OLED，即有機(jī)發(fā)光二極管（Organic Light-Emitting Diode），由于同時具備自發(fā)光，不需背光源、對比度高、厚度薄、視角廣、反應(yīng)速度快、可用于撓曲性面板、使用溫度范圍廣、構(gòu)造及制程較簡單等優(yōu)異之特性，被認(rèn)為是下一代的平面顯示器新興應(yīng)用技術(shù)。其根據(jù)驅(qū)動方式的不同分為主動式OLED（AMOLED）和被動式OLED（PMOLED）。近年來，OLED因其優(yōu)勢在各領(lǐng)域有了突破性發(fā)展，并廣泛應(yīng)用于MP3顯示，在照明領(lǐng)域也有可觀的前景。許多公司也于展覽會、期刊等展示了OLED的各種先進(jìn)產(chǎn)品。本文將討論各種OLED技術(shù)和適當(dāng)?shù)钠珘弘娫垂?yīng)電路，而關(guān)于OLED技術(shù)和驅(qū)動方法的選擇，也會影響電源供應(yīng)電路的需求。并應(yīng)用單片機(jī)驅(qū)動OLED顯示相應(yīng)文字圖案。
標(biāo)簽： 0.96寸OLED并口驅(qū)動顯示
上傳時間： 2015-06-08
上傳用戶：linglanhua
MathType是我一直在用的公式編輯器。最近這些天寫論文的過程中用它來輸入了不少的公式，很是方便，與Microsoft Office結(jié)合緊密、調(diào)用方便，比Office本身的編輯器不知強(qiáng)大了多少，可以入各種復(fù)雜的數(shù)學(xué)公式和符號！ 由于看到網(wǎng)上的一些綠色版不甚完美，就自己動手做了一個綠色版，本來是自己用的，想想還是發(fā)出來吧，有需要的就下載試試吧！ 這個綠色版的特點(diǎn)： * 中文界面、方便使用(插件部分未漢化)； * 修正了其他綠色版中每次啟動時提示 MT Extra 字體未安裝的問題； * 完善支持 Office 2003 與 Office 2007 插件，能在Office3個組件(Word、PowerPoint、Excel)中方便調(diào)用； * 在 Office 2007 中請通過 "插入"--"對象"，并選擇 "MathType 6.0 Equation" 來輸入公式，這個方法在 Office 2003 中也可用，只是2003中可以更方便插入公式； * 卸載徹底、不留痕跡、這樣是我做綠色軟件的重要原則； * 自詡為完美綠色版，其實(shí)是 "不懈努力、追求完美"，有問題的還不吝反饋。
上傳時間： 2015-12-02
上傳用戶：TANGhongde76
The AP2406 is a 1.5Mhz constant frequency, slope compensated current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell lithium-Ion (Li+) battery. The AP2406 can supply 600mA of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The AP2406 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. Idle mode operation at light loads provides very low output ripple voltage for noise sensitive applications. The AP2406 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version and fixed output voltage of 1.2V, 1.5V and 1.8V
上傳時間： 2017-02-23
上傳用戶：w124141
I saw the light of the future when I first read Ray Kurzweil’s best-seller book The Singularity Is Near: When Humans Transcend Biology. One cubic inch of nanotube cir- cuitry, once fully developed, would be up to one hundred million times more powerful than the human brain.
標(biāo)簽： Predictive Cognitive Warning System Early The
上傳時間： 2020-05-26
上傳用戶：shancjb
Your Cisco Networking Academy Course Booklet is designed as a study resource you can easily read, high- light, and review on the go, wherever the Internet is not available or practical: ■ The text is extracted directly, word-for-word, from the online course so you can highlight important points and take notes in the “Your Chapter Notes” section. ■ Headings with the exact page correlations provide a quick reference to the online course for your class- room discussions and exam preparation. ■ An icon system directs you to the online curriculum to take full advantage of the images, labs, Packet Tracer activities, and dynamic Flash-based activities embedded within the Networking Academy online course interface.
標(biāo)簽： Switching Wireless LAN and
上傳時間： 2020-05-27
上傳用戶：shancjb
An optical fiber amplifier is a key component for enabling efficient transmission of wavelength-divisionmultiplexed(WDM)signalsoverlongdistances.Eventhough many alternative technologies were available, erbium-doped fiber amplifiers won theraceduringtheearly1990sandbecameastandardcomponentforlong-haulopti- caltelecommunicationssystems.However,owingtotherecentsuccessinproducing low-cost, high-power, semiconductor lasers operating near 1450 nm, the Raman amplifiertechnologyhasalsogainedprominenceinthedeploymentofmodernlight- wavesystems.Moreover,becauseofthepushforintegratedoptoelectroniccircuits, semiconductor optical amplifiers, rare-earth-doped planar waveguide amplifiers, and silicon optical amplifiers are also gaining much interest these days.
標(biāo)簽： Propagation Light Media Gain in
上傳時間： 2020-05-27
上傳用戶：shancjb
One of the prerequisites for the development of telecommunication services is the understanding of the propagation of the waves, either acoustic, electromagnetic, radio or light waves, which are used for the transmission of information. In this work, we shall limit ourselves to the study of radio waves: this term apply to the electromagnetic waves used in radio communications. Their frequency spectrum is very broad, and is divided into the following frequency bands : ELF waves (f < 3 kHz), VLF (3-30 kHz), LF waves (30-300 kHz), MF waves (300-3000 kHz), HF (3-30 MHz), VHF waves (30-300 MHz), UHF waves (300-3000 MHz), SHF waves (3-30 GHz), EHF waves (30-300 GHz) and sub- EHF waves (300-3000 GHz).
標(biāo)簽： Propagation Radio Wave
上傳時間： 2020-06-01
上傳用戶：shancjb
Before I can present design concepts or tactical wireless communications and network challenges, I feel the need to mention the challenges of writing for a field where some information is not available for public domain and cannot be included in this book’s context. Another challenge is the use of military jargon and the extensive number of abbreviations (and abbreviations of abbreviations!) in the field. Engineering books are naturally dry, and I have attempted to make it light by presenting the concepts in layman’s terms before diving into the technical details. I am structuring this book in such a way as to make it useful for a specialized graduate course in tactical communications and networking, or as a reference book in the field.
標(biāo)簽： Communications Tactical Networks Wireless and
上傳時間： 2020-06-01
上傳用戶：shancjb
Long-TermEvolution(LTE)isarguablyoneofthemostimportantstepsinthecurrentphaseof the development of modern mobile communications. It provides a suitable base for enhanced services due to increased data throughput and lower latency figures, and also gives extra impetus to the modernization of telecom architectures. The decision to leave the circuit- switched domainoutofthescope ofLTE/SAEsystem standardization might soundradical but itindicatesthatthetelecomworldisgoingstronglyfortheall-IPconcept----andthedeployment of LTE/SAE is concrete evidence of this global trend.
標(biāo)簽： Deployment Handbook LTE-SAE The
上傳時間： 2020-06-01
上傳用戶：shancjb
The use of light to send messages is not new. Fires were used for signaling in biblical times, smoke signals have been used for thousands of years and flashing lights have been used to communicate between warships at sea since the days of Lord Nelson. The idea of using glass fibre to carry an optical communications signal originated with Alexander Graham Bell. However this idea had to wait some 80 years for better glasses and low-cost electronics for it to become useful in practical situations.
標(biāo)簽： Communications Understanding Optical
上傳時間： 2020-06-01
上傳用戶：shancjb
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