Backlight and Display Device

A display device comprising:

• a light source device in which a plurality of light-emitting elements are arranged;
• a pair of light-transmitting substrates which are provided over the light source device;
• a reflective layer including an opening portion, which is formed between the pair of light-transmitting substrates;
• a movable microstructure including a shutter provided to correspond to the opening portion;
• and
• a transistor which is connected to the movable microstructure,
• wherein the light source device comprises:
• a first organic resin having a projected spherical surface and a light-transmitting property covering each of the plurality of light-emitting elements;
• and
• a second organic resin having a planarized surface and a light-transmitting property covering the plurality of light-emitting elements and the first organic resin.

A display device comprising:

• a backlight module comprising a plurality of light-emitting elements;
• and
• a plurality of pixels, each comprising a switching element and a MEMS switch for controlling transmittance of light from the backlight module, the MEMS switch comprising a shutter,
• wherein the switching element comprises a transistor, the transistor comprising a semiconductor film which comprises a channel formation region, the semiconductor film comprising an oxide semiconductor material.