EP 1546794 A2 20050629 - PULSE WIDTH MODULATED DISPLAY WITH HYBRID CODING
Title (en)
PULSE WIDTH MODULATED DISPLAY WITH HYBRID CODING
Title (de)
IMPULSBREITENMODULIERTE ANZEIGE MIT HYBRIDCODIERUNG
Title (fr)
AFFICHAGE A MODULATION D'IMPULSION EN DUREE AVEC CODAGE HYBRIDE
Publication
Application
Priority
- US 0325119 W 20030811
- US 40319002 P 20020813
- US 35452803 A 20030130
Abstract (en)
[origin: WO2004015981A2] A field sequential pulse width modulated display system (10) comprises a digital micromirror device (DMD) (24) having a plurality of micromirrors that each selectively reflect light to illuminate a corresponding pixel. A driver circuit (30) controls the DMD (24) responsive to sequences of pulse width segments formed by a processor (31). The processor (31) increases the pixel brightness by actuating selected pulses such that within a first range of brightness levels between first and second pixel brightness boundaries, a first large-duration pulse (or combination of pulses) becomes actuated to reach the second pixel brightness boundary, and within a second range of pixel brightness levels between second and third pixel brightness boundaries, the first large duration pulse (or combination of pulses) remains actuated. Upon reaching the third pixel brightness boundary, a second large duration pulse (or combination of pulses) now becomes actuated with the first large duration pulse (or combination of pulses) remaining actuated. Forming the pulse width segments in this manner serves to reduce motion contouring.
IPC 1-7
IPC 8 full level
G09G 3/34 (2006.01); H04N 9/31 (2006.01); G09G 3/20 (2006.01)
CPC (source: EP KR)
G02F 1/03 (2013.01 - KR); G02F 1/07 (2013.01 - KR); G09G 3/346 (2013.01 - EP); H04N 9/3123 (2013.01 - EP); G09G 3/2018 (2013.01 - EP); G09G 2310/0235 (2013.01 - EP); G09G 2320/0242 (2013.01 - EP)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 2004015981 A2 20040219; WO 2004015981 A3 20050414; AU 2003265408 A1 20040225; AU 2003265408 A8 20040225; CN 100396105 C 20080618; CN 1685276 A 20051019; EP 1546794 A2 20050629; EP 1546794 A4 20070307; JP 2006508378 A 20060309; KR 101015029 B1 20110216; KR 20050050644 A 20050531; MX PA05001668 A 20050419
DOCDB simple family (application)
US 0325119 W 20030811; AU 2003265408 A 20030811; CN 03819194 A 20030811; EP 03785185 A 20030811; JP 2004528034 A 20030811; KR 20057002532 A 20030811; MX PA05001668 A 20030811