JP4788948B2 - projector - Google Patents

Description

  The present invention relates to a projector device that projects an image based on image information such as a video signal.

Today, video projectors are widely used as image projection apparatuses that project personal computer screens and video images onto a screen.
This projector uses a high-intensity light source, a small high-intensity discharge lamp such as a metal highland lamp or an ultra-high pressure mercury lamp is placed inside the concave reflector as a reflector, and the front surface of the reflector is covered with explosion-proof glass. The lamp unit is often incorporated into a projector as a light source device for the projector.

  In this lamp unit, a rotating parabolic reflector or a rotating ellipsoidal reflector is often used. A high-intensity discharge lamp is installed at the elliptical focal point of the reflector and emitted toward the front and rear. The reflected light is reflected by the rotating parabola or the ellipsoidal reflector and condensed on the light tunnel or light guide rod.

  Then, light from a light source device incorporating a high-intensity discharge lamp such as an ultra-high pressure mercury lamp is sequentially converted into red, green, and blue light using a red filter, a green filter, and a blue filter. The amount of light in an on-state that is allowed to pass through a light guide rod, etc., and then is condensed by a lens onto a micromirror display element generally called DMD and reflected toward the projection port of the projector device by the display element To display a color image on the screen.

  Also, with this projector, various settings such as screen size, brightness, and hue can be performed by operating the key switch provided on the top panel of the projector body or by operating the switch of the remote controller. Therefore, it is possible to project a beautiful image according to the user's preference.

  Adjustment settings such as brightness, hue, and contrast can be adjusted by operating the key switch on the main unit or the key switch of the remote controller, projecting the menu screen on the screen, and projecting and displaying various parameters. Setting operation can be performed while checking.

  In this projector, as described above, a small and high-intensity discharge lamp is used as the light source device. However, in order to reduce the size and weight of the projector, the light source device and the discharge lamp should be used under severe use conditions. Thus, there is a need for lamp replacement.

For this reason, it has been proposed that a spare lamp can be mounted on the light source device of the projector, and that the projector can be resumed in a short time by switching to the spare lamp when the lamp is damaged (for example, Patent Document 1). ).
Further, as described above, although the discharge lamp incorporated in the lamp unit of the projector is a consumable item that needs to be replaced, the lamp unit itself as the light source device is also replaced when the discharge lamp is replaced. (For example, patent document 2).

In such a projector that replaces the entire light source device, a part of the bottom panel for fixing the lamp unit is used as a removable replacement panel, the replacement panel is screwed to the bottom panel, and the replacement screw is removed. Some of the lamp units are removed from the bottom panel together with the lamp unit, and the lamp unit is removed from the projector and replaced.
JP 2001-0565503 A JP 2002-333668

  As described above, a removable replacement panel is provided on a part of the bottom panel, the light source device is fixed inside the replacement panel, and the light source device is removed together with the replacement panel. The light source device can be easily removed together with the replacement panel from the bottom panel by removing the fixing screw.

  However, when this projector is suspended from a ceiling or the like, the projector is structured to project light from a direction inclined with respect to the screen surface, and the bottom panel faces the ceiling and the top panel is suspended, It is difficult to remove the replacement panel provided on the bottom panel close to the ceiling, and there is a problem that it takes time to replace the light source device because the replacement panel is removed after the projector is once removed from the ceiling.

  The present invention solves such problems, and provides a projector in which a light source device can be easily replaced whether used on a table or the like or suspended from a ceiling. It is.

The present invention, in the body case, the light source equipment, the light source side optical system, a display element, a projection side optical system, the cooling fan, further incorporating a circuit board having a lamp power supply circuits and projector control hand stage a projector, a possible opening and remove the light source equipment which has a first panel surface and the second panel surface of the main body case, and close the opening of the first panel surface in the first panel cover the the opening of the second panel surface closed with the second panel cover, more light source equipment to the unit fixing stand is fixed to said second panel cover, connecting the light source device to the lamp power supply circuit at the tip, after An end has a connector shaft, and is provided with a lamp connector that is pivoted up and down and has a semicircular shape centering on the connector shaft, and when the lamp connector is parallel to the second panel surface, The connector shaft on the rear end face Remote it is intended to be that the projector which has a notch in the first panel surface and said second panel surface.

It said first panel Futa及 beauty said second panel lid, secured to said each said first panel surface and the second panel surface from the outside of the exterior case mounting screws, the unit fixing base is from the interior of the projector it may be more immobilized on a solid Teine di to the second panel cover.

Further, the rear end side of the lamp connector has a stopper having a protrusion protruding toward the rear end of the lamp connector, the stopper may also be pressed against the projecting portion to the lamp connector rear end.
The first panel surface is a top panel of the main body case, the second panel surface may be the bottom panel of the main body case.

  The present invention has an opening from which the light source device can be removed on the top panel and the bottom panel of the main body case, so that the light source device can be exchanged from the bottom side or the top side of the projector. While being used in a possible state, the light source device can be easily replaced even when used in a fixed state.

  Further, since the lamp connector can be rotated, it is easy to remove and insert the connection by the lamp connector even when the light source device is removed from the opening of the bottom panel or the light source device is removed from the opening of the top panel. Can be easily exchanged.

  The best mode of the projector 100 according to the present invention includes a light source device 210, a light source side optical system 220, a display element 230, a projection side optical system 250, a cooling fan 190, a lamp power circuit 261, and projector control means. The projector 100 includes a circuit board 269 provided with a 267, and has an opening in which the light source device 210 can be removed in the top panel 110 and the bottom panel 160 of the main body case, and the opening of the top panel 110 is provided outside the main body case. From the inside of the projector 100 by closing the opening of the bottom panel 160 with the bottom panel cover 167 fixed with the bottom cover mounting screw 168 from the outside of the main body case. The projector 100 has the light source device 210 fixed to the bottom panel lid 167 by a unit fixing base 273 fixed to the bottom panel lid 167 by a base fixing screw 275.

  The light source device 210 is connected to a lamp connector 280 attached to the bottom panel 160 by a connector jack 287, and is connected to the lamp power supply circuit 261 via the lamp connector 280. The lamp connector 280 is a connector. It has a shaft 283 and can be turned up and down.

  The projector according to the present invention has a built-in microcomputer as a projector control means, and has a projection port 123 having a lens cover 121 on the front panel 120 of a case that is a substantially rectangular parallelepiped as shown in FIG. The top panel 110 of the case has keys and indicators such as a key as a power switch 111, an automatic image quality adjustment key 114, a manual image quality adjustment key 113, a power lamp indicator 112, a light source lamp indicator 115, and an overheat indicator 116. The rear panel is a projector 100 having various signal input terminals such as a power supply connector, a USB terminal connected to a personal computer, a video terminal for inputting an image signal, and a mini D-sub terminal.

  The upper lid 119 has subkeys for fine adjustment of image quality and image and various operation settings of the projector 100. An intake port is provided on the left side panel of the case and an exhaust port is provided on the right side panel 140. A port 145 is provided and has a cooling fan inside.

  In addition, the front panel 170 has a forefoot member 170 that can adjust the amount of protrusion at the front of the bottom panel, and a fixed rear foot member 175 at the rear left and right of the bottom panel. By changing the front height of the projector 100, it is possible to project an image according to the height of the screen.

  In the projector 100, as shown in FIG. 2, a light source device 210 incorporating a discharge lamp 211 such as an ultrahigh pressure mercury lamp, and a color wheel 222 and a light guide rod 224 as a light source side optical system 220, The light source side lens group 226 and one mirror 228 are provided.

  Further, a circuit board 269 to which a lamp power circuit 261 and a projector control means 267 are attached, and a display element 230 that emits light emitted from the light source device 210 by the light source side optical system 220, wherein a plurality of pixels are arranged in the row direction and column. Micromirror display element 230 that displays an image by controlling the reflection of incident light arranged in a matrix in the direction, and projection-side optics that projects light emitted from this display element 230 onto a projection surface such as a screen The projector 100 incorporates a fixed lens group 253 and a movable lens group 255 which are the system 250.

  The circuit board 269 is provided with projector control means 267 by a microcomputer. The control means 267 controls the operation of each circuit in the projector. When the power switch 111 is turned on, the light source device 210 is discharged. The lamp 211 is turned on, and the cooling fan 190 is driven at a rated speed according to the output of the discharge lamp 211 and the fan shape and arrangement of the cooling fan 190. The projector 100 is put into a standby state while the air inside the panel 140 is exhausted from the exhaust port 145.

When the temperature of the discharge lamp 211 rises to a predetermined temperature and the light emission is stabilized, an image can be projected by inputting an image signal.
In addition, when the power switch 111 is turned off, the discharge lamp 211 is turned off, and the cooling fan 190 is continuously driven for a predetermined time of about several minutes by a timer to cool down the inside of the projector 100 and perform all operations. Control such as stopping is also performed.

  The display element 230 is a display element 230 that does not include a means for coloring incident light such as a color filter. In this embodiment, a micromirror display element 230 (Digital Micromirror Device) generally abbreviated as DMD is used. ing.

  The micromirror display element 230 is configured to switch light incident from an incident direction inclined in one direction with respect to the front direction by switching the inclination direction of the plurality of micromirrors to a front-side on-state light beam and a diagonal off-state. The image is displayed by being reflected separately from the light beam, and the light incident on the micromirror tilted in one tilt direction is turned into the on-state light beam reflected in the front direction by this micromirror, and the other tilt direction The light incident on the micro mirror tilted in the direction is reflected by the micro mirror in an oblique direction to form an off-state light beam, and the off-state light beam is absorbed by the light-absorbing plate. The image is displayed by dark display by reflection in the direction.

  The light source device 210 includes a discharge lamp 211 inside, and an elliptical spherical reflector 213 whose inner surface is a reflection surface, and an explosion-proof surface is installed in front of the reflector 213 so as to close the opening in front of the reflector. The discharge lamp 211 is connected by a lead wire via a lamp connector 280 so that power can be supplied from the lamp power supply circuit 261. The discharge lamp 211 emits light and is reflected by the reflecting surface of the reflector 213, so that the light source device 210 Light is irradiated forward.

The light source side optical system 220 that makes the light emitted from the light source device 210 incident on the micromirror display element 230 includes a color wheel 222, a light guide rod 224, a light source side lens group 226 that is a plurality of lenses, and a mirror 228. It consists of.
The color wheel 222 has a color filter for sequentially coloring light emitted from the light source device 210 into three colors of red, green, and blue, and the light guide rod 224 is provided from the light source device 210. Is to make the intensity distribution of the emitted light uniform

  The color wheel 222 is a rotating plate in which fan-shaped three color filters of red, green, and blue are arranged in the circumferential direction, and the center thereof is arranged on the side of the optical path of the emitted light from the light source device 210. It is fixed to the rotating shaft of the color wheel rotating motor, and is arranged so that a part of the wheel circumferential direction is interposed in the optical path of the emitted light from the light source device 210.

The light guide rod 224 is disposed at a position where the incident surface faces the exit side of the color wheel 222, and guides the light incident from the incident surface while being reflected by the reflective film on the inner peripheral surface of the rod, and is uniform from the exit surface. The light is emitted as intensity distribution light.
The mirror 228 of the light source side optical system 220 reflects the light emitted from the light source device 210 and transmitted through the light guide rod 224, the color wheel 222, and the light source side lens group 226 toward the micromirror display element 230. Accordingly, light is projected onto the micromirror display element 230 from a direction inclined in one direction with respect to the front direction.

  The projection-side optical system 250 includes a fixed lens barrel that includes a fixed lens group 253, and a movable lens group 255 that is engaged with the fixed lens barrel and that can move forward and backward in the axial direction by a rotation operation. The projection-side optical system 250 includes a lens barrel and forms a zoom lens by a combination of a plurality of lenses incorporated in these lens barrels.

  As described above, the projector 100 emits light from the light source device 210 in one direction, and rotates the color wheel 222 of the light source side optical system 220 at a high speed, thereby entering the light source side optical system 220 from the light source device 210. The colored light is sequentially colored into three colors of red, green, and blue by the color wheel 222, the intensity distribution is made uniform by the light guide rod 224, and the micro mirror display element is formed by the lens 53 and the mirror as the light source side optical system 220. It can project toward 230.

  When the light from the light source device 210 is stabilized after a predetermined time has elapsed since the power was turned on, the monochromatic images of red, green, and blue are displayed on the micromirror display element 230 in synchronization with the projection cycle of red, green, and blue light. By sequentially writing the data, red, green and blue monochromatic images are sequentially formed on the micromirror display element 230 by the on-state light beam reflected in the front direction of the micromirror display element 230, and sequentially emitted from the micromirror display element 230. The red, green, and blue monochromatic image light is magnified by the lens groups 253 and 255 of the projection-side optical system 250 and projected onto the projection surface. The projection surface has three single colors of red, green, and blue. A full color image in which the images overlap is displayed.

  The light source device 210 of the projector 100 is, as shown in FIG. 3, provided with an explosion-proof case 215 in front of a reflector 213 containing a discharge lamp 211, and a flat explosion-proof glass 216 fixed thereto. The vicinity of the front end of the reflector 213 is fixed to a flat unit fixing base 273 by a unit fixing tool 271 that fixes and holds the reflector 213 from the periphery.

  In this unit fixing base 273, the light source device 210 is fixed to the upper surface by the unit fixing tool 271 and fixed to the bottom panel lid 167 from the upper surface side by the base fixing screws 275 arranged at the four corners. The bottom panel lid 167 is the bottom panel 160. A rigid plate-like body that constitutes a part of the bottom panel 160 and is fixed to the bottom panel 160 by a bottom cover mounting screw 168.

  As shown in FIG. 2, the bottom panel lid 167 has a rectangular shape slightly larger than the outer shape of the reflector 213 and the explosion-proof case 215 containing the discharge lamp 211. As shown in FIG. The bottom panel 160 is fixed to the bottom panel 160 by bottom cover mounting screws 168 positioned at the four corners from the outer surface of the bottom panel 160. When the bottom panel cover 167 is removed from the bottom panel 160, an opening through which the light source device 210 can be taken out Is formed.

Further, the projector 100 has an upper panel lid 117 having the same size as the bottom panel lid 167 at a position directly above the bottom panel lid 167.
The upper panel lid 117 constitutes a part of the upper panel 110, and is fixed to the upper panel 110 by upper lid mounting screws 118 positioned at the four corners from the upper surface side of the upper panel 110. When the panel 110 is removed from the panel 110, an opening having substantially the same size as the opening of the bottom panel 160 closed by the bottom panel lid 167 is opened in the top panel 110.

  The light source device 210 also has a connector jack 287 that is connected to the cathode and anode of the discharge lamp 211 by conducting wires, and a connector base 291 that supports the lamp connector 280 that receives the connector jack 287 is fixed to the bottom panel 160. It is what.

  The lamp connector 280 includes electrode pins 281 that are attached to the connector base 291 so as to be pivotable in the vertical direction by a connector shaft 283 parallel to the bottom panel 160, and electrically connect the connector jack 287, with the rear end being a connector. When the lamp connector 280 is parallel to the bottom panel 160 when the lamp connector 280 is parallel to the bottom panel 160, a notch 285 is provided on the rear end surface above and below the height of the connector shaft 283.

  The connector base 291 has a spring case 293 behind the lamp connector 280, and an elastic stopper 295 is mounted inside the spring case 293. The stopper 295 is shown in FIG. As described above, the center protrudes toward the lamp connector 280, and the tip of the protrusion is pressed against the rear end of the lamp connector 280.

  Therefore, when the lamp connector 280 is rotated about the connector shaft 283, the stopper 295 is provided with a notch 285 provided at the rear end of the lamp connector 280 as shown in FIG. And the rotation of the lamp connector 280 can be stopped at a position where the lamp connector 280 faces upward by a predetermined amount and a position where the lamp connector 280 faces downward by a predetermined amount.

  Thus, in the projector 100, the bottom panel lid 167 that forms an opening of a size that allows the light source device 210 to be taken out from the bottom panel 160 is screwed to the bottom panel 160 with the bottom lid mounting screw 168, and the bottom panel Since the unit fixing base 273 is attached to the lid 167 with the base fixing screw 275 and the light source device 210 is fixed to the unit fixing base 273, the light source device integrated with the bottom panel lid 167 is removed by removing the bottom lid mounting screw 168. 210 can be taken out from an opening provided in the bottom panel 160.

  In addition, since the upper panel lid 117 is provided on the upper panel 110 in the same manner as the bottom panel lid 167, the upper panel mounting screw 118 is removed and the upper panel lid 117 is removed from the upper panel 110, and then the base fixing screw 275 is removed. By removing the unit fixing base 273 from the bottom panel lid 167, the light source device 210 integrated with the unit fixing base 273 can be taken out from the opening formed in the top panel 110 of the projector 100.

  Since the bottom cover mounting screw 168 is screwed into the bottom panel 160 from the surface of the bottom panel cover 167, the light source device 210 is replaced when the projector 100 is placed on a table or the like. At this time, by turning the projector 100 upside down and removing the four bottom cover mounting screws 168 from which the head is visible, the light source device 210 can be removed together with the bottom panel cover 167 with an easy and simple operation. If the projector is suspended from the ceiling, remove the top cover mounting screw 118 visible on the surface of the top panel 110 facing the floor of the room from the bottom with the projector 100 suspended, and open the top panel 110. After that, the light source device 210 can be taken out together with the unit fixing base 273 by removing the base fixing screw 275.

  Further, since the lamp connector 280 can be rotated, the connector jack 287 can be easily removed and inserted by rotating the lamp connector 280 toward the bottom panel 160 when the bottom panel lid 167 is removed. When the upper panel cover 117 is removed, the connector jack 287 can be easily removed and inserted by rotating the lamp connector 280 toward the upper panel 110, and the light source device 210 can be removed from the upper and lower surfaces of the projector 100. It can be easily removed and installed.

  As described above, when the projector 100 is placed on a table or the like, the four screws are removed. When the projector 100 is fixed to the ceiling or the like, the four screws are removed and the opening is further opened in the top panel 110. By removing the four internal screws, the light source device 210 in the projector 100 can be taken out of the projector 100, and the light source device 210 can be easily replaced regardless of the state of the projector 100.

  By opening the top panel 110 and the bottom panel 160 in the same shape, making the upper panel lid 117 and the bottom panel lid 167 common, and fixing the unit fixing base 273 to the upper panel lid 117 The projector 100 may be hung from the ceiling, and may be a projector 100 that facilitates lamp replacement when placed on a table.

  The present invention is not limited to the embodiments described above, and can be freely changed and improved without departing from the gist of the invention.

FIG. 2 is a diagram illustrating an appearance of a projector according to the invention. FIG. 2 is a plan view showing an outline of the internal structure of the projector according to the invention. Sectional drawing which shows the attachment structure of the light source device of the projector which concerns on this invention. The schematic diagram which shows the motion of the lamp connector used for the projector which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Projector 110 Top panel 111 Power switch 112 Power lamp indicator 113 Manual image quality adjustment key 114 Automatic image quality adjustment key 115 Light source lamp indicator 116 Heating indicator 117 Upper panel lid 118 Upper lid mounting screw 119 Opening / closing lid 120 Front panel 121 Lens cover 123 Projection port 130 Rear panel 140 Right side panel 145 Exhaust port 150 Left side panel 155 Intake port 160 Bottom panel 167 Bottom panel lid 168 Bottom lid mounting screw 170 Front foot member 175 Rear foot member 190 Cooling fan 210 Light source device 211 Discharge lamp 213 Reflector 215 Explosion-proof case 216 Explosion-proof glass 220 Light source side optical system 222 Color wheel 224 Light guide rod 226 Light source side lens group 228 Mirror 230 Display element DESCRIPTION OF SYMBOLS 50 Projection side optical system 253 Fixed lens group 255 Movable lens group 261 Lamp power supply circuit 267 Projector control means 269 Circuit board 271 Unit fixture 273 Unit fixing base 275 Base fixing screw 280 Lamp connector 281 Electrode pin 283 Connector shaft 285 Notch 287 Connector jack 291 Connector base 293 Spring case 295 Stopper

Claims (4)

A projector including a light source device, a light source side optical system, a display element, a projection side optical system, a cooling fan, and a circuit board equipped with a lamp power circuit and projector control means in a main body case, the light source device being removed The first panel surface and the second panel surface of the main body case have possible openings, the first panel surface opening is closed with a first panel lid, and the second panel surface opening is closed with a second panel lid. The light source device is fixed to the second panel lid by a unit fixing base ,
The light source device is connected to the lamp power supply circuit at the front end, and the rear end includes a lamp connector that has a connector shaft and pivots up and down and is semicircular around the connector shaft.
When the lamp connector is parallel to the second panel surface, the first connector surface side and the second panel surface side have notches on the connector shaft of the rear end surface of the lamp connector . A projector characterized by that.   The first panel cover and the second panel cover are fixed to the first panel surface and the second panel surface, respectively, with mounting screws from the outside of the main body case, and the unit fixing base is connected to the first panel cover from the inside of the projector. The projector according to claim 1, wherein the projector is fixed to the panel cover of 2 with a fixing screw. The rear end side of the lamp connector has a stopper having a protruding portion protruding toward the rear end side of the lamp connector, and the stopper presses the protruding portion against the rear end of the lamp connector. The projector according to claim 1 or 2. 4. The projector according to claim 1, wherein the first panel surface is a top panel of the main body case, and the second panel surface is a bottom panel of the main body case.

Images