EP1960987A1 - Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images - Google Patents

Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images

Info

Publication number
EP1960987A1
EP1960987A1 EP06830206A EP06830206A EP1960987A1 EP 1960987 A1 EP1960987 A1 EP 1960987A1 EP 06830206 A EP06830206 A EP 06830206A EP 06830206 A EP06830206 A EP 06830206A EP 1960987 A1 EP1960987 A1 EP 1960987A1
Authority
EP
European Patent Office
Prior art keywords
pixels
light
brightness values
brightness
image signal
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Withdrawn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
EP06830206A
Other languages
German (de)
English (en)
Inventor
Andreas Huber
Peter Niedermeier
Oskar Schallmoser
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP1960987A1 publication Critical patent/EP1960987A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • G09G3/36—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 liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • 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
    • 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
    • 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
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • 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
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • 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
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix

Definitions

  • Display device with a plurality of pixels and method for displaying images
  • the invention relates to a display device with a plurality of pixels, comprising a
  • An image signal generating device for generating color and brightness values for the plurality of pixels, a light modulation device coupled to the image signal generation device for modulating the plurality of pixels based on the color and brightness values, and a lighting device for backlighting the light modulation device.
  • Display devices in particular flat screens, of the type mentioned above are widely known. They are particularly suitable for use as a computer monitor or as a screen for extra-flat TV sets.
  • Light emitted from a light source is used to backlight a modulation device having a plurality of pixels, typically a liquid crystal display (LCD).
  • LCD liquid crystal display
  • Contrast range desirable. Because movies often contain scenes with a large contrast range, where contrast is the ratio between the difference between maximum and minimum brightness and a minimum displayable brightness gradation.
  • a disadvantage of using two light modulation devices is in particular in the high cost of light modulation devices that significantly affect the cost of a video.
  • the second modulation device and an image signal generating device required therefor require additional power.
  • the series connection of two light modulation devices absorbs a larger proportion of the incident light, so that a particularly powerful light source must be used, which in turn requires more energy.
  • Object of the present invention is to describe a display device of the type mentioned, which has a particularly high contrast range.
  • the display device should be inexpensive to manufacture and economical in energy consumption.
  • a display device of the type mentioned at the beginning in which the lighting device has a drive device for driving a multiplicity of light sources and the drive device is coupled to the image signal generation device or the light modulation device, so that a predetermined group of light sources, which are used to backlight a partial region of the light source Light modulation device is arranged, can be controlled by the driving device in dependence of the brightness values for contrast enhancement.
  • the illumination of particularly dark image areas can be reduced, so that the contrast range of the illustrated Overall picture increases.
  • the darkening of groups of light sources additionally provides energy savings through more efficient use of light.
  • a high contrast can advantageously be achieved with only one light modulator by partially dimming the illumination device, ie the predetermined group of light sources. Due to the dimming darker display areas can be darkened more, which has a greater contrast result.
  • each light source of the plurality of light sources can be controlled individually by the drive device. In this way, even small image areas can be darkened individually.
  • a display device advantageously operates according to a method of displaying images on a display device having a plurality of pixels, comprising the steps of:
  • Light modulation device based on the color and brightness values
  • corrected color and brightness values for modulating the predetermined groups of pixels are calculated on the basis of the received color and brightness values of the image signal, taking into account the calculated brightness characteristics.
  • the weaker backlighting of predetermined groups of pixels can be taken into account in the modulation, so that, for example, details in darkened image areas can be represented particularly well.
  • FIG. 1 shows a schematic structure of a screen according to an embodiment of the invention
  • FIG. 2 shows a flow chart for a method for displaying images, 3A to be displayed, exemplary brightness values,
  • FIG. 3B shows actual brightness values displayed according to the prior art
  • FIG. 3C shows brightness characteristics for the exemplary brightness values
  • Figure 3E actually displayed brightness values according to an embodiment of the invention.
  • Figure 1 shows in schematic form a structure of a display device 1, in the embodiment of a flat panel, according to an embodiment of the invention in cross section.
  • the screen 1 has an image signal generating device 2, a light modulation device 3 and a lighting device 4. Between the
  • Lighting device 4 and the light modulation device 3, a diffuser 5 is optionally arranged, which distributes the light of the lighting device 4 for the backlighting of the light modulation device 3.
  • a ground glass 6 is additionally arranged, which scatters the translucent light through the light modulation device 3 and at the same time protects the light modulation device 3 from contact.
  • the ground glass 6 or the diffuser 5 can also serve to select light of a predetermined polarization direction.
  • the image signal generating device 2 has an image signal decoder 7, an image memory 8, a processing unit 9 and a selection means 10.
  • the lighting device 4 has a drive device 11 and a plurality of light sources 12, in the exemplary embodiment, light-emitting diodes.
  • the light modulation device 3 comprises a plurality of pixels 13 suitable for modulating the incident light.
  • the individual pixels 13 are composed of subpixels 14, for example one subpixel 14 each for the three primary colors red, green and blue, which allow only the light of the respective primary color to pass through corresponding filters.
  • the drive device 11 of the lighting device 4 is set up to control each of the light sources 12 individually, so that the individual light sources 12 spatially assigned groups of pixels 15A, 15B and 15C can be backlit differently.
  • the modulator 5 has three mutually delimited areas, so that light of a light source 12 backlit only one group of pixels 15A, 15B or 15C. Alternatively, illumination of adjacent groups 15A, 15B or 15C may also be considered by the processing unit 9.
  • display devices 1 naturally have substantially more pixels 13 and light sources 12 used for their illumination than can be shown in FIG.
  • an illumination device 4 with approximately 200 light-emitting diodes can be used as the light sources 12 are arranged, for example, strip or kacheiförmig.
  • Figure 2 illustrates a method for displaying images on a display device 1 according to an embodiment of the invention.
  • an image signal for example a television signal
  • the image signal decoder 7 which contains the color and brightness values I so ii contained therein for the pixels 13.
  • the decoded image and brightness values I so ii are stored in the image memory 8 for further processing.
  • luminance characteristics I Char for predetermined groups of pixels 15 are calculated on the basis of the color and brightness values I so ii stored in the image memory 8.
  • the screen 1 has three groups 15A, 15B and 15C of picture elements.
  • the upper, middle and lower groups 15A, 15B and 15C are each assigned to one of the light sources 12 and illuminated by them.
  • the processing unit 9 in the second step 22 it is recognized by the processing unit 9 in the second step 22 that the lower screen area corresponding to the lower group of pixels 15C represents a particularly dark image area.
  • This information is then stored in the brightness characteristic I C har generated for the group 15C.
  • the plurality of pixels 13 are modulated by the light modulation device 3 in consideration of the decoded color and brightness values Isoii. For example, by applying different voltages to the individual pixels 13 of the light modulation device 3, the permeability of the pixels 13 or of the subpixels 14 for individual colors can be influenced in such a way that an overall image is created for a viewer.
  • crystals of a liquid crystal display are deflected by generating an electric field such that their polarization direction changes so that the light of a predetermined polarization is either transmitted or absorbed.
  • the processing unit 9 takes into account the previously calculated brightness characteristic I Char in the actual actual modulation of the pixels 13.
  • the color and brightness values corrected from the received color and brightness values I so are ii taking into account the calculated brightness characteristic I C har Ikorr used to modulate the pixels 13 of the light modulation device 3.
  • a fourth step 24 the lighting device 4 with the associated drive device 11 is controlled by the processing device 9 such that the illumination of the individual groups of pixels 15A, 15B and 15C corresponds to the previously determined brightness characteristics I C har.
  • the group of pixels 15C are darkened by darkening the associated lower light source 12.
  • the described process is repeated after a predetermined time, so that both the pixels 13 of the light modulation device 3 and the light sources 12 of the lighting device 4 are continuously driven according to the needs of each current image signal.
  • FIG. 3A shows brightness values I so II for each of the pixels 13 to be represented by the screen 1.
  • brightness values I so are considered alone, but no color information.
  • the calculation described below is performed for each of the illustrated colors, such as red, green and blue.
  • the three first pixels 13 of the first group of pixels 15A are intended to represent a very bright image area.
  • the next three pixels 13 of the second group of pixels 15B represent a medium-bright image area.
  • the last three pixels 13 of the last group 15C represent a very dark image area.
  • a brightness value I is such for each of the pixels to be displayed 13 in percent.
  • FIG. 3B shows the actually displayed brightness intensity I S d ⁇ of a screen 1 according to FIG State of the art with an exemplary contrast ratio of 1:10.
  • a light modulation device 3 can only represent ten different brightness levels.
  • the brightness values shown in FIG. 3A can only be displayed correctly in the regions of the first and second group of pixels 15A and 15B.
  • the very low brightness in the area of the third group of pixels 15C no longer allows a signal and thus realistic representation.
  • this image area is completely darkened, so that details contained therein are no longer displayed.
  • FIG. 3C shows luminance characteristics I Char determined according to an embodiment of the invention.
  • the respective maximum value of a group of pixels 15A, 15B or 15C is used as the brightness characteristic.
  • the first light source 12 of the first group 15A is driven at 100 percent of the possible power, the second light source 12 at 60 percent of the possible power, and the third light source 12 at only one percent of the possible power. Since the luminous intensity of light-emitting diodes used as light source 12 in the exemplary embodiment increases substantially linearly with an operating current, the individual light sources 12 can be controlled as required, for example, by current control.
  • FIG. 3D shows corrected brightness values Ikorr for driving the modulation device 3, which are calculated by the processing unit 9, for example.
  • the Embodiment yield the corrected brightness values Ikorr by dividing the displayed brightness values I so ii of Figure 3A by the calculated brightness characteristic I C har of Figure 3B.
  • FIG. 3E the brightness values I lst perceived by a viewer on the screen 6 are shown. Since the brightness values I visible on the ground glass 6 essentially result from multiplication of the illumination intensity corresponding to the brightness characteristic I C har shown in FIG. 3C with the corrected brightness values I kOrr of FIG. 3D used for the modulation, the brightness values I illustrated in FIG For each of the individual pixels 13, the brightness values I contained in the image signal are exactly the same . Thus, a true-to-life rendition of the image signal is possible.
  • individual image areas can also be specifically darkened or lightened with the aid of the selection means 10.
  • a screen 1 is used to display the image signal
  • the method of the invention can of course be used in other display methods and devices, for example, in a projection or rear projection, such as a video projector or so-called beamer.
  • a reflective one instead of a filtering light modulation device 3 such as a liquid crystal display
  • Modulation device 9 such as a matrix of controllable mirrors (Digital Mirror Device - DMD) to use.
  • light-emitting diodes instead of the light-emitting diodes used in the exemplary embodiment, it is also possible to use other light sources 12, in particular small-area light sources, which are suitable for illuminating individual groups of pixels 15. It is advantageous if the light sources
  • OLEDs organic, surface-emitting light-emitting diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

L'invention concerne un dispositif d'affichage comprenant une pluralité de pixels et un procédé d'affichage d'images. L'invention concerne un dispositif d'affichage (1) comportant une pluralité de pixels (13) et présentant un générateur de signaux d'image (2) pour générer les valeurs de couleur et de luminosité des pixels (13), un modulateur de lumière (3) couplé au générateur de signaux d'image (2) et destiné à la modulation d'une pluralité de pixels (13) sur la base des valeurs de couleur et de luminosité et un dispositif d'éclairage (4) destiné au rétro-éclairage du modulateur de lumière (3). L'invention est caractérisée en ce que le dispositif d'éclairage (4) présente un dispositif de commande (11) qui permet de commander une pluralité de sources lumineuses (12) et qui est couplé au générateur de signaux d'image (2) ou au modulateur de lumière (3) de façon que le dispositif de commande (11) puisse commander, en fonction des valeurs de luminosité, un groupe prédéterminé de sources lumineuses (12) destinées au rétro-éclairage d'une zone partielle du modulateur de lumière (3) afin d'améliorer le contraste. L'invention concerne également un procédé permettant d'afficher des images sur un dispositif d'affichage (1) comportant une pluralité de pixels (13) .
EP06830206A 2005-12-14 2006-11-30 Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images Withdrawn EP1960987A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059765A DE102005059765A1 (de) 2005-12-14 2005-12-14 Anzeigevorrichtung mit einer Vielzahl von Bildpunkten und Verfahren zum Anzeigen von Bildern
PCT/EP2006/069102 WO2007068594A1 (fr) 2005-12-14 2006-11-30 Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images

Publications (1)

Publication Number Publication Date
EP1960987A1 true EP1960987A1 (fr) 2008-08-27

Family

ID=37771083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830206A Withdrawn EP1960987A1 (fr) 2005-12-14 2006-11-30 Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images

Country Status (9)

Country Link
US (1) US20090109248A1 (fr)
EP (1) EP1960987A1 (fr)
JP (1) JP2009519478A (fr)
KR (1) KR20080081968A (fr)
CN (1) CN101326565A (fr)
CA (1) CA2633864A1 (fr)
DE (1) DE102005059765A1 (fr)
TW (1) TW200746004A (fr)
WO (1) WO2007068594A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080238856A1 (en) * 2007-03-29 2008-10-02 Achintva Bhowmik Using spatial distribution of pixel values when determining adjustments to be made to image luminance and backlight
DE102007044476A1 (de) * 2007-09-18 2009-03-19 Osram Gesellschaft mit beschränkter Haftung Beleuchtungseinheit und Verfahren zur Ansteuerung der Beleuchtungseinheit
FR2931296B1 (fr) * 2008-05-13 2013-04-26 Commissariat Energie Atomique Circuit de controle d'un pixel a coordonnees chromatiques variables
WO2009138965A1 (fr) * 2008-05-16 2009-11-19 Nxp B.V. Barres ultra noires dans une télévision à affichage à cristaux liquides
KR101022650B1 (ko) * 2008-11-18 2011-03-22 삼성모바일디스플레이주식회사 평판 디스플레이 장치
US8228357B2 (en) * 2009-07-29 2012-07-24 Samsung Electronics Co., Ltd. Generation of subpixel values and light source control values for digital image processing
CN102511047A (zh) * 2010-05-14 2012-06-20 联发科技（新加坡）私人有限公司 视频节目的字幕消除方法以及相关视频显示系统
WO2012028678A2 (fr) * 2010-09-01 2012-03-08 Seereal Technologies S.A. Dispositif de fond de panier
CN105204149B (zh) * 2015-10-30 2021-05-11 吴东辉 被动式定向反光成像装置
JP2017181712A (ja) * 2016-03-30 2017-10-05 セイコーエプソン株式会社 表示装置、画像処理装置、及び、表示方法
FR3053805A1 (fr) * 2016-07-05 2018-01-12 Valeo Comfort And Driving Assistance Dispositif de generation d'images pour afficheur tete-haute et procede de pilotage d'un tel dispositif
CN109474812A (zh) * 2018-11-22 2019-03-15 中国电影器材有限责任公司 一种激光投影方法、激光光源及投影系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6891672B2 (en) * 2001-02-27 2005-05-10 The University Of British Columbia High dynamic range display devices
EP1485904B1 (fr) * 2002-03-13 2012-08-29 Dolby Laboratories Licensing Corporation Dispositifs d'affichage a plage dynamique elevee
JP4493274B2 (ja) * 2003-01-29 2010-06-30 富士通株式会社 表示装置及び表示方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007068594A1 *

Also Published As

Publication number Publication date
TW200746004A (en) 2007-12-16
JP2009519478A (ja) 2009-05-14
WO2007068594A1 (fr) 2007-06-21
KR20080081968A (ko) 2008-09-10
US20090109248A1 (en) 2009-04-30
CA2633864A1 (fr) 2007-06-21
CN101326565A (zh) 2008-12-17
DE102005059765A1 (de) 2007-06-21

Similar Documents

Publication Publication Date Title
EP1960987A1 (fr) Dispositif d'affichage ayant une pluralite de pixels et procede d'affichage d'images
US10431166B2 (en) Dynamic dimming LED backlight
DE69829874T2 (de) Verfahren und vorrichtung zur kontrastregelung von flüssigkristallanzeigen bei empfang von video mit breitem dynamik-bereich
DE69110229T2 (de) Anzeigeeinrichtung.
DE69025341T2 (de) Rastersequentielles Anzeigesystem mit einer von der Rückseite beleuchtbaren Anordnung von Flüssigkristallbildelementen und Verfahren zur Bilderzeugung
DE102004030556B4 (de) Verfahren und Vorrichtung zum Treiben einer Flüssigkristallanzeige
US7525528B2 (en) Technique that preserves specular highlights
DE69421511T2 (de) Matrixanzeigesysteme und verfahren zu deren steuerung
DE102005024121B4 (de) Vorrichtung und Verfahren zur Helligkeitssteuerung einer Flüssigkristalldisplay-Einrichtung
US20070159451A1 (en) Backlit display with improved dynamic range
DE102010042710A1 (de) Flüssigkristallanzeigevorrichtung
US20090243992A1 (en) High Efficiency Display Utilizing Simultaneous Color Intelligent Backlighting and Luminescence Controlling Shutters
DE60203502T2 (de) Anzeigetafel mit farbfehlern in folge unterschiedlicher leuchtstoff- antwortzeiten
DE102010036507A1 (de) Flüssigkristallanzeigevorrichtung und Verfahren zum Ansteuern derselben
DE69738319T2 (de) LCD-Projektor
EP1877998A1 (fr) Dispositif de sources lumineuses pour retroeclairer des dispositifs d'affichages et dispositif d'affichage
US20070229444A1 (en) Liquid crystal display, method for displaying color images, and method for controlling light sources of an lcd panel
EP3933569A1 (fr) Dispositif d'affichage, panneau et procédé de commande associé
DE102016100592B4 (de) Projektor zum Projizieren von Bildern
EP2534533A1 (fr) Procédés et dispositifs de réduction de halo hors axe
DE102009016420A1 (de) Vorrichtung und Verfahren zur Ansteuerung eines Pixels
DE102018130240A1 (de) Verfahren zur Ansteuerung einer Matrixanzeige sowie Matrixanzeige
KR100667061B1 (ko) 필드시퀀셜 액정표시장치의 구동방법
DE19621911A1 (de) Farbdisplay, aufgebaut aus einem Monochrom-Display mit dreifarbiger LED-Hintergrundbeleuchtung
DE102016101410A1 (de) Verfahren zum Steuern einer Anzeige mit einer Matrix von Anzeigepixeln einer Werbevorrichtung und Werbevorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080516

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HUBER, ANDREAS

Inventor name: NIEDERMEIER, PETER

Inventor name: SCHALLMOSER, OSKAR

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): AT DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110601