for operating the lighting circuit means connected to the light source disposed at the lighting position. By this, when a problem occurs in the light source in use, the light source can be replaced with a spare light source and matching with the lighting circuit means can be obtained in advance, so that the non-operation time due to the occurrence of a defect in the light source or the lighting circuit means has been reduced. A projector device can be provided.
[0090]
According to the third aspect of the invention, the projector apparatus main body, the plurality of light sources, and the rotation axis disposed along a direction substantially perpendicular to the optical axis of the light source disposed at the lighting position are centered. A light source switching mechanism for rotating and selectively selecting a plurality of light sources to move to a predetermined lighting position; lighting circuit means for energizing at least the light source disposed at the lighting position to light; By providing the lighting control means for operating the lighting circuit means of the light source disposed at the position, it is possible to provide a projector device in which the light source switching means is reduced in size.
[0091]
According to the fourth aspect of the present invention, the light source switching mechanism can provide a projector device in which the light source can be easily replaced because the rotation is a reciprocating rotation operation.
[0092]
According to the fifth aspect of the present invention, the projector apparatus main body, the plurality of light sources, and the rotation axis disposed along a direction substantially perpendicular to the optical axis of the light source disposed at the lighting position are centered. A light source switching mechanism for rotating and selectively selecting a plurality of light sources and moving them to a predetermined lighting position; and a plurality of light sources connected in advance in a one-to-one relationship and arranged at a fixed position. The wiring between the light source and the light source extends in the vicinity of the rotation axis of the light source switching mechanism, and is connected to a plurality of lighting circuit means for urging and lighting the light source, and the light source disposed at the lighting position. By providing the lighting control means for operating the lighting circuit means, it is possible to provide a projector device having a simple structure.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment of a projector device of the present invention.
FIG. 2 is a right side view of the same.
FIG. 3 is a block circuit diagram of the entire projector device.
FIG. 4 is a conceptual plan view of the light source switching mechanism.
FIG. 5 is a conceptual cross-sectional view of a light source and lighting circuit means.
FIG. 6 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means, and lighting control means.
FIG. 7 is a circuit diagram of the lighting circuit means.
FIG. 8 is a conceptual perspective view showing the operation principle of the optical engine.
FIG. 9 is a plan view showing a light source switching mechanism and lighting circuit means according to a second embodiment of the projector device of the present invention.
FIG. 10 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means, and lighting control means in a third embodiment of the projector device of the present invention.
FIG. 11 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means, and lighting control means in a fourth embodiment of the projector device of the present invention.
FIG. 12 is a block circuit diagram showing a connection relationship between a light source, lighting circuit means, and lighting control means in a fourth embodiment of the projector device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Projector apparatus main body, 1e ... Control module, 1c ... Optical engine block, 1f ... Light box, 1g ... Power supply part, 2 ... Light source, 3 ... Light source switching means, 4 ... Lighting circuit means, 5 ... Lighting control means

Claims (5)

A projector device body;
A plurality of light sources arranged in the projector device body;
A light source switching mechanism for selectively selecting a plurality of light sources and moving them to a predetermined lighting position;
A plurality of lighting circuit means for energizing and lighting the light source;
Lighting control means for operating the lighting circuit means of the light source disposed at the lighting position;
A projector device comprising: A projector device body;
A plurality of light sources arranged in the projector device body;
A light source switching mechanism for selectively selecting a plurality of light sources and moving them to a predetermined lighting position;
A plurality of lighting circuit means of the same number as the number of light sources which are connected in advance to the plurality of light sources in a one-to-one relationship and energize and light the light sources;
Lighting control means for operating lighting circuit means connected to the light source disposed at the lighting position;
A projector device comprising: A projector device body;
A plurality of light sources arranged in the projector device body;
A plurality of light sources are selectively selected by rotating around a rotation axis disposed along a direction substantially perpendicular to the optical axis of the light source disposed at the lighting position, and a predetermined lighting is performed. A light source switching mechanism for moving to a position;
Lighting circuit means for energizing and lighting a light source provided at least in a lighting position;
Lighting control means for operating the lighting circuit means of the light source disposed at the lighting position;
A projector device comprising: 4. The projector device according to claim 3, wherein the light source switching mechanism rotates reciprocally. A projector device body;
A plurality of light sources arranged in the projector device body;
A plurality of light sources are selectively selected by rotating around a rotation axis disposed along a direction substantially perpendicular to the optical axis of the light source disposed at the lighting position, and a predetermined lighting is performed. A light source switching mechanism for moving to a position;
A plurality of light sources are connected in advance in a one-to-one relationship and are arranged at fixed positions. Wiring between the light sources extends close to the rotation axis of the light source switching mechanism. A plurality of lighting circuit means for energizing and lighting;
Lighting control means for operating lighting circuit means connected to the light source disposed at the lighting position;
A projector device comprising:

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