Method and equipment for monitor calibration and storage medium storing a program for executing the method

• US 6,714,211 B2
• Filed: 09/09/1997
• Issued: 03/30/2004
• Est. Priority Date: 09/11/1996
• Status: Expired due to Term

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: Kobayakawa, Koji, Ohara, Kiyotaka, Ueda, Masashi, Hibino, Masaaki, Yoshida, Yasunari, Hori, Masaaki
• Primary Examiner(s): Chow, Dennis-Doon
• Application Number:
  US08/926,029
• Publication Number:
  US 20020057282A1
• Time in Patent Office: 2,394 Days
• Field of Search: 348/180, 348/181, 348/182, 348/189, 348/190, 348/191, 348/379, 345/147, 345/690, 345/698, 345/214
• US Class Current: 345/690
• CPC Class Codes: G09G 1/165 Details of a display terminal using a CRT, the details relating to the control arrangement of the display terminal and to the interfaces thereto details suitable for both CRT and flat panel G09G5/003; specific for a flat panel G09G3/2092
• CPC Class Codes: G09G 2320/0693 Calibration of display systems

Abstract

A monitor calibration method for determining the black point of a monitor display, wherein a solid black display area and a gray display area are displayed on a monitor screen in the form of stripes, for example, so that each display area is sandwiched by the other type of display area. Then, while the brightness of the gray display area is gradually changed, the user signals OK using a mouse device at the point in time that the viewer determines a difference between the two display areas. The input value of the gray display area at that time is fixed and saved as the black point. By arranging the display areas in alternating stripes, even a subtle difference in the two display areas is visually striking. Hence, a very accurate black point can be determined.

Claims

1. A method of detecting a black point of a monitor capable of being executed on a computer for calibration of a gradation component input to a monitor driver, comprising the steps of:

displaying a solid black display area and a gray display area adjacent to one another; and

gradually changing brightness of the gray display area from light to dark or from dark to light,

wherein at least one portion of the solid black display area is interposed in the gray display area and at least one portion of the gray display area is interposed in the solid black display area to detect a black point of a monitor and the brightness of the solid black display area and the gray display area are periodically exchanged while simultaneously and gradually changing the brightness of the gray display area from light to dark or from dark to light.

2. The method as claimed in claim 1, wherein the solid black display area and the gray display area are strip-shaped and arranged alternately.

3. The method as claimed in claim 2, wherein the alternately arranged stripes of the solid black display area and the gray display area have a width of between {fraction (1/72)} and ¼

inch.

4. The method as claimed in claim 2, wherein the alternately arranged stripes of the solid black display area and the gray display area have a width of between {fraction (1/36)} and ⅛

inch.

5. A storage medium for storing an application program for carrying out the method as claimed in claim 1 and capable of being executed on a computer.

6. A method of detecting the black point of a monitor comprising the steps of:

calibrating on a computer a gradation component input to a monitor driver by displaying a solid black display area and a gray display area adjacent to one another; and

gradually changing brightness of the gray display area from light to dark or from dark to light,

wherein a selected one of the solid black display area and the gray display area is surrounded by a non-selected one of the solid black display area and the gray display area to detect a black point of a monitor and the brightness of the solid black display area and the gray display area are periodically exchanged, while the brightness of the gray display area is gradually changed from light to dark or from dark to light.

7. The method as claimed in claim 6, wherein the solid black display area and the gray display area form a specific shape.

8. The method as claimed in claim 7, wherein the solid black display area and gray display area that form a specific shape each contain portions having a width of between {fraction (1/72)} and ¼

inch.

9. The method as claimed in claim 7, wherein the solid black display area and gray display area that form a specific shape each contain portions having a width of between {fraction (1/36)} and ⅛

inch.

10. A monitor calibration equipment for detecting a black point of a monitor display capable of being executed on a computer for calibration of a gradation component input to a monitor driver, comprising:

display area setting means for setting at least one portion of both a solid back display area and a gray display area on the monitor display so as to be interposed in the other display area;

solid black display area control means for outputting display output of a minimum brightness to be displayed in the solid black display area set by the display area setting means; and

gray display area control means for outputting display output which brightness is gradually varied from light to dark or from dark to light to be displayed in the gray display area set by the display area setting means to detect a black point of a monitor, wherein the solid black display area control means periodically displays in the solid black display area output equivalent to the display output for the gray display area control means while at the same time the gray display area control means displays in the gray display area display output having the minimum brightness, in order that the brightness of the solid black display area and of the gray display area are periodically exchanged, while the brightness of the gray display area is gradually changed from light to dark or from dark to light.

11. The monitor calibration equipment as claimed in claim 10, wherein the solid black display area and the gray display area set by the display area setting means are stripe-shaped and arranged alternately.

12. The monitor calibration equipment as claimed in claim 11, wherein the alternately arranged stripes of the solid black display area and the gray display area have a width of between {fraction (1/72)} and ¼

inch.

13. The monitor calibration equipment as claimed in claim 11, wherein the alternately arranged stripes of the solid black display area and the gray display area have a width of between {fraction (1/36)} and ⅛

inch.