Recently, smart micro-investments suddenly became hot, and various products of various brands were crowdfunded. As the most central part of the projection, display technology is undoubtedly the most concern for everyone. In the current projection market, LCD technology, in addition to Epson and other brands still insisted, DLP technology almost monopolize the market.
At present, smart micro projectors are mainly based on 0.45 DMD, while some new portable micro projectors use 0.3 TRP DMD. At this time, some technical powders began to have some controversy on the arrangement of DMD: 0.45 DMD is an interpolated product, and the actual effect is far less than the rectangular arrangement. .
Before we talk about this topic, let's take a look at how DMD works:
The above content is from Baidu Encyclopedia. It can be seen that the DMD is an array of mirrors. The reflection of images is used to achieve image display. The conventional situation should be a one-to-one rectangular structure. In order to achieve the goal of increasing the resolution and reducing the system cost, Texas The instrument company has developed an innovative DMD. This new DMD uses a biased diamond pixel arrangement. The fine mirror is rotated 45 degrees with respect to the right-angle DMD, and 1080P resolution can be achieved in the space of 720P. This saves the cost and improves the image vertical. And horizontal resolution. This is where everyone is now entangled, but with the development of technology, the arrangement of diamonds has also changed, the following will take a look at the official information of TI.
It can be seen that the current 0.45 DMD technology is not 640400 but 9121140.
In the arrangement form, it can be seen that although the 0.45 DMD is still arranged in a diamond shape, the pixel density has been greatly improved.
However, with the development of technology, TI introduced the latest TRP technology 0.3 DMD, using a standard rectangular arrangement. Provides a standard pixel arrangement in a smaller space.
If so, the problem comes. For the same 720p resolution, we choose a large-sized but diamond-shaped DMD or a small-size but standard-aligned DMD product. .
There are just two such products, one is the use of the current micro-cast mainstream 0.45DMD products, one is the use of the latest TRP 0.3DMD portable micro-projection. We do not consider the brightness of the two conditions, nor do they consider the difference in color (because the laptop is inherently weak in brightness, and the color adjustment levels and styles of different manufacturers are also different). We only pay attention to the details of the lower screen and Text display effect. (left 0.45 right 0.3)
Let's take a look at the details.
It can be seen that the details of 0.45 will be more, and the smear of 0.3 will be more serious.
Let's look at the edges of the picture.
It can be seen that the rectangular arrangement of the edges is indeed a smoother point. .
At the end of the text, the congenital advantages of the rectangle are displayed, and the fonts are delicately smoothed.
In summary, in fact, the DMD is somewhat similar to the camera's photoreceptor, of course, the bigger the better, it is like the mobile phone pixel is no higher than the 800W SLR, in the details and latitude, large size has inherent advantages. However, the arrangement form has a great influence on the display of the screen edges and text. In the current conditions, 0.45DMD is still the first choice for purchase, of course, the rich 0.65DMD is better, LG's PF 80 effect is quite good, has not lost a lot of traditional light bulbs. The next step in the micro-projection is TI's latest 0.47 1080P DMD light machine as soon as possible, which meets the requirements of the big bottom, rectangular full HD resolution will also bring better detail performance.
