The camera resolution suddenly increased.There is only expectation for quantum dot sensor technology (Giz Mode Japan)

The camera resolution suddenly increased.I have no choice but to expect quantum dot sensor technology

The possibility of quantum dots, not just TV.The quantum dots have been attracting attention for decades at the research level because they increase the color reproduction of the display panel and the power efficiency of the display panel, and TVs that use it have been used as a product for several years.According to a research team at Chun An university in Korea, quantum dots are likely to help digital photography.A quantum dot is a very small semiconductor nano crystal, which emits a specific color when activated with light, and can express brighter, vivid, accurate and natural colors than before.Recently, the combination of quantum dots and organic EL technology has realized a display with high energy efficiency while expressing bright, vivid colors and deep black.There is also a feeling that TV makers have been too fueled by quantum dots in CES and other places, but considering that the potential of this technology and the new usage are always being explored, it is inevitable.

4 times resolution by overlapping quantum dots

The advantages of using the quantum dots for the camera are listed, such as high color reproducibility, ease of manufacturing, and thinness when imaging sensors, but in this study, quantum dots are overlapped.This has created a method to increase the density of pixels.The number of pixels of the digital camera is now commonplace, and is it necessary to pack more pixels?You might think that.However, for example, it is very meaningful to evolve technologies different from conventional image sensors, as the use of cameras is expanding, such as sensors for detecting surrounding conditions.If you look at the CMOS sensor used for general digital cameras with a microscope, you can see the color filter on the grid -shaped photo diode, which captures color information.But each photo diode receives only one color information.So, in order to capture full -color information, you need four squares, two greens + red and one blue to make one pixel.So, if the four squares are captured four colors alone, the density of the sensor will be 4 times, that is, the resolution will be four times the resolution.So the quantum dots are useful.According to a paper from a research team at Central University in Korea, published in the recent academic magazine "Advanced Materials", they will only respond to specific colors by making quantum dots in special size and configuration.I made it possible to customize.As a result, quantum dots can be functioned like the image sensor photo diode, and the color filter is unnecessary.In addition, quantum dots created to react to red, blue, and green light can be overlapped, and photons that are not absorbed in the upper layer are transmitted to the lower layer, so even at the bottom layer.It is a mechanism that can function effectively like the layer of.