WO2014103462A1 - Dispositif d'affichage d'images, procédé d'affichage d'images et programme - Google Patents

Dispositif d'affichage d'images, procédé d'affichage d'images et programme Download PDF

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Publication number
WO2014103462A1
WO2014103462A1 PCT/JP2013/076872 JP2013076872W WO2014103462A1 WO 2014103462 A1 WO2014103462 A1 WO 2014103462A1 JP 2013076872 W JP2013076872 W JP 2013076872W WO 2014103462 A1 WO2014103462 A1 WO 2014103462A1
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WIPO (PCT)
Prior art keywords
light source
laser
source unit
light
image
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PCT/JP2013/076872
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English (en)
Japanese (ja)
Inventor
大山　実
和己 岩田
篤 鶴見
達矢 中野
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株式会社Ｊｖｃケンウッド
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Publication of WO2014103462A1 publication Critical patent/WO2014103462A1/fr

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    • 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
    • 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
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • G02B26/0858—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD the reflecting means being moved or deformed by piezoelectric means
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • 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
    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/346—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on modulation of the reflection angle, e.g. micromirrors

Definitions

  • the present invention relates to an image display device, an image display method, and a program.
  • a laser scanning type image display device that displays an image on a projection surface by reflecting a laser beam projected from a light source with a scanning mirror and raster-scanning the projection surface with the reflected light beam is known.
  • This laser scanning type image display device reciprocally swings the scanning mirror left and right when drawing horizontal scanning lines, and swings the scanning mirror vertically according to the number of scanning lines constituting the image.
  • a MEMS (Micro Electro Mechanical Systems) mirror is used as the scanning mirror, so that a laser scanning type image display device is miniaturized, and various application products such as a head-up display and a head-mounted display have been developed. ing.
  • a light source of laser light typically a laser diode
  • offset current value a certain current value
  • the light quantity increases substantially in proportion to the applied current value above the offset current value.
  • Characteristics hereinafter referred to as IL characteristics.
  • the offset current value and the proportionality coefficient are known to vary with temperature. For example, heat generated when the laser diode outputs a laser, changes in the outside air temperature, and the like can cause temperature changes.
  • the IL characteristic of the laser diode changes in this way, the amount of light obtained even when the same current value is applied fluctuates. Therefore, the black level (minimum luminance) and white level (maximum luminance) (hereinafter, black and white) of the displayed image are changed. Level) gradually changes from the initial state, and a desired black-and-white level cannot be obtained, which adversely affects image contrast and the like.
  • Patent Document 1 as a technique for keeping the black and white level of a laser constant, a light detection unit disposed in an optical system from when the laser is reflected by a MEMS mirror to when it enters the user's pupil is a laser beam. Is configured to calculate the IL characteristic based on the detected light intensity and adjust the current supplied to the laser diode based on the calculation result.
  • Patent Document 2 laser light from a laser diode is received by a photodiode as a photodetector, and the laser diode is adjusted in accordance with increase / decrease in the amount of light so that the amount of light when the laser diode emits light is constant.
  • a configuration for feedback control of the driving current is disclosed.
  • Patent Document 1 has a problem that the structure of the system becomes complicated because the light detection unit is arranged in the optical system from when the laser is reflected by the MEMS mirror to when it enters the user's pupil. was there.
  • Patent Document 2 since the technique described in Patent Document 2 is based on a single laser diode, it is difficult to directly apply it to an image display apparatus having a plurality of laser diodes.
  • the present invention has been made to solve such a problem, and an object thereof is to provide an image display device, an image display method, and a program capable of realizing laser control according to temperature characteristics with a simple configuration.
  • the present invention is adapted to apply a current to a laser diode based on an image signal inputted to display an image and output a laser having a light amount corresponding to the current, and to a horizontal direction of the image. And resonantly oscillate, vibrate at a predetermined frequency corresponding to the vertical direction of the image, reflect the laser output from the light source unit, and raster scan the projection surface, whereby the image is projected onto the projection surface.
  • a light source unit that applies a current to a laser diode based on an image signal input to display an image and outputs a laser beam having a light amount corresponding to the current causes the lasers to have different currents.
  • a step of performing a test output a plurality of times depending on a value a detection unit for detecting a light amount of the laser output from the light source unit, a step of detecting a light amount in the plurality of test outputs and outputting the light amount to the light source unit,
  • An image including a step of calculating a parameter indicating a temperature characteristic of the laser diode based on a relationship between a current value used by each of the plurality of test outputs and a light amount corresponding to each of the current values.
  • the present invention provides a program for causing a computer to execute the above method.
  • an image display device an image display method, and a program capable of realizing laser control according to temperature characteristics with a simple configuration.
  • FIG. 1 is a diagram illustrating a configuration of an image display apparatus according to an embodiment.
  • FIG. 2 is a diagram illustrating a configuration of the image display apparatus according to the embodiment.
  • FIG. 3 is a diagram illustrating a scanning method in the image display apparatus according to the embodiment.
  • FIG. 4A is a diagram illustrating temperature characteristics of the laser diode in the image display apparatus according to the embodiment.
  • FIG. 4B is a diagram illustrating a temperature characteristic of the laser diode in the image display apparatus according to the embodiment.
  • FIG. 4C is a diagram illustrating a temperature characteristic of the laser diode in the image display apparatus according to the embodiment.
  • FIG. 4D is a diagram illustrating a temperature characteristic of the laser diode in the image display device according to the embodiment.
  • FIG. 5 is a diagram illustrating an operation of the image display apparatus according to the embodiment.
  • FIG. 6 is a diagram illustrating an effect of the image display device according to the embodiment.
  • the image display apparatus 100 includes a light source unit 110, a scanning mirror unit 120, and a detection unit 130.
  • the light source unit 110 drives the laser light source according to the input image signal, and outputs a laser beam to the scanning mirror unit 120 at the subsequent stage.
  • the light source unit 110 typically includes a microcomputer and performs the following series of processes.
  • the light source unit 110 inputs an original image signal via a video interface (not shown).
  • the light source unit 110 decodes the original image signal according to the image type. For example, when the original image signal is an analog image signal (component video signal), the original image signal is converted into digital image data composed of digital color signals of three colors (RGB) and a horizontal synchronization signal by decoding processing. And a synchronizing signal including a vertical synchronizing signal.
  • the light source unit 110 once writes the decoded image data in the buffer, and then reads out the image data line by line from the buffer at a timing suitable for the laser scanning type image display device, and outputs it to the subsequent stage. That is, the light source unit 110 reads out image data in accordance with a timing signal (dot clock, display period instruction signal) adjusted based on horizontal swing of a scanning mirror unit to be described later.
  • a timing signal dot clock, display period instruction signal
  • the light source unit 110 includes a D / A conversion unit (not shown), and applies a drive current to the laser light source according to the three colors (RGB) constituting the read image data to obtain a laser light source of three colors (RGB). It emits light with the brightness of.
  • RGB three colors
  • the light source unit 110 includes a red laser diode 111R, a blue laser diode 111B, and a green laser diode 111G in order to obtain three colors of RGB as a laser light source.
  • Each laser diode is driven by a red driver, a green driver, and a blue driver (not shown).
  • Each pixel data constituting the image data has color information composed of three colors of R (red), G (green), and B (blue) for each pixel.
  • the red driver, the green driver, and the blue driver apply current to the laser diode 111 of each color according to the luminance information of each color of each pixel. Note that the laser does not emit light when drawing black. For this reason, the laser scanning image display device can suppress power consumption as compared with a liquid crystal display or the like in which a current must always be applied to pixels.
  • the light source unit 110 further includes mirrors 112R, 112G, and 112B.
  • Each of the mirrors 112 is a dichroic mirror that transmits or reflects a color having a predetermined wavelength.
  • the dichroic mirror has a property of substantially reflecting light incident on one surface and substantially transmitting light incident on the other surface.
  • the laser beams of three colors are incident on the scanning mirror unit 120 at a predetermined angle as a light beam combined on one axis.
  • a condensing lens (not shown) may be appropriately disposed on the optical path to condense the laser light.
  • the scanning mirror unit 120 is a so-called MEMS device, and includes a mirror driven by a piezoelectric element and a control unit that drives the mirror by applying a current to the piezoelectric element at a predetermined timing.
  • the mirror has two swing axes orthogonal to each other, and the image light beam is raster-scanned by swinging the mirror in two directions.
  • the mirror swing axis corresponding to the horizontal scan (main scanning direction) of the image is the H-axis
  • the mirror swing axis corresponding to the vertical scan (sub-scanning direction) of the image is shown. This will be described as the V axis.
  • the oscillation of the mirror in the H-axis direction is resonance oscillation.
  • the swing in the V-axis direction that is, the sub-scanning direction is non-resonant driving.
  • the control unit adjusts the vibration period in the V-axis direction according to the frame rate of the image signal.
  • Fig. 3 shows the concept of raster scan of an image by mirror swing.
  • the oscillation of the mirror in the H-axis direction is a resonance oscillation and a sine wave. Therefore, in the folded portion corresponding to the left and right edges of the image, the movement of the mirror is slow, and there are events that the pixel interval is clogged and the luminance is increased. Therefore, when an image is actually displayed, a certain width (blanking region) at the left and right ends of the scan range is cut. That is, in the blanking area, laser light emission for drawing an image is not performed and a black belt-like display area is formed. A blanking region is similarly provided in the vertical direction.
  • the detection unit 130 is typically a color sensor.
  • the color sensor is typically a photodiode provided with a dye-based filter, and the amount of light can be selectively detected for each of R (red), G (green), and B (blue) with one sensor.
  • the detection unit 130 is provided in the vicinity of the light source unit 110. Specifically, it is preferably provided in the vicinity of the optical path after the mirror 112G where the three colors of laser beams are combined.
  • the detection unit 130 is disposed on the position facing the green laser diode 111G via the mirror 112G, in other words, on the extension of the initial optical path of the green laser. Since the dichroic mirror transmits a part of light also on the reflection surface and reflects a part of light on the transmission surface, the dichroic mirror is arranged at such a position, so that R (red), G (green), B All the laser outputs of the three colors (blue) can be detected by one detection unit 130.
  • FIGS. 4A to 4D are graphs showing the relationship (IL characteristics) between the drive current value applied to the laser diode and the amount of laser light output from the laser diode.
  • the laser diode starts laser output with a constant current value (offset current value) as a threshold value. That is, the laser diode hardly emits light at a drive current less than the offset current value.
  • the light source unit 110 may apply the offset current value and the current value corresponding to the luminance signal of each RGB color included in the image data to each of the RGB laser diodes.
  • Tc indicates the laser case temperature.
  • the offset current value and the proportionality coefficient the slope of the graph
  • the IL characteristic depends on the temperature of the laser diode. You can see that it fluctuates. That is, as the temperature increases, the offset current value increases and the proportionality factor decreases. Further, it can be seen that the IL characteristic varies depending on the color of the laser diode. Further, the IL characteristics may vary depending on individual differences of laser diodes.
  • the image display apparatus 100 is typically used while being mounted on the vehicle. In this case, the temperature range of the use environment becomes very wide and the temperature change is severe, and therefore, the fluctuation of the IL characteristic according to the temperature change is , Has a noticeable effect on the image.
  • the light source unit 110 needs to adjust the drive current value to be applied in order to obtain a desired luminance according to the temperature. In other words, it is necessary to strictly set the black and white level while always following the IL characteristics that change according to the temperature. Furthermore, if individual differences of laser diodes are taken into account, adjustments according to individual differences are also necessary. This is very important because, for example, when performing image display at night, gradation representation within a very narrow luminance range that does not hinder the visibility of the dark external environment is required.
  • S101 Light emission a plurality of times by changing a drive current value
  • the light source unit 110 performs test light emission for obtaining an IL characteristic irrespective of an input image signal.
  • lasers having different light amounts are output a plurality of times, that is, at least twice.
  • the light source unit 110 performs the test light emission in the blanking period corresponding to the upper side of the image in FIG. Note that the test light emission may be performed during the blanking periods on the left side, the right side, and the lower side of the image.
  • test light emission it is possible to perform test light emission so as to be superimposed on the image, but in this case, the test light emission becomes noise on the image and is visible to the user.
  • the output timing of each color of RGB can be arbitrarily controlled without worrying about noise generation.
  • the RGB lasers need not be output at the same time, and may be output and detected one by one. Thereby, all the colors can be measured by one detection unit 130. Further, in view of the speed of the microcontroller or the like constituting the light source unit 110 and the detection unit 130, a plurality of RGB colors may be output and detected in one line scanning in the horizontal direction. May be output and detected separately.
  • the detection unit 130 detects the light amount of the laser output from the laser diode 111.
  • the detection unit 130 outputs the detected light amount value to the light source unit 110. That is, the amount of laser light output from the light source unit 110 is fed back to the light source unit 110.
  • the light source unit 110 receives the amount of light detected by the detection unit 130. This feedback is performed every time the light source unit 110 performs the test light emission. At least two sets of drive voltage and light quantity are obtained by feedback at least twice. As described above, the IL characteristic is substantially linear with the offset current value as an intercept. Therefore, if a linear function of the drive voltage and the light amount is obtained using the above two sets, the IL characteristic is obtained. When performing test light emission a plurality of times, for example, the IL characteristic can be obtained by the same method as that for obtaining an approximate line of a plurality of points on the graph. In general, the greater the number of test emissions, the higher the accuracy of the IL characteristics.
  • the IL characteristic is assumed to be substantially linear. This is because at least the black level (minimum luminance) and the white level (maximum luminance) are appropriately set. As shown in FIGS. 4A to 4D, since the IL characteristic is actually a curve, the black level and the white level can be obtained by approximating the curve using a plurality of sets of drive voltages and light amounts. Not only that, but also the gray gradation between them could be adjusted accurately.
  • the method using a curve requires a larger amount of calculation than the method using a straight line. In other words, the method using a straight line can perform feedback control many times compared to the method using a curve if the calculation amount is the same. In the present embodiment, in view of the fact that safety is always required for in-vehicle use, a method is adopted in which the IL characteristic is regarded as a straight line.
  • S104 Adjust black and white level based on IL characteristic
  • the light source unit 110 adjusts the black and white level based on the IL characteristic calculated in S103. That is, the drive power value to be applied to the laser diode 111 to obtain a desired luminance is obtained by the linear function calculated in S103, and the laser diode 111 is driven with the obtained drive power value.
  • FIG. 6 shows the effect of this embodiment.
  • double-headed arrows drawn at the bottom of the graph indicate timings at which the light source unit 110 performs test light emission (“test light emission”) and stops (“no test light emission”). ing.
  • the data plotted in the upper part of the graph indicates the change over time of the light quantity of the laser diode 111, and the light quantity is larger as it goes downward. It can be seen that during the period in which the test light emission is intermittently performed, the black and white level feedback control is performed, and in particular, the white level is always kept substantially constant.
  • the light source unit 110 performs test light emission a plurality of times, and the detection unit 130 detects this and feeds it back to the light source unit 110, whereby the light source unit 110 optimally adjusts the black and white level. Can do.
  • the laser beams of all colors can be detected by one detection unit 130, low cost and space saving can be realized.
  • the light source unit 110 further includes a temperature sensor that measures the temperature of the laser diode 111.
  • the frequency is a predetermined frequency, and when the temperature change is lower than the threshold value, The feedback control may be performed less frequently.
  • Feedback control may be performed in a predetermined situation where a sudden temperature change is predicted, such as when the engine of a vehicle on which the image display device 100 is mounted, a predetermined frequency over a certain period of time, and thereafter less frequently than the above-mentioned frequency.
  • the light source unit 110 may further include a temperature sensor that measures the temperature of the laser diode 111, and may change the positions of two points to be acquired in order to obtain the IL characteristics according to the temperature change. That is, the drive current value applied during the test light emission can be dynamically set according to the temperature. As shown in FIGS. 4A to 4D, the offset current value (intercept) increases as the temperature increases. Therefore, in order to obtain more accurate IL characteristics, it is preferable to increase the drive current value applied during test light emission as the temperature increases. More specifically, it is preferable that the first test light emission has a drive current value that is equal to or higher than the offset current value expected at the temperature at the time of the test light emission and is as close as possible to the offset current value.
  • the light source unit 110 can hold a standard offset current value at a predetermined temperature in advance.
  • the second time is preferably set to a sufficiently larger drive current value than the first time.
  • the light source unit 110 holds an IL characteristic at a predetermined temperature, for example, 25 degrees as a reference value for each laser diode 111, and a standard reference value, for example, 25, is used when adjusting the black and white level. It is also possible to consider a difference from the IL characteristic in degree. Thereby, the individual variation of the black and white level can be adjusted.
  • the present invention has been mainly described as a hardware configuration.
  • a CPU Central Processing Unit
  • the computer program can be stored using various types of non-transitory computer readable media and supplied to the computer.
  • Non-transitory computer readable media include various types of tangible storage media.
  • non-transitory computer-readable media examples include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random access memory)).
  • the program may be supplied to the computer by various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • the image display device, the image display method, and the program according to the present invention are useful when laser control is performed according to temperature characteristics, and in particular, laser control according to temperature characteristics is realized with a simple configuration. Suitable for you.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Semiconductor Lasers (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un dispositif (100) d'affichage d'images comportant: une unité (110) de source lumineuse qui, sur la base d'un signal d'image introduit afin d'afficher une image, applique un courant à une diode laser et émet une lumière laser dont le volume correspond au courant; une unité (120) de miroir de balayage qui affiche une image sur une surface de projection en réfléchissant la lumière laser émise par l'unité (110) de source lumineuse, effectuant ainsi un balayage de trame de la surface de projection; et une unité (130) de détection servant à détecter le volume de la lumière laser émise par l'unité (110) de source lumineuse. L'unité (110) de source lumineuse effectue une émission d'essai de la lumière laser une pluralité de fois, en utilisant à chaque fois une valeur de courant différente. L'unité (130) de détection détecte chaque volume de lumière de la pluralité d'émissions d'essai et envoie ces résultats à l'unité (110) de source lumineuse. L'unité (110) de source lumineuse calcule un paramètre indiquant les caractéristiques de température de la diode laser en se basant sur la relation entre les valeurs de courant respectivement utilisées lors de la pluralité d'émissions d'essai et les volumes de lumière correspondant respectivement auxdites valeurs de courant.
PCT/JP2013/076872 2012-12-28 2013-10-02 Dispositif d'affichage d'images, procédé d'affichage d'images et programme WO2014103462A1 (fr)

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JP2012-288544 2012-12-28
JP2012288544A JP2014130256A (ja) 2012-12-28 2012-12-28 画像表示装置、画像表示方法及びプログラム

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JP2019021652A (ja) * 2017-07-11 2019-02-07 パナソニックＩｐマネジメント株式会社 光源装置および画像表示装置
WO2020137559A1 (fr) * 2018-12-28 2020-07-02 浜松ホトニクス株式会社 Unité de source de lumière, dispositif d'affichage à projection et procédé de fabrication d'unité source de lumière

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JP6613984B2 (ja) 2015-09-03 2019-12-04 株式会社Ｊｖｃケンウッド 描画装置及び描画方法
JP6582943B2 (ja) * 2015-12-04 2019-10-02 株式会社Ｊｖｃケンウッド 描画装置及び描画方法
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