First of all, thank Lei Feng for the experience opportunity. I want to experience trendy toys for free and come to Lei Feng Love to play computer games Public beta!

The projection of the led light source can actually be traced back to Casio's led projection at CES in Las Vegas many years ago. Of course, the new light source really caused a strong response in the video circle. At that time, Casio was aware of the brightness problem of the led light source, and adopted the ultra short focus projection scheme. It was clear that the domestic ultra short focus led micro projection was actually the leftover of Casio's game n years ago.

In addition, the reason why Casio's LED projection was not popular in those years was the 800p resolution, the obvious color deviation of the cold light source and other problems, so it was also a flash in the pan.

Next is LG, which can be said to be the first product in the professional audio-visual field to project LED cold light source to make consumers shake their desire to buy, The lumen brightness of 1000ansi can be said to be almost the extreme of the led cold light source at that time. The DMD chip with a resolution of 0.65 "1080p is correct. Compared with the traditional light bulb machine, the 1080p dmd with a resolution of 0.65" is just a change of light source. Although 1000ansi and the high gain screen can also achieve large-scale launch, the price of nearly 10000 yuan, the brightness is not lower, and it is only a choice for the minority, After all, there is still a gap between professional household projection and light bulb machine, but it has been infinitely pulled into the gap.

Then there are the micro investment products of Baihuaqifang in China. 16 years ago, they all used the 0.45 inch launched by ti, The dmd chips with a resolution below 800p give full play to their small size and portability, but most of their brightness is within 500ansi. We can collectively call these products the products of digital enthusiasts, which have nothing to do with professional audiovisual. After all, 4k was already popular at that time, and 800p was already a parameter in the famine era.

In late 2015, TI launched a 0.47-inch 1080p micro DMD chip. In 2016, Jimi was the first domestic manufacturer to launch a 1080p LED micro investment. Of course, previous generations of LG also adopted the latest DMD chip and launched new models.

Of course, the problem of LED projection is still significant. For example, the brightness bottle diameter, such as color deviation, for example, the image quality of the micro dmd is inferior to that of the large DMD, but there is no doubt about its advantages. It is light, long life, and won't explode the light. The TV show no longer cares about the life of the bulb. Next, let's see how the Jimi h1 performs in the place where the LED micro projection board is short.

Jimi H1 adopts black matte packaging, which is very textured, but also not very photogenic. The packaging is marked with Harman Carton, and I vaguely remember that it is not the first micro project of Jimi with Harman built in.

Opening the upper cover is the host of h1. The accessories and the host are not in a stack structure, but in a pull-out accessory bin. All accessories are packed in separate cartons and stamped with the accessory logo. It is very careful.

All accessories include: Jimi h1 host, power cord, power adapter, remote controller, USB charging data cable, one-year mango vip card, instructions, and clip for adjusting zoom lens.

The main body of the polar meter h1 is square, and the punching mesh shell wraps three sides. It is mainly equipped with a Harman unit and supports the use as a Bluetooth audio, so the polar meter h1 has a similar audio appearance.

Jimi h1 adopts a lens cover structure. When the lens cover is opened, it starts up. The lens group has no displacement function, and the zoom range is small, 1.35-1.5. Therefore, the positioning is relatively difficult. Even some environments can only be compromised by trapezoidal correction, and there is no zoom ring structure. It is operated by inserting a pin into the lens edge.

The optical unit shall be made of coated resin, with built-in electric focusing, and the measured output is 150 inches at about 5 meters.

Jimi h1 is a black matte plastic with touch function to realize the experience of living room audio. The black strip is a volume control, with collection, previous, next, play pause and other functions set below. The operation is relatively sensitive.

The upper end of the back is designed in the shape of a heat sink, and the lower end is an interface panel.

The interface part provides aux3.5mm headphone output, power interface, one USB 2.0, one USB 3.0, one optical fiber output, one gigabit network interface, and two hdmi 1.4 interfaces, one of which supports ARC audio return.

The bottom is designed with a heat dissipation grid. It is worth mentioning that the standard 1/4 inch screw hole is not provided for the Jimi, and the upper side is equipped with two passive bass vibrating pots.

However, the four corner floor mats are detachable and support the installation of the separately purchased adapter plate with 1/4-inch screw holes. I don't know whether it is because the internal space is really unable to accommodate this structure or for the supply of accessories in the biological chain.

In order to facilitate installation, a certain treasure purchased a suitable adapter chassis, which has the same structure and installation size as the original factory, but it is not known whether it is genuine, but it has no technical content, so it can be used. The chassis is equipped with a special booster pad to increase the air convection space.

After the adapter plate is installed, a 1/4-inch thread can be installed with a tripod or a special hanger, or placed directly for use.

Because of the single hole fixation, when operating the lens cover, the main body will rotate. It doesn't matter if you cast hundreds of walls, but you need to adjust the angle frequently when casting the screen.

Due to the built-in Android system, the remote control of Jimi is the same as the remote control of set-top box and Internet TV. The workmanship is fairly good. The aluminum alloy profile is used, and the key layout is also reasonable, which is very easy to use.

The remote control is equipped with a Bluetooth paired built-in lithium battery. The lower end is equipped with a reset button, a micro USB charging interface, and fn function switching. After switching, you can fine tune the focus through the volume button to adjust the projection definition. 　

In addition to physical remote control, Jimi h1 supports mobile app operation. By downloading the client app "no screen assistant", you can perform online resource on-demand and remote control.

The external interface is divided into three sections: film and television, music, and application, which can be used for on-demand broadcast of film and television and music resources, especially music resources, providing a more perfect experience for the sound mode of Jimi h1. 　

The remote control mode is divided into treasure box, direction control, touchpad and voice. The treasure box covers practical functions such as focusing, input, screen capture, 3d setting, image mode, stepless zoom, memory cleaning, same screen, connection management, power off options, and even the operation is faster than using physical remote control.

System&UI

The GMUI operating system, which is deeply customized based on Android 5.1, is built in the Kimi h1. The CPU of the Mstar 6A928, the GPU of the Mali-T760, 3G storage, and 16G storage can be said to be flagship configurations.

The UI of the Kimi H1 is horizontally distributed. On the left is the external/internal storage, the source selection of hdmi1/2, the middle is the classification of several functions such as film and television, music, games, and applications, and on the right are the functions and shortcuts such as settings and projection.

In terms of online resources, Mango TV, which is also the most popular online resource provider, will not comment. In any case, there are all new film and television dramas, but the accumulation of resources is not deep. The most advantageous estimate is the variety show.

Baidu Music is used as music resource, which is rich in resources.

The play interface is very rich in information, with synchronized display of lyrics.

Jimi h1 has built-in speech recognition, which seems to use iFLYTEK technology. The processing and range of keywords are almost the same as that of Microwhale TV. It is also an audio-visual device with the highest speech recognition rate and the best experience after Microwhale.

Android platform, rich games and simulators are also indispensable. The big screen player is incomparable to TV. At the beginning, it was through 720p projection that Zhanshen and Shenhai 3 generation masterpieces were connected.

Although the Android platform is used, customization is more in-depth, and the shadow of Android settings can no longer be seen. Several options are provided, including connection settings, sound settings, projection settings, general, user, and about.

It is worth mentioning that the polar meter h1 can give consideration to both projection and sound, so you can select sound mode and sound source priority in sound mode.

Because it is equipped with optical fiber output and hdmi arc audio return, the audio output can be switched in the audio output, but whether hdmi arc can transmit next-generation audio tracks needs to be known in subsequent and professional power amplifier connection tests.

In projection settings, there are many brightness modes. The color accuracy of movie mode is high. Some modes have obvious color deviation. The polar meter h1 also supports forward projection, hanging projection, rear projection modes, and trapezoidal correction.

LAN play test

As a high-definition enthusiast, naturally a loyal user of nas, a black group modified from hp n54l is placed in the cabinet, and more than 10 T resources are hung. The network environment is gigabit LAN+gigabit switch. The polar h1 is also directly connected to the switch through a super five class network cable to ensure transmission bandwidth and stability.

The player adopts the Kodi 17 beta version, and the UI is greatly changed and more intuitive. 　

Simple settings can identify the nfs share in the local area network nas. In this case, the operation and transmission efficiency of nfs share in the local area network multimedia share is much better than that of smb. 　

The source of Avatar 43g remux is played smoothly.

High bit rate god war is also more than enough.

13 hours after the crisis of the atm os audio track, the audio track is displayed as dolby hd. I don't know whether it is reduced to true hd. Later, it is tested through hdmi arc to panoramic sound power amplifier. 　　

The 4k roast duck has no pressure to play, but the display device with a physical resolution of 1080p will not have a qualitative improvement in the picture if it uses a 4k film source. Moreover, the current 4k x265 film source has a volume of more than 100 g, which has less practical significance.

Audio test

The audio of Jimi h1 is divided into local speakers and digital outputs. The local speakers use two 7.5w 1.5 inch Harman Carton full frequency units and two passive vibration basins. The midrange performance is very excellent, so the dialogue performance is very good, which accounts for more than 70% of the films and dramas. However, due to the limited sound pressure and the limitation of positioning, there is a very obvious sense of positioning in the movie, Therefore, it can only be used as a benefit with low requirements for sound effects. If you want to experience immersive sound effects, you need to cooperate with the multi-channel cinema system.

Jimi also supports digital output of hdmi arc and optical fiber. In fact, optical fiber can be eliminated. For now, the home panoramic sound can be surrounded by up to 11 speakers, and the non next-generation audio track of 5.1 can no longer meet the needs of video enthusiasts, so optical fiber can only meet the needs of low-end sound bars and desktop multimedia systems.

On the premise that the audio output is arc and the output format is raw, it is a pity that the arc echo tested only supports the dual channel audio signals of pcm and DOLBY DIGITAL, and does not realize the echo of dts audio tracks, let alone next-generation audio tracks. Of course, it cannot avoid possible setup errors. However, according to the technical information reviewed, ARC feedback supports 5.1 channel information at most, that is, non next generation.

Imaging test

First of all, I will not try to cast 300 inches and turn on the light to test this behavior of hooliganism in the daytime. After using projection for many years, the Shenming projection is a dead light thing. Unless a high gain metal screen or an anti light screen made of other materials is used, but the principle of reducing light reflection loss and improving the brightness of the picture is the same, which will bring about hot spot effect and a narrower perspective, In addition to ensuring the integrity of acoustic reflection, the existence of an independent AV room provides an almost all black environment for projection.

What's the difference between the picture performance of the Jimi and the professional high-voltage bulb machine? Next, use the 3lcos of sony hw55es to compare the dlp of the Jimi h1. To compare the picture difference, divide the 4-yuan color picture left and right, and the Jimi h1 is projected to the left, The hw55es project on the right. In the actual test, because the performance of the black position of Jimi is not outstanding, the black part is still illuminated by a layer of uniform led light source, which affects the contrast and color performance of the right picture. In addition, because of the two pictures, there is no special adjustment of the white balance for a projection. In addition, sony hw55es sold for 18000 yuan at the time of sale, which is still more than 10000 yuan now, So the screen shot is only for reference.

When the white picture is projected, the left side is cold and the right side is warm. This is also the biggest difference between cold light sources and warm light sources. In fact, Asians prefer the professional projection of high-voltage light sources because their eyes prefer warm colors.

(Original picture)

It can be seen from the comparison between the left and right pictures that the red color on the left is slightly purple. Although the color restoration is a little different from the right, the performance is already very good.

(Original picture)

Green shows saturation and low color temperature.

(Original picture)

Yellow shows low saturation and color temperature.

(Original picture)

Blue also appears purple, but within a controllable range.

In general, Jimi is a rare LED projection device in China. The price of nearly 5000 integrates a 1080p physical resolution dmd chip, and the brightness of 900 ansi lumens is no less than the viewing brightness of 1700 ansi bulb machine (I remember an industry person once told me that led The ansi brightness of the light source is relatively higher than that of the high-voltage light source, which is also true in actual measurement). The unit of Harman Carton is an android module with strong performance, and the accuracy of color performance is within the reception range. For a feverish user, Jimi can solve the pain points of some professional cinemas.

1) Bulb life: I think many domestic audio-visual room users use LED projection for a simple reason: bulb life. These users like to play games and play TV series. Calculated by 60 minutes of an episode of American TV series, 600 episodes will make the brightness of the high-voltage light source begin to decline significantly. It is also very common for a host game to take 20-30 hours. After 3-5 games, 100 hours will disappear, Moreover, the color reproduction performance of the screen in the dramas and games is not strict, so the long lamp life of LED projection is definitely one of the advantages.

2) Android online resources, and now sigma chips have begun to support Android. The demand for Android online resources cannot be underestimated. For example, new songs are recorded through Dolby technology, and multi-channel audio tracks are returned through arc to power amplifiers, which can enjoy more perfect audio quality.

3) It can be turned on and used immediately without exploding the light. How long does it take to turn on and off the high-voltage light source? In case of power failure and lamp explosion, led light source only takes a few seconds.

However, there are still some conflicts between design and experience in the use of Jimi h1:

1) Although Jimi h1 supports lifting and dropping in its setting, its audio function, lens cover opening function and adapter plate design are all suitable for bracket installation, and lifting will cause many inconvenience.

2) The brightness of Jimi h1 is very high, so it can project 150 inches. However, if it is placed behind the sofa, the projection of large size will be blocked by the user in front. If it is placed on the tea table, the projection size will be much smaller, wasting the projection distance, or using trapezoidal correction to make up for it. However, for professional users, trapezoidal correction is generally rejected.

3) The Bluetooth remote control is malfunctioning. I don't know whether it is a case. I hope the firmware can increase the stability of Bluetooth pairing.

4) It is recommended to increase the hdmi audio output, so as not to waste the excellent functions of Android.

However, I have become accustomed to using the Jimi h1 these days. I can watch popular dramas like Qingyunzhi when I turn on the phone. I can watch movies directly when I turn on the power amplifier. And I don't have to wait for a long warm-up time for the projection of the high-voltage light source. At least I have completely solved the problem in terms of the convenience and scalability of use. Sometimes the easy experience is far better than the professional experience.