Color Comparison Between E Ink's Spectra 6 and ChLCD

Summary

Full-color, crisp, vivid images have become essential across all visual applications, while energy conservation and carbon reduction are now global trends. Through a series of image tests, we will delve into the characteristics of Spectra 6 and ChLCD e-paper technologies, helping readers understand their strengths and weaknesses and choose the most suitable color e-paper for their applications.How Spectra 6 works?Spectra 6 features E Ink's ACeP (Advanced Color ePaper) technology, which consists of microcups filled with four ink particles: red, blue, yellow, and white. By applying different voltages, these ink particles can be shifted to generate six standard colors: black, white, red, yellow, blue, green.Spectra 6 contains micro cups of red, blue, yellow, and white ink.When the electronic paper display needs to present colors beyond the six specified, it requires precise blending of these six colors to simulate similar hues when viewed from a distance.Cholesteric liquid crystal (ChLCD) e-paper has three layers of displays that reflect red, green, and blue respectively. The electric field alters the rotation of the liquid crystals that is bistable between the two states:The planar state has the liquid crystal particles lined up uniformly to reflect specific wavelengths of light, to form unique colors.The focal conic state lines up the liquid crystal particles in a way to let light pass through, displaying the colors underneath.Altering the ChLCD particles on different layers to fully reflect light (white), partial reflection (gray), or no reflection (black).By independently adjusting the states of the three RGB liquid crystal layers, ChLCD can perfectly reproduce more than 16 million colors, creating a rich color image comparable to LCD.Differences in color palettesUsing this comprehensive color palette as an example, Spectra 6 exhibits high saturation in yellow but shows gaps in green tones with poor magenta and cyan. In contrast, ChLCD offers a more comprehensive c...