Invention Grant
US09024932B2 DC-DC converter with auto-switching between PWM and PFM and OLED display using the same
有权
DC-DC转换器在PWM和PFM之间自动切换，OLED显示屏采用相同的方式
- Patent Title: DC-DC converter with auto-switching between PWM and PFM and OLED display using the same
- Patent Title (中): DC-DC转换器在PWM和PFM之间自动切换，OLED显示屏采用相同的方式
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Application No.: US12836362Application Date: 2010-07-14
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Publication No.: US09024932B2Publication Date: 2015-05-05
- Inventor: Lin-Chien Chen , Ming-Chien Li
- Applicant: Lin-Chien Chen , Ming-Chien Li
- Applicant Address: TW Hsinchu
- Assignee: Orise Technology Co., Ltd.
- Current Assignee: Orise Technology Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: TW98125779A 20090731
- Main IPC: G09G5/00
- IPC: G09G5/00 ; H02M3/156 ; G09G3/20 ; G09G3/32
Abstract:
A DC-DC converter with auto-switching between pulse width modulation (PWM) and pulse frequency modulation (PFM) is used in an organic light emitting diode (OLED) display and judges power consumption of an OLED array of the display according to display data of the display and thus determines a switching time between PWM and PFM. The converter comprises a content statistic unit, an auto-switching control unit, a PWM controller, a PFM controller and a power generator. The content statistic unit receives and accumulates the display data of the OLED display and then outputs a statistic value. The auto-switching control unit outputs a control signal according to the statistic value to control the PWM controller and the PFM controller and to switch to a PWM mode or a PFM mode.
Public/Granted literature
- US20110025673A1 DC-DC CONVERTER WITH AUTO-SWITCHING BETWEEN PWM AND PFM AND OLED DISPLAY USING THE SAME Public/Granted day:2011-02-03
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