WO2012030017A1 - Procédé pour fixer la valeur cible d'une quantité de lumière d'un affichage et écran utilisant un tel procédé - Google Patents

Procédé pour fixer la valeur cible d'une quantité de lumière d'un affichage et écran utilisant un tel procédé Download PDF

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Publication number
WO2012030017A1
WO2012030017A1 PCT/KR2010/007218 KR2010007218W WO2012030017A1 WO 2012030017 A1 WO2012030017 A1 WO 2012030017A1 KR 2010007218 W KR2010007218 W KR 2010007218W WO 2012030017 A1 WO2012030017 A1 WO 2012030017A1
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WO
WIPO (PCT)
Prior art keywords
light quantity
quantity value
backlight
value
light
Prior art date
Application number
PCT/KR2010/007218
Other languages
English (en)
Korean (ko)
Inventor
이광노
이종호
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2012030017A1 publication Critical patent/WO2012030017A1/fr

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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
    • G09G3/36—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
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the present invention relates to a method for setting a target light quantity value of a display and a display apparatus using the method. More particularly, the present invention relates to a display apparatus using an illuminance sensor without a heat-run process for setting a target luminance value after display production. A method of setting a target light quantity value of a display capable of setting a target light quantity value of a display and a display apparatus using the method.
  • the display In order to set the target luminance value, the display is heat-rund during production of the display device, and the luminance of the display is measured using the luminance measuring equipment installed in the front of the display.
  • the light quantity value of the illuminance sensor corresponding to the target luminance value is stored and set in the memory.
  • the target luminance value since the target luminance value must be set by heat-running the display for a predetermined time (about 30 minutes), this causes a loss in the production process and does not actively cope with a decrease in performance due to the use time of the backlight.
  • the present invention has been made to solve the above-described problems, and is a target of a display that can set a target light quantity value of a display using an illumination sensor without a heat-run process for setting a target luminance value after display production. It is an object of the present invention to provide a light quantity value setting method and a display device using the method.
  • a display device is a display unit including a backlight module positioned on the rear of the display panel to supply the light amount, a backlight driver for controlling the light amount of the backlight module, the light amount of the backlight A light sensor to detect and output a voltage value, an A / D converter converting the output analog voltage value into a digital light amount value, and a difference between the light quantity value measured in the Nth order by the light sensor and (N-1) difference. If the measured light quantity value is the same, and includes a control unit for controlling to set the light quantity value measured in the N-th order to the initial target light quantity value.
  • the controller when the initial target light quantity value is set, the controller is configured to display the light quantity of the backlight unit in the backlight driving unit when the light quantity value measured by the illuminance sensor is greater than the initial target light quantity value during display driving. It is characterized in that for outputting a control command to reduce.
  • control unit outputs a control command to increase the amount of light of the backlight to the backlight driver when the light amount value measured by the illuminance sensor is less than the initial target light amount value when driving the display.
  • control unit when it is determined that the control unit does not increase the amount of light of the backlight and the light amount value measured in the M order by the illuminance sensor is the same as the light quantity value measured in the (M-1) difference
  • the control unit is configured to control the initial target light quantity value to be set to the light quantity value measured in the M-th order.
  • a method of setting a target light quantity value of a display includes measuring a backlight light quantity value through an illuminance sensor, and the difference between the light quantity value measured in the Nth order and the (N-1) difference. Determining whether the measured light quantity value is the same and, if the same, setting the light quantity value measured in the Nth order as an initial target light quantity value.
  • the method may further include outputting a control command to reduce the backlight light amount to the backlight driver when the currently measured light amount value is larger than the initial target light amount value.
  • the method may further include outputting a control command to increase the backlight light amount to the backlight driver.
  • the method may further include determining whether the measured light quantity values are the same and, if the same, correcting and setting the initial target light quantity value to the light quantity value measured at M order.
  • the loss in the production process can be prevented by not performing a 30-minute heat run process for setting a target luminance value after display production.
  • the backlight module automatically sets the saturation value as the target value, and then controls the display to reach the target light value set according to the measured light amount by using an illuminance sensor during display driving.
  • FIG. 1 is a block diagram illustrating a display apparatus using a method for setting a target light quantity value of a display according to an exemplary embodiment of the present invention.
  • FIG. 2 is a flowchart illustrating a method of setting an initial target light quantity value of a display according to an embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating a process of reaching a target light quantity value using an illuminance sensor according to an embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating a display apparatus using a method for setting a target light quantity value of a display according to an exemplary embodiment of the present invention.
  • the display apparatus 100 includes a light sensor 110, an A / D converter 120, a controller 130, a backlight driver 140, and a backlight module 151. ).
  • the illuminance sensor 110 detects the amount of light in the backlight and outputs it as a voltage value.
  • the illuminance sensor 110 may be mounted on the main circuit board to measure the amount of light of the backlight irradiated through the photodetection hole formed at the rear of the backlight module.
  • the A / D converter 120 receives an analog voltage value output from the illuminance sensor 110, converts the analog voltage value into a digital light quantity value, and outputs it to the controller 130.
  • the controller 130 sets the currently measured light quantity value as an initial target light quantity value. A method of controlling to set the initial target light quantity value will be described in detail with reference to FIG. 2.
  • the brightness of the backlight is gradually increased and then brightened and then lowered again to stabilize (saturate).
  • the controller 130 compares the light quantity measured by the illuminance sensor 110 and the set initial target light quantity value when the initial target light quantity value is set. In order to reach the initial target light amount value, a control command for reducing or increasing the light amount of the backlight is output to the backlight driver 140.
  • the backlight driver 140 controls the current output to the backlight module 151 according to the input control command so that the amount of light irradiated from the backlight module is stabilized to the initial target amount of light within a short time. Detailed description thereof will be described in detail with reference to FIG. 3.
  • the controller 130 may perform a function of correcting the set initial target light intensity value by determining a change in the light quantity measured by the illuminance sensor. Detailed description thereof will be described in detail with reference to FIG. 4.
  • FIG. 2 is a flowchart illustrating a method of setting an initial target light quantity value of a display according to an embodiment of the present invention.
  • the initial target light quantity value according to the target luminance value is not set.
  • Display devices for example, monitors
  • the controller may set a value at which the backlight is saturated as the initial target light amount value without having to perform a heat run in the production process to set the initial target light amount value.
  • the controller when power is applied to the display and driven, when it is determined that the target light quantity value is not set (S21), the controller measures the light quantity value through the illuminance sensor (S23).
  • the measured light quantity value may be temporarily stored in the memory.
  • the controller compares the currently measured light quantity value with a previously measured light quantity value and measures the light quantity repeatedly when it does not match (S25). Thereafter, the controller compares the light quantity value measured in the Nth order with the light quantity value measured in the (N-1) th and matches (S25), and determines that the backlight is saturated (stabilized) and initializes the light quantity value measured in the Nth order.
  • a target light quantity value is set (S27).
  • the loss in the production process can be prevented by setting the saturation value of the backlight to the initial target light quantity value without performing a heat run for setting the light quantity value according to the target luminance value of the display.
  • FIG. 3 is a flowchart illustrating a process of reaching a target light quantity value using an illuminance sensor according to an embodiment of the present invention.
  • the controller when power is applied to the display to drive the controller, when it is determined that the target light quantity value is set (S21 of FIG. 2), the controller measures the light quantity value through the illuminance sensor (S31).
  • the measured light quantity value may be temporarily stored in the memory.
  • the controller compares the currently measured light quantity value with a set target light quantity value and determines whether the brightness of the backlight can be reduced (S33) when it is determined that the currently measured light quantity value is large (S32). If it is determined that the brightness can be reduced, the controller outputs a control command for reducing the brightness by one step to the backlight driver in order to control to reach the set target light quantity value (S34).
  • the controller compares the currently measured light quantity value with a set target light quantity value and determines that the currently measured light quantity value is small (S35), and determines whether the brightness of the backlight can be increased (S36). If it is determined that the brightness can be increased, the controller outputs a control command for increasing the brightness by one step to the backlight driver in order to control to reach the set target light quantity value (S37).
  • the controller may control the display apparatus in which the initial target light quantity value is set to reach the initial target light quantity value within a short time during initial driving.
  • FIG. 4 is a flowchart illustrating a method of correcting and setting an initial target light quantity value of a display according to a backlight life time according to an embodiment of the present invention.
  • the controller determines that the currently measured light quantity value is small by comparing the currently measured light quantity value with the set target light quantity value, it is determined that the brightness of the backlight cannot be increased (S36 of FIG. 3).
  • the light quantity value is measured through the illuminance sensor (S41).
  • the controller compares the currently measured light quantity value with the previously measured light quantity value and measures the light quantity repeatedly when it does not match (S43). Thereafter, the controller compares the light quantity value measured in M order with the light quantity value measured in (M-1) and matches (S45), and determines that it is saturated (stabilized) according to the life of the backlight. The light quantity value measured in the M-th order is corrected and set (S47).
  • the controller may modify the target light quantity value when the brightness of the display decreases because the backlight module does not reach the initially set target light quantity value over time. Therefore, the controller may actively cope with the life of the backlight to correct the target light quantity value as the brightness of the backlight decreases with time.

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

Abstract

L'invention concerne un écran comprenant: une unité d'affichage pourvue d'un module de rétroéclairage situé sur la surface arrière d'un panneau d'affichage et qui produit une quantité de lumière; une unité de commande de rétroéclairage pour commander la quantité de lumière du module de rétroéclairage; un capteur de luminance pour détecter la quantité de lumière du rétroéclairage et la produire dans une valeur de tension; un convertisseur analogique-numérique pour convertir la valeur de tension analogique produite en une valeur de quantité de lumière numérique, et une unité de régulation pour réguler la valeur de quantité de lumière mesurée à N-dimension afin qu'une soit fixée à une valeur de quantité de lumière cible initiale lorsque la valeur de quantité de lumière mesurée à N-dimension au moyen du capteur de luminance est identique à la valeur de quantité de lumière mesurée à (N-1)-dimension. Le procédé selon l'invention consiste à fixer automatiquement la valeur à laquelle le module de rétroaction est saturé au moment du fonctionnement de l'affichage initial en tant que valeur cible, puis à la réguler de manière à atteindre la valeur de quantité de lumière préalablement fixée en fonction de la quantité de lumière mesurée par le capteur de luminance, puis à permettre une stabilisation rapide de l'intensité lumineuse de l'affichage.
PCT/KR2010/007218 2010-08-30 2010-10-21 Procédé pour fixer la valeur cible d'une quantité de lumière d'un affichage et écran utilisant un tel procédé WO2012030017A1 (fr)

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Application Number Priority Date Filing Date Title
KR10-2010-0084281 2010-08-30
KR1020100084281A KR101693384B1 (ko) 2010-08-30 2010-08-30 디스플레이의 목표 광량값 설정방법 및 그 방법을 이용한 디스플레이 장치

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WO2012030017A1 true WO2012030017A1 (fr) 2012-03-08

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Publication number Priority date Publication date Assignee Title
BR112019022210A2 (pt) 2017-05-12 2020-05-12 Samsung Electronics Co., Ltd. Aparelho eletrônico
KR102544047B1 (ko) * 2018-05-03 2023-06-16 삼성전자주식회사 디스플레이장치 및 그 제어방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332386A (ja) * 1993-05-21 1994-12-02 Keibunshiya:Kk 液晶表示装置
JPH10222129A (ja) * 1997-02-03 1998-08-21 Nanao Corp 液晶表示装置用バックライトの輝度制御装置
KR20060051657A (ko) * 2004-10-08 2006-05-19 소니 가부시끼 가이샤 엘이디 구동 장치와 발광량 제어 방법
KR20080056618A (ko) * 2006-12-18 2008-06-23 엘지디스플레이 주식회사 Ｌｅｄ 백 라이트 시스템 및 그의 초기 설정방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080018570A (ko) * 2006-08-25 2008-02-28 삼성전자주식회사 백라이트 구동부, 그 구동방법 및 이를 갖는 표시장치
JP5660755B2 (ja) * 2007-11-02 2015-01-28 株式会社ジャパンディスプレイ 表示装置および表示制御方法ならびに電子機器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332386A (ja) * 1993-05-21 1994-12-02 Keibunshiya:Kk 液晶表示装置
JPH10222129A (ja) * 1997-02-03 1998-08-21 Nanao Corp 液晶表示装置用バックライトの輝度制御装置
KR20060051657A (ko) * 2004-10-08 2006-05-19 소니 가부시끼 가이샤 엘이디 구동 장치와 발광량 제어 방법
KR20080056618A (ko) * 2006-12-18 2008-06-23 엘지디스플레이 주식회사 Ｌｅｄ 백 라이트 시스템 및 그의 초기 설정방법

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KR20120020586A (ko) 2012-03-08
KR101693384B1 (ko) 2017-01-06

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