DISPLAY APPARATUS AND LUMINANCE CONTROL METHOD
First Claim
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1. A display apparatus using a cold cathode fluorescent lamp as a light source, the apparatus comprising:
- a gradient detector which detects a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and
a controller which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detector.
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Abstract
A display apparatus according to the present invention using a cold cathode fluorescent lamp as a light source includes: a gradient detector which detects a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and a controller which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detector.
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Citations
15 Claims
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1. A display apparatus using a cold cathode fluorescent lamp as a light source, the apparatus comprising:
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a gradient detector which detects a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and a controller which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detector. - View Dependent Claims (7)
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2. A display apparatus using a cold cathode fluorescent lamp as a light source, the apparatus comprising:
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a temperature detector which detects an internal temperature of a housing of the display apparatus; a time measurement unit which measures elapsed time from initiation of lighting of the cold cathode fluorescent lamp; a gradient detector which detects a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and a controller which projects a saturation temperature of the cold cathode fluorescent lamp based on the elapsed time and an internal temperature difference of the housing between a time of the initiation of lighting of the cold cathode fluorescent lamp and a present time, and which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited in accordance with the saturation temperature, when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detector. - View Dependent Claims (3, 12, 13)
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4. A display apparatus using a cold cathode fluorescent lamp as a light source, the apparatus comprising:
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a gradient detector which detects conditions in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; a temperature detector which detects a temperature of the cold cathode fluorescent lamp; and a controller which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited according to the temperature detected by the temperature detector, when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detector. - View Dependent Claims (14)
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5. A display apparatus using a cold cathode fluorescent lamp as a light source, the apparatus comprising:
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a first temperature detector which detects a temperature at one end of the cold cathode fluorescent lamp; a second temperature detector which detects a temperature at an other end of the cold cathode fluorescent lamp; and a controller which conducts control so that emitted luminance of the cold cathode fluorescent lamp is inhibited according to a temperature difference between the temperature detected by the first temperature detector and the temperature detected by the second temperature detector. - View Dependent Claims (6, 15)
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8. A luminance control method for a display apparatus using a cold cathode fluorescent lamp as a light source, the method comprising:
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a gradient detection step of detecting a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and a control step of conducting control so that emitted luminance of the cold cathode fluorescent lamp is inhibited when the condition in which one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detection step.
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9. A luminance control method for a display apparatus using a cold cathode fluorescent lamp as a light source, the method comprising:
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a temperature detection step of detecting an internal temperature of a housing of the display apparatus; a time measurement step of measuring elapsed time from initiation of lighting of the cold cathode fluorescent lamp; a gradient detection step of detecting a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; and a control step of projecting a saturation temperature of the cold cathode fluorescent lamp based on the elapsed time and an internal temperature difference of the housing between a time of the initiation of lightning of the cold cathode fluorescent lamp and a present time, and conducting control so that emitted luminance of the cold cathode fluorescent lamp is inhibited in accordance with the saturation temperature, when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detection step.
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10. A luminance control method for a display apparatus using a cold cathode fluorescent lamp as a light source, the method comprising:
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a gradient detection step for detecting a condition in which one end of the cold cathode fluorescent lamp is disposed higher than an other end thereof; a temperature detection step of detecting a temperature of the cold cathode fluorescent lamp; and a control step of conducting control so that emitted luminance of the cold cathode fluorescent lamp is inhibited according to the temperature detected by the temperature detection step when the condition in which the one end of the cold cathode fluorescent lamp is disposed higher than the other end thereof is detected by the gradient detection step.
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11. A luminance control method for a display apparatus using a cold cathode fluorescent lamp as a light source, the method comprising:
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a first temperature detection step of detecting a temperature at one end of the cold cathode fluorescent lamp; a second temperature detection step of detecting a temperature at an other end of the cold cathode fluorescent lamp; and a control step of conducting control so that emitted luminance of the cold cathode fluorescent lamp is inhibited according to a temperature difference between the temperature detected by the first temperature detection step and the temperature detected by the second temperature detection step.
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Specification