How about watching a large block at home? Optoma ZH55 laser projector depth experience

2021-04-19

When reading a book, whenever he learns that the school wants to display a patriotic propaganda film at night, he will always be so excited that he doesn’t want to go to class. At that time, he always thinks how good it is to watch such a movie every day. After work, he plans to wear it at home afterwards. The projector can feel the feeling of the cinema at any time; later, considering the high cost of the projector, low brightness and high maintenance costs, the projector has to be abandoned; nowadays, the projector technology is more and more advanced, and the laser is a new light source. Gradually widely used, due to long life, so low maintenance costs later, many manufacturers have started to introduce a laser projector, and Optoma ZH55 laser projector is one of the representatives.

Product information

Display Technology: Texas Instruments DLP Technology

Resolution: 1920×1080

Output brightness: 3000 lumens

Contrast: 22000:1

Displayable color: 10bit

Projection size: 26 inches to 300 inches

Projection distance: 1.3m~9.4m

Projection ratio: 1.07 ~ 1.45

Keystone correction: ±30°

Image format: 16:9; compatible with 4:3

Interface: HDMI×2 (HDMI2 supports MHL), RJ45×1, Audio out×1, 3D VESA×1, Audio In×1, USB 2.0×1, USB 3.0×1, RS232×1, VGA in×1, Composite (AV)×1

Uniformity: 80%

Built-in speaker: 8W×2

Operating noise: 27dB (ECO mode)

Light source life: 20000 hours (standard)

Total power consumption: Full: 335W ± 15%, ECO: 225W ± 15%

Volume/weight: 402mm×339mm×117mm/6.2Kg

Reference price: 15999 yuan

With the development of miniature projections in recent years, there are many unknown miniature projection brands on the market. With a compact body and low price, the miniature projection attracts a large number of early adopters. However, micro projectors have lower brightness and color than traditional large projectors. Ordinary home projectors are not very expensive nowadays, most of them are between 3,000 yuan and 5,000 yuan, but these projectors are used traditional ultra-high pressure mercury lamp light source, let alone noise, heat and color, only light bulbs The short life span and high cost of late maintenance have caused many users to consider carefully.

However, until the last year or two, as laser projection began to be widely used, and at the same time, the advantages of projectors of laser light sources in terms of color, longevity, and brightness, projectors of laser light sources are generally used to project light from conventional light bulbs. The machine is higher in price, but the laser projector is lower in maintenance cost. As a new light source that hasn't been completely popular yet, what exactly is a laser projector? We will tell you through Optoma ZH55!

Optoma ZH55 is mainly targeted at home high-end projectors, but for a home projector, it is different from commercial and educational projectors, and has a higher appearance and color value. From the appearance point of view, Optoma ZH55 can be said to be the home value of the projector, black and white color, and any home improvement style are more with. At the same time, the size of the Optoma ZH55 is not too large and the appearance does not look bloated. Its measurement size is 402mm × 339mm × 117mm, weight is 6.2Kg, body shape control is more coordinated.

Optoma ZH55 in the details and workmanship have highlighted the style of the factory, the shell uses a PC plastic material, while adding a matte design, touch the edge of the fuselage without burr, exquisite workmanship. At the same time, the gaps are handled in place and the joints are tightly jointed.

On both sides of the fuselage, it is the heat dissipation part of the Optoma ZH55. On one side of the fuselage, an external cooling fan can be seen through the external grille. The heat sink is equipped with a heat-conducting copper tube and cooling fins, and the other side. Also with a dust filter. If you need to replace or clean the dust, you can directly extract the filter from the bottom, and the design is very simple and convenient.

▲ Removable filter

In addition, bare screws can be seen on both sides of the ZH55 grille, which looks a little affecting the overall appearance, and may be better if using concealed screws or snap-in designs. The ZH55 has two 8W SRS audio amplifiers built in. When we play the video, I feel that the sound quality is good for the built-in audio. If you are not golden ears and the sound quality requirements are not high, then we recommend that you do not have to Purchase the sound separately.

Because home projectors are used frequently, and in order to satisfy different home use scenarios, the requirements for the interface are relatively high. Optoma ZH55's interfaces are all integrated in the fuselage tail, arranged in a word. Its interface is also relatively complete: USB 2.0/3.0, HDMI/MHL, RJ45, VGA, RS232, AV composite interface, etc., to meet the diverse needs of users is completely sufficient.

▲ interface with a comprehensive

▲ with a remote control

The lenses of Optoma's ZH55 support focus and zoom adjustment and support ±30° trapezoidal correction. For many small rooms with limited space, trapezoidal correction is very practical. Even if the position is not in the middle, it can be corrected to achieve the best viewing effect. This also makes the installation of the projector more flexible and free.

With the foot pads and VESA holes provided on the bottom of the Optoma ZH55, it offers three installation methods: lifting, flat placement and hole drilling. If it is flat, the knob pad at the bottom of the knob can be adjusted to adapt to different environments. We know that a large part of the average home projector is a 1.1x zoom lens, which takes about 3.3m to project a 100-inch screen. The Optoma ZH55 uses a 1.36x zoom lens. Compared to a 1.1x zoom lens, it only takes about 2.4m to project a 100-inch screen, which is practical for small-sized apartments with a width of 3m in most living rooms.

▲1.36x variable short-focus lens

▲The bottom of the design of the pad, bracket hole, lifting buckle

Smart TVs have become popular, and smart projectors can't keep up. Besides, just as a projection tool, it is difficult for many consumers to buy. Optoma ZH55 built-in Ali Yun OS smart operating system, the system and many TV and TV boxes built-in system is similar, with recommendations, film and television, shopping, education, and application of the five resources.

▲ Built-in Ali cloud intelligent operating system

At the same time, it can play massive video resources on-line by matching the China TV broadcast platform. The system has a built-in “Dangbei Market” app that can install third-party applications. From the operability of the built-in system, it is easy to get started, the system's response speed is fast, the operation is smooth, there is no stalling phenomenon. The ZH55 supports wireless networks, but from an experience point of view, it may be the reason for individual evaluation samples. The wireless network cannot be opened, which is a bit disappointing.

Optoma ZH55 provides standard projection, cinema, game, and custom four projection scenarios. You can select the appropriate mode according to the specific scene. In addition, it can also perform some custom adjustments on images and sounds. In the projector's setup menu, the projector's position, keystone adjustment, and 3D function settings can be selected. From a functional point of view, Optoma ZH55 has many functions and is not complicated in terms of projection adjustment. For most users, there is no high learning cost.

At present, most of the projector display technologies on the market are DLP. Although 3LCDs have applications on some models, such as Epson and Sony, they are not widely used today. DLP can be said to be the mainstream of the current projection display technology, the main advantages in the color transition natural, 3D no crosstalk and so on. The Optoma ZH55 laser projector uses DLP technology from Texas Instruments and has 3000 lumens and 22000:1 contrast. Its resolution is 1920×1080@60Hz, even if it is an external PC or PS4 to “live football” there is no problem.

▲ Principle of Laser Projection Display Technology

The Optoma ZH55 uses a laser light source, and the advantages of the laser are long life of the light source, low power consumption and low maintenance cost. With the continuous improvement of projection technology, brightness and color have also been greatly improved. Many users may not understand the working principle of laser projection. In simple terms, laser projection uses the built-in laser light emitting unit to project red, green and blue laser light onto the DMD components of the DLP display chip, and finally project it.

No matter how rich the function of any display device, but in the end the most basic or in the display performance, Optoma ZH55 said that the use of self-developed SWG (Super Wide Gamut) color enhancement technology, by adjusting the red, green, blue, yellow different color segments The light output ratio, while allowing the laser engine to filter out solid color RGB wavelengths, the official claim that the color gamut covers an area of ​​118% HDTV (the data is the official nominal specifications, MC will use NTSC CIE1931 standard test), so that the color performance is more it is good. In addition, Optoma ZH55 also added "PQ Processor Embedded" technology, this technology can handle the color, enhance the dark part of the picture, so that a stronger sense of three-dimensional, richer picture level.

We played a 1080p video and four test pictures on Optoma ZH55 via flash disk. It gave me feedback that the decoding speed is very fast. The mainstream MP4, MKV, avi and other formats can be played without delay. Caton and sound and painting are not synchronized. However, in terms of color, in my opinion, Optoma ZH55 still needs to be strengthened. Whether it is standard or custom mode, its color always has some deviations, such as the red color is not enough natural, if it is the cinema mode, the red is overfull. In addition, from the test picture, it's black is doing quite well and is quite deep. At the same time, both the dark part and the bright part can achieve the best state, which mainly depends on the ZH55 itself has high brightness and high contrast.

We preheat the Optoma ZH55 for about 1 hour, and after adjusting the brightness to the maximum in the custom mode, we performed the brightness test with the TES1339 Light Meter Pro. The luminous flux of 1343 lumens is lower than the declared 3,000 lumens. In actual use, since Optoma ZH55 supports dynamic brightness, if it is used in a night environment, 50% of the default brightness is sufficient. And if it is used during the day, we recommend using a curtain (blackout cloth) to use it, not for privacy, just to see more clearly. In terms of color, the NTSC gamut coverage area of ​​the ZH55 is 71% (87% for CIE1976), which is equivalent to the middle level of the display. In addition, the Opteron ZH55 215.4W power consumption has reached the mainstream level, power consumption is not high, but it is not low. In terms of the overall color performance, Optoma ZH55 still has room for improvement.

▲71% NTSC color gamut coverage

▲The maximum temperature at the outlet is 51.5°C

In addition to being the first year of development of VR, 2016 is also the first year of laser projector development. As a new light source, from our experience with the Optoma ZH55, its popularity is still facing two major difficulties: first is the price, put aside some low-end cheap portable laser projectors, the current mainstream The price of home laser projectors is still generally high, but it only means that the maintenance cost in the later period is low. Secondly, the adjustment of the color needs further strengthening. Of course, this has a very big relationship with the color adjustment of the manufacturers. Looking back at the Optoma ZH55 itself, this product gave me the impression that performance in the design, system operation and sound effects are remarkable. The disadvantage is that the color display performance still needs to be strengthened. If the Optoma ZH55 is further improved in color, it is believed that it will obtain better market performance.

Industrial Laser Distance Sensor, we also call it secondary development laser distance module, which support TTL level and CMOS. The laser range sensor can be widely used in professional surveying, mapping, construction, robots, hunting arrows, industrial monitoring and automated measurement applications in electricity, transportation, etc. Our laser distance module supports data communication with RS232, USB with a simple adapter. The results of laser distance sensor can be evaluated with Arduino. We are always looking ahead, hoping we can make every measurement simple in life!

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