JP2000131759A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make use of the characteristic of a superior lamp by providing a controlling means which executes a control based on the information of an illuminating means corresponding to the kind of a lamp mounted on the means. SOLUTION: A data inputting section 36 is provided on the side surface of the external box of a projector. By pressing buttons 40, 41, 42 and 46, normal output setting made, initial emitted light quantity setting made, end of service life emitted light quantity setting made and deviation amount setting made at the initial position of a lamp holding section modes are given respectively. If various data are inputted using ten keys 37 or up and down keys 38, the inputted data are displayed on a display section 43. If a set button 39 is pushed, the displayed data are set in a memory. A control section fetches the inputted information of an illuminating section. Based on the fetched data, positions of a lamp and a lamp unit are controlled and the driving voltage of the lamp is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector for illuminating a display means with illumination means comprising a lamp and a reflector to generate a projection image.

[0002]

2. Description of the Related Art FIG. 33 shows a configuration example of a conventional projector in a horizontal sectional view including an optical axis of a projection lens. The projector 114 includes an illumination unit, a display unit, and a projection unit.
The illumination unit performs uniform illumination on the display unit. The display unit separates the illumination light into three colors of red (R), green (G), and blue (B), converts the illumination light of each color into an optical image of each color, and then converts the illumination light of each of the three colors. Combine the optical images. The projection unit projects the synthesized optical image.

The display unit includes liquid crystal panels 111R, 111G, 111B for converting illumination light of each color into an optical image, field lenses 110R, 110G, 110B provided on the front of each of the liquid crystal panels 111R, 111G, 111B, a specific wavelength. Dichroic mirror 1 that transmits only light in the region
06a, 106b, folding mirrors 107a, 107
b, 107c, a condenser lens 108, a relay lens 109, and a cross dichroic prism 112.

[0004] The dichroic mirror 106a transmits only R light. The dichroic mirror 106b is
Only the light of The R light transmitted through the dichroic mirror 106b is reflected by the return mirror 107a, and is transmitted through the field lens 110R.
Illuminate 11R. Dichroic mirror 106a, 1
G light reflected by the optical lens 06b
After passing through 10G, the liquid crystal panel 111G is illuminated. The B light reflected by the dichroic mirror 106a and transmitted through the dichroic mirror 106b is transmitted to the condenser lens 108, the return mirror 107b, and the relay lens 10b.
9. Folding mirror 107c, field lens 110
The liquid crystal panel 111B is illuminated via B.

Since the distance between the liquid crystal panel 111B and the light source is different from the distance between the liquid crystal panels 111R and 111G and the light source, the illumination state of the liquid crystal panel 111B is changed using the condenser lens 108 and the relay lens 109.
The illumination state is the same as 1R and 111G. The liquid crystal panels 111R, 111G, 111B are telecentricly illuminated by the field lenses 110R, 110G, 110B.

A bonding surface 112a of the cross dichroic prism 112 is provided with a dichroic coat that reflects only B light, and a bonding surface 112b is provided with a dichroic coat that reflects only R light. Each liquid crystal panel 11
In 1R, 111G, and 111B, R, G, and B optical images are formed, respectively. The image light of these optical images is incident on the cross dichroic prism 112, the R light is reflected by the joint surface 112b, and the B light is reflected by the joint surface 112a to be combined to form a projection system. Provided to the lens 113. The projection lens projects the incident image light on a screen (not shown).

Next, the lighting section will be described. The lighting unit includes a light source 101 composed of a metal hide lamp and a light source 10.
A reflector 102 composed of a spheroidal reflecting mirror that reflects the light emitted in 1 to make it substantially parallel light, a first lens array 103 in which a plurality of lens cells are arranged in a matrix, and a second lens An array 104 and a superposition lens 105 are provided.

The first lens array 103 has an optically conjugate relationship with the liquid crystal panels 111R, 111G, and 111B. Each lens on the second lens array 104 has an optically conjugate relationship with the light source 101.

The white light emitted from the light source 1 is reflected by the reflector 102 and is incident on the first lens array 103. Then, after being separated into a plurality of light beams by the first lens array 103, the light beams are incident on the second lens array 104, and a plurality of light source images are formed. That is, each lens of the second lens array 104 is a secondary light source.

A plurality of light beams emitted from the second lens array 104 are superimposed by a superimposing lens 105 and provided to a display unit. The light beams divided as described above are superimposed on each other and the liquid crystal panels 111R,
1G, 111B, the liquid crystal panel 111R,
111G and 111B are illuminated with a uniform light amount distribution. Therefore, a color image is projected with a uniform illuminance distribution.

[0011]

One of the problems in the conventional projector is to project a brighter image more efficiently. 2. Description of the Related Art Conventionally, various projectors provided with means for achieving the above object have been disclosed. For example, in the projector of the related art described above shown in FIG. 33 as well, a scheme has been devised in which uniform illumination is achieved by the configuration of the illumination unit, and a bright image is efficiently projected using the light from the light source.

In recent years, lamps used as light sources have been developed. By using a bright lamp,
Bright illumination can be easily obtained. For example, an ultra high pressure lamp (UHP lamp) is known as a recently developed lamp. UHP lamps are superior in that they have higher efficiency than metal halide lamps used as light sources in the above-mentioned conventional technology. FIG. 34 shows a graph in which the relationship between the brightness of the two lamps and the power consumption is schematically compared.

In FIG. 34, the horizontal axis represents the brightness and the vertical axis represents the power consumption, and the tendency of the metal halide lamp is indicated by a dashed line 15.
At 0, the trend of the UHP lamp is shown by the solid line 151. For example, when obtaining the brightness I1, the power consumption of the metal halide lamp is P1, whereas the power consumption of the UHP lamp is P2 smaller than P1. On the other hand, in the case of the UHP lamp, when the power consumption is P1, the brightness I2 is obtained which is brighter than I1.

That is, comparing the metal halide lamp and the UHP lamp, the UHP lamp can achieve the same brightness with less power consumption and can display brighter without increasing the power consumption. . When the power consumption increases, the running cost increases. Further, when the power consumption increases, there is a problem that the life of the lamp is shortened, and it is difficult to display an image with stable brightness for a long time.

In each projector, there is a tendency to use the most excellent lamp as a whole when designing. Recently, projectors equipped with UHP lamps have also been commercialized. As development progresses further, there is a high possibility that a new technology lamp, such as that shown by the straight line 152 in FIG.

However, in the conventional projector, the types of lamps that can be used are limited to one preset type, and light emission control such as application of a voltage is performed based on the rating of the lamp. Therefore, even if the development of the lamp progresses, the latest lamp other than the set type of lamp cannot be used. In order to adopt the latest lamp, it is necessary to replace the projector body with a lamp corresponding to the latest lamp, which is uneconomical.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projector capable of taking advantage of excellent lamp characteristics in view of the above problems.

[0018]

According to one aspect of the present invention, there is provided a display means for spatially modulating illumination light based on a video signal to form an optical image for projection, and a light source. A lamp for generating the illumination light, comprising a reflector for the lamp and a reflector arranged to surround the lamp, and a projector having a projection optical system for projecting the optical image on a projection screen, the projector for the light source The lamp is replaceable with a lamp of a different type, and input means for inputting information on the lighting means according to the type of lamp installed, and control means for performing control based on the information input by the input means And a configuration having:

In the above configuration, it is assumed that the information of the illuminating means according to the type of the attached lamp includes the rated output of the lamp. The control means causes the lamp to emit light in accordance with the acquired rated output of the lamp.

According to a second aspect of the invention, in the projector according to the first aspect, the lamp is replaced independently.

According to a third aspect of the present invention, in the projector according to the first aspect, the lamp is replaced together with the reflector.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> FIG. 1 shows a simplified overall configuration diagram of a projector according to a first embodiment of the present invention. The light emitted by the lamp 1 held by the fixing member 17 is reflected by the reflector 2 composed of a reflection mirror having a spheroidal shape, and enters the cross dichroic prism 3. The reflector 2 has a notch 2a centered on the apex, and the lamp 1 is actually fixed by a fixing member 17 in a state of being inserted into the notch 2a. 1 are arranged so as to surround them. However, in FIG. 1, the reflector 2 is shown separated from the lamp 1 so that each component can be easily understood.
An illumination section is formed by the lamp 1, the reflector 2, and the fixing member 17. In the lighting section, the lamp 1 can be replaced with a different type of lamp.

The joining surface 3a of the cross dichroic prism 3 is provided with a dichroic coat that reflects only light in the R wavelength range, and the joining surface 3b is similarly provided with a dichroic coat that reflects only light in the B wavelength range. ing.

Therefore, the cross dichroic prism 3
Of the light incident on the liquid crystal panel 5R that forms an R optical image is reflected by the bonding surface 3a and then reflected by the reflection mirrors 4a and 4b. The light in the wavelength range B is reflected by the bonding surface 3b and then reflected by the reflection mirror 4
The light illuminates the liquid crystal panel 5B that is reflected by c and 4d and forms the B optical image. The light in the G wavelength range is transmitted without being reflected by the cross dichroic prism 3, and illuminates the liquid crystal panel 5G that forms the G optical image.

Each of the liquid crystal panels 5 R, 5 G, and 5 B is a transmissive liquid crystal panel. Here, the illumination light is converted into an optical image of each color, and is then provided to the cross dichroic prism 6. Bonding surface 6a of cross dichroic prism 6
Is provided with a dichroic coat that reflects only light in the R wavelength range, and similarly, the bonding surface 6b is provided with a dichroic coat that reflects only light in the B wavelength range.

Of the light incident on the cross dichroic prism 6, the R image light emitted from the liquid crystal panel 5R is reflected by the bonding surface 6a and the B image light emitted from the liquid crystal panel 5B.
Is reflected by the joint surface 6b, and the G image light emitted from the liquid crystal panel 5G is not reflected by any surface. Therefore, the cross dichroic prism 6 combines and emits the image lights of the three colors. This light is projected on a screen (not shown) by the projection lens 7. Reference numeral 8 denotes a base to which each component is fixed.

FIG. 2 shows a detailed configuration diagram of the illumination unit. In FIG. 2, the reflector 2 is omitted. In this projector, the lamp 1 can be replaced with a different type of lamp as described above. Therefore, the fixing member 17
Has a holding member 9 capable of holding different types of lamps and a lamp position adjusting means capable of moving the lamp to an optimum position according to the attached lamp. The lamp position adjusting means includes an x direction adjusting member 10, a y direction adjusting member 11, and a z direction adjusting member 12.

Depending on the position of the lamp, the amount of illumination light incident on the position of the liquid crystal panel and the illumination area differ.
When the lamp is in the optimum position, the center axis of the lamp matches the optical axis of the reflector and the projection lens of the projector,
In addition, the light emission center point of the lamp is at a predetermined position on the optical axis. Note that the predetermined position is determined in advance at a position calculated to illuminate the liquid crystal panel most efficiently at the time of design. Due to differences in the shape of the light emitting parts of the lamps, the optimum positions of the light emission center points of all the lamps are not necessarily the same.However, the light emission center points are determined by averaging or using data corresponding to an ideal lamp. The value of the optimum position is determined as one. Since the reflector 2 is immovable, when the lamp is at the optimum position, the positional relationship between the lamp and the reflector is also the optimum.

The lamp 1 comprises a light emitting section 1a and a held section 1b. The held portion 1b is formed of a magnetic material. In this embodiment, the replaceable lamp has the same basic configuration as the lamp 1, and has a light-emitting portion and a held portion made of a magnetic material.

In the lamp position adjusting means, x direction, y direction
The direction and the z direction are directions perpendicular to each other. A direction horizontal to the base 8 and perpendicular to the optical axis is defined as an x direction, a direction perpendicular to the base 8 and the optical axis is defined as a y direction, and a direction parallel to the base 8 and the optical axis is defined as a z direction.

The x-direction adjustment member 10 and the y-direction adjustment member 1
1, the z-direction adjusting member 12 is provided in the x direction, the y direction, and the z direction, respectively.
Bases 10a, 11a, 12a having grooves in the directions, and flat bar-shaped moving members 10b, 11 slidably fitted in the grooves.
b, 12b, screw rollers 10c, 11c, 12c attached to one end of the bases 10a, 11a, 12a so as to be in contact with the moving members 10b, 11b, 12b, and screw rollers 10c, 11c, 12c which are joined together. It comprises adjusting rollers 10d, 11d and 12d for applying a rotational force to 10c, 11c and 12c. Adjusting roller 10
d, 11d and 12d are driven by a motor (not shown).

The moving members 10b, 11b, 12b and the screw rollers 10c, 11c, 12c are threaded so as to mesh with each other.
When c and 12c rotate, the moving member moves in the groove direction. The base 11a of the y-direction adjusting member 11 has a protrusion at one end, and this is fixed to one end of the moving member 10b of the x-direction adjusting member 10. In the x-direction adjusting member 10, when the adjusting roller 10d rotates, a rotational force is applied to the screw roller 10c, and when the screw roller 10c rotates, the moving member 10b configured to mesh with the screw roller 10c moves in the x direction. When the moving member 10b moves, the y-direction adjusting member 11 adhered thereto also moves.

The base 12a of the z-direction adjusting member 12 is similarly fixed to the moving member 11b of the y-direction adjusting member 11, so that it is moved in the y-axis direction. Holding member 9
Has one end fixed to the moving member 12b of the z-direction adjusting member 12, so that it is moved in the z-direction. The moving mechanism by the y-direction adjustment member 11 and the z-direction adjustment member 12 is the same as that of the x-direction adjustment member 10, and the description is omitted.
With the configuration as described above, the holding member 9 is composed of three of x, y, and z.
It can move in any direction.

The holding member 9 has a bifurcated end that is different from the one end fixed to the moving member 12b, and holds the holding portion of the lamp across the held portion. Holding member 9
The forked portion has elasticity, and the portion in contact with the held portion is formed of a magnet. Therefore, since the held portion of the lamp formed of a magnetic material is held by the elastic force and the magnetic force, a sufficient force acts on the held portion to be held regardless of the diameter of the held portion. . The lamp held by the holding member 9 is movable in three directions x, y, and z.

A control unit (not shown) controls the mounted lamp to be located at an optimum position. First, the position control of the lamp in the x and y directions will be described. The control unit is
The position of the lamp in the x and y directions is adjusted so that the center axis of the lamp connecting the center point of the light emission and the center point of the held portion is controlled to be on the optical axis of the projector. FIG. 3 shows an xy sectional view including the holding member 9. The contact position between the held portion of the lamp and the holding member 9 varies depending on the diameter of the held portion of the lamp. FIG.
The diameter of the held portion of the lamp 1 of FIG. 3A is smaller than that of the lamp 1 ′ of FIG. 3B. As can be seen from FIG. 3, the larger the diameter of the held portion, the more the lamp is held at a portion closer to the forked portion side end of the holding member 9.

The control unit (not shown) acquires the size of the diameter of the held portion of the attached lamp as information on the illumination unit, calculates the amount of movement in the x and y directions according to the size of the diameter, and calculates the amount of movement in the x direction. Position adjustment is performed by the adjustment member 10 and the y-direction adjustment member 11 so that the lamp moves by the calculated amount. In FIG. 3, the optical axis of the projector is C0, and the central axis of the lamp is C1.
The amount of movement in the x and y directions is the amount of displacement of the center axis C1 of the lamp from the optical axis C0 of the projector. By moving the center by the amount of displacement, the center axis C1 of the held portion is on the optical axis C0. State. The shift amount in the x direction is x1 in FIG. 3A and x2 in FIG. 3B. still,
In a lamp having a general shape, there is no shift in the y direction between the optical axis C0 and the center axis C1 of the lamp.
It is assumed that there is no shift in the y direction in (a) and (b). Therefore, the present configuration may eliminate the y-axis adjustment mechanism and make the y-axis adjustment free.

Next, position control of the lamp in the z direction will be described. FIG. 4 shows a yz sectional view including the optical axis of the projector. Before the position control in the z direction, the position control in the x and y directions is performed. In FIG. 4, the position control in the x and y directions is completed, that is, the optical axis of the projector and the lamp are controlled. This shows a state in which the central axes match. In FIG. 4, the predetermined light emission center point optimal position is P1, the light emission center point of the lamp is P3, and the center point of the held portion is P4.

The control unit determines the information of the lighting unit from the center point P4 of the held portion of the attached lamp to the emission center point P
A length up to 3 (referred to as a lamp-specific length) is obtained, and a movement amount in the z direction according to the lamp-specific length is calculated. Then, the z-direction adjusting member 12 adjusts the lamp so as to move by the calculated amount. The movement amount in the z direction is a shift amount in the z direction from the light emission center point optimum position P1 of the lamp light emission center point P3. By moving by this shift amount, the lamp light emission center point P3 becomes the light emission center point optimum position. Be on P1.

For example, in FIG. 4A, it is assumed that the shift amount in the z direction between the light emission center point optimum position P1 and the light emission center point P3 of the lamp 1 is z1. The control unit includes a z-direction adjusting member 1
The lamp 1 is moved by 2 to make the light emission center point optimum position P1 coincide with the light emission center point P3 of the lamp as shown in FIG. 4B.

Further, even when a lamp 1 'different in type from the lamp 1 is mounted, the amount of movement of the lamp 1' in the z direction according to the lamp's inherent length is calculated, and the calculated amount of movement of the lamp 1 'is calculated. The lamp is moved so that the light emission center point optimum position P1 matches the light emission center point P3 of the lamp as shown in FIG.

The reflector 2 of this projector has a notch 2a centered on the apex thereof, and the notch 2a is a lamp having a held portion of any diameter. It is formed in a size to be inserted. Therefore, a lamp 1 ′ having a larger diameter of the held portion than the lamp 1 can be attached. Because of the configuration in which the lamp and the reflector are not directly connected, only the lamp can be replaced, and further, a different type of lamp can be mounted.

FIG. 6 is a yz sectional view including an optical axis of a lighting unit of a conventional projector as a reference example. Since the reflector 102 of the conventional projector did not have a cutout centered on the vertex, the lamp 101 was bonded to the vertex of the reflector 102. Therefore, only a lamp determined for each projector can be mounted, and the replacement of the lamp 101 has been performed integrally with the reflector 102.

<Second Embodiment> The projector of this embodiment does not have the z-direction adjusting means as the lamp position adjusting means, but instead has a regulating means for regulating the z-direction holding position in the lamp. , Is different from the first embodiment. The other configuration is the same as that of the first embodiment, and a duplicate description will be omitted.

FIG. 7 shows the regulating means of the projector.
A description will be given with reference to a schematic diagram of the illumination unit in FIG. Lamp 15
Ring-shaped stopper 14 fitted and fixed in
Are regulatory means. When attaching the lamp, the user always holds the holding member 9 on the end of the stopper 14 on the light emitting portion side.
Attach so that When mounted in this manner, the stopper 14 is fixed at a position corresponding to the lamp specific length where the light emission center point P3 of the lamp 15 coincides with the light emission center point optimum position P1 in the z direction.

FIG. 7B is a schematic view of an illumination section to which a lamp 15 ′ different from the lamp 15 is attached. The user attaches the stopper 14 ′ such that the holding member 9 contacts the end of the stopper 14 ′ on the light emitting unit side. When mounted in this manner, the light emission center point P3 of the lamp 15 coincides with the light emission center point optimum position P1 in the z direction.

FIGS. 8A and 8B show the results shown in FIGS.
FIG. 2B is a vertical sectional view including the optical axis of the illumination unit shown in FIG.
The length from the stopper to the light emission center point P3 of the light emitting portion of the lamp always has the same value a3 regardless of the type of lamp. When the position regulated by the stoppers 14 and 14 'is held by the holding member 9, the light emission center point P3 of the lamp coincides with the light emission center point optimum position P1.

In the illuminating section of the projector, the displacement of the light emission center point P3 and the light emission center point optimum position P1 does not occur in the z direction by following the restriction of the stopper as the restriction means as described above. Therefore, the z-direction adjusting member 12 unlike the first embodiment is not required. Although not shown, the holding member 9 is directly fixed to the y-direction adjusting member 11 in the present embodiment.

The illuminating portions of the projectors of the first and second embodiments have a structure in which the holding portion of the lamp is sandwiched by a V-shaped bifurcated portion from one side by a holding member 9 having one end fixed. In such a configuration, as described above, the position of the lamp in the x direction varies depending on the diameter of the held portion of the lamp. Instead of this holding member 9, FIG.
A holding member 9 ′ configured to sandwich the held portion of the lamp with a uniform force from the left and right directions as shown in FIG.

The holding member 9 ′ includes a right member 9 ′ a and a left member 9 ′ b having a V-shaped recess formed by a magnet.
The right member 9'a and the left member 9'b are geared by a gear 9'c. Therefore, the right member 9'a and the left member 9'b move in opposite directions. FIG.
(B) shows a state in which the holding member 9 'holds the lamp 15 of the second embodiment. The held portion 15b of the lamp is located between the recessed portions of the right member 9'a and the left member 9'b.
Is inserted, the right member 9'a and the left member 9'b are
Is attracted. Then, the held portion 1b is sandwiched and the lamp is held.

The movement of each member 9'a, 9'b is regulated by a guide (not shown). The gear 9'c is fixed, and the position of the holding member 9 'as a whole in the x direction does not change. Although not shown, since the magnetic force acting between the lamp and the members 9'a and 9'b is strong, a lever for resetting when the lamp is removed is provided. FIG. 36 is an xy sectional view before (a) and after (b) the movement of the holding members 9′a and 9′b. According to the configuration of the holding member 9 ', it is possible to prevent the lamp position from shifting in both the x and y directions. Therefore, a configuration excluding the x and y direction adjustment mechanisms is possible.

<Third Embodiment> A lighting unit of a projector according to the present embodiment has a lamp unit in which a lamp and a reflecting umbrella are formed in a box-shaped member. The unit can be replaced. FIG. 9A shows the box-shaped member 21 and its contents in a cross-sectional view including the central axis of the lamp. Lamp unit 27
Comprises a box-shaped member 21, a reflector 22 and a lamp 80.
FIG. 9B shows a box-shaped member 21 ′, a reflector 22 ′, and a lamp 8.
A sectional view of a lamp unit 27 'formed by 0' is shown. The lamp unit 27 ′ includes a lamp of a significantly different type than the lamp unit 27.

In the lamp unit, the lamp is fixed at a position where the light emission center point has the most optimal positional relationship with the reflector inside the reflector. Box-shaped members 21, 21 '
The stoppers 23 and 23 'fixed to the outer peripheral portion of the
In the projector, it is a restricting means for restricting the holding position of the lamp units 27 and 27 'by the holding member so that the light emission center point P3 of the lamp coincides with the optimum light emission center point position in the z direction.

When attaching the lamp unit, the user always attaches the holding member to the end of the stopper on the light emitting unit side. When mounted in this manner, the stopper is fixed at a position where the light emission center point P3 of the lamp coincides with the optimum light emission center point position of the projector in the z direction. Therefore, z from the light emission center point P3 to the stopper
The length in the direction is the same value a even if the type of lamp unit is different
It is 4. With the configuration as described above, no z-direction adjusting member is required as in the third embodiment.

FIG. 10 is a schematic diagram of the entire lighting section to which the lamp unit 27 is attached. The lamp unit 27 is fixed by a fixing member 25. The fixing member 25 has x
Direction adjustment member 10, y-direction adjustment member 11, holding member 26
Consists of Since the configurations of the x-direction adjustment member 10 and the y-direction adjustment member 11 are the same as those of the first embodiment shown in FIG. 2, the same reference numerals are given to the respective members, and description thereof will be omitted.

The holding member 26 has a holding portion formed of an L-shaped magnet. The box 21 of the lamp unit 27 is made of a magnetic material, and the lamp unit 27 is held by a magnetic force acting between the lamp unit 27 and the holding member 26. The holding member 26 is fixed to the y-direction adjusting member 11, and is movable in the x and y directions. Therefore, the lamp unit 27 held by the holding member 26 can also move in the x and y directions.

The position control in the x and y directions is performed by moving the lamp unit 27 by the x direction adjusting member 10 and the y direction adjusting member 11 based on the data of the illumination unit so that the center axis of the lamp coincides with the optical axis of the projector. Let me do it. The other configuration is the same as that of the first embodiment, and a duplicate description will be omitted.

<Fourth Embodiment> FIG. 37 is a diagram showing the overall configuration of a lighting unit according to this embodiment. The lighting unit of the present embodiment includes:
The lamp unit of the lighting unit according to the third embodiment has a configuration in which a stopper is removed from the lamp unit and a z-direction adjusting member 12 is added instead. The configuration of the z-direction adjusting member 12 is the same as that of the z-direction adjusting member 12 of the first embodiment shown in FIG. 2, and the other portions are the same as those of the third embodiment. A duplicate description will be omitted. With this configuration, the lamp unit can be moved to the optimum position.

<Common Items in First to Fourth Embodiments> In the first to fourth embodiments, the control unit automatically takes in the information of the illumination unit input by the user.
Then, based on the acquired information on the lighting unit, for example, the position control of the lamp and the lamp unit and the driving voltage of the lamp are determined. Hereinafter, the input of the illumination information and the control mechanism based on the input will be described.

The projector has a data input section 36 shown in FIG. 11 on the side of the outer case of the projector. The outer box of the projector is such as to house the entire projector shown in FIG. The data input unit 36 is a numeric keypad 3
7, an up / down key 38, a set button 39, a rated output setting button 40, an initial light emission amount setting button 41, a lifetime light emission amount setting button 42, an initial deviation amount setting button 46, and a display unit 43.

When the buttons 40, 41, 42 and 46 are pressed,
A rated output setting mode for setting the rated output, an initial light emission setting mode for setting the initial light emission, a lifetime light emission setting mode for setting the lifetime light emission, x, y, and z at the initial position of the holding unit. The shift amount setting mode for setting the shift amount in the direction is set.

In this embodiment, the data used for position control of the lamp and the lamp unit is set as a shift amount at the initial position of the holding unit, and the shift amount setting mode is employed. May be used as data used for position control, and a mode for setting these may be adopted. In this case, the control unit calculates the movement amount from these data.

When entering each mode and inputting each data using the ten keys 37 or the up / down keys 38, the input data is displayed on the display unit 43. Thereafter, when the set button 39 is pressed, the displayed data is set in the memory. The control unit reads necessary data from the memory.

The control section of the projector according to the first to fourth embodiments has voltage switching means for switching the voltage applied to the light emitting section of the lamp of the illumination section. Hereinafter, the voltage switching means will be described. FIG. 12 shows a circuit block diagram of a portion related to the voltage switching means. Control unit 50
Acquires the data of the light emission amount at the initial time and the life time from the memory 51 in the data holding unit 30 or the memory 51 in the box.

When the user gives an instruction to turn on the power, the control unit 50 controls the first power supply 53 to apply a voltage to the lamp 55 based on the rated output obtained as information on the lighting unit. , The lamp 55 is turned on. The lamp 55 is a lamp attached to the lighting unit.
The light emission amount monitor 52 detects the light emission amount during the lighting of the lamp 55 at predetermined intervals, and sends detection data to the control unit 50.

When the light emission amount of the lamp transmitted from the light emission amount monitor 52 reaches a predetermined value, the control unit 50
Control for increasing the value of the voltage applied to the lamp 55 is performed. Specifically, the drive power supply circuit is switched such that a voltage is applied to the lamp 55 by the second power supply 54 that supplies a larger power than the first power supply 53.

FIG. 13 shows how the amount of light emission varies with the power-on time under the above control. The horizontal axis represents time, and the vertical axis represents the amount of light detected by the light emission monitor 52. The initial light amount is L1, the light amount at the end of the life is L2, and the predetermined value is L4. It is assumed that L3 is a value equal to (L1 + L2) / 2. After the power is turned on, the light emission amount gradually decreases, starting from the initial light emission amount L1. The value of this light emission amount is
At time t1 when the predetermined value L4 becomes smaller than L3, the control unit 50 switches the power supply for supplying power to the lamp 55 from the first power supply 53 to the second power supply 54.

When switching to the second power supply 54, the applied voltage increases, so that the amount of light emission increases. Due to the characteristics of the lamp,
As the driving voltage increases, the amount of decrease in the amount of light emission with respect to time increases. Therefore, the slope of the graph of the light emission amount is the first.
Becomes larger than when the power supply 53 is turned on. However, as a result, when driving at a constant voltage without increasing the driving voltage,
In contrast to the case where the lifetime light emission amount is reached at t2, when the control as in the present embodiment is performed, the lifetime light emission amount is reached at t3 longer than t2, and the use time of the lamp becomes longer by t3−t2. .

The timing of switching the power supply circuit may be set earlier. However, if the light emission amount is switched at a time point greater than the intermediate value L3, the time required to reach the lifetime light emission amount becomes earlier, and the power supply circuit is switched. It is possible that the time t2 before the end of the life when switching is not performed may be earlier. In this case, the advantage obtained by switching the power supply circuit is reduced. Therefore, as in the present embodiment, it is desirable to set the predetermined value L4 to a value equal to or less than the intermediate value L3.

In the above-described embodiment, the control is performed by using the light emission amount at the end of the life together with the initial light emission amount. However, in a general lamp, the light emission at the end of the life is reduced by the initial light emission amount. It is half the value. Therefore, control may be performed using only the initial light emission amount. in this case,
L2 = 1/2 × L1, and L3 = (L1 + L2) / 2
= (1/2 × L1 + L1) / 2 = 3/4 × L1.

<Fifth Embodiment> The projector of this embodiment is different from the projector of the third or fourth embodiment in that
Further, the temperature control means is added. FIG.
FIG. 1 shows a schematic configuration diagram of the projector of the present embodiment. FIG. 38 shows a vertical sectional view of the lamp unit.

The components of the temperature control means will be described with reference to FIGS. The temperature control means includes a fan 6
0, an atmospheric temperature detecting device 62, a signal transmission line 61, a heater 67 and a Peltier element 66 for adjusting a lamp temperature according to a signal transmitted from the signal transmitting line 61, a lamp temperature detecting sensor 64 for detecting a lamp temperature, an atmospheric temperature detecting The control unit 50 controls the fan 60, the heater 67, and the Peltier element 66 based on data detected by the device 62 and the lamp temperature detection sensor 64.

The atmospheric temperature detector 62 is provided on the base 8 and detects the temperature of the atmosphere. The fan 60 is configured on the base 8 near the lamp unit 27 and cools the atmosphere near the lamp unit 27. The heater 67, the Peltier element 66, and the temperature detection sensor 64 are disposed so as to be in contact with the lamp 1.

FIG. 15 shows a block diagram of a portion related to the temperature control means of the present embodiment. The control unit 50 controls the power supply circuit 65 based on the operation of the power switch by the user. The power supply circuit 65 is the first power supply 5 in FIG.
3 and a second power supply 54. Also, the control unit 50
The Peltier device 66 and the heater 67 as the first cooling means included in the lamp unit 27 are controlled based on the detection result of the lamp temperature sent from the lamp temperature detection sensor 64. This data transmission and control are performed via the signal transmission line 61. Further, the control unit 5
0 indicates a fan 60 as a second cooling means based on the detection result of the atmospheric temperature sent from the atmospheric temperature detecting device 62.
Control.

The temperature control by the fan 60 will be described. Even if there is no change in the applied voltage, the brightness of the lamp varies depending on the temperature of the lamp at the time of light emission. FIG. 16 shows the relationship between lamp temperature and brightness when the applied voltage is constant. The horizontal axis represents temperature, and the vertical axis represents brightness. As shown in FIG. 16, in the lamp, the optimal temperature T at which the brightest light emission is obtained.
The brightness decreases as the temperature of the lamp moves away from the optimum temperature T1. Therefore, in order to obtain bright illumination efficiently, it is desirable to make the lamp emit light at the optimum temperature T1.

When the lamp 55 continues to emit light, it continuously emits heat, so that the temperature rises. In the present embodiment, in order to keep the temperature of the lamp 55 at the optimum temperature T1, the lamp 55
During the light emission, the fan 60 is operated to cool the air around the lamp, thereby indirectly lowering the rising lamp temperature.

Note that the cooling level of the fan 60 required to maintain the temperature near the optimum temperature T1 differs depending on the atmospheric temperature. The cooling level may be lower if the ambient temperature is lower. The higher the ambient temperature, the higher the cooling level must be. Therefore, in the present embodiment, the cooling level is determined based on the detection result of the atmospheric temperature by the atmospheric temperature detecting device 62, and the drive of the fan 60 is controlled according to the cooling level. Specifically, the rotation speed of the fan 60 is adjusted according to the cooling level.

Next, temperature control by the Peltier element 66 and the heater 67 will be described. The user can operate
It can instruct ON / OFF of the main power supply and ON / OFF of the sub power supply. When an instruction to turn on the sub power supply is given when the main power supply is turned on, a voltage is applied, and an image is projected (the lamp 55 is turned on) when the temperature of the lamp 55 reaches the light emission temperature. When the sub-power supply is turned off when the lamp 55 is turned on, the temperature of the lamp 55 drops from the light emission temperature and is turned off.

When a certain time has elapsed since the image was turned off, the lamp 5
When the temperature of the lamp 5 is cooled to a predetermined relightable temperature or lower, a voltage can be applied to the lamp 55. Although the lamp 55 is manufactured so as to emit light at a predetermined emission temperature, the lamp 55 is not turned on even if a voltage is applied to reach the emission temperature at a point having a temperature higher than the relightable temperature.

If the sub power supply is turned on when the lamp temperature is higher than the relightable temperature, the lamp 55 cannot be relighted even if a voltage is applied, so that the lamp 55 is cooled below the relightable temperature. After waiting until the instruction is issued, control for executing the instruction to turn on the sub power supply is performed. In the present embodiment, the control for shortening the predetermined time required for the temperature of the lamp 55 to be cooled to the re-lighting temperature or lower after the image is turned off is performed using the Peltier element 66 of the temperature control unit.

Based on this control, the lamp 5 with respect to time
FIG. 17 shows an example of the temperature change of No. 5. The horizontal axis represents time, and the vertical axis represents temperature. The state of the temperature change based on the control of the present embodiment is shown by a solid line 70, and the state of the temperature change based on the conventional control is shown as a dashed line 71 and a dotted line 71 'as a reference example.
Indicated by When the image is on, the lamp 55 maintains the light emission temperature T10. When the sub-power supply is turned off at time t11, in the present embodiment, the lamp is rapidly cooled using the Peltier element 66. By this rapid cooling, the lamp 55 is cooled to the relightable temperature T11 at the time t13. That is, the time required for cooling to the relightable temperature T11 is t1
2-t11.

Further, in this embodiment, the heater 6
7, the control for maintaining the relightable temperature T11 is performed. Then, when the sub-power supply is turned on at time t15, the lamp 55 is heated using the heater 67, and the lamp 55 is controlled to reach the emission temperature T10 in a short time. At time t16, the temperature of the lamp 55 reaches the light emission temperature T10, and an image is projected on the eyes of the observer.

According to the conventional control, even if the sub-power supply is turned off at time t10, rapid cooling control is not performed, so that the time required to reach the relightable temperature T11 is long, and time t1
7 had been reached. Therefore, time t1 earlier than time t17
Even if the sub power supply is turned on in 3, it is ignored as indicated by a dotted line 71 ′, or waits until the time t 17 when the relightable temperature T11 is reached as indicated by the dashed line 71, and then, based on the instruction to turn on the sub power supply. The lighting control of the lamp was performed.

In the lighting control of the lamp, since there is no means for forcibly heating the lamp, it takes a long time to reach the light-emitting temperature T10 from the relightable temperature T11. When the temperature reached T10, an image was to be projected on the eyes of the observer.
Thus, even if the sub power is turned on at the same time t15,
The time required for an image to be actually projected on the observer's eye was much longer in the conventional case.

The temperature of the lamp 55 reaches the relightable temperature T11.
The solid line 72 in FIG. 18 shows how the temperature of the lamp 55 changes under the control of the present embodiment when an instruction to turn on the sub power supply is given before the lamp 55 is cooled down. At time t11, there is an instruction to turn off the sub power supply, and rapid cooling is started. When the sub-power supply is turned on at time t12 immediately after the start of rapid cooling, the apparatus waits until the temperature reaches the relightable temperature T11, and performs control based on the instruction to turn on the sub-power at time t13 when the temperature reaches the relightable temperature T11. .

Specifically, a voltage is applied to the lamp 55 and the lamp 55 is heated using the heater 67.
By this control, an image is projected on the eyes of the observer at time t4. In this case, a waiting time from when the sub-power supply is turned on to when the sub-power supply is turned on is required, but a very short time is required as compared with the related art.

Next, a description will be given of temperature control by the Peltier element 66 and the heater 67 which is different from the above-described rapid cooling.
When the main power is turned on, if the lamp 55 is lower than the relightable temperature T11, the lamp 67 is preheated by the heater 67, and control is performed to maintain the temperature of the lamp 55 at the relightable temperature T11. By performing this control, the time required for the lamp 55 to reach the light emission temperature T10 after the auxiliary power supply is turned on is reduced.

The lamp 5 with respect to time based on this control
An example of the temperature change of No. 5 is shown by a solid line 73 in FIG.
In FIG. 19, a dashed-dotted line 74 shows how the temperature of the lamp changes based on the conventional control as a reference example. The horizontal axis indicates time, and the vertical axis indicates temperature. The main power is turned on at time t20. In the present embodiment, the lamp 67 is preheated by using the heater 67 in accordance with the turning on. The temperature of the lamp 55 is controlled so as to maintain the relightable temperature T11.

At time t21, the sub power supply is turned on. In the present embodiment, a voltage is applied to the lamp 55 in accordance with the turning on, and the lamp 55 is heated again by the heater 67, and control is performed to shorten the time required to reach the light emission temperature T10. With this control, an image can be observed at time t23.

Conventionally, control has been performed to apply a voltage to the lamp when the sub-power supply is turned on at time t21. The temperature of the lamp rises due to the applied voltage, reaches the light emission temperature T10 at time t24, and an image is projected on the eyes of the observer. However, it took a very long time to raise the temperature of the lamp to the light emission temperature T11 only by the applied voltage from the state where the lamp was not preheated. Even if the sub-power supply is turned on at the same time t21, there is a large difference in the time required until an image is actually projected between the present embodiment and the conventional example, and the present embodiment is shorter.

FIG. 20 shows a control flow relating to the temperature control of the present embodiment. When the main power supply is turned on in step # 5, preheating by the heater 67 is started in step # 10. The preheating is performed at a temperature T1 at which the temperature T of the lamp 55 can be turned on again.
Continue until it reaches 1. In step # 15, it is determined whether the sub power supply is on. If the secondary power is off,
In step # 20, it is determined whether the main power is off. If the main power supply is off, the preheating is turned off in step # 25, and the control ends. If the main power is not off, the process returns to step # 15.

If the sub power supply is turned on in step # 15,
In step # 30, the lamp 55 is directly heated by the heater 67. Then, in step # 35, the temperature T of the lamp 55
Is higher than or equal to the light emission temperature T10. T10
At this point, the process proceeds to step # 40 where the heater 67
The direct heating of the lamp 55 by the
At 45, the fan 60 is driven to start air cooling. When the sub power supply is turned off at step # 50, the direct cooling of the lamp 55 by the Peltier element 66 is started at step # 55. Then, in step # 60, the temperature T of the lamp 55 becomes T
It waits until it becomes 11 or less. When the temperature T of the lamp becomes equal to or lower than the relightable temperature T11, the process proceeds to step # 65, where the cooling is directly stopped, and the fan 6 is stopped at step # 70.
0 is stopped, and the process returns to step # 15.

<Sixth Embodiment> The projector of the present embodiment has a configuration in which the projector of the first embodiment is provided with a luminance adjusting means. The brightness adjusting means is means for adjusting the brightness of illumination light for illuminating the liquid crystal panel during use. When the illumination area of the illumination light at the liquid crystal panel position coincides with the area of the liquid crystal panel, the light utilization efficiency is highest and the brightest uniform illumination can be achieved.

When the illumination area of the illumination light is wider than the area of the liquid crystal panel, some light is discarded without entering the liquid crystal panel, and the light becomes darker than when all the light enters the liquid crystal panel. The illumination becomes darker as the illumination area of the illumination light becomes wider than the area of the liquid crystal panel. Specifically, the brightness adjusting means of the present embodiment controls the position of the lamp, thereby adjusting the illumination area of the light at the liquid crystal panel position, and adjusting the brightness of the illumination. The brightness adjusting means first detects the brightness of the illumination on the liquid crystal panel, and adjusts the brightness of the illumination based on the detection result.

In this projector, immediately after the lamp is mounted, control is performed so that the lamp is located at the lamp position calculated at the time of design that the light emitted from the lamp can be used most effectively. However, each lamp has characteristics, and the state where the lamp is located at the optimum position calculated at the time of design for all lamps is not necessarily the state where the light use efficiency is the highest. Further, the position of the lamp may be shifted. According to the brightness adjusting means of the present embodiment, the brightness of the illumination on the liquid crystal panel can be detected, and the lamp position can be controlled based on the detection result so as to achieve the brightest illumination state.

Further, according to the brightness adjusting means, the brightness of the illumination can be detected, and if the brightness is higher than a predetermined brightness, control can be performed to lower the brightness of the illumination. This control is effective, for example, when the amount of light emitted from the attached lamp is large and the illumination light is too bright.

FIG. 21 is a simplified cross-sectional view showing how a liquid crystal panel is illuminated by light emitted from a lamp in this projector. FIG. 21A shows a state where the light illumination area matches the illumination area of the liquid crystal panel 5G, that is, the brightest illumination state. FIG. 21B shows a state where the light illumination area is the area of the liquid crystal panel 5G. The illumination state is wider and darker than the state of FIG. Note that this projector is 3
Although three liquid crystal panels are provided, the light illuminating regions at the liquid crystal panel positions are configured to be equal in the three liquid crystal panels. Therefore, FIG. 21 shows only the liquid crystal panel 5G.

For the same reason, the brightness of the illumination light on the liquid crystal panel is also provided with a detecting means (not shown) for detecting only the brightness on the liquid crystal panel 5G. The detection means is, for example, a sensor provided near the periphery of the liquid crystal panel 5G for detecting the amount of light. The z-direction adjusting member 82 is configured to move the lamp 81 in the z-direction. For example, the z-direction adjusting member 1 shown in FIG.
The configuration is the same as that of 2.

When the control is performed so that the brightness of the illumination is always the highest, the position of the lamp 81 in the z-direction is moved by the z-direction adjusting member 82 so as to adjust to the position where the detection result of the sensor becomes the brightest. . For example, FIG.
In this state, the lamp 81 is moved forward in the optical axis direction, and the position of the lamp 81 is adjusted to the state shown in FIG.

An upper limit value of the brightness of the illumination is provided, and when the control for adjusting the brightness is performed so as not to become brighter than the upper limit value, when the upper limit value is exceeded based on the detection result of the sensor, the lamp 81 is turned off. The position in the z direction is moved to adjust the amount of light to be discarded so that the upper limit is not exceeded. For example, when the brightness is above the upper limit in the state of FIG. 21A, the lamp 81 is moved backward in the optical axis direction,
The position of the lamp 81 is adjusted so that the brightness of the illumination light becomes appropriate.

The above control is effective when the lamps having different light emission amounts are replaced. FIG. 22 shows a cross-sectional view of a projector to which different types of lamps are attached.
For example, when the lamp 81 is attached, it is assumed that the state of FIG.
However, it is assumed that when the lamp 81 'is replaced with the lamp 81', the light emission amount of the lamp 81 'is larger and exceeds the upper limit of the brightness in the brightest illumination state. In this case, as shown in FIG. 22B, the position of the lamp 81 'is moved backward in the optical axis direction, and the illumination state is adjusted based on the detection result of the sensor.

The type of control to be performed based on the detection result of the sensor may be a configuration that can be set by a user, or may be a configuration that is preset at the time of manufacture.

<Seventh Embodiment> In the projector of this embodiment, the position of the reflector 83 in the z-direction is replaced with the z-direction adjusting member 82 for adjusting the lamp position of the sixth embodiment as the brightness adjusting means. Umbrella position adjustment member for adjusting the FIGS. 23 and 24 show views corresponding to FIGS. 21 and 22 of the sixth embodiment. The reflecting umbrella adjusting member 84 includes a driving shaft 84a inserted so as to be in contact with a hole provided in the reflecting umbrella 83 and a motor 8 for applying a rotational force to the driving shaft 84a.
4b. The hole in the reflector 83 and the drive shaft 84a are threaded so as to mesh with each other.
The reflection umbrella 83 is configured to move in the optical axis direction by the rotation of a.

FIG. 23 shows the difference in the illumination state depending on the position of the reflector 83. FIG. 23A shows the brightest illumination state.
FIG. 23 (b) shows a state in which the light that is discarded is generated and the illumination becomes darker than the state of FIG. 23 (a).

FIG. 24 shows an illumination state by controlling the position of the reflector 83 according to the type of lamp. The state of illumination by the lamp 82 is shown in FIG. 24A, and the state of illumination by the lamp 82 'is shown in FIG. Regarding the control for adjusting the brightness based on the detection result of the sensor, the members used as the means are different from those of the sixth embodiment, and the other methods are the same as those of the sixth embodiment. I do.

In the above-described sixth and seventh embodiments,
Although a member for adjusting the position of the lamp or the reflector is provided as the luminance adjusting means, the luminance adjusting means can be constituted by other members. Hereinafter, a configuration of a projector provided with a brightness adjusting unit different from the sixth and seventh embodiments will be described.

<Eighth Embodiment> FIG. 25A shows a configuration diagram of a projector according to this embodiment. The projector according to the present embodiment has a configuration in which luminance adjusting means is added to the conventional projector shown in FIG. The same components as those of the conventional projector are denoted by the same reference numerals, and redundant description will be omitted.

The brightness adjusting means includes the first lens array 10.
First lens array moving member 9 for moving lens 3 in the optical axis direction
Consists of zero. The moving member 90 includes the first lens array 10.
The drive shaft 90a is inserted into contact with the third hole and a motor 90b that applies a rotational force to the drive shaft 90a. The holes of the first lens array 103 and the drive shaft 90a are threaded so as to mesh with each other.
The first lens array 103 is configured to move in the optical axis direction by the rotation of. By the moving member 90, the first lens array 103 can be moved in the optical axis direction, for example, from the state A indicated by a solid line to the state B indicated by a dotted line.

FIG. 25 (b) shows the first lens array 1
The difference of the lighting state according to the position of 03 is shown. LCD panel 1
When the first lens array 103 is in the state A with respect to 11R, 111G, and 111B, the area of the illumination light is as shown in the area 92a.
2b. That is, in the state A, the area of the illumination light is narrower, and brighter illumination can be obtained.

The brightness control method by the brightness adjusting means is as follows.
The description is omitted because it is similar to the sixth and seventh embodiments.

<Ninth Embodiment> FIG. 26A shows a configuration diagram of a projector according to this embodiment. The projector according to the present embodiment includes, as a brightness control unit, a second lens array moving member that moves the second lens array 104 in the optical axis direction instead of the first lens array moving member 90 according to the eighth embodiment. 91 are provided. The moving member 91 includes a drive shaft 91 a inserted into a hole of the second lens array 104.
And a motor 91b, and have the same configuration as the moving member 90. The second lens array 104 is moved by the moving member 91.
Can be moved in the optical axis direction, for example, from state A shown by a solid line to state B shown by a dotted line.

FIG. 26B shows the second lens array 1.
The difference of the lighting state according to the position of 04 is shown. LCD panel 1
When the second lens array 104 is in the state A with respect to 11R, 111G, and 111B, the area of the illumination light is as shown in the area 93a.
3b. That is, in the state A, the area of the illumination light is narrower, and brighter illumination light can be obtained.

The brightness adjusting means of the eighth and ninth embodiments described above is also effective for projectors having different illumination units. For example, the lamp may be replaceable like the lighting units of the first to fourth embodiments. A projector that differs from the projector of the ninth embodiment only in the configuration of the illumination unit will be described below as a tenth embodiment.

<Tenth Embodiment> FIG. 27A shows a configuration diagram of a projector according to this embodiment. The illumination unit of the projector according to the present embodiment includes a reflector 115 formed of a parabolic reflecting mirror and a lamp 116 different from the lamp 101. The moving member 91 can move the second lens array 104 in the optical axis direction, for example, from the state A indicated by a solid line to the state B indicated by a dotted line.

FIG. 27B shows the second lens array 10.
The difference of the lighting state according to the position of No. 4 is shown. LCD panel 11
When the second lens array 104 is in the state A with respect to 1R, 111G, and 111B, the area of the illumination light is the area 9
4a, and in the state B, the area 94
b. That is, in the state A, the area of the illumination light is narrower, and brighter illumination light can be obtained.

<Eleventh Embodiment> FIG. 28A shows a configuration diagram of a projector according to the present embodiment. In the projector of the present embodiment, light emitted from an illumination unit having a reflector 117 formed of a lamp 117 and a spheroidal reflecting mirror is converted into parallel light by a kaleidoscope 119, After being incident on the liquid crystal panel 123 via the lens 122 and converted into an optical image, the image is projected on a projection screen (not shown) by the projection lens 124. Callide scope 1
19 is held by a holding member 120.

The brightness adjusting means of the projector comprises a moving member 125 for indirectly moving the kaleidoscope 119 in the optical axis direction by moving the holding member 120 of the kaleidoscope 119 in the optical axis direction. The moving member 125 is provided with the drive shaft 12 inserted into the hole of the holding member 120.
5A, a motor 125b, and a motor 91b, and have the same configuration as the moving member 90 of the eighth embodiment. By the moving member 125, the holding member 120 and the kaleidoscope 119 can be moved in the optical axis direction, for example, from the state A indicated by a solid line to the state B indicated by a dotted line.

FIG. 28B shows the calliscope 11.
9 shows the difference in the lighting state depending on the position of No. 9; LCD panel 12
In contrast to 3, when the kaleidoscope 119 is in the state A, the area of the illumination light is as shown in the area 126a,
When in state B, it is as shown in area 126b.
That is, in the state A, the area of the illumination light is narrower, and brighter illumination light can be obtained. The method of controlling the brightness by the brightness adjusting means is the same as in the sixth and seventh embodiments, and a description thereof will be omitted.

<Twelfth Embodiment> FIG. 29A shows a configuration diagram of a projector according to this embodiment. In the projector according to the present embodiment, as a brightness control unit, a movement that moves the holding member 127 of the relay lens 121 in the optical axis direction instead of the moving member 125 that moves the holding member 120 of the kaleidoscope of the eleventh embodiment. A member 128 is provided. The moving member 128 includes a drive shaft 128a and a motor 128b inserted into the hole of the holding member 127, and has the same configuration as the moving member 90 of the eighth embodiment. The holding member 127 and the relay lens 121 are moved by the moving member 128.
Can be moved in the optical axis direction, for example, from state A shown by a solid line to state B shown by a dotted line.

FIG. 29B shows a difference in the illumination state depending on the position of the relay lens 121. When the relay lens 121 is in the state A with respect to the liquid crystal panel 123, the region of the illumination light is as shown in a region 129a, and when in the state B, it is as shown in the region 129b. That is,
In the state A, the area of the illumination light is narrower, and brighter illumination light is obtained. The method of controlling the brightness by the brightness adjusting means is the same as in the sixth and seventh embodiments, and a description thereof will be omitted.

The brightness adjusting means of the projectors of the above-described sixth to twelfth embodiments are not configured to separately control the illumination of the three liquid crystal panels. When the light of the light source is separated into light of the R, G, and B wavelength ranges, and the liquid crystal panel is illuminated with the light of the respective wavelength ranges, the brightness of the light of the respective wavelength ranges differs according to the general light source. . The brightness of light in the wavelength range of R is highest.
Hereinafter, a projector provided with a brightness adjusting unit having a function of correcting a difference in brightness depending on the wavelength range as described above will be described as a first projector.
Third, a description will be given as a fourteenth embodiment.

<Thirteenth Embodiment> FIG. 30 shows a configuration diagram of a projector of this embodiment. The eighth shown in FIG.
The same components as those of the projector according to the embodiment are denoted by the same reference numerals, and redundant description will be omitted. The difference from the projector of the eighth embodiment is that the light source light is emitted from the first lens array 103 and is then split by the light splitting means into light in the three wavelength ranges of R, G and B colors. In addition, a second lens array and a condenser lens corresponding to each of the divided lights are provided. Further, the configuration of the brightness adjusting means is different.

The light splitting means includes a dichroic mirror 132 that reflects only light in the B wavelength range that is arranged orthogonally.
And a dichroic mirror 133 that reflects only light in the R wavelength range. The brightness adjustment means includes apertures 130R, 130G, and 130B provided corresponding to the light of each color, and motors 131R and 13 for respectively adjusting the aperture amounts.
1G and 131B. Apertures 130R, 130G, 1
Reference numeral 30B is arranged between the second lens arrays 104R, 104G, 104B provided for the respective colors of light and the synthetic lenses 105R, 105G, 105B.

Dichroic mirror 133 of light splitting means
The light in the wavelength range of R reflected and divided by the second lens array 104R, the diaphragm 130R, and the combining lens 105R are transmitted through the second lens array 104R, reflected by the reflection mirror 134a, and then transmitted through the field lens 110R to the liquid crystal panel 111R. Light up. The light in the G wavelength range that has been transmitted and split by the two mirrors 132 and 133 of the light splitting means is transmitted to the second lens array 10.
4G, a diaphragm 130G, and a synthetic lens 105G.
The liquid crystal panel 111G is illuminated via 10G.

Dichroic mirror 132 of light splitting means
The light in the B wavelength range reflected and divided by the second lens array 104B, the diaphragm 130B, and the combining lens 105B pass through the reflection mirror 134b and the condenser lens 10B.
8. Illuminate the liquid crystal panel 111B via the reflection mirror 134c, the relay lens 109, the reflection mirror 134d, and the field lens 110B. Each liquid crystal panel 111R, 1
The image lights of the optical images of the respective colors formed by 11G and 111B are combined by a cross dichroic prism 112 and then projected on a projection screen by a projection lens 113.

FIG. 31 shows diaphragms 130R, 130G, 13
0B and a motor 13 for adjusting these aperture amounts, respectively.
1 shows the detailed configuration of 1R, 131G, and 131B. Aperture 1
Part 130a of peripheral part of 30R, 130G, 130B
Is serrated. Motors 131R, 131G, 1
31B has a rotating portion 131a that meshes with the saw-toothed portion 130a. By rotating the rotating portion 131a, a rotational force is applied to the peripheral edges of the apertures 130R, 130G, and 130B.

In the diaphragms 130R, 130G, and 130B, the area of the opening 130b changes depending on the amount of rotation. The smaller the area of the opening 130b is, the smaller the light transmission amount is. Motors 131R, 131G, 131
B are controlled separately, so that the transmission amounts of the lights of the respective colors can be controlled separately.
G and 111B can separately adjust the brightness of the illumination.

With the configuration described above, according to the brightness adjusting means of this embodiment, in addition to performing the same brightness adjustment as in the eighth to twelfth embodiments, the brightness of each color light is also increased. Can be corrected.

<Fourteenth Embodiment> FIG. 32 shows a configuration diagram of a projector according to this embodiment. The eighth shown in FIG.
The same components as those of the projector according to the embodiment are denoted by the same reference numerals, and redundant description will be omitted. The light splitting means is
It comprises a dichroic mirror 135 that reflects only light in the orthogonal R wavelength range and a dichroic mirror 136 that reflects only light in the B wavelength range.

The dichroic mirror 135 of the light splitting means
The light in the wavelength range of R reflected by the condenser lens 1
08R, reflection mirror 136c, relay lens 109R,
The liquid crystal panel 111R is illuminated via the reflection mirror 136d and the field lens 110R. The light in the G wavelength range transmitted by the two mirrors 135 of the light splitting unit illuminates the liquid crystal panel 111G via the field lens 110G. The light in the B wavelength range reflected by the dichroic mirror 136 of the light splitting means is condensed by the condenser lens 108B,
The liquid crystal panel 111B is illuminated via the reflection mirror 136a, the relay lens 109B, the reflection mirror 136b, and the field lens 110B.

The brightness adjusting means of this embodiment comprises a moving member 135 for moving the relay lens 109R in the direction of the optical axis. The moving member 135 includes a driving shaft 135a and a motor 135b inserted into a hole of the holding member 109a for holding the relay lens 109R, and includes a moving member 9 of the eighth embodiment.
0. By the moving member 135,
The relay lens 109R can be moved in the optical axis direction, and the brightness of illumination light incident on the liquid crystal panel 111R can be adjusted.

According to the brightness adjusting means of the present embodiment, the illumination state by the light in the R wavelength region having the largest brightness difference from the light in other wavelength regions can be adjusted. Can be reduced. Further, for example, it is also possible to combine the luminance adjustment means of the eighth and ninth embodiments, and by combining these, it is possible to adjust the luminance of the optical image.

[0132]

According to the projector described in the first aspect, it is possible to mount a lamp having any rating. Further, since information on the lighting unit corresponding to the attached lamp can be input and control is performed based on the information, the lamp emits light at a drive voltage corresponding to the attached lamp, for example.

Therefore, a lamp having necessary characteristics can be mounted, and the lamp emits light by control according to the lamp. Therefore, it is possible to maximize the characteristics of the attached lamp. Further, unnecessary energy consumption can be prevented by performing control that is not suitable for the lamp.

Of course, the latest lamp can be installed. With the latest lamps, it is possible to obtain brighter projected images with higher efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a projector according to a first embodiment.

FIG. 2 is a detailed configuration diagram of a lighting unit of the projector according to the first embodiment.

FIG. 3 is an xy cross-sectional view of a part of a lighting unit including a holding member.

FIG. 4 is a yz sectional view of a lighting unit including an optical axis of the projector.

FIG. 5 is a yz sectional view of a lighting unit including an optical axis of a projector to which different lamps are attached.

FIG. 6 shows the y of the illumination unit including the optical axis of the conventional projector.
z sectional view.

FIG. 7 is a schematic diagram of a part of a lighting unit of the projector according to the second embodiment.

FIG. 8 is a vertical cross-sectional view including an optical axis of a part of a lighting unit of the projector according to the second embodiment.

FIG. 9 is a cross-sectional view of a part of a lighting unit of a projector according to a third embodiment including a lamp central axis.

FIG. 10 is a configuration diagram of an entire lighting unit to which the lamp unit according to the third embodiment is attached.

FIG. 11 is a schematic diagram of a data input unit common to the projectors of the first to fourth embodiments.

FIG. 12 is a circuit block diagram of a portion related to voltage switching means of the projector according to the first to fourth embodiments.

FIG. 13 is a diagram showing a state of a change in a light emission amount with respect to a power-on time based on control of a voltage switching unit.

FIG. 14 is a schematic configuration diagram of a projector according to a fifth embodiment.

FIG. 15 is a block configuration diagram of a portion related to a temperature control unit of the projector according to the fifth embodiment.

FIG. 16 is a diagram showing a general relationship between lamp temperature and brightness.

FIG. 17 is a diagram illustrating a state of a temperature change with respect to time based on control of a temperature control unit.

FIG. 18 is a diagram illustrating a state of a temperature change with respect to time based on control of a temperature control unit when an instruction to turn on an image is issued at a time different from that in FIG. 17;

FIG. 19 is a diagram illustrating a state of a temperature change based on preheating control in a projector according to a fifth embodiment.

FIG. 20 is a view showing a control flow relating to temperature control of the projector according to the fifth embodiment.

FIG. 21 is a diagram schematically illustrating a difference in an illumination area due to a difference in a lamp position in the projector according to the sixth embodiment.

FIG. 22 is a diagram schematically illustrating a difference in lamp position at which the illumination brightness of the lamp is optimal due to a difference in lamp type in the projector according to the sixth embodiment.

FIG. 23 is a diagram schematically illustrating a difference in an illumination area due to a difference in the position of a reflector in the projector according to the seventh embodiment.

FIG. 24 is a diagram schematically illustrating a difference in the position of a reflective umbrella at which the illumination brightness of the lamp is optimal due to a difference in the type of the lamp in the projector according to the seventh embodiment.

FIG. 25 is a sectional view showing a schematic configuration of a projector according to an eighth embodiment.

FIG. 26 is a sectional view showing a schematic configuration of a projector according to a ninth embodiment.

FIG. 27 is a sectional view showing a schematic configuration of a projector according to a tenth embodiment.

FIG. 28 is a sectional view showing a schematic configuration of a projector according to an eleventh embodiment.

FIG. 29 is a sectional view showing a schematic configuration of a projector according to a twelfth embodiment.

FIG. 30 is a sectional view showing a schematic configuration of a projector according to a thirteenth embodiment.

FIG. 31 is a detailed configuration diagram of a diaphragm and a motor for adjusting the diaphragm of the projector according to the thirteenth embodiment.

FIG. 32 is a sectional view showing a schematic configuration of a projector according to a fourteenth embodiment.

FIG. 33 is a diagram showing a schematic configuration of a conventional projector.

FIG. 34 is a diagram showing a relationship between brightness of various lamps and power consumption.

FIG. 35 is a schematic configuration diagram of another holding member in the illumination unit according to the first and second embodiments.

FIG. 36 is a view showing the movement of the holding member shown in FIG. 35.

FIG. 37 is a configuration diagram of an entire lighting unit to which the lamp unit according to the fourth embodiment is attached.

FIG. 38 is a vertical sectional view of the lamp unit according to the fifth embodiment.

[Explanation of symbols]

 1, 15, 55, 80 Lamp 1a Light-emitting part 1b Held part 2 Reflective umbrella 2a Notch part 5RR Liquid crystal panel 5G Liquid crystal panel 5B Liquid crystal panel for B 7 Projection lens 8 Base 9 Holding member 10 x direction adjusting member 11 y direction adjusting member 12 z direction adjusting member 14, 23 stopper 17 fixing member 21 box 22 reflector 27 lamp unit 36 data input unit 50 control unit 51 light emission amount data holding unit 52 light emission amount monitor 53 first Power supply 54 second power supply 60 fan 62 atmospheric temperature detection device 64 lamp temperature detection sensor 66 second cooling means 67 heater

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasumasa Sawai 2-3-13 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Co., Ltd.

Claims (3)

[Claims] 1. A display unit for spatially modulating illumination light based on a video signal to form an optical image for projection, a lamp for a light source, and a reflector arranged so as to surround the lamp. In a projector having an illuminating means for generating and a projection optical system for projecting the optical image on a projection screen, the lamp for the light source can be replaced with a different type of lamp, depending on the type of the attached lamp. And a control means for performing control based on the information input by the input means. 2. The projector according to claim 1, wherein the lamp is replaced independently. 3. The projector according to claim 1, wherein the lamp is exchanged together with the reflector.