Liquid crystal display and method of manufacturing the same
View Patent ↗A liquid crystal display includes a first substrate including pixels, each having a transmissive area and a reflective area, a second substrate, and a liquid crystal layer disposed between the first and second substrates. Each of the pixels includes first and second thin film transistors which output a data signal in response to a first gate signal, a transmissive pixel electrode disposed in the transmissive area and electrically connected to the first thin film transistor to charge a first pixel voltage based on the data signal, a reflective pixel electrode disposed in the reflective area and electrically connected to the second thin film transistor to charge a second pixel voltage based on the data signal, and a voltage controller which controls the first pixel voltage and the second pixel voltage in response to a second gate signal, which is generated after the first gate signal.
1. A liquid crystal display comprising:
a first substrate including pixels, each of which includes a transmissive area and a reflective area;
a second substrate disposed opposite the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate, wherein each of the pixels comprises:
a first thin film transistor and a second thin film transistor which both output a data signal in response to a first gate signal;
a transmissive pixel electrode disposed in the transmissive area and electrically connected to the first thin film transistor to charge a first pixel voltage based on the data signal;
a reflective pixel electrode disposed in the reflective area and electrically connected to the second thin film transistor to charge a second pixel voltage based on the data signal; and
a voltage controller which controls the first pixel voltage and the second pixel voltage in response to a second gate signal,
wherein the second gate signal is generated after the first gate signal.
2. The liquid crystal display of claim 1 , wherein a cell gap of the transmissive area is greater than or equal to a cell gap of the reflective area.
3. The liquid crystal display of claim 1 , further comprising:
a first gate line which receives the first gate signal;
a second gate line which receives the second gate signal; and
a data line which receives the data signal.
4. The liquid crystal display of claim 3 , wherein
the first gate line is connected to a first pixel of the pixels,
the second gate line is connected to a second pixel, adjacent to the first pixel, of the pixels, and
the voltage controller receives the second gate signal through the second gate line.
5. The liquid crystal display of claim 1 , wherein the voltage controller comprises:
a third thin film transistor including a source electrode connected to a drain electrode of the second thin film transistor and which outputs a voltage control signal in response to the second gate signal;
a charge dividing electrode connected to a drain electrode of the third thin film transistor and which is charged with the voltage control signal; and
a storage line which overlaps at least a portion of the charge dividing electrode to form a first capacitor which controls the first pixel voltage and the second pixel voltage.
6. The liquid crystal display of claim 1 , wherein the voltage controller comprises:
a third thin film transistor including a source electrode connected to the reflective pixel electrode and which outputs a voltage control signal in response to the second gate signal;
a charge dividing electrode connected to a drain electrode of the third thin film transistor and which is charged with the voltage control signal; and
a storage line which overlaps at least a portion of the charge dividing electrode to form a first capacitor which controls the first pixel voltage and the second pixel voltage.
7. The liquid crystal display of claim 1 , wherein the second substrate comprises:
a color filter layer; and
a transparent organic layer disposed in a first area of the color filter layer such that a thickness of the first area is less than a thickness of a second area, different from the first area, of the color filter layer.
8. The liquid crystal display of claim 1 , wherein
the second substrate comprises a color filter layer, and
the color filter layer includes at least one penetrating hole formed therethrough at an area corresponding to the reflective area of a corresponding pixel of the pixels.
9. The liquid crystal display of claim 8 , wherein a cell gap of the area at which the penetrating hole is formed is greater than a cell gap of another area of the color filter layer.
10. The liquid crystal display of claim 1 , wherein the second substrate comprises:
a common electrode which forms an electric field with the transmissive pixel electrode and the reflective pixel electrode; and
at least one dividing pattern disposed on at least one of the transmissive pixel electrode, the reflective pixel area and the common electrode, wherein the at least one dividing pattern divides the liquid crystal layer into domains.
11. The liquid crystal display of claim 10 , wherein the domains have different areas.
12. The liquid crystal display of claim 1 , wherein the reflective pixel electrode comprises a concavo-convex portion.
13. The liquid crystal display of claim 1 , further comprising:
a first polarizer disposed on an outer surface of the first substrate;
a second polarizer disposed on an outer surface of the second substrate; and
at least one phase retardation film disposed at least one of between the first substrate and the first polarizer and between the second substrate and the second polarizer.
14. The liquid crystal display of claim 13 , wherein at least one of the first polarizer, the second polarizer and the at least one phase retardation film comprises an anti-glare portion disposed thereon.
15. A liquid crystal display comprising:
a first substrate comprising pixels, each of which includes a transmissive area and a reflective area;
a second substrate facing the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate,
wherein
each pixel comprises:
a first thin film transistor which outputs a first data signal in response to a gate signal;
a second thin film transistor which outputs a second data signal in response to the gate signal;
a transmissive pixel electrode disposed in the transmissive area and connected to the first thin film transistor, and which charges a first pixel voltage in response to the first data signal; and
a reflective pixel electrode disposed in the reflective area and connected to the second thin film transistor and which charges a second pixel voltage different from the first pixel voltage in response to the second data signal, and
the second substrate comprises:
a common electrode which forms an electric field with the transmissive pixel electrode and the reflective pixel electrode; and
at least one dividing pattern disposed on at least one of the transmissive pixel electrode, the reflective pixel electrode and the common electrode to divide the liquid crystal layer into domains.
16. The liquid crystal display of claim 15 , wherein a cell gap of the transmissive area is greater than or equal to a cell gap of the reflective area.
17. The liquid crystal display of claim 15 , further comprising:
a first sub-thin film transistor which outputs a first sub-data signal in response to the gate signal; and
a voltage controller connected to the first sub-thin film transistor, wherein the transmissive pixel electrode comprises:
a first transmissive pixel electrode connected to a drain electrode of the first thin film transistor to charge a first transmissive pixel voltage; and
a second transmissive pixel electrode spaced apart from the first transmissive pixel electrode and connected to the first sub-thin film transistor to charge a second transmissive pixel voltage,
wherein the voltage controller controls the first transmissive pixel voltage and the second transmissive pixel voltage in response to a next gate signal of a next pixel generated after the gate signal.