Method for dynamically improving energy efficiency of low-partition liquid crystal display television

Abstract

The invention relates to the field of energy processing of liquid crystal televisions, and provides a method for dynamically improving energy efficiency of a low-partition liquid crystal television in order to improve energy efficiency without increasing hardware cost, which comprises the following steps: firstly, when an input signal is a full-white-field signal, on the premise of meeting power consumption, confirming the duty ratio alpha of backlight driving signal input; the threshold APLth of the APL of the signal is obtained; any signal is played, and then the average value APLavg of the APL of each frame of input signal is counted; determining an output value APLout by comparing the size of the APLavg with the size of the APLth; and performing dynamic adjustment on the input APLin of each region of each frame of signal so as to enable the output value to be APLout. By adjusting the driving current of each partition of each frame of signal, the dynamic power consumption is reasonably distributed, and the purpose of improving the energy efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the field of liquid crystal television energy processing, and in particular to a method for dynamically improving energy efficiency of a low-partition liquid crystal television. Background Art

[0002] With the development of technology, more and more LCD TV products use backlight partitioning technology to improve the dynamic contrast of TV. At the same time, the power consumption of LCD TV also depends on the number of partitions. Under the premise of the same dynamic contrast, the more partitions there are, the more accurate the control is, the easier it is to save power consumption, and the higher the energy efficiency is. To improve energy efficiency under low-partition (less than 200 partitions) backlight technology, it is generally achieved by increasing hardware costs. Summary of the invention

[0003] In order to improve energy efficiency without increasing hardware costs, the present application provides a method for dynamically improving energy efficiency of a low-partitioned LCD TV.

[0004] The technical solution adopted by the present invention to solve the above problems is:

[0005] Methods for low-partition LCD TVs to dynamically improve energy efficiency include:

[0006] Step 1: Input a full white field signal and adjust the duty cycle of the backlight driver so that the power of the whole machine is the power output power of the power supply, and the duty cycle is recorded as α;

[0007] Step 2: Set the APL threshold of the signal based on the maximum value A of the input signal and the duty cycle α, denoted as APL_th;

[0008] Step 3: Play any signal, record the input as APL_in, calculate the average value of APL of the current frame signal, record it as APL_avg;

[0009] Step 4: Determine the value of output APL_out based on the ratio of APL_avg to APL_th:

[0010] If APL_avg>APL_th: APL_out=APL_th / APL_avg*APL_in;

[0011] If APL_avg≤APL_th:

[0012] When APL_avg / APL_th>α: APL_out=APL_th / APL_avg*APL_in;

[0013] When APL_avg / APL_th≤α: APL_out=1 / α*APL_in;

[0014] Step 5: If APL_out is greater than A, set APL_out to A;

[0015] Step 6: Dynamically adjust APL_in so that the output meets APL_out.

[0016] Further, APL_th=A*α.

[0017] Furthermore, the maximum value of the input signal is 255, 1023 or 4095.

[0018] Furthermore, the average value of the APL of the current frame signal is calculated by statistically analyzing the histogram information of each frame signal.

[0019] Furthermore, a low partition refers to a partition below 200.

[0020] Compared with the prior art, the present invention has the following beneficial effects: first, when the input signal is a full white field signal, the duty cycle α of the backlight driving signal input is confirmed under the premise of satisfying the power consumption, so as to obtain the threshold APL_th of the APL of the signal; play any signal, and then count the average value APL_avg of the APL of each frame input signal; determine the output value APL_out by comparing the size of APL_avg and APL_th; dynamically adjust the input APL_in of each zone of each frame signal so that the output value is APL_out. By adjusting the driving current size of each partition of each frame signal, the dynamic power consumption is reasonably allocated to achieve the purpose of improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Flowchart of a method for dynamically improving energy efficiency for low-zone LCD TVs;

[0022] Figure 2 is a schematic diagram of the calibration curve;

[0023] Figure 3 It is the calibration curve corresponding to the embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] like Figure 1 As shown, the method for dynamically improving the energy efficiency of low-partition LCD TVs includes:

[0026] Step 1: Input a full white field signal and adjust the duty cycle of the backlight driver so that the power of the whole machine is the power output power of the power supply. The duty cycle is recorded as α (0<α≤1).

[0027] Step 2: Set the APL threshold of the signal based on the maximum value A of the input signal and the duty cycle α, denoted as APL_th, APL_th=A*α, and the maximum values ​​of the input signal corresponding to different bits are: 8bit: 255; 10bit: 1023; 12bit: 4095.

[0028] Step 3: Play any signal, record the input as APL_in, and calculate the average value of the APL of the current frame signal, record it as APL_avg. The average value is obtained by counting the brightness signal values ​​of the backlight of each partition; considering the convenience of use, this embodiment calculates the average value of the APL of the current frame signal by counting the histogram information of each frame signal.

[0029] Step 4: Determine the value of output APL_out based on the ratio of APL_avg to APL_th:

[0030] If APL_avg>APL_th: APL_out=APL_th / APL_avg*APL_in;

[0031] If APL_avg≤APL_th:

[0032] When APL_avg / APL_th>α: APL_out=APL_th / APL_avg*APL_in;

[0033] When APL_avg / APL_th≤α: APL_out=1 / α*APL_in;

[0034] Step 5: If APL_out is greater than A, set APL_out to A;

[0035] Step 6: Dynamically adjust APL_in so that the output meets APL_out. The correction curve is as follows: Figure 2 As shown in the figure, the next frame is statistically determined again from step 3.

[0036] Set the signal to 8-bit input, input a full white field signal, and adjust the backlight drive duty cycle α=0.5;

[0037] Set the threshold value of the signal APL APL_th = 255*α = 127.5;

[0038] Play signal, the APL average value of the current frame signal APL_avg=78;

[0039] APL_avg≤APL_th, APL_avg / APL_th=0.612>α,

[0040] APL_out=APL_th / APL_avg*APL_in=1.635*APL_in;

[0041] If APL_out exceeds 255, APL_out is set to 255;

[0042] Dynamically adjust APL_in to make the output meet APL_out, and get the current correction curve, such as Figure 3 shown.

[0043] Experiments have shown that when the uncorrected curve is used, the energy efficiency index is 4.0. After using the corrected curve, the energy efficiency index is 4.4, which is a significant increase.

Claims

1. A method for dynamically improving energy efficiency of a low-partitioned LCD TV, characterized in that: include: Step 1: Input a full white field signal and adjust the duty cycle of the backlight driver so that the power of the whole machine is the power output power of the power supply, and the duty cycle is recorded as α; Step 2: Set the APL threshold of the signal based on the maximum value A of the input signal and the duty cycle α, denoted as APL_th; Step 3: Play any signal, record the input as APL_in, calculate the average value of APL of the current frame signal, record it as APL_avg; Step 4: Determine the value of output APL_out based on the ratio of APL_avg to APL_th: If APL_avg>APL_th: APL_out=APL_th / APL_avg*APL_in; If APL_avg≤APL_th: When APL_avg / APL_th>α: APL_out=APL_th / APL_avg*APL_in; When APL_avg / APL_th≤α: APL_out=1 / α*APL_in; Step 5: If APL_out is greater than A, set APL_out to A; Step 6: Dynamically adjust APL_in so that the output meets APL_out.

2. The method for dynamically improving energy efficiency of a low-partitioned LCD TV according to claim 1, characterized in that: APL_th=A*α.

3. The method for dynamically improving energy efficiency of a low-partitioned LCD TV according to claim 1, characterized in that: The maximum value of the input signal is 255, 1023 or 4095.

4. The method for dynamically improving energy efficiency of a low-partitioned LCD TV according to claim 1, characterized in that: The average value of the APL of the current frame signal is calculated by counting the histogram information of each frame signal.

5. The method for dynamically improving energy efficiency of a low-partitioned LCD TV according to claim 1, characterized in that: Low partition refers to the partition below 200.

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