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MX2012000125A - Dispositivo de visualizacion de cristal liquido. - Google Patents

Dispositivo de visualizacion de cristal liquido.

Info

Publication number
MX2012000125A
MX2012000125A MX2012000125A MX2012000125A MX2012000125A MX 2012000125 A MX2012000125 A MX 2012000125A MX 2012000125 A MX2012000125 A MX 2012000125A MX 2012000125 A MX2012000125 A MX 2012000125A MX 2012000125 A MX2012000125 A MX 2012000125A
Authority
MX
Mexico
Prior art keywords
led
image quality
liquid crystal
crystal display
display device
Prior art date
Application number
MX2012000125A
Other languages
English (en)
Inventor
Kohji Iwasaki
Motoyuki Oniki
Original Assignee
Sharp Kk
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 Sharp Kk filed Critical Sharp Kk
Publication of MX2012000125A publication Critical patent/MX2012000125A/es

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
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133613—Direct backlight characterized by the sequence of light sources
    • 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
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

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)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Se describe un dispositivo de visualización de cristal líquido con una luz posterior (fuente de luz) de LED. En el dispositivo de LCD, la iluminancia de la calidad de imagen es controlada a través de la combinación de la modulación del ancho de impulso (PWM) y el control de corriente, reduciendo el consumo de energía eléctrica asociado con el encendido de un LED. En la luz posterior de LED (10), la iluminancia de emisión de luz de LED es controlada por ambas PWM, lo cual modifica un ciclo de trabajo que indica el tiempo de iluminación por ciclo de un impulso, lo cual a su vez enciende/apaga el LED, y también por control de corriente, el cual selecciona el valor de la corriente suministrada al LED desde una pluralidad de valores fijos. Al menos una de la pluralidad de valores fijos es un valor de corriente predeterminado al cual el ciclo de trabajo alcanza un valor máximo al valor de luminancia máximo usado en un modo de calidad de imagen específica de los modos de calidad de imagen establecidos en el dispositivo de visualización de cristal líquido (1). En el modo de calidad de imagen especificado anteriormente, el valor de iluminancia más grande usado es más pequeño que al menos el valor de iluminancia más grande usado en los otros modos de calidad de imagen especificados.
MX2012000125A 2009-07-07 2010-07-06 Dispositivo de visualizacion de cristal liquido. MX2012000125A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009160780 2009-07-07
JP2010153312A JP4686644B2 (ja) 2009-07-07 2010-07-05 液晶表示装置
PCT/JP2010/061450 WO2011004809A1 (ja) 2009-07-07 2010-07-06 液晶表示装置

Publications (1)

Publication Number Publication Date
MX2012000125A true MX2012000125A (es) 2012-02-21

Family

ID=43429233

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2012000125A MX2012000125A (es) 2009-07-07 2010-07-06 Dispositivo de visualizacion de cristal liquido.

Country Status (8)

Country Link
US (1) US8797253B2 (es)
EP (1) EP2453296A4 (es)
JP (1) JP4686644B2 (es)
CN (1) CN102498507B (es)
BR (1) BR112012000172A2 (es)
MX (1) MX2012000125A (es)
RU (1) RU2012104007A (es)
WO (1) WO2011004809A1 (es)

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WO2021038794A1 (ja) * 2019-08-29 2021-03-04 三菱電機株式会社 Ｌｅｄ表示装置
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Also Published As

Publication number Publication date
BR112012000172A2 (pt) 2019-09-24
US8797253B2 (en) 2014-08-05
RU2012104007A (ru) 2013-08-20
WO2011004809A1 (ja) 2011-01-13
US20120105515A1 (en) 2012-05-03
EP2453296A4 (en) 2012-12-19
CN102498507A (zh) 2012-06-13
JP4686644B2 (ja) 2011-05-25
EP2453296A1 (en) 2012-05-16
CN102498507B (zh) 2014-09-10
JP2011034071A (ja) 2011-02-17

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