CN110444170A - Reduce the control system and method for LCD TV backlight power - Google Patents
Reduce the control system and method for LCD TV backlight power Download PDFInfo
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- CN110444170A CN110444170A CN201910773499.2A CN201910773499A CN110444170A CN 110444170 A CN110444170 A CN 110444170A CN 201910773499 A CN201910773499 A CN 201910773499A CN 110444170 A CN110444170 A CN 110444170A
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- rgb value
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- liquid crystal
- lcd
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to LCD TVs, and it discloses a kind of control systems and method for reducing LCD TV backlight power, and LCD TV backlight power to be adjusted when televising tableaux, to realize energy-saving.The present invention is read out by rgb value of the certain frequency to preset test point on LCD TV screen, and it is compared with a preceding reading value, dynamic analysis are carried out to which the color to broadcasting pictures is constituted, when the value that continuous certain number is read is consistent, it is determined as tableaux, to reduce PWM duty cycle by MCU come adjusting backlight luminance, realize energy-saving.
Description
Technical field
The present invention relates to LCD TVs, and in particular to a kind of control system and method for reducing LCD TV backlight power.
Background technique
LCD TV is made of movement circuit, liquid-crystalline glasses and back light system three parts, and three consumes when normal work
Power, ratio is about are as follows: machine core: 8%, liquid-crystalline glasses: and 7%, back light system: 85%, wherein back light system consumes the overwhelming majority
Power.Backlight can adjust backlight drive circuit by PWM by machine core MCU and be adjusted, when backlight illumination is turned down, power consumption
Also corresponding to reduce.
TV is not needed in playing pictures, home interface, document and when as tableauxes such as electronics picture frame photograph albums
Very high backlight illumination even needs lower brightness sometimes to adapt to specific application scene.Therefore, in static draw of televising
Backlight illumination can be adjusted when face, to realize energy-saving effect.
Summary of the invention
The technical problems to be solved by the present invention are: propose it is a kind of reduce LCD TV backlight power control system and side
Method is adjusted LCD TV backlight power when televising tableaux, to realize energy-saving.
The present invention solve above-mentioned technical problem the technical solution adopted is that:
Reduce the control system of LCD TV backlight power, comprising: the backlight drive of main control MCU and liquid crystal display；
The main control MCU, for reading the RGB on video screen at preset each test point according to certain reading frequency
Be worth and store, when reading each time, rgb value at each test point and the last rgb value read that this is read into
Row compares, and judges whether consistent；If the comparison result for the rgb value that continuous n times are read is consistent, determine that the picture played is quiet
State picture then inputs the control signal for reducing PWM duty cycle to the backlight drive of liquid crystal display；
The backlight drive of the liquid crystal display, in the control signal of reduction PWM duty cycle for receiving main control MCU output
Turn down the back facet current of liquid crystal display.
It is described to judge whether unanimously to refer to as advanced optimizing:
Whether the deviation of rgb value and the last rgb value read at this each test point read is in certain error
In range, if determining that the two is consistent within a certain error range.
There may be certain deviation when due to reading rgb value every time, the present invention controls deviation in certain error model
It encloses, such as ± 5%, then it is consistent to regard as the two.
In addition, the present invention also provides a kind of control methods for reducing LCD TV backlight power comprising following steps:
A, multiple test points on video screen are set；
B, rgb value and the storage at each test point are read according to certain reading frequency；
C, when reading each time, rgb value at each test point and the last rgb value read that this is read into
Row compares, and judges whether unanimously, if the comparison result for the rgb value that continuous n times are read is consistent, determines that the picture played is quiet
State picture, then enter step D, otherwise, it is determined that the picture played is dynamic menu, picture normal play；
D, MCU inputs the control signal for reducing PWM duty cycle, the backlight drive tune of liquid crystal display to the backlight drive of liquid crystal display
The back facet current of low liquid crystal display.
As advanced optimizing, in step A, according to the pixel specification of liquid crystal television screen, M seat is set across the screen
Punctuate is as test point, M test point uniform fold screen area.
By the way that multiple coordinate points for capableing of uniform fold screen area are arranged as test point, enable testing result anti-
The case where reflecting the entire picture on screen improves the accuracy of detection.
The beneficial effects of the present invention are:
Be read out by rgb value of the certain frequency to preset test point on LCD TV screen, and with preceding primary reading
Value is compared, and carries out dynamic analysis to constitute to the color of broadcasting pictures, when the value that continuous certain number is read is kept
When consistent, it is determined as tableaux, to reduce PWM duty cycle by MCU come adjusting backlight luminance, realizes energy-saving.This
Invention has the characteristics that method is simple, accuracy rate is high, does not increase hardware cost, and television backlight function is rationally reduced using testing result
Rate.
Detailed description of the invention
Fig. 1 is the control method flow chart for reducing LCD TV backlight power.
Specific embodiment
The present invention is directed to propose a kind of control system and method for reducing LCD TV backlight power, in static state of televising
When picture, LCD TV backlight power is adjusted, to realize energy-saving.Its core concept is: by continuously detecting
The rgb value of the multiple coordinates of television image, and its changing rule is monitored, picture is judged to be dynamically or static, under still picture
Liquid crystal display backlight illumination is suitably reduced by pwm signal by MCU, reduces TV power consumption.
In specific implementation, the present invention in reduction LCD TV backlight power control system, comprising: main control MCU and
The backlight drive of liquid crystal display；
The main control MCU, for reading the RGB on video screen at preset each test point according to certain reading frequency
Be worth and store, when reading each time, rgb value at each test point and the last rgb value read that this is read into
Row compares, and judges whether consistent；If the comparison result for the rgb value that continuous n times are read is consistent, determine that the picture played is quiet
State picture then inputs the control signal for reducing PWM duty cycle to the backlight drive of liquid crystal display；
The backlight drive of the liquid crystal display, in the control signal of reduction PWM duty cycle for receiving main control MCU output
Turn down the back facet current of liquid crystal display.
Embodiment:
The present embodiment is the implementation of the control method for the reduction LCD TV backlight power realized based on above-mentioned control system
Case, as shown in Figure 1, itself the following steps are included:
1, the test point of video screen is set:
According to the pixel specification of liquid crystal display, M coordinate points are set on entire video screen, as taking for detection rgb value
Sampling point.Sample point wants each region of uniform fold screen, allows testing result that can represent whole secondary picture RGB color situation.The value of M can
To be arranged according to actual needs, those skilled in the art it is clear that, if the value of M be arranged it is bigger, for quiet
It is more accurate that the detection of state picture determines, but overhead is also bigger, and detection efficiency also accordingly reduces.
2, MCU reads the rgb value of each test point:
After television startup, the RGB of each test point is continuously read respectively according to the reading frequency of setting by master chip MCU
Value, will test result and is kept in MCU, is compared so as to subsequent；
3, the rgb value of this test point read is compared with last:
After reading rgb value each time, all it is compared with the rgb value of test point last time, if all test point sheets
The rgb value of secondary reading is consistent with the value that the last time reads (can be set in reasonable error range, such as ± 5% and think one
Cause), then it is recorded as 1 successful match, enters step 4；If inconsistent, it is determined as dynamic menu, normal play picture,
Without carrying out screen intensity adjusting；
4, judge whether continuous coupling number reaches n times:
When the number of continuous coupling reaches n times, determine that the picture played is tableaux, the value of N can be according to demand
Customized setting, for example be set as 5, that is, indicating that the rgb value of continuous 5 detections of all test points is consistent (can set conjunction
Think in the error range of reason, such as ± 5% consistent) when be determined as tableaux；
Those skilled in the art it is clear that, the value of N is arranged bigger, then more quasi- for the judgement of tableaux
Really, but overhead is also bigger, determines that efficiency also accordingly reduces.
4, MCU adjusts liquid crystal display backlight illumination by PWM:
After detecting tableaux, MCU inputs pwm control signal by the GPIO mouthfuls of backlight drives to liquid crystal display, adjusts
The duty ratio (specific amplitude can sets itself) of low PWM, PWM duty cycle turns down backlight electricity to backlight drive circuit based on the received
Stream, to reduce power and the brightness of backlight.
Claims (4)
1. reducing the control system of LCD TV backlight power, comprising: the backlight drive of main control MCU and liquid crystal display；Its feature exists
In,
The main control MCU, for reading the rgb value on video screen at preset each test point according to certain reading frequency simultaneously
Storage, when reading each time, the rgb value that the rgb value at each test point that this is read is read with the last time compares
Compared with judging whether consistent；If the comparison result for the rgb value that continuous n times are read is consistent, determine that the picture played is drawn for static state
Face then inputs the control signal for reducing PWM duty cycle to the backlight drive of liquid crystal display；
The backlight drive of the liquid crystal display, for being turned down when receiving the control signal of reduction PWM duty cycle of main control MCU output
The back facet current of liquid crystal display.
2. reducing the control system of LCD TV backlight power as described in claim 1, which is characterized in that
It is described to judge whether unanimously to refer to:
Whether the deviation of rgb value and the last rgb value read at this each test point read is in certain error range
It is interior, if determining that the two is consistent within a certain error range.
3. reducing the control method of LCD TV backlight power, it is applied to system as claimed in claim 1 or 2, feature exists
In, comprising the following steps:
A, multiple test points on video screen are set；
B, rgb value and the storage at each test point are read according to certain reading frequency；
C, MCU is when reading each time, the rgb value at each test point and the last rgb value read that this is read into
Row compares, and judges whether unanimously, if the comparison result for the rgb value that continuous n times are read is consistent, determines that the picture played is quiet
State picture, then enter step D, otherwise, it is determined that the picture played is dynamic menu, picture normal play；
D, the control signal for reducing PWM duty cycle is inputted to the backlight drive of liquid crystal display, the backlight drive of liquid crystal display turns down liquid crystal
The back facet current of screen.
4. reducing the control method of LCD TV backlight power as claimed in claim 3, which is characterized in that
In step A, according to the pixel specification of liquid crystal television screen, M coordinate points are set across the screen as test point, M is a
Test point uniform fold screen area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773499.2A CN110444170A (en) | 2019-08-21 | 2019-08-21 | Reduce the control system and method for LCD TV backlight power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910773499.2A CN110444170A (en) | 2019-08-21 | 2019-08-21 | Reduce the control system and method for LCD TV backlight power |
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| CN110444170A true CN110444170A (en) | 2019-11-12 |
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| CN201910773499.2A Pending CN110444170A (en) | 2019-08-21 | 2019-08-21 | Reduce the control system and method for LCD TV backlight power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111862895A (en) * | 2020-08-31 | 2020-10-30 | 广州朗国电子科技有限公司 | Global backlight energy consumption reduction method and device, storage medium and display equipment |
| EP4177875A4 (en) * | 2021-09-22 | 2023-06-21 | Honor Device Co., Ltd. | Display driving method based on frame data, and electronic device and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546540A (en) * | 2009-04-29 | 2009-09-30 | 深圳华映显示科技有限公司 | Grey insertion method and drive circuit for LCD display |
| CN101661712A (en) * | 2009-10-05 | 2010-03-03 | 福州华映视讯有限公司 | Color sequence displayer and correlative electricity-saving method |
| CN101751877A (en) * | 2008-12-05 | 2010-06-23 | 康佳集团股份有限公司 | LCD TV energy saving device and method |
| CN102157133A (en) * | 2010-02-12 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and backlight control method |
| CN102157140A (en) * | 2010-02-11 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and control method of backlight control device |
| KR20120036062A (en) * | 2010-10-07 | 2012-04-17 | 엘지디스플레이 주식회사 | Liquid crystal display device and driving method thereof |
| CN105609086A (en) * | 2015-12-30 | 2016-05-25 | 深圳Tcl数字技术有限公司 | Brightness adjustment method and device of display interface |
-
2019
- 2019-08-21 CN CN201910773499.2A patent/CN110444170A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101751877A (en) * | 2008-12-05 | 2010-06-23 | 康佳集团股份有限公司 | LCD TV energy saving device and method |
| CN101546540A (en) * | 2009-04-29 | 2009-09-30 | 深圳华映显示科技有限公司 | Grey insertion method and drive circuit for LCD display |
| CN101661712A (en) * | 2009-10-05 | 2010-03-03 | 福州华映视讯有限公司 | Color sequence displayer and correlative electricity-saving method |
| CN102157140A (en) * | 2010-02-11 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and control method of backlight control device |
| CN102157133A (en) * | 2010-02-12 | 2011-08-17 | 联咏科技股份有限公司 | Backlight control device and backlight control method |
| KR20120036062A (en) * | 2010-10-07 | 2012-04-17 | 엘지디스플레이 주식회사 | Liquid crystal display device and driving method thereof |
| CN105609086A (en) * | 2015-12-30 | 2016-05-25 | 深圳Tcl数字技术有限公司 | Brightness adjustment method and device of display interface |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111862895A (en) * | 2020-08-31 | 2020-10-30 | 广州朗国电子科技有限公司 | Global backlight energy consumption reduction method and device, storage medium and display equipment |
| CN111862895B (en) * | 2020-08-31 | 2021-08-31 | 广州朗国电子科技有限公司 | Global backlight energy consumption reduction method and device, storage medium and display equipment |
| EP4177875A4 (en) * | 2021-09-22 | 2023-06-21 | Honor Device Co., Ltd. | Display driving method based on frame data, and electronic device and storage medium |
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Application publication date: 20191112 |