System for correcting display device and method for correcting the same

A method of manufacturing an active matrix type display device, the active matrix type display device being able to correct a video signal, comprising:

• providing an active matrix type display device comprising
• an active matrix type display panel;
• and
• a nonvolatile memory;
• connecting a correction information producing device to the active matrix type display device;
• displaying an image using a video signal on the active matrix type display panel;
• obtaining an analog video signal from the displayed image;
• converting the analog video signal into a digital video signal;
• processing the digital video signal to obtain a correction information;
• and
• writing the correction information into the nonvolatile memory, wherein the processing is conducted by processing the digital video signal using at least one selected from the group consisting of a Laplacian filter and a median filter so as to detect a singular point.

A method of manufacturing an active matrix type display device, the active matrix type display device being able to correct a video signal, comprising:

• providing an active matrix type display device comprising
• an active matrix type display panel;
• and
• a nonvolatile memory;
• connecting a correction information producing device to the active matrix type display device comprising;
• a memory circuit for storing the correction information;
• an adding circuit for adding the correction information;
• displaying an image using a video signal on the active matrix type display panel;
• obtaining an analog video signal from the displayed image;
• converting the analog video signal into a digital video signal;
• processing the digital video signal to obtain a preceding correction information;
• storing the preceding correction information into the memory circuit;
• writing the preceding correction information into the nonvolatile memory;
• displaying an image using a video signal corrected by the preceding correction information;
• obtaining an analog video signal from the displayed image again;
• converting the analog video signal into a digital video signal;
• processing the digital video signal to obtain a correction information;
• adding the correction information to the preceding correction information to obtain a following correction information;
• and
• writing the following correction information into the nonvolatile memory again,
• wherein the steps from the step displaying an image using a video signal corrected by the preceding correction information to the step of writing the following correction information are repeated n times, n being a natural number.

A method for operating an active matrix type display device,

• wherein the active matrix type display device comprising:
• an active matrix type display panel;
• a gate driver;
• a source driver;
• a synchronous divider;
• an A/D converter;
• a nonvolatile memory storing a correction information;
• a correction processor;
• a D/A converter;
• the method comprising:
• inputting an analog video signal to the A/D converter through the synchronous divider,
• converting the analog video signal to a digital video signal by the A/D converter;
• inputting the digital video signal to the correction processor;
• inputting the correction information from the nonvolatile memory;
• correcting the digital video signal in the correction processor by the correction information;
• inputting the corrected digital video signal to the D/A converter;
• converting the corrected digital video signal to a corrected analog video signal by the D/A converter;
• inputting the corrected analog video signal to the source driver;
• and
• displaying an image on the active matrix type display device by the corrected analog video signal inputted to the source driver.