Display substrate, display panel having the same and method of manufacturing the same

A display panel, comprising:

• an upper substrate;
• a lower substrate facing the upper substrate;
• and
• a liquid crystal layer disposed between the upper substrate and the lower substrate,
• wherein the upper substrate comprises:
• an upper base substrate;
• a reflection controlling layer disposed on the upper base substrate;
• a metal wiring layer disposed on the reflection controlling layer;
• and
• a first insulation layer disposed on the metal wiring layer,
• wherein the lower substrate comprises:
• a lower base substrate;
• a pixel switching element disposed on the lower base substrate;
• and
• a second insulation layer disposed on the pixel switching element, and
• wherein the liquid crystal layer is disposed between the first insulation layer and the is second insulation layer, the reflection controlling layer being configured to provide a reflectance of reflected light corresponding to a wavelength using destructive interference, the reflected light being reflected from the metal wiring layer through the base substrate and the reflection controlling layer.

A display apparatus, comprising:

• a display panel comprising an upper substrate, a lower substrate facing the upper substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate;
• and
• a backlight unit configured to provide light to the display panel,
• wherein the upper substrate comprises:
• an upper base substrate;
• a reflection controlling layer disposed on the upper base substrate;
• a metal wiring layer disposed on the reflection controlling layer;
• and
• a first insulation layer disposed on the metal wiring layer,
• wherein the lower substrate comprises:
• a lower base substrate;
• a pixel switching element disposed on the lower base substrate;
• and
• a second insulation layer disposed on the pixel switching element, and
• wherein the liquid crystal layer is disposed between the first insulation layer and the second insulation layer, the reflection controlling layer being configured to provide a reflectance of reflected light corresponding to a wavelength using destructive interference, the reflected light being reflected from the metal wiring layer through the base substrate and the reflection controlling layer.

A method of manufacturing a display substrate, the method comprising:

• forming a reflection controlling layer on a substrate;
• forming a metal layer on the reflection controlling layer;
• forming a metal wiring by patterning the metal layer;
• and
• forming an insulation layer on the metal wiring,
• wherein the reflection controlling layer comprises one of silicon nitride, silicon oxide, aluminum oxide, and titanium dioxide, and
• if the reflection controlling layer comprises the silicon nitride, a thickness of the reflection controlling layer 220 is about 500 (angstroms) A to 900 Å,
• if the reflection controlling layer comprises the silicon oxide, the thickness of the reflection controlling layer is about 700 Å to 1300 Å,
• if the reflection controlling layer comprises the aluminum oxide, the thickness of the reflection controlling layer is about 600 Å to 1200 Å, and
• if the reflection controlling layer 220 comprises the titanium dioxide, the thickness of the is reflection controlling layer is about 400 Å to 800 Å.