Claims
- 1. A density adjusting method for a printer in which there is provided a liquid crystal panel in which a plurality of pixels are arranged in a matrix and each pixel is adjustable to a predetermined gradation, and wherein an image is displayed on the liquid crystal panel disposed on a path of exposure light such that each pixel of the liquid crystal panel is controlled based on a gradation which is set while using, as a standard, one of a first state in which each pixel allows the light to completely pass therethrough and a second state in which each pixel completely blocks the light, said method comprising the steps of:
- displaying an image with a uniform gradation on the liquid crystal panel;
- obtaining a printed image of the image;
- measuring the density of the obtained printed image so as to select a pixel or a plurality of continuous pixels having the minimum or maximum density;
- calculating a difference in density between each pixel and said selected pixel or said selected plurality of continuous pixels and adjusting the gradation of each pixel based on the difference; and
- shifting the gradations of the pixels until one of the pixels reaches said first or second state while maintaining relative differences in gradation after the adjustment, and registering the shifted gradation of each pixel as a standard of each pixel.
- 2. A density adjusting method according to claim 1, wherein the density of said printed image is measured by a CCD sensor serving as a density measuring apparatus.
- 3. A density adjusting method according to claim 2, wherein specification of pixels of said liquid crystal panel corresponding to different portions of a printed image is performed by making the resolution of said CCD sensor correspond to the resolution of said liquid crystal panel.
- 4. A density adjusting method according to claim 1, wherein said density adjusting method is used when an index image is printed.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-43871 |
Mar 1995 |
JPX |
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7-52284 |
Mar 1995 |
JPX |
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Parent Case Info
This is a Divisional of application Ser. No. 08/602,225 filed Feb. 15, 1996.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
61-122639 |
Jun 1986 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
602225 |
Feb 1996 |
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