WO2010007747A1 - 電子ビューファインダ装置、撮像装置 - Google Patents
電子ビューファインダ装置、撮像装置 Download PDFInfo
- Publication number
- WO2010007747A1 WO2010007747A1 PCT/JP2009/003207 JP2009003207W WO2010007747A1 WO 2010007747 A1 WO2010007747 A1 WO 2010007747A1 JP 2009003207 W JP2009003207 W JP 2009003207W WO 2010007747 A1 WO2010007747 A1 WO 2010007747A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- liquid crystal
- optical system
- light
- transmission
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/02—Viewfinders
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
Definitions
- the present invention relates to an electronic viewfinder device including a reflective liquid crystal display, and an imaging device.
- Patent Document 1 discloses an electronic viewfinder device that uses reflective liquid crystal.
- This electronic view funder includes a reflection type display means, an illumination means for illuminating the display means, and an optical path dividing means for reflecting a light beam from the illumination means to guide the display means and passing reflected light from the display means And an eyepiece optical system that guides the light flux from the display means that has passed through the optical path dividing means to the pupil of the observer.
- a cover member (transmission plate) is generally provided at the eyepiece portion.
- the cover member is provided so as to be perpendicular to the optical axis of the finder optical system.
- FIG. 12 is a schematic diagram showing a light path of the electronic view funder.
- the electronic viewfinder 3 includes a reflective liquid crystal display 31, a finder optical system 32, and a transmission plate 34.
- the reflective liquid crystal display 31 includes a light source 311, a diffusion plate 312, a first polarizing plate 313, a second polarizing plate 314, a liquid crystal 315, and a reflective plate 316.
- the second polarizing plate 314 is arranged so that the first polarizing plate 313 and the polarization axis of light are orthogonal to each other.
- the liquid crystal 315 is formed to be twisted and arranged in a state where no voltage is applied.
- Natural light emitted from the light source 311 is diffused by the diffusion plate 312. Natural light diffused by the diffusion plate 312 is transmitted only by linearly polarized light by the first polarizing plate 313. The linearly polarized light transmitted by the first polarizing plate 313 is reflected by the second polarizing plate 314. When the linearly polarized light reflected by the second polarizing plate 314 passes through the liquid crystal 315 to which no voltage is applied, the polarization axis is twisted (turned) by 45 degrees. The linearly polarized light whose polarization axis is twisted 45 degrees is reflected by the reflecting plate 316.
- linearly polarized light reflected by the reflecting plate 316 passes through the liquid crystal 315 again, the polarization axis is twisted 45 degrees.
- the polarization axis of the linearly polarized light reflected through the liquid crystal 315 to which no voltage is applied is twisted by 90 degrees.
- linearly polarized light whose polarization axis is twisted by 90 degrees passes through the second polarizing plate 314 and is output as an optical image signal from the reflective liquid crystal display 31. .
- FIG. 13 shows an example of the path of light output from the upper end of the liquid crystal 315.
- the light output from the reflective liquid crystal display 31 is refracted by the finder optical system 32 and enters the transmission plate 34.
- the transmission plate 34 a part of the incident light is transmitted and the remaining part is reflected by the transmission surface 341.
- the light reflected by the transmission surface 341 of the transmission plate 34 enters the reflective liquid crystal display 31 through the finder optical system 32. Since the light incident on the reflective liquid crystal display 31 is internal polarization having a polarization axis that passes through the second polarizing plate 314, the light passes through the second polarizing plate 314 and enters the surface of the liquid crystal 315.
- the light incident on the surface of the liquid crystal 315 is transmitted through the polarization axis as it is and reflected by the reflecting plate 316. For this reason, the light reflected by the reflecting plate 316 passes through the second polarizing plate 314 again. For this reason, the light that has passed through the second polarizing plate 314 enters the transmission plate 34 via the finder optical system 32. As a result, when the light incident on the transmission plate 34 is transmitted and reflected on the eyes of the user, it appears as a ghost or flare.
- the light reflected by the transmission surface 341 of the transmission plate 34 and passed through the finder optical system 32 is partially reflected by the surface of the second polarizing plate 314 on the finder optical system 32 side, as indicated by a virtual line, The light may enter the transmission plate 34 again through the finder optical system 32.
- the light incident on the transmission plate 34 is transmitted and reflected on the eyes of the user, it appears as a ghost or flare.
- the present invention has been made to solve the above-described problems, and in an electronic viewfinder provided with a reflective liquid crystal display, it is possible to reduce the occurrence of ghost or stray light caused by reflection on the transmission surface of the transmission plate.
- An object is to provide an electronic viewfinder.
- An electronic viewfinder device includes a reflective liquid crystal display that outputs an optical image signal, a finder optical system that collects an optical image signal output from the reflective liquid crystal display, and a light that is collected by the finder optical system.
- a transmission plate that transmits a part of the optical image signal and reflects at least a part of the remaining optical image signal.
- the reflective liquid crystal display includes a light source that emits light, a liquid crystal plate that is disposed on the optical axis of the finder optical system so that the surface is perpendicular to the optical axis, and the finder optical system on the back side of the liquid crystal plate.
- a reflecting plate is arranged on the optical axis of the system so that the reflecting surface is perpendicular to the optical axis, and reflects the light incident from the light source via the liquid crystal plate, and is perpendicular to the optical axis of the finder optical system.
- the light is radiated from the light source and reflected to the reflecting plate side, and the light passing through the liquid crystal plate and reflected by the reflecting plate is transmitted to the viewfinder optical system side as an optical image signal.
- a polarizing plate, and the transmission plate is disposed so as to be inclined in a direction opposite to the inclination direction of the polarizing plate so that a transmission surface is not perpendicular to the optical axis of the finder optical system.
- the present invention is an imaging device provided with an electronic viewfinder device.
- the electronic viewfinder device of this imaging apparatus includes a reflective liquid crystal display that outputs an optical image signal, a finder optical system that condenses the optical image signal output from the reflective liquid crystal display, and a light that is collected by the finder optical system.
- a transmission plate that transmits a part of the optical image signal and reflects at least a part of the remaining optical image signal.
- the reflective liquid crystal display includes a light source that emits light, a liquid crystal plate that is disposed on the optical axis of the finder optical system so that the surface is perpendicular to the optical axis, and the finder optical system on the back side of the liquid crystal plate.
- a reflecting plate is arranged on the optical axis of the system so that the reflecting surface is perpendicular to the optical axis, and reflects the light incident from the light source via the liquid crystal plate, and is perpendicular to the optical axis of the finder optical system.
- the light is radiated from the light source and reflected to the reflecting plate side, and the light passing through the liquid crystal plate and reflected by the reflecting plate is transmitted to the viewfinder optical system side as an optical image signal.
- a polarizing plate, and the transmission plate is disposed so as to be inclined in a direction opposite to the inclination direction of the polarizing plate so that a transmission surface is not perpendicular to the optical axis of the finder optical system.
- the transmission surface of the transmission plate is disposed so as not to be perpendicular to the optical axis of the finder optical system. Therefore, it is possible to reduce the incidence of the optical image signal reflected by the transmission surface on the reflection plate through the finder optical system. Therefore, it is possible to reduce the occurrence of ghost or stray light in an electronic viewfinder device provided with a reflective liquid crystal display.
- the transmission plate is disposed so as to be inclined in the direction opposite to the inclination direction of the polarizing plate.
- the polarizing plate is disposed so as to be inclined in the direction opposite to the inclination direction of the transmission plate. Therefore, even when the optical image signal reflected by the transmission surface enters the polarizing plate through the finder optical system, it is possible to reduce the incident light beam from returning to the transmission plate through the finder optical system. Thereby, in the electronic viewfinder device provided with the reflective liquid crystal display, the generation of ghost or stray light can be further reduced.
- summary of the structural example of the camera system which concerns on embodiment of this invention The perspective view of the camera body which removed the upper member of the exterior case which concerns on embodiment of this invention
- the perspective view of the electronic viewfinder which concerns on embodiment of this invention 1 is an exploded perspective view of an electronic viewfinder according to an embodiment of the present invention. Schematic diagram for explaining the AA cross section of the electronic viewfinder of FIG.
- the camera system 1 includes a camera body 2 and an interchangeable lens 9 that can be attached to and detached from the camera body 2.
- the camera body 2 includes an electronic viewfinder 3, a CMOS image sensor 4, an image processing unit 5, a controller 6, a card slot 7, and a power supply box 8. Thereby, the camera body 2 can display the image data captured and generated by the CMOS image sensor 4 on the electronic viewfinder 3.
- the camera body 2 can also display image data stored in the memory card X inserted into the card slot 7 on the electronic viewfinder 3.
- the CMOS image sensor 4 converts the optical signal collected by the interchangeable lens 9 into image data.
- the image processing unit 5 performs predetermined image processing on the image data converted by the CMOS image sensor 4. Examples of the predetermined image processing include YC conversion, electronic zoom processing, compression processing, and the like, but are not limited thereto.
- the image processing unit 5 outputs the image data subjected to the image processing to the electronic viewfinder 3. Thereby, the image data captured and generated by the CMOS image sensor 4 can be displayed on the electronic viewfinder 3.
- the controller 6 reads out the image data stored in the memory card X inserted in the card slot 7 and outputs it to the electronic viewfinder 3. Thereby, the image data stored in the memory card X can be displayed on the electronic viewfinder 3.
- FIG. 2 is a perspective view of the camera body
- FIG. 3 is a perspective view showing a state in which an upper member of the exterior case of the camera body is removed
- FIG. 4 is a perspective view of the electronic viewfinder.
- the electronic viewfinder 3 is screwed to the chassis provided on the lower member of the outer case of the camera body 2 with screws, with the upper member of the outer case of the camera body 2 removed.
- the electronic viewfinder 3 is connected to a board on which the image processing unit 5 and the controller 6 are provided by a flexible wiring board 36.
- the flexible wiring board 36 has a signal line for image data and a signal line for power supply.
- the electronic viewfinder 3 can accept image data output from the image processing unit 5 or the controller 6. Further, the electronic viewfinder 3 receives power supply from a battery provided in the power supply box 8.
- the electronic viewfinder 3 includes a reflective liquid crystal display 31, a finder optical system 32, a diopter adjustment mechanism 33, a transmission plate 34, a finder unit housing 35, and flexible wiring.
- a substrate 36 and a back case 37 are provided.
- the reflective liquid crystal display 31 can output image data received from the image processing unit 5 or the controller 6 as an optical image signal.
- the reflective liquid crystal display 31 includes a light source 311, a diffusion plate 312, a first polarizing plate 313, a second polarizing plate 314, a liquid crystal 315, a reflecting plate 316, and an antireflection mask 317. And a liquid crystal driver 318.
- the second polarizing plate 314, the liquid crystal 315, the reflection plate 316, the antireflection mask 317, the liquid crystal driver 318, and the transmission plate 34 are disposed on the optical axis of the finder optical system 32. The operation when the reflective liquid crystal display 31 outputs image data as an optical image signal is as described in the problem section.
- each part of the reflective liquid crystal display 31 can be realized as follows.
- the light source 311 can be realized by a three-color LED light source.
- the light source 311 is disposed on the side of the optical axis of the finder optical system 32.
- the diffusion plate 312 can be realized by a diffusion sheet.
- the first polarizing plate 313 and the second polarizing plate 314 can be realized by a PBS (polarizing beam splitter).
- the reflector 316 can be realized by a silicon wafer.
- the antireflection mask 317 is a member that can prevent reflection.
- the antireflection mask 317 is provided with a non-reflective coating so that light can be absorbed.
- As the paint for example, an epoxy black paint or an acrylic black paint can be used.
- the liquid crystal driver 318 is a substrate that has a connector connected to the flexible wiring board 36 on the back surface and drives the reflective liquid crystal display 31.
- the back case 37 is configured to be able to engage with the finder unit casing 35 in a state where the flexible wiring board 36 is connected to the connector.
- the finder optical system 32 includes three lenses.
- the finder optical system 32 condenses the optical image signal output from the reflective liquid crystal display 31.
- FIG. 6 is a schematic diagram for explaining an AA cross section of the electronic viewfinder 3 of FIG. FIG. 6 shows the orientation when the electronic viewfinder 3 is attached to the camera system 1, and the vertical direction and the upper side in FIG. 6 correspond to the vertical direction and the upper side of the camera system 1.
- the finder optical system 32 is supported by the finder unit housing 35 so as to be movable along the optical axis direction between the near vision side position and the far vision side position.
- the finder optical system 32 is moved by the diopter adjustment mechanism 33.
- the diopter adjustment mechanism 33 is realized by mechanical members (knob 331 and gear 332). The user can move the position of the finder optical system 32 by operating the knob 331 so that the optical image signal from the reflective liquid crystal display 31 can be easily seen.
- the transmission plate 34 is made of glass or plastic and is attached to the finder unit casing 35.
- the transmission plate 34 is a plane parallel plate. That is, the transmission plate 34 has two parallel planes. One plane is the transmission surface 341.
- the transmission plate 34 is configured to have two parallel planes. Since it comprised in this way, the light which permeate
- the transmission plate 34 transmits a part of the optical image signal collected by the finder optical system 32.
- the remaining part of the optical image signal is reflected by the transmission surface 341.
- the transmission plate 34 has a transmission surface 341 with respect to the optical axis of the finder optical system 32 so that the optical image signal reflected by the transmission surface does not enter the reflection plate 316 of the reflective liquid crystal display 31 via the finder optical system 32. Inclined so as not to be vertical.
- the second polarizing plate 314 is disposed so as to be inclined such that its lower end is closer to the finder optical system 32 in the optical axis direction than its upper end,
- the transmission surface 341 is inclined at a predetermined angle about the horizontal direction of the transmission surface 341 so that the lower end of the transmission surface 341 is closer to the viewfinder optical system 32 in the optical axis direction than the upper end.
- the transmission plate 34 is disposed so as to be inclined in a direction opposite to the inclination direction of the second polarizing plate 314 so that the transmission surface 341 thereof is not perpendicular to the optical axis of the finder optical system 32.
- the transmission plate 34 has a transmission surface 341 that is not perpendicular to the optical axis of the finder optical system 32, and the transmission surface 341 is the tilt direction of the second polarizing plate 314. Inclined in the opposite direction. In this way, since the transmission surface 341 is not perpendicular to the optical axis of the finder optical system 32, the optical image signal reflected by the transmission surface 341 enters the reflection plate 316 via the finder optical system 32. Can be reduced. Further, since the transmission surface 341 is inclined in the direction opposite to the inclination direction of the second polarizing plate 314, the light reflected by the transmission surface 341 enters the second polarizing plate 314, and the incident light is incident on the second polarizing plate. It can be reduced that the light is reflected at 314 and is incident on the transmission plate 34 again.
- the transmission plate 341 has its transmission surface 341 inclined in the opposite direction, not in the same direction as the inclination direction of the second polarizing plate 341.
- the optical image signal from the reflective liquid crystal display 31 is partially reflected by the transmission surface 341 of the transmission plate 34, and a part of the reflected light is reflected by the second polarizing plate 314, resulting in a ghost. And it can reduce the occurrence of stray light.
- the predetermined angle described above is set such that the light reflected by the transmission plate 34 does not enter the reflection plate 316 when the finder optical system 32 is moved to the near vision side.
- an example of a procedure for adjusting the predetermined angle of the transmission plate 34 will be described with reference to FIG.
- the lower end of the transmission plate 34 When the lower end of the transmission plate 34 is tilted so as to approach the finder optical system 32 as in the present embodiment, the lower end of the transmission plate 34 and the upper portion of the liquid crystal 315 surface positioned symmetrically with the optical axis of the lens. It is necessary to pay attention to ghost or stray light generated in relation to (that is, the upper part of the reflector 316).
- the liquid crystal 315 emits light at all angles as a point light source. As shown in FIG. 7A, the upper and lower light rays X1U and X1L of the light emitted from the upper part of the liquid crystal 315 are traced. The upper and lower limit light beams X1U and X1L are reflected by the transmission plate 34 and re-projected on the liquid crystal 315 surface (image range), for example, as indicated by X2. In this case, the image is observed by the user as ghost or stray light.
- FIG. 7B is a diagram for examining which range of output (video output) of the liquid crystal 315 is reflected by the transmission plate 34 and re-projected on the liquid crystal 315 surface.
- a light beam X3 is drawn at the lower end of the transmission plate 34, which is orthogonal to the transmission plate 34, that is, the incident angle with respect to the transmission plate 34 is 0 degree.
- a light beam X3 ′ that is refracted through the finder optical system 32 is drawn. Then, the position on the surface of the liquid crystal 315 where the light beam X3 ′ reaches is obtained.
- the arrival position of the light beam X3 ′ thus obtained on the liquid crystal surface 315 is 0.51 mm from the upper end of the liquid crystal 315 surface (image range).
- the video output from the position of 0.51 mm to the upper end of the liquid crystal 315 surface is incident on the transmission plate 34 at an incident angle of 0 ° or more, and a part of the image is reflected downward by the transmission plate 34.
- Light is reprojected onto the surface of the liquid crystal 315, producing ghost or stray light.
- FIG. 7C is a diagram for explaining a case where the tilt angle of the transmission surface 341 is adjusted so that this reflection does not occur.
- the light beam is drawn in the same manner as in FIG. 7B, but in FIG. 7C, the light beam X3 ′ deviates from the surface of the liquid crystal 315 (image range).
- the predetermined angle of the transmission plate 34 is adjusted so as to reach the position. That is, with this configuration, the reflected light from the transmission plate 34 is projected to a position off the liquid crystal 315 surface. This is because any light (image) output from the liquid crystal 315 surface is incident on the transmission surface 341 with an incident angle of 0 degrees or more from below, and the reflected light of the transmission surface 341 is transmitted from the liquid crystal 315 surface. Projected on top. Thus, any image output from the liquid crystal surface does not return to the liquid crystal surface due to reflection by the transmission plate 34, and the generation of ghost or stray light can be reduced.
- the angle of the transmission plate 34 can be adjusted by the method described above.
- the finder unit casing 35 is provided with a non-reflective coating so as to absorb the light incident on the finder unit casing 35.
- a non-reflective coating so as to absorb the light incident on the finder unit casing 35.
- the paint for example, an epoxy black paint or an acrylic black paint can be used. Thereby, generation of ghost or stray light due to reflection inside the finder unit housing 35 is reduced.
- the present invention is not limited to this, and a surface treatment for diffusing the light incident on the inside of the housing 35 may be performed inside the finder unit housing 35.
- FIG. 8 is a schematic diagram for explaining a light path in the electronic viewfinder 3.
- the light emitted from the light source 311 is diffused by the diffusion plate 312. Only the linearly polarized light is transmitted through the first polarizing plate 313 from the light diffused by the diffusion plate 312.
- the linearly polarized light transmitted by the first polarizing plate 313 is reflected by the second polarizing plate 314.
- the polarization axis is twisted 45 degrees.
- the linearly polarized light whose polarization axis is twisted 45 degrees is reflected by the reflecting plate 316.
- the linearly polarized light reflected by the reflecting plate 316 passes through the liquid crystal 315 again, the polarization axis is twisted 45 degrees.
- the polarization axis of the linearly polarized light reflected through the liquid crystal 315 to which no voltage is applied is twisted by 90 degrees. That is, the light reflected by the reflecting plate 316 is twisted into a predetermined polarization state that can pass through the second polarizing plate 314.
- the linearly polarized light twisted to the predetermined polarization state (hereinafter referred to as internal polarization) passes through the second polarizing plate 314 and is output from the reflective liquid crystal display 31 as an optical image signal.
- the light output from the reflective liquid crystal display 31 is refracted by the finder optical system 32 and enters the transmission plate 34.
- part of the light output from the upper end of the liquid crystal 315 and incident on the transmission plate 34 is transmitted through the transmission plate 34, and the remaining part is reflected by the transmission surface 341.
- the light reflected by the transmission surface 341 of the transmission plate 34 is internal polarization having a polarization axis that passes through the second polarizing plate 314, it passes through the finder optical system 32 and then passes through the second polarizing plate 314.
- the light is incident on a position off the surface of the liquid crystal 315.
- the term association electronic viewfinder 3 is an example of an electronic viewfinder device.
- the reflective liquid crystal display 31 is an example of a reflective liquid crystal display.
- the light source 311 is an example of a light source.
- the liquid crystal 315 is an example of a liquid crystal plate.
- the reflection plate 316 is an example of a reflection plate.
- the finder optical system 32 is an example of a finder optical system.
- the second polarizing plate 314 is an example of a polarizing plate.
- the transmission plate 34 is an example of a transmission plate.
- the predetermined angle at which the transmission plate 34 is tilted is an angle at which the light (image) output from the liquid crystal surface is incident from below the position where the incident angle is 0 degrees.
- any image output from the liquid crystal surface is an angle at which the image does not return to the liquid crystal surface due to reflection by the transmission plate 34.
- the electronic viewfinder 3 of the present embodiment includes a reflective liquid crystal display 31 that outputs an optical image signal, a finder optical system 32 that condenses the optical image signal output from the reflective liquid crystal display 31, and a finder optical system. And a transmission plate 34 that transmits a part of the optical image signal collected by 32 and reflects at least a part of the remaining optical image signal.
- the reflective liquid crystal display 31 includes a light source 311 that emits light in a direction intersecting the optical axis from the side of the optical axis of the finder optical system 32, and an optical axis on the optical axis of the finder optical system 32 with respect to the optical axis.
- the liquid crystal 315 is disposed so that the surface is vertical, and the reflector 316 is disposed on the optical axis of the finder optical system 32 on the back surface side of the liquid crystal 315 so that the reflection surface is perpendicular to the optical axis.
- the second polarizing plate 314 is disposed on the optical axis of the finder optical system 316 so as not to be perpendicular to the optical axis, and reflects the light emitted from the light source 311 to the reflecting plate 316 side.
- the optical image signal that passes through the liquid crystal 315 and is reflected by the reflecting plate 316 in the optical axis direction is transmitted to the finder optical system 32 side.
- the transmission plate 34 is disposed so as to be inclined at a predetermined angle in a direction opposite to the inclination direction of the second polarizing plate 314 so that the transmission surface 341 does not become perpendicular to the optical axis of the finder optical system 32.
- the optical image signal reflected by the transmission surface 341 can be prevented from entering the reflecting plate 316 via the finder optical system 32. That is, in the electronic viewfinder 3 provided with the reflective liquid crystal display 31, the generation of ghost or stray light can be reduced.
- the transmission plate 34 is disposed so as to be inclined in the direction opposite to the inclination direction of the second polarizing plate 314.
- the second polarizing plate 314 is disposed so as to be inclined in a direction opposite to the inclination direction of the transmission plate 34. Therefore, even when the optical image signal reflected by the transmission surface 341 enters the second polarizing plate 314 through the finder optical system 32, the incident light beam returns to the transmission plate 34 through the finder optical system 32. It is reduced. Thereby, in the electronic viewfinder 3 provided with the reflective liquid crystal display 31, the generation of ghost or stray light can be further reduced.
- the transmission plate 34 is disposed so as to be inclined so that the lower end of the transmission surface 341 is closer to the finder optical system 32 in the optical axis direction than the upper end. Thereby, when viewed from the user side, the transmission surface 341 faces downward. For this reason, it can reduce that external light, such as sunlight which injects from the upper part, is reflected by the permeation
- the transmission plate 34 by tilting the transmission plate 34 as described above, the reflected light incident from above is directed obliquely downward in a direction away from the optical axis.
- the reflected light incident from above is directed obliquely downward in a direction away from the optical axis.
- the light source 311 is arranged below the optical axis of the finder optical system 32. If it is disposed above the optical axis, the light source 311 protrudes above the finder optical system 32. However, in the present embodiment, the light source 311 is disposed below the optical axis and thus does not protrude upward. Therefore, it is possible to suppress the height of the camera body 2 from being increased and to reduce the size of the camera body 2.
- the transmission plate 34 is temporarily disposed so that the lower end of the transmission surface 341 is separated from the finder optical system 32.
- the user can easily see obliquely below the optical axis from the upper side of the transmission plate 34. That is, the user can easily see the light source 311 portion.
- the transmissive plate 34 is disposed so as to be inclined so that the lower end of the transmissive surface 341 approaches the finder optical system 32, so that the user cannot easily see the light source 311 portion.
- Embodiment 1 was illustrated as embodiment of this invention. However, the present invention is not limited to the first embodiment, and can be implemented in other embodiments. Therefore, another embodiment of the present invention will be described below.
- Embodiment 1 an example in which the present invention is applied to an interchangeable lens type camera system has been described.
- the present invention is not limited to this, and the present invention may be applied to an electronic viewfinder provided in a compact digital camera.
- CMOS image sensor is used as an example of the image sensor.
- the present invention is not limited to this, and a CCD image sensor can also be used as the imaging device.
- the transmission plate 34 is tilted with the left-right direction of the transmission surface 341 as an axis.
- the present invention is not limited to this, and the transmission plate may be tilted about the vertical direction of the transmission surface.
- the transmission plate 34 is provided so that the transmission surface 341 is not perpendicular to the optical axis of the finder optical system 32, and the optical image signal reflected by the transmission surface 341 is displayed on the finder optical system 32. So that it is not incident on the reflector.
- the present invention is not limited to this, and the transmission plate 34 is provided so that the transmission surface 341 is not perpendicular to the optical axis of the finder optical system 32, and the optical image signal reflected by the transmission surface 341 passes through the finder optical system 32. It is also possible to reduce the incidence on the reflecting plate through. This can also reduce the occurrence of ghost or stray light.
- FIG. 11 is a diagram illustrating an arrangement example of each component when the electronic viewfinder 3 is viewed from above.
- the reflective liquid crystal display 31, the finder optical system 32, and the transmission plate 34 are provided on a straight line.
- the present invention is not limited to this, and a mirror 40a may be provided between the finder optical system 32a and the transmission plate 34a as shown in FIG.
- a mirror 40b may be provided between the reflective liquid crystal display 31b and the finder optical system 32b.
- the reflective liquid crystal display of the present invention is not limited to the reflective liquid crystal display 31 of the first embodiment, and may have any configuration.
- the present invention is applicable to an electronic viewfinder having a reflective liquid crystal display.
- the present invention can be applied to an electronic viewfinder provided in an imaging apparatus such as a digital camera.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
- Viewfinders (AREA)
- Liquid Crystal (AREA)
Abstract
Description
1.カメラシステムの概要
カメラシステム1は、図1のように、カメラ本体2と、カメラ本体2に着脱可能な交換レンズ9と、を備える。カメラ本体2は、電子ビューファインダ3と、CMOSイメージセンサ4と、画像処理部5と、コントローラ6と、カードスロット7と、電源ボックス8と、を備える。これによって、カメラ本体2は、CMOSイメージセンサ4で撮像され、生成された画像データを、電子ビューファインダ3に表示できる。また、カメラ本体2は、カードスロット7に挿入されるメモリカードXに記憶された画像データを、電子ビューファインダ3に表示することもできる。
図2はカメラ本体の斜視図、図3はカメラ本体の外装ケースの上部材を取り外した状態を示す斜視図、図4は電子ビューファインダの斜視図である。電子ビューファインダ3は、カメラ本体2の外装ケースにおける上部材が外された状態で、カメラ本体2の外装ケースの下部材に設けられたシャーシに、ネジで螺着される。電子ビューファインダ3は、画像処理部5やコントローラ6が設けられる基板と、フレキシブル配線基板36によって接続される。このフレキシブル配線基板36は、画像データ用の信号線と、電源用の信号線を有する。これによって、電子ビューファインダ3は、画像処理部5やコントローラ6から出力される画像データを受け付けることが可能である。また、電子ビューファインダ3は、電源ボックス8に設けられる電池から電力供給を受ける。
このように構成された電子ビューファインダ3の光の経路を、図8を用いて説明する。図8は、電子ビューファインダ3内の光の経路を説明するための模式図である。
電子ビューファインダ3は、電子ビューファインダ装置の一例である。反射型液晶ディスプレイ31は、反射型液晶ディスプレイの一例である。光源311は、光源の一例である。液晶315は、液晶板の一例である。反射板316は、反射板の一例である。ファインダ光学系32は、ファインダ光学系の一例である。第2偏光板314は、偏光板の一例である。透過板34は、透過板の一例である。
本実施の形態の電子ビューファインダ3は、光学画像信号を出力する反射型液晶ディスプレイ31と、反射型液晶ディスプレイ31から出力された光学画像信号を集光するファインダ光学系32と、ファインダ光学系32によって集光された光学画像信号の一部を透過し、残りの少なくとも一部を反射する透過板34と、を備える。反射型液晶ディスプレイ31は、ファインダ光学系32の光軸の側方から該光軸に対して交差する方向に光を放射する光源311と、ファインダ光学系32の光軸上に該光軸に対して表面が垂直となるように配置された液晶315と、液晶315の裏面側にファインダ光学系32の光軸上に該光軸に対して反射面が垂直となるように配置された反射板316と、第2偏光板314と、を備える。第2偏光板314は、ファインダ光学系316の光軸上に該光軸に対して垂直とならないように傾斜して配置され、光源311から放射された光を反射板316側に反射すると共に、液晶315を通過して反射板316で光軸方向に反射された光学画像信号をファインダ光学系32側へ透過させる。透過板34は、透過面341がファインダ光学系32の光軸に対して垂直とならないように第2偏光板314の傾斜方向とは反対方向に所定角度傾斜して配置されている。
本発明の実施の形態として、実施の形態1を例示した。しかし、本発明は、実施の形態1に限定されず、他の実施の形態においても実現可能である。そこで、本発明の他の実施の形態を以下まとめて説明する。
2 カメラ本体
3 電子ビューファインダ
4 CMOSイメージセンサ
5 画像処理部
6 コントローラ
7 カードスロット
8 電源ボックス
9 交換レンズ
31 反射型液晶ディスプレイ
311 光源
312 拡散板
313 第1偏光板
314 第2偏光板
315 液晶
316 反射板
317 反射防止マスク
318 液晶ドライバ
32 ファインダ光学系
33 視度調整機構
34 透過板
341 透過面
35 ファインダユニット筐体
36 フレキシブル配線基板
37 裏ケース
Claims (4)
- 撮像装置に設けられる電子ビューファインダ装置であって、
光学画像信号を出力する反射型液晶ディスプレイと、
前記反射型液晶ディスプレイから出力された光学画像信号を集光するファインダ光学系と、
前記ファインダ光学系によって集光された光学画像信号の一部を透過し、残りの少なくとも一部を反射する透過板と、
を備え、
前記反射型液晶ディスプレイは、
光を放射する光源と、
前記ファインダ光学系の光軸上に該光軸に対して表面が垂直となるように配置された液晶板と、
前記液晶板の裏面側に前記ファインダ光学系の光軸上に該光軸に対して反射面が垂直となるように配置され、前記液晶板を介して光源から入射した光を反射する反射板と、
前記ファインダ光学系の光軸に対して垂直とならないように傾斜して配置され、前記光源から放射された光を前記反射板側に反射すると共に、前記液晶板を通過して反射板で反射された光を光学画像信号としてファインダ光学系側へ透過させる偏光板と、
を備え、
前記透過板は、
透過面が前記ファインダ光学系の光軸に対して垂直とならないように前記偏光板の傾斜方向とは反対方向に傾斜して配置される、
電子ビューファインダ装置。 - 請求項1に記載の電子ビューファインダ装置であって、
撮像装置に備えられる場合に、
前記偏光板および透過板は、傾斜させたことにより光軸方向で前記ファインダ光学系に近づく側が、離れる側に対して前記撮像装置の上下方向で下方に位置するように配置される、
電子ビューファインダ装置。 - 請求項1に記載の電子ビューファインダ装置を備えた撮像装置。
- 請求項3に記載の撮像装置であって、
前記偏光板および透過板は、傾斜させたことにより光軸方向で前記ファインダ光学系に近づく側が、離れる側に対して前記撮像装置の上下方向で下方に位置するように配置される、
撮像装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009545421A JP4500889B2 (ja) | 2008-07-18 | 2009-07-09 | 電子ビューファインダ装置、撮像装置 |
CN2009801277095A CN102099724B (zh) | 2008-07-18 | 2009-07-09 | 电子取景器装置,摄像装置 |
US13/054,324 US8175451B2 (en) | 2008-07-18 | 2009-07-09 | Electronic viewfinder apparatus and imaging apparatus |
US13/441,094 US20120194725A1 (en) | 2008-07-18 | 2012-04-06 | Eletronic viewfinder device and imaging device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-186940 | 2008-07-18 | ||
JP2008186940 | 2008-07-18 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/441,094 Continuation US20120194725A1 (en) | 2008-07-18 | 2012-04-06 | Eletronic viewfinder device and imaging device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010007747A1 true WO2010007747A1 (ja) | 2010-01-21 |
Family
ID=41550159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/003207 WO2010007747A1 (ja) | 2008-07-18 | 2009-07-09 | 電子ビューファインダ装置、撮像装置 |
Country Status (4)
Country | Link |
---|---|
US (2) | US8175451B2 (ja) |
JP (1) | JP4500889B2 (ja) |
CN (1) | CN102099724B (ja) |
WO (1) | WO2010007747A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012049614A (ja) * | 2010-08-24 | 2012-03-08 | Canon Inc | 撮像装置 |
JP2013198146A (ja) * | 2012-03-23 | 2013-09-30 | Citizen Finetech Miyota Co Ltd | 反射型液晶表示装置を用いた電子ビューファインダー |
JP2016062088A (ja) * | 2014-09-22 | 2016-04-25 | シチズンファインデバイス株式会社 | 電子ビューファインダ装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102099724B (zh) * | 2008-07-18 | 2012-11-21 | 松下电器产业株式会社 | 电子取景器装置,摄像装置 |
KR102480080B1 (ko) * | 2015-04-16 | 2022-12-22 | 코어포토닉스 리미티드 | 소형 접이식 카메라의 오토 포커스 및 광학 이미지 안정화 |
WO2018020816A1 (ja) * | 2016-07-29 | 2018-02-01 | マクセル株式会社 | 撮像装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0568189A (ja) * | 1991-09-09 | 1993-03-19 | Fuji Photo Film Co Ltd | ビユーフアインダ |
JPH06242435A (ja) * | 1992-12-25 | 1994-09-02 | Olympus Optical Co Ltd | 画像観察装置 |
JP2002267948A (ja) * | 2001-03-14 | 2002-09-18 | Minolta Co Ltd | 液晶ビューファインダ |
JP2003161915A (ja) * | 2001-11-27 | 2003-06-06 | Minolta Co Ltd | 電子ビューファインダ |
JP2003204455A (ja) * | 2002-01-04 | 2003-07-18 | Canon Inc | 電子ビューファインダーおよびデジタルカメラシステム |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06141259A (ja) | 1992-10-26 | 1994-05-20 | Sony Corp | 眼鏡型映像表示装置 |
JPH0764153A (ja) | 1993-08-24 | 1995-03-10 | Sony Corp | カメラのファインダレンズカバー |
US20020167645A1 (en) * | 2001-05-10 | 2002-11-14 | Johnson Bruce K. | System and method for selectively viewing or printing images from a reflective device using an arrangement of polarizers and a polarizing beam splitter |
CN101160548A (zh) * | 2005-10-20 | 2008-04-09 | 精工爱普生株式会社 | 图像显示装置 |
JP5209193B2 (ja) | 2006-09-12 | 2013-06-12 | シチズンファインテックミヨタ株式会社 | 液晶表示装置及びそれを用いた電子ビューファインダー |
CN102099724B (zh) * | 2008-07-18 | 2012-11-21 | 松下电器产业株式会社 | 电子取景器装置,摄像装置 |
-
2009
- 2009-07-09 CN CN2009801277095A patent/CN102099724B/zh active Active
- 2009-07-09 US US13/054,324 patent/US8175451B2/en active Active
- 2009-07-09 WO PCT/JP2009/003207 patent/WO2010007747A1/ja active Application Filing
- 2009-07-09 JP JP2009545421A patent/JP4500889B2/ja not_active Expired - Fee Related
-
2012
- 2012-04-06 US US13/441,094 patent/US20120194725A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0568189A (ja) * | 1991-09-09 | 1993-03-19 | Fuji Photo Film Co Ltd | ビユーフアインダ |
JPH06242435A (ja) * | 1992-12-25 | 1994-09-02 | Olympus Optical Co Ltd | 画像観察装置 |
JP2002267948A (ja) * | 2001-03-14 | 2002-09-18 | Minolta Co Ltd | 液晶ビューファインダ |
JP2003161915A (ja) * | 2001-11-27 | 2003-06-06 | Minolta Co Ltd | 電子ビューファインダ |
JP2003204455A (ja) * | 2002-01-04 | 2003-07-18 | Canon Inc | 電子ビューファインダーおよびデジタルカメラシステム |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012049614A (ja) * | 2010-08-24 | 2012-03-08 | Canon Inc | 撮像装置 |
US8992031B2 (en) | 2010-08-24 | 2015-03-31 | Canon Kabushiki Kaisha | Imaging apparatus |
JP2013198146A (ja) * | 2012-03-23 | 2013-09-30 | Citizen Finetech Miyota Co Ltd | 反射型液晶表示装置を用いた電子ビューファインダー |
JP2016062088A (ja) * | 2014-09-22 | 2016-04-25 | シチズンファインデバイス株式会社 | 電子ビューファインダ装置 |
Also Published As
Publication number | Publication date |
---|---|
CN102099724B (zh) | 2012-11-21 |
CN102099724A (zh) | 2011-06-15 |
US20110116781A1 (en) | 2011-05-19 |
JP4500889B2 (ja) | 2010-07-14 |
US8175451B2 (en) | 2012-05-08 |
US20120194725A1 (en) | 2012-08-02 |
JPWO2010007747A1 (ja) | 2012-01-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102578625B1 (ko) | 기판 유도식 광학 장치 | |
JP4500889B2 (ja) | 電子ビューファインダ装置、撮像装置 | |
US10901209B2 (en) | Head-up display device | |
US8087789B2 (en) | Projection optical system and projection display device | |
TWI434121B (zh) | 雙向攝影裝置及可攜式電子裝置 | |
CN113900182B (zh) | 光学装置及头戴式显示设备 | |
JP6737291B2 (ja) | 表示装置及びヘッドアップディスプレイ | |
KR101524933B1 (ko) | 증강현실 구현을 위한 광학시스템장치 및 헤드마운트 디스플레이장치 | |
JP3235064U (ja) | 導光光学素子に結合された画像プロジェクタ | |
US20230418147A1 (en) | Lens apparatus and image pickup apparatus | |
JP2012185479A (ja) | 投射型表示装置、携帯型電子機器およびデジタルカメラ | |
JP2019211664A (ja) | 撮像装置 | |
TWI772770B (zh) | 影像中繼裝置及影像投影系統 | |
JP2001083604A5 (ja) | ||
US7616884B2 (en) | Viewfinder for single lens reflex camera | |
JP2002365585A (ja) | 頭部装着用ディスプレー用光学システム | |
JP2007328086A (ja) | 投写光学系及びプロジェクタ | |
CN219960670U (zh) | 近眼显示设备 | |
CN216351538U (zh) | 一种虚拟现实显示设备的光学***和虚拟现实显示设备 | |
CN215297927U (zh) | 一种投影机光学装置和投影机 | |
JP2007093888A (ja) | ファインダ光学系及びこれを搭載する光学機器 | |
JP2006194992A (ja) | 焦点検出装置 | |
JP4821755B2 (ja) | プロジェクタ装置 | |
JPH07140525A (ja) | ファインダ装置 | |
JP2009003209A (ja) | 光学観察装置及び撮像装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980127709.5 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2009545421 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09797676 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13054324 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09797676 Country of ref document: EP Kind code of ref document: A1 |