Mask, thin film transistor substrate, method of manufacturing the thin film transistor substrate using the mask, and display apparatus using the thin film transistor substrate

A thin film transistor substrate comprising:

• a base substrate;
• a voltage applying unit positioned on the base substrate;
• an organic layer comprising a plurality of micro lens parts formed on the organic layer to expose an output terminal of the voltage applying unit, each of the micro lens parts having an irregular shape;
• and
• a pixel electrode comprising a first electrode formed on the organic layer and a second electrode formed on an upper face of the first electrode, wherein the second electrode includes a light transmitting window.

A method of manufacturing a thin film transistor substrate comprising:

• forming a voltage applying unit comprising an output terminal on a base substrate;
• forming an organic layer on the base substrate to cover the voltage applying unit;
• positioning a mask above a surface of the organic layer, the mask comprising a plurality of light blocking patterns having a plurality of sides, wherein each light blocking pattern is a substantially polygonal shape and further wherein the light blocking patterns have different lengths from each other;
• exposing the organic layer with light through the mask to form micro lens structures on an upper surface of the organic layer, each of the micro lens structures having a different shape when viewed on a plane;
• forming a first electrode on the upper face of the organic layer;
• and
• forming a second electrode on the first electrode, the second electrode including a light transmitting window to partially expose the first electrode.

A display apparatus comprising:

• a thin film transistor substrate comprising:
• a first substrate;
• a voltage applying unit formed on the first substrate;
• an organic layer having a plurality of micro lens parts formed on the organic layer to expose an output terminal of the voltage applying unit, each of the micro lens parts having an irregular shape of a different size to increase a light reflectance;
• and
• a pixel electrode comprising a first electrode formed on the organic layer and a second electrode formed on an upper face of the first electrode, wherein the second electrode includes a light transmitting window;
• and
• a second substrate comprising a common electrode corresponding to the pixel electrode, the second substrate corresponding to the first substrate;
• and
• a liquid crystal layer disposed between the first and second substrates.