WO2005114988A1 - 光路切換機能付き電子機器 - Google Patents
光路切換機能付き電子機器 Download PDFInfo
- Publication number
- WO2005114988A1 WO2005114988A1 PCT/JP2005/007442 JP2005007442W WO2005114988A1 WO 2005114988 A1 WO2005114988 A1 WO 2005114988A1 JP 2005007442 W JP2005007442 W JP 2005007442W WO 2005114988 A1 WO2005114988 A1 WO 2005114988A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- unit
- light source
- optical path
- liquid crystal
- Prior art date
Links
Classifications
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Definitions
- the present invention relates to an electronic apparatus including a camera and a liquid crystal display panel typified by a camera-equipped mobile phone, a digital camera or a video camera, and more particularly to illuminating light emitted from a light source on the liquid crystal display panel.
- the present invention relates to a configuration of an optical path switching unit that switches to an illumination unit side of an object photographed by a camera or to both of them.
- the method includes a light source and an optical path for illuminating the subject separately from the light source and the optical path for illuminating the liquid crystal display panel, and the drive circuit of the liquid crystal display panel is controlled.
- an apparatus having a light source and an optical path for illuminating a subject separately from a light source and an optical path for illuminating a liquid crystal display panel, and an apparatus for switching the direction of a reflector have a large number of parts, a complicated structure, and a large electronic device. Therefore, it is hardly applicable to an electronic device such as a camera-equipped mobile phone which requires particularly small size and light weight.
- a liquid crystal display panel used as a means for illuminating a subject, When the subject is switched, it is not possible to display the necessary information on the LCD panel when the subject is illuminated. There is an inconvenience that it is not possible to confirm and the use of electronic equipment becomes inconvenient.
- the present invention has been made in order to solve the deficiencies of the prior art which is powerful, and its purpose is to make the liquid crystal display smaller and lighter, consume less power and select the illumination optical path.
- the present invention provides an electronic device with an optical path switching function, a liquid crystal display panel, an illuminating unit of the liquid crystal display panel, a camera, and an object photographed by the camera.
- the optical path switching unit includes the light source, the illumination unit, and the illumination.
- An electrically controlled diffractive optical element disposed between the switch, a switch for selecting an optical path, and electrically controlling a diffraction efficiency of the electrically controlled diffractive optical element according to an output signal of the switch. It is configured to consist of a control unit.
- An electrically controlled diffractive optical element is a device in which a polymer-dispersed liquid crystal is sealed between two transparent substrates disposed so as to face each other with the transparent electrode film inside, and the voltage applied between the transparent electrode films. By controlling the applied voltage, the diffraction efficiency of transmitted or reflected light is changed. Therefore, the optical path switching unit provided with the electrically controlled diffractive optical element switches the control voltage of the electrically controlled diffractive optical element output from the control unit by operating the switch unit, and the diffraction efficiency of transmitted or reflected light. The light emitted from the light source can be switched to the illuminating part side of the liquid crystal display panel and / or the illuminating part side of the subject by changing the distance.
- the electronic device uses one light source for the illuminating portion side of the liquid crystal display panel or the illuminating portion side of the subject, so that the light source is independently used for illuminating the liquid crystal display panel and illuminating the subject. Power consumption can be suppressed as compared with the case where the light source is provided.
- the optical path switching unit since the optical path switching unit has no mechanically movable unit, the structure of the electronic device can be simplified and downsized.
- the circuit of the electrically controlled diffractive optical element By controlling the folding efficiency, the emitted light can be distributed to both the illuminating part side of the liquid crystal display panel and the illuminating part side of the subject, so that the finder cannot be confirmed when illuminating the subject. It does not cause any special inconvenience.
- the present invention provides the electronic device with an optical path switching function having the above-mentioned configuration, wherein the light source emits monochromatic light, and the illuminating unit and the illuminating unit convert the monochromatic light into white light.
- the configuration is such that a light conversion section made of a phosphor is provided.
- the wavelength range of the spectrum of the diffracted light is widened, so that the image of the liquid crystal display panel or the image of the subject illuminated by this diffracted light becomes rainbow-colored, and the natural feeling is lost.
- the wavelength band of the diffracted light is limited, so that the illuminating part of the liquid crystal display panel and the illuminating part of the subject emit phosphors that convert monochromatic light into white light. If a light conversion unit is provided, the image on the liquid crystal display panel or the image of the object can be made to be a color close to nature, and discomfort in use can be eliminated.
- the present invention in the electronic device with an optical path disconnection having the above configuration, further comprising: a drive switch section of a shirt provided with the camera; and a subject illuminance measuring section for measuring illuminance of the subject.
- the control unit captures an output signal of the subject illuminance measurement unit and determines the output signal in advance.
- the diffraction efficiency of the electrically controlled diffractive optical element is electrically controlled to temporarily emit strong light from the optical path on the illumination side.
- the optical path switching unit including the electrically controlled diffractive optical element can arbitrarily and instantaneously change the diffraction efficiency of transmitted or reflected light by changing the control voltage of the electrically controlled diffractive optical element.
- the control voltage By switching the control voltage, it is possible to continuously emit medium-level light, temporarily emit strong light, or intermittently emit strong light by switching the control voltage. Radiation can also be performed arbitrarily.
- the output signal of the object illuminance measurement unit is equal to or less than a predetermined value, if a strong light is temporarily emitted from the light path on the illumination side, so-called flash photography can be performed.
- the light radiated from the light path on the lighting side is called a picture light or Can be used as video light.
- strong light is emitted intermittently, so-called strobe shooting becomes possible.
- the electronic device with an optical path switching function of the present invention includes an electrically controlled diffractive optical element and a switch section for selecting an optical path in an optical path switching section that switches light emitted from a light source to an illuminating section or an illuminating section.
- a control unit for electrically controlling the diffraction efficiency of the electrically controlled diffractive optical element in accordance with the output signal of the switch unit, wherein the light emitted from the light source is illuminated on the liquid crystal display panel side or on the subject. Switching to the illuminating unit side or both can reduce power consumption as compared to the case where each has its own light source for illuminating the liquid crystal display panel and illuminating the subject. Since there is no mechanically movable part, the structure of the electronic device can be simplified and downsized, and the finder can be confirmed even when the object is illuminated.
- FIG. 1 is a perspective view of the mobile phone according to the embodiment with the housing closed
- FIG. 2 is a perspective view of the mobile phone according to the embodiment with the housing open
- FIG. 3 is a view of the mobile phone according to the embodiment.
- FIG. 4 is a perspective view schematically showing an illumination path of a liquid crystal display panel provided in a mobile phone and an illumination path of a subject
- FIG. 4 is an explanatory view showing a configuration of an optical path switching unit according to an embodiment
- FIG. 5 is an embodiment.
- FIG. 6 is an explanatory diagram showing an application example of an electrically controlled diffractive optical element in an optical path switching unit according to the present invention.
- FIG. 6 is a configuration diagram showing an illumination path of a liquid crystal display panel provided in a mobile phone having two liquid crystal display panels and an illumination path of a subject. It is.
- the mobile phone of the present embodiment includes a first housing 2 and a second housing 3 foldably connected via a hinge 1 and a first housing 2.
- a liquid crystal display panel 4 with a display surface set on the inner surface, a speaker 5 with a vocal part set above the liquid crystal display panel 4, and a camera 6 with a shooting lens set on the outer surface of the first housing 2.
- a subject illuminating section 7 having a light emitting section set near the camera 6, an object illuminance measuring section 8 having a light incident section set near the camera 6, and an upper end of the first housing 2.
- the set switch section 9 for selecting the illumination light path, the set of operation switches 10 set on the inner surface of the second housing 3 and the switch section for driving the shutter. 11, a microphone 12 with a sound collecting section below the second housing 3, a control section 13 for controlling the entire system (see FIG. 3), and a power supply section 14 for supplying power to the system (see FIG. 4). ) And.
- an illuminating section (backlight) 21 is provided on the back surface of the liquid crystal display panel 4, and the illuminating section 21 includes a light source 22 and light emitted from the light source 22. Is introduced from one end, and is scattered at a uniform intensity from one side perpendicular to it.A square rod-shaped light guide 23, and the light emitted from the light guide 23 is introduced from one end, and from one surface orthogonal to it. It is composed of a square plate-shaped light guide plate 24 that scatters light at a uniform intensity.
- the subject illuminating section 7 includes the light source 22 and a light shaping member 25 such as a lens for shaping a light beam emitted from the light source 22.
- the light emitted from the light source 22 is switched between the light source 22 and the light shaping member 25 between the light incident surface of the light source 22 and the light guide 23 and the light incident portion of the light shaping member 25.
- An electrically controlled diffractive optical element 26 is provided. As shown in FIG. 4, the electrically controlled diffractive optical element 26 includes a subject illuminance measurement unit 8, an illumination light path selection switch unit 9, an operation switch group 10, a shutter driving switch unit 11, a control unit 13, and a power supply unit.
- the optical path switching unit 15 is configured in combination with the optical path switching unit 14.
- the wavelength range of the spectrum is widened. Therefore, the image of the liquid crystal display panel 4 illuminated by the diffracted light and the light from the subject illuminating section 7 The image of the illuminated subject becomes rainbow-colored and loses its natural feel. Therefore, in order to prevent an inconvenience, a light source that emits monochromatic light, such as a blue light emitting diode, is used as the light source 22, and the monochromatic light is converted into white light at the transmitting portion of the light that has passed through the electrically controlled diffractive optical element 26. It is preferable to provide a light conversion section 27 made of a phosphor for conversion.
- the light conversion section 27 can be provided by forming a required phosphor layer on the surface of the light guide plate 24, the light shaping member 25, etc., as shown in FIG. This is provided by interposing a light-transmissive member on which is formed at a predetermined position.
- the electrically controlled diffractive optical element 26 is a polymer-dispersed liquid crystal between two transparent substrates 33 and 34 which are disposed with the transparent electrode films 31 and 32 inside.
- the transparent electrode films 31, 32 are illuminated with the subject illuminance measurement unit 8 through the control unit 13.
- the optical path selection switch section 9, the operation switch group 10, the shutter driving switch section 11, and the power supply section 14 are electrically connected, and by controlling the voltage applied between the transparent electrode films 31, 32, By changing the diffraction efficiency, the intensity of light incident on the liquid crystal display panel 4 side and the object side is switched.
- the electrically controlled diffractive optical element 26 (1) transmits incident light when a voltage is applied between the transparent electrode films 31 and 32, and And (2) When the voltage is applied between the transparent electrode films 31 and 32, the incident light is transmitted and the transparent electrode film 21 is reflected.
- the control unit 13 generates a voltage signal to be applied to the electrically controlled diffractive optical element 26 based on output signals from the subject illuminance measurement unit 8, the illumination light path selection switch unit 9, and the shutter driving switch unit 11. Then, the intensity of light incident on the liquid crystal display panel 4 side and the object side is appropriately switched. That is, when the illuminance signal received from the subject illuminance measurement unit 8 is equal to or more than a predetermined value and the illumination light path selection switch unit 9 is not operated, the total amount of light emitted from the light source 22 is reduced. A voltage signal incident on the liquid crystal display panel 4 is applied to the electric control type diffractive optical element 26.
- the operation of the shutter driving switch unit 11 is performed.
- a voltage signal is input to the electrically controlled diffractive optical element 26 in which the entire amount of light emitted from the light source 22 is incident on the subject side.
- the illumination light path selection switch unit 9 is operated, a part of the light emitted from the light source 22, for example, a half signal is input to the liquid crystal display panel 4, and the remaining half is input to the object side.
- the electrically controlled diffractive optical element 26 for example, when strobe shooting is selected by operating the operation switch group 10 etc., the light source 22 A voltage signal that causes all light emitted from the light source to intermittently enter the object side can be applied to the electrically controlled diffractive optical element 26.
- the electric control type diffractive optical element 26 and the illumination light path selection are provided in the light path switching unit for switching the light emitted from the light source 22 to the liquid crystal display panel 4 side or the object side.
- a control unit 13 for electrically controlling the diffraction efficiency of the electrically controlled diffractive optical element 26 according to the output signal of the switch unit 9. 4 and / or the object side the power consumption can be suppressed as compared with the case where the liquid crystal display panel 4 is provided with its own light source for illuminating and the object is illuminated.
- the optical path switching unit since the optical path switching unit has no mechanically movable unit, the structure of the electronic device can be simplified and downsized. Furthermore, normal mode shooting and shooting using a picture light can be performed while checking the image displayed on the LCD panel, and special shooting such as flash shooting or flash shooting can be performed.
- a first electrically controlled diffractive optical element 26a is set on an end face of a first illuminating section 21a for illuminating a backlight on a first liquid crystal display panel (not shown).
- a second electrically controlled diffractive optical element 26b is set on an end face of a second illuminating section 21b for illuminating a knock light on a second liquid crystal display panel (not shown), and light emitted from the light source 22 The light is guided to the light shaping member 25 via the electrically controlled diffractive optical element 26a and the second electrically controlled diffractive optical element 26b.
- the light shaping member 25 is provided on the optical path on the subject side, but the diffraction pattern of the light diffracted by the electrically controlled diffractive optical elements 26, 26a, 26b must be devised. This can be omitted.
- the second liquid crystal display panel and the light shaping member 25 that is a subject illuminating unit are provided, but the second liquid crystal display panel set on the outer surface of the first housing 2 is connected to the subject. It can be used as a lighting means.
- the illumination light path selection switch section 9 is provided, and the user switches the switch section 9 to switch the illumination light path to the illumination side of the liquid crystal display panel or the illumination side of the subject.
- a circuit may be configured without the light path selecting switch section 9 so that the existing operation switch group 10 is operated to select the illumination light path.
- the electronic device is provided with a switch for position detection, and when the electronic device has a predetermined specific posture, the switch is automatically detected and detected by the switch for position detection.
- the circuit can be configured so that the optical path is switched to the illumination side of the subject.
- the electronic device is provided with a wireless transmission / reception device, and a circuit is configured to switch an optical path to an illuminating side of a liquid crystal display panel or an illuminating side of a subject based on a transmission signal from another electronic device. It can also be configured.
- the present invention can be applied to other electronic devices such as a digital camera and a video camera, which are described by taking a camera-equipped mobile phone as an example.
- the present invention is useful as an electronic device including a camera and a liquid crystal display panel represented by a camera-equipped mobile phone, a digital camera or a video camera.
- FIG. 1 is a perspective view of a mobile phone according to an embodiment with a housing closed.
- FIG. 2 is a perspective view of the mobile phone according to the embodiment in a state where a housing is opened.
- FIG. 3 is a perspective view schematically showing an illumination path of a liquid crystal display panel and an illumination path of a subject provided in the mobile phone according to the embodiment.
- FIG. 4 is an explanatory diagram showing a configuration of an optical path switching unit according to the embodiment.
- FIG. 5 is an explanatory diagram showing an application example of an electrically controlled diffractive optical element in an optical path switching unit according to the embodiment.
- FIG. 6 is a configuration diagram showing an illumination path of a liquid crystal display panel and an illumination path of a subject provided in a mobile phone having two liquid crystal display panels.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Studio Devices (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-153450 | 2004-05-24 | ||
JP2004153450A JP2005340929A (ja) | 2004-05-24 | 2004-05-24 | 光路切換機能付き電子機器 |
Publications (1)
Publication Number | Publication Date |
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WO2005114988A1 true WO2005114988A1 (ja) | 2005-12-01 |
Family
ID=35428682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007442 WO2005114988A1 (ja) | 2004-05-24 | 2005-04-19 | 光路切換機能付き電子機器 |
Country Status (2)
Country | Link |
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JP (1) | JP2005340929A (ja) |
WO (1) | WO2005114988A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006043402B4 (de) * | 2006-09-15 | 2019-05-09 | Osram Gmbh | Beleuchtungseinheit mit einem optischen Element |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000155350A (ja) * | 1998-11-24 | 2000-06-06 | Nikon Corp | 撮像機器のフラッシュライト調光方法及び装置 |
JP2002311435A (ja) * | 2001-04-18 | 2002-10-23 | Matsushita Electric Ind Co Ltd | 液晶表示装置および撮像装置 |
JP2004110062A (ja) * | 1998-06-04 | 2004-04-08 | Seiko Epson Corp | 光源装置,光学装置および液晶表示装置 |
-
2004
- 2004-05-24 JP JP2004153450A patent/JP2005340929A/ja not_active Withdrawn
-
2005
- 2005-04-19 WO PCT/JP2005/007442 patent/WO2005114988A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004110062A (ja) * | 1998-06-04 | 2004-04-08 | Seiko Epson Corp | 光源装置,光学装置および液晶表示装置 |
JP2000155350A (ja) * | 1998-11-24 | 2000-06-06 | Nikon Corp | 撮像機器のフラッシュライト調光方法及び装置 |
JP2002311435A (ja) * | 2001-04-18 | 2002-10-23 | Matsushita Electric Ind Co Ltd | 液晶表示装置および撮像装置 |
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Publication number | Publication date |
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JP2005340929A (ja) | 2005-12-08 |
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