EP0911799A2 - Méthode et appareil de commande de la luminance d'un dispositif d'affichage - Google Patents

Méthode et appareil de commande de la luminance d'un dispositif d'affichage Download PDF

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Publication number
EP0911799A2
EP0911799A2 EP98301219A EP98301219A EP0911799A2 EP 0911799 A2 EP0911799 A2 EP 0911799A2 EP 98301219 A EP98301219 A EP 98301219A EP 98301219 A EP98301219 A EP 98301219A EP 0911799 A2 EP0911799 A2 EP 0911799A2
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EP
European Patent Office
Prior art keywords
luminance
display
display part
information processing
luminance value
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Withdrawn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
EP98301219A
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German (de)
English (en)
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EP0911799A3 (fr
Inventor
Yasuhiko c/o Fujitsu Limited Watanabe
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.)
Fujitsu Ltd
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Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0911799A2 publication Critical patent/EP0911799A2/fr
Publication of EP0911799A3 publication Critical patent/EP0911799A3/fr
Withdrawn legal-status Critical Current

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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
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
    • 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
    • G09G2320/0606—Manual adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—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
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment 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
    • 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
    • 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

Definitions

  • the present invention generally relates to display control methods and information processing apparatuses, and more particularly to a display control method suited for controlling a display part which is driven by a batter and to an information processing apparatus which uses such a display control method.
  • the LCD In a case where the LCD is used for a display part, it is desirable to provide a back light part so as to facilitate viewing of the liquid crystal display. But when the back light part is provided, the power consumption required for the display increases, and the serviceable life of the battery is shortened in the case of a portable information processing apparatus which uses the battery as the power supply. For this reason, the luminance adjustment of the display part is conventionally made manually by the user by taking into consideration the life of the battery according to a first method or, the luminance of the display part is forcibly set to a minimum luminance value according to a second method.
  • the first method the user must constantly be aware of the life of the battery and manually adjust the luminance of the display part, thereby complicating the operation of the information processing apparatus.
  • the second method when the second method is used, the display is difficult to see if the minimum luminance value is small, but the effect of reducing the power consumption is small if the minimum luminance value is relatively large.
  • the operation of the information processing apparatus becomes complicated and the operation characteristic of the information processing apparatus becomes poor.
  • the second method there were problems in that the display is difficult to see if the minimum luminance value is small, and the effect of reducing the power consumption is small if the minimum luminance value is relatively large, thereby making it impossible to simultaneously realize a display which is easy to see and a low power consumption.
  • Another and more specific object of the present invention to provide a display control method and an information processing apparatus which can reduce the power consumption without requiring a complicated operation and without making a display on a display part difficult to see.
  • Still another object of the present invention is to provide a display control method comprising a luminance adjusting step of gradually decreasing a luminance of a display part having a luminance adjusting function from a maximum luminance value to a minimum luminance value with lapse of time, even during an operation other than a luminance adjusting operation, in a display unit.
  • a display control method of the present invention it is possible to reduce the power consumption without requiring a complicated operation and without making a display on the display part difficult to see.
  • a further object of the present invention is to provide an information processing apparatus comprising a display part having a luminance adjusting function, and a luminance control part gradually decreasing a luminance of the display part from a maximum luminance value to a minimum luminance value with lapse of time, even during an operation other than a luminance adjusting operation. According to the information processing apparatus of the present invention, it is possible to reduce the power consumption without requiring a complicated operation and without making a display on the display part difficult to see.
  • FIG.1 is a system block diagram showing an important part of a first embodiment of an information processing apparatus according to the present invention.
  • This first embodiment of the information processing apparatus employs a first embodiment of a display control method according to the present invention.
  • the present invention is applied to a portable information processing apparatus.
  • the portable information processing apparatus is a lap-top personal computer, a portable communication equipment or the like, for example.
  • the information processing apparatus generally includes a display part 1, a luminance control part 3, and an information processing part 4.
  • the display part 1 is made of a LCD, PDP, CRT or the like, and has a luminance adjusting function.
  • This display part 1 displays display information received from the information processing part 4 based on luminance information received from the luminance control part 3.
  • the luminance control part 3 includes a setting part which is provided with buttons, knobs, keys of the like for adjusting the luminance, and a controller which is made of a CPU or the like.
  • the controller of the luminance control part 3 has the functions of supplying to the display part 1 the luminance information that is dependent upon a luminance value set from the information processing part 4, and supplying to the display part 1 the luminance information for automatically decreasing the luminance of the display part 1 from a maximum luminance value to a minimum luminance value with a predetermined transition time.
  • this operation is notified to the information processing part 4, and the controller of the luminance control part 3 also has the function of automatically updating the minimum luminance value to a luminance value at the time when this operation is made in response to luminance setting information from the information processing part 4.
  • the information processing part 4 supplies display information to the display part 1 based on an input made from an input device (not shown) such as a keyboard, and supplies to the luminance control part 3 the luminance setting information related to the luminance value that is set from the input device or the setting part described above.
  • the maximum luminance value and the minimum luminance value may be set in advance or, set in the luminance control part 3 via the information processing part 4 based on an input made from the input device.
  • the predetermined transition time described above may also be set in advance or, set in the luminance control part 3 via the information processing part 4 based on an input made from the input device.
  • the display part 1 may be realized by a display part having a known construction
  • the information processing part 4 may be realized by an information processing part having a known construction. This embodiment is characterized by the process of the controller of the luminance control part 3.
  • FIGS.2 and 3 respectively are diagrams for explaining the operation of the luminance control part 3.
  • the ordinate indicates a luminance value that is displayed on the display part 1 based on the luminance information output from the luminance control part 3, and the abscissa indicates the time.
  • K1 indicates the maximum luminance value
  • K2 indicates the minimum luminance value.
  • FIG.2 shows the luminance for a case where the setting part of the luminance control part 3 is not operated.
  • the luminance of the display part 1 decreases to the minimum luminance value K2 in a predetermined transition time T1 from a time ta to a time tb, regardless of the operation of the input device, that is, regardless of whether or not an access is made to the information processing part 4.
  • the time ta corresponds to the time when the power supply of the information processing apparatus is turned ON. Because the luminance of the display part 1 automatically and gradually decreases with the lapse of time, it is possible to gradually reduce the power consumption of the display part 1 without making the display difficult to see such that the user will feel uncomfortable or unpleasant.
  • FIG.3 shows the luminance for a case where the setting part of the luminance control part 3 is operated.
  • the luminance of the display part 1 gradually decreases from the time ta, regardless of whether or not an access is made to the information processing part 4, and that the luminance value is increased to K3 by the setting part at a time tc when the user detects that the luminance has decreased too much.
  • the luminance value at the time when the luminance value is increased to K3 by the setting part that is, the luminance value immediately prior to increasing the luminance value, is K2A.
  • the minimum luminance value set in the controller of the luminance control part 3 is updated to this luminance value K2A. Accordingly, after the time tc, the luminance of the display part 1 gradually decreases from the luminance value K2A, and decreases to the updated minimum luminance value K2A by a time tb'.
  • the luminance value will not decrease to a value smaller than the luminance value at the time when this operation is made. For this reason, the display is made with a minimum luminance value which suits the user's needs or preference, and it is possible to gradually reduce the power consumption of the display part 1 without making the display difficult to see such that the user will feel uncomfortable or unpleasant.
  • FIG.4 is a system block diagram showing an important part of the second embodiment of the information processing apparatus.
  • This second embodiment of the information processing apparatus employs a second embodiment of the display control method according to the present invention.
  • the present invention is applied to a portable information processing apparatus which uses a LCD having a back light part.
  • those parts which are the same as those corresponding parts in FIG.1 are designated by the same reference numerals, and a description thereof will be omitted.
  • the display part 1 has a known construction including a LCD 11 and a back light part 12.
  • the back light part 12 has a fluorescent lamp 13 and a fluorescent lamp power supply 14.
  • the luminance control part 3 includes a controller 31 which is made up of a CPU or the like and has a memory 31a, and a setting part 32 which has buttons, knobs, keys or the like for adjusting the luminance.
  • the information processing part 4 has a known construction including an input/output (I/O) interface 41, a CPU 42, a memory 43 and a display controller 44 which are coupled via a bus 40.
  • the controller 31 is coupled to the fluorescent lamp power supply 14.
  • the setting part 32 is coupled to the controller 31.
  • the setting part 32 and a keyboard 7 are respectively coupled to the I/O interface 41, and the I/O interface 41 is coupled to the controller 31.
  • the display controller 44 is coupled to the LCD 11.
  • the controller 31 supplies luminance information to the fluorescent lamp power supply 14, and controls the luminance of the fluorescent lamp 13.
  • the fluorescent lamp power supply 14 may be formed by a digital-to-analog (D/A) converter.
  • the LCD 11 makes a display based on display information tat is obtained from the display controller 44, and the luminance of the display is controlled by the fluorescent lamp 13.
  • FIGS.5 and 6 respectively are diagrams showing functions used to gradually decrease the luminance value.
  • the ordinate indicates the luminance
  • the abscissa indicates the time.
  • FIG.5 shows a case where the function is linear, and a slope of this function can be set arbitrarily.
  • FIG.6 shows a case where the function is non-linear, and a curve of this function can also be set arbitrarily.
  • Information input from the keyboard 7 or information input from an external unit is supplied to the CPU 42 via the I/O interface 41 within the information processing part 4, and display information is supplied from the CPU 42 to the LCD 11 via the display controller 44.
  • luminance setting information related to this luminance value is supplied to the controller 31 via the I/O interface 41 under the control of the CPU 42.
  • a notification related to this operation is made from the setting part 32 to the CPU 42 via the I/O interface 41, and the CPU 42 supplies luminance setting information dependent upon this notification to the controller 31 via the I/O interface 41.
  • the memory 43 is made of a ROM which stores programs to be executed by the CPU 42, and a RAM which stores intermediate results of operations carried out by the CPU 42 and the like.
  • the display controller 44 controls the display on the LCD 11 depending on horizontal and vertical scanning frequencies which are set, under the control of the CPU 42.
  • FIG.7 is a flow chart for explaining the operation of the controller 31.
  • a step S1 sets in the memory 31a a luminance initial value, that is, the maximum luminance value, based on the luminance setting information from the information processing part 4.
  • a step S2 decides whether or not to decrease the luminance value based on the function stored in the memory 31a. If the decision result in the step S2 is NO, a step S3 decides whether or not the luminance is adjusted by the operation of the setting part 32. If the decision result in the step S3 is NO, the process returns to the step S2.
  • a step S4 decides whether or not the luminance value is the minimum luminance value stored in the memory 31a, and the process advances to the step S3 described above if the decision result in the step S4 is YES.
  • a step S5 decreases the luminance based on the function which is shown in FIG.5 or FIG.6 and is stored in the memory 31a, and the process thereafter advances to the step S3.
  • a step S6 automatically updates the minimum luminance value that is stored in the memory 31a to the present luminance value.
  • a step S7 increases the luminance to a luminance value set by the user depending on the operation of the setting part 32, and the process thereafter returns to the step S2.
  • step S2 it is also possible to decide whether or not to decrease the luminance value based on power supply information supplied to the I/O interface 41 from the external unit, instead of deciding whether or not to decrease the luminance value based on the function stored in the memory 31a.
  • the step S2 decides whether or not to decrease the luminance value based on whether or not the power supply of the LCD 11, that is, the power supply of the information processing apparatus, is a battery. It is possible to detect by a known means whether or not the power supply of the information processing apparatus is a battery or an A.C. power supply. Hence, this first modification decides whether or not to decrease the luminance value by deciding whether or not the power supply is a battery, based on the power supply information received by the I/O interface 41 from the external unit.
  • the step S2 decides whether or not to decrease the luminance value based on whether or not the power supply of the LCD 11, that is, the power supply of the information processing apparatus, is a battery, and a remaining capacity of the battery is less than or equal to a predetermined value. It is possible to detect by a known means the remaining capacity of the battery which is used as the power supply of the information processing apparatus.
  • this second modification decides whether or not to decrease the luminance value by deciding whether or not the remaining capacity of the battery which is used as the power supply is less than or equal to the predetermined value, based on the power supply information received by the I/O interface 41 from the external unit.
  • the step S2 decides whether or not to decrease the luminance value based on whether or not the power supply of the LCD 11, that is, the power supply of the information processing apparatus, is an A.C. power supply. It is possible to detect by a known means whether or not the power supply of the information processing apparatus is an A.C. power supply. Hence, this third modification decides whether or not to decrease the luminance value by deciding whether or not the power supply is an A.C. power supply, based on the power supply information received by the I/O interface 41 from the external unit.
  • the step S2 shown in FIG.7 is made up of steps S21 and S22 shown in FIG.8.
  • the step S21 decides whether or not the power supply is an A.C. power supply based on the power supply information, and the process advances to the step S4 if the decision result in the step S21 is NO.
  • the step S22 fixes the luminance to a luminance value greater than the minimum luminance value stored in the memory 31a because the power consumption does not become a big problem while the A.C. power supply is being used, and the process advances to the step S3.
  • the step S2 decides whether or not to decrease the luminance value based on whether or not the power supply of the LCD 11, that is, the power supply of the information processing apparatus, is a battery, and a remaining capacity of the battery is less than or equal to a predetermined value.
  • the step S2 updates the minimum luminance value to a smaller value when the remaining capacity of the battery becomes less than or equal to the predetermined value, so as to prevent wear of the battery having a remaining capacity that is small.
  • the remaining capacity of the battery which is used as the power supply of the information processing apparatus can be detected by a known means.
  • this fourth modification decides whether or not to decrease the luminance value by deciding whether or not the remaining capacity of the battery which is use as the power supply is less than or equal to the predetermined value, based on the power supply information received by the I/O interface 41 from the external unit, and updates the minimum luminance value to the smaller value when the remaining capacity of the battery becomes less than or equal to the predetermined value.
  • the step S2 shown in FIG.7 is made up of steps S21 through S24 shown in FIG.9.
  • steps S21 through S24 shown in FIG.9.
  • those steps which are the same as those corresponding steps in FIG.8 are designated by the same reference numerals, and a description thereof will be omitted.
  • a step S23 decides whether or not the remaining capacity of the battery is less than or equal to the predetermined value based on the power supply information, and the process advances to the step S4 if the decision result in the step S23 is NO.
  • a step S24 updates the minimum luminance value stored in the memory 31a to the smaller value, and the process thereafter advances to the step S4.
  • FIG.10 is a diagram for explaining a change in the luminance according to the fourth modification of the second embodiment.
  • the ordinate indicates the luminance
  • the abscissa indicates the time.
  • the power supply of the information processing apparatus is switched from the battery to the A.C. power supply at a time tx when the luminance reaches the minimum luminance value K2 after gradually decreasing from the maximum luminance value K1 depending on a non-linear function.
  • the remaining capacity of the battery becomes less than or equal to the predetermined value at a time ty while the battery is being used as the power supply of the information processing apparatus.
  • the luminance is fixed to a luminance value K3 (K3 > K2) at the time tx, and the minimum luminance value K2 is updated to a luminance value K4 (K4 ⁇ K2) at the time ty, as described above in conjunction with FIG.9.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Power Sources (AREA)
  • Television Receiver Circuits (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
EP98301219A 1997-10-20 1998-02-19 Méthode et appareil de commande de la luminance d'un dispositif d'affichage Withdrawn EP0911799A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP28733897 1997-10-20
JP287338/97 1997-10-20
JP9287338A JPH11119877A (ja) 1997-10-20 1997-10-20 表示制御方法及び情報処理装置

Publications (2)

Publication Number Publication Date
EP0911799A2 true EP0911799A2 (fr) 1999-04-28
EP0911799A3 EP0911799A3 (fr) 2000-05-31

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EP (1) EP0911799A3 (fr)
JP (1) JPH11119877A (fr)
KR (1) KR19990036446A (fr)
CN (1) CN1215198A (fr)

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EP1300824A2 (fr) * 2001-10-05 2003-04-09 Fujitsu Limited Dispositif d'affichage à cristal liquide et appareil èlectronique l'utilisant
GB2390468A (en) * 2002-07-01 2004-01-07 Chuntex Electronic Co Ltd Method and apparatus for adjusting brightness of an LCD display
WO2005010858A1 (fr) * 2003-07-21 2005-02-03 Eaton Power Quality Corporation Dispositif et procedes d'alimentation sans coupure utilisant un ecran a retroeclairage variable
CN109271014A (zh) * 2017-07-18 2019-01-25 华为终端（东莞）有限公司 一种调整屏幕亮度的方法及设备
EP3543996A4 (fr) * 2016-11-18 2020-07-08 Guangdong Wlight Visual Health Research Institute Procédé et appareil d'affichage pour un réglage dynamique des paramètres de luminescence d'un dispositif d'affichage
EP3664071A4 (fr) * 2017-09-21 2020-09-16 Samsung Electronics Co., Ltd. Dispositif électronique et procédé de prévention de détérioration de pixel
US11315521B2 (en) 2017-09-21 2022-04-26 Samsung Electronics Co., Ltd. Electronic device and method for brightness control of electronic device

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JP4627338B2 (ja) * 1999-07-29 2011-02-09 株式会社日立製作所 情報端末機器
US6618042B1 (en) 1999-10-28 2003-09-09 Gateway, Inc. Display brightness control method and apparatus for conserving battery power
JP3692869B2 (ja) 1999-11-18 2005-09-07 株式会社日立製作所 情報処理装置
US6982686B2 (en) * 2000-06-15 2006-01-03 Sharp Kabushiki Kaisha Liquid crystal display device, image display device, illumination device and emitter used therefore, driving method of liquid crystal display device, driving method of illumination device, and driving method of emitter
JP2002123208A (ja) 2000-10-13 2002-04-26 Nec Corp 画像表示装置およびその駆動方法
KR100414073B1 (ko) * 2001-10-31 2004-01-07 엘지전자 주식회사 휴대용 단말기의 화면 모드 설정 방법
JP2006047617A (ja) * 2004-08-04 2006-02-16 Hitachi Displays Ltd エレクトロルミネセンス表示装置およびその駆動方法
KR100810506B1 (ko) * 2006-10-17 2008-03-07 삼성전자주식회사 디스플레이장치
JP5288281B2 (ja) * 2007-11-01 2013-09-11 日本電気株式会社 輝度制御方法および表示装置
CN101441861B (zh) * 2007-11-23 2010-10-13 佛山市顺德区汉达精密电子科技有限公司 低亮度显示的装置及方法
TWI401666B (zh) 2008-02-19 2013-07-11 Hannstar Display Corp 對比度提昇方法
JP5293133B2 (ja) * 2008-12-10 2013-09-18 ソニー株式会社 画像表示装置
US8378960B2 (en) * 2009-08-13 2013-02-19 International Business Machines Corporation Apparatus, system, and method for controlling an electronic display
KR101989929B1 (ko) * 2012-08-13 2019-09-30 엘지디스플레이 주식회사 휴대용 정보 기기 및 이의 전력 제어 방법
JP6145265B2 (ja) * 2012-12-20 2017-06-07 矢崎総業株式会社 表示装置
CN103631359A (zh) * 2013-11-15 2014-03-12 联想(北京)有限公司 一种信息处理方法及电子设备
KR102596606B1 (ko) * 2016-08-31 2023-11-01 엘지디스플레이 주식회사 표시장치 및 그의 구동방법
CN112530345A (zh) * 2020-12-11 2021-03-19 深圳市创智成科技股份有限公司 一种显示屏亮度调节方法及笔记本电脑

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EP1300824A2 (fr) * 2001-10-05 2003-04-09 Fujitsu Limited Dispositif d'affichage à cristal liquide et appareil èlectronique l'utilisant
EP1300824A3 (fr) * 2001-10-05 2006-05-10 Fujitsu Limited Dispositif d'affichage à cristal liquide et appareil èlectronique l'utilisant
GB2390468A (en) * 2002-07-01 2004-01-07 Chuntex Electronic Co Ltd Method and apparatus for adjusting brightness of an LCD display
GB2390468B (en) * 2002-07-01 2004-05-19 Chuntex Electronic Co Ltd Method and apparatus for adjusting brightness of an LCD display
WO2005010858A1 (fr) * 2003-07-21 2005-02-03 Eaton Power Quality Corporation Dispositif et procedes d'alimentation sans coupure utilisant un ecran a retroeclairage variable
US7166930B2 (en) 2003-07-21 2007-01-23 Eaton Power Quality Corporation Uninterruptible power supply apparatus and methods using a display with variable backlighting
EP3543996A4 (fr) * 2016-11-18 2020-07-08 Guangdong Wlight Visual Health Research Institute Procédé et appareil d'affichage pour un réglage dynamique des paramètres de luminescence d'un dispositif d'affichage
CN109271014A (zh) * 2017-07-18 2019-01-25 华为终端（东莞）有限公司 一种调整屏幕亮度的方法及设备
CN109271014B (zh) * 2017-07-18 2022-04-22 华为终端有限公司 一种调整屏幕亮度的方法及设备
EP3664071A4 (fr) * 2017-09-21 2020-09-16 Samsung Electronics Co., Ltd. Dispositif électronique et procédé de prévention de détérioration de pixel
US11315521B2 (en) 2017-09-21 2022-04-26 Samsung Electronics Co., Ltd. Electronic device and method for brightness control of electronic device

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JPH11119877A (ja) 1999-04-30
KR19990036446A (ko) 1999-05-25
EP0911799A3 (fr) 2000-05-31
CN1215198A (zh) 1999-04-28

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