WO2012081308A1 - プロジェクタおよび制御方法 - Google Patents
プロジェクタおよび制御方法 Download PDFInfo
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- WO2012081308A1 WO2012081308A1 PCT/JP2011/074160 JP2011074160W WO2012081308A1 WO 2012081308 A1 WO2012081308 A1 WO 2012081308A1 JP 2011074160 W JP2011074160 W JP 2011074160W WO 2012081308 A1 WO2012081308 A1 WO 2012081308A1
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- 238000000034 method Methods 0.000 title claims description 9
- 238000001514 detection method Methods 0.000 claims abstract description 79
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000004364 calculation method Methods 0.000 description 8
- 235000019557 luminance Nutrition 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
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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
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
- G09G3/025—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen with scanning or deflecting the beams in two directions or dimensions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
Definitions
- the present invention relates to a projector that displays an image by scanning a screen with a light beam.
- a scanning projector that displays an image by scanning a fluorescent screen with a light beam has attracted attention.
- a resonant scanning element such as a galvanometer mirror is often used as a scanning means for scanning the fluorescent screen.
- Resonant scanning elements have the advantage of being able to perform high-speed scanning, but on the other hand, since the scanning speed and scanning amplitude are likely to change depending on the ambient temperature, the light beam is directed to an appropriate incident position on the screen. It is not easy to enter.
- Patent Document 1 discloses a scanning beam display system capable of adjusting the incident position of a light beam on a screen.
- a plurality of fluorescent stripes are periodically arranged, and servo reference marks that reflect the light beam are arranged between the fluorescent stripes.
- the scanning beam display system emits a light beam composed of a plurality of light pulses from a light source, and scans the fluorescent screen in the direction perpendicular to the fluorescent stripe with the light beam, thereby exciting the phosphors of each fluorescent stripe. To display the image.
- the scanning beam display system changes the incident position of the light pulse on the screen for each scan by changing the light emission timing of the light source for each scan.
- the incident position of the light pulse changes, the amount of light incident on the servo reference mark changes, so the amplitude of the feedback light from the servo reference mark also changes.
- the scanning beam display system detects the change in the amplitude of the feedback light, and adjusts the light emission timing of the light source according to the detection result, so that the light pulse is incident on the fluorescent stripe. Adjust.
- the light emission timing of the light source is adjusted, but the light emission period of the light source is not adjusted, and light pulses having the same pulse width are emitted even when the scanning speed changes. For this reason, the irradiation region of the light pulse becomes larger than necessary, and the irradiation region on the screen due to the light pulse protrudes from the fluorescent stripe, and there is a problem that the light utilization efficiency is reduced.
- An object of the present invention is to provide a projector and a control method capable of solving the above-described problem that the light use efficiency is lowered.
- the projector includes a screen in which color stripes that generate visible light according to incident light are periodically arranged, a light source that emits a light beam, and the color stripes on the screen are arranged with the light beam.
- a projection unit that scans a region, a detection unit that detects feedback light from the screen with respect to the light beam, and a light emission timing and a light emission period of the light source based on a detection result of the detection unit, And a controller that emits the light beam from the light source so that a light pulse is incident on the color stripe.
- control method includes a screen in which color stripes that generate visible light according to incident light are periodically arranged, a light source that emits a light beam, and the light beam, the color stripes on the screen. And a projection unit that scans a region where the light source is disposed, and detects a feedback light from the screen to the light beam, and based on the detection result, the light emission timing and light emission of the light source The light beam is emitted from the light source so that a light pulse is incident on each color stripe by adjusting the period.
- FIG. 1 is a diagram showing a projector according to a first embodiment of the present invention.
- a projector 1 shown in FIG. 1 is a scanning rear projector that displays an image by scanning the back surface of a screen with a laser beam that is a light beam, and includes a screen 10, a laser light source unit 11, a laser projection unit 12, A light detection unit 13 and a control unit 14 are provided.
- color stripes that generate visible light according to incident light are periodically arranged in the in-plane direction, and black stripes that block incident light are arranged between the color stripes.
- FIG. 2 is a diagram showing a specific configuration of a part of the screen 10. As shown in FIG. 2, on the screen 10, color stripes 21 are periodically arranged, and black stripes 22 are arranged between the color stripes.
- the color stripe 21 is a region formed of a phosphor, and is a region that generates fluorescence in response to incident light and emits it to the front surface of the screen. It is assumed that the fluorescence wavelength is in the visible light region.
- the color stripes 21A, 21B and 21C which are three sub-color stripes having different fluorescence wavelengths, are arranged in a specific direction in this order as the color stripe 21.
- the color stripe 21A generates red fluorescence
- the color stripe 21B generates green fluorescence
- the color stripe 21C generates blue fluorescence.
- the color stripes 21 are arranged in the horizontal direction so that the horizontal scanning direction by the laser projection unit 12 intersects the longitudinal direction of the color stripes 21.
- the color stripe 21 may be formed of a light diffusing material instead of the phosphor. In this case, the color stripe 21 generates visible light for display by diffusing laser light, and emits it to the front surface of the screen 10.
- the black stripe 22 is a region that shields the laser beam from being transmitted through the front surface of the screen 10 by absorbing or reflecting the laser beam.
- the reflection includes diffuse reflection and retroreflection.
- At least one of the color stripe 21 and the black stripe 22 reflects the laser light (including diffuse reflection or retroreflection) or converts the laser light into light of another wavelength and diffuses the reflected light or diffused light. At least a part of the light is configured to be guided to the light detection unit 13 as feedback light.
- the light of other wavelengths is, for example, fluorescence generated in the color stripe 21.
- the laser light source unit 11 is a light source composed of a semiconductor laser element or a solid-state laser element, and emits laser light.
- the laser projection unit 12 displays an image on the screen 10 by scanning the area where the color stripes are arranged on the back surface of the screen 10 with the laser light emitted from the LD light source unit 11.
- the laser projection unit 12 only needs to scan the screen 10 at least in the horizontal direction, and drawing of the image in the vertical direction may be performed by a one-dimensional SLM (spatial light modulator) or the like.
- a scanning means for scanning the screen 10 with laser light a resonant light scanning element such as a galvanometer mirror is desirable.
- the light detection unit 13 is a detection unit that includes a photoelectric conversion device and detects feedback light from the screen 10 with respect to the laser light projected on the screen 10.
- the photoelectric conversion device include a PD (photodiode) such as an APD (avalanche photodiode).
- the control unit 14 performs calibration for adjusting the image display area on the screen 10 and the light emission timing of the laser light source unit 11. For example, the control unit 14 adjusts the light emission timing and the light emission period of the laser light source unit 11 based on the detection result of the light detection unit 13 so that the light pulse is incident on each color stripe 21 on the screen 10.
- control unit 14 scans according to the input video signal while emitting the laser light from the laser light source unit 11 so that the light pulse is incident on each color stripe 21 according to the result of the calibration.
- the laser projection unit 12 is executed to display an image corresponding to the input video signal on the screen 10.
- FIG. 3 is a flowchart for explaining the operation of the projector 1.
- the control unit 14 executes calibration.
- the projector 1 includes a power-on switch (not shown), and when the switch is turned on, the control unit 14 determines that the projector 1 is activated and executes calibration.
- control unit 14 adjusts the scanning amplitude of the laser projection unit 12 to adjust the image display area (step S301).
- control unit 14 performs phase matching for synchronizing the horizontal scanning frequency of the laser projection unit 12 and the horizontal synchronization signal of the input video signal (step S302).
- control unit 14 causes the laser light source unit 11 to emit continuous light as laser light, and causes the laser projection unit 12 to scan the screen 10 in the horizontal scanning direction, based on the detection result of the light detection unit 13 in the scanning. Then, the irradiation timing adjustment for generating the control information indicating the emission timing and the pulse width of each light pulse incident on each color stripe 21 is performed, and the calibration is completed (step S303).
- the control unit 14 uses the laser light source unit 11 and the laser projection unit 12 to adjust the light emission timing and the light emission period of the laser light source unit 11 based on the control information generated in step S303, and according to the input video signal. Scanning is performed, and an image corresponding to the input video signal is displayed on the screen 10 (step S304). Note that the luminance of the display image can be changed by adjusting the amplitude of the light pulse.
- the control unit 14 scans the screen 10 in the horizontal scanning direction with continuous light using the laser light source unit 11 and the laser projection unit 12, and based on the detection result by the light detection unit 13 in the scanning.
- the correlation between the emission timing and the pulse width of the display light pulse that is the light pulse incident on each color stripe 21 is obtained.
- FIG. 4 is a diagram for explaining a first calculation method for obtaining the correlation between the emission timing and the pulse width of the display light pulse.
- the light detection unit 13 detects sub-feedback light that is a plurality of light pulses from each color stripe 21 as feedback light from the screen 10.
- the detection timing (detection start time) to t i of the sub-feedback light from the i-th color stripe 21 in the horizontal scanning direction, and the detection width and d i.
- the pulse width of each display light pulse incident on each color stripe 21 is the same value W, and the emission timing of the display light pulse incident on the i-th color stripe 21 is a i .
- the control unit 14 determines the mutual relationship between the emission timing of the display light pulse and the pulse width.
- FIG. 5 is a diagram for explaining a second calculation method for obtaining the correlation between the emission timing of the display light pulse and the pulse width.
- the light detection unit 13 detects a plurality of subfield lights that are light pulses from a plurality of predetermined detection stripes of the color stripe 21 as feedback light.
- the detection timing of the sub-feedback light from the i-th detection stripe in the horizontal scanning direction by the light detection unit 13 is t i , and the detection width is d i .
- the number of target color stripes that are color stripes from the i-th detection stripe to the color stripe before the next detection stripe is n
- the pulse width of the display light pulse incident on each color stripe 21 is ,
- the same value W, and the emission timing of the display light pulse incident on the j-th target color stripe counted from the i-th detection stripe is aj i .
- control unit 14 determines the correlation between the emission timing of the display light pulse and the pulse width
- FIG. 6 is a diagram for explaining a third calculation method for obtaining the correlation between the emission timing of the display light pulse and the pulse width.
- the light detection unit 13 detects a plurality of sub-feedback lights that are light pulses from each black stripe 22 as feedback light.
- the detection timing of the sub-feedback light from the i-th black stripe in the horizontal scanning direction by the light detection unit 13 is t i
- the detection width is d i
- the pulse width of each display light pulses incident on each color stripe 21 the same value is W
- the control unit 14 determines the mutual relationship between the emission timing of the display light pulse and the pulse width.
- control unit 14 When the control unit 14 obtains the mutual relationship between the emission timing and the pulse width of the display light pulse by the above first to third calculation methods, it is displayed on each color stripe as shown in FIGS. An optical pulse can be incident.
- the display light pulse can be contained in the color stripe. Therefore, if the pulse width W is set sufficiently small in advance, the control unit 14 can suppress the display light pulse from protruding from the desired color stripe and entering the other color stripe or black stripe. , Light utilization efficiency can be increased.
- the control unit 14 when the control unit 14 obtains the mutual relationship between the emission timing and the pulse width of the display light pulse, the control unit 14 further sets the pulse width of each display light pulse in order to optimize the pulse width of the display light pulse. Ask.
- control unit 14 uses the laser light source unit 11 and the laser projection unit 12 to scan the screen 10 in the horizontal scanning direction with a pulse train composed of a plurality of adjustment light pulses having the above-described correlations, and performs light detection in the scanning. Based on the detection result of the unit 13, the pulse width of each display light pulse is determined.
- control unit 14 repeatedly scans the screen 10 in the horizontal scanning direction with the above pulse train while gradually increasing the pulse width of the light control light pulse in the pulse train, and the detection result in each scan Based on the above, the pulse width of the display light pulse is determined. It is assumed that the light control light pulses in the pulse train in each scan have the same pulse width.
- the control unit 14 determines that the adjustment light pulse at the current scanning time is not increased from the detection period at the previous scanning time among the plurality of detection time periods of each sub feedback light.
- the pulse width is determined as the pulse width of the display light pulse.
- the pulse width of the adjustment light pulse when any of the light control light pulses protrudes from the color stripe 21 is determined as the pulse width of the display light pulse.
- the light quantity of the light pulse incident on can be maximized. For this reason, it becomes possible to reduce the utilization efficiency of a laser beam, maximizing the brightness
- the control unit 14 obtains the sum of the luminances of the sub-feedback lights, and the increase rate is linear for each scan of the sum of the luminances. If not, the pulse width of the adjustment optical pulse during the current scan may be determined as the pulse width of the display optical pulse.
- the pulse width of the adjustment light pulse when the luminance increase rate becomes low is the pulse width of the display light pulse
- the laser light utilization efficiency is maximized and the highest utilization efficiency is achieved.
- the brightness of the display image can be maximized.
- control unit 14 determines the maximum value of the moving speed of the incident position of the laser beam on the screen 10 based on the detection result in the same scanning as when the correlation between the emission timing and the pulse width is obtained. May be obtained, and the pulse width of the display light pulse may be obtained based on the maximum movement speed V.
- control unit 14 determines the display optical pulse based on the mutual relationship and the pulse width.
- the control information indicating the emission timing and the pulse width is generated. For example, the control unit 14 substitutes the obtained pulse width into the correlation, obtains the emission timing, and generates control information indicating the obtained pulse width and the emission timing.
- control unit 14 When generating the control information, the control unit 14 holds the control information or records the control information in a memory (not shown) outside the control unit 14.
- FIG. 8 is a diagram showing a state in which the screen 10 is scanned with laser light in the projector 1 configured as described above.
- the laser scanning unit 30 includes the laser light source unit 11, the laser projection unit 12, the light detection unit 13, and the control unit 14 illustrated in FIG. 1.
- the image drawing start position is the upper left of the display area 31.
- the laser light projected from the laser scanning unit 30 moves on the screen 10 in a direction intersecting the longitudinal direction of the color stripe 21.
- the incident position of the laser beam on the screen 10 moves from the left end to the right end within the display area as shown by the locus 32, and when it reaches the right end, it is folded and moved to the left end. Then, the incident position of the laser beam is folded at the left end and moves again to the right end.
- Such scanning is continuously performed from the upper side to the lower side.
- the longitudinal direction of the color stripe 21 is in the vertical direction, and the laser scanning unit 30 scans the screen 10 in the horizontal direction so that the incident position of the laser beam is the color stripe 21. It is moved in a direction intersecting with the longitudinal direction.
- the longitudinal direction of the color stripe 21 is oriented in the horizontal direction, and the laser scanning unit 30 scans the screen 10 in the vertical direction so that the incident position of the laser light is the longitudinal direction of the color stripe 21. You may move to the direction which crosses.
- the light emission timing and the light emission period of the laser light source unit 11 are adjusted based on the detection result of the light detection unit 13 so that the light pulse is incident on each color stripe. Therefore, even if the scanning speed of the projector 1 changes, it becomes possible to store the light pulse in the color stripe 21 and to increase the utilization efficiency of the laser light from the laser light source unit 11.
- control unit 14 adjusts the emission timing and the pulse width of the display light pulse while the calibration is completed and scanning according to the input video signal is performed.
- control unit 14 causes the laser light source unit 11 and the laser projection unit 12 to perform scanning according to the input video signal using a pulse train including display light pulses.
- the control unit 14 obtains the maximum movement speed V of the laser light on the screen 10 based on the detection result of the light detection unit 13 at the time of scanning, and corrects the control information based on the maximum movement speed V. .
- the control unit 14 obtains the pulse width and emission timing of the display light pulse from the movement maximum velocity V from the movement maximum velocity V, and sets the pulse width and emission timing indicated by the control information to the obtained pulse width and emission timing. to correct.
- the timing for correcting the control information may be every frame of the display image, every predetermined frame, or every horizontal scan. Further, the method for obtaining the pulse width and the emission timing of the display light pulse from the maximum moving speed V may be the same method as described in the first embodiment.
- the control information is corrected during scanning according to the input video signal, even if the scanning speed changes during scanning according to the input video signal, the brightness of the display image is optimized. Can be.
- the projector 1 may be applied to projectors 1-1 to 1-9 of a multi-projector system as shown in FIG.
- the multi-projector system displays the projected images of the projectors 1-1 to 1-9 side by side on a screen to form a large display image.
- the number of projectors in the multi-projector system is only nine in FIG.
- the projector 1 When the projector 1 is applied to a multi-projector system, the projector 1 does not need to be provided with a special mark for generating feedback light or the like other than the display area.
- a seamless multi-projector system can be configured.
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Abstract
Description
レーザ光の利用効率が最も高くし、その利用効率において、表示画像の輝度を最大にすることができる。
Claims (14)
- 入射光に応じた可視光を発生させるカラーストライプが周期的に配置されたスクリーンと、
光ビームを出射する光源と、
前記光ビームで、前記スクリーンにおける前記カラーストライプが配置された領域を走査する投射部と、
前記光ビームに対する前記スクリーンからのフィードバック光を検出する検出部と、
前記検出部の検出結果に基づいて、前記光源の発光タイミングおよび発光期間を調節して、各カラーストライプ内に光パルスが入射されるように前記光ビームを前記光源から出射させる制御部と、を有するプロジェクタ。 - 請求項1に記載のプロジェクタにおいて、
前記制御部は、前記光源から前記光ビームとして連続光を出射させるとともに、前記投射部に前記スクリーンを各カラーストライプと交差する方向に走査させ、当該走査における前記検出結果に基づいて、各光パルスのそれぞれの出射タイミングおよびパルス幅を示す制御情報を生成し、当該制御情報に応じて前記光源の発光タイミングおよび発光期間を調節する、プロジェクタ。 - 請求項2に記載のプロジェクタにおいて、
前記制御部は、前記検出結果に基づいて、各光パルスの出射タイミングおよびパルス幅の関係と、各光パルスのパルス幅とを求め、当該求めた関係およびパルス幅に応じて前記制御情報を生成する、プロジェクタ。 - 請求項3に記載のプロジェクタにおいて、
前記検出部は、前記フィードバック光として、前記複数のカラーストライプのうちの予め定められた複数の検出用ストライプからの複数のサブフィードバック光を検出し、
前記制御部は、前記方向のi番目の検出用ストライプからのフィードバック光の検出タイミングをti、当該フィードバック光の検出幅をdi、前記i番目の検出用ストライプから、次の検出用ストライプの手前のカラーストライプまでにある対象カラーストライプの数をn、前記i番目の検出用ストライプから数えてj番目にある対象カラーストライプに入射する光パルスの出射タイミングをaji、各光パルスのパルス幅をWとすると、前記関係を、
と求める、プロジェクタ。 - 請求項5に記載のプロジェクタにおいて、
前記スクリーンは、前記カラーストライプとして、前記可視光の波長がそれぞれ異なる複数のサブカラーストライプが所定の順番で周期的に配置され、
前記検出用ストライプは、前記サブカラーストライプのうち、所定の波長の可視光を発生するサブカラーストライプである、プロジェクタ。 - 請求項3ないし7のいずれか1項に記載のプロジェクタにおいて、
前記制御部は、前記検出結果に基づいて、前記スクリーンにおける前記光ビームの入射位置の移動最大速度Vを求め、各カラーストライプの幅をR、各ブラックストライプの幅をQ、前記光ビームのビーム径をDとしたき、各光パルスのパルス幅Wを、Q>Dの場合、W=(R+2D)/Vと求め、Q<Dの場合、W=(R+2Q-D)/Vと求める、プロジェクタ。 - 請求項3ないし7のいずれか1項に記載のプロジェクタにおいて、
前記制御部は、前記スクリーンにおける前記光ビームの入射位置の移動最大速度Vを求め、各カラーストライプの幅をR、前記光ビームのビーム径をDとしたき、各光パルスのパルス幅Wを(R-D)/Vと求める、プロジェクタ。 - 請求項3ないし7のいずれか1項に記載のプロジェクタにおいて、
前記制御部は、前記光源および前記投射部を用いて、前記関係を有する複数の調整用光パルスで、各調整用光パルスのパルス幅を増加させながら前記方向に繰り返し走査させ、各走査における前記検出部の検出結果に基づいて、各光パルスのパルス幅を求める、プロジェクタ。 - 請求項10に記載のプロジェクタにおいて、
前記検出部は、前記各走査において、前記フィードバック光として、各カラーストライプからの複数の第2サブフィードバック光を検出し、
前記制御部は、各第2サブフィードバック光の検出期間の中で、前回の走査における検出期間より増加していないものがあった場合、現在の走査における各調整用光パルスのパルス幅を各光パルスのパルス幅として求める、プロジェクタ。 - 請求項10に記載のプロジェクタにおいて、
前記検出部は、前記各走査において、前記フィードバック光として、各カラーストライプからの複数の第2サブフィードバック光を検出し、
前記制御部は、走査ごとの各第2サブフィードバック光の輝度の総和の増加率が線形とならない場合、現在の走査における各調整用光パルスのパルス幅を各光パルスのパルス幅として求める、プロジェクタ。 - 請求項2ないし12のいずれか1項に記載のプロジェクタにおいて、
前記制御部は、前記光源の発光タイミングおよび発光期間を調節しつつ、入力映像信号に応じた走査を前記投射部に実行させ、当該走査における前記検出結果に基づいて、前記制御情報を補正する、プロジェクタ。 - 入射光に応じた可視光を発生させるカラーストライプが周期的に配置されたスクリーンと、光ビームを出射する光源と、前記光ビームで、前記スクリーンにおける前記カラーストライプが配置された領域を走査する投射部と、を有するプロジェクタの制御方法であって、
前記光ビームに対する前記スクリーンからのフィードバック光を検出し、
当該検出結果に基づいて、前記光源の発光タイミングおよび発光期間を調節して、各カラーストライプ内に光パルスが入射されるように前記光ビームを前記光源から出射させる、制御方法。
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WO2014128865A1 (ja) * | 2013-02-20 | 2014-08-28 | パイオニア株式会社 | 画像表示装置 |
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- 2011-10-20 JP JP2012548693A patent/JPWO2012081308A1/ja active Pending
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JPWO2014128865A1 (ja) * | 2013-02-20 | 2017-02-02 | パイオニア株式会社 | 画像表示装置 |
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CN103262145A (zh) | 2013-08-21 |
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