项目名称： 具有T-PWM超深度调光技术的智能电源

LTECH T-PWM Super Depth Dimming Intelligent dimmable driver

申报单位： 珠海雷特科技股份有限公司

综合介绍或申报理由：

1.自创T-PWM超深度调光技术，满足各种不同的商业空间灯光效果需求，最低亮度小于0.01%，达到行业领先水准；

2.调光精确度高，调光过程不产生LED色偏，不影响LED寿命；

3.选用独特的程序算法与硬件搭配，人眼视觉感受更加舒适，低亮度调光极致柔和。

4.调光无频闪，依据IEEE 1789标准测试，达到高频豁免级别；

1. Self-created T-PWM Super depth dimming technology, which can meet various commercial space lighting effect requirements, with the minimum brightness less than 0.01%, reaching the industry-leading level;

2. High dimming accuracy, this is not produce LED color deviation in the dimming process, and does not affect the life of the LED;

3. The unique program algorithm and hardware combination make the human visual perception more comfortable, and the low-brightness dimming is extremely soft.

4. Dimming without flicker according to the IEEE 1789 standard test, reach the high frequency exemption level;

主要技术参数：

输出OUTPUT:
工作电压范围Output Voltage：10-42Vdc
最大输出电压Max Output Voltage ：48Vdc
工作电流范围Output Current：300-900mA
负载功率范围Output Power Range：3W-30W
频闪级别Fluctuation Depth：高频豁免级别Exemption assessment level.
调光范围Dimming Range：0~100%，调光深度dimming depth0.01%
PWM频率PWM Frequency：≤3600 Hz
低频电流纹波（<120Hz）LF current ripple(<120hz)：<2%
电流精度Current Accuracy：±5%
纹波与噪声Ripple & Noise：≤2V

输入INPUT：
调光接口Dimming Interface : 0-10V(1-10V-10V PWM/RX),PUSH DIM
输入电压Input Voltage Range：100-240Vac，127-250Vdc（直流输入不支持Push Dim）
频率范围Frequency ：0/50/60Hz
输入电流Input Current：115Vac≤0.31A，230Vac≤0.18A
功率因素Power Factor：PF>0.98/115Vac PF>0.92/230Vac (满载)
谐波THD : 230Vac@THD≤12% (满载)
效率Efficiency ：>85%
浪涌电流Inrush Current(typ.)：冷启动6.4A/230Vac;在50%Ipeak下测试twidth=50us
Cold start 6.4A at 230Vac (twidth=50μs measured at 50% Ipeak)
抗浪涌Control surge capability：L-N: 1kV
漏电流Leakage Current ：<0.5mA/230Vac

环境ENVIRONMENT：
工作温度Working Temperature：ta: -20 ~ 50℃，tc: 75℃
工作湿度Working Huity：20 ~ 95%RH, 无冷凝 non-condensing
储存温度\湿度Storage Temp., Huity：-40 ~ 80℃, 10~95%RH
温度系数Temp. Coefficient：±0.03%/°C(0-50℃)
耐振动Vibration ：10-500HZ, 2G 12分钟/周期，X,Y,Z轴各72分钟。
10~500Hz, 2G 12min./1cycle, period for 72min. each along X, Y, Z axes.

不同品牌调光驱动方式的效果对比图；Contrast diagram of the effect of different brands of dimming optical drive mode

中文文章链接Link：http://www.ltech.cn/html/News/T-PWM.html

英文文章链接Link：http://www.ltech.cn/html/en/news/T-PWM.html

T-PWM调光展示视频；T-PWM dimming video display
中文视频链接Link：https://v.qq.com/x/page/c0754o37nlv.html
英文视频链接Link：https://v.qq.com/x/page/a07547ch51y.html

与国内外同类产品或同类技术的比较情况：

一、与CCR模拟调光的对比：Compare to CCR analog dimming
模拟调光/电流恒定降低（CCR, Constant Current Reduction）调光，指的就是改变通过LED的电流来线性调整LED的亮度，理想情况下LED的亮度与通过电流成正比。
这种调光原理在LED上进行调光时有以下几个特性：

Analog dimming/ CCR (Constant Current Reduction) dimming refers to the linear adjustment of LED brightness by changing the current passing through LED. Ideally, the brightness of LED is proportional to the passing current.
This dimming principle has following acteristics when dimming LED:

【优势】
调光时不产生低噪声，在使用数码摄像设备拍照摄影不容易产生纹波及闪烁。

【劣势】
1.当电流发生变化时会造成LED的色偏。
2.模拟调光的范围较窄，多台电源控制时一致性、调光线性差。
3.LED不是在额定的电压和电流下工作，长期工作会缩短LED使用寿命。
4.由于LED驱动器始终处于工作状态，随着电流减少，LED驱动器转换效率迅速降低，因此会增加电源系统的功率损耗。

【Advantages】
1.Without low noise in dimming. In the use of digital camera equipment photography, not easy to produce ripple and flicker.

【Shortages】
1.It will cause color shift of the LED when current changes.
2.Narrow dimming range, poor dimming consistency and linearity at multiple drivers.
3.LED is not working with rated voltage and current and the LED life would be shorten in long-term working.
4.The LED driver conversion efficiency would rapidly reduce with the reduction of current, thus increasing the power loss of the power system.

二、与CCR+PWM混合调光的对比：compare to CCR+PWM dimming
CCR（模拟）+PWM调光，指的是在模拟调光的基础上在低区加入PWM调光，其目的是希望通过PWM来弥补模拟调光范围不足的问题，同时保留模拟调光中高区拍摄无频闪的优势。但在吸收两者优点的同时，也将两者缺点兼并了过来，在实际应用过程中表现的特性为：

【优势】
1.对比单纯的模拟调光，调光范围向低亮度延伸，应用场景更广。
2.保留了中高亮度下的调光无频闪的优势。

【劣势】
1.模拟调光时精准度不高，调光线性不好的问题并没有改善。
2.在模拟与PWM转变的时候会不自然。
3.低亮度下PWM调光仍可能存在频闪问题，部分拍摄会有纹波现象。
4.低区PWM是技术难点，大部分厂商在完成转入PWM调光后，调光存在响应延时

CCR（Analog）+ PWM Dimming means on the basis of analog dimming adding the PWM dimming mode at low brightness, which aims to make up the insufficient dimming range of CCR, at the same time keep the advantage of non-flicker at high brightness dimming of CCR. But both advantages absorb but also defects. The practical problems are as following:

【Advantages】
1.Wider dimming range comparing to pure analog dimming, and wider application.
2.Keep the advantage of non-flicker at dle and high brightness dimming.

【Shortages】
1.The accuracy of analog dimming is not high, and the problem of poor dimming linearity has not been improved.
2.Unnatural during analog and PWM transitions.
3.PWM dimming may still exist stroboscopic problems at low brightness, and some shots may exist ripple phenomenon.
4.At Low brightness of PWM is technical difficulty. Most manufacturers have a response delay dimming after they add PWM dimming into CCR.

三、与普通PWM调光的对比：Compare to PWM dimming
脉冲宽度调制（PWM, Pulse Width Modulation），简称脉宽调制。原理是通过PWM 波开启和关闭LED 来改变正向电流的导通时间以达到亮度调节的效果。
这个方式常常被比喻成高频次的开关动作，即LED反复处于0%亮度及100%亮度，所以PWM优势和劣势都很容易凸显（如低亮度下的频闪问题），对PWM技术的控制及打磨决定PWM调光的好坏，所以常规情况下的PWM特性也很明显：

【优势】
1.调光精确度极高，调光过程不会产生任何LED色偏，不影响LED寿命。
2.优质的PWM调光，在很大范围内调光也不会发生闪烁现象。

【劣势】
1.PWM调光时，程序与硬件配合不好容易使驱动电路产生人耳听得见的低噪。
2.若PWM脉冲频率很低的话，人眼就会感到闪烁，如果频率不高，普通数码摄像产品拍照摄影也可以捕抓到波纹、频闪现象。
3.若PWM频率过高，虽然可以达到无频闪的标准，但是调光灰度级别区间则会缩减，并在低亮度时出现闪烁。

Pulse Width Modulation(PWM), which principle is to change the on-time of forward current by the PWM wave to turn the LED on and off to achieve the brightness adjustment effect.

This mode is often compared to a high-frequency switching action, that is the LED is repeatedly at 0% and 100% brightness, so the advantages and disadvantages of PWM are obvious (such as stroboscopic problems at low brightness). The control and development of PWM technology determines the quality of PWM dimming. So commonly features of PWM dimming are also obvious:

【Advantages】
1.Extremely high dimming accuracy, no color shift during dimming process, and won’t affect LED life.
2.High-quality PWM dimming, non-flicker in a wide range of dimming.

【Shortages】

1.If the PWM program and hardware do not match well, the drive circuit would easily cause low noise during dimming.

2.If the PWM pulse frequency is very low, human eyes will feel flicker. And if the frequency is not high, even ordinary digital camera devices can capture ripples and stroboscopic phenomena.

3.If the PWM frequency is too high, although it will up to flicker-free standard, but the dimming gray level range will be reduced and have flicker at low brightness.

技术及工艺创新要点：

1.优化调光算法，调光过程肉眼观测或者视频拍照无抖动，超顺滑；

2.根据硬件特点，软件调整调光曲线，视频拍照实现无条纹；

3.具有变频技术，根据不同的亮度，改变调光频率，实现超低亮度设计，模拟自然光亮灭。

1. Optimized dimming algorithm, no jitter in naked eye observation or video photography during dimming process, super smooth;

2. According to the hardware acteristics, the software adjusts the dimming curve, and the video camera can take pictures without stripes;

3. With frequency conversion technology, according to different brightness, change the dimming frequency, to achieve ultra-low brightness design, simulation of natural light off.

实际运用案例和用户评价意见：

案例一、华为智能生活馆 Case 1 Huawei Smart Life Pavilion ；
案例链接Link：http://www.ltech.cn/html/About/Project-Cases/huawei.html

案例二、阿里未来酒店 Case 2. Alibaba Furuter hotel ；
案例链接 Link：http://www.ltech.cn/html/About/Project-Cases/ali.html

获奖、专利情况：

1.国家电光源质量检验中心出具的无频闪测试报告文件；

No stroboscopic test report issued by national electric light source quality inspection center

2.T-PWM商标注册文件；

Trademark registration documents

3.3C认证

是否有“智能设计”？

1.内置MCU，可定制编程、调光曲线及渐变时间等;

2.变频调光技术，0-100%全范围深度调光；

3.灯光缓启动、缓关闭设计，呈现更舒适的照明体验；

4.创新的热管理技术，保护电源寿命

5.自动识别0-10V/1-10V输入，智能切换调光范围，匹配0-10V/1-10V调光器；

1. Built-in MCU, customizable programming, dimming curve and gradient time, etc.;

2. Variable frequency dimming technology, 0-100% full range depth dimming;

3. Slow start and slow close design of lights, presenting a more comfortable lighting experience;

4. Innovative thermal management technology to protect power life

5. Automatic identification of 0-10v / 1-10v input, intelligent switching dimming range, matching 0-10v / 1-10v dimmer;

申报单位介绍：

雷特科技（股票代码：832110）是位于珠海的国际化科技公司，自2001年起，致力于LED智能控制技术的研究与创新，是中国首家LED照明控制器的制造商。

LTECH(Stock Code: 832110) is an international technology company located in Zhuhai, we have engaged in R&D of LED lighting control technology since 2001,is Chinese first LED lighting controller manufacturers.

十八年的技术沉淀积累，雷特拥有过百项专利，打造了LED控制器、智能调光电源、智能家居三大产品线，首创T-PWM超深度调光技术，亮度低于0.01%，调光过程全程无抖动，频闪测试仪测试无频闪或达到高频豁免级别

After 18 years of technical accumulation, LTECH has owned more than 100 patents, created three product lines of LED controller, intelligent dimming power supply and smart home, and initiated T-PWM super depth dimming technology with brightness lower than 0.01%,no flicker in the whole dimming process, and stroboscopic tester can test without stroboscopic or reach the high frequency exemption level.

雷特的创新产品被应用到世界各地，为著名的地标建筑、主题乐园、星级酒店、办公大楼、高级商场等上万个中大型照明工程提供了优质产品与解决方案，深获各界的认同与赞誉。

LTECH innovative products have been applied all over the world, providing high-quality products and solutions for tens of thousands of medium and large lighting projects, such as famous landmarks, theme parks, star hotels, office buildings and high-end shopping malls, which have won recognition and praise all walks of life.

产品图片：