EP1818901B1 - Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique - Google Patents
Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique Download PDFInfo
- Publication number
- EP1818901B1 EP1818901B1 EP06101680A EP06101680A EP1818901B1 EP 1818901 B1 EP1818901 B1 EP 1818901B1 EP 06101680 A EP06101680 A EP 06101680A EP 06101680 A EP06101680 A EP 06101680A EP 1818901 B1 EP1818901 B1 EP 1818901B1
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- European Patent Office
- Prior art keywords
- image
- backlight
- display
- average
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- 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.)
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Images
Classifications
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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
- G09G3/20—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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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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
- 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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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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
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
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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
- G09G3/20—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
- G09G3/3611—Control of matrices with row and column drivers
Definitions
- a system for an electronic device comprising: a display for displaying an image to be backlit; a backlight adjustment module to calculate an average intensity of said image on a running average basis from a greyscale value associated with said image corrected according to a gamma curve and to determine an backlight level for said image using said average intensity; and a backlight system to provide a backlight for said display, said backlight system responsive to control signals generated by said backlight adjustment module, whereby the darker the image the greater is the backlight intensity.
- the average intensity may be calculated from a greyscale value associated with the image and the greyscale value may have been corrected according to a gamma curve.
- Communication functions including data and voice communications, are performed through the communication subsystem 34 and the short-range communication subsystem 36. Collectively, subsystem 34 and subsystem 36 provide the signal-level interface for all communication technologies processed by device 10. Various other applications 48 provide the operational controls to further process and log the communications.
- Communication subsystem 34 includes receiver 50, transmitter 52 and one or more antennas, illustrated as receive antenna 54 and transmit antenna 56. In addition, communication subsystem 34 also includes processing module, such as digital signal processor (DSP) 58 and local oscillators (LOs) 60. The specific design and implementation of communication subsystem 34 is dependent upon the communication network in which device 10 is intended to operate.
- DSP digital signal processor
- LOs local oscillators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Liquid Crystal (AREA)
Claims (19)
- Système pour un dispositif électronique (10), comprenant :un écran (14) pour afficher une image destinée à être éclairée par l'arrière ;un module (48G) d'ajustement d'éclairage par l'arrière pour calculer une intensité moyenne de ladite image sur une base de moyenne mobile à partir d'une valeur d'échelle de gris associée à ladite image corrigée d'après une courbe de gamma et pour déterminer un niveau d'éclairage par l'arrière pour ladite image en utilisant ladite intensité moyenne ; etun système (64) d'éclairage par l'arrière pour fournir un éclairage par l'arrière pour ledit écran (14), ledit système d'éclairage par l'arrière réagissant à des signaux de commande engendrés par ledit module d'ajustement d'éclairage par l'arrière, ce par quoi plus l'image est sombre, plus l'intensité d'éclairage par l'arrière est grande.
- Système selon la revendication 1, dans lequel ladite valeur d'échelle de gris est obtenue à partir d'un calcul pondéré dans lequel les valeurs de vert sont pondérées le plus lourdement.
- Système selon la revendication 1 ou 2, dans lequel ledit niveau d'éclairage par l'arrière est ajusté entre des niveaux minimal et maximal d'éclairage par l'arrière pour ledit écran (14) réglé, respectivement, pour une image complètement blanche et pour une image complètement noire.
- Système selon l'une quelconque des revendications 1 à 3, dans lequel ledit système est agencé pour faire un autre calcul pour une autre valeur d'intensité pour une autre image lorsque ladite image est remplacée sur ledit écran (14) par ladite autre image.
- Système selon la revendication 4, dans lequel ladite image et ladite autre image se rapportent à un signal vidéo.
- Système selon l'une quelconque des revendications précédentes, dans lequel on calcule la moyenne mobile en additionnant séquentiellement une valeur de pixel d'échelle de gris à un total en cours.
- Système selon la revendication 6, dans lequel la moyenne mobile se calcule d'après l'équation :
où AN est la nouvelle moyenne, A N-1 est la moyenne précédente, X est la nouvelle valeur d'échelle de gris ajoutée à la moyenne, et N est le nombre de valeurs inclus dans la moyenne jusqu'ici. - Système selon l'une quelconque des revendications précédentes, dans lequel ledit niveau d'éclairage par l'arrière réagit en outre à un signal représentant une quantité de lumière ambiante détectée autour du dispositif, ce par quoi, lorsque la quantité de lumière ambiante augmente, le niveau d'éclairage par l'arrière augmente.
- Procédé d'ajustement d'un éclairage par l'arrière pour une image engendrée sur un écran (14) d'un dispositif électronique, comprenant :le calcul d'une intensité moyenne de ladite image sur une base de moyenne mobile à partir d'une valeur d'échelle de gris associée à ladite image corrigée d'après une courbe de gamma ;la détermination d'un niveau d'éclairage par l'arrière pour ladite image en se basant sur ledit niveau d'intensité ; etla fourniture dudit niveau d'éclairage par l'arrière à un système (64) d'éclairage par l'arrière pour un écran lorsque ladite image est engendrée sur ledit écran (14), ce par quoi plus l'image est sombre, plus l'intensité d'éclairage par l'arrière est grande.
- Procédé selon la revendication 9, dans lequel ladite valeur d'échelle de gris est obtenue à partir d'un calcul pondéré dans lequel les valeurs de vert sont pondérées le plus lourdement.
- Procédé selon la revendication 9 ou 10, dans lequel ledit niveau d'éclairage par l'arrière est ajusté entre des niveaux minimal et maximal d'éclairage par l'arrière, ledit écran étant réglé, respectivement, pour une image complètement blanche et pour une image complètement noire.
- Procédé selon l'une quelconque des revendications 9 à 11, dans lequel on fait un autre calcul pour une autre valeur d'intensité pour une autre image lorsque ladite image est remplacée sur ledit écran par ladite autre image.
- Procédé selon la revendication 12, dans lequel ledit autre calcul est fait pour une autre valeur d'intensité pour une autre image lorsque ladite image est remplacée sur ledit écran par ladite autre image et dans lequel ladite autre valeur d'intensité est calculée sur une section prédéfinie de ladite autre image.
- Procédé selon la revendication 13, dans lequel ledit écran affiche une image vidéo comprenant ladite image et ladite autre image ; et dans lequel on fait un autre calcul pour une autre valeur d'intensité pour une autre image montrée sur ledit écran (14) après ladite image.
- Procédé selon l'une quelconque des revendications 9 à 14, dans lequel on calcule la moyenne mobile en additionnant séquentiellement une valeur de pixel à un total en cours.
- Procédé selon la revendication 15, dans lequel la moyenne mobile se calcule d'après l'équation :
où AN est la nouvelle moyenne, A N-1 est la moyenne précédente, X est la nouvelle valeur ajoutée à la moyenne, et N est le nombre de valeurs inclus dans la moyenne jusqu'ici. - Procédé selon l'une quelconque des revendications 9 à 15, dans lequel ledit niveau d'éclairage par l'arrière est en outre ajusté en utilisant une information d'état d'éclairage ambiant de sorte que lorsque la quantité de lumière ambiante augmente, le niveau d'éclairage par l'arrière augmente.
- Dispositif électronique comportant le système selon l'une quelconque des revendications 1 à 8.
- Produit de programme informatique destiné à ajuster un éclairage par l'arrière pour un écran pour un dispositif électronique, ledit produit de programme informatique comprenant un support lisible par ordinateur incorporant un moyen formant code de programme pour mettre en oeuvre dans un dispositif électronique le procédé selon l'une quelconque des revendications 9 à 17.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06101680A EP1818901B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
| DE602006012439T DE602006012439D1 (de) | 2006-02-14 | 2006-02-14 | System und Verfahren zur Einstellung eines Rückbeleuchtungsgrades für eine Anzeige einer elektronischen Vorrichtung |
| AT06101680T ATE459072T1 (de) | 2006-02-14 | 2006-02-14 | System und verfahren zur einstellung eines rückbeleuchtungsgrades für eine anzeige einer elektronischen vorrichtung |
| EP10152602.8A EP2184732B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
| CA2574807A CA2574807C (fr) | 2006-02-14 | 2007-01-22 | Systeme et methode pour regler le niveau de retro-eclairage de l'afficheur d'un dispositif electronique |
| HK08101716.3A HK1108964A1 (en) | 2006-02-14 | 2008-02-15 | System and method for adjusting a backlight level for a display on an electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06101680A EP1818901B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10152602.8A Division EP2184732B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1818901A1 EP1818901A1 (fr) | 2007-08-15 |
| EP1818901B1 true EP1818901B1 (fr) | 2010-02-24 |
Family
ID=36177811
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10152602.8A Active EP2184732B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
| EP06101680A Active EP1818901B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10152602.8A Active EP2184732B1 (fr) | 2006-02-14 | 2006-02-14 | Système et procédé pour régler le niveau de rétroéclairage de l'affichage dans un dispositif électronique |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP2184732B1 (fr) |
| AT (1) | ATE459072T1 (fr) |
| CA (1) | CA2574807C (fr) |
| DE (1) | DE602006012439D1 (fr) |
| HK (1) | HK1108964A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2099019A1 (fr) | 2008-02-29 | 2009-09-09 | Research In Motion Limited | Système et procédé pour régler une valeur d'intensité et un niveau de rétroéclairage de l'affichage dans un dispositif électronique |
| US8194028B2 (en) | 2008-02-29 | 2012-06-05 | Research In Motion Limited | System and method for adjusting an intensity value and a backlight level for a display of an electronic device |
| WO2010092179A1 (fr) * | 2009-02-16 | 2010-08-19 | Arcelik Anonim Sirketi | Dispositif d'affichage et son procédé de commande |
| CN110288952B (zh) * | 2019-06-24 | 2021-07-16 | 湖北亿咖通科技有限公司 | 一种车载系统开机时背光亮度的设置方法和装置 |
| CN113192464B (zh) * | 2020-01-14 | 2023-01-13 | 华为技术有限公司 | 一种背光调节方法及电子设备 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03179886A (ja) | 1989-12-07 | 1991-08-05 | Toshiba Corp | 投写形液晶表示装置 |
| TW518882B (en) | 2000-03-27 | 2003-01-21 | Hitachi Ltd | Liquid crystal display device for displaying video data |
| US6762741B2 (en) * | 2000-12-22 | 2004-07-13 | Visteon Global Technologies, Inc. | Automatic brightness control system and method for a display device using a logarithmic sensor |
| US7093941B2 (en) * | 2001-04-25 | 2006-08-22 | Matsushita Electric Industrial Co., Ltd. | Video display apparatus and video display method |
-
2006
- 2006-02-14 EP EP10152602.8A patent/EP2184732B1/fr active Active
- 2006-02-14 EP EP06101680A patent/EP1818901B1/fr active Active
- 2006-02-14 AT AT06101680T patent/ATE459072T1/de not_active IP Right Cessation
- 2006-02-14 DE DE602006012439T patent/DE602006012439D1/de active Active
-
2007
- 2007-01-22 CA CA2574807A patent/CA2574807C/fr active Active
-
2008
- 2008-02-15 HK HK08101716.3A patent/HK1108964A1/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP2184732B1 (fr) | 2014-12-17 |
| HK1108964A1 (en) | 2008-05-23 |
| DE602006012439D1 (de) | 2010-04-08 |
| EP1818901A1 (fr) | 2007-08-15 |
| CA2574807C (fr) | 2012-04-03 |
| ATE459072T1 (de) | 2010-03-15 |
| CA2574807A1 (fr) | 2007-08-14 |
| EP2184732A1 (fr) | 2010-05-12 |
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