JP5266993B2 - Projector unit and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector unit and electronic equipment, which can suppress rotation and backlash of a polarized light-changing element and a polarizing beam splitter. <P>SOLUTION: The projector unit includes: the polarized light-changing element 34 which makes the polarized light components of light emitted from a light source 52 uniform; the polarizing beam splitter 36 which is arranged adjacent to the polarized light-changing element, and splits light incident through the polarized light-changing element to light of the first polarized light component and light of the second polarized light component; a display part 38 on which a projection image to be read out by light of either polarized light component split by the polarizing beam splitter is displayed; a housing 32 in which the light source, the polarized light-changing element, the polarizing beam splitter and the display part are housed; and an biasing member 44 which is arranged in contact with the inner wall surface of the housing at a position of the polarizing beam splitter on an opposite side to the polarized light-changing element and biases the polarized light-changing element and the polarizing beam splitter to the inner wall surface of the housing that holds the polarized light-changing element on the light source side. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a projector unit and an electronic apparatus including the projector unit.

An electronic device including a projector unit is known (for example, see Patent Document 1). In such an electronic device, by using the projector function, a large number of people can enjoy a photographed image at the same time, and by storing the projector unit and the photographing unit in a small space, it is small and excellent in portability. can do.
JP 2005-250392 A

  However, in such an electronic device, in order to prevent the occurrence of image blurring, a member that suppresses rotation and rattling of each component of the projector unit is required. However, in a small electronic device, rotation and rattling are required. It was difficult to arrange a member that suppresses each part.

  An object of the present invention is to provide a projector unit and an electronic apparatus capable of suppressing rotation and backlash of a polarization conversion element and a polarization beam splitter.

  The projector unit of the present invention includes a polarization conversion element that aligns polarization components of light emitted from a light source, and a light beam that is disposed adjacent to the polarization conversion element and that is incident through the polarization conversion element as a first polarization component. A polarization beam splitter that separates the light into the second polarization component light, a display unit that displays a projection image read by the light of one polarization component separated by the polarization beam splitter, the light source, and the polarization A housing housing the conversion element, the polarization beam splitter, and the display unit; and being disposed in contact with the inner wall surface of the housing at a position opposite to the polarization conversion element of the polarization beam splitter; A biasing member that biases the polarization conversion element and the polarization beam splitter against an inner wall surface of the housing that holds the polarization conversion element on the side; And features.

  An electronic apparatus according to the present invention includes the projector unit according to the present invention.

  According to the projector unit and the electronic apparatus of the present invention, rotation and backlash of the polarization conversion element and the polarization beam splitter that constitute the projector unit can be suppressed.

  A camera (electronic device) according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a camera according to an embodiment. The camera 2 includes a front cover 4 and a back cover 6 made of metal such as aluminum sheet metal. The front cover 4 is provided with a photographing window 8, a projector projection window 10, and a flash window 12 through which flash light is emitted. ing. Further, on the upper part of the camera 2, a power switch 14, a shutter button 16 for instructing a release operation, a mode switching button 18 for switching between a shooting mode for performing camera shooting and a projector mode for performing projector projection, and a projection image at the time of projector projection A projector focus lever 20 or the like that is an operation lever for performing focus adjustment is provided.

  FIG. 2 is a diagram illustrating the configuration of the back surface of the camera according to the embodiment. The back cover 6 of the camera 2 is provided with an operation unit 24 that includes an LCD display unit 22 that displays and plays back captured images, a multi-selector that selects shooting conditions displayed on the LCD display unit 22, and the like. . In the present embodiment, the front cover 4 and the back cover 6 made of metal are used, but a front cover and a back cover made of plastic may be used.

  FIG. 3 is a front view showing the arrangement of each unit housed in the camera according to the embodiment. Inside the camera 2, a lens barrel unit 26 having an image sensor for imaging subject light, a projector unit 28 having an optical system for projecting a projection optical image, a lens barrel unit 30, and a projector unit 28. And a battery chamber 30 that houses a battery that supplies electric power to the battery.

  FIG. 4 is a perspective view of the projector unit according to the embodiment as viewed from the back side of the camera, and FIG. 5 is a cross-sectional view illustrating the configuration of the projector unit according to the embodiment. As shown in FIG. 4, the projector unit 28 includes a housing 32, and an upper portion of the housing 32 is projected from the projection lens 40 that moves in the vertical direction in FIG. A mirror 48 for deflecting the projection direction of the optical image is provided. In the lower part of the housing 32, an LED (light emitting diode) 52 that is a light source, a condensing lens 54 for making light emitted from the LED 52 substantially parallel, and a polarization direction of incident light are aligned to a constant polarization direction. The incident light disposed adjacent to the polarization conversion element 34 and the polarization conversion element 34 is separated into P-polarization component light and S-polarization component light, transmits P-polarization component light, and reflects S-polarization component light. A polarization beam splitter 36 and an LCOS 38 having a polarization separation unit are provided. An LED heat radiation surface 58 is provided on the back surface of the light emission surface of the LED 52. In addition, a space 46 into which the urging member 44 can be inserted is provided in the casing 32 where the surface opposite to the surface in contact with the polarization conversion element 34 of the polarization beam splitter 36 is in contact. Yes. Here, the urging member 44 is a leaf spring made of a material having excellent elasticity such as a metal such as copper or a resin, and has a bow shape. 4 and 5 show the wiring 50 for transmitting an image to be displayed on the LCOS 38. FIG.

  In the projector unit 28, the light emitted from the LED 52 is converted into substantially parallel light by the condenser lens 54, and the light that has been converted into substantially parallel light is aligned by the polarization conversion element 34 to light of a certain polarization component. In the present embodiment, the light having the S polarization component aligned by the polarization conversion element 34 is incident on the polarization beam splitter 36. The S-polarized component light incident on the polarization beam splitter 36 is reflected downward in FIG. 5 and enters the LCOS 38. Here, a liquid crystal layer (not shown) constituting the LCOS 38 functions as a phase plate for incident light when a voltage is applied. Accordingly, among the light emitted from the LCOS 38, the light that has passed through the pixel region to which the voltage is applied by the liquid crystal layer is converted from the light of the S polarization component to the light of the P polarization component, and the liquid crystal out of the light emitted from the LCOS 38 Light that has passed through a pixel region to which no voltage is applied by the layer travels as light of an S-polarized component.

  Of the light re-entering the polarization beam splitter 36 as the mixed light of the S-polarized component and the P-polarized component, only the P-polarized component light is transmitted through the polarization separation unit, and the transmitted P-polarized component light is the projection lens 40 and the mirror. Projected from the projector projection window 10 to the front of the camera 2 via 48. That is, the image displayed on the LCOS 38 is read out as a projection optical image and projected in the forward direction of the camera 2.

  FIG. 6 is a cross-sectional view (A-A cross-sectional view of FIG. 5) showing the projector unit housed in the camera according to the embodiment. When the urging member 44 is inserted into the space 46 of the projector unit 28 in the direction indicated by the arrow in FIG. 4, the urging member 44 is connected to the polarization conversion element 34 of the polarization beam splitter 36 as shown in FIG. Are arranged so as to be in contact with the inner wall surface of the housing 32 at the opposite side position. At this time, the urging member 44 is in close contact with the inner wall surface of the housing 32 at two locations near both ends and the polarizing beam splitter 36 at the arc-shaped arc portion. The polarization beam splitter 36 is disposed adjacent to the polarization conversion element 34, and the polarization conversion element 34 is held on the inner wall surface of the housing 32 bent at a substantially right angle on the LED 52 side. Therefore, the urging force of the urging member 44 is applied to the inner wall surfaces 60 and 62 (see FIG. 5) of the housing 32 that holds the polarization conversion element 34 on the LED 52 side via the polarization beam splitter 36 and the polarization conversion element 34. In addition, the polarization conversion element 34 and the polarization beam splitter 36 are fixed with respect to the horizontal direction in FIG. 5 by the biasing force of the biasing member 44. Further, in the vertical direction, as shown in FIG. 5, the polarization conversion element 34 is fixed by being held by the housing 32, and the polarization beam splitter 36 is a projection 64, 66, 68 on the inner wall surface of the housing 32. , 70. Here, the distance between the protrusion 64 and the protrusion 68 and the distance between the protrusion 66 and the protrusion 70 are substantially equal to the vertical length of the polarizing beam splitter 36 in FIG. The distance between the projection 66 and the projection 70 is a length that can accommodate the polarization beam splitter 36.

  According to the camera of the present embodiment, rotation and backlash of the polarization conversion element and the polarization beam splitter constituting the projector unit can be suppressed.

  In the present embodiment, the polarization conversion element 34 aligns the polarization component of the incident light with the light of the S polarization component, and the polarization beam splitter 36 transmits the light of the P polarization component and reflects the light of the S polarization component. However, the polarization conversion element 34 may be configured so that the polarization component of the incident light is aligned with the light of the P polarization component, and the polarization beam splitter 36 transmits the light of the S polarization component and reflects the light of the P polarization component. .

  In this embodiment mode, a structure using LCOS which is a reflective liquid crystal element as a display portion has been described as an example. In this case, a transmissive liquid crystal element 72 is disposed between the polarizing beam splitter 36 and the projection lens 40 as shown in FIG. 7, and the polarizing beam splitter 36 exits downward on the lower surface of the polarizing beam splitter 36 in FIG. A mirror 74 that reflects the reflected light is provided. When the urging member 44 is inserted into the space 46, the polarization conversion element 34 and the polarization beam splitter 36 are fixed by the urging force of the urging member 44 as in the above-described embodiment.

It is a perspective view which shows the external appearance of the camera which concerns on embodiment of this invention. It is a figure which shows the structure of the back surface of the camera which concerns on embodiment of this invention. It is a front view which shows arrangement | positioning of each unit accommodated in the camera inside which concerns on embodiment of this invention. It is the perspective view which looked at the projector unit which concerns on embodiment of this invention from the back side of the camera. It is sectional drawing which shows the structure of the projector unit which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the projector unit which concerns on embodiment of this invention. It is a figure which shows the other structure of the projector unit which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Camera, 4 ... Front cover, 6 ... Back cover, 10 ... Projector projection window, 26 ... Lens barrel unit, 28 ... Projector unit, 32 ... Case, 34 ... Polarization conversion element, 36 ... Polarization beam splitter, 38 ... LCOS, 44 ... biasing member, 52 ... LED.

Claims (4)

A polarization conversion element that aligns the polarization components of the light emitted from the light source;
A polarization beam splitter that is arranged adjacent to the polarization conversion element and separates light incident through the polarization conversion element into light of a first polarization component and light of a second polarization component;
A display unit for displaying a projection image read by the light of one polarization component separated by the polarization beam splitter;
A housing that houses the light source, the polarization conversion element, the polarization beam splitter, and the display unit;
With respect to the inner wall surface of the casing that is disposed in contact with the inner wall surface of the casing at a position opposite to the polarization conversion element of the polarization beam splitter and holds the polarization conversion element on the light source side A projector unit comprising: an urging member that urges the polarization conversion element and the polarization beam splitter.   The projector unit according to claim 1, wherein the biasing member is a leaf spring.   The projector unit according to claim 1, wherein the urging member is made of a material having excellent elasticity. An electronic apparatus comprising: a projector unit according to any one of claims 1-3.

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