外文資料翻譯--有關(guān)led顯示屏設(shè)計(jì)時(shí)的參考-其他專(zhuān)業(yè)-資料下載頁(yè)
2025-01-19 10:25本頁(yè)面
【導(dǎo)讀】顯示器的總體尺寸在畫(huà)面質(zhì)量和均勻性方面的標(biāo)準(zhǔn)、要求。LED是英文lightemittingdiode的縮寫(xiě)，它的基。樹(shù)脂密封，即固體封裝，所以能起到保護(hù)內(nèi)部芯線的作用，所以LED的抗震性能好。進(jìn)，全彩色LED顯示屏已經(jīng)使用了很多年，但這還沒(méi)達(dá)到顯示的極限。它也將顯示出市場(chǎng)的思考，保持平衡的最佳成本效益和產(chǎn)品。生命周期的預(yù)期。LED光源由于具有使用壽命長(zhǎng)、光效高、節(jié)能、無(wú)頻閃等優(yōu)點(diǎn)，LED驅(qū)動(dòng)電源的可靠性問(wèn)題是影響LED照明系。統(tǒng)照明品質(zhì)和使用壽命的關(guān)鍵因素。提高LED驅(qū)動(dòng)電源的效率和進(jìn)行變換器的熱分。這兩個(gè)極端之間。通常是LED恒流驅(qū)動(dòng)的水平在10或~20mA時(shí)。LED驅(qū)動(dòng)電流也是至關(guān)重要的，在這一點(diǎn)上。行業(yè)標(biāo)準(zhǔn)是8、16或24的輸出。熱的產(chǎn)生不僅僅體現(xiàn)在設(shè)計(jì)上，同時(shí)也對(duì)LED的光輸出產(chǎn)生了一。LED需要補(bǔ)償，恒流驅(qū)動(dòng)的變化也需要得到一定補(bǔ)償才能保證系統(tǒng)得到最好的運(yùn)行。的熱量，因此選擇適當(dāng)?shù)腖ED驅(qū)動(dòng)電壓優(yōu)化開(kāi)關(guān)電源的輸出電壓是很重要的。圖1顯示了在處理路徑上的實(shí)現(xiàn)方案。
【正文】 better processing algorithms are developed, these can easily be upgraded in the field, so that the display will continue to perform to the latest innovation and image display capabilities. Figure 1shows an implementation proposal on the processing path. Without showing the detail of plexity on the individual brightness control of every LED and the fast processor interface for updating the parameters in real time. The top path is the main red processing part, the middle one is the main green path, and the bottom one is the blue core processing. As one can see, each path has its scaler incorporated. Usually LED displays are built modularly, which in fact means that such a selfcontained module has only a fraction of LEDs to account for. Thus, the plexity goes down per system, but performance goes up. Since such a module only needs to display a fraction of the total picture, the processing time allocated for one pixel is magnitudes higher than in the case of a full display. This also means that for instance scaling algorithms can be implemented on a module level, which are not monly used in the industry because the processing power needed on a full display level would require cost prohibitive electronics. Now, due to the modular system, since a module only has a ‘‘few’’ pixels to take care of, the processing time per pixel is much higher, so the time spent on optimizing and using extreme performing algorithms is possible. Obviously, the amount of color addition must be in the range of the color correction needed, but is usually a 100–1,000 times less than the main color. The consequence is in this case that the bit depth calculation and LED light output regulations, must be even 10–100 times more, to also acmodate a color correction scale. Thus, calculating back the numbers, this would yield a processing path in the range of 12–16 bits, with intermediate calculations even at a higher level in order not to accumulate rounding errors at the end stage. Fig. 1 Core processing paths for large area modular displays, showing the separate paths for red (top), green (middle) and blue (bottom) 6 Summary This chapter provides an overview of some important topics regarding LED processing for largearea modular display implementation. One needs to take into account a wide range of visual and electronics parameters, which are not that obvious in the standard display industry. On top of that, the economics, manufacturability, and requirements here are much more involved and are indeed important pieces of the puzzle. The intention of this chapter is to make designers, consultants, and customers aware of most important pieces of the puzzle, and hopefully allow the right questions to be considered. Reference 1. Nakamura S (1994) Nichia 1cd blue LED paves way for full colour display. Nikkei Electron Asia 6:65–69 2. Wyszecki G, Stiles WS (1967) Color science. Concept, methods, quantitative data and formulae. Wiley, Oxford 3. 4. Chen KY, Chen SM, Hao ZD (1998) Optical illumination system having improved efficiency and uniformity and projection instrument prising such a system. US Patent 5,755,503, 26 May 1998 5. Reference to multiple LED datasheets. 6. 7. Schwedler W, Nguyen F (2021) Invited paper: LED backlighting for LCD TVs. SID Symposium Digest of Technical Papers 41(1):1091–1096
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