JP4687990B2 - Light source device and projector - Google Patents

Description

  The present invention relates to a light source device and a projector using the light source device.

  2. Description of the Related Art Today, data projectors are widely used as image projection apparatuses that project a screen of a personal computer, a video image, an image based on image data stored in a memory card or the like onto a screen.

  This data projector incorporates a small high-intensity light source device such as a metal highland lamp or an ultra-high pressure mercury lamp, and condenses the light emitted from this light source on a micromirror display element called DMD or a liquid crystal plate. A color image is displayed on a screen.

  Such projectors have been downsized in recent years, but the cooling mechanism of the light source device that becomes high temperature is complicated, which hinders downsizing. Therefore, development of a projector using a light emitting diode that generates a relatively small amount of heat as compared with a high-pressure halogen lamp is urgently required.

  However, since the light emitting diode has a lower luminance than that of the high-pressure halogen lamp and there is no light-emitting diode having a luminance comparable to that of the high-intensity high-pressure halogen lamp, it is necessary to arrange a plurality of light-emitting diodes in the projector.

Therefore, many developments for arranging a plurality of light emitting diodes in a projector have been made. For example, in Japanese Patent Application Laid-Open No. 2004-220015 (Patent Document 1), a light source in which light emitting elements such as light emitting diodes are arranged in an array is used. Proposals have been made regarding the projectors used.
JP 2004-220015 A

  However, when such a plurality of light emitting diodes are arranged, it is difficult to equalize the light emitted from the plurality of bright spots, and the output colors of the red light emitting diode, blue light emitting diode, and green light emitting diode are difficult. Further, since the light emission energy of the color components is different, there is a problem that when white light is formed, light beams from a plurality of bright spots must be efficiently synthesized.

  The present invention has been made in view of the above-described problems of the prior art. When mounting a plurality of light emitting diodes, it is easy to mount many light emitting diodes, and a plurality of light emitting diodes are mounted. It is an object of the present invention to provide a light source device that can make a light beam from a point uniform and emit light close to parallel light, and a projector using the light source device.

  The light source device of the present invention includes a light source and a light source fixed in which a wedge-shaped light guide space is formed, a light source is provided in the vicinity of the wedge-shaped base plane, and an inclined plane intersecting the base plane is used as a light emission surface. And a light source main body portion that has a pyramid shape and receives light emitted from a light source fixture from a part of the side surface and reflects the light from the side surface to be emitted from the bottom surface.

  The wedge-shaped shape of the light guide space has a cylindrical curved surface intersecting with the base plane and the inclined plane, and the base plane has a semi-cylindrical wedge shape where the position of the base plane is thick and the distance from the base plane is thin. There may be a triangular prism-shaped wedge shape having two substantially parallel triangular side surfaces that intersect the plane and the inclined plane substantially perpendicularly and a rectangular main plane that obliquely intersects the base plane and the inclined plane.

The light source fixture has a reflective surface on the surface other than the base plane and the inclined plane, and the light source main body has a quadrangular pyramid shape and has four side surfaces as reflective surfaces. In addition to a hollow pyramid shape, it may be formed of solid optical glass or optical resin.
Furthermore, a plurality of light source fixtures are fixed by bringing an inclined flat surface as an emission surface into close contact with the side surface of the light source body.

  The light source device further includes a light source auxiliary member made of optical glass or optical resin having a prism shape or a truncated pyramid shape having the same shape as the bottom surface of the light source main body and having a refractive index smaller than that of the light source main body. In some cases, the auxiliary member and the central axis of the light source body portion are aligned, the light source body portion is closely attached to the inner surface of the light source auxiliary member, and a plurality of light source fixtures are provided on the outer surface of the light source auxiliary member. In some cases, the light source auxiliary member further includes a plurality of light sources on the surface facing the bottom surface of the light source body.

  Further, the light source device has a hollow cylindrical member having the same shape as the bottom surface of the light source main body, a prism or a truncated pyramid, and the cylindrical axis is aligned with the central axis of the light source main body. The light source body may be covered with the member, and a plurality of light source fixtures may be provided on the side surface of the cylindrical member. Further, a plurality of light sources may be further provided on the surface of the cylindrical member that faces the bottom surface of the light source body.

  The light source is a red light emitting diode, a green light emitting diode, or a blue light emitting diode, and the number of light emitting diodes of each color to be arranged is varied in accordance with the light emission energy of the color component of each of the red, green, and blue light emitting diodes. It is what.

  The projector of the present invention includes a light source device, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a projector control unit. The above-described one is used.

  According to the present invention, when mounting a plurality of light emitting diodes, it is easy to mount a large number of light emitting diodes, and light beams from a plurality of bright spots can be made uniform and emitted close to parallel light. A light source device and a projector using the light source device can be provided.

  The projector 100 according to the best mode for carrying out the present invention includes a light source device 210, a light source side optical system 220, a display element 229 that generates a projection image, a projection side optical system 252 that projects the projection image, and a projector. And a control means 181.

  The light source device 210 forms a triangular prism-shaped wedge-shaped light guide space, a light source fixing plate including a light source is disposed on a base plane that is one surface of the rectangle of the light guide space, and is a main surface that is one surface of another rectangle. A light source fixture 212 having a light emission surface that is an inclined flat surface that is a rectangular surface that has two surfaces, which are planes and side surfaces made of triangles, and a light emission surface of the light source fixture 212. The light source main body 213 that receives the light emitted from the inside of the pyramid from a part of the side surface of the pyramid and reflects the light from the side surface of the pyramid and emits it from the bottom surface.

The light source body 213 is made of solid optical glass or optical resin, and a plurality of light source fixtures 212 are fixed with their emission surfaces being in close contact with the side surfaces of the light source body 213.
The light sources are red, green, and blue light emitting diodes 211, and the number and position of the light emitting diodes 211 for each color are determined in accordance with the light emission energy of the color components.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The projector according to the present invention has a built-in microcomputer as a projector control means, and has a projection port 128 provided with a lens cover 121 on a front panel 120 of a case that is a substantially rectangular parallelepiped as shown in FIG. On the top panel 110 of the case are keys and indicators such as a power switch 111, a manual image quality adjustment key 113, an automatic image quality adjustment key 114, a power lamp indicator 112, a light source lamp indicator 115, an overheat indicator 116, and a speaker. It has a loudspeaker hole 118 and an opening / closing lid 119 arranged on the inside. On the back panel (not shown), various signal inputs such as a power supply connector, a USB terminal connected to a personal computer, a video terminal for inputting image signals, and a mini D-sub terminal A projector 100 having a 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 using a light emitting diode, a light source side lens group 226 such as a condensing mirror as a light source side optical system 220, and one reflection mirror. 228.

  Further, an image is displayed by controlling the reflection of incident light by arranging a plurality of pixels in a matrix in a row direction and a column direction, and a circuit board 180 on which a lamp power supply circuit 187 and a projector control means 181 are attached. The display element 229 is further incorporated with a fixed lens group 253 and a movable lens group 255 which are projection-side optical systems 252 for projecting light emitted from the display element 229 onto a projection surface such as a screen.

  The circuit board 180 is provided with projector control means 181 using a microcomputer. The control means 181 controls the operation of each circuit in the projector, and the light source device 210 is turned on when the power switch 111 is turned on. The light-emitting diode is turned on, and the cooling fan 190 is driven at a rated speed that matches the output of the light-emitting diode 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.

In addition, when the power switch 111 is turned off, the control of the cooling fan 190 is continued for a predetermined time of about several minutes by a timer to stop all operations after the inside of the projector 100 is cooled. It is.
The display element 229 does not include a means for coloring incident light like a color filter, and in this embodiment, a micromirror display element (Digital Micromirror Device) generally abbreviated as DMD is used. .

  The micromirror display element is configured to convert light incident from an incident direction inclined in one direction with respect to the front direction into an on-state light beam in a front direction and an off-state light beam in an oblique direction by switching the tilt directions of the plurality of micromirrors. The light is incident on the micromirror tilted in one tilt direction and turned into an on-state light beam reflected in the front direction by this micromirror, and tilted in the other tilt direction. The light incident on the micromirror is reflected off-axis by the micro-mirror 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 of the light.

3 and 4, the light source device 210 includes a light source fixture 212 having a wedge shape for fixing the light emitting diode 211 as a light source, and a pyramid shape to which a plurality of the light source fixtures 212 are fixed. The light source main body 213 is provided.
The light emitting diode 211 is composed of a red light emitting diode, a green light emitting diode, and a blue light emitting diode, which are the three primary colors of light, and emits light that is time-division controlled by the projector control means 181.

  Further, as shown in FIG. 5, the light source fixture 212 has a rectangular main plate 231 that is thick and has an inner surface as a reflecting surface, and rises vertically from both longitudinal sides of the main plate 231 and has a thick wall that reflects the inner surface. And two light source fixing plates 234 connected to the bottom sides of the two side walls 232 and one side of the main plate 231 and having a light-emitting diode 211 at the center. It has a hollow wedge shape with the oblique sides of the two side walls 232 as openings.

  Therefore, the light source fixture 212 forms a wedge-shaped base plane that becomes the base of the wedge with the light source fixing plate 234, and an inclined plane that intersects with the base plane is formed by the opening plane of the opening to form the exit surface, and the side wall 232 It is possible to form a wedge-shaped light guide space in which the inner surface of the main plate 231 is a side surface that intersects the base plane and the inclined plane substantially perpendicularly, and the inner surface of the main plate 231 is the main plane that intersects the base plane and the inclined plane obliquely. The number of light emitting diodes 211 attached to one light source fixture 212 is not limited to one as shown in FIG.

  The light source fixture 212 forms a triangular prism-shaped light guide space inside, and uses a rectangular inclined plane that is an opening as a light exit surface, and forms a rectangular base plane that intersects the exit surface. The plate 234 is provided with a light source, the opening surface is fixed in close contact with the light source main body 213, the light emitted from the light emitting diode 211 is reflected by the reflection surface, and the light is emitted from the opening surface into the light source main body 213. By emitting, most of the light emitted from the light emitting diode 211 can be emitted into the light source main body 213.

  The light source body 213 is a quadrangular pyramid and formed of solid optical glass or optical resin, and a plurality of light source fixtures 212 are affixed to the side surface to receive a plurality of light bundles incident from the side surface. In the light source main body 213, the light comes close to parallel light and is emitted to the outside from the exit surface on the bottom surface. The side surface of the light source body 213 is coated with a reflective film except for the mounting position of the light source fixture 212.

  In the light source device 210, as shown in FIG. 6, the light beam emitted from the light emitting diode 211 as the light source is reflected on the reflecting surface of the light source fixture 212, or the light emitted from the light emitting diode 211 as the light source is reflected. The light is directly emitted from the connection surface between the light source fixture 212 and the light source body 213 into the light source body 213.

  The light incident on the light source main body 213 at an acute angle with respect to the optical axis a is repeatedly reflected by the side surface inside the light source main body 213 and has a small angle with the optical axis a. Thus, the light is emitted from the bottom surface of the light source body 213 to the outside. At this time, the light incident from the emission surface of the light source fixture 212 attached to the distal end side of the light source main body 213 is repeatedly reflected on the side surface of the light source main body 213 so that the angle with the optical axis becomes small. Thus, the total reflection is performed on the side surface, and light can be effectively emitted from the bottom emission surface.

  The arrangement order and the number of the light emitting diodes 211 of each color are less than that of the other red and blue light components, so that green light is emitted on two of the four side surfaces of the light source body 213. The diodes are arranged, and the red and blue light emitting diodes are arranged one by one. In addition, it is possible to change the quantity at random, and it can be freely changed according to the use environment and purpose of the projector.

Further, the light source side lens group 226 of the light source side optical system 220 includes a condensing lens that condenses the light beam emitted from the light source device 210, an emission lens that emits light to the reflection mirror 228, and the like. Yes.
The reflection 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 source side lens group 226 toward the display element 229, thereby causing the display element 229 to face the front direction. The light is projected from a direction inclined in one direction.

  The projection-side optical system 252 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 rotating operation. The projection-side optical system 252 includes a lens barrel and forms a zoom lens by a combination of a plurality of lenses incorporated in these lens barrels.

  Then, the projector 100 according to the present embodiment is in an on state in which the monochrome image data of each color is sequentially written on the display element 229 in synchronization with the light projection period from the light source device 210 to reflect in the front direction of the display element 229. A single-color image of each color is sequentially formed on the display element 229 by light rays, and the single-color image light of each color sequentially emitted from the display element 229 is enlarged by the lens groups 253 and 255 of the projection-side optical system 252 and projected onto the projection surface In this case, a full-color image in which single-color images of respective colors are superimposed is displayed on the projection surface.

  According to the present embodiment, most of the light emitted from the light emitting diode 211 can be taken into the light source main body 213 by fixing the light emitting diode 211 to the light source main body 213 by the light source fixture 212. The utilization efficiency of the light emitted from is increased.

  Further, by making the light source body 213 a quadrangular pyramid shape, it becomes possible to emit a plurality of light bundles emitted from the light source body 213 close to parallel light, and in the light emitted from the light source device 210 The amount of light incident on the light source side optical system 220 disposed after the light source device 210 is increased, and the use efficiency of light emitted from the light source is increased by reducing wasted light.

  Further, since the light emitting diode 211 is arranged on the side surface of the light source main body 213, for example, as shown in FIG. 7, the light emitting diode 211 can be arranged on the entire side surface to increase the brightness of the projected image. Becomes easy.

  Furthermore, since the light emitting diode 211 is used as a light source, the temperature does not become high compared with a halogen lamp or the like used in a conventional projector, and the cooling mechanism becomes easy. In addition, by using the light emitting diodes 211 of the three primary colors red, green, and blue in time-sharing control, it is not necessary to arrange a color wheel that colors the light, so the projector can be easily downsized. .

  As shown in FIG. 8, the light source fixture 212 has a substantially rectangular and thin main plate 231 having an inner surface as a reflection surface, and a light source main body 213 rising vertically from both sides in the longitudinal direction of the main plate 231 and on the oblique side. A thin-walled side wall 232 having a flange portion 237 to be attached to the inner surface and having an inner surface as a reflection surface, and a light-emitting diode 211 connected to the bottom side of the two side walls 232 and one side of the main plate 231 in a thick rectangular shape at the center. And a light source fixing plate 234 having the same.

  The light source fixture 212 is formed with a triangular prism-shaped light guide space in the same manner as the light source fixture 212 described above, and has a rectangular light surface as an opening as a light exit surface. 212 is fixed to the light source main body 213 by forming the side wall 232 and the main plate 231 thick, but this light source fixing tool 212 is fixed to the light source main body 213 by the collar 237.

Further, as shown in FIG. 9, a base plane that is a predetermined incident surface and an inclined plane that is an exit surface are provided, and a light source fixing plate 234 is provided on the entrance surface, and the surfaces other than the entrance surface and the exit surface are reflective surfaces. It is also possible to use solid and triangular prism-shaped optical glass.
The light source fixture 212 is not limited to a triangular prism-shaped wedge-shaped light guide space obtained by obliquely cutting a prism, but may be a wedge-shaped light guide space obtained by obliquely cutting a cylinder.

  As shown in FIG. 10, the light source fixture 212 having a wedge-shaped light guide space having a curved surface has a shape obtained by obliquely cutting a part of a cylinder, and the inclined surface intersects the cylindrical curved surface and the cylindrical curved surface. A wedge-shaped cylindrical fixing portion 235 having a flat surface and a tip and a base, and a substantially semicircular light source fixing plate 234 fixed to the base of the cylindrical fixing portion 235, and a thick-walled cylindrical shape A substantially semicircular wedge-shaped space that is an internal space of the cylindrical fixing portion 235 is used as a light guide space with the inner surface of the fixing portion 235 as a reflection surface.

  The cylindrical fixing portion 235 is made of solid optical glass or optical resin, and the outer surface, which is a cylindrical curved surface, is used as a reflection surface, and the inclined plane intersecting the cylindrical curved surface is used as an emission surface. The entire interior of the fixing portion 235 may be a light guide space.

  Moreover, as the light source body 213, a quadrangular pyramid-shaped optical glass and an optical resin are used, but the shape of the bottom surface is rectangular, the angle formed by the four side surfaces with the bottom surface is constant, and the tip is a ridge shape. Things can also be used. In this way, by using a ridge-shaped tip, the angle formed between the optical axis and the side surface becomes equal, so that the diffusion of the light bundle that repeats reflection in the light source main body 213 can be suppressed, and the area of the side surface can be reduced. Since it becomes wide, the number of light source fixtures 212 to be arranged can be increased.

  Furthermore, the light source main body 213 is not limited to a pyramidal shape with a sharp tip as shown in FIG. 3, and has a linear ridge line parallel to the bottom surface of the light source main body 213 as described above. In the case of a pyramid shape, it may be a pyramid shape (pyramidal truncated cone shape) obtained by cutting the tip of the pyramid shape.

  The light source body 213 is not limited to a solid optical glass or the like, but is formed into a hollow quadrangular pyramid shape by combining a triangular reflecting plate or a triangular and trapezoidal reflecting plate whose inner surface is a reflecting surface. A light source fixture 212 may be attached to the outer surface of the light source body 213 formed of a reflective plate.

  In this embodiment, the light emitted from the light source device 210 is directly incident on the light source side optical system 220. However, the light guide rod is used as a light guide device between the light source device 210 and the light source side optical system 220. It is also possible to install a light tunnel. By using the light guide device in this way, the light flux incident on the light source side optical system 220 is made more uniform, so that unnecessary light is reduced in the subsequent display element 229 and the projection side optical system 252 and the use of light is reduced. Efficiency can be increased.

  Furthermore, a modification of the light source device 210 of the present invention will be described. As shown in FIGS. 11 and 12, the light source device 210 of this modification includes a light emitting diode 211, a light source fixture 212, and a light source body 213, and a light source auxiliary member 215. It is to be prepared.

  The light source auxiliary member 215 is a prism or truncated pyramid having the same shape as the bottom surface of the light source main body 213, and is formed of optical glass or optical resin having a refractive index smaller than that of the light source main body 213. The light source auxiliary member 215 has a central axis that coincides with the central axis of the light source, has a cavity having the same shape as the light source main body 213, and closely contacts the side surface of the light source main body 213 with the cavity surface. A plurality of light source fixtures 212 are fixed to the outer surface.

  In this embodiment, as shown in FIG. 13, the light incident on the light source auxiliary member 215 from the light source fixture 212 enters the light source main body 213 while being refracted at the boundary with the light source main body 213. The light beam incident on 213 has a large angle with the optical axis, and the light irradiated to the boundary exceeding the critical angle resulting from the difference in refractive index between the light source auxiliary member 215 and the light source main body 213 is again the light source auxiliary member 215. , Is reflected by the side surface of the light source auxiliary member 215 and enters the light source main body 213 again.

  Of the light bundles incident on the light source main body 213, those having a small angle with the optical axis a are repeatedly reflected in the light source main body 213 as they are, and exit to the outside from the exit surface while approaching parallel to the optical axis a. It is what is done.

  According to the light source device 210 of this modification, since the light emitting diode 211 is attached using the light source fixture 212, the utilization efficiency of the light beam emitted from the light emitting diode 211 is increased. Further, since the light source body 213 to which the light source fixture 212 is attached has become a rectangular parallelepiped light source auxiliary member 215, the area of the surface to which the light source fixture 212 is attached increases, and as shown in FIG. Can be arranged.

  A plurality of light emitting diodes 211 may be disposed on the surface of the light source auxiliary member 215 that faces the emission surface, that is, the surface of the light source auxiliary member 215 that faces the bottom surface of the light source body 213. Thereby, the shortage of light quantity can also be compensated.

  Further, although the light source auxiliary member 215 described above is formed using solid optical glass or optical resin, it is also possible to use a hollow cylindrical member 217 as shown in FIG. When the cylindrical member 217 is used in this way, the cylindrical member 217 is hollow, so that the vicinity of the emission surface is formed thick to fix the light source main body 213 as an adhesive portion 218, and the adhesive portion 218 is used as the cylindrical member 217. It is fixed by bonding to the inner surface.

Then, as shown in FIG. 16, the light source body 213 is fixed to the pyramid-shaped light source body 213 by supporting the front end of the light source body 213 with a support member 219 as shown in FIG. It may be fixed to the cylindrical member 217.
In addition, as shown in FIG. 17, the cylindrical member 217 may support the distal end portion of the light source main body 213 having a pyramidal shape as a truncated pyramid shape by a support member 219.

Even when the hollow cylindrical member 217 and the light source main body 213 are used in this way, as in the light source device 210 described above, it is possible to attach many light emitting diodes 211, and the light source main body 213 is a square pyramid. Therefore, the emitted light bundle can be made almost parallel to the optical axis.
Further, the support member 219 may be a transparent flat plate, and a light emitting diode may be attached to the rear surface of the support member 219 to increase the amount of light.

In the present embodiment and the modification, the light source main body 213 has a quadrangular pyramid shape in which the tip is sharp or ridged or cut to be a plane parallel to the bottom, but the tip is appropriately cut. However, it is not limited to a quadrangular pyramid such as a hexagonal pyramid or an octagonal pyramid.
The light source auxiliary member 215 and the cylindrical member 217 need only have a polygonal column shape or a polygonal frustum shape that matches the shape of the bottom surface of the light source main body 213.

The color wheel is eliminated by time-sharing control of the light emitting diodes, but the light emitted from the red, blue and green light emitting diodes is combined to generate white light, and the color wheel is used as in the past. It is also possible to emit colored light.
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.

1 is a perspective view of a projector according to an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified top view with the top surface of a projector according to an embodiment of the present invention removed. The perspective view of the light source device which concerns on the Example of this invention. The side view of the light source device which concerns on the Example of this invention. The perspective view of the light source fixture which concerns on the Example of this invention. The figure which shows the flow of the light beam of the light source device which concerns on the Example of this invention. The side view of the other light source device which concerns on the Example of this invention. The perspective view of the other light source fixture which concerns on the Example of this invention. The perspective view of the further another light source fixture which concerns on the Example of this invention. The perspective view of another light source fixture which concerns on the Example of this invention. The perspective view of the light source device which concerns on the modification of this invention. The side view of the light source device which concerns on the modification of this invention. The figure which shows the flow of the light beam of the light source device which concerns on the modification of this invention. The side view of the other light source device which concerns on the modification of this invention. The side view of another light source device which concerns on the modification of this invention. The side view of the other light source device which concerns on the modification of this invention. The side view of another light source device which concerns on the modification of this invention.

Explanation 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 Overheat indicator
118 Loudspeaker 119 Open / close lid
120 Front panel 121 Lens cover
128 Projection port 140 Right side panel
145 Exhaust port 150 Left side panel
155 Air intake 170 Forefoot member
175 Rear foot member 180 Circuit board
181 Projector control means 187 Lamp power circuit
190 Cooling fan 210 Light source device
211 Light emitting diode 212 Light source fixture
213 Light source body 215 Light source auxiliary member
217 Tube member
218 Bonding part 219 Support member
220 Light source side optical system 226 Light source side lens group
228 Reflective mirror 229 Display element
231 Main plate 232 Side wall
234 Light source fixing plate 235 Cylindrical fixing part
237 Collar 252 Projection side optical system
253 Fixed lens group 255 Movable lens group

Claims (20)

A light source;
A light source fixture that forms a wedge-shaped light guide space, includes the light source in the vicinity of the wedge-shaped base plane, and uses an inclined plane that is a plane in the wedge-shaped shape that intersects the base plane as a light exit surface; ,
A light source device having a pyramid shape and having a light source body that receives light emitted from the light source fixture from a part of a side surface and reflects the light from the side surface and emits the light from the bottom surface.   The light source fixture has a cylindrical curved surface intersecting with the base plane and the inclined plane, and a semi-cylindrical wedge-shaped light guide space in which the position of the base plane is thick and the distance from the base plane is thin. The light source device according to claim 1, wherein the light source device is formed.   The light source fixture is a wedge shape having a triangular prism shape having two side surfaces of a substantially parallel triangle that intersects the base plane and the inclined plane substantially perpendicularly and a rectangular main plane that obliquely intersects the base plane and the inclined plane. The light source device according to claim 1, wherein a light guide space is formed.   4. The light source fixture according to claim 1, wherein a surface of the light guide space other than the base plane and the inclined plane is a reflective surface, and the light source main body has a quadrangular pyramid shape. A light source device according to claim 1.   The light source device according to any one of claims 1 to 4, wherein the light source body is solid optical glass or optical resin.   6. The light source device according to claim 1, wherein a plurality of the light source fixtures are fixed in close contact with a side surface of the light source main body portion with an inclined plane as an emission surface.   A light source auxiliary member formed of optical glass or optical resin having a prism shape or a truncated pyramid shape having the same shape as the bottom surface of the light source main body portion and having a refractive index smaller than that of the light source main body portion; The light source main body part is brought into close contact with the inner surface of the light source auxiliary member, and a plurality of light source fixtures are provided on the outer surface of the light source auxiliary member. Light source device.   The light source device according to claim 7, further comprising a plurality of light sources on a surface of the light source auxiliary member that faces the bottom surface of the light source main body.   A hollow cylindrical member having a prism or truncated pyramid shape having the same shape as the bottom surface of the light source main body, and the light source main body by the cylindrical member with the central axis of the cylindrical member aligned with the central axis of the light source main body The light source device according to claim 5, further comprising a plurality of light source fixtures on a side surface of the cylindrical member.   The light source device according to claim 9, further comprising a plurality of light sources on a surface facing the bottom surface of the light source main body portion of the cylindrical member.   The light source is a red light emitting diode, a green light emitting diode, or a blue light emitting diode, wherein the number of light emitting diodes arranged according to the light emitting energy of each of the red, green, and blue light emitting diodes is different. The light source device according to claim 1. A light source device;
A light source side optical system;
A display element for generating a projection image;
A projection-side optical system that projects a projection image;
Projector control means,
The light source device
A light source;
A light source fixture that forms a wedge-shaped light guide space, includes the light source in the vicinity of the wedge-shaped base plane, and uses an inclined plane that is a plane in the wedge-shaped shape that intersects the base plane as a light exit surface; ,
A projector having a pyramid shape and having a light source main body that receives light emitted from the light source fixture from a part of the side surface and reflects the light from the side surface and emits the light from the bottom surface.   The projector according to claim 12, wherein the light source fixture has a light guide space surface other than a base plane and an inclined plane as a reflection surface, and the light source body has a quadrangular pyramid shape.   The projector according to claim 12, wherein the light source body is solid optical glass or optical resin.   The projector according to any one of claims 12 to 14, wherein a plurality of the light source fixtures are fixed with an inclined plane, which is an emission surface, in close contact with a side surface of the light source body.   The light source device includes a light source auxiliary member formed of optical glass or optical resin having a prism shape or a truncated pyramid shape that is the same shape as the bottom surface of the light source main body portion and having a refractive index smaller than that of the light source main body portion. A member and a central axis of the light source main body are aligned with each other, the light source main body is in close contact with the inner surface of the light source auxiliary member, and a plurality of light source fixtures are provided on the outer surface of the light source auxiliary member. The projector according to claim 14.   The projector according to claim 16, further comprising a plurality of light sources on a surface of the light source auxiliary member that faces the bottom surface of the light source main body.   The light source device includes a hollow cylindrical member having a prism shape or a truncated pyramid shape that is the same shape as the bottom surface of the light source main body, and the cylindrical member is aligned with the central axis of the light source main body. The projector according to claim 14, wherein the projector covers the light source main body and has a plurality of light source fixtures on a side surface of the cylindrical member.   The projector according to claim 18, further comprising a plurality of light sources on a surface of the cylindrical member facing the bottom surface of the light source main body. The light source is a red light emitting diode, a green light emitting diode, or a blue light emitting diode, wherein the number of light emitting diodes arranged according to the light emitting energy of each of the red, green, and blue light emitting diodes is different. Item 20. The projector according to any one of Items 12 to 19.

Images