Display device

Abstract

A display device is provided and includes at least two sub-pixels. One of the sub-pixels is a blue sub-pixel. Each of the sub-pixels includes a light emitting unit and a light converting layer disposed on the light emitting unit. A thickness of the light converting layer of another one of the sub-pixels is greater than a thickness of the light converting layer of the one of the sub-pixels. The one of the sub-pixels emits an output light under an operation of the highest gray level, the output light is a final visual light of the blue sub-pixel of the display device, and the output light has an output spectrum. A wavelength of a first wave of the output spectrum ranges from 380 nm to 493 nm, and a full width at half maximum of the first wave ranges from 10 nm to 30 nm.

What is claimed is: 
     
         1 . A display device, comprising:
 at least two sub-pixels, one of the at least two sub-pixels being a blue sub-pixel, and each of the at least two sub-pixels comprising:
 a light emitting unit; and 
 a light converting layer disposed on the light emitting unit, wherein a thickness of the light converting layer of another one of the at least two sub-pixels is greater than a thickness of the light converting layer of the one of the at least two sub-pixels, 
   wherein the one of the at least two sub-pixels emits an output light under an operation of the highest gray level, the output light is a final visual light of the blue sub-pixel of the display device, the output light having an output spectrum, a wavelength of a first wave of the output spectrum ranges from 380 nm to 493 nm, and a full width at half maximum of the first wave ranges from 10 nm to 30 nm.   
     
     
         2 . The display device of  claim 1 , wherein the light emitting unit of the one of the at least two sub-pixels is the same as the light emitting unit of the another one of the at least two sub-pixels. 
     
     
         3 . The display device of  claim 1 , wherein the output spectrum further comprises a second wave and a wavelength of the second wave ranges from 494 nm to 580 nm. 
     
     
         4 . The display device of  claim 3 , wherein the first wave comprises a first intensity peak, the second wave comprises a second intensity peak, and a ratio of an intensity of the first intensity peak over an intensity of the second intensity peak ranges from 5 to 35. 
     
     
         5 . The display device of  claim 4 , wherein the intensity of the first intensity peak defines as a local maximum intensity of the first wave and the intensity of the second intensity peak defines as a local maximum intensity of the second wave. 
     
     
         6 . The display device of  claim 4 , wherein a ratio of the intensity of the first intensity peak over the intensity of the second intensity peak ranges from 21 to 32. 
     
     
         7 . The display device of  claim 1 , wherein a light generated from the light converting layer of the one of the at least two sub-pixels and another light generated from the light converting layer of the another one of the at least two sub-pixels have different peak wavelengths. 
     
     
         8 . The display device of  claim 1 , wherein the light converting layer of the one of the at least two sub-pixels comprises at least one of quantum dot material, color filter material and phosphor material. 
     
     
         9 . The display device of  claim 1 , wherein the light converting layer of the one of the at least two sub-pixels comprises quantum dots with different sizes. 
     
     
         10 . The display device of  claim 1 , wherein the light converting layer of the one of the at least two sub-pixels and the light converting layer of the another one of the at least two sub-pixels comprise quantum dots with different sizes.