Light emitting device and display

A light source system comprising:

• a light source to emit light;
• an optical guide member;
• and
• a coating containing a color converting material,
• wherein said light source comprises a nitride compound semiconductor represented by the formula:
• IniGajAikN
• where
• 0≦i
• 0≦j,
• 0≦k and
• i+j+k=1
• including InGaN and Gan,
• doped with various impurities,
• emitting blue light,
• with a main emission peak set within the range from 400 nm to 530 nm,
• wherein said coating filters by absorption a first part of the blue light coming from said light source,
• transmits a second part of the blue light coming from said light source,
• converts the absorbed blue light to a new light of longer wavelength and
• blends this new light to the transmitted part of the blue light coming from said light source, so as to radiate a light combination;
• wherein said optical guide member is used to receive the light from said light source at a first surface of said optical guide member and to emit light in a planar state at a second surface of said optical guide member;
• and
• wherein said coating is disposed at least in an outer vicinity of said first surface of said optical guide member or in an outer vicinity of said second surface of said optical guide member.