Pixel unit and display panel having the same

1. A display panel comprising:

a first display substrate comprising a pixel unit having a pixel portion configured to display a color and a transmissive portion configured to transmit light and to not display the color;

a second display substrate configured to face the first display substrate; and

a liquid crystal layer disposed between the first display substrate and the second display substrate,

wherein the pixel portion is disposed at a central portion of the pixel unit and the transmissive portion is disposed at a peripheral portion adjacent to the central portion, or the transmissive portion is disposed at the central portion of the pixel unit and the pixel portion is disposed at the peripheral portion adjacent to the central portion,

wherein the peripheral portion surrounds the central portion,

wherein the first display substrate further comprises a first base substrate and a first electrode,

wherein the second display substrate comprises a second base substrate and a second electrode, the second electrode facing the pixel unit,

wherein the first display substrate or the second display substrate comprises a thin film transistor, a data line, and a gate line,

wherein the first and second electrodes overlap the pixel portion and the transmissive portion, and

wherein a transmissive portion of the second electrode is configured to face the transmissive portion of the pixel unit such that light passing through the transmissive portion of the pixel unit and the first display substrate passes through the transmissive portion of the second electrode and the second display substrate without displaying the color.

2. The display panel of claim 1 , wherein the peripheral portion comprises a first space to accommodate the thin film transistor and a second space to accommodate a portion of the data line or a portion of the gate line, and each of the first space and the second space is formed at a corner of the peripheral portion.

3. The display panel of claim 2 , wherein the pixel unit comprises a connector at the first space to connect the pixel unit and the thin film transistor.

4. The display panel of claim 1 , wherein one of the pixel portion and the transmissive portion in the central portion has a quadrilateral shape.

5. The display panel of claim 1 , wherein one of the pixel portion and the transmissive portion in the central portion has a rhombic shape.

6. The display panel of claim 5 , wherein the pixel portion has the rhombic shape, and at least one vertex of the pixel portion makes contact with a side of the pixel unit.

7. The display panel of claim 1 , wherein one of the pixel portion and the transmissive portion in the central portion has a parallelogrammic shape.

8. The display panel of claim 7 , wherein the pixel portion has the parallelogrammic shape, and at least one side of the pixel portion overlaps with a side of the pixel unit.

9. The display panel of claim 1 , wherein the pixel portion has a polygonal shape, and at least one side of the pixel portion overlaps with a side of the pixel unit.

10. The display panel of claim 1 , wherein the first display substrate comprises a color filter comprising a main pixel having the pixel unit, and the main pixel comprises multiple pixel units having a pixel portion and a transmissive portion.

11. The display panel of claim 1 , wherein the color filter has a hole as the transmissive portion to accommodate a transmissive material.

12. The display panel of claim 1 , wherein the area of the transmissive portion is in a range of about 90% to about 110% of the area of the pixel portion.

13. The display panel of claim 1 , wherein

the first display substrate or the second display substrate comprises a protecting film, an ohmic contact layer, a semiconductor layer and a gate insulation film,

the gate line is perpendicular to the data line, and

the thin film transistor is connected to the data line, the gate line and the pixel unit.

14. The display panel of claim 1 , wherein the first electrode, the second electrode, the data line, and the gate line comprise indium tin oxide (ITO) or graphene, so that light transmits the first electrode, the second electrode, the data line, and the gate line.

15. A display panel comprising:

a first display substrate comprising a pixel unit having a pixel portion configured to display a color and a transmissive portion configured to transmit light and to not display the color, the first display substrate further comprising a first electrode disposed on the pixel portion and the transmissive portion;

a second display substrate configured to face the first display substrate; and

a liquid crystal layer disposed between the first display substrate and the second display substrate,

wherein the pixel portion is disposed at a central portion of the pixel unit and the transmissive portion is disposed at a peripheral portion adjacent to the central portion, or the transmissive portion is disposed at the central portion of the pixel unit and the pixel portion is disposed at the peripheral portion adjacent to the central portion,

wherein the peripheral portion surrounds the central portion,

wherein the second display substrate comprises a second electrode, a transmissive portion of the second electrode facing the pixel portion and the transmissive portion of the pixel unit, and

wherein the transmissive portion of the second electrode is configured to face the transmissive portion of the pixel unit such that light passing through the transmissive portion of the pixel unit and the first display substrate passes through the transmissive portion of the second electrode and the second display substrate without displaying the color.