US 9,810,899 B1
Illumination of an electrowetting display
Anthony John Slack, Var (FR)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Dec. 23, 2014, as Appl. No. 14/581,699.
Int. Cl. G09G 3/14 (2006.01); G09G 3/20 (2006.01); G09G 3/34 (2006.01); G02B 26/00 (2006.01); F21V 8/00 (2006.01); G02F 1/167 (2006.01); G02F 1/1335 (2006.01); G09G 3/3233 (2016.01)
CPC G02B 26/005 (2013.01) [G02B 6/0068 (2013.01); G02B 6/0073 (2013.01); G02B 6/0026 (2013.01); G02F 1/1336 (2013.01); G02F 1/133514 (2013.01); G02F 1/133602 (2013.01); G02F 1/133606 (2013.01); G02F 1/167 (2013.01); G02F 2001/133622 (2013.01); G02F 2203/34 (2013.01); G09G 3/2003 (2013.01); G09G 3/3233 (2013.01); G09G 3/348 (2013.01); G09G 3/3433 (2013.01); G09G 2300/04 (2013.01); G09G 2300/0452 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electrowetting display comprising:
a first substrate and a second substrate opposite to the first substrate;
a plurality of pixel walls that intersect to separate a plurality of pixel regions, wherein each pixel region comprises:
a hydrophobic surface on the first substrate;
an oil on the hydrophobic surface between the first substrate and the second substrate, wherein the oil comprises a mixture of dyes, and wherein the mixture comprises a red dye, a green dye and a blue dye;
a fluid that includes an electrolyte, wherein the fluid is on the oil; and
a pixel electrode, wherein when a voltage is applied to the pixel region via the pixel electrode in conjunction with a common electrode, a portion of the oil is displaced by the fluid on the hydrophobic surface; and
an illumination layer between the first substrate and the second substrate, wherein the illumination layer comprises a red light emitting diode (LED), a green LED and a blue LED, and wherein the red LED produces red light at a wavelength of light absorption that corresponds to a wavelength of the red dye, the green LED produces green light at a wavelength of light absorption that corresponds to a wavelength of the green dye, and the blue LED produces blue light at a wavelength of light absorption that corresponds to a wavelength of the blue dye.