US Patent No. 9,860,942

ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE


Patent No. 9,860,942
Issue Date January 02, 2018
Title Organic Light Emitting Diode Display Device
Inventorship Myoung-Soo Lee, Seoul (KR)
Sun-Hee Lee, Goyang-si (KR)
Assignee LG DISPLAY CO., LTD., Seoul (KR)

Claim of US Patent No. 9,860,942

1. An organic light emitting diode (OLED) display device, comprising:
a substrate having a display region and a non-display region surrounding the display region;
an OLED on the substrate in the display region;
an adhesive layer on the OLED and over the substrate including the display region and the non-display region;
an encapsulation substrate bonded, via the adhesive layer, to the substrate in the display region and the non-display region
such that the encapsulation substrate and the substrate face each other; and

a step-difference compensator interposed between the encapsulation substrate and the substrate to correspond to the non-display
region and configured to compensate for a step difference between the display region and the non-display region,

wherein a distance between an upper surface of the OLED and the encapsulation substrate in the display region is substantially
equal to a distance between the substrate and the step-difference compensator in the non-display region when the step-difference
compensator is formed between the encapsulation substrate and the adhesive layer, and

wherein the distance between the upper surface of the OLED and the encapsulation substrate in the display region is substantially
equal to a distance between the encapsulation substrate and the step-difference compensator when the step-difference compensator
is formed between the substrate and the adhesive layer.