Single pixel driver for transflective LCD
View Patent ↗A single pixel driving circuit for a transflective LCD is disclosed. It uses different digital/analog (D/A) signal converters to control the gamma correction signals of the transmissive liquid crystal capacitor and the reflective liquid crystal capacitor to improve the display quality of the transflective LCD. The driving circuit contains a first transistor and a second transistor whose gates couple together to a scan line, a first signal converter coupled to the source of the first transistor via a first data line, and a second signal converter coupled to the source of the second transistor via a second data line. The drain of the first transistor is coupled to the transmissive liquid crystal capacitor. The drain of the second transistor is coupled to the reflective liquid crystal capacitor.
1. A single pixel driving circuit for transflective liquid crystal displays (LCDs), the single pixel having a transmissive liquid crystal capacitor and a reflective liquid crystal capacitor, the single pixel driving circuit comprising:
a first transistor, which has a gate, a source and a drain;
a second transistor, which has a gate, a source and a drain;
a first signal converter, which is coupled to the source of the first transistor via a first data line; and
a second signal converter, which is coupled to the source of the second transistor via a second data line;
wherein the drain of the first transistor is coupled to the transmissive liquid crystal capacitor and the drain of the second transistor is coupled to the reflective liquid crystal capacitor.
2. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the first data line controls the switching of the first transistor to drive the transmissive liquid crystal capacitor.
3. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the second data line controls the switching of the second transistor to drive the reflective liquid crystal capacitor.
4. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the first transistor is a thin film transistor (TFT).
5. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the second transistor is a thin film transistor (TFT).
6. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the first signal converter is a digital/analog (D/A) converter.
7. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the second signal converter is a digital/analog (D/A) signal converter.
8. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the transmissive liquid crystal capacitor is further connected in parallel with a storage capacitor.
9. The single pixel driving circuit for transflective LCDs of claim 1 , wherein the reflective liquid crystal capacitor is further connected in parallel with a storage capacitor.