Method and apparatus for adjusting brightness of an LCD display

A method for adjusting the brightness of an LCD display has the steps of: (a) dividing an adjustable brightness range of the LCD display into three stages, a high brightness stage, a normal brightness stage and a low brightness stage, (b) determining which stage of said three stages has corresponded...

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Bibliographic Details
Main Authors CHUNG-MING LENG, YU-PING LING
Format Patent
LanguageEnglish
Published 07.01.2004
Edition7
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
SEALS
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Summary:A method for adjusting the brightness of an LCD display has the steps of: (a) dividing an adjustable brightness range of the LCD display into three stages, a high brightness stage, a normal brightness stage and a low brightness stage, (b) determining which stage of said three stages has corresponded to a brightness adjust command, (c) adjusting luminance intensity of an LCD panel or luminance intensity of a lamp based on the brightness adjust command. An apparatus for performing the method has a microprocessor (10) to receive the brightness adjust command, a PWM unit (20) coupled to the microprocessor (10) to adjust the current intensity of the lamp, and a voltage level controller (40) coupled to the microprocessor (10) to adjust the voltage level applied on the LCD panel (50).
Bibliography:Application Number: GB20020019526