Pulse width modulation method of LED driving integrated circuit

The invention discloses a pulse width modulation method of an LED driving integrated circuit. According to the pulse width modulation method, at least one comparator and a pulse counter are adopted, wherein the comparator is used for comparing a luminance control signal with an output value of the p...

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Bibliographic Details
Main Author HE SHUZHUAN
Format Patent
LanguageChinese
English
Published 09.10.2013
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:The invention discloses a pulse width modulation method of an LED driving integrated circuit. According to the pulse width modulation method, at least one comparator and a pulse counter are adopted, wherein the comparator is used for comparing a luminance control signal with an output value of the pulse counter with the same bits, outputting a luminance control signal with the specific pulse width, then using the luminance control signal to control the diode driving circuit, and enabling external LEDs to emit light with different luminance. The output data of the pulse counter are arranged according to rules. The number N of times for connecting and disconnecting a diode in a fixed period of time is increased. In the fixed period of time, the number N of the times for connecting and disconnecting the diode meets the requirement that N=f[the value of the luminance control signal with the specific pulse width/the luminance control signal value], wherein the f[x] is an entire function. According to the pulse wid
Bibliography:Application Number: CN201310274389