Patent ID: 9657904
Date: 2017-05-23
CPC Classifications: G02B

Claim:
1. A method to reduce yellow gradient in an electronic ink display of an electronic reader device, comprising: placing the electronic reader device on a rack beneath a lamp, the lamp operative to emit light having wavelengths between about 200 nanometers (nm) and 700 nm, the electronic reader including a light guide that is adhered to the electronic ink display; positioning a top of the electronic reader device under a lamp such that a portion of the electronic ink display that exhibits a yellow gradient receives a peak intensity of the light emitted by the lamp, wherein the peak intensity emitted by the lamp is below about 100 milliwatts per square centimeter; positioning a glass plate between the lamp and the electronic reader device, the glass plate configured to block wavelengths of the light under about 310 nm; turning on the lamp; exposing the electronic ink display to the light until a radiant exposure of about twenty joules per square centimeter is output by the lamp that is directed to the electronic ink display, wherein the electronic ink display is exposed to light wavelengths between 310 nm and 700 nm; and removing the electronic reader from the rack.