US 12,339,559 B1
Electro-optic displays and methods for discharging remnant voltage using backlight
Teck Ping Sim, Acton, MA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Oct. 27, 2022, as Appl. No. 18/050,164.
Claims priority of provisional application 63/287,614, filed on Dec. 9, 2021.
Int. Cl. G02B 26/00 (2006.01); G02F 1/167 (2019.01); G02F 1/1676 (2019.01); G02F 1/16766 (2019.01)
CPC G02F 1/167 (2013.01) [G02F 1/1676 (2019.01); G02F 1/16766 (2019.01)] 28 Claims
OG exemplary drawing
 
1. An electro-optic display comprising:
a light-transmissive front electrode;
a layer of electro-optic material;
an array of pixel electrodes;
an array of thin film transistors positioned adjacent to a surface of the layer of electro-optic material, each thin film transistor comprising a photo-sensitive semiconductor region, wherein each pixel electrode is coupled to a single thin film transistor;
at least one light source positioned adjacent to the array of thin film transistors, wherein the layer of electro-optic material and the at least one light source are disposed on opposite sides of the array of thin film transistors; and
a display driver coupled to the at least one light source and to a gate line and a source line of each of the thin film transistors, wherein there is only one thin film transistor operatively connected between the display driver and each pixel electrode, the display driver configured to:
apply substantially the same voltage to the light-transmissive front electrode and the source line of each of the thin film transistors; and
activate a driving signal to the at least one light source to emit a light having an intensity sufficient to activate the array of thin film transistors to create a conduction path for draining a remnant voltage.