CN103345907A - Automatic regulator of LED backlight optical parameters based on ambient light detection - Google Patents
Automatic regulator of LED backlight optical parameters based on ambient light detection Download PDFInfo
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- CN103345907A CN103345907A CN2013103041314A CN201310304131A CN103345907A CN 103345907 A CN103345907 A CN 103345907A CN 2013103041314 A CN2013103041314 A CN 2013103041314A CN 201310304131 A CN201310304131 A CN 201310304131A CN 103345907 A CN103345907 A CN 103345907A
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Abstract
An automatic regulator of LED backlight optical parameters based on ambient light detection comprises an I2C interface, an illumination calculating module, a luminance comparator, a luminance value register, a data sending module and a luminance value regulating module. The I2C interface is connected with the illumination calculating module; the illumination calculating module is connected with the luminance comparator; the luminance comparator and the luminance value register are used for comparing the luminance value of ambient light with a backlight luminance value of the last condition and stored in a current luminance value register; the luminance value register is connected with the data sending module; the data sending module is connected with the luminance comparator and the luminance value regulating module; the luminance value regulating module is connected with the luminance comparator. In order to make full use of the advantages of an LED backlight television in the aspects of picture quality and an energy-saving lamp, the parameter regulation can be conducted on the automobile regulator according to the visual effect of the eyes of a person and the automobile regulator can protect the vision of a watcher and can release visual fatigue of the watcher.
Description
Technical field
The invention belongs to the display backlight technical field, particularly relate to a kind of automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting.
Background technology
In recent years, concepts such as environmental protection, energy-conservation, the low-carbon (LC) popular feeling that deepens continuously, country has also formulated LCD TV efficiency classification standard, forbid that non-compliant product comes into the market, and the level of power consumption of LCD product is divided demarcation, make the consumer when selecting product for use, can more fully understand its performance, so only according to energy-conservation these characteristics, make the LCD product of LED as backlight, constantly dominate the market.No matter be illumination or demonstration field, the backlight of liquid crystal display just constantly from the CCFL backlight to the transition of LED-backlit source.Compare with CCFL, LED is as a kind of new type light source, and photoelectric effect is greatly improved, and the colour gamut coverage rate that has overcome CCFL is narrow, high voltage control, shortcoming such as frangible, mercurous, color is abundanter, and dynamic contrast has greatly improved than the common display screen.In the advantages such as LED controls in its no mercury environmental protection of performance, low-voltage, the colour gamut coverage rate is wide, the life-span is long, because its volume is little, luminescence efficiency is high, therefore light, thin, low in power consumption have occurred in structural design, this also makes the market competitiveness of LED-backlit source display screen highlight more.But, LED-backlit source optical parametric on the LED-backlit TV of using always all is fixing at present, can't regulate automatically, and beholder's eyesight has nothing in common with each other, therefore watch this TV to cause visual fatigue easily for a long time, thereby beholder's eyesight is had certain detrimental effect.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting.
In order to achieve the above object, the automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention comprises: I2C interface, illuminance are calculated module, brightness comparer, brightness value register, data transmission blocks and brightness value adjustment module; Wherein: the I2C interface is I2C serial data transmitting-receiving interface circuit, and it is connected with illuminance calculating module, is used for reading the surround lighting detection data that the surround lighting detection module collects from the outside by the I2C bus, and sends it to illuminance calculating module;
It is digital operation module that illuminance is calculated module, and it is connected with the brightness comparer, is used for going out actual ambient light value according to the data computation that the surround lighting detection module is gathered, and sends this value to brightness comparer 3;
Brightness comparer and brightness value register, the backlight brightness values that is used for previous state that ambient light value and current brightness value register are preserved compares, to judge that current whether the needs adjust backlight illumination, if judged result is "Yes", then by the brightness value adjustment module backlight brightness values is adjusted, tried to achieve current backlight brightness values; Otherwise keep former backlight brightness values constant;
The brightness value register is connected with data transmission blocks, is used for the current backlight brightness values of storage;
Data transmission blocks is connected with the brightness value adjustment module with the brightness comparer, and the current backlight brightness value that is used for finally obtaining sends to LCD display, and current backlight brightness values is kept among the brightness value register;
The brightness value adjustment module is connected with the brightness comparer, is used for the comparing result according to the brightness comparer, and backlight brightness values is adjusted.
The automatic regulator of the described LED-backlit source optical parametric of surveying based on surround lighting adopts the CPLD programmable logic device (PLD) to realize.
In order to bring into play the LED-backlit TV better in the advantage aspect image quality, the electricity-saving lamp; the automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention is significant in energy-conserving and environment-protective; because it is to carry out according to the visual effect of human eye that its parameter is regulated; eyesight to the beholder has the certain protection effect, also can alleviate beholder's visual fatigue simultaneously.
Description of drawings
Fig. 1 is the automatic regulator structural representation of the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention.
Embodiment
Be elaborated below in conjunction with the automatic regulator of the drawings and specific embodiments to the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention.
As shown in Figure 1, the automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention comprises: I2C interface 1, illuminance are calculated module 2, brightness comparer 3, brightness value register 4, data transmission blocks 5 and brightness value adjustment module 6; Wherein: I2C interface 1 is I2C serial data transmitting-receiving interface circuit, it calculates module 2 with illuminance and is connected, be used for reading the surround lighting detection data that surround lighting detection module 7 collects from the outside by the I2C bus, and send it to illuminance calculating module 2;
It is digital operation module that illuminance is calculated module 2, and it is connected with brightness comparer 3, is used for going out actual ambient light value according to the data computation that surround lighting detection module 7 is gathered, and sends this value to brightness comparer 3;
Brightness comparer 3 and brightness value register 4, be used for the backlight brightness values of ambient light value with the previous state of current brightness value register 4 preservations compared, to judge that current whether the needs adjust backlight illumination, if judged result is "Yes", then adjusted by 6 pairs of backlight brightness values of brightness value adjustment module, try to achieve current backlight brightness values; Otherwise keep former backlight brightness values constant;
Brightness value adjustment module 6 is connected with brightness comparer 3, is used for the comparing result according to brightness comparer 3, and backlight brightness values is adjusted.
The automatic regulator of the described LED-backlit source optical parametric of surveying based on surround lighting adopts the CPLD programmable logic device (PLD) to realize.
The workflow of this regulator inner function module is as follows:
The ambient light intensity signal that surround lighting detection module 7 detects is read in this regulator by the I2C bus interface, calculate formula according to illuminance afterwards and calculate corresponding ambient light, relation between recycling surround lighting and backlight illumination, calculate the backlight illumination and the PWM dutycycle that need adjusting, the brightness value current with LCD display compares, judge whether change backlight intensity, if need not change then keep intact, revise if need, then ambient light value and the brightness range that calculates compared, need to determine the gray scale of adjusting, be input to the dutycycle that LED drives the pwm signal of chip thereby change, to change the brightness of LED, come to be fit to the brightness in the current external world thus, realize the automatic adjusting of LCD display brightness.
This regulator reads the data in the ADC register in the surround lighting detection module 7 by the I2C bus interface, by the current light conditions of output after the computing, with comparer of its value input, compare with current screen brightness afterwards, judge whether to need to regulate brightness.Calculate brightness regulation value module according to another output---current extraneous brightness value and the current brightness value of LCD of comparer, calculate the regulated value of LCD brightness, and by data transmission blocks the brightness of LCD display 8 is adjusted.
Surround lighting detection module 7 is ambient light sensor TSL2550T, and it provides SMBus interface, communicates by the SMBData signal with this regulator.In order to guarantee the synchronous of system, the clock of TSL2550 can be provided by this regulator.This regulator reads a secondary data from TSL2550T at set intervals.The conversion that TSL2550T finishes two passages needs 800ms altogether, therefore in time sequence control, produces a beginning condition every one second kind, so just can avoid the brightness of LED-backlit source too frequent.This regulator is according to the data that read, and the brightness that interpretation need be regulated when regulated value and current brightness differ big, is visually discovered to some extent in order not make the beholder, selects the intermediate value of current brightness and theoretical brightness.
The automatic regulator of the LED-backlit source optical parametric of surveying based on surround lighting provided by the invention by detect, parameter is regulated, LED drives, the output of surround lighting detecting module is transferred to this regulator, then according to present brightness and brightness regulation principle, pwm signal is inputed to led driver, finally reach the purpose of automatic adjusting LED brightness, make the brightness of display be more suitable for watching of human eye, also more energy-conservation.
Claims (2)
1. the automatic regulator of a LED-backlit source optical parametric of surveying based on surround lighting, it is characterized in that: described automatic regulator comprises: I2C interface (1), illuminance are calculated module (2), brightness comparer (3), brightness value register (4), data transmission blocks (5) and brightness value adjustment module (6); Wherein: I2C interface (1) is I2C serial data transmitting-receiving interface circuit, it calculates module (2) with illuminance and is connected, be used for reading the surround lighting detection data that surround lighting detection module (7) collects from the outside by the I2C bus, and send it to illuminance calculating module (2);
It is digital operation module that illuminance is calculated module (2), and it is connected with brightness comparer (3), is used for going out actual ambient light value according to the data computation that surround lighting detection module (7) is gathered, and sends this value to brightness comparer (3);
Brightness comparer (3) and brightness value register (4), be used for the backlight brightness values of ambient light value with the previous state of current brightness value register (4) preservation compared, to judge that current whether the needs adjust backlight illumination, if judged result is "Yes", then by brightness value adjustment module (6) backlight brightness values is adjusted, tried to achieve current backlight brightness values; Otherwise keep former backlight brightness values constant;
Brightness value register (4) is connected with data transmission blocks 5, is used for the current backlight brightness values of storage;
Data transmission blocks (5) is connected with brightness value adjustment module (6) with brightness comparer (3), the current backlight brightness value that is used for finally obtaining sends to LCD display (8), and current backlight brightness values is kept among the brightness value register (4);
Brightness value adjustment module (6) is connected with brightness comparer (3), is used for the comparing result according to brightness comparer (3), and backlight brightness values is adjusted.
2. automatic regulator according to claim 1 is characterized in that: the automatic regulator of the described LED-backlit source optical parametric of surveying based on surround lighting adopts the CPLD programmable logic device (PLD) to realize.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240660A (en) * | 2014-09-01 | 2014-12-24 | 京东方科技集团股份有限公司 | Liquid crystal display panel driving parameter adjusting method and device and liquid crystal display panel |
| CN104464647A (en) * | 2014-11-28 | 2015-03-25 | 广东欧珀移动通信有限公司 | Backlight brightness adjusting method and terminal |
| CN105632459A (en) * | 2016-03-28 | 2016-06-01 | 山东超越数控电子有限公司 | Computer display screen brightness adaptive adjustment method |
| CN113205780A (en) * | 2021-04-16 | 2021-08-03 | 广州朗国电子科技有限公司 | Adaptation method and system for integrated I2C light sensing module of all-in-one machine |
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| CN1862334A (en) * | 2005-05-11 | 2006-11-15 | 英华达(上海)电子有限公司 | Hand-held automatic apparatus for regulating backlight brightness and effect and method thereof |
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN202512856U (en) * | 2012-03-09 | 2012-10-31 | 艾默生过程控制流量技术有限公司 | Backlight control device and display device using same |
| CN103179748A (en) * | 2013-02-04 | 2013-06-26 | 广东美的制冷设备有限公司 | Remote control, and backlight control method and backlight control system thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1862334A (en) * | 2005-05-11 | 2006-11-15 | 英华达(上海)电子有限公司 | Hand-held automatic apparatus for regulating backlight brightness and effect and method thereof |
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN202512856U (en) * | 2012-03-09 | 2012-10-31 | 艾默生过程控制流量技术有限公司 | Backlight control device and display device using same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240660A (en) * | 2014-09-01 | 2014-12-24 | 京东方科技集团股份有限公司 | Liquid crystal display panel driving parameter adjusting method and device and liquid crystal display panel |
| CN104464647A (en) * | 2014-11-28 | 2015-03-25 | 广东欧珀移动通信有限公司 | Backlight brightness adjusting method and terminal |
| CN105632459A (en) * | 2016-03-28 | 2016-06-01 | 山东超越数控电子有限公司 | Computer display screen brightness adaptive adjustment method |
| CN113205780A (en) * | 2021-04-16 | 2021-08-03 | 广州朗国电子科技有限公司 | Adaptation method and system for integrated I2C light sensing module of all-in-one machine |
| CN113205780B (en) * | 2021-04-16 | 2022-08-30 | 广州朗国电子科技股份有限公司 | Adaptive method and system for integrated I2C light sensing module of all-in-one machine |
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Application publication date: 20131009 |