Display apparatus with symmetric diffusion film

A display apparatus, comprising:

• a touchscreen;
• a symmetric diffusion film (SDF), disposed above the touchscreen, and the SDF comprising at least two different materials, including a first material mixed with a second material, and the first material having a first refractive index while the second material having a second refractive index, wherein the first refractive index is different from the second refractive index;
• a backlight module, disposed beneath the touchscreen for emitting light passing through the touchscreen and the SDF;
• and
• an upper polarizer and a lower polarizer, respectively disposed above and beneath the touchscreen wherein the backlight module is disposed beneath the lower polarizer,
• wherein the SDF is disposed between the upper polarizer and the touchscreen.

A display apparatus, comprising:

• a touchscreen comprising a display module and a touch sensor coupled to the display module, wherein the display module comprises a first substrate, a second substrate and a display medium layer disposed between the first substrate and the second substrate;
• and
• a black matrix layer on one side of the second substrate, wherein the touch sensor comprises a sensing electrode layer with a pattern corresponding to the black matrix layer;
• and
• a symmetric diffusion film (SDF), disposed above the touchscreen, and the SDF comprising at least two different materials, including a first material mixed with a second material, and the first material having a first refractive index while the second material having second refractive index, wherein the first refractive index is different from the second refractive index.