US Patent No. 10,973,100

LED LUMINANCE CONTROL CIRCUIT, LED LUMINANCE CONTROL METHOD, AND LED LUMINANCE CONTROL PROGRAM


Patent No. 10,973,100
Issue Date April 06, 2021
Title Led Luminance Control Circuit, Led Luminance Control Method, And Led Luminance Control Program
Inventorship Masumi Kanayama, Hakusan (JP)
Kunio Kawamura, Hakusan (JP)
Assignee EIZO Corporation, Hakusan (JP)

Claim of US Patent No. 10,973,100

1. An LED control circuit comprising an LED voltage generating unit, an LED voltage control unit, an LED current control unit, and a storage unit whereinthe LED voltage generating unit is configured to apply a voltage to an LED based on an LED voltage command value input from the LED voltage control unit,
the LED voltage control unit is configured to determine the LED voltage command value based on a cathode potential of the LED,
the LED current control unit is configured to control a value of current flowing through the LED based on the LED voltage command value,
the storage unit is configured to store a look-up table in which a correspondence relationship between luminance and the LED voltage command value is predetermined, and
the LED current control unit controls the value of current based on a desired luminance, the LED voltage command value in the lookup table corresponding to the desired luminance, and an actual LED voltage command value.