Liquid crystal display having electrically floating thin film transistor within sub pixel unit
View Patent ↗An LCD includes data lines, gate lines intersecting with the data lines, and pixel units. Each pixel unit is defined by a minimal area formed by two adjacent data lines and two adjacent gate lines. Each pixel unit includes a first sub pixel unit and a second sub pixel unit. The first sub pixel unit includes a first thin film transistor (TFT) and a first pixel electrode. The second sub pixel unit includes a second TFT and a second pixel electrode. A gate electrode of the first TFT is connected to the gate line, a source electrode of the first TFT is connected to the data line. A source electrode of the second TFT is connected to a same data line, and a gate electrode of the second TFT is electrically floating.
1. A liquid crystal display (LCD), comprising:
a plurality of data lines;
a plurality of gate lines intersecting the data lines; and
a plurality of pixel units, each pixel unit being at least partially surrounded by an adjacent data line adjacent to a side of the pixel unit and an adjacent gate line adjacent to another side of the pixel unit, each pixel unit comprising:
a first sub pixel unit comprising:
a first pixel electrode; and
a first thin film transistor (TFT) having a first gate electrode connected to the adjacent gate line, a first source electrode connected to the adjacent data line, and a first drain electrode connected to the first pixel electrode; and
a second sub pixel unit comprising:
a second pixel electrode; and
a second TFT having a second source electrode coupling to the adjacent data line, a second drain electrode connected to the second pixel electrode, and a second gate electrode electrically floating.
2. The LCD of claim 1 , wherein each second sub pixel unit further comprises a third TFT having a third gate electrode connected to the adjacent gate line, a third source electrode connected to the adjacent data line, and a third drain electrode connected to the second source electrode.
3. The LCD of claim 1 , wherein each first sub pixel unit further comprises a common electrode and liquid crystal sandwiched between the common electrode and the first pixel electrode, wherein the common electrode, the liquid crystal, and the first pixel electrode constitute a first liquid crystal capacitor.
4. The LCD of claim 3 , wherein each first sub pixel unit further comprises a first storage capacitor electrically connected to the first liquid crystal capacitor in parallel.
5. The LCD of claim 3 , wherein each second sub pixel unit further comprises a common electrode, and liquid crystal sandwiched between the common electrode and the second pixel electrode, wherein the common electrode, the liquid crystal, and the second pixel electrode constitute a second liquid crystal capacitor.
6. The LCD of claim 5 , wherein each second sub pixel unit further comprises a second storage capacitor electrically connected to the second liquid crystal capacitor in parallel.
7. The LCD of claim 1 , wherein the second source electrode is connected to the first drain electrode so as to couple to the adjacent data line via the first TFT.