Method and apparatus for controlling liquid crystal display brightness and liquid crystal display device
First Claim
1. A method for controlling liquid crystal display brightness, comprising:
- determining a backlight adjustment rule according to a grayscale value distribution of an image signal and a first preset rule;
determining a zoned image data block according to the image signal and a preset division rule, and determining a zoned backlight value corresponding to the zoned image data block according to a grayscale value of the zoned image data block;
adjusting the zoned backlight value according to the backlight adjustment rule to obtain an adjusted zoned backlight value; and
mapping the adjusted zoned backlight value to a drive circuit of a backlight source of a corresponding backlight zone, so as to drive and control backlight source brightness of the corresponding backlight zone;
wherein the grayscale value distribution of the image signal represents a grayscale value distribution of pixels of the image signal, the first preset rule comprises a corresponding relationship between the grayscale value distribution and the backlight adjustment rule, and the backlight adjustment rule is a corresponding relationship between a backlight value and an adjustment coefficient for the backlight value.
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Abstract
Embodiments of the present application provide a method and apparatus for controlling liquid crystal display brightness, and a liquid crystal display device. The method for controlling liquid crystal display brightness according to the present application determines a backlight adjustment rule according to a grayscale value distribution of an image signal and a first preset rule, adjusts a zoned backlight value corresponding to a zoned image data block according to the backlight adjustment rule, as well as drives and controls the backlight source brightness of the corresponding backlight zone by using the adjusted zoned backlight value, thereby adjusting the zoned backlight values for image signals of different grayscale value distributions by using different backlight adjustment rules, significantly improving the picture hierarchy of different image signals, and enhancing the displaying quality of the picture.
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Citations
14 Claims
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1. A method for controlling liquid crystal display brightness, comprising:
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determining a backlight adjustment rule according to a grayscale value distribution of an image signal and a first preset rule; determining a zoned image data block according to the image signal and a preset division rule, and determining a zoned backlight value corresponding to the zoned image data block according to a grayscale value of the zoned image data block; adjusting the zoned backlight value according to the backlight adjustment rule to obtain an adjusted zoned backlight value; and mapping the adjusted zoned backlight value to a drive circuit of a backlight source of a corresponding backlight zone, so as to drive and control backlight source brightness of the corresponding backlight zone; wherein the grayscale value distribution of the image signal represents a grayscale value distribution of pixels of the image signal, the first preset rule comprises a corresponding relationship between the grayscale value distribution and the backlight adjustment rule, and the backlight adjustment rule is a corresponding relationship between a backlight value and an adjustment coefficient for the backlight value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for controlling liquid crystal display brightness, comprising:
- a memory for storing instructions; and
a processor coupled to the memory, the processor is configured to execute the instructions stored in the memory, and the processor is configured to;determine a backlight adjustment rule according to a grayscale value distribution of an image signal and a first preset rule; determine a zoned image data block according to the image signal and a preset division rule, and determine a zoned backlight value corresponding to the zoned image data block according to a grayscale value of the zoned image data block; adjust the zoned backlight value according to the backlight adjustment rule to obtain an adjusted zoned backlight value; and map the adjusted zoned backlight value to a drive circuit of a backlight source of a corresponding backlight zone, so as to drive and control backlight source brightness of the corresponding backlight zone; wherein the grayscale value distribution of the image signal represents a grayscale value distribution of pixels of the image signal, the first preset rule comprises a corresponding relationship between the grayscale value distribution and the backlight adjustment rule, and the backlight adjustment rule is a corresponding relationship between a backlight value and an adjustment coefficient for the backlight value. - View Dependent Claims (8, 9, 10, 11, 12)
- a memory for storing instructions; and
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13. A liquid crystal display device, comprising:
- a memory, a processor, a backlight processor, and a pulse width modulation (PWM) driver, wherein the memory, the processor, the backlight processor, and the PWM driver are connected via a bus; and
wherein;the memory is configured to store instructions; the processor is configured to execute the instructions stored in the memory, and the processor is also configured to receive an image signal for data processing, output processed image data to a timing controller which generates a driving signal for controlling image displaying of a liquid crystal panel according to the processed image data, and output a zoned backlight value to a backlight processor according to the processed image signal; the processor is further configured to; determine a backlight adjustment rule according to a grayscale value distribution of the image signal and a first preset rule;
determine a zoned image data block according to the image signal and a preset division rule, and determine a zoned backlight value corresponding to the zoned image data block according to a grayscale value of the zoned image data block;
adjust the zoned backlight value according to the backlight adjustment rule, to obtain an adjusted zoned backlight value; and
map the adjusted zoned backlight value to a drive circuit of a backlight source of a corresponding backlight zone, so as to drive and control backlight source brightness of the corresponding backlight zone;
wherein the grayscale value distribution of the image signal represents a grayscale value distribution of pixels of the image signal, the first preset rule comprises a corresponding relationship between the grayscale value distribution and the backlight adjustment rule, and the backlight adjustment rule is a corresponding relationship between a backlight value and an adjustment coefficient for the backlight value;the backlight processor is configured to determine, according to each zoned backlight value, a duty cycle and current data of a corresponding PWM signal, and output the duty cycle and the current data of the corresponding PWM signal to the PWM driver; and the PWM driver is configured to generate a PWM control signal to control a backlight source of a corresponding backlight zone. - View Dependent Claims (14)
- a memory, a processor, a backlight processor, and a pulse width modulation (PWM) driver, wherein the memory, the processor, the backlight processor, and the PWM driver are connected via a bus; and
Specification