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31.2: Power Efficient 5.0‐inch 440ppi Full HD a‐Si TFT LCD Single‐Chip Driver IC
Author(s) -
Na YoungSun,
Kim DongSeok,
Kim HyunHo,
Kim HyunChul,
Moon JaeWook,
Lee HyeongSoo,
Sohn BoIk
Publication year - 2013
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2013.tb06228.x
Subject(s) - capacitive sensing , liquid crystal display , electrical engineering , power (physics) , chip , cmos , electronic circuit , charge pump , converters , voltage , materials science , engineering , electronic engineering , optoelectronics , capacitor , physics , quantum mechanics
We have developed the single chip driver system for 5.0‐inch 1080RGBx1920 FHD with 440ppi a‐Si TFT LCD panel for high‐end smart phone applications. Capacitive Charge‐Pump and inductive PFM (Pulse Frequency Modulated) combined new type of DC‐DC converter architecture has been proposed for the GIP (Gate Circuits In the Panel) turning on/off powers, or VGH and VGL, to develop successful and power efficient single chip driver IC. The measured results show that the proposed combined DC‐DC converter has the merits of stable and over 23% power saving effect in comparison with the conventional capacitive Charge‐Pump only or inductive PFM only DC‐DC converters, respectively.