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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting

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Dec 8 3:59 PM EST

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To: Art Bechhoefer who wrote (54995)	9/4/2006 7:37:31 PM
From: slacker711	Read Replies (2) of 196863

The information I have researched over the past few years suggests that OLED has a problem related to changes in color balance over the rather short life of these displays. snip..... From the lay person's point of view (minimum knowledge of the engineering problems affecting OLED and Iridigm), it appears that Iridigm is, theoretically at least, the preferred technology. You are absolutely right that OLED's have an issue related to color lifetimes (specifically the color blue).....however, this is a practical issue, not a theoretical one. The manufacturers of OLED materials continue to make progress on creating a blue material with the necessary lifetimes. In the meantime, they are able to substitute a different blue material to create small OLED displays which can be used in the handset industry....though they sacrifice some efficiency due to the substitution. I think that iMoD displays do have some theoretical advantages over OLED's. They are able to display an "always on" image with a near zero power draw and they can maintain their viewability in sunlit conditions. I had thought that they might also have smaller power consumption while showing video, but I havent been able to find any numbers to back that up. They are also supposed to allow for thinner displays than TFT-LCD's but I dont know if they will be thinner than OLED's since most applications are going to require a frontlight for dimly lit situations. One big advantage that iMoD's may have over OLED's is that they are supposed to be able to reuse a significant amount of the LCD manufacturing infrastructure. Hopefully, that will translate into higher yields and fewer ramp up issues when they do go into production. These seem to be the primary issues that OLED's are dealing with right now. The datapoints are decidedly mixed on the manufacturability of OLED's right now since AUO is pulling back even while Samsung SDI is spending huge sums to ramp up. We'll know considerably more about the respective positions of the two technologies when we start to hear some feedback from SDI's efforts. FWIW, here is a white paper on iMoD displays from Qualcomm comparing some of the advantages and disadvantages of each technology. qualcomm.com And here is a QMT brochure talking about iMoD displays.... qualcomm.com Slacker

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