JP2007041178A - Projector, attachment thereof, and projector main body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector effectively using a plurality of replaceable attachments so as to project an image in different directions, and to provide the attachments and a projector main body. <P>SOLUTION: When a flat-projection attachment PJb is attached with the projector body PJa, the light quantity of a lamp 90 is reduced, and the image is projected by the projector to a screen Sa on a disk 10. Alternatively, when the horizontal-projection attachment PJc is attached with the projector body PJa, the light quantity of the lamp 90 is increased, and the image is projected by the projector to a screen Sb as a vertical projection screen. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a projector, its attachment, and a projector body.

Conventionally, as this type of projector, for example, there is a projector disclosed in Patent Document 1 below. In this projector, the projection direction of the image projected by the projection optical system is changed by the reflection mirror, and is reflected toward the projection plane in various directions. Here, the projection plane is perpendicular to the installation plane of the projector.
JP 2002-090879 A

  By the way, the projector is usually used by being installed on a desk top surface or a ceiling surface. In such a state of use, the projector can project an image at a correct position on a projection surface perpendicular to the desk top surface or the ceiling surface, but is correctly oriented to a horizontal projection surface on the desk top surface or the ceiling surface. This causes a problem that an image cannot be projected.

  Therefore, in order to deal with the above-described problems, the present invention effectively utilizes a plurality of attachments having different projection directions or the like that can be replaced to project an image in different directions, the attachment, and the projector. The purpose is to provide a body.

In solving the above-described problem, a projector according to the present invention provides a projector according to claim 1.
Display means for displaying an image and projection means for optically projecting a display image from the display means.

In the projector, at least a projector main body incorporating a display means;
A plurality of attachments that incorporate at least a part of the projection means and are detachably assembled to the projector body;
At least two of the plurality of attachments are characterized in that the projection directions of the projection means with respect to the display image from the display means are different from each other when assembled to the projector body.

  As a result, even if the position of the projector body is maintained as it is, it is possible to project onto the projection surface corresponding to the projection direction by selecting the attachment to be assembled to the projector body according to the desired projection direction. Become. In other words, an image can be projected on projection planes in various directions depending on the selection of the attachment.

According to a second aspect of the present invention, in the projector according to the first aspect,
When at least one of the plurality of attachments is assembled to the projector main body, the projection unit projects the display image from the display unit toward at least one of the downward direction and the upward direction of the projection unit. And

  As a result, at least one of the multiple attachments has an attachment that can project upward or downward on the projection means. Select the attachment and install it on the projector body to install it on the floor, projector installation surface, or ceiling surface. The display image from the display means can be easily displayed on the projection surface corresponding to the upward or downward direction of the projection means (for example, in addition to the vertical direction, including a substantially vertical direction such as an obliquely forward upward direction or an obliquely forward downward direction). Can be projected onto the screen.

  According to a third aspect of the present invention, in the projector according to the first or second aspect, when at least one of the plurality of attachments is assembled to the projector body, the display is directed horizontally. The display image from the means is projected by the projecting means.

  As described above, since there is an attachment that can project in the horizontal direction on at least one of the plurality of attachments, a projection plane corresponding to the projection in the horizontal direction of the projection means, that is, by selecting the attachment and assembling it to the projector body, that is, In addition, the display image from the display means can be easily projected onto a vertical projection plane such as a plane positioned perpendicular to a horizontal plane such as the floor or the installation plane of the projector.

According to a fourth aspect of the present invention, in the projector according to any one of the first to third aspects,
When the attachment is assembled to the projector main body, it is characterized by comprising attachment information detecting means for detecting at least one of identification information for identifying the attachment and information related to the attachment.

  According to this, in achieving the operational effect of the invention according to any one of claims 1 to 3, at least one of the identification information for identifying the attachment and the information regarding the attachment is detected by the attachment information detecting means. Thus, at least one of both the identification information of the attachment assembled to the projector main body and the information related to the attachment is obtained.

According to a fifth aspect of the present invention, in the projector according to the fourth aspect,
It is characterized by comprising information notifying means for notifying at least one of both identification information for identifying an attachment and information on the attachment.

  Thereby, at least one of both the identification information of the attachment assembled to the projector main body and the information related to the attachment can be quickly recognized. As a result, the function and effect of the invention of claim 4 can be further improved.

According to a sixth aspect of the present invention, in the projector according to the fourth or fifth aspect,
Image control means for controlling an image displayed by the display means based on at least one of both identification information for identifying the attachment and information relating to the attachment is provided.

  Thereby, if at least one of both the identification information of the attachment identified by the identification information and the information related to the attachment corresponds to the downward projection projection, the projection distance of the projector is short. For this reason, the brightness on the projection plane of the display image by the display means has a sufficient margin and sometimes tends to be excessive. Therefore, the brightness of the display image can be controlled to be lowered.

  This control prevents the display image from becoming excessively bright on the projection surface even when the projection unit projects downward, and reduces power consumption within an appropriate brightness. It becomes possible to suppress.

  Further, at least one of both the identification information of the attachment identified by the identification information and the information related to the attachment corresponds to an attachment for projecting upward of the projection means or projecting in the horizontal direction of the projection means. If so, the brightness of the display image projected by the display means tends to be insufficient because the projection distance of the projector is long, so that the brightness of the display image displayed by the display means can be controlled to be high.

  By controlling in this way, even if the projection unit projects upward or the projection unit projects in the horizontal direction, the display image has a good brightness on the projection plane without a lack of brightness. It becomes easier to see.

  According to a seventh aspect of the present invention, the attachment according to the seventh aspect is an attachment that is detachably assembled to the projector main body provided in the projector according to any one of the first to sixth aspects.

  Thereby, as an attachment suitable for the projector that achieves the operational effects of the invention according to any one of claims 1 to 6, an attachment that enables projection of a new specification (for example, in a new projection direction) can be added. Provision is possible.

  According to the eighth aspect of the present invention, the projector main body is a projector main body provided in the projector according to any one of the first to sixth aspects.

  As a result, a projector main body that enables projection of a new specification (for example, in a new projection direction) as a projector main body suitable for the projector that achieves the operational effects of the invention according to any one of claims 1 to 6. Additional provisions are possible.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 7 show an embodiment of a projector according to the present invention. As shown in FIG. 1 or FIG. 4, the projector includes a projector main body PJa, and a downward projection attachment PJb and a horizontal projection attachment PJc that are detachably attached to the projector main body PJa. In the present embodiment, the downward projection is performed by projecting downward in an imaging optical system 140 (described later) of the projector (an imaging optical system 140 such as an installation surface of the projector or a horizontal plane close to the installation surface). Corresponds to the projection onto the lower horizontal projection plane). Further, the horizontal projection means a projection in the horizontal direction of the imaging optical system 140 of the projector (corresponding to a projection on a vertical projection plane positioned perpendicular to a horizontal plane such as a floor or the installation surface of the projector). To do.

  In the present embodiment, the projector is erected on the end of the desk 10. 1 and 4, the left side, right side, front side and back side of the page of the projector correspond to the front side, rear side, left side, and right side of the projector.

  The projector main body PJa includes a housing member 20, and the housing member 20 is erected on the bottom wall 21 on the end portion of the desk 10 as shown in FIGS.

  The housing member 20 includes a step portion 20a for assembling any one of the attachments PJb and PJc as shown in an enlarged view in FIG. 2 or FIG. At the upper part on the wall side, the bottom wall 22 and the rear wall 23 are formed in an L-shaped cross section.

  The projector main body PJa includes an operation panel P, a control unit U, a lamp 90, an illumination optical system 100, and a transmissive liquid crystal panel 110 (hereinafter also referred to as an LCD 110), as can be seen from FIG. .

  The operation panel P is provided at an appropriate position on the outer wall of the housing member 20, and the operation panel P outputs an operation output to the control unit U under selective operation of a plurality of push-type operation keys (not shown). input.

  As shown in FIGS. 1 to 6, the control unit U is disposed in the body portion of the housing member 20. The control unit U includes the operation panel P, the lamp 90, and the LCD 110 as shown in FIG. Connected between.

  As shown in FIG. 7, the control unit U includes a microcomputer 30 and magnetic detectors 40a and 40b. The microcomputer 30 is formed by connecting a CPU, a ROM, and a RAM via a bus line. The microcomputer 30 uses the CPU to perform processing based on the operation input of the operation panel P and the magnetic detectors 40a and 40b. Various processes such as identification processing for attachments based on each detection signal, identification processing for information about the attachments (for example, projection direction), driving processing and output processing for the lamp driving circuit 50 based on the identification processing are performed.

  As shown in FIGS. 1 to 6, the magnetic detectors 40 a and 40 b are respectively provided from the inside of the housing member 20 above and below the rear wall 23 of the rear wall 23 of the step portion 20 a of the housing member 20.

  Therefore, when only the magnetic detector 40a detects the presence of the magnet 160 (described later) of the attachment PJb, a detection signal is generated at a high level. Further, when the magnetic detectors 40a and 40b detect the presence of magnets 200 and 210 (described later) of the attachment PJc, respectively, they generate detection signals at a high level. When the magnetic detector 40a does not detect the presence of the magnet 160 or 200, the level of the detection signal from the magnetic detector 40a becomes a low level. Further, when the magnetic detector 40b does not detect the presence of the magnet 210, the level of the detection signal from the magnetic detector 40b becomes a low level. Of the magnetic detectors 40a and 40b, the one that does not detect the magnet (magnetic force) generates (continues) a low-level detection signal.

  The video signal input circuit 70 receives a video signal from an external video device (not shown), converts it into a predetermined format, and outputs it to the image processing circuit 60.

  The image processing circuit 60 performs image data processing such as A-D conversion on the video signal output from the video signal input circuit 70 in a predetermined signal format based on a command from the CPU of the microcomputer 30 and the like. (Hereinafter also referred to as LCD drive circuit 80).

  The LCD drive circuit 80 drives the LCD 110 based on the output of the image data processed from the image processing circuit 60. The configuration of the video signal input circuit 70, the image processing circuit 60, the LCD drive circuit 80, and the like described above is an example, and the video signal output from the external video device is a command from a control circuit such as a CPU of the microcomputer 30. Needless to say, any configuration may be used as long as it is converted into a signal form that can drive the LCD 110.

  The lamp 90 is driven to be lit by the lamp driving circuit 50 under the control of the CPU of the microcomputer 30 and emits light to the illumination optical system 100.

  As shown in FIGS. 1 to 6, the illumination optical system 100 includes a condenser lens 101, a reflection mirror 102, and a relay lens system 103. The condenser lens 101 collects the light emitted from the lamp 90 and emits it toward the reflection mirror 102.

  As shown in FIGS. 1 to 6, the reflection mirror 102 is disposed so as to face both the condenser lens 101 and the relay lens system 103, and the reflection mirror 102 emits light emitted from the condenser lens 101. Is reflected and made incident on the relay lens system 103.

  The relay lens system 103 includes a concave lens and two convex lenses. In the relay lens system 103, the concave lens and the two convex lenses are sequentially arranged so that the center of the lens is positioned on the optical axis. . Accordingly, the relay lens system 103 emits the reflected light from the reflecting mirror 102 toward the LCD 110 as parallel light. The illumination optical system 100 may be anything as long as it can collect the light emitted from the lamp 90 as the light source and irradiate the LCD 110 as the display means substantially uniformly. For example, without using the reflection mirror 102, It is needless to say that the illumination optical system 100 may be configured such that the lamp 90 and the LCD 110 are linearly arranged, and the configuration of the relay lens system 103 is not limited to the above configuration.

  The LCD 110 emits light from the relay lens system 103 of the illumination optical system 100 according to the drive signal output from the LCD drive circuit 80 based on the output of the image data processed by the image processing circuit 60 at each display portion. The output of the image processing circuit 60 is processed as image light by controlling the amount of light transmitted through the image processing circuit 60. This means that the LCD 110 displays a video based on the image data processed output based on the video light.

  Next, the configuration of the attachments PJb and PJc will be described with reference to FIGS. 1 to 6 in relation to the projector main body PJa.

  2, 3, 5, and 6 are, for convenience, a cross-sectional view seen from the right side when viewed from the front of the projector, and the shape of each element such as a claw 25 a described later is also shown in the perspective view. However, the projector actually has a symmetric configuration with respect to its cross section. Accordingly, a claw 25a, a housing member 120, an engagement piece 123, an engagement hole portion 123a, and a sliding portion 121a (see FIGS. 2 and 3), which will be described later, similarly have a symmetric configuration with respect to the cross section. . Similarly, a housing member 170, an engagement piece 173, an engagement hole portion 173a, and a sliding portion 171a (see FIGS. 5 and 6), which will be described later, also have a symmetric configuration with respect to the cross section thereof. In addition, it is not essential that the projector has a symmetric configuration as described above with reference to the cross section.

  The attachment PJb includes a housing member 120 as shown in FIGS. The housing member 120 has a bottom wall 121. A sliding portion 121a is formed at the center in the left-right direction of the bottom wall 121 so as to protrude downward in an inverted T shape. The bottom wall 22 is fitted from the outside so as to be slidable along a groove portion 22a formed in an inverted T shape at the center in the left-right direction.

  Further, the housing member 120 has a rear wall 122, and the rear wall 122 extends upward from the rear end portion of the bottom wall 121. The rear wall 122 forms a circular opening 122a, and this circular opening 122a can be fitted with an annular flange 23b provided in the circular opening 23a of the rear wall 23 of the step 20a. Is located. Note that the circular opening 23 a faces the display surface of the LCD 110. The annular flange 23b is formed to protrude outward from the outer peripheral edge of the opening 23a.

  Further, the housing member 120 has an engagement piece 123, and the engagement piece 123 is fixed on the central portion in the left-right direction of the upper wall 124 of the housing member 120 at the base end portion thereof. It extends toward the claw 25 a provided on the upper wall 25 of the housing member 20. Here, the claw 25 a is formed so as to protrude upward at the center portion in the left-right direction of the upper wall 25 of the housing member 20 at the intermediate portion in the front-rear direction.

  Further, the engagement piece 123 has an engagement hole portion 123 a, and the engagement hole portion 123 a is formed in the engagement piece 123 on the extended end side thereof, so that the claw of the housing member 20 is formed. 25a can be engaged.

  The attachment PJb includes a reflection mirror 130, an imaging optical system 140, and a magnet 160 built in the housing member 120. The imaging optical system 140 and later-described imaging optical systems 180 and 240 correspond to projection means, respectively.

  As shown in FIGS. 1 to 3, the reflection mirror 130 includes a circular opening 122 a of the rear wall 122 and a front half of the incident side lens of the imaging optical system 140 (in FIG. 1). It is arranged so as to oppose the left half of the figure). Thereby, the reflection mirror 130 receives the image light from the LCD 110 that is emitted through the openings 23a and 122a, reflects the image light so as to bend its optical path downward, and forms the imaging optical system. The light is incident on the front half of the incident side lens of the system 140.

  The imaging optical system 140 is composed of a plurality of lenses as shown in FIGS. 1 to 3, and in the imaging optical system 140, the plurality of lenses extends from the incident side lens to the exit side lens, Each of the lenses is sequentially arranged in the reflection direction of the reflection mirror 130 so that the center of the lens is positioned on the optical axis.

  Here, the imaging optical system 140 faces the lower side through the projection port portion 125 of the bottom wall 121 of the housing member 120 at the front half portion of the exit side lens. Accordingly, the imaging optical system 140 receives the reflected image light from the reflection mirror 130 at the front half portion of the incident side lens and emits the light downward from the front half portion of the emission side lens. This means that the projector is in the state of the downward projection (corresponding to the projection onto the lower horizontal projection plane) with the attachment PJc.

  As shown in FIGS. 1 to 3, the magnet 160 is provided in the lower part of the rear wall 122 in the housing member 120 so as to face the magnetic detector 40 b through the lower parts of the rear walls 122 and 23. Yes.

  The attachment PJc includes a housing member 170 as shown in FIGS. The housing member 170 has a bottom wall 171, and a sliding portion 171a is formed in an inverted T-shape downward as shown in FIGS. And is slidably fitted from the outside along the inverted T-shaped groove 22a of the stepped portion 20a.

  The housing member 170 has a rear wall 172, and the rear wall 172 extends upward from the rear end of the bottom wall 171. The rear wall 172 forms a circular opening 172a, and the circular opening 172a is positioned so as to be able to fit with the annular flange 23b of the rear wall 23 of the step 20a.

  Further, the housing member 170 has an engagement piece 173, and the engagement piece 173 is fixed at the base end portion on the central portion in the left-right direction of the upper wall 174 of the housing member 170, It extends toward the claw 25a of the housing member 20 described above. The engagement piece 173 has an engagement hole portion 173a, and this engagement hole portion 173a is formed on the engagement piece 173 on the extended end side thereof, and is connected to the claw 25a of the housing member 20. Engageable.

  Further, the attachment PJc includes an imaging optical system 180 and magnets 200 and 210 built in the housing member 170.

  As shown in FIGS. 4 to 6, the imaging optical system 180 includes a plurality of lenses. In the imaging optical system 180, the plurality of lenses are separated from the incident side lens in the housing member 170. The lens is sequentially arranged from the opening 172a side of the rear wall 172 toward the projection port 175a side so that the center of each lens is located on the optical axis over the exit side lens.

  Here, the incident side lenses of the plurality of lenses are positioned so as to face the LCD 110 through the opening 172a of the rear wall 172 and the opening 23a of the stepped portion 20a in the upper half portion thereof. The projection port portion 175a is formed in the front wall 175 of the housing member 170.

  The imaging optical system 180 configured in this manner receives image light from the LCD 110 at the upper half portion of the incident side lens, and forwards from the upper half portion of the exit side lens through the projection port 175a. Exit. This means that the projector is in the state of the horizontal projection (corresponding to the projection onto the vertical projection plane) with the attachment PJc.

  As shown in FIGS. 4 to 6, the magnets 200 and 210 can face the magnetic detectors 40 a and 40 b described above via the rear wall 172 of the housing member 170 and the lower portions of the rear wall 23 of the stepped portion 20 a. In addition, the housing member 170 is provided below the rear wall 172 in the vertical direction.

In this embodiment configured as described above, the projector will be described separately when it is configured with the projector body PJa and the attachment PJb and when it is configured with the projector body PJa and the attachment PJc.
1. When the projector is composed of the projector main body PJa and the attachment PJb The attachment PJb is assembled to the projector main body PJa as follows.

  First, the projector body PJa is erected on the end of the desk 10 as shown in FIG. At this time, the projector body PJa is erected on the rear wall 23 of the stepped portion 20a so as to face forward.

  Thereafter, the attachment PJb is gripped by the housing member 120 so as to be positioned as shown in FIG. 2 with respect to the step portion 20a of the projector main body PJa. In such a state, the inverted T-shaped sliding portion 121a of the housing member 120 is fitted into the inverted T-shaped groove portion 22a of the bottom wall 22 of the stepped portion 20a. Next, the housing member 120 is guided by the bottom wall 121 toward the rear wall 23 along the bottom wall 22 of the stepped portion 20a.

  Along with this, the engagement piece 123 of the housing member 120 is displaced along the central portion in the left-right direction of the upper wall 25 of the housing member 20. Accordingly, the extended end portion of the engagement piece 123 is bent along the claw 25a of the housing member 20 by its elasticity, and then the engagement hole portion 123a is engaged with the claw 25a of the housing member 20. At this time, the housing member 120 abuts on the rear wall 23 of the stepped portion 20 a at the rear wall 122.

  As a result, the attachment PJb is easily assembled and fixed firmly in the step portion 20a of the projector main body PJa (see FIGS. 1 and 3).

  In such an assembled state, the attachment PJb faces the screen Sa (see FIG. 1) on the desk 10 at the projection port 125. This means that the projector is in a state of performing the downward projection with the attachment PJb. Here, the downward projection refers to projecting onto the lower horizontal projection surface of the imaging optical system 140 of the attachment PJb, that is, the screen Sa on the upper surface of the desk 10.

  In such a stage, when the control unit U is put into an operating state, the microcomputer 30 is accompanied by the processing based on the operation input of the operation panel P and the input of the video signal from the video signal input circuit 70 with its CPU. Various processes such as the process and the identification process of the attachment PJb based on the detection signal of the magnetic detector 40b and the like are performed.

  Under the above processing, when the lamp 90 is driven by the lamp driving circuit 50, the lamp 90 is turned on, and light enters the LCD 110 through the illumination optical system 100.

  When the LCD 110 is driven by the LCD drive circuit 80 based on the image data processed output of the image processing circuit 60, the LCD 110 uses the incident light from the illumination optical system 100 as an image light as a reflection mirror. The light is emitted toward 130. Accordingly, the image light is reflected by the reflecting mirror 130 and enters the front half portion of the incident lens of the imaging optical system 140.

  Then, the imaging optical system 140 projects the image light incident on the front half portion of the incident side lens from the front half portion of the emission side lens onto the screen Sa through the projection port portion 125. This means that the projector performs the above-described downward projection by projecting the display image of the LCD 110 onto the screen Sa.

  Here, as described above, when only the magnetic detector 40b detects the presence of the magnet 160 of the attachment PJb and generates a detection signal at a high level, the microcomputer 30 is based on the detection signal and the like by the CPU. The process of identifying the attachment PJb is performed. Since the attachment identified by this processing is the attachment PJb, the emitted light quantity of the lamp 90 is set to a predetermined low luminance light quantity based on the attachment-light quantity data as described later.

  In the present embodiment, the attachment-light quantity data is introduced for the following reason. That is, when the attachment identified as described above is the attachment PJb, the projection distance from the projection port 125 to the screen Sa is short because of the above-described downward projection. For this reason, the brightness of the display image on the screen Sa has a sufficient margin and sometimes tends to be excessive. Therefore, it is desirable to reduce the brightness of the display image so that it can be easily seen. In addition, if the luminance is set to be low in this way, power consumption can be suppressed in an appropriate brightness.

  As will be described later, when the identification attachment is the attachment PJc, the projection distance from the projection port 175a to the screen Sb (see FIG. 4) is long because of the horizontal projection described above. For this reason, since the brightness of the display image on the screen Sb tends to be insufficient, it is desirable to increase the brightness of the display image so that it can be easily seen.

  Therefore, the above attachment-light quantity data is obtained by reducing the light quantity emitted from the lamp 90 to a predetermined low-luminance light quantity when the identification attachment is the attachment PJb, and the identification attachment is the attachment PJc. In some cases, the amount of light emitted from the lamp 90 is determined to be increased to a predetermined high luminance light amount, and is stored in advance in the ROM of the microcomputer 30.

  Accordingly, when the amount of light emitted from the lamp 90 is set to the predetermined low luminance light amount as described above, the lamp driving circuit 50 is controlled by the microcomputer 30 with its CPU, and the amount of light emitted from the lamp 90 is set to the predetermined amount. The lamp 90 is driven so as to obtain a low-intensity light quantity.

For this reason, the amount of light emitted from the lamp 90 is reduced to the predetermined low-intensity light amount, and the luminance of the light projected from the imaging optical system 140 onto the screen Sa is lowered. As a result, even if the projection distance from the projection port portion 125 of the attachment PJb to the screen Sa is short, the display image on the LCD 110 is projected onto the screen Sa with low brightness and becomes an easy-to-view image, which is also useful for power saving.
2. When the projector is configured with the projector main body PJa and the attachment PJc The attachment PJc is assembled to the projector main body PJa as follows.

  First, as described above, the projector main body PJa is erected on the end portion of the desk 10 so as to face forward at the rear wall 23 of the stepped portion 20a as shown in FIG.

  Thereafter, the attachment PJc is held by the housing member 170 so as to be positioned as shown in FIG. 5 with respect to the step portion 20a of the projector main body PJa. In such a state, the sliding portion 171a of the housing member 170 is fitted into the groove portion 22a of the bottom wall 22 of the stepped portion 20a. Next, the housing member 170 is guided by the bottom wall 171 along the bottom wall 22 of the stepped portion 20 a toward the rear wall 23.

  As a result, the engaging piece 173 of the housing member 170 is displaced along the central portion in the left-right direction of the upper wall 25 of the housing member 20. Then, after the extended end portion of the engagement piece 173 is bent along the claw 25a of the housing member 20 by its elasticity, the engagement hole portion 173a is engaged with the claw 25a of the housing member 20. At this time, the housing member 170 contacts the rear wall 23 of the stepped portion 20a at the rear wall 172.

  Thereby, the attachment PJc is easily assembled and fixed firmly in the step portion 20a of the projector main body PJa (see FIGS. 4 and 6).

  In such an assembled state, the attachment PJc faces the screen Sb (see FIG. 4) at the projection port 175a. This means that the projector is in a state of performing the horizontal projection with the attachment PJc.

  When the attachment PJc is assembled to the projector main body PJa as described above, the magnetic detectors 40a and 40b detect the presence of the magnets 200 and 210 of the attachment PJc, respectively, and generate a detection signal at a high level. .

  At this stage, under the execution of the computer program by the microcomputer 30 similar to that described above, if the lamp 90 is driven by the lamp driving circuit 50 to emit light and enters the LCD 110 through the illumination optical system 100, this The LCD 110 is driven by the LCD drive circuit 80 based on the image data processed output of the image processing circuit 60 and uses the incident light from the illumination optical system 100 as an image light as an incident side of the imaging optical system 180. The light is emitted toward the upper half of the lens. Accordingly, the imaging optical system 180 projects the image light incident on the upper half portion of the incident side lens from the upper half portion of the emission side lens onto the screen Sb through the projection port 175a. The horizontal projection described above is performed.

  Here, as described above, when the magnetic detectors 40a and 40b detect the presence of the magnets 200 and 210 of the attachment PJb and generate a detection signal at a high level, the microcomputer 30 has the CPU. Based on the detection signals from the magnetic detectors 40a and 40b, a process for identifying the attachment PJc is performed. Here, since the attachment identified in this way is the attachment PJc, the emitted light quantity of the lamp 90 is set to a predetermined high luminance light quantity based on the above-mentioned attachment-light quantity data.

  Accordingly, the lamp driving circuit 50 is controlled by the microcomputer 30 to drive the lamp 90 so that the emitted light quantity of the lamp 90 becomes the predetermined high luminance light quantity.

  For this reason, the amount of light emitted from the lamp 90 is increased to the predetermined high-intensity light amount, and the luminance of the light projected from the imaging optical system 180 onto the screen Sb is increased. As a result, even if the projection distance between the projection port of the attachment PJb and the screen Sb is long, the display image on the LCD 110 is projected onto the screen Sb with high brightness and becomes an easy-to-view image.

  As described above, in addition to the projector main body PJa, the downward projection attachment PJb and the horizontal projection attachment PJc are employed, and either the attachment PJb or PJc is assembled to the projector main body PJa as described above. The projector is configured.

  As a result, even if the position of the projector main body PJa is maintained as it is, the projection state by the projector can be easily selected from the downward projection and the horizontal projection by appropriately selecting an attachment to be assembled to the projector main body PJa. Can be set.

  The microcomputer 30 automatically controls the light quantity of the lamp 90 based on the detection signals of the magnetic detectors 40a and 40b. As a result, the light quantity of the lamp 90 is adjusted so as to bring the brightness sufficient for the projection image suitable for the projection direction of the identification attachment assembled to the projector main body PJa. As a result, the projected image on the screen can be visually recognized with good brightness regardless of the above-described downward projection or horizontal projection.

  Next, a modified example of the above embodiment will be described with reference to FIG. 8. In this modified example, in the projector, an upward projection attachment PJd is adopted in addition to the attachments PJb and PJc. . In the present modification, the upward projection means an upward projection (corresponding to a projection on the upper horizontal plane such as the ceiling of the projector) of the imaging optical system 240 (described later) of the projector.

  Hereinafter, the configuration of the attachment PJd will be described in relation to the projector main body PJa.

  The attachment PJd includes a housing member 220 as shown in FIG. The housing member 220 has a bottom wall 221, and a sliding portion 221 a is formed in an inverted T shape downward at the center in the left-right direction of the bottom wall 221. It is fitted from the outside so as to be slidable along the inverted T-shaped groove 22a of the portion 20a.

  The housing member 220 has a rear wall 222, and the rear wall 222 extends upward from the rear end portion of the bottom wall 221 to the upper end portion of the rear wall of the step portion 20a. The rear wall 222 is formed with a circular opening 222a, and the circular opening 222a is positioned so as to be fitted to the annular flange 23b of the rear wall 23 of the step portion 20a.

  Further, the housing member 220 has an engagement piece 223, and the engagement piece 223 is fixed to an upper portion of the rear wall 222 of the housing member 220 at the base end portion thereof, and the housing described above. It extends toward the claw 25a of the member 20.

  The engagement piece 223 has a square-shaped engagement hole 223 a, and the engagement hole 223 a is formed in the engagement piece 223 on the extended end side thereof, so that the housing member 20 It can be engaged with the claw 25a.

  Further, the attachment PJd includes a reflection mirror 230, an imaging optical system 240, and a magnet 250 built in the housing member 220.

  As shown in FIG. 8, the reflection mirror 230 includes a circular opening 222 a of the rear wall 222 and a front half of the incident side lens of the imaging optical system 240 (the left half shown in FIG. 8) in the housing member 220. (Part). Thereby, the reflection mirror 230 receives the image light from the LCD 110 emitted through the openings 23a and 222a, reflects the image light so that the optical path is bent upward, and forms the imaging optical. The light is incident on the front half of the incident side lens of the system 240.

  As shown in FIG. 8, the imaging optical system 240 is composed of a plurality of lenses. In the imaging optical system 240, the plurality of lenses are respectively arranged from the entrance side lens to the exit side lens. They are sequentially arranged in the reflection direction of the reflection mirror 230 so that the center is located on the optical axis.

  Here, the imaging optical system 240 faces upward through the projection port 225 of the upper wall 224 of the housing member 220 at the front half portion of the exit side lens. Accordingly, the imaging optical system 240 receives the reflected image light from the reflection mirror 230 at the front half portion of the incident side lens and emits the light upward from the front half portion of the emission side lens. This means that the projector is in the above-described upward projection state with the attachment PJd.

  As shown in FIG. 8, the magnet 250 is provided in the lower part of the rear wall 222 in the housing member 220 so as to be opposed to the magnetic detector 40 a via the lower parts of the rear walls 222 and 23. As a result, the magnetic detector 40a detects the presence of the magnet 250 and generates a detection signal at a high level as the attachment PJd is assembled to the stepped portion 20a. Other configurations are the same as those in the first embodiment.

  In this modified example configured as described above, the attachment PJd is assembled to the projector main body PJa as follows.

  In the same manner as described above, the attachment PJd is held by the housing member 220 in a state where the projector main body PJa is erected on the end portion of the desk 10 so as to face the front wall 23 at the rear wall 23. The inverted T-shaped sliding portion 221a of the housing member 220 is fitted into the inverted T-shaped groove portion 22a of the stepped portion 20a. Next, the housing member 220 is guided by the bottom wall 221 toward the rear wall 23 along the bottom wall 22 of the stepped portion 20a.

  Accordingly, the engagement piece 223 of the housing member 220 is curved along the left end portion of the upper wall 25 of the housing member 20. Then, after the extended end portion of the engagement piece 223 is bent along the front wall of the claw 25a of the housing member 20 by its elasticity, the engagement hole portion 223a engages with the claw 25a of the housing member 20. At this time, the housing member 220 comes into contact with the rear wall 23 of the stepped portion 20a at the rear wall 222.

  Thereby, the attachment PJd is easily assembled and fixed firmly in the step portion 20a of the projector main body PJa (see FIG. 8).

  In such an assembled state, the attachment PJd faces the ceiling screen Sc at the projection port 225. This means that the projector is in the state of performing the upward projection described above with the attachment PJd.

  As described above, when the attachment PJd is assembled to the projector main body PJa, only the magnetic detector 40a detects the presence of the magnet 250 of the attachment PJd and generates a detection signal at a high level.

  At this stage, under the execution of the computer program by the microcomputer 30 similar to that described in the above embodiment, the lamp 90 is driven by the lamp driving circuit 50 to emit light and passes through the illumination optical system 100 to the LCD 110. If incident, the LCD 110 is driven by the LCD driving circuit 80 based on the output of the image data processed by the image processing circuit 60, and image forming optics using the image as video light under the incident light from the illumination optical system 100. The light is emitted toward the front half of the incident side lens of the system 240.

  Accordingly, the imaging optical system 240 projects the image light incident on the front half portion of the incident side lens from the front half portion of the exit side lens onto the screen Sc through the projection port 225. The upward projection described above is performed. Here, the upward projection refers to projecting onto a screen Sc (see FIG. 8) on the projection surface that is horizontally positioned above the imaging optical system 240 of the attachment PJd.

  As described above, when only the magnetic detector 40a detects the presence of the magnet 250 of the attachment PJd and generates a detection signal at a high level, the microcomputer 30 uses the CPU to generate the detection signal or the like. Based on this, a process for identifying the attachment PJd is performed. Here, since the attachment identified in this way is the attachment PJd, the emitted light quantity of the lamp 90 is set to a predetermined high luminance light quantity based on the above-mentioned attachment-light quantity data.

  In the present modification, the predetermined high-intensity light amount in the attachment-light amount data is used because the projection distance between the projection port 225 and the screen Sc in the upward projection is the same as that in the above embodiment. This is because it is generally long like the projection distance between the projection port 175a and the screen Sb in the horizontal projection described above.

  In accordance with the setting of the amount of emitted light as described above, the lamp driving circuit 50 is controlled by the microcomputer 30 with its CPU to drive the lamp 90 so that the amount of emitted light of the lamp 90 becomes the predetermined high luminance light amount. To do.

  For this reason, the amount of light emitted from the lamp 90 is increased to the predetermined high-intensity light amount, and the luminance of the light projected from the imaging optical system 240 onto the screen Sc is increased. As a result, even if the projection distance between the projection port 225 and the screen Sc is long, the display image on the LCD 110 is projected onto the screen Sc with high brightness and becomes an easy-to-view image.

  As described above, this modification employs the above-described upward projection attachment PJd in addition to the projector main body PJa, the downward projection attachment PJb, and the horizontal projection attachment PJc described in the above embodiment. Thus, the projector is configured by being assembled to the projector main body PJa as described above.

  Thus, even if the position of the projector main body PJa is maintained as it is, by selecting the above-mentioned upward projection attachment PJd as an attachment to be attached to the projector main body PJa, the projection direction by the projector is changed to the above downward direction. In addition to projection and horizontal projection, it can be easily set for the upward projection.

  Further, the microcomputer 30 automatically controls the amount of light of the lamp 90 based on the detection signals of the magnetic detectors 40a and 40b with its CPU. As a result, the light quantity of the lamp 90 is adjusted so as to bring the brightness sufficient for the projection image suitable for the projection direction of the identification attachment assembled to the projector main body PJa. As a result, in addition to the downward projection and the horizontal projection, the projected image on the screen can be visually recognized even with the upward projection.

In carrying out the present invention, the following various modifications are possible without being limited to the above-described embodiments and modifications.
(1) The projector according to the present invention is not limited to adopting the downward projection attachment PJb, the horizontal projection attachment PJc, or the upward projection attachment PJd, and includes a plurality of attachments that project in an arbitrary projection direction. It may be adopted. For example, you may employ | adopt the attachment which can project toward the projection surface corresponding to diagonally upward direction or diagonally downward direction.

  Further, the attachment is not limited to an attachment that can switch the projection direction up and down, and an attachment that can project toward a projection plane set in a direction rotated by a predetermined angle in the horizontal direction without changing the orientation of the projector body may be adopted.

In addition, since the projection direction is not limited to the specifications of the projector body, an attachment that can be assembled in an existing projector body and can be projected in a new projection direction will be added as a single unit according to user requests. You can also. For the same reason, it is also possible to add only a new projector main body having a different installation method or the like that can assemble an existing attachment according to a request from a user or the like.
(2) Specific examples of the magnetic detectors 40a and 40b described in the above embodiment include a Hall element or a magnetoresistive element. Moreover, in the said embodiment, although the magnetic detectors 40a and 40b are provided as a means for identifying an attachment, it is not restricted to the magnetic detectors 40a and 40b, For example, it has a light emitting element and a light receiving element. A photodetecting element may be employed.

  In this case, instead of the magnets of the attachments PJb, PJc, and PJd, the light emitting element of the light detection element is provided on the projector main body side, and the light from the light emitting element such as a light receiving element such as a barcode is provided on the attachment side. It is also possible to provide an element for controlling the reflection for each position, and to identify the attachment in accordance with the detection output of the light detection element associated with the attachment of the attachment to the projector body. Further, the shape of the light reflection portion may be changed.

Further, a mechanical switch may be provided on the projector body side, and the attachment may be identified by switching the switch on and off in the shape of the portion corresponding to the switch on the attachment side.
(3) The projector is not limited to a desktop type that is used by being placed on a desk surface or being fixed. For example, the projector may be a hanging type that is suspended and fixed on the ceiling, or substantially perpendicular to the floor. It may be a wall-hanging type that is used by being hooked on a surface or fixed.
(4) The attachment identified as described above may be displayed on an LCD provided separately, displayed by turning on an LED or the like, or other various notification means. At the same time, the attachment PJb, the attachment PJc, or the attachment PJd may also be detected, and the completion of the assembly may be detected as the detected attachment state so that the projector can be turned on for the first time.
(5) Instead of the attachment-light quantity data, attachment-projection direction data or attachment-projection magnification data may be employed.

  Here, the attachment-projection direction data is specified by data representing the relationship between one of the identified attachments PJb, PJc, and PJd and the projection direction corresponding to the identified attachment. Further, the attachment-projection magnification data is specified by data representing the relationship between any one of the identified attachments PJb, PJc, and PJd and the projection magnification corresponding to the identified attachment.

Thus, the above-mentioned attachment-projection direction data and attachment-projection magnification data are stored in advance in the ROM of the microcomputer 30, and the projection direction and projection determined based on the attachment-projection direction data and attachment-projection magnification data. The magnification may be displayed on the separate LCD described above. According to this, since the user can confirm the projection direction or the projection magnification prior to the lighting of the lamp 90, it is possible to quickly cope with an attachment attachment mistake and to quickly attach a desired attachment.
(6) If the reflecting mirror described in the above embodiment and the imaging optical system provided corresponding to the reflecting mirror are installed at an appropriate angle or position with respect to the optical axis of the image light emitted from the LCD 110, Attachments that can be projected in various directions can be easily supplied.
(7) The microcomputer 30 uses the CPU to identify the completion of attachment of the attachment before identifying the attachment or identifying information on the attachment based on the detection signals of the magnetic detectors 40a and 40b. Also good.
(8) The groove portion 22a formed in the bottom wall 22 of the step portion 20a of the projector main body PJa is not limited to the central portion in the left-right direction of the bottom wall 22, but may be formed, for example, on both left and right side portions of the bottom wall 22. Also good. In accordance with this, the sliding part 121a, 171a or 221a formed on the bottom wall 121, 171 or 221 of the attachment PJb, PJc or PJd is not the central part in the left-right direction of the bottom wall but the left and right sides of the bottom wall. Form on both sides.
(9) The claw 25a provided on the upper wall 25 of the housing member 20 of the projector main body PJa is not limited to the central portion in the left-right direction of the upper wall 25, and may be provided on both the left and right sides of the upper wall 25. . In accordance with this, the engagement pieces 123, 173, or 223 formed on the upper wall of the attachment PJb, PJc, or PJd are formed on the left and right sides of the upper wall, not on the center in the left-right direction of the upper wall. To do.

1 is a schematic cross-sectional view showing an embodiment of a desktop projector according to the present invention in a state in which a downward projection attachment is assembled to a projector body. It is a schematic cross-sectional perspective view which shows the said embodiment in the state before assembling | attaching the downward projection attachment to a projector main body. It is a schematic cross-sectional perspective view which shows the said embodiment in the state which assembled | attached the downward projection attachment to the projector main body. It is a schematic sectional drawing which shows the said embodiment in the state which assembled | attached the projection for horizontal direction to the projector main body. It is a schematic cross-sectional perspective view which shows the said embodiment in the state before attaching the attachment for horizontal direction projections to a projector main body. It is a schematic cross-sectional perspective view which shows the said embodiment in the state which assembled | attached the projection for horizontal direction to the projector main body. It is a block circuit diagram in the embodiment. It is a schematic sectional drawing which shows the modification of the said embodiment.

Explanation of symbols

PJa: Projector body, PJb: Downward projection attachment,
PJc: Attachment for horizontal projection, PJd: Attachment for upward projection,
U ... control unit 20, 120, 170, 220 ... housing member,
30 ... Microcomputer, 40a, 40b ... Magnetic detector, 50 ... Lamp drive circuit,
90 ... lamp, 100 ... illumination optical system, 110 ... LCD,
140, 180, 240 ... imaging optical system, 160, 200, 210, 250 ... magnets.

Claims (8)

In a projector comprising display means for displaying an image and projection means for optically projecting a display image from the display means,
A projector body incorporating at least the display means;
A plurality of attachments that incorporate at least a part of the projection means and are detachably assembled to the projector body,
At least two of the plurality of attachments differ in projection direction of the projection unit with respect to a display image from the display unit when assembled to the projector body.   When at least one of the plurality of attachments is assembled to the projector body, the display unit directs a display image from the display unit toward at least one of the downward direction and the upward direction of the projection unit. The projector according to claim 1, wherein the projector is projected.   3. The projector according to claim 1, wherein at least one of the plurality of attachments projects a display image from the display unit by the projection unit in a horizontal direction when assembled to the projector main body. The projector described.   The attachment information detection means for detecting at least one of both identification information for identifying the attachment and information on the attachment when the attachment is assembled to the projector body. The projector as described in any one.   The projector according to claim 4, further comprising an information notification unit that notifies at least one of identification information for identifying the attachment and information regarding the attachment.   6. The image control means for controlling an image displayed by the display means based on at least one of both identification information for identifying the attachment and information on the attachment. Projector.   An attachment that is detachably assembled to the projector main body provided in the projector according to claim 1. The projector main body with which the projector as described in any one of Claims 1-6 is equipped.

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