Optics: measuring and testing – Photometers – Pupillary
Patent
1998-11-06
2000-10-31
Font, Frank G.
Optics: measuring and testing
Photometers
Pupillary
351211, 351221, G01J 160, A61B 310
Patent
active
061410926
ABSTRACT:
Disclosed is a method for measuring a flicker level. The method includes the steps of applying a first voltage to a liquid crystal display panel, the LCD panel including liquid crystal material and varying in transmissivity of light according to voltage applied to the liquid crystal material, such that light passing through the liquid crystal material is emitted from the LCD panel; detecting brightness of the light emitted from the LCD panel; determining a maximum brightness value and a minimum brightness value; and introducing the maximum brightness values and the minimum brightness value into a retina responsiveness function according to the brightness to attain flicker level values. The retina responsiveness function is a function of a strength of light passing through the pupil of the human eye. An inventive apparatus for measuring a flicker level includes a brightness detector for detecting brightness of light emitted from a liquid crystal display panel; a max/min brightness measuring portion for receiving input of brightness values from the brightness detector and determining a maximum brightness value and a minimum brightness value; and a flicker level measuring portion for attaining flicker level values by introducing the maximum and minimum brightness values input from the max/min brightness measuring portion into a retina responsiveness function according to brightness.
REFERENCES:
patent: 5276539 (1994-01-01), Humphrey
Font Frank G.
Punnoose Roy M.
Samsung Electronics Co,. Ltd.
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