Home projection resolution selection? It is really different from LCD TV

Faced with the popularity of home projection, many new players will find a problem: home projection is still the majority of 720p and 1080p products, which is a sharp difference from the 4K ratio of LCD TVs. They are all home display products. Why are the resolution indicators of projectors and color TVs completely different? Is there any secret of "unknown"?

The resolution of the projector is "long" and the LCD TV is very different.

For the secret of the projector resolution, the author first wants to introduce from the microstructure - that is, to explain the difference between the resolution of the projector and the color TV at a single pixel.

For display devices, resolution refers to the number of "physical structures" that have the smallest, full-color space on the visual screen. This structure is called a pixel point. However, a complete color space must be presented in three primary colors of “red, green and blue”. This makes the pixel point contain three sub-pixel structures of "red, green and blue".

The sub-pixel structure of LCD TVs, plasma TVs, OLED TVs and CRT TVs adopts a planar arrangement. That is, each point of red, green and blue occupies an independent spatial position. However, the sub-pixels of the projector products use the "overlapping" approach: whether it is a 3LCD projector, a DLP projector or a 3LCOS projector, their three sub-pixels do not occupy space on the screen, but Superimposed together. The intuitive feeling is that when viewing the display screen at the closest distance, the consumer will not see the "red, green and blue" independent color particles on the projector screen.

The pixel configuration of the projector produces two significant display advantages: 1. The smallest display unit on the actual display screen of the projector, that is, the number of sub-pixels is only one-third of that of the LCD color TV, which is beneficial to the overall display. Reduces graininess and eliminates pixel dispersion at the edges of diagonal lines. Especially on large screens, when the pixel size is larger, this benefit directly leads to a higher "visual clarity effect".

2. Since the display technology such as liquid crystal color TV adopts a planar sub-pixel arrangement. This makes it necessary to separate the sub-pixels from the extra physical structure - that is, the "border" of more sub-pixel particles. This makes the display "opening rate" of the LCD TV significantly smaller than any projector technology: not to mention the aperture ratio of the DLP light valve above 90%, the panel aperture ratio of the liquid crystal color TV is much smaller than that of the liquid crystal projector. The lack of aperture ratio specifications, or the more "thick" physical structure between the display's smallest display units, will make the overall picture less consistent and grainy - in large size displays, Changes will also be particularly clear.

Therefore, for the projector, because the pixel structure is quite different from that of the liquid crystal color TV, resulting in the same pixel density (resolution) and picture size, the projector's picture quality is clear and smooth. At present, LCD TVs, such as 55-inch products, are widely popularized in 4K in order to compensate for the "additional image quality caused by structural features such as large aperture ratio and sub-pixels" with higher resolution.

The "visual effect" of the projector resolution is quite different from that of the LCD TV.

In addition to the microscopic structure of a single pixel, the resolution of the projector and the LCD TV are significantly different; in the macro application effect, the resolution concept of the projector and the liquid crystal color TV is also "significantly different."

Why do display devices pursue high resolution? Many people think that it is to reflect the "details of detail." This answer cannot be said to be wrong, but it is really inaccurate. If you simply pursue the details of the details, display the content, using a lot of "close-up" lens is not the easiest, most convenient, the best way! - The true meaning and purpose of resolution is to "increasing the amount of information carried by the display": that is, higher resolution means more information per "frame per frame".

However, from the perspective of human visual processes, the brain's ability to recognize the amount of information per unit time and total field of view is very limited. In natural life, human beings, through observation and grasping more information, often need “the process of repeated observation, comparison and discovery for a long time”. In the application process of the display device, there is also the same rule - just for home entertainment, people will not easily "long time to repeatedly observe, compare, and discover" all the details of each picture: for once Sexuality, one-off observation, human visual cognition, more inclined to grasp the "key information" in the logical relationship before and after.

Therefore, in the academic framework of display cognition, it is generally believed that the resolution of the device is improved, and the effect on the "sharpness" effect of actual vision and brain perception is not linear, but with higher resolution, experience. The increase in the effect is less and less significant. - This is why consumers feel that the 4x resolution change from SD to Full HD is a world of difference, and the 4x resolution change from Full HD to 4K, the picture quality is limited.

This principle determines that "people don't always get a clearer sense of experience from higher resolutions" (taking into account the cognitive laws and abilities of the brain), especially for projections, which is magnified.

The biggest difference between the projector display and the color TV product is that the projector is displayed in the "standard application mode" on the large screen. In a larger picture (at least 4 times the area of ​​the color TV product), the entire display area is greatly increased, and the human eye needs more concentration to obtain the "key information" of different parts of the entire picture, thus in the finer details. The level leads to a decrease in the "resolution" of the "brain response layer." This is why the cinema's giant screen 2K picture, many times the difference between the clarity and the 4K LCD TV is not a big reason - and their pixel size difference, resolution density index is 10 times, even dozens Double.

It is precisely because the core meaning of higher resolution is to provide more information carrying capacity, and the human visual process is very clear on the bottleneck of information processing, so the "larger picture requires higher resolution" This is not an "absolute" truth. The big screen of the digital cinema is the best proof - if the screen is doubled, the amount of pixels has to be doubled, then the 10-20 meter giant screen, what high-resolution device should it use? (In practical applications, movie viewers don't feel how inadequate the existing 2K and 4K resolution giant screens are!)

The large picture features of the home projection display make the resolution requirements of the projector must be considered in conjunction with the impact of the large picture on the visual cognition process. Especially in the space where the viewing distance of the home application is only 2.5-3.5 meters, the large screen completely covers the entire field of view, which is equivalent to 3-5 times magnification of the details of the picture, and completely covers the visual analysis part of the cerebral cortex. Allowing the brain to increase the amount of detail in the picture, resulting in "2K resolution" from a 40-inch LCD color TV to a 100-inch projector, the clarity of the picture feels intuitively "not because the picture is larger, loss of clarity; Instead, I feel that the picture is clearer and more shocking, and I know more about the details I get when I appreciate it."

Under the "over-technology", the projection purchase is more about "comprehensive effect"

It is true that many consumers are currently advocates of the 4K standard, which is in line with the trend of continuous advancement of display technology products - projector products are constantly implementing "more economical and useful" 4K products.

However, on the other hand, 4K video content is still widely lacking. There are no TV channels with pure 4K content in China, let alone 8K video content. Although 4K and HDR have become the broadcast gold standard in this World Cup, more TV stations broadcast HD and SD signals instead of 4K signals. In the civilian display market, the new generation standard represented by 4K has been considered to have the characteristics of “over-technology”, which leads to the popularity of 4K in LCD TVs in the entire industry chain – because of the large-size LCD panel manufacturing, 2K and 4K. The cost is almost equal: of course, the higher the technical indicators, the better.

However, for projector purchases, the price difference between 720p, 1080p, and 4K is very obvious: whether it is micro-projection, Home Theater Projector, or laser TV, the increase in resolution means a significant increase in price costs. Especially considering that the projector has such "special specialities" as mentioned above in the resolution, whether it is worth buying a 4K product with high price is a problem that needs consumers to be cautious.

From the market statistics in 2017, nearly 60% of Home Projector users choose 720P micro-injection products. The sales of genuine 4K products are only 1% of the market. This is even more proved by the "eyes of the masses". 720P, 1080P resolution projectors are sufficient, useful and easy to use. Under the special resolution technology of the projector, the 1080p projection 100-inch giant screen can bring more comprehensive indicators such as visual shock, clarity and playability than the "55-inch 4K LCD TV". Using the resolution index of the LCD TV to prove that the "resolution is not used" of the projector product is untenable.

Choose a few tips for resolution, these knowledge points can not be less

After talking about the particularity of the resolution of the projector and the difference with the LCD TV, the author also wants to add a few special resolution concepts: to make everyone's choice of resolution more "handy".

The first one is the same resolution, different pixel structure. For example, LCD TV's 4K has RGB 4K products, as well as four-color 4K products. The price of the latter is obviously cheaper, but the information carrying capacity per unit area is also lower. There are different resolution implementations on the projector products. For example, 4K products have native 4K resolution and jitter 4K resolution. Although the effects of the two are equivalent in theory, the actual products are subject to engineering constraints. Better than jitter" is the consensus in the industry. At the same time, there are native resolutions, as well as different pixel shapes - such as the difference between diamonds and rectangles. The comparison between the two shows that the display advantages of rectangular pixels are also clear.

The second is to display the "compatible resolution" beyond the physical resolution of the device - that is, the level of resolution that the device can input. At present, LCD TVs are mostly compatible with 4K resolution (different products have different speeds at different refresh rates); projector products do not necessarily support input of 4K resolution content. For consumers, the higher the compatibility index, the better. Especially for 4K resolution signals, the industry is showing more and more trends - if the device does not support this signal, it may be necessary to additionally include a "player" product for signal specification conversion.

"Resolution" is the "application index" at the core of the display device. It is a more complex and definitely worthy of attention. This is the case with color TVs, as well as home projectors, micro-projections, laser TVs, and cinema projections. Buying an ideal home large-screen device is inseparable from the scientific understanding of resolution.

Portable Projector With Battery

The so-called Portable Projector, also known as pocket projector, mainly through the 3M LCOS RGB three-color projector and decoding technology, the traditional huge projector is refined and portable, making the projection technology closer to life and entertainment. A portable projector with a battery is a projector that does not need to be charged.
The most prominent advantage of a portable projector with a battery is that it can be used directly without being connected to a power source. You can take it to play or travel outdoors. It is very convenient. As long as you charge it well before going out, it will take time to watch a movie. There is absolutely no problem.

If you are traveling for business or personal use, you can indeed try a portable projector with a battery, it will make your life more convenient and better.

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