Patent ID: 9552776
Date: 2017-01-24
CPC Classifications: G09G

Claim:
1. A luminance compensation apparatus of an organic light emitting diode panel, comprising: a reference pixel element that is installed at an outer peripheral portion of a display area on an organic light emitting diode panel and operates corresponding to a pixel element aligned in the display area; and a driving chip that is provided in an area including the reference pixel element of the outer peripheral portion of the display area, compares a luminance value of light incident from the reference pixel element with a reference luminance value to calculate a luminance deviation value based on a comparison result, controls driving of pixel elements aligned in the display area according to the luminance deviation value, and allows light, luminance deviation of which has been compensated, to be irradiated, wherein the driving chip comprises: an optical sensor that is installed at a position facing the reference pixel element, detects light incident from the reference pixel element, and outputs a luminance detection signal based on the detected light; an optical path layer between the reference pixel element and the optical sensor such that the optical sensor is over the optical path layer and the optical path layer is over the reference pixel element; a connection layer that surrounds the optical path layer in a first direction parallel to a bottom surface of an outer peripheral portion of the driving chip; a light blocking layer having a first portion that surrounds the reference pixel element and the optical path layer in the first direction, and having a second portion that surrounds the reference pixel element and the optical path layer in a second direction perpendicular to the bottom surface of an outer peripheral portion of the driving chip except for the bottom surface of an outer peripheral portion of the driving chip; a comparator that compares a luminance detection value input from the optical sensor with the reference luminance value and outputs a luminance deviation value based on a comparison result; and a luminance controller that outputs a luminance deviation compensation control signal for controlling driving of the pixel elements according to the luminance deviation value output from the comparator.