Display device, display system, and correction method

• US 8,872,864 B2
• Filed: 04/12/2010
• Issued: 10/28/2014
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: Eizo Corporation
• Original Assignee: Eizo Nanao Corporation (Eizo Corporation)
• Inventors: Deyama, Atsuyoshi, Yonemitsu, Junro, Nagashima, Kensuke, Kawakami, Takafumi
• Primary Examiner(s): SPAR, ILANA L
• Application Number:
  US13/264,616
• Publication Number:
  US 20120038688A1
• Time in Patent Office: 1,660 Days
• Field of Search: 345/690, 345/208, 345 87-104
• US Class Current: 345/690
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: H04N 1/6033 using test pattern analysis H04N1/6055 takes precedence

Abstract

A control unit performs calibration when a determining unit determines that an absence condition of an operator is satisfied. Calibration is performed to a whole or part of brightness, a white point (gain), gamma (gradation), and primary colors (red, blue, and green colors). The control unit stores a correction amount by calibration in a storage unit, measures the (corrected) calibrated brightness or color tone by using an optical sensor, and stores the measured final measurement result in the storage unit as a corrected measurement value. After performing calibration or when the determining unit determines that a presence condition of the operator is satisfied, a profile generating unit generates color space information.

Claims

1. A display device connected with a color space information generating device which is separated from and independent of the display device, the display device comprising:

a display unit; and

a correcting unit that corrects brightness or a color tone of the display unit, the display device further comprising;

a measuring unit that measures the brightness or the color tone of the display unit;

a difference calculating unit that calculates a difference between a measurement value measured by the measuring unit and a predetermined target value;

a correction-amount calculating unit that calculates a correction amount to correct the brightness or the color tone of the display unit based on the difference calculated by the difference calculating unit;

a first determining unit that determines establishment of a condition that an operator is absent; and

a second determining unit that determines establishment of a condition that the operator is present, wherein

the correcting unit corrects the brightness or the color tone by using the correction amount calculated by the correction-amount calculating unit when the first determining unit determines that the condition that the operator is absent is established, and

the display device further comprises

a storage unit that stores a corrected measurement value of the brightness or the color tone measured by the measuring unit after the correcting unit corrects the brightness or the color tone; and

an output unit that outputs, according to reading from the color space information generating device, the corrected measurement value stored in the storage unit to the color space information generating device that generates color space information concerning color management for achieving reproducibility of colors based on the corrected measurement value, when the second determining unit determines that the condition that the operator is present is established.

2. The display device according to claim 1, comprising a target value calculating unit that calculates the target value from arbitrary color space information concerning the color management for achieving the reproducibility of colors.

3. The display device according to claim 1, further comprising a human sensor, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when the human sensor does not sense a person, and

the second determining unit is configured to determine that the condition that the operator is present is established when the human sensor senses a person.

4. The display device according to claim 2, further comprising a human sensor, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when the human sensor does not sense a person, and

the second determining unit is configured to determine that the condition that the operator is present is established when the human sensor senses a person.

5. The display device according to claim 1, further comprising an obtaining unit that obtains a predetermined signal from the external device, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when the obtaining unit does not obtain a predetermined signal, and

the second determining unit is configured to determine that the condition that the operator is present is established when the obtaining unit obtains a predetermined signal.

6. The display device according to claim 2, further comprising an obtaining unit that obtains a predetermined signal from the external device, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when the obtaining unit does not obtain a predetermined signal, and

the second determining unit is configured to determine that the condition that the operator is present is established when the obtaining unit obtains a predetermined signal.

7. The display device according to claim 1, further comprising a timing unit, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when time is a predetermined first time point, and

the second determining unit is configured to determine that the condition that the operator is present is established when time is a predetermined second time point.

8. The display device according to claim 2, further comprising a timing unit, wherein

the first determining unit is configured to determine that the condition that the operator is absent is established when time is a predetermined first time point, and

the second determining unit is configured to determine that the condition that the operator is present is established when time is a predetermined second time point.

9. A display system comprising:

the display device according to claim 1; and

an external device that outputs predetermined data to the display device, wherein

the external device includes a generating unit that generates color space information concerning color management for achieving reproducibility of colors based on the corrected measurement value that is read, when the second determining unit of the display device determines that the condition that the operator is present is established.

10. A correction method for correcting brightness or a color tone of a display unit of a display device that includes the display unit connected with a color space information generating device which is separated from and independent of the display device, the method comprising:

determining establishment of a condition that an operator is absent by a first determining unit;

measuring the brightness or the color tone of the display unit by a measuring unit when determined that the condition that the operator is absent is established;

calculating a difference between a measured measurement value and a predetermined target value by a difference calculating unit;

calculating a correction amount to correct the brightness or the color tone of the display unit based on the calculated difference by a correction-amount calculating unit;

correcting the brightness or the color tone by using the calculated correction amount by a correcting unit;

storing, in a storing unit, a corrected measurement value of the brightness or the color tone measured by the measuring unit after correcting the brightness or the color tone by the correcting unit;

determining establishment of a condition that the operator is present by a second determining unit; and

according to reading from the color space information generating device, outputting the corrected measurement value stored in the storage unit to the color space information generating device that generates color space information concerning color management for achieving reproducibility of colors based on the corrected measurement value, when determined that the condition that the operator is present is established.