Patent ID: 8466860
Filing Date: 2013-06-18
Classification: G02F,G09G

Abstract:
1. A transflective liquid crystal display (LCD) device comprising an LCD panel including an array of pixels each having a reflective area and a transmissive area in a liquid crystal (LC) layer, and a drive circuit for driving said reflective area and said transmissive area of said LC layer by using an inverting drive scheme, wherein said reflective area is a normally white display which becomes a bright state when a drive voltage is a bright-state setup voltage and becomes a dark state when the drive voltage is a dark-state setup voltage larger than the bright-state setup voltage, and said transmissive area is a normally black display which becomes a dark state when the drive voltage is a dark-state setup voltage and becomes a bright state when the drive voltage is a bright-state setup voltage larger than the dark-state setup voltage, wherein characteristics of reflectance of said reflective area with respect to a value of [Vr(K)−Vr] and characteristics of transmittance of said transmissive area with respect to a value of [Vt−Vt(K)] substantially match each other, where Vr and Vt are drive voltages of said LC layer in said reflective area and transmissive area, respectively, Vr(K) is a dark-state setup voltage in said reflective area, and Vt(K) is a dark-state setup voltage in said transmissive area; and wherein: a first common electrode and a first pixel electrode in said reflective area are comb teeth electrodes and are disposed in such a manner that teeth of said first common electrode and teeth of said first pixel electrode are alternately aligned with a clearance Lr in an alignment direction, a second common electrode and a second pixel electrode in said transmissive area are comb teeth electrodes and are disposed in such a manner that teeth of said second common electrode and teeth of said second pixel electrode are alternately aligned with a clearance Lt in an alignment direction, and Lt is greater than Lr, wherein α(R) is 25° where α(R) is an angle formed between a direction in which said teeth of said first common electrode and said first pixel electrode in said reflective area extend and a rubbing direction for said LC, wherein α(T) ranges from 15° to 25° where α(T) is an angle formed between a direction in which said teeth of said second common electrode and said second pixel electrode in said transmissive area extend and said rubbing direction for said LC.