JP2009244795A - Projector apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce labor and time needed to set an angle and a distance between a projection screen and a projector apparatus, in projecting projection light from the projector apparatus to the projection screen, and also, to reduce the noise of a cooling fan. <P>SOLUTION: The projector apparatus 1 integrally includes a projection screen fixing part 4 having a fixing part 6 for fixing the projection screen 7, and disposed so that it can expand/contract in the projection light projecting direction. A housing 2 includes a cooling opening 5 that is disposed adjacent to the contracted projection screen fixing part 4, in communication with the inside of the housing 2. The open area of the opening 5 is enlarged by expanding the projection screen fixing part 4 in the projection light projecting direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector apparatus in which a projector for projecting an image and a screen holder for installing a screen for displaying the projected image are integrally formed.

  In a meeting or presentation, a projector and a personal computer (hereinafter referred to as a PC) are generally connected, and image data output from the PC is displayed by the projector. This is because the projector and the PC are convenient to carry, and if necessary, the projector and the PC can be installed on a conference table or the like, and a projection image can be projected onto the screen or wall.

  However, in general, the projector and the screen are installed separately, or the projector is installed using the indoor wall as the screen, so that the projected image from the projector has a required size and the direction of the projected image. And it takes time to focus. In view of this, there has been proposed a projector apparatus in which the projector and the screen are integrally formed, and the troubles such as the installation of the screen and the adjustment of the focus of the projected image projected onto the screen are eliminated.

Patent Document 1 describes a projector device that includes a screen and a projector that projects an image on the screen. The projector includes a projector main body that projects an image and a storage portion that stores the projector main body, and the storage portion and a leg portion that holds the screen are connected by two cords on the left and right. The distance between the screen and the projector is determined by the lengths of the two left and right cords. The cord-like body has a structure wound by a reel. The distance between the screen and the projector and the direction of the screen relative to the projector can be easily set by rotating the reel to release the cord-like body.
JP-A-2005-115156

  However, the projector device described in Patent Document 1 connects the projector and the screen with a string-like cord-like body, and is not a structure in which stress that separates the distance between the projector and the screen always works. The cord is easy to loosen. When the cord-like body is loosened, the distance between the projector and the screen and the direction in which the projector is positioned with respect to the screen surface are changed. Therefore, it takes time and effort to separate the screen and the projector every time the cord-like body is loosened. Further, since the projector main body is stored in a storage section with casters, it cannot be said that the projector main body can be easily carried.

  In the present invention, the following means have been taken in order to solve the above problems.

  In the invention according to claim 1, a light source, a light modulation unit that converts light from the light source into projection light, a projection optical system that projects the projection light toward a projection surface, the light source, and the light modulation And a housing for housing the projection optical system, the projector device having a fixing unit for fixing the projection surface, and capable of expanding and contracting in a direction in which the projection light is projected The projector further includes an installed projection plane fixing section, and the casing includes a cooling opening that is in proximity to the degenerated projection plane fixing section and communicates with the interior of the casing. By extending the surface fixing portion in the direction in which the projection light is projected, the projector device has an enlarged opening area.

  According to a second aspect of the present invention, the projector apparatus according to the first aspect further includes a detection unit for detecting whether or not the projection plane fixing unit is extended and / or detecting an extension amount. .

  In the invention which concerns on Claim 3, it is provided with the cooling control part which controls the number of rotations of the cooling fan for cooling, and the cooling control part according to the extension amount of the projection plane fixing part which the detection part detects, The projector device according to claim 2, wherein the number of rotations of the cooling fan is controlled.

  In the invention which concerns on Claim 4, the light source control part which controls the light emission intensity | strength of the said light source is provided, The said light source control part of the said light source according to the expansion | extension amount of the said projection surface fixing | fixed part which the said detection part detects The projector device according to claim 2, wherein the light emission intensity is controlled.

  The invention according to claim 5 includes a focus adjustment unit for adjusting a focus of a projection image projected on the projection plane, and the focus adjustment unit extends the projection plane fixing unit detected by the detection unit. The projector apparatus according to claim 2, wherein the focus of the projection image projected by the projection optical system is adjusted according to the amount.

  According to a sixth aspect of the present invention, in the projector device according to any one of the first to fifth aspects, the light source is a solid light emitting element.

  The projector apparatus according to the present invention further includes a projection plane fixing section that has a fixing section for fixing the projection plane, and is installed so as to be able to expand and contract in the direction in which the projection light is projected. A cooling opening that communicates with the interior of the housing is provided close to the projection plane fixing part, and the opening area is expanded by extending the projection plane fixing part in the direction in which the projection light is projected. I tried to do it. Since the projection unit and the fixing unit that fixes the screen on which the projection surface is formed are integrally configured, the distance between the projection unit and the projection surface is fixed, and a projector device that is easy to carry can be provided. . In addition, since the opening area provided in the housing expands the opening area when the projection plane fixing part is extended, the cooling effect can be exhibited during use, and when not used, the opening area of the opening is reduced, It becomes difficult for dust and the like to enter the housing.

  In addition, a detection unit for detecting whether or not the projection plane fixing unit is extended and / or the amount of extension is further provided. As a result, position information associated with the extension of the projection plane fixing unit is generated, and the emission intensity of the light source, the focus of the projection image, and the like can be adjusted in conjunction with this position information.

  In addition, a cooling control unit that controls the number of rotations of the cooling fan for cooling is provided, and the cooling control unit controls the number of rotations of the cooling fan according to the extension amount of the projection plane fixing unit detected by the detection unit. did. Since the number of rotations of the cooling fan is controlled according to the extension amount of the projection plane fixing part, it is possible to reduce the generation of noise associated with the cooling fan and reduce the power consumption by the cooling fan.

  In addition, a light source control unit that controls the light emission intensity of the light source is provided, and the light source control unit controls the light emission intensity of the light source according to the extension amount of the projection plane fixing unit detected by the detection unit. As a result, it is possible to correct a change in the brightness of the projected image due to a change in the distance between the projection surface and the housing, for example, to project a projected image having a constant brightness, and at the same time, to open the cooling opening. It is possible to prevent heat from accumulating inside the housing due to an increase in area. In addition, when the cooling fan and the cooling fan control unit are provided, the output of the light source changes according to the extension amount, and the cooling fan can be rotated by a necessary amount accordingly, thereby improving the cooling efficiency. At the same time, noise accompanying rotation of the cooling fan can be reduced, and power consumption can also be reduced.

  In addition, a focus adjustment unit for adjusting the focus of the projection image projected on the projection surface is provided, and the focus adjustment unit is projected by the projection optical system according to the extension amount of the projection surface fixing unit detected by the detection unit. The focus of the projected image is adjusted. Thereby, when the distance between the housing and the projection surface changes, the shift of the focus of the projected image can be automatically adjusted, and the operation becomes simple.

  The light source was a solid light emitting element. Thereby, the light emission intensity of the light source can be changed in stages, and the projector device can be miniaturized.

  The configuration of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram for explaining a basic configuration of a projector apparatus 1 according to the present invention. FIG. 1A is an external view of the projector device 1, FIG. 1B is a perspective view showing a state in which projection light is projected, and FIG. 1C is a schematic diagram of the projector device 1. It is a typical block diagram.

  As shown in FIGS. 1A and 1C, a projector apparatus 1 includes a light source 8 and a light modulation unit that converts light emitted from the light source 8 into projection light based on an image signal or a video signal. 9, a projection optical system 3 that magnifies and projects the projection light from the light modulation unit 9 onto the projection surface 7, a housing 2 that houses these, and a projection surface fixing unit 4 that fixes the projection surface 7. Yes.

  The projection plane fixing unit 4 is installed on the side of the projector device 1 and is configured to be able to expand and contract in the direction in which the projection light is projected. The casing 2 is formed with a cooling opening 5 communicating with the internal space of the casing 2. As shown in FIG. 1B, the opening area of the opening 5 is enlarged when the projection plane fixing section 4 is extended, and the projection plane fixing section 4 is contracted as shown in FIG. 1A. It is provided close to the projection plane fixing part 4 so that the opening area is sometimes reduced.

  The opening 5 is provided for releasing heat generated inside the housing 2 to the outside. When the projector device 1 is driven, the temperature of the internal space of the housing 2, particularly the light source 8, rises. If the temperature of the light source 8 increases excessively, the light emission efficiency decreases. Moreover, when the temperature in the housing | casing 2 rises, the function of the component accommodated in the housing | casing 2 will fall or deteriorate. By releasing heat from the opening 5 to the outside, it is possible to prevent a decrease in luminous efficiency and a decrease in function or deterioration of each component.

  The projection plane fixing unit 4 is installed so as to have a predetermined length when extended from the housing 2. A projection surface 7 made of a screen or the like is fixed to the distal end portion of the projection surface fixing portion 4. For this reason, there is a fixed distance between the projection optical system 3 and the projection plane 7. By focusing the projection image projected from the projection optical system 3 at this distance in advance, when the projector device 1 is started and an operation for displaying the projection image on the projection surface 7 is performed, focus adjustment of the projection image is performed. Is no longer necessary.

  Thus, when the projector device 1 is not used, the opening area of the opening 5 is reduced, so that dust and foreign matter can be prevented from entering the inside of the housing 2 from the opening 5 during storage. Can do. In addition, when the projection plane fixing unit 4 is extended using the projector device 1, the opening area of the opening 5 is expanded and the cooling efficiency can be increased. Further, since the projection plane fixing unit 4 has a predetermined length, it is not necessary to adjust the focus of the projection image during use.

  In addition, a detection unit that detects that the projection plane fixing unit 4 is extended is provided so that the extension of the projection plane fixing unit 4 can be detected. For example, when the projection plane fixing unit 4 extends stepwise or continuously, the detection unit can be configured so that the presence or absence of the extension can be detected. The control unit of the projector apparatus 1 can be configured to adjust the light emission intensity of the light source 8 by controlling the light source control unit that drives the light source 8 based on the detected position information. In addition, a cooling control unit can be provided to control the number of rotations of the cooling fan. Further, the brightness of the projection image projected by the projector device 1 changes according to the distance between the housing 2 and the projection plane 7. Therefore, when the distance between the projection surface 7 and the housing 2 increases, the control unit controls the light source control unit to increase the light emission intensity of the light source 8.

  Further, the opening 5 can be configured such that when the projection plane fixing unit 4 extends, the opening area increases as the extension amount of the projection plane fixing unit 4 increases. For example, the projection surface fixing unit 4 is configured to be extendable in multiple steps, and the opening area of the opening 5 increases as the distance between the projection surface 7 and the housing 2 increases by extending the projection surface fixing unit 4. Is configured to increase in a multistage manner. Further, the detection unit is configured to detect each stage of expansion of the projection plane fixing unit 4. As the distance between the projection surface 7 and the housing 2 becomes longer by extending the projection surface fixing unit 4, the control unit increases the power supplied to the light source 8 based on the position information of the detection unit, The light source control unit is controlled to increase the emission intensity. When the supply power supplied to the light source 8 increases, the amount of heat released from the light source 8 increases. However, since the opening area of the opening 5 is enlarged, the cooling efficiency of the light source 8 is improved, the light source 8 reaches an excessive temperature and the light emission efficiency is lowered, or the internal temperature of the housing 2 is increased, It is possible to prevent the function of the element from being lowered or deteriorated.

  Further, the cooling control unit can control the number of rotations of the cooling fan according to the extension amount of the projection plane fixing unit 4 detected by the detection unit. For example, the number of rotations of the cooling fan can be increased as the extension amount increases. In this case, the opening area of the opening 5 increases and the rotation speed of the cooling fan also increases, so that the cooling efficiency can be effectively improved. In addition, since it is not necessary to always set the cooling fan to the maximum rotation speed, it is possible to reduce noise generated from the rotation of the cooling fan and to reduce power consumption by the cooling fan.

  In addition, a focus adjustment unit for adjusting the focus of the projection image projected on the projection surface 7 can be provided. The detection unit generates position information corresponding to the length of the projection plane fixing unit 4 extended. Based on this position information, the control unit adjusts the focus of the projection image projected by the projection optical system 3 according to the length of the projection plane fixing unit 4. Since the focus of the projection image projected onto the projection plane is adjusted according to the length of the extended projection plane fixing unit 4, it is possible to save the trouble of adjusting the focus of the projection image when the projection plane fixing unit 4 is expanded. be able to.

  As the light source 8, a solid light emitting element can be used. The solid-state light emitting element can change the light emission intensity according to the supplied power. When a light emitting diode is used as the solid light emitting element, for example, a white light emitting diode or a plurality of light emitting diodes that emit three primary colors of red, green, and blue can be used. A mercury lamp or a halogen lamp can be used instead of the light emitting diode. The light modulation unit 9 can use a liquid crystal display element or a DMD (digital micromirror device). The liquid crystal display element can be configured to be capable of color display with a built-in color filter. Also, a monochromatic light source such as red, green or blue is used as the light source, a monochrome display liquid crystal display element is installed corresponding to each color, and a color projection image is projected onto the projection plane 7 by mixing colors with a dichroic mirror or the like. can do.

  Further, the projection plane fixing unit 4 may be installed on the outer surface side of the housing 2 or may be installed on the inner surface side of the housing 2. Further, the installation location of the projection plane fixing unit 4 is not limited to the side surface of the projector device 1 and may be installed on the bottom surface side. Moreover, the projection surface fixing | fixed part 4 may be installed in the side surface of one side, and may be installed in both sides | surfaces.

  Next, the projector apparatus 1 according to the embodiment of the present invention will be specifically described with reference to FIGS. The same portions or portions having the same function are denoted by the same reference numerals.

  FIG. 2 is an external view of the projector device 1. 2A is an external view of the projector device 1 viewed from the back side opposite to the projection side, and FIG. 2B is an external view of the projector device 1 viewed from the projection side. In the present embodiment, the projection plane fixing unit 4 extends in the projection direction in three stages.

  The projector device 1 includes a light source 8, a light modulation unit 9 (all not shown), a projection optical system 3, a housing 2, a projection plane fixing unit 4, and the like. A light source 8, a light modulation unit 9, a projection optical system 3, a control unit, and the like are housed in the housing 2. Projection fixing parts 4, 4 ′ are installed on both side surfaces of the projector device 1. A projection optical system 3 for enlarging and projecting projection light is installed at the center of the projector device 1 and exposed. The projection plane fixing units 4 installed on both side surfaces of the projector device 1 represent a degenerated state. An opening 5 (not shown) is formed in the housing 2 inside the projection plane fixing unit 4. In other words, the projection plane fixing unit 4 is installed close to the housing 2 so as to cover the opening 5 formed in the housing 2 in the contracted state.

  The projection surface fixing part 4 is configured to be capable of extending and retracting in three stages, ie, a first extension part 4a, a second extension part 4b, and a third extension part 4c. As will be described in detail later, the projection plane fixing part 4 includes a third extension part 4c on the outermost side, a second extension part 4b on the inner side thereof, and a first extension part 4a on the inner side thereof. And it is configured to be degenerate. A through hole 50a and a through hole 50b are formed in the outermost third extension portion 4c, and a through hole (not shown) is formed in the second extension portion 4b at a position corresponding to the through hole 50a of the third extension portion 4c. 50c is formed. The first extension 4a can be extended, the second extension 4b can be extended further, and the third extension 4c can be extended further. More specifically, the first extension 4 a is slidably installed on the side surface of the projector device 1 or the side surface of the housing 2. The second extension 4b is slidably installed on the first extension 4a. The third extension 4c is slidably installed on the second extension 4b.

  FIG. 3 is a perspective view of the right half of the projector apparatus 1 showing a state in which the first extension portion 4a is extended. The left half of the projector apparatus 1 has a symmetrical structure with the right half. FIG. 3A shows a state in which the first extension portion 4 a is extended and the first fixing portion 6 a for fixing the projection surface 7 is erected. Two rectangular side plates are arranged in parallel in the first extension portion 4a, and a gap between the two plates constitutes a first fixed portion storage portion 17a for storing the first fixed portion 6a. The 1st extension part 4a and the 1st fixed part 6a are connected so that rotation is possible in connecting part 12a installed in the end. As the first extension 4a extends in the projection direction, the first opening 5a formed on the side surface of the housing 2 opens. Further, a through hole 50c formed in the second extension portion 4b (not shown) and a through hole 50a formed in the third extension portion 4c located corresponding to the through hole 50c are the first opening portion 5a. Communicate with.

  FIG. 3B shows a state in which the projection plane 7 is fixed to the first fixing portion 6a. The projection surface 7 is configured by a reflective or transmissive screen. The first extension 4a is fixed by a notch or the like (not shown) when extended to the maximum. Therefore, the distance between the housing 2 and the projection surface 7 is kept constant. Note that a number of notches may be provided between the first extension 4a and the side of the housing 2 or the projector device 1, and the first extension 4a may be extended in multiple stages. In this case, the opening area of the opening 5 also increases in a multistage manner.

  FIG. 3C shows a state in which the light source 8, the light modulation unit 9, the control unit, and the like are driven to project the projection light 11 onto the projection plane 7. When the light source 8 is turned on, the heat generated by the light source 8 is radiated to the outside through the first opening 5a, the through hole 50c (not shown) and the through hole 50a. Thus, since the light source 8 is cooled, it can prevent that luminous efficiency falls. Further, when the projector device 1 is stored, the opening 5 is closed by retracting the first extension portion 4a, so that dust or the like can be prevented from entering the housing 2.

  FIG. 4 is a perspective view of the right half of the projector apparatus 1 showing a state in which the second extension portion 4b is extended. The left half of the projector apparatus 1 has a symmetrical structure with the right half. FIG. 4A shows a state in which the second extension portion 4b is extended and fixed to the tip of the first extension portion 4a, and the second fixing portion 6b for fixing the projection surface 7 is erected. Yes. The second extension 4b includes two rectangular side plates arranged in parallel. A second fixed portion storage portion 17b for storing the second fixed portion 6b is formed in the upper gap between the two side plates. A protrusion 16a is provided on the surface of the side plate of the first extension 4a. A groove that engages with the protrusion 16a is formed on the inner surface of the side plate of the second extension 4b. The second extension 4b is slidably fixed to the first extension 4a with the protrusions 16a and the grooves engaging with each other.

  A through hole 50c is formed in the lower portion of the extended second extension 4b. When the second extension 4b is retracted, the through hole 50c communicates with the through hole 50a of the third extension 4c located outside and is closed by the first extension 4a located inside. . The upper portion of the second extension portion 4b closes the through hole 50b of the third extension portion 4c when the second extension portion 4b is retracted.

  The second fixing portion 6b includes two fixing pieces 6b1 and 6b2, and is connected to each other at the connecting portion 15 so as to be rotatable. The fixed piece 6b1 and the second extension portion 4b are rotatably connected at a connecting portion 12b installed at the end thereof. The second fixing part 6b folded from the second fixing part storage part 17b is pulled out, extended and stood up. The second fixing portion 6b is approximately twice as high as the first fixing portion 6a in the standing state. By extending the second fixing portion 6b in the projection direction, the second opening 5b formed on the side surface of the housing 2 opens and communicates with the through hole 50b formed in the third extension 4c. As a result, the opening 5 has a first opening 5a and a second opening 5b, the first opening 5a is a through hole 50a, and the second opening 5b is a through hole 50b. Each communicates. That is, the opening area of the opening 5 is further expanded.

  FIG. 4B shows a state where the projection plane 7 is fixed to the second fixing portion 6b. The projection surface 7 is configured by a reflective or transmissive screen. The second extension 4b is fixed by a notch or the like (not shown) when extended to the maximum. Therefore, the distance between the housing 2 and the projection surface 7 is kept constant.

  FIG. 4C shows a state where the light source 8, the light modulation unit 9, the control unit, and the like are driven to project the projection light 11 onto the projection surface 7. When the light source 8 is turned on, the heat generated by the light source 8 is radiated to the outside from the first opening 5a and the second opening 5b. For example, compared to the state shown in FIG. 3C, the distance between the housing 2 and the projection plane 7 is approximately twice as large, and the projected image is enlarged approximately four times in area. . In order to obtain a projected image having the same luminance as that in FIG. 3C, the luminance of the light source 8 needs to be increased. Therefore, the power supplied to the light source 8 increases and the amount of heat radiated from the light source 8 also increases. However, since the cooling area is improved by increasing the opening area of the opening 5, it is possible to suppress a decrease in light emission efficiency due to the temperature rise of the light source 8. In addition, it is possible to reduce the deterioration or deterioration of the function due to the temperature rise of the element housed in the housing 2.

  FIG. 5 is a perspective view of the right half of the projector apparatus 1 showing a state in which the third extension 4c is extended. The left half of the projector apparatus 1 has a symmetrical structure with the right half. FIG. 5A shows a state in which the third extension portion 4c is extended and fixed to the tip of the second extension portion 4b, and the third fixing portion 6c for fixing the projection surface 7 is erected. Yes. The third extension 4c includes two side plates arranged in parallel. A third fixed portion storage portion 17c that stores the third fixed portion 6c is formed in the upper gap between the two side plates. A protrusion 16b is provided on the surface of the side plate of the second extension 4b. A groove that engages with the protrusion 16b is formed on the inner surface of the side plate of the third extension 4c. Furthermore, protrusions (not shown) are formed on the inner side surface and the lower end of the upper end portion of the third extension portion 4 c and engage with grooves (recess portions) (not shown) formed at corresponding positions of the housing 2. The third extension 4c is fixed to be slidable by engaging a not-shown protrusion and a groove (concave portion). When the third extension 4c is further extended, the second extension 4c is fixed. The protrusion 16b of the portion 4b and the groove formed on the inner wall surface of the third extension portion 4c are engaged and fixed to the second extension portion 4b so as to be slidable.

  The third fixing portion 6c includes three fixing pieces 6c1, 6c2, and 6c3. The fixing piece 6c1 and the fixing piece 6c2 are connected to each other by the connecting portion 15a, and the fixing piece 6c2 and the fixing piece 6c3 are connected to each other by the connecting portion 15b. It is connected. The fixed piece 6c1 and the third extension 4c are rotatably connected at a connecting portion 12c installed at the end thereof. The third fixed portion 6c folded from the third fixed portion storage portion 17c is pulled out and extended to stand. The third fixing portion 6c has a height approximately three times that of the first fixing portion 6a in a standing state. By extending the third fixing portion 6c in the projection direction, the third opening 5c formed on the side surface of the housing 2 opens. Thereby, the opening part 5 opens the 1st opening part 5a, the 2nd opening part 5b, and the 3rd opening part 5c. That is, the opening area of the opening 5 is further expanded.

  FIG. 5B shows a state in which the projection plane is fixed to the third fixing portion 6c. The projection surface 7 is configured by a reflective or transmissive screen. The third extension 4c is fixed by a notch or the like (not shown) when extended to the maximum.

  FIG. 5C shows a state in which the light source 8, the light modulation unit 9, the control unit, and the like are driven to project the projection light 11 onto the projection surface 7. When the light source 8 is turned on, heat generated by the light source 8 is radiated to the outside from the opening 5 in which the first opening 5a, the second opening 5b, and the third opening 5c are opened. FIG. 5D shows a state when the state shown in FIG. 5C is viewed from the front side of the projector device 1. The projection surface 7 is fixed substantially vertically by the third fixing portion 6c. In the third fixing portion 6c, three fixing pieces 6c1, 6c2, and 6c3 are connected at the connecting portions 15a and 15b, and are erected substantially vertically at the end portion of the third extension portion 4c. In the third fixing portion 6c, three fixing pieces 6c1, 6c2, and 6c3 are connected at the connecting portions 15a and 15b, and are erected substantially vertically at the end portion of the third extension portion 4c.

  In the case shown in FIG. 5 in which the projection plane fixing part 4 is extended in three stages, the housing 2 and the projection plane 7 are compared with the case shown in FIG. 3C in which the projection plane fixing part 4 is extended in one stage. The distance between the two is approximately three times the distance, and the projected image is enlarged nine times in area. In order to obtain a projected image having the same luminance as that in FIG. 3C, the luminance of the light source 8 needs to be increased. Therefore, the power supplied to the light source 8 increases and the amount of heat radiated from the light source 8 also increases. However, since the cooling area is improved by increasing the opening area of the opening 5, it is possible to suppress a decrease in the light emission efficiency due to the temperature rise of the light source 8. In addition, it is possible to reduce the deterioration or deterioration of the function due to the temperature rise of the element housed in the housing 2.

  2 to 5 is an embodiment of the present invention, and the present invention is not limited to this configuration. As the projection surface fixing part 4, a plurality of rod-like bodies are connected rotatably at the end part, and the opening part 5 of the housing 2 is closed when folded, and the opening area of the opening part 5 is enlarged when extended. It may be configured. Further, as the projection plane fixing portion 4, a plurality of rectangular plates are arranged in parallel, and when the projections are contracted, the plurality of plates are arranged in parallel to close the opening 5, and when extended, the upper or lower plates are sequentially arranged. By sliding and extending, the opening area of the opening 5 can be sequentially expanded. Further, the projection plane fixing portion 4 can be configured like a cross section of a rod antenna, and can be configured to be able to extend and retract by sliding from the center portion. Further, when the projection plane fixing unit 4 is retracted, the projection plane fixing unit 4 is accommodated inside the casing 2, and the casing 2 is provided with an opening 5 in a region close to the contracted projection plane fixing unit 4. It may be.

  FIG. 6 is a schematic partial sectional view of a projector apparatus 1 according to another embodiment of the present invention. In the present embodiment, a detection unit 14 is provided to detect that the projection plane fixing unit 4 has expanded. The same portions or portions having the same function are denoted by the same reference numerals.

  FIG. 6 is a partial cross-sectional view of the left half of the projector apparatus 1, and the right half also has the same structure. The projector device 1 includes a housing 2 that houses a light source 8, a light modulation unit 9, a projection optical system 3, and the like, and a projection surface fixing unit 4 that is installed on the left and right side surfaces of the housing 2. The projection plane fixing part 4 is composed of a first extension part 4a, a second extension part 4b, and a third extension part 4c, similarly to the projector device 1 shown in FIGS.

  The first extension portion 4a is engaged with a recess 13b attached to the casing 2 or the frame of the projector device 1 and a protrusion 16e attached to the inner surface of the first extension portion 4a. The recesses 13a and 13c attached to the frame of the device 1 and the ridges 16d and 16f attached to the inner surface of the third extension 4c are engaged with each other, and the first to third extensions 4a and 4b are engaged. 4c is installed so that it can be expanded and contracted in the direction in which the projection light is projected. In the second extension 4b, the protrusion 16a provided on the outer surface of the first extension 4a is engaged with the recess provided on the inner surface of the second extension 4b. Further, the first extension 4a The upper end of the second extension 4b engages with the lower end of the upper inner wall of the second extension 4b so that the second extension 4b can be extended and retracted in the direction in which the projection light is projected. The third extension portion 4c is engaged with the protrusion 16b provided on the outer side surface of the second extension portion 4b and the recess portion provided on the inner side surface of the third extension portion 4c, so that the upper end of the second extension portion 4b is engaged. And the lower end of the upper inner wall of the third extension 4c engage with each other, and the protrusion 16f provided at the upper end of the third extension 4c and the recess attached to the casing 2 or the frame of the projector device 1 13c is engaged, and the third extension 4c is installed so that it can be extended and retracted in the direction in which the projection light is projected. In other words, each of the first extension portion 4a, the second extension portion 4b, and the third extension portion 4c, or all of them, is installed so as to be able to extend and contract in the direction in which the projection light is projected.

  Further, through holes 50a and 50b are formed in the third extension portion 4c. A through hole 50c is formed in the second extension portion 4b at a position corresponding to the through hole 50a. In a state where the projection plane fixing part 4 is retracted, any of the first opening 5a, the second opening 5b, and the third opening 5c formed in the housing 2 is closed by the projection plane fixing part 4. It is peeling off. As the first extension 4a extends, the first opening 5a communicates with the through hole 50c and the through hole 50a. Similarly, when the second extension 4b extends, the second opening 5b and the through hole 50b communicate with each other.

  In the frame of the housing 2 or the projector device 1, detection units 14 a, 14 b, and 14 c are installed at corresponding positions on the inner wall surfaces of the extension units 4 a, 4 b, and 4 c. The detection unit 14 includes, for example, a light emitting element and a light receiving element that are optical sensors. The light emitted from the light emitting element of the light detection unit 14a is reflected by the inner surface of the first extension 4a and detected by the light receiving element. Since the reflected light intensity is different between the case where the first extension 4a is extended and the case where the first extension 4a is degenerated, the extension and degeneration of the first extension 4a are detected based on the difference in the reflected light intensity. The other detection units 14b and 14c function similarly.

  An opening 5 is formed in the housing 2 on the projection surface fixing unit 4 side. That is, the first opening 5a is formed in the region of the detection unit 14a, the second opening 5b is formed in the region of the detection unit 14b, and the third opening 5c is formed in the region of the detection unit 14c. .

  With this configuration, the control unit of the projector device 1 can be controlled to supply predetermined power to the light source 8 when the detection unit 14a detects the extension of the first extension unit 4a. Similarly, when the detection unit 14b detects the extension of the second extension 4b, the control unit controls to increase the power supplied to the light source 8, and the detection unit 14c controls the third extension 4c. Can be controlled so that the power supplied to the light source 8 by the controller is further increased. That is, the position information regarding the extension amount of the projection plane fixing unit 4 is generated by the detection unit 14, and the control unit controls the light emission intensity of the light source 8 based on the position information.

  FIG. 7 is a schematic partial cross-sectional view of a projector device 1 according to another embodiment of the present invention, and represents the left half of the projector device 1. The projector device 1 includes a housing 2 that houses a light source 8, a light modulation unit 9, a projection optical system 3, the projection surface fixing unit 4 installed on the left and right side surfaces of the housing 2, and a cooling fan 19. ing. The difference from FIG. 6 is that a cooling fan 19 is provided, and the other configurations are basically the same as those in FIG. 6, and thus the description thereof is omitted (in addition, the through holes 50a, 50b and 50c shown in FIG. 6). Is omitted). The same portions or portions having the same function are denoted by the same reference numerals.

  A cooling fan 19 is installed in the vicinity of the openings 5a, 5b, and 5c. When the detection unit 14a detects the extension of the first extension unit 4a, the control unit of the projector device 1 can supply predetermined power to the cooling fan 19 to control the rotation speed of the cooling fan 19. Similarly, when the detection unit 14b detects the extension of the second extension 4b, the control unit controls to change the power supplied to the cooling fan 19 to increase the rotational speed, and the detection unit 14c. When the extension of the third extension 4c is detected, the control unit can change the electric power supplied to the cooling fan 19 to further increase the rotation speed. That is, position information regarding the extension amount of the projection plane fixing unit 4 is generated by the detection unit 14, and the control unit controls to increase the rotation speed of the cooling fan 19 based on the position information.

  As a result, the opening areas of the openings 5a, 5b, and 5c are increased, and the rotational speed of the cooling fan 19 is also increased, so that the cooling efficiency can be effectively increased. Moreover, since it is not necessary to always set the rotation speed of the cooling fan 19 to the maximum value, noise accompanying rotation of the cooling fan 19 can be reduced.

  In addition, the structure of the said detection part 14 and the projection surface fixing | fixed part 4 shows one Embodiment of this invention, and this invention is not limited to this structure. For example, the extension amount of each projection plane fixing unit 4 is continuously measured to detect the distance between the housing 2 and the projection plane 7 in detail, and the light emission intensity of the light source 8 and the rotation speed of the cooling fan 19 are determined. It can be finely adjusted. In addition, as the cooling fan 19, a plurality of cooling fans are installed corresponding to the openings 5a, 5b, and 5c, the corresponding cooling fan is rotated when the opening 5a is opened, and the second opening 5b is opened. The corresponding cooling fan may be rotated, and the corresponding cooling fan may be rotated when the third opening 5c is opened.

  FIG. 8 is a schematic perspective view of the imaging optical system 34 in the projection optical system 3 constituting the projector apparatus 1 of the present invention. The same portions or portions having the same function are denoted by the same reference numerals.

  As shown in FIG. 8, the imaging optical system 34 includes a projection lens unit 46 and a focus adjustment mechanism 40. The focus adjusting mechanism 40 includes a main lens barrel 45, a sub lens barrel 44 incorporated therein, a stepping motor 41 for rotating the sub lens barrel 44 relative to the main lens barrel 45, and the stepping motor. A gear mechanism 42 that transmits the rotation of the motor 41 and a gear portion 43 that is provided on the outer periphery of the secondary lens barrel 44 and transmits the rotation of the gear mechanism 42 to the secondary lens barrel 44 are provided. The projection lens unit 46 includes a plurality of lenses, and magnifies and projects the projection light projected from the light modulation unit 9 onto the projection surface 7.

  The detection unit 14 detects the extension of the projection plane fixing unit 4 and generates position information of the projection plane fixing unit 4. The control unit of the projector apparatus 1 adjusts the focus of the projection image projected on the projection plane 7 by rotating the stepping motor 41 by a predetermined number based on the position information of the projection plane fixing unit 4. For example, in the projector device 1 shown in FIGS. 2 to 6, the control unit stores the number of rotations of the stepping motor 41 corresponding to the extended distance of each of the extension units 4 a, 4 b, and 4 c. Based on the position information generated by the detection unit 14, the control unit controls the stepping motor 41 to rotate according to the number of steps that the projection plane fixing unit 4 has expanded. Thereby, when each extension part of the projection plane fixing part 4 is extended, the focus adjustment is automatically performed, so that the trouble of setting the projector apparatus 1 can be saved.

  FIG. 9 is a functional block diagram of the projector apparatus 1 according to the embodiment of the present invention. The same portions or portions having the same function are denoted by the same reference numerals.

  The projector apparatus 1 includes a CPU 21 that performs arithmetic processing, a RAM 22 as a work area of the CPU 21, a control unit 20 that includes a ROM 23 that stores a control program, a USB I / F 31 that exchanges data with external devices, and video signals. An input video signal input circuit 24, an image data processing circuit 25 for processing video data from the video signal input circuit 24, image data input from the USB I / F 31, image data stored in the ROM 23, and the like, an image data processing circuit 25 The light modulation unit drive circuit 26 that inputs the image data processed by the above and converts it into a drive signal for driving the light modulation unit 9, the light source control unit 28 for driving the light source 8, and the light from the light source 8 Illumination optical system 30 that irradiates the light modulation unit 9 and projection optical system 3 that projects the projection light projected from the light modulation unit 9 on the projection plane 7 The image forming optical system 34, the focus adjustment driving unit 27 for driving the focus adjusting mechanism 40 of the image forming optical system 34, and the position detection that generates the position information by inputting the detection signal from the detecting unit 14 A cooling fan 19 installed in the vicinity of the light source 8, a cooling control unit 29 for controlling the rotation speed of the cooling fan 19, and a bus 35 for transferring data signals and control signals.

  When the projector apparatus 1 is turned on, the CPU 21 stores the control program read from the ROM 23 in the RAM 22 and operates according to the control program. The light source control unit 28 turns on the light source 8, the light modulation unit 9 is irradiated with light through the illumination optical system 30, and the light transmitted through the light modulation unit 9 is enlarged and projected onto the projection plane 7 by the imaging optical system 34. Is done. The video signal input to the video signal input circuit 24 is converted into image data that can be displayed by the light modulation unit 9 by the image data processing circuit 25, and is provided to the light modulation unit 9 via the light modulation unit drive circuit 26. Thus, a projection image corresponding to the video signal is displayed on the projection plane 7.

  When the detector 14 is provided, the operation is as follows. The position detection unit 33 inputs the detection signal of the detection unit 14 and generates position information. The control unit 20 determines the power to be given to the light source 8 from this position information, and gives the power information to the light source control unit 28. The light source control unit 28 changes the light emission intensity of the light source 8 based on the power information given from the control unit. Thereby, even when the distance between the projection surface 7 and the housing | casing 2 changes, the brightness | luminance of the projection image projected on the projection surface 7 can be kept constant. Further, even if the power supplied to the light source 8 changes and the heat generated in the light source 8 increases, the projection plane fixing unit 4 extends in the projection direction, and the opening 5 provided in the housing 2 The opening area is enlarged, and the amount of heat radiation in the housing 2 is increased. Thereby, it is possible to prevent the temperature of the light source 8 and other elements from being excessively increased and the function from being deteriorated.

  When the cooling control unit 29 is provided, the operation is as follows. The position detection unit 33 inputs the detection signal of the detection unit 14 and generates position information. The control unit 20 determines a driving condition related to the rotational speed of the cooling fan 19 from this position information, and gives the driving condition to the cooling control unit 29. The cooling control unit 29 drives the cooling fan 19 according to the given driving conditions. Thereby, even if the expansion amount of the projection plane fixing part 4 increases and the light emission intensity of the light source 8 increases and the heat generation amount increases, the cooling efficiency can be improved. As a result, it is possible to effectively prevent heat from accumulating inside the housing 2 and deteriorating internal elements. In addition, since it is not necessary to always set the cooling fan 19 to the maximum number of rotations, noise generated from the rotation of the cooling fan 19 can be reduced, and power consumption can also be reduced.

  When the focus adjustment mechanism 40 is provided, the operation is as follows. The position detection unit 33 inputs the detection signal of the detection unit 14 and generates position information. The control unit 20 determines the driving condition of the stepping motor 41 from this position information, and gives the driving condition to the focus adjustment driving unit 27. The focus adjustment drive unit 27 drives the focus adjustment mechanism 40 installed in the imaging optical system 34 according to the given drive conditions. Thus, even when the distance between the projection surface 7 and the housing 2 changes, the projection image with the focus adjusted can be projected onto the projection surface 7, so that the projection surface fixing unit 4 can be expanded and contracted. This eliminates the need to adjust the focus each time.

  FIG. 10 is a flowchart showing an example of the operation of the projector apparatus 1 according to the present invention. First, the power switch of the control unit 20 is turned on to start the operation. The CPU 21 of the control unit 20 reads the operation program from the ROM 23 and starts processing using the RAM 22 as a work area. The control unit 20 executes initialization of each unit (step S1). Next, the control unit 20 waits until the position detection unit 33 generates position information (No in step S2). When the projection plane fixing unit 4 of the projector device 1 is expanded, the detection unit 14 detects that the projection plane fixing unit 4 is expanded, and the position detection unit 33 generates position information (Yes in step S2). The control unit 20 stores the detected position information in the RAM 22 (step S3).

  The control unit 20 reads the position information stored in the RAM 22 and the driving condition of the light source 8 corresponding to the position information stored in the ROM 23, and sets the output supplied to the light source control unit 28 to be supplied to the light source 8. In addition, the control unit 20 reads out the position information stored in the RAM 22 and the driving conditions of the focus adjustment driving unit 27 corresponding to the position information stored in the ROM 23, and gives them to the focus adjustment driving unit 27 to provide the imaging optical system 34. Set the output to be supplied to the drive mechanism. Further, the control unit 20 reads out the position information stored in the RAM 22 and the driving condition of the cooling fan corresponding to the position information stored in the ROM 23, and sets the output supplied to the cooling control unit 29 to be supplied to the cooling fan 19. (Step S4). Based on each set output, the light source 8, the focus adjustment drive unit 27, and the cooling fan 19 are driven (step S5). If there is no end instruction, the process returns to step S2. If there is support for termination (Yes in step S6), the process is terminated.

  By driving in this way, when the projection plane fixing unit 4 is extended, the brightness, focus, and cooling of the projection light are automatically set, so that it is easy and simple to project under optimum projection conditions. be able to.

It is explanatory drawing for demonstrating the basic composition of the projector apparatus which concerns on this invention. It is an external view of the projector apparatus which concerns on embodiment of this invention. It is an external view of the projector apparatus which concerns on embodiment of this invention. It is an external view of the projector apparatus which concerns on embodiment of this invention. It is an external view of the projector apparatus which concerns on embodiment of this invention. It is a typical fragmentary sectional view of the projector apparatus which concerns on embodiment of this invention. It is a typical fragmentary sectional view of the projector apparatus which concerns on embodiment of this invention. It is a typical perspective view of the image formation optical system of the projector apparatus which concerns on embodiment of this invention. It is a functional block diagram of the projector apparatus which concerns on embodiment of this invention. It is a flowchart figure showing operation | movement of the projector apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector apparatus 2 Housing | casing 3 Projection optical system 4 Projection surface fixing | fixed part 5 Opening part 6 Fixing part 7 Projection surface 8 Light modulation part

Claims (6)

A light source, a light modulation unit that converts light from the light source into projection light, a projection optical system that projects the projection light toward a projection surface, and the light source, the light modulation unit, and the projection optical system are housed. A projector device comprising a housing,
A fixing unit for fixing the projection surface, further comprising a projection surface fixing unit installed so as to be able to extend and retract in the direction in which the projection light is projected;
The housing includes a cooling opening that is in proximity to the degenerated projection plane fixing portion and communicates with the interior of the housing.
The projector is a projector device in which an opening area is expanded by extending the projection surface fixing unit in a direction in which the projection light is projected.   The projector device according to claim 1, further comprising a detection unit configured to detect whether or not the projection surface fixing unit is extended and / or an extension amount. A cooling control unit that controls the number of rotations of the cooling fan for cooling is provided.
The projector apparatus according to claim 2, wherein the cooling control unit controls the number of rotations of the cooling fan according to an extension amount of the projection plane fixing unit detected by the detection unit. A light source control unit for controlling the light emission intensity of the light source;
The projector device according to claim 2, wherein the light source control unit controls a light emission intensity of the light source according to an extension amount of the projection plane fixing unit detected by the detection unit. A focus adjustment unit for adjusting the focus of the projection image projected on the projection plane;
The focus adjustment unit adjusts a focus of a projection image projected by the projection optical system according to an extension amount of the projection plane fixing unit detected by the detection unit. The projector device according to any one of the above.   The projector device according to claim 1, wherein the light source is a solid light emitting element.