Abstract: A method of inspecting a display substrate including pixel patterns provided in pixel areas disposed in a display area in a first direction and a second direction may include obtaining a captured image of the pixel patterns of the display substrate, grouping pixels included in the captured image by grouping at least two pixels disposed in the first direction into a pixel group, designating each pixel group included in the captured image as a target pixel group, comparing pixel patterns of the target pixel group with pixel patterns of an adjacent pixel group positioned in a third direction with respect to the target pixel group, and determining whether the pixel patterns of the target pixel group are defective.

Abstract: If a request to execute an executable file of a guest operating system or an executable file being executed in the guest operating system is detected, the present disclosure calculates a hash value before the executable file is executed and compares the calculated hash value with a pre-stored hash value, thereby securing security of the executable file; parses a file system of the guest operating system prior to starting the guest operating system and verifies integrity of a virtualization driver, and if the virtualization driver has integrity according to a result of the verification, blocks modulation of a memory area where the virtualization driver is allocated, a memory area corresponding to a master boot record (MBR) of the guest operating system, and a memory area corresponding to a volume boot record (VBR) of the guest operating system, and if an access to a file occurs in the virtualization driver, determines authority to access the file to which the access was requested, and processes the access acco