EP2443836A1 - Dispositif d'affichage d'image, et procédé de mise en uvre correspondant - Google Patents

Dispositif d'affichage d'image, et procédé de mise en uvre correspondant

Info

Publication number
EP2443836A1
EP2443836A1 EP10726430A EP10726430A EP2443836A1 EP 2443836 A1 EP2443836 A1 EP 2443836A1 EP 10726430 A EP10726430 A EP 10726430A EP 10726430 A EP10726430 A EP 10726430A EP 2443836 A1 EP2443836 A1 EP 2443836A1
Authority
EP
European Patent Office
Prior art keywords
light sources
color
display device
malfunction
image display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10726430A
Other languages
German (de)
English (en)
Inventor
Hans-Günther NUSSECK
Heiko Schaich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eye Abwicklungs GmbH
Original Assignee
Eyevis Gesellschaft fuer Projektions und Grossbildtechnik mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eyevis Gesellschaft fuer Projektions und Grossbildtechnik mbH filed Critical Eyevis Gesellschaft fuer Projektions und Grossbildtechnik mbH
Publication of EP2443836A1 publication Critical patent/EP2443836A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • 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
    • H04N9/3164—Modulator illumination systems using multiple light sources
    • 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]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback
    • 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
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • 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

Definitions

  • Image display device and corresponding operating method
  • the invention relates to an operating method for an image display device, in particular for a digital LED projector. Furthermore, the invention comprises a corresponding operating method.
  • US Pat. No. 6,683,657 B1 discloses a digital projector which has a micromirror field as an imaging element, which is also referred to as a digital mirror device (DMD).
  • the light source used here is a conventional lamp which emits light over a broadband range.
  • the desired colors are generated by a rotating color wheel, which in each case transmits a specific spectral range of the light emitted by the lamp to the micromirror field, from where the light is then projected onto a projection screen by means of projection optics.
  • the lamps used here have only a limited life and can fail prematurely within the projected life for statistical reasons. Such a malfunction of the lamp then also leads to a complete malfunction of the entire digital projector.
  • the lamp redundant form for example, by a reserve lamp is maintained, which can ensure the continuation of the projection operation in case of malfunction of the lamp used in normal operation.
  • a digital projector instead of a broadband emitting lamp as light sources light emitting diodes, the narrow band light in the primary colors (eg, red, green, blue) of a color system
  • a disadvantage of the use of light-emitting diodes is the fact that in a functional failure of the LEDs no more images are displayed, which contain only the color of the failed LED. If, for example, an important display value or an operating state is to be displayed in red in a process control room and the red LED has failed, the corresponding display remains invisible to a viewer. In the conventional digital LED projectors so there is a risk of information loss in the event of failure of a light emitting diode.
  • Light emitting diodes is mixed to produce a certain color impression.
  • intensity fluctuations of the individual light-emitting diodes are detected, which can occur, for example, as a function of the temperature or the operating time.
  • the control signals for the individual light-emitting diodes are then correspondingly adapted in order to produce as unadulterated a color impression as possible.
  • measuring the color values of the individual light-emitting diodes does not serve the purpose of avoiding information loss if a light-emitting diode fails.
  • the invention is therefore based on the object to avoid such information losses in the event of failure of one or more of the light-emitting diodes.
  • the invention includes the general technical teaching to check the light sources of different colors (for example light-emitting diodes, lasers) for a functional failure and to replace the color of the failed light source in the case of functional failure by the color of a functioning light source. If, for example, three light-emitting diodes in the primary colors red, green and blue of the RGB color system are present and the red light-emitting diode fails, a loss of information can be avoided when a monochrome red signal is reproduced by the green light-emitting diode and / or the blue light-emitting diode be driven to produce a color-distorted, but at least visible signal.
  • different colors for example light-emitting diodes, lasers
  • the operating method according to the invention initially provides in a conventional manner for the individual differently colored light sources (eg light-emitting diodes) of the image display device to be driven with predetermined color values for producing a specific color of the illumination signal, which is known per se from the prior art and therefore not closer loading must be written.
  • the invention thus also provides that the color of the illumination signal results from a color mixing of the light signals of the differently colored light sources (eg light-emitting diodes).
  • the resulting color of the illumination signal can be adjusted by adjusting the color values of the individual differently colored light sources accordingly.
  • the operating method according to the invention provides that the differently colored light sources are checked for malfunction in the normal projection mode. This check can be carried out in the current projection mode, for example at certain intervals or continuously.
  • the color value of at least one of the error-free light sources is adjusted accordingly, in order to ensure a color-corrupted but at least visible display despite the functional failure. If, for example, a red arrow is to be displayed in a security-relevant process control room and the red light source has failed, the arrow can then be represented, for example, in green color, in blue color, or in a mixed color of green and blue, if the green light source and the blue light source Light source are still functional.
  • the individual light sources are then controlled with the correspondingly adapted color values in order to compensate for the malfunction and to avoid a loss of information.
  • the possibility that at a functional failure of the different colored light sources at least one of the remaining functional Light sources flash for example, if the red light source has failed, the blue light source and / or the green light source may flash to indicate the malfunction.
  • One way of detecting a malfunction of the light sources is to measure an operational quantity (e.g., electric current, temperature) of the light sources and to judge the operability of the light source depending on the measured operational quantity.
  • an operational quantity e.g., electric current, temperature
  • a malfunction of a light emitting diode is usually associated with a corresponding current drop, which allows the detection of a malfunction based on the time course of the electric current.
  • a functional failure of a light source usually leads to a drop in the operating temperature of the respective light source, so that it can be concluded based on the time course of the operating temperature on a malfunction.
  • a color sensor which is arranged in the beam path of the light sources and is used in conventional digital projectors, for example, for white balance. For example, if a red LED has failed, the illumination signal appears in the complementary color Green, which is detected by the color sensor and indicates a failure of the red LED.
  • color sensors can be used which output a color impression as an output signal.
  • the color sensor the
  • the invention is not limited to the above examples in terms of checking the operability of the individual light sources. Rather, the functionality of the individual light sources can also be checked in other ways.
  • the color values of the remaining functional light sources are adjusted.
  • the color values of these functional light sources are preferably raised, so that the remaining functional light sources preferably shine more strongly or at least do not remain dark.
  • the color values of the remaining functional light sources are preferably adjusted only in the event of a malfunction of a light source, if the predefined color values essentially trigger only the failed light source without the error-related adaptation. If, in fact, a mixed color is to be displayed, then a malfunction of one of the differently colored light sources only leads to color falsification, but not to a loss of information. In this case, then no adjustment of the color values is required. This is only the case if the currently displayed color matches the color of the failed same source of light or very similar in terms of their wavelength.
  • Light-emitting diodes is limited.
  • laser projectors are also known in which differently colored lasers are used as light sources.
  • the actual image is preferably generated by a digital image converter, which is illuminated by the illumination signal and driven according to the desired image with a digital image signal.
  • the image converter is preferably the micromirror field already mentioned at the beginning of the prior art, which is also referred to as the Digital Micro Mirror Device (DMD) and which is well known from the prior art, so that in terms of structure and operation the DMD requires no further explanation.
  • DMD Digital Micro Mirror Device
  • the imager has a liquid crystal display (LCD).
  • LCD liquid crystal display
  • the invention is not in the two types mentioned above with regard to the type of digital image converter used (DMD and LCD) limited, but in principle also with other types of image converter feasible.
  • the invention preferably provides that the image generated by the image converter is projected onto a projection screen by means of projection optics.
  • the projection screen is a rear projection screen, i. the projection and the viewing take place here from opposite sides of the rear projection screen.
  • the image it is alternatively possible for the image to be viewed and projected from the same side of the projection screen.
  • the illumination signal generated by the light sources is preferably split by a beam splitter into two sub-beams, one sub-beam being directed at the image converter while the other sub-beam is directed at the color sensor.
  • beam splitters are known per se from the prior art and therefore need not be described in detail.
  • the invention also includes a novel image display device, in particular a digital LED projector, which is suitable for carrying out this operating method.
  • the image display device according to the invention has a control unit which activates the individual light sources with predetermined color values in order to achieve a desired color of the illumination signal, which is also the case with conventional projectors.
  • each of the light sources in the control unit is assigned a separate power supply and drive unit, so that the failure of a power supply or drive unit only affects the associated light source, whereas the remaining light sources continue to function.
  • the image display device has an error detection unit, which checks at least one of the light sources for a possible malfunction, in order then to be able to take the measures already described above for avoiding a loss of information.
  • control unit Upon detection of a loss of function of one of the light sources by the error detection unit, the control unit then changes the color values of the remaining functional light sources in order to avoid the loss of function.
  • the colors are processed in a chronological order.
  • the differently colored light sources e.g., light emitting diodes
  • the micromirrors corresponding to that color are modulated via the imager (e.g., DMD).
  • the imager e.g., DMD
  • the error detection unit preferably has a measuring unit for measuring at least one operating variable of the individual light sources, so that the error detection unit determines a possible malfunction as a function of the measured operating variable (for example electrical current, operating temperature).
  • the measured operating variable for example electrical current, operating temperature
  • the measuring unit can each have an ammeter for the individual light sources, wherein the individual meters measure the electrical current drawn by individual light sources.
  • the measuring unit in each case has a temperature measuring device for the individual light sources, with the individual temperature measuring devices measuring the operating temperature of the individual light sources.
  • the measuring unit has the already mentioned color sensor, which measures the color composition of the illumination signal and can detect a functional failure of one of the light sources.
  • Functional failure of one of the different colored light sources can optionally be used alone or in combination with each other.
  • FIG. 1 shows a simplified schematic representation of a digital LED projector according to the invention
  • Figure 2 shows a variant of a method according to the invention for
  • FIG. 3 shows a modification of the fault detection method according to FIG. 2, wherein the operating temperature of the light-emitting diodes is evaluated
  • Figure 4 shows a modification of the error detection method according to Figure 2, wherein the color composition of the illumination signal is measured by means of a color sensor, and
  • FIG. 5 shows the operating method according to the invention for avoiding a loss of information in the event of a failure of one of the light-emitting diodes.
  • Figure 1 shows a simplified schematic representation of a digital LED projector 1, which is largely conventional and therefore will be described only briefly.
  • the LED projector 1 has as light source three LEDs 2, 3, 4, the light in the three primary colors red, green,
  • Blue of the RGB color system radiate, with the intensity of the three LEDs 2, 3, 4 corresponding preset color values can be set to produce by color mixing an illumination signal with the desired color.
  • a diffuser optics 5 and a beam splitter 6 are arranged.
  • the beam splitter 6 divides the incident illumination signal into two partial beams, the one partial beam being directed to a digital image converter 7 in the form of a digital mirror device (DMD), while the other partial beam is directed onto a color sensor 9 via a diffuser optics 8.
  • the digital image converter 7 generates the actual image, which is then projected onto a projection screen 11 via projection optics 10.
  • the actuation of the LEDs 2, 3, 4 is carried out by a control unit 12 corresponding to the desired color of the illumination signal.
  • the LED projector 1 has an error detection unit 13, which can detect a functional failure of the light-emitting diodes 2, 3, 4.
  • the fault detection unit 13 takes into account the electrical current iR, iG, iB of the individual luminous diodes 2, 3, 4, wherein the electrical currents iR, iG, iB are measured by a current measuring device 14, 15, 16. The fault detection unit 13 can then recognize from a sudden drop in the electrical current iR, iG or iB that the associated light-emitting diode 2, 3 or 4 has failed.
  • the fault detection unit 13 can measure the operating temperature TR, TG, TB of the individual light-emitting diodes 2, 3, 4.
  • the LED projector 1 according to the invention has three electrical thermometers 17, 18, 19, which measure the operating temperature TR, TG or TB of the individual light-emitting diodes 2, 3 and 4, respectively.
  • the floristdetektionsemheit 13 can then detect on the basis of a drop in temperature that the associated light-emitting diode 2, 3 or 4 has failed.
  • the error detection unit 13 still evaluates the output signals of the color sensor 9 in order to be able to detect a malfunction of the light-emitting diodes 2, 3, 4. If, for example, the red light-emitting diode 2 has failed, the light signal measured by the color sensor 9 appears green. what the error detection unit 13 recognizes on the basis of the output signal of the color sensor 9.
  • the error detection unit 13 sends a corresponding signal to the control unit 12, which then correspondingly raises the color values of the remaining functional light-emitting diodes 3, 4 in order to avoid loss of information.
  • a first step S1 first of all the average electric current iR is measured, which is drawn by the red light-emitting diode 2.
  • step S2 is then checked whether the e- lectric current iR falls below a predetermined limit IR LIMIT .
  • step S4 the average electrical current iG measured by the green LED 3 is measured.
  • the measured electric current iG is then compared in step S5 with a predetermined limit value iG G RENz.
  • step S7 the electric current iB which is drawn by the blue light-emitting diode 4 is measured.
  • the measured electric current iB is then compared in a step S8 with a predetermined limit value iB G RENz, in order to be able to detect a malfunction of the blue light-emitting diode 4.
  • a first step S1 the mean operating temperature TR of the red light-emitting diode 2 is initially measured for this purpose.
  • the measured operating temperature TR is then compared with a predetermined limit value TR LIMIT .
  • the error detection unit 13 assumes in a step S3 that the red LED 2 has failed, whereupon the error detection unit 13 sets an error flag indicating a malfunction of the red LED 2.
  • the mean operating temperature TG of the green light-emitting diode 3 is measured in a step S4 and then compared in a step S5 with a predetermined limit value TGGR E NZ.
  • the error detection unit 13 concludes that the green LED 3 malfunctions and, in a step S ⁇ , sets a corresponding error flag indicating a malfunction of the green LED 3.
  • the average operating temperature TB of the blue light-emitting diode 4 is measured in a step S7 and compared in a step S8 with a predetermined limit TB LIMIT .
  • the error detection unit 13 sets in a step S9 a corresponding error flag indicating a malfunction of the blue LED 4.
  • the average color component R of the red LED 2 is first measured in a step Sl and compared in a step S2 with a predetermined limit value R LIMIT . If the red color component R falls below the predetermined limit value R LIMIT , it can be assumed that the red LED 2 has failed, whereupon the error detection unit 13 then sets a corresponding error flag in a step S3, which constitutes a malfunction of the red LED 2 indicates.
  • the mean color content G of the green light-emitting diode 3 is measured in a step S4 by means of the color sensor 9 and compared with a predetermined limit value G LIMIT in a step S5.
  • the average color component B of the blue light-emitting diode 4 is measured in a step S7 and compared in step S8 with a predetermined limit value B LIMIT .
  • a corresponding error flag is set in a step S9 which indicates a malfunction of the blue light-emitting diode 4.
  • a first step S1 first the current color values R, G, B are determined with which the light-emitting diodes 2, 3, 4 are driven, the actual color values R, G, B depending on the color of the image to be displayed.
  • a next step S2 it is then checked whether the error flag for the red LED 2 is set.
  • step S5 the same test for the green LED 3 is performed.
  • step S3 it is checked in step S3 whether the current color values R, G, B indicate that a purely red signal is to be displayed. If this is the case, in step S4 the color values G and B for the green and blue light-emitting diodes 3, 4 are set to predetermined emergency values G NO ⁇ and B NO ⁇ , respectively, but color-falsified, but nevertheless visible Signal.
  • step S5 If the test in the step S5 shows that no error flag for the green LED 3 is set, the process proceeds to the step S8, where the same test for the blue LED 4 is performed.
  • step S ⁇ it is checked in step S ⁇ whether a purely green signal should be displayed.
  • the predetermined color values R and B for the red and blue light-emitting diodes 2 and 4, respectively, are set to predetermined emergency values R NO ⁇ and B NO ⁇ , respectively, in order to represent a color-falsified but nevertheless visible signal ,
  • step S8 If the check of the blue error flag in step S8 reveals that the blue light-emitting diode 4 has failed, then in a following step S9 it is checked whether a purely blue signal is to be displayed. If this is the case, then the predetermined color values R and G for the red or green light-emitting diode 2 or 3 are set in the step S10 to predetermined emergency values R NO ⁇ and G NO ⁇ , respectively, but a color-falsified but nevertheless visible Signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Projection Apparatus (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention concerne un procédé de mise en œuvre d'un dispositif d'affichage d'image (1), et plus particulièrement un procédé de mise en œuvre d'un projecteur numérique à diodes électroluminescentes comprenant des sources de lumière de différentes couleurs (2, 3, 4), qui produisent, par mélange des couleurs, un signal d'éclairage coloré. Ce procédé de mise en œuvre comporte les étapes suivantes: a) envoi, aux différentes sources de lumière (2, 3, 4) du dispositif d'affichage d'image (1), de commandes de valeurs chromatiques destinées à la production d'une couleur déterminée du signal d'éclairage; b) vérification de l'absence de dysfonctionnement de l'une au moins des sources de lumière de différentes couleurs (2, 3, 4); c) adaptation de la valeur chromatique prescrite d'au moins une source de lumière exempte d'erreur en cas de détection d'un dysfonctionnement de l'une des sources de lumière (2, 3, 4); d) envoi, aux différentes sources de lumière (2, 3, 4), de commandes de valeurs chromatiques adaptées pour compenser le dysfonctionnement détecté. L'invention concerne également un dispositif d'affichage d'image correspondant (1).
EP10726430A 2009-06-17 2010-06-09 Dispositif d'affichage d'image, et procédé de mise en uvre correspondant Withdrawn EP2443836A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025270A DE102009025270B4 (de) 2009-06-17 2009-06-17 Bildanzeigegerät und entsprechendes Betriebsverfahren
PCT/EP2010/003466 WO2010145773A1 (fr) 2009-06-17 2010-06-09 Dispositif d'affichage d'image, et procédé de mise en œuvre correspondant

Publications (1)

Publication Number Publication Date
EP2443836A1 true EP2443836A1 (fr) 2012-04-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10726430A Withdrawn EP2443836A1 (fr) 2009-06-17 2010-06-09 Dispositif d'affichage d'image, et procédé de mise en uvre correspondant

Country Status (3)

Country Link
EP (1) EP2443836A1 (fr)
DE (1) DE102009025270B4 (fr)
WO (1) WO2010145773A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP6314553B2 (ja) * 2014-03-07 2018-04-25 株式会社リコー レーザ光源装置および投影表示装置
US10484578B2 (en) 2018-03-30 2019-11-19 Cae Inc. Synchronizing video outputs towards a single display frequency

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JP2001100699A (ja) 1999-09-29 2001-04-13 Canon Inc 投射型表示装置とその応用システム
US6540363B1 (en) * 2000-09-01 2003-04-01 Rockwell Collins, Inc. High reliability display system
DE10256503B4 (de) * 2002-12-04 2005-03-10 Barco Control Rooms Gmbh Helligkeits- und Farbregelung eines Projektionsapparates
JP2004184852A (ja) * 2002-12-05 2004-07-02 Olympus Corp 表示装置、光源装置、及び照明装置
US7172295B2 (en) * 2004-05-10 2007-02-06 Infocus Corporation LED control system with feedback
DE102005061204A1 (de) * 2005-12-21 2007-07-05 Perkinelmer Elcos Gmbh Beleuchtungsvorrichtung, Beleuchtungssteuergerät und Beleuchtungssystem
US8829820B2 (en) * 2007-08-10 2014-09-09 Cree, Inc. Systems and methods for protecting display components from adverse operating conditions
CN101453659B (zh) * 2007-12-04 2010-12-29 深圳Tcl新技术有限公司 照明系统及其在视频显示单元中运行的方法

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Also Published As

Publication number Publication date
WO2010145773A1 (fr) 2010-12-23
DE102009025270B4 (de) 2011-03-24
DE102009025270A1 (de) 2011-01-13

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