WO2015170405A1 - 投写型映像表示装置 - Google Patents
投写型映像表示装置 Download PDFInfo
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- WO2015170405A1 WO2015170405A1 PCT/JP2014/062485 JP2014062485W WO2015170405A1 WO 2015170405 A1 WO2015170405 A1 WO 2015170405A1 JP 2014062485 W JP2014062485 W JP 2014062485W WO 2015170405 A1 WO2015170405 A1 WO 2015170405A1
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- light source
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- display apparatus
- projection display
- projection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3144—Cooling systems
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- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
-
- 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
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
- G03B33/06—Colour photography, other than mere exposure or projection of a colour film by additive-colour projection apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/30—Picture reproducers using solid-state colour display devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3158—Modulator illumination systems for controlling the spectrum
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3164—Modulator illumination systems using multiple light sources
Definitions
- the present invention relates to a projection display apparatus.
- the projection-type image display device is applied to a large-sized projection television.
- an external image signal is input and the image is enlarged to display a panel or wall surface. It is also widely used as a means for projecting onto a screen.
- PC personal computer
- portable terminals such as iPhone and iPad mini onto walls and desk surfaces. It is also expected as a means to make it possible.
- Details of a projection lens system including a reflecting mirror (free-form surface mirror) and a free-form surface lens for this purpose are already known from Patent Document 2 below.
- the posture changes depending on the use situation.
- a solid-state light source using a semiconductor light-emitting element such as an LED or a laser element that is excellent in light conversion efficiency, life, and handleability is used. Has been widely adopted.
- the projection display apparatus it is particularly important to efficiently release the heat generated from the above-described solid light source to the outside in order to sufficiently exhibit its performance. Efficient cooling using a heat pipe or the like is performed.
- the present invention has been achieved in view of the above-described problems in the prior art, and in particular, the posture (installation state) of the projector is connected to a portable terminal or a PC and projects an image. It is an object of the present invention to provide a projection-type image display apparatus that is used in various ways according to the above, particularly a cooling structure for the solid-state light source.
- a projection-type image display apparatus comprising: an image processing unit that generates the image light to be enlarged and projected; and a projection optical system that enlarges and projects the image light from the image processing unit, wherein the light source unit is at least a solid
- the solid light sources includes a red (R) solid light source, a green (G) solid light source, and a blue (B) solid light source, each of which is provided with a cooling means.
- the projection (installation state) shows the optimum light emission characteristics depending on the situation, and is excellent in practical use.
- a type video display device can be provided.
- FIG. 6 is a cross-sectional view taken along the line A-A ′ of FIG. 5 for illustrating a cooling structure inside the housing of the projection display apparatus.
- FIG. 6 is a cross-sectional view taken along the line B-B ′ of FIG. 5 for illustrating a cooling structure inside the housing of the projection display apparatus.
- the partially expanded view for demonstrating the cooling structure of the LED illumination unit in a projection type video display apparatus It is a figure which shows the relationship between an input electric current and the amount of light beams to generate
- FIG. 1 is a front view showing the appearance of a projection display apparatus.
- reference numeral 1 denotes a lower case of the apparatus
- 2 denotes an upper case thereof
- 3 denotes an upper surface of the upper case.
- 4 is an openable / closable mirror cover formed on the side surface of the lower case, and an exhaust port for exhausting heat generated inside the apparatus to the outside (strictly speaking,
- a sirocco fan and an axial fan are provided in the apparatus. “C” is added to the air exhaust port from the sirocco fan after the code, and the air exhaust port from the axial fan is "A" is added after the display).
- the lower case 1 and the upper case 2 form a casing having a substantially flat outer shape of the apparatus.
- the back side of the device is upright. It is possible to do.
- FIG. 2 is a side view of the projection display apparatus, and a reflection mirror (free-form curved mirror) formed in a convex shape and rotationally asymmetrically inside the mirror cover 3 attached to the upper surface of the upper case so as to be openable and closable. 31 is attached, and a lens optical system 102 to be described below is arranged inside a convex portion formed in a substantially central portion (see FIG. 1) of the upper case for guiding the projection light to the outside. An opening is formed (in the drawing, only a part of the lens optical system 102 is shown through the opening).
- Reference numeral 5 in the figure indicates a part of a so-called focus adjustment ring (an upper end portion protruding from the upper case) for adjusting the focus state of the projected image by changing the lens position by the lens adjustment mechanism.
- reference numeral 6 in the figure denotes a so-called power inlet for supplying power (commercial power) necessary for the light source, the control device, etc., and is provided on the side surface of the lower case 1 (power supply unit). Side).
- FIG. 3 shows a side view of the projection display device opposite to that of FIG. 2, and the side surface of the lower case 1 (the side on which the LED lighting unit is provided) has an exhaust port 4 and an external device.
- a terminal board 7 having various terminals for inputting a video signal from a mobile terminal (for example, a portable terminal or a PC) is provided.
- the exhaust port 4 shown in the substantially central portion of the figure controls an electric circuit mounted inside the apparatus, in particular, an image processing apparatus, an LED drive board, and further controls the operation of the entire apparatus including these. It is an exhaust port for discharging the air from the sirocco fan for cooling the control part (for example, comprised by CPU) for doing.
- FIGS. 4 and 5 are both top views of the projection display apparatus with the upper case 2 removed to show the internal structure of the projection display apparatus.
- the optical system including the reflecting mirror 31 and the projection lens system 102 passes through the lower case 1, that is, the center axis (in the figure) where the central portion of the projection light travels through the center of the top view of the outer shape of the apparatus.
- a central axis (perpendicular to the plane) is arranged in the central part of the device.
- a power supply unit 61 is disposed on one side (left side in the figure) of the projection lens system 102 as a center, and a plurality of units (2 in this example) are provided on one end side of the power supply unit 61.
- the axial flow fan 42 is placed adjacent to each other.
- a sirocco fan 41 is disposed on the other side (right side in the figure) with the projection lens system 102 as the center.
- a part of the housing portion of the sirocco fan 41 is substantially integrated with the heat radiating fin, and the heat generated by the green (G) light emitting LED 75G of the LED lighting unit 71 is red (through the heat pipe 73G).
- the LED lighting unit 71 and the like for constituting the light source described above are arranged along the air flow generated by the sirocco fan 41. In other words, these components are arranged symmetrically about the projection lens system 102.
- Reference numeral 72 in the figure indicates a heat sink for cooling the DLP device, and reference numeral 4S indicates intake ports formed on the bottom surface and side surfaces of the lower case 1.
- each of these heat pipes 73 transfers the heat of the LED lighting unit 71 to the vicinity of the exhaust port, thereby efficiently dissipating heat.
- the green (G) light emitting LED 75G of the LED lighting unit 71 is connected to the vicinity of the exhaust port 4C via the heat pipe 73G
- the red (R) light emitting LED 75R is connected to the heat pipe 73R.
- the blue (B) light-emitting LED 75B is transmitted to the vicinity of the exhaust port 4C via the heat pipe 73B, and the cooling air generated by the sirocco fan 41 is transmitted to the vicinity of the exhaust port 4C.
- the heat is radiated through the heat radiation fins and discharged from the exhaust port 4C to the outside of the housing.
- FIGS. 6 is a cross-sectional view taken along the line AA ′ of the projection display apparatus shown in FIG. 5 with the mirror cover 3 closed
- FIG. 7 shows the projection display apparatus shown in FIG.
- FIG. 6 is a cross-sectional view taken along the line BB ′ with the mirror cover 3 opened.
- FIG. 6 shows a cooling structure of the LED lighting unit 71, and the sirocco fan 41 attached to the inside of the LED lighting unit 71 is externally connected via an intake port (not shown) formed on the bottom surface of the lower case 1.
- the air is sucked in and discharged from the air exhaust port 4C from the sirocco fan formed on the front of the apparatus (the right side surface in this figure).
- the heat from the three LEDs (semiconductor lasers) 75R, 75G, and 75B which are the main heat sources in the LED illumination unit 71
- the heat pipes 73R, 73G, 73B are transmitted to the front of the lower case 1 and the vicinity of the exhaust port 4C (see FIG. 7) formed on the side surface.
- one end of the LED is thermoconductively attached to the surface of the LED, and the other end is disposed in the vicinity of the exhaust port. Therefore, the three LEDs 75R, 75G, and 75B are efficiently cooled by transferring heat to the air sucked from the outside (heat exchange).
- the cooling structure described above is particularly suitable for cooling parts that generate heat locally, such as the LED lighting unit 71 (that is, three LEDs 75R, 75G, and 75B). .
- the heat pipes 73R, 73G, and 73B used in the LEDs are located near the exhaust port 4C.
- the numbers (heat exchange amounts) are arranged differently. Further, by setting the number of the heat pipes 73 to be appropriately set according to the amount of heat generated by the LED, a more efficient heat dissipation effect can be achieved.
- reference numeral 200 in FIG. 8 indicates an attitude sensor described in detail later.
- the present inventors examined the input current and the amount of generated light flux for three types of solid-state light sources that are solid-state light-emitting devices of the projection display apparatus, that is, the LEDs 75R, 75G, and 75B. The results are shown by the graph in FIG.
- the light output of the red (R) solid-state light source exhibits a good linearity with respect to input power in a wide range (for example, 0 to 5 A).
- the green (G) solid-state light source and the blue (B) solid-state light source have their luminous efficiency lowered as the temperature of the light source rises from the vicinity where the input power exceeds 3A.
- the three types of solid light sources that is, the LEDs 75R, 75G, and 75B described above, exhibit different characteristics in the junction temperature and the illuminance (absolute value), respectively.
- the results of studying each solid light source are shown by the graphs in FIGS.
- FIG. 10 shows the junction temperature and illuminance (absolute value) of the blue (B) solid light source
- FIG. 11 shows the junction temperature and illuminance (absolute value) of the red (R) solid light source
- FIG. G The junction temperature and illuminance (absolute value) in the solid state light source are shown. From these results, the change rate of the luminous efficiency with respect to the change of the junction temperature is the largest for the red (R) solid light source (approximately 20%), and then the change rate of the green (G) solid light source (approximately 2.5%). ) And the rate of change (approximately 0%) of the blue (B) solid light source. From this, it can be seen that it is preferable to make the cooling efficiency of the red (R) solid light source larger than the cooling efficiency of other solid light sources in order to maintain good color characteristics and long life.
- the performance of the heat pipes 73R, 73G, 73B for guiding the heat generated by the LEDs (semiconductor lasers) 75R, 75G, 75B to the outside is also affected by the influence of gravity. Change. That is, the installation state of the projection display device, for example, when installed horizontally (horizontal), installed vertically (vertically), installed tilted (tilted), or installed upside down It has been found that the performance changes depending on whether it is attached to the ceiling or hung from the ceiling, for example.
- the present invention is based on various findings by the present inventors described above, and these will be described in detail below.
- the light output with respect to the input power differs between the characteristics of the red (R) solid light source and the characteristics of the green (G) solid light source and the blue (B) solid light source.
- the characteristics of the red (R) solid light source and the characteristics of the green (G) solid light source and the blue (B) solid light source are measured in advance to prepare a table (conversion table) or the like, for example.
- a table conversion table
- the characteristics of the green (G) solid light source and the blue (B) solid light source are substantially the same as each other, but are greatly different from those of the red (R) solid light source. For example, as shown in FIG.
- the power output from the drive power supply circuit 76 is adjusted so that the characteristics of the red (R) solid light source match the characteristics of the green (G) solid light source and the blue (B) solid light source. It is preferable that correction (adjustment) is performed via a conversion circuit 77 such as a table.
- the cooling capacity (pipe diameter) of the heat pipe 73R for the red (R) solid light source is the largest. Set to something. Then, the end of the heat pipe 73R is fitted with a heat sink 4C S dedicated aspect, while the green (G) solid-state light source 75G and blue (B) solid-state light source 75B of the heat pipe 73G, the ends of 73B is attaching a heat sink 4C F in front of the common, further, it is considered such as by improving the larger to the cooling capacity of the heat radiating area of the heat sink 4C S dedicated side.
- T a predetermined period
- a posture sensor 200 is attached to a part of the sensor, and detection output from the posture sensor 200 (see FIG. 8) (for example, horizontal installation, vertical installation, horizontal left tilt installation, horizontal right tilt installation, vertical left tilt installation, vertical right It is desirable to control the input power of the red (R) solid light source, the green (G) solid light source, and the blue (B) solid light source based on inclination installation, upside down, and the like.
- the detection output from the attitude sensor 200 is taken into a central processing unit (CPU) 210 provided in a control unit for controlling each unit of the apparatus, and obtained in advance.
- the ratio of the installed installation state and the RGB output is compared with the memory 220 stored as a table, and based on the corresponding ratio, the red (R) solid light source, the green (G) solid light source, the blue color (blue) (via the drive control circuit 230) B)
- the input power of the solid light source may be controlled.
- Such an operation is realized, for example, when the central processing unit (CPU) 210 executes software stored in the memory 220 in advance.
- FIG. 17 shows an example of the table of RGB output ratios described above. That is, the projection display apparatus is arranged in various installation states in advance, and the red (R) solid light source, the green (G) solid light source, and the blue (B) solid light source based on the white balance in that state. Input power (ratio) is set in the memory 220 as a table.
- the central processing unit (CPU) 210 takes in a detection signal from the attitude sensor 200, determines a corresponding installation state, and selects a red (R) solid light source or green (G) according to the ratio of the corresponding RGB output.
- the central processing unit (CPU) 210 takes in a detection signal from the attitude sensor 200, determines a corresponding installation state, and selects a red (R) solid light source or green (G) according to the ratio of the corresponding RGB output.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
- each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
- Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
- Information such as programs, tables, and files that realize each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
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Abstract
Description
続いて、投写型映像表示装置の内部構造について、図4~図8を参照しながら、以下に詳細に説明する。
上述したように、入力電力に対する光出力は、赤色(R)固体光源の特性と、緑色(G)固体光源と青色(B)固体光源の特性とでは、互いに異なるものとなっている。
この特性は、上述したように、赤色(R)固体光源において最も著しい。そこのため、上記3種類の固体光源の中でも、特に、赤色(R)固体光源のジャンクション温度を効率的に冷却することが必要となる。
Claims (12)
- 反射ミラーに対して拡大投写される映像光を照射するための光源部と、前記光源部からの光と外部からの電気信号に基づいて前記拡大投写される映像光を生成する映像処理部と、前記映像処理部からの映像光を拡大投射する投写光学系を備えた投写型映像表示装置であって、
前記光源部を、少なくとも、固体発光装置からなる赤色(R)固体光源、緑色(G)固体光源、青色(B)固体光源により構成すると共に、当該各固体光源には、それぞれの冷却手段が設けられており、
前記各固体光源は、その発光特性や当該冷却手段の状態に基づいて、入力される駆動電力が制御されることを特徴とする投写型映像表示装置。 - 請求項1に記載した投写型映像表示装置において、前記赤色(R)固体光源に設けられた冷却手段の冷却特性が、他の固体光源に設けられた冷却手段の冷却特性よりも大きく設定したことを特徴とする投写型映像表示装置。
- 請求項2に記載した投写型映像表示装置において、前記冷却手段はヒートパイプであり、前記赤色(R)固体光源に設けられたヒートパイプの径が、他の固体光源に設けられたヒートパイプの径よりも大きく設定したことを特徴とする投写型映像表示装置。
- 請求項3に記載した投写型映像表示装置において、前記冷却手段は、更に、前記ヒートパイプの端部に取り付けられたヒートシンクを備えており、前記赤色(R)固体光源に設けられたヒートパイプの端部のヒートシンクは専用であり、他の固体光源に設けられたヒートパイプの端部のヒートシンクは共用であることを特徴とする投写型映像表示装置。
- 請求項1に記載した投写型映像表示装置において、前記赤色(R)固体光源の発光特性を、前記緑色(G)固体光源及び前記青色(B)固体光源の発光特性に一致するよう、前記赤色(R)固体光源への駆動電力を調整することを特徴とする投写型映像表示装置。
- 請求項1に記載した投写型映像表示装置において、前記赤色(R)固体光源に入力される駆動電力が所定の値に達した場合、当該駆動電力を所定の期間だけ低下させた後、再び、上昇されることを繰り返す制御を行うことを特徴とする投写型映像表示装置。
- 請求項1に記載した投写型映像表示装置において、更に、当該装置の設置状態を検知する姿勢センサが一部に取り付けられており、検出された当該装置の設置状態に基づいて前記赤色(R)固体光源、前記緑色(G)固体光源、前記青色(B)固体光源へ入力される駆動電力を制御することを特徴とする投写型映像表示装置。
- 反射ミラーに対して拡大投写される映像光を照射するための光源部と、前記光源部からの光と外部からの電気信号に基づいて前記拡大投写される映像光を生成する映像処理部と、前記映像処理部からの映像光を拡大投射する投写光学系を備えた投写型映像表示装置であって、
前記光源部は、固体発光装置からなる少なくとも赤色(R)固体光源、緑色(G)固体光源、青色(B)固体光源により構成すると共に、当該各固体光源には、それぞれの冷却手段が設けられており、
前記各固体光源に入力される駆動電力が投写型映像表示装置の姿勢に応じて制御されることを特徴とする投写型映像表示装置。 - 請求項8に記載した投写型映像表示装置に姿勢センサを設け、投写型映像表示装置の設置状態に応じた検出出力に基づいて、赤色(R)固体光源、緑色(G)固体光源、青色(B)固体光源の入力電力を制御することを特徴とした投写型映像表示装置。
- 請求項8に記載した投写型映像表示装置において、前記冷却手段はヒートパイプであり、前記赤色(R)固体光源に設けられたヒートパイプの径が、他の固体光源に設けられたヒートパイプの径よりも大きく設定したことを特徴とする投写型映像表示装置。
- 請求項10に記載した投写型映像表示装置において、前記冷却手段は、更に、前記ヒートパイプの端部に取り付けられたヒートシンクを備えており、前記赤色(R)固体光源に設けられたヒートパイプの端部のヒートシンクは専用であり、他の固体光源に設けられたヒートパイプの端部のヒートシンクは共用であることを特徴とする投写型映像表示装置。
- 請求項8に記載した投写型映像表示装置において、前記赤色(R)固体光源の発光特性を、前記緑色(G)固体光源及び前記青色(B)固体光源の発光特性に一致するよう、前記赤色(R)固体光源への駆動電力を調整することを特徴とする投写型映像表示装置。
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PCT/JP2014/062485 WO2015170405A1 (ja) | 2014-05-09 | 2014-05-09 | 投写型映像表示装置 |
US15/307,110 US10264227B2 (en) | 2014-05-09 | 2014-05-09 | Projection-type image display device |
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