OLED Module technology and development with echoes, OLED drive also plays an increasingly important role. Not only from the low duty cycle increases to support high duty cycle, and the application of such a control current for each RGB, wider IC operating temperature (-45 to 80 ℃), the internal DC-DC boost, as well as graphics acceleration instruction and some other features.
2013年6月3日星期一
Wavelet image coding research expansion Character LCD Modules
Because the wavelet transform multi-resolution characteristics, it has been successfully applied to image coding. However, the general wavelet image coding still has some shortcomings and limitations characteristics, so that people continue to study a new method of wavelet image coding. graphic lcd display module
① multi-wavelet transform multi-wavelet is a single wavelet promotion, ordinary single wavelet can not simultaneously have a symmetrical, orthogonal, limited support and other properties; while Multiwavelets relaxed restrictions on single wavelet function, you can also have these features, it Image compression will have broad application prospects.
② wavelet packet image coding for the signal wavelet packet analysis can provide a more detailed analysis method, it will be a multi-level division of the band, no breakdown of the multi-resolution analysis of high-frequency part of the further decomposition, and can be analyzed according to the signal characteristics, adaptive selection of respective frequency bands, the frequency spectrum of the signal to match, thereby increasing the time - frequency resolution.
③ second generation wavelet transform in 1994, proposed a Fourier transform does not depend on a new method to enhance the wavelet construction method, known as the second generation wavelet transform. Its characteristics are inherited first generation wavelet multi-resolution characteristics; does not depend Fourier transform; wavelet transform coefficients are integers; image restoration quality and transform boundary extension in what way has nothing to do. Because it can achieve image integer to integer transform, thus giving lossless image compression provides a theoretical basis. custom lcd module
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