2021年11月发行华凌电子报 153期 www.winstar.com.tw
 
华凌光电 - 电子报
华凌电子报 第153期
 
本期內容
1) WEN025664D-CTP – 5.5寸 电容触控 OLED 含 PCB模块
2) WEA160128A – 1.92 寸 OLED 含 PCB模块
3) 解决方案: 防护紫外线伤害而延长OLED寿命

 

 

WEN025664D-CTP – 5.5寸 电容触控 OLED 含 PCB模块

WEN025664D-CTP 是5.5寸工业级COF绘图型OLED显示器,含有铁框和电容式触控面板,分辨率为 256x64 dots。 此OLED模块内置SSD1322 COF IC 可支持8-bit 6800/8080接口与3线/4线SPI接口。模块支持16 (4 bit)灰阶,使用3V逻辑供电电压,50%显示画面耗电流240mA @3.0V VDD (typical值),驱动方式1/64 duty。此模块搭配电容式触控面板,触控面板内置GT911 IC支持I2C接口 ,支持单点触控,加值CTP触控模块方便客户整合人机接口。模块上设计含PCB板的优点是PCB适合客户使用导线连接,不需开发PCB。此外,整合VCC 电路客户更容易上手,同时支持多种接线方式:PIN、FFC、CN、FPC。

PCB板上有四个螺丝孔方便让客户将模块固定在应用产品上,此OLED 模块适用于智能家电、工控设备、智能检测、智能手表、智能医疗设备等。 WEN025664D-CTP 型号可在 -20°C ~ +70°C 的温度下工作; 其储存温度范围为 -30°C ~ +80°C。

 
WEN025664D-CTP 规格说明
点阵 256 × 64 Dots
模块尺寸 147.0 × 59 × 4.8 mm
有效区域尺寸 135.65 × 33.89 mm
点大小 0.5 × 0.5 mm
点间距 0.53  × 0.53 mm
显示模式 Passive Matrix OLED
显示颜色 可选 绿色/黄色
驱动方式 1/64 Duty
OLED IC SSD1322
接口 6800, 8080, SPI
尺寸 5.5 寸
CTP IC GT911
触控点 1 点
CTP 接口 I2C
表面 亮面
WEN025664D-CTP

 

WEN025664D-CTP

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WEA160128A – 1.92 寸 OLED 含 PCB模块

WEA160128A型号是WEO160128A标准品的延伸产品,WEA160128A在模块加上PCB板。模块对角线尺寸为1.92寸,分辨率160x128 dots。这种设计有四个螺丝孔的PCB板是让客户能简易将模块固定在应用产品,模块上提供标准排PIN (2.54mm pin hole)方便客户连接到产品上,PCB板已设计好升压电路,客户只需提供一组VDD电压即可使用。

WEA160128A OLED模块内置SH1108 IC支持4线SPI接口,驱动方式1/128 duty,适用3V逻辑供电电压,50%显示画面耗电流100mA @3.0V VDD (typical值)。此OLED模块适合用于智能家电、工控设备、智能检测、智能手表、智能医疗设备等。模块工作温度范围 -40°C ~ +80°C;储存温度范围 -40°C ~ +85°C。

 
WEA160128A 规格说明
点阵 160 × 128 Dots
模块尺寸 34.90 × 57.80 × 5.36 Max. mm
有效区域尺寸 28.908 x 39.34 mm
点大小 0.206 × 0.226 mm
点间距 0.226 x 0.246 mm
显示模式 Passive Matrix OLED
显示颜色 可选 黄色/白色
驱动方式 1/128 Duty
OLED IC SH1108
OLED 接口 4线SPI
尺寸 1.92 寸
WEA160128A

 

WEA160128A

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解决方案 防护紫外线伤害而延长OLED寿命

紫外线(UV)光比可见光波长更短且能量更大(如图1所示),众所周知,如果暴露在高强度的紫外线环境中 , 紫外线会对人体造成伤害。另外还有一些东西也会受到紫外线的伤害,比如OLED显示器中的有机材料。

Figure1 The electromagnetic spectrum

[图1 光谱分布图]

 

通常会使用紫外线指数 (UV index) 来定义紫外线的强度,它是衡量特定地点和时间紫外线辐射强度 对人体所造成伤害的 国际标准。 如表1所示。

UV index Media graphic color Risk of harm from unprotected sun exposure, for the average adult Recommended protection
0 to 2 Green "Low" A UV index reading of 0 to 2 means low danger from the Sun's UV rays for the average person. Wear sunglasses on bright days. If you burn easily, cover up and use broad spectrum SPF 15+ sunscreen. Bright surfaces, sand, water, and snow, will increase UV exposure.
3 to 5 Yellow "Moderate" A UV index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure. Stay in shade near midday when the Sun is strongest. If outdoors, wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 15+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Bright surfaces, such as sand, water, and snow, will increase UV exposure.
6 to 7 Orange "High" A UV index reading of 6 to 7 means high risk of harm from unprotected sun exposure. Protection against skin and eye damage is needed. Reduce time in the sun between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 15+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Bright surfaces, such as sand, water, and snow, will increase UV exposure.
8 to 10 Red "Very high" A UV index reading of 8 to 10 means very high risk of harm from unprotected sun exposure. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Minimize sun exposure between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 15+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Bright surfaces, such as sand, water, and snow, will increase UV exposure.
11+ Violet "Extreme" A UV index reading of 11 or more means extreme risk of harm from unprotected sun exposure. Take all precautions because unprotected skin and eyes can burn in minutes. Try to avoid sun exposure between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 15+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Bright surfaces, such as sand, water, and snow, will increase UV exposure.
[表1 紫外线指数(UV index)]

 

有机材料制成的发光层是OLED显示器发光的关键,但是高强度的UV能量会破坏有机发光层的结构,在这种情况下会影响发光效率,OLED显示器的亮度会下降。为了保护有机材料免受紫外线的伤害,必须尽量减少紫外线波长范围的强度,同时保留可见光范围(400nm~700nm)的强度,采用偏光片是非常有效的解决方案。如图2所示。

[Figure.2 transmission spectrum of polarizer]

[图2 偏光片之穿透光谱分布]

 

为了证明偏光片对紫外线的防护能力,我们设计了一个实验,使用偏光片覆盖OLED面板的一半区域,另一半区域无任何覆盖。 然后将OLED面板放入UV照射腔体,经过UV照射后测量OLED显示屏两个区域的亮度,即可得到OLED面板在UV曝光下的亮度衰减率数据。根据实验结果,如图3所示。蓝线曲线是偏光片覆盖的区域之OLED光亮度衰减曲线,在承受相当于1 UVI强度的能量照射450小时后,亮度衰减了0.76%;红线曲线是没有任何偏光片覆盖的区域之OLED光亮度衰减曲线,在相同的UV照射时间下,亮度衰减了4.97%。此结果说明有偏光片保护时,可以推迟OLED面板在UV曝光下亮度衰减的效果。

Figure.3 The curve of OLED brightness decay with (blue line) and without (red line) polarizer covered

[图3 有含(蓝线)及不含(红线)偏光片覆盖之OLED光亮度衰减曲线]

 

综上所述,OLED模块加上偏光片可有效抵抗紫外线的影响 , 建议有机会照射到阳光的产品应用都要加上偏光片保护OLED面板 , 一般手持式产品加上偏光片在户外使用是没有问题的 , 而户外定点装置则是建议除了偏光片外还要加上遮蔽物避免阳光长期直射以延长使用寿命。Winstar的OLED模块经过多年的产品研发及生产技术精进在适当的使用条件下,成为长效型OLED模块最佳显示器,是客户采用OLED时的最佳选择。

前往 OLED 技术专区介绍

 

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