TRANSFLECTIVE TYPE LCD DEVICE HAVING EXCELLENT IMAGE QUALITY
First Claim
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, 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.
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Accused Products
Abstract
An LCD device has a reflective area that reflects light incident from a polarizing film side using a reflection film, and a transmissive area that transmits light of a backlight incident from a TFT substrate side. The drive voltages of the reflective area and transmissive area are Vr and Vt, the black voltage in the reflective area is Vr (K), the black voltage in the transmissive area is Vt (K). The reflectance R, the transmittance T, characteristics of R with respect to drive voltage [Vr(K)-Vr] and characteristics of T with respect to drive voltage [Vt-Vt (K)] substantially match each other.
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Citations
5 Claims
- 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, 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.
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5. 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 drive circuit drives said reflective area and said transmissive area by using drive voltages Vr and Vt, respectively, said reflective area has a dark-state setup voltage Vr(K) and a bright-state setup voltage Vr(W), and said transmissive area having a dark-state setup voltage Vt(K) and a bright-state setup voltage Vt(W); a first characteristic curve for reflectance of said reflective area with respect to a value of [Vr (K)-Vr] and a second characteristic curve for transmittance of said transmissive area with respect to a value of [Vt-Vt (K)] have therebetween a relationship such that; a slope of said first characteristic curve in a vicinity of said Vr(K), a slope of said first characteristic curve in a vicinity of said Vr(W), a slope of said second characteristic curve in a vicinity of said Vt(K), and a slope in a vicinity of said St(W) substantially match one another.
- an LCD panel including an array of pixels each having a reflective area and a transmissive area in a liquid crystal (LC) layer; and
Specification