教學(xué)幼兒觸摸一體機(jī)(編輯修改稿)
2024-10-25 09:03 本頁面
【文章內(nèi)容簡介】 body That pitiful eyes is like saying, “take me away”But Shen Ming didn39。t move, like mechanical like sitting there, he is the bodyguard, not a servant, not for employers decide how to take the road If the dream i really want to leave, even a powerful army to stop, Shen Ming will God blocks deicide, kill the Buddha Buddha block。but if she just needs someone to escape from her courage Do not Shen Ming to“Then I change a problem now, you love him?” Stewed fish again hair strokes“I don39。t know if that love, I just want to say, a thing of the past just let it in the past well, like you said, who had made no young, miss? Let39。s talk about something else?” Meng i39。s voice was shaking, but still dedicated efforts will change the subject “I know, this problem may hurt you, but love your fans have a right to know the truth, so a mysterious guests today we have invited the actorMr Liang Jun” Stewed fish amplification stunt roadA simple leisure suit Liang Jun walked out from backstage, the Oriental man most affectionate smile hanging on his face, even the eyes of the crow39。s feet can acting actor Liang Junyi appearance, immediately attracted the audience cheersThis year has been 44 year old he is China actor in the top stars, has appeared in several art movie won international awards, this let his height only 170, but captured under 18 years old to 80 years old many female fans, known as “l(fā)over of the public”See it for the first time in 2 years a lot of men, Mengi spot couldn39。t control her hands over her mouth to cry I do not know what cheating sound engineer was put up “boast swims on the west” the piece postlude “l(fā)ove life”第三篇：觸摸一體機(jī)液晶與等離子觸摸一體機(jī)優(yōu)劣觸摸一體機(jī)在教育市場上方興未艾，各路諸侯已在這片沃土上勵兵秣馬，隨時準(zhǔn)備放手一搏。等離子和液晶(LCD/LED)是目前主要電教觸摸類產(chǎn)品，由于其顯示部分的使用材料和工作原理各不相同，倆者之間難免會有一場生死決戰(zhàn)。今天筆者帶著客觀的態(tài)度，與各位共同探討等離子與液晶的優(yōu)劣。工作原理對比：各有所長液晶和等離子的諸多差別，根本上說是由于其工作原理的差別造成的。液晶觸摸產(chǎn)品是利用給液晶充電會改變它的分子排列，在不同電流電場作用下，液晶分子會做規(guī)則旋轉(zhuǎn)90度排列，產(chǎn)生透光度差別的原理。在兩片玻璃基板上裝有配向膜，所以液晶會沿者溝槽配向，由于玻璃基板配向膜溝槽偏離90度，所以液晶分子成為扭轉(zhuǎn)型，當(dāng)玻璃基板沒有加入電場時，光線透過偏光板跟著液晶做90度扭轉(zhuǎn)，通過下方偏光板，液晶面板顯示白色。當(dāng)玻璃基板加入電場時，液晶分子產(chǎn)生配列變化，光線通過液晶分子空隙維持原方向，被下方偏光板遮蔽，光線被吸收無法透出，液晶面板顯示黑色。液晶電視便是根據(jù)此電壓的變化，使面板達(dá)到顯示效果。形象點(diǎn)說，就好比是一個個小窗戶，液晶分子就是一扇扇小窗扇，通過窗花的開關(guān)或開口的大小顯示圖像，而光源來自背面的燈管。而等離子的發(fā)光原理和日光燈一樣，是在真空玻璃即放電空間中注入惰性氣體或水銀氣體，然后再利用施加電壓的方式，使管內(nèi)的氣體產(chǎn)生放電，即等離子效應(yīng)而釋放出紫外線光，照射涂布在玻璃管管壁上的熒光粉，熒光粉就會被激發(fā)出可見光。只要涂布不同的熒光粉，就會激發(fā)出不同顏色的光。等離子屏幕上的每一個像素，相當(dāng)于一個小燈管。但值得注意的是，等離子產(chǎn)品發(fā)射的是紫外線，遠(yuǎn)觀尚且有害，若近身操作，難免會對人體產(chǎn)生光輻射，造成細(xì)胞衰死，破壞表皮組織、加速皮膚老化。所以，這也算是等離子用于近身觸摸操作中的一大先天不足，這是技術(shù)沒法改變的。而液晶則沒有這方面的擔(dān)憂。分辨率PK：等離子要略遜液晶一疇無論什么材質(zhì)的顯示器材，清晰度無疑是最重要的。對于平板顯示器，考察清晰度的高低，就看分辨率的大小。一個很有趣的事情是，對于液晶顯示器而言，26英寸的分辨率即可達(dá)到1366768，而42英寸的等離子只有853480的水平，最高的也只有10241024，不但和1366768的像素數(shù)量相差很大，而且像素形狀還是扁的，顯示圖像的時候，還不得不采用隔行顯示的方式。如果等離子要做到1
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