JP2008249955A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain high-efficiency heat radiation structure without providing a heat radiation fan and a Peltier element. <P>SOLUTION: A projector module 30 is integrated with a front cover 100A as a set of front cover parts in advance. In such a case, the heat radiation part 38b of a heat radiation block 38 is brought into contact with the back surface of an external cover (metallic cover) 100Ao through a hole provided on an internal cover 100Ai. Heat emitted from a light source 31 is transferred to the heat radiation part 38b from the heat transfer part 38a of the heat radiation block 38, and discharged to the outside through the external cover 100Ao made of metal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector apparatus provided with a projector module.

  In the projector device, heat generation of the light source (for example, high-brightness LED) cannot be ignored, and there is a concern about damage to the light source due to heat or an adverse effect on the image unless effective heat countermeasures are taken. For example, Patent Documents 1 and 2 describe a countermeasure against heat of the light source.

JP 2004-4581 A JP 2004-69825 A

  The heat countermeasures in Patent Documents 1 and 2 require the addition of a heat conductive heat dissipation member, a cooling Peltier element, etc., so the number of parts increases, and no effort has been made to efficiently release heat to the outside. , Heat dissipation is insufficient.

The present invention relates to a projector apparatus that includes a light source and an image forming member, forms an optical image for projection from image data, and projects the image to the outside. The outer cover of the projector apparatus is made of metal and the optical axis of the light source A substantially L-shaped metal block comprising a first portion extending in a substantially orthogonal direction and closely contacting the light source, and a second portion extending in a direction away from the light source in the optical axis direction of the light source; The second portion of the metal block is in close contact with the inner surface of the outer cover in order to release the heat of the light source to the outside of the apparatus.
You may position at least one part of another component in the space between the 1st, 2nd part of a metal block.
The metal block may be tightly fixed to the outer cover via a heat conductive member.
The light source, the image forming member, and the metal block may be integrated with the outer cover in advance as an outer cover set. In this case, a resin cover may be integrated inside the outer cover, and the projector module including at least the light source, the image forming member, and the metal block may be fixed to the resin cover.

  According to the present invention, a highly efficient heat dissipation structure can be realized without providing a heat dissipation fan, a Peltier element, or the like.

An embodiment when the present invention is applied to a projector built-in digital camera will be described with reference to FIGS.
FIG. 1 is a front view of the internal structure of a digital camera according to the present embodiment, FIG. 2 is a sectional view taken along line II-II, and FIG. 3 is a sectional view taken along line III-III. The camera body 100 has a substantially rectangular shape when viewed from the front, and a plurality of operation buttons 1 are provided on the upper surface thereof. Reference numerals 100A and 100B in FIG. 3 denote front / rear covers constituting the outer shell of the camera body 100. The front cover 100A includes a metal outer cover 100Ao and a resinous inner cover 100Ai fixed to the inner surface. Composed. The rear cover 100B is made of metal.

  Inside the camera body 100, the battery chamber 10 is disposed on the left side, and the camera unit 20 is disposed on the right side, and the projector module 30 is disposed therebetween. The battery chamber 10 is loaded with a power battery from the bottom of the camera, for example.

  The camera unit 20 includes a bending type imaging optical system 21, a lens barrier 22, an imaging unit 23, and the like. The photographing optical system 21 incorporates a plurality of lenses, a mirror which is a bending optical system, an optical image blur correction mechanism, and the like. The light flux from the subject enters the objective lens 21a exposed to the front of the camera body, is bent downward by the mirror, passes through the lens group, and then enters the imaging unit 23. Reference numeral 21b denotes an image blur correction unit incorporating an optical image blur correction mechanism.

  The lens barrier 22 can be rotated about the axis X by a barrier drive motor 22a (FIG. 2), and can take a protection position that covers the front surface of the objective lens 21a and a retreat position that retreats from the lens 21a. A control circuit (not shown) drives the lens barrier 22 from the protected position to the retracted position in response to the power switch being turned on, and drives the lens barrier 22 to the protected position in response to the power off.

  The imaging unit 23 is provided with an imaging element, an optical filter, and the like. The light beam that has passed through the photographic optical system 21 is received by the image sensor near the bottom of the camera and subjected to photoelectric conversion, and various processes are applied to the photoelectric conversion output to generate image data. The image data is recorded on a memory card loaded in the card slot 40.

Next, the projector module 30 will be described.
As shown in the enlarged view of FIG. 4, the projector module 30 includes a light source 31 such as a high-intensity LED, a condenser lens 32, a polarization beam splitter (hereinafter referred to as PBS) 33, and a reflective liquid crystal panel 34 such as LCOS. The projection lens 35, the mirror 36, and a case 37 for housing them. Note that a transmissive liquid crystal panel may be used.

  The light source 31 and the condensing lens 32 are disposed in the horizontal portion 30B that protrudes in the lateral direction from the location (bending portion 30A) where the PBS 33 is disposed, and the projection lens 35 and the mirror 36 protrude in the vertical direction from the bending portion 30A. Arranged in the vertical portion 30C. In the present embodiment, since the projector module 30 is arranged so that the horizontal portion 30B protrudes to the left in FIG. 1, the light source 31 that is a heat source can be as far away as possible from the imaging unit 23, and the influence of the thermal noise on the image can be reduced. It can be minimized.

  Reference numeral 38 denotes a metal (for example, aluminum) heat dissipation block integrated with the projector module 30 in advance, and the heat transfer portion 38a and the heat dissipation portion 38b form a substantially L shape (see FIG. 3). The heat transfer unit 38 a is closely fixed to the light source 31 in a state extending in a direction orthogonal to the optical axis of the light source 31, and the heat radiating unit 30 b extends in a direction away from the light source 31 in the optical axis direction of the light source 31.

  The projector module 30 is integrated with the front cover 100A in advance as a front cover set. In the present embodiment, a plurality of threaded projections PR are formed on the inner cover (resin cover) 100Ai of the front cover 100A, and the case 37 of the projector module 30 is fixed thereto with screws BS. At that time, the heat radiating portion 38b of the heat radiating block 38 is brought into close contact with the back surface of the outer cover (metal cover) 100Ao through a hole provided in the inner cover 100Ai. In the figure, the heat radiating portion 38b is tightly fixed to the outer cover 100Ao via a heat conductive double-sided adhesive tape TP. As described above, by assembling the projector module 30 to the front cover 100A in advance, the work of bringing the heat radiation part 38b into close contact with the outer cover 100Ao can be easily performed.

  Using the projector module 30 as described above, desired image data recorded on the memory card can be projected to the outside. The control circuit of the camera sends the image data to the liquid crystal panel 34 via the flexible printed board 39 and displays it. When the light source 31 is turned on in this state, the light source light passes through the condenser lens 32 and the PBS 33 and enters the reflective liquid crystal panel 34. The reflected light image is bent 90 degrees upward by the PBS 33, and the projection lens 35 and the mirror Projected to the front of the camera via 36.

  The heat generated from the light source 31 is transmitted from the heat transfer portion 38a of the heat dissipation block 38 to the heat dissipation portion 38b, and is released to the outside through the metal outer cover 100Ao. As can be seen from FIG. 3, the space between the heat transfer portion 38a and the heat radiating portion 38b while ensuring a sufficient contact area between the heat radiating portion 38b and the outer cover 100Ao by making the heat radiating block 38 L-shaped. Can interrupt a part of the battery chamber 10. Therefore, effective use of the camera internal space can be achieved without impairing the high heat dissipation efficiency.

  In the figure, 51 is a light emitting part of the flash device, 52 is a capacitor for storing charges for light emission, 53 is a tripod mount provided below the projector module 30, 54 is a terminal for connecting an external device, 55 is an image, etc. A liquid crystal monitor 56 for displaying images externally is a main board of the camera.

  Of the cover of the camera body, the location where the heat dissipation block is in close contact varies depending on the position of the projector module. For example, you may make it closely_contact | adhere to the back cover 100B. In addition, although an example in which a projector module is provided in a digital camera has been described above, the present invention is also applied to a camera-equipped mobile phone or other electronic device provided with a projector module, or a projector built-in device that does not have a photographing function. Applicable.

The figure which looked at the internal structure of the digital camera with a built-in projector in one Embodiment from the front. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG. The figure which expands and shows the principal part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Battery compartment 20 Camera unit 21 Image pick-up optical system 23 Imaging part 30 Projector module 31 Light source 33 Polarizing beam splitter 34 Reflective liquid crystal panel 35 Projection lens 38 Heat radiation block 38a Heat transfer part 38b Heat radiation part 40 Card slot 100 Camera main body 100A Front cover 100Ai Inner cover (resin cover)
100Ao outer cover (metal cover)
199B Rear cover

Claims (5)

In a projector apparatus having a light source and an image forming member, forming a projection light image from image data and projecting the image to the outside,
The outer cover of the projector device is made of metal,
Approximately composed of a first part extending in a direction substantially perpendicular to the optical axis of the light source and closely contacting the light source, and a second part extending in a direction away from the light source in the optical axis direction of the light source. A projector apparatus comprising an L-shaped metal block, wherein the second portion of the metal block is brought into close contact with an inner surface of the outer cover so as to release heat of the light source to the outside of the apparatus.   The projector device according to claim 1, wherein at least a part of another component is located in a space between the first and second portions of the metal block.   The projector apparatus according to claim 1, wherein the metal block is closely fixed to the outer cover via a thermally conductive member.   The projector according to claim 1, wherein the light source, the image forming member, and the metal block are integrated with the outer cover in advance as an outer cover set.   5. The projector module according to claim 4, wherein a resin cover is integrated inside the outer cover, and a projector module including at least the light source, the image forming member, and the metal block is fixed to the resin cover. Projector module.

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