Brightness measurement method and brightness adjustment device for display elements

摘要

In a state in which a reference light source emits light, display elements of a display device are caused to light up in each of lighting patterns for causing any adjacent display elements not to light up simultaneously. A captured image acquirer acquires image data about an image captured in each of the lighting patterns, a display element position calculator determines the position of each of the display elements and the position of the reference light source on each of the images, a display element brightness calculator calculates brightnesses from the pixel values at the determined positions, a relative brightness calculator calculates a relative brightness of each of the display elements with respect to the brightness of the reference light source, and a display element output coefficient calculator calculates coefficients for making the brightnesses of the display elements uniform.

主权项

1. A brightness measurement method for display elements, of measuring a brightness of each of display elements which construct a screen of a display device, said method comprising:
a display element position calculating step that uses, as an input, a plurality of captured image data about images which are captured by causing the display elements to light up in each of lighting patterns which are shifted in time in such a way that any adjacent ones of said display elements do not light up simultaneously in a state in which a predetermined reference light source emits light, the number of captured image data being equal to the number of lighting patterns, to determine a position of each of said display elements and a position of said reference light source on each of said captured images; a display element brightness calculating step that calculates the brightness of each of said display elements and a brightness of said reference light source from pixel values at the positions on said captured image which are determined in said display element position calculating step; and a relative brightness calculating step that calculates a relative brightness of each of said display elements with respect to the brightness of said reference light source calculated in said display element brightness calculating step for each of said captured images, wherein the captured image data used as the input are data about the plurality of captured image data about images which are captured by defining display elements in an arbitrary region of the screen of the display device as the reference light source and causing display elements in a region other than said arbitrary region to light up in each of the lighting patterns which are shifted in time in such a way that any adjacent display elements do not light up simultaneously in the state in which said reference light source emits light while changing the region defined as said reference light source, and said brightness measurement method includes a relative brightness combining step of combining the relative brightness of each of said display elements which is calculated from each of the plurality of captured image data in the relative brightness calculating step to interpolate a relative brightness of each of the display elements in the region defined as said reference light source.