METHOD AND DEVICE FOR ADJUSTING GRAYSCALE BRIGHTNESS AND 3D DISPLAY DEVICE
First Claim
1. A method for adjusting grayscale brightness, applicable to a 3D display device, the method comprising:
- determining an initial gray level corresponding to a preceding frame, and a target gray level corresponding to a current frame, for any backlight zone corresponding to a zone of a 3D display image;
determining whether the target gray level is comprised in a preset set of gray levels, wherein the preset set of gray levels comprises gray levels no more than a minimum threshold and gray levels no less than an maximum threshold; and
the minimum threshold is a lowest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving, and the maximum threshold is a highest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving; and
if not, then adjusting the grayscale brightness of the backlight zone through over-voltage driving,otherwise, determining the value of an adjustment parameter corresponding to the initial gray level and the target gray level according to a preset backlight brightness adjustment table, and adjusting backlight brightness of the current frame according to the determined value of the adjustment parameter so that grayscale brightness of the current frame equals grayscale brightness corresponding to the target gray level,wherein the adjustment parameter is a duty cycle of backlight or a reference current of backlight.
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Abstract
The disclosure discloses a method and device for adjusting grayscale brightness and a 3D display device. In the present disclosure, an initial gray level and a target gray level are determined, and it is determined whether the target gray level is too low or too high, so that it is determined whether over-voltage driving can be applicable, and in the case that it is not appropriate to adjust grayscale brightness through over-voltage driving, a backlight brightness adjustment table is searched, and backlight brightness is adjusted up or down using a found adjustment parameter to thereby adjust the grayscale brightness so as to reduce crosstalk in liquid crystal display.
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Citations
13 Claims
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1. A method for adjusting grayscale brightness, applicable to a 3D display device, the method comprising:
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determining an initial gray level corresponding to a preceding frame, and a target gray level corresponding to a current frame, for any backlight zone corresponding to a zone of a 3D display image; determining whether the target gray level is comprised in a preset set of gray levels, wherein the preset set of gray levels comprises gray levels no more than a minimum threshold and gray levels no less than an maximum threshold; and
the minimum threshold is a lowest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving, and the maximum threshold is a highest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving; andif not, then adjusting the grayscale brightness of the backlight zone through over-voltage driving, otherwise, determining the value of an adjustment parameter corresponding to the initial gray level and the target gray level according to a preset backlight brightness adjustment table, and adjusting backlight brightness of the current frame according to the determined value of the adjustment parameter so that grayscale brightness of the current frame equals grayscale brightness corresponding to the target gray level, wherein the adjustment parameter is a duty cycle of backlight or a reference current of backlight. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for adjusting grayscale brightness, applicable to a 3D display device, the device comprising:
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one or more processors; and a memory, wherein one or more computer readable program codes are stored in the memory, and the one or more processors are configured to execute the one or more computer readable program codes to perform; determining an initial gray level corresponding to a preceding frame, and a target gray level corresponding to a current frame, for any backlight zone corresponding to a zone of a 3D display image; determining whether the target gray level is comprised in a preset set of gray levels, wherein the preset set of gray levels comprises gray levels no more than a minimum threshold and gray levels no less than an maximum threshold; and
the minimum threshold is a lowest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving, and the maximum threshold is a highest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving; andif not, then adjusting the grayscale brightness of the backlight zone through over-voltage driving, otherwise, determining the value of an adjustment parameter corresponding to the initial gray level and the target gray level according to a preset backlight brightness adjustment table, and adjusting backlight brightness of the current frame according to the determined value of the adjustment parameter so that grayscale brightness of the current frame equals grayscale brightness corresponding to the target gray level, wherein the adjustment parameter is a duty cycle of backlight or a reference current of backlight. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A 3D display device, comprising a device for adjusting grayscale brightness, wherein the device for adjusting grayscale brightness comprising:
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one or more processors; and a memory, wherein one or more computer readable program codes are stored in the memory, and the one or more processors are configured to execute the one or more computer readable program codes to perform; determining an initial gray level corresponding to a preceding frame, and a target gray level corresponding to a current frame, for any backlight zone corresponding to a zone of a 3D display image; determining whether the target gray level is comprised in a preset set of gray levels, wherein the preset set of gray levels comprises gray levels no more than a minimum threshold and gray levels no less than an maximum threshold; and
the minimum threshold is a lowest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving, and the maximum threshold is a highest gray level at which grayscale brightness of the backlight zone is adjusted through over-voltage driving; andif not, then adjusting the grayscale brightness of the backlight zone through over-voltage driving, otherwise, determining the value of an adjustment parameter corresponding to the initial gray level and the target gray level according to a preset backlight brightness adjustment table, and adjusting backlight brightness of the current frame according to the determined value of the adjustment parameter so that grayscale brightness of the current frame equals grayscale brightness corresponding to the target gray level, wherein the adjustment parameter is a duty cycle of backlight or a reference current of backlight.
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Specification