In the past two years, with the development of technology and intensified competition, the color TV industry has ushered in a new period of change. On the one hand, OLED is rapidly occupying the high-end market as the next-generation display technology. On the other hand, LCD TVs continue to maintain the high-end market share through technological improvements. Following HDR, quantum dots became the main promotion direction of some brands in the LCD market. In response, Skyworth also introduced solid color technology and launched a dispute with the quantum dot technology for the liquid crystal throne. Recently released Skyworth LCD TV's flagship AIR series Q7, it is using a solid color technology, known as the closest OLED LCD TV.
It is understood that the solid color technology adopted by Skyworth Q7 has improved the purity of the light of the three primary colors of red, green and blue, making the performance of the picture more realistic. At the same time, the TV is also equipped with Coolopen System 5.8, using DDR4 memory, allowing users to experience faster response times. In addition, Q7 also introduced the popular borderless full-screen design, which has a more open field of vision and a more novel and stylish appearance. Does Q7 TV have a speedy experience? What about quality performance? Recently, the China Electronics News Evaluation Studio teamed up with the National Digital Audio & Video and Multimedia Product Quality Supervision and Inspection Center to use the most advanced testing equipment in the current quality, sound measurement and intelligent evaluation to conduct an authoritative and in-depth evaluation of the Skyworth LCD TV Q7.
â—† appearance and interface evaluation
figure 1
Figure 1 is the Skyworth Q7 TV for this evaluation. It can be seen from this figure that Q7 TV continues the simple style of Skyworth's recent TVs. It only uses four golden arc-shaped tripods to prop up this huge screen. body. The TV rear speakers, leaving more room for display screen. At the same time, Q7 adopts a full-screen design, which greatly improves the “screen share†and makes the viewing vision more spacious and more immersive. Therefore, TV and mobile phone manufacturers are now working hard to implement a full-screen design without borders.
figure 2
After viewing the front of the screen, the viewing angle is shifted to the side of the screen. In the past few years, television has developed so fast that television has continuously experienced the thinnest new record. Q7 TV is following a new trend of getting thinner and thinner. As shown in Figure 2, its thickness is already comparable to that of the iPhone 7 Plus.
image 3
Let's look at the back of Q7 TV. Skyworth is very particular about the "back aesthetics" of this product. As shown in Figure 3, the upper part of Q7 TV uses a shark fin design. As long as you look closely, you can find that there are speakers on the back of the TV, there is a host in the middle, and three special “shark fins†are dotted on it. This way is not only more beautiful, but also can play a role in strengthening the screen body. Moreover, the upper part of the back of the TV uses a metal wire drawing process (see Figure 4), which looks much larger.
Figure 4
In the interface, as shown in Figure 4, and Skyworth's current main OLED product S9D TV, the back of the right side has two rows of interfaces, with subwoofer output, network, 2 HDMI2.0, video input, USB 3.0, USB 2. 0, optical audio output, audio / video output interface, etc., fully meet the family's daily audio-visual entertainment needs. Q7 TV puts the interface on the left side and the upper side, which makes the integrated design of the host and speaker plastic housing possible and more integrated. At the same time, in order to prevent dust from falling into the above interface, Skyworth specifically added a dust-proof tape.
Figure 5
The remote control is still a classic front-end, small, round, streamlined "Chuangwei", but, corresponding to the color of the Q7 bracket, the color of the remote control's main body is also changed back to champagne gold, the keyboard area is corresponding to the border and black, and the Q7 TV Seamless. Of course, Skyworth's remote control still fits the human hand and is easy to control.
Quality evaluation First, the objective parameter evaluation According to Skyworth official introduction, this evaluation of Skyworth Q7 TV, using LG Display original 4 color 4K LCD screen, while introducing Dolby Vision, using a new generation of color enhancement technology - solid color technology, It can absorb backlight stray light through the light nano material. How do these factors change the picture quality?
We have adopted the state-of-the-art testing equipment of the National Digital Audio & Video and Multimedia Product Quality Supervision and Inspection Center and based on the "Ultra High Definition Display Certification Technical Specification" promulgated by CESI (China Electronics Standardization Institute) last year, High-definition display indicators such as brightness, brightness uniformity, horizontal color viewing angle, contrast, and color gamut coverage were evaluated one by one, and the dynamic resolution indicators for measuring the effect of high-speed motion pictures were additionally measured, and the quality of Skyworth Q7 TV was evaluated. The evaluation is summarized in Table 1:
(Note: According to the “Ultra HD Display Certification Technical Specification†promulgated by China Electronics Standardization Institute, the definition refers to the clearness of details of television images that can be perceived by the human eye, and is represented by television lines.
The maximum display value of the resolution and redisplay rate of the test tool is 2160 and 100, so the two items are excellent. )
1. Sharpness test
Figure 6
Figure 6 shows the 4K resolution test chart. We can get the resolution of this TV through the visibility of the TV line (horizontal and vertical lines in the figure) of this test chart.
Figure 7
Figure 8
As shown in the partial close-up view of Fig. 6 in Fig. 6, among the six TV lines in the figure, the upper two squares are used to test the 4K resolution. The parts shown in Figure 8 are the resolutions that can be achieved for testing faces with different skin colors. From this figure, we can clearly identify the details of the four faces, indicating that Q7 has a different resolution when presenting images of different colors. Can achieve 4K display.
Figure 9
In order to let readers more intuitively understand the effect we see in the evaluation, we compare the Q7 with the main LCD TV that a company released this year last year in the image standard mode. On the left is Q7. It can be found that Q7 presents different skin colors. Faces are more natural, with darker faces being more visible (Figure 9).
2. Color gamut coverage test, color coordinate deviation, base color wavelength
Figure 10
The coverage of color gamut determines the ability of product color rendering. The higher the color gamut coverage, the richer the effect of color expression. In this test session, we first test the color coordinates of the three primary colors of Q7 red, green, and blue, and then find the color gamut coverage based on the test results and plot the color gamut. As shown in Figure 10, the blue triangle part is the gamut coverage of the Q7 TV.
Figure 11
According to the (United States) National Television Standards Committee (NTSC) standard test, the color gamut coverage is generally better than 90%, and we measured the color gamut coverage of Skyworth Q7 TV as 111.02%, which is excellent. Therefore, when playing a colorful 4K picture, the picture color presented by the 4K TV is more diverse.
R, G, B represent the three primary colors of red, yellow, and blue. Through professional instrument testing, R and G of Skyworth Q7 TV are all in the natural light band. Although B is not in the natural light band, it is close to the natural light band of B, so Q7 The primary color wavelength is better. Figure 11 shows that when Q7 TV and a common LCD TV play seven-color light maps at the same time, Q7 plays red, yellow and blue obviously more natural (Note: All the following dual-screen comparison diagrams are Q7 TV pictures on the left side of the picture).
Q7 uses LG Display's RGBW 4K panel, which adds white (W) sub-pixels to RGB. In general, the smaller the color coordinate deviation, the better, in which the color coordinate deviation values ​​of the three sub-pixels R, G, and B are relatively better than 0.1, and the color coordinate deviation value of the sub-pixel is relatively excellent at 0.01. about. Through the test of professional instruments, it is concluded that the RGB color coordinate deviation values ​​are all less than 0.1. The W color standard deviation value also meets the requirements. The color coordinate deviation of Q7 is excellent, so Q7 does not play a colorful 4K picture. Will be color cast, the color will be more pure.
3. Color Restoration, Viewable Angle (Chroma Angle, Brightness Angle) Test this section We test the perspective of Skyworth Q7. The test found that the (horizontal) chroma viewing angle of Skyworth Q7 TV reached 170 degrees, approaching the limit of the test equipment, and it was an excellent level; while the (horizontal) brightness angle of view was 105 degrees, it performed well.
Figure 12
As shown in Figure 12, we let Skyworth Q7 and a regular 4K LCD TV play red pictures at the same time.
Figure 13
When viewing two televisions from the side at 45 degrees, the left side of FIG. 13 is a Q7 television picture effect, with no change in brightness and chromaticity, the same as the front view display. The right side of FIG. 13 shows the partial screen effect of a normal 4K LCD TV, which appears light red, and there is a similar phenomenon as long as it is not viewed from the front.
4. Contrast, On-Off Ratio, Brightness, Brightness Uniformity Test Contrast refers to the different brightness levels between the lightest and darkest blacks in the bright and dark areas of an image. In general, the greater the contrast, the clearer the image, and the richer the sense of hierarchy. High contrast is very helpful for image clarity, detail performance, and grayscale performance.
Comparing the ordinary 4K LCD TV with Skyworth Q7 TV, Skyworth Q7 TV has excellent performance in terms of contrast, and can truly represent and actually match the colors. In order to further measure the contrast, we also let the display display 100% full white field image or display 0% full black field image, and then measured by professional instruments, we obtained the on-off ratio of 1588846:1, which shows that Q7 TV has excellent Contrast.
In terms of brightness, we obtained a peak screen brightness of 577.8cd/m2 for the Skyworth Q7 through professional instrument testing. It is reported that there are also organizations that have peak brightness of 600cd/m2 or more in different evaluation modes. Product requirements are 250cd/m2.
Figure 14
As shown in Figure 14, we let the left Q7 and the right normal 4K LCD TV play four white boxes at the same time. Although the actual brightness of the 4K LCD TV is brighter, the normal 4K LCD TV screen is affected by the partition processing. The four white boxes are Brightness is not as bright as Q7. This shows that the 4 color 4K screen has more white sub-pixels than the traditional 4K screen, and the light transmittance is improved, making it brighter and more transparent.
5. The blue light intensity is lower and the blue light in the eye is visible. The energy intensity in visible light is second only to ultraviolet light and can even penetrate the lens directly to the retina. So long exposure to blue light is dangerous. In order to avoid the strong blue light brought by the LED lamp beads, Skyworth Q7 TV has specially added eye protection function.
When the eye is opened, the blue light energy released from the TV screen is significantly reduced by 2.59%e-2W/sr, as shown in Table 2, through the professional instrument test.
Second, the quality of subjective evaluation After the above objective parameters test, I believe we have a good grasp of the various parameters of Skyworth Q7 picture quality, below we play a few videos to Q7 picture quality to make a more Intuitive understanding.
Figure 15
Figure 15 is a frame of the same picture during the broadcast of "Yueyuezhuan". The left Q7 TV shows the characters more obviously than the normal LCD TV on the right. Especially for human faces, the face color of the Q7 TV is pale yellow, and the ordinary LCD TV turns into sallow, and the details of the left face of the character are obscured by shadows, and the details are not displayed. If you look at the screen carefully, you will also find that the details of the Q7 display character background are also more abundant. 1. Pure color technology Skyworth Q7 TV adopts solid color technology. Pure color technology is a new generation of color enhancement technology. It absorbs backlight stray light through light nanomaterials, thereby purifying backlight source colors. On the basis of achieving a wide color gamut, the color purity is improved, and the advantages of more accurate colors and more realistic images are achieved. In order to verify its effectiveness, we specifically let Q7 TV play OLED TVs to present the perfect presentation video.
Figure 16
First of all, we captured a picture showing a variety of red balls. As shown in Figure 16, we can clearly separate the light red, dark red, and rose red balls in the picture. At the same time, we can also observe some details of the ball. The red ball has a clear outline. Most red balls have White reflections, deep red balls and deep black spots.
Figure 17
In order to further verify the effect of solid color technology, we also left the left Q7 TV and the right LCD TV on the same frame at the same time. As shown in Figure 17, the wings of the ordinary LCD TV have completely concealed the details due to too much red light, and the Q7 TV The wings shown are light red and dark red, with layers, details, and more natural.
2. Color perspective
Figure 18
We select a colorful picture from the video to pause the frame. The picture has three colors: red, brown, and blue. The color of the front view is shown in Figure 18.
Figure 19
Figure 20
In order to test the television's color vision, we went to the right-hand side of the TV at a 45-degree angle, photographed the photograph in Figure 19, and then moved to the right by 60°, and photographed the photograph as shown in Figure 20. , watch the changes in its color. From the perspective of Figure 19 and the angle of Figure 20, it can be seen that the colors seen by different viewing angles are basically the same, the red portion on the right side of the frame is still bright red, and the brown and blue portions are distorted, but not obvious, the leftmost The details of the side shadow are still clear, and the reflection of the red part at the bottom right is still visible, which is a very good view of the color angle that we have evaluated.
3. HDR
HDR is an abbreviation of high dynamic range image, in which the dynamic range refers to the range of brightness and contrast, and it can expand the brightness range while improving the contrast of light and shade to highlight the image details.
Figure 21
As shown in Figure 21, the color of the Q7 TV's display is red and blue, and the colors are more abundant, while most of the ordinary LCD TV's display is blue and a few blue. Moreover, the Q7 TV can display more details such as the edge of the holder, the red edge line is clearly visible, and ordinary LCD TVs do not show a holding device, all black.
Figure 22
As shown in Figure 22, the color of the normal LCD TV on the right is very pale, and the surrounding spot color is relatively single, while the color of the Q7 TV display on the left is rich in color, both white, yellow, and deep red and pink. Clear, more natural. Also note that comparing the red dots next to the two lights, one can see that the Q7 TV shows more red dots and is clearer, while the ordinary LCD TV shows very few red dots.
â—† Sound quality evaluation
Figure 23
Figure 24
As shown in Figure 23, Skyworth Q7 is equipped with a smart three-way technology based on the extension of the JBL audio. This allows the TV to intelligently identify the audio frequency band, and independently vocalizes the high, mid, and bass speakers according to the frequency band to make the treble. The effect is rich and detailed, the midrange is clear, and the bass is even more shocking. As shown in Figure 24, Skyworth Q7 TV has also adopted a large cavity design. Its audio volume is twice that of ordinary ultra-thin TVs, and the sound is very three-dimensional. So, how powerful is the sound of this TV? China Electronics News Test Studio has tested the acoustic frequency response and total harmonic distortion of Skyworth Q7 TV.
Figure 25
As shown in Figure 25, this audio test was conducted in the professional environment of a national muffler room of the National Digital Audio & Video and Multimedia Product Quality Supervision and Inspection Center. The measuring microphone was placed 2m in front of the TV, perpendicular to the TV plane. The test expert uses a professional audio signal generator to send a signal to the television, and the microphone collects the sound and transmits it back to the audio analyzer for analysis.
1. Acoustic Frequency Response Test Acoustic Frequency Response (referred to as Acoustic Frequency Response) means that when a constant voltage output audio signal is connected to the system, the sound pressure generated by the speaker increases or decreases with frequency, and the phase occurs with frequency. The phenomenon of change. This is a very important parameter indicator, which reflects the relationship between the amplitude of the television sound and the frequency. The greater the range of acoustic frequency response, the better the sound quality.
According to the electronic industry standard SJ/T11343-2015 "General Specification for Digital Television LCD Monitors", televisions with a screen size >68cm should have a non-uniformity of less than 20dB in the range of 200Hz to 6.3kHz; according to the electronic industry standard SJ/T11157.2 -2016 "Measurement methods for television broadcast receivers Part 2: Measurement methods for electrical and acoustical performance of audio channels" tests Skyworth Q7. The test results show that Skyworth Q7's acoustic frequency response characteristics (non-uniformity of specified frequency ranges) Respectively - left channel 12.7dB, right channel 13.1dB, the test results are significantly better than the industry standard requirements.
In contrast, we found that Skyworth Q7's acoustic frequency response performance is much better than the industry standard, and it also exceeds the vast majority of 4K TVs on the market. Test engineers also found that the high frequency and low frequency components of Skyworth Q7 audio are the highlights: low frequency band Q7 dive to 67Hz and below, and high frequency to 18kHz to 20kHz still have good performance; combined with Q7's intelligent three-way frequency technology, It can bring good performance to various frequency bands, and thus ensure that Skyworth Q7 perfectly presents rich bass and transparent treble, bringing shocking home theater effects.
2. Total Harmonic Distortion Test In addition to testing the acoustic frequency response, we also tested total harmonic distortion. It is generally believed that the smaller the value of the total harmonic distortion within a certain limit, the more pure the tone is, and the higher the quality of the product; and when the total harmonic distortion is less than 1%, the ears are generally indistinguishable, and if the total harmonic distortion is more than 10%, distortion can be clearly heard. The ingredients.
Figure 26
According to the electronic industry standard SJ/T “General Specification for Digital Television LCD Monitorsâ€, the total harmonic distortion of the sound pressure at rated input should not exceed 10%. The Skyworth Q7 is tested according to the electronic industry standard SJ/T11157.2-2016 "TV Broadcast Receiver Measurement Methods Part 2: Measurement of Electrical and Acoustic Performance of Audio Channels". The test results are shown in Figure 26, the total harmonic of Skyworth Q7. Wave distortion is in the range of 200 Hz to 6.3 kHz, which is -<3.3% for the left channel and <3.2% for the right channel. It can be seen from the test results that Skyworth Q7 TV's sound quality is pure and its quality is very high. The test results are shown in Table 3.
â—†Intelligent performance evaluation In terms of configuration, the total number of Skyworth Q7 TV processors is 30. The CPU is clocked at 1.7 GHz. Compared with the mainstream specifications of the current four-core CPU of smart TV chips and the mainstream frequency of 1.5 GHz, the CPU can be said to have a certain improvement.
We have also noticed that Q7 TV adopts a new generation of DDR4 memory, and its theoretical speed is twice that of DDR3 at the same core frequency, and the reliability is further improved. Whether it is loading 4K video or application switching, it is faster than DDR3. So, what exactly is this smart TV experience? We conducted a comprehensive evaluation of Skyworth Q7 smart TV performance.
1. Boot time In this evaluation, we calculate the boot time of the first boot and the boot time after downloading several APPs. The results are all about 15 seconds. (Note: The definition of the boot time is from the press of the power of the remote control. Key, time to appear on TV program screen or TV system homepage). Q7 also introduced boot optimization.
2. Application loading
Figure 27
Skyworth Q7's main interface design is relatively simple, each category is reasonable and suitable for search. We click into movies, games, games, etc. Q7 has a fast response time and loads faster. Figure 27 shows a larger video game. When experiencing the game, the Q7 can respond quickly and without the phenomenon of stalling. This is inseparable from its powerful hardware performance. The TV also has a deep optimization of the system.
3. Search Response Input Pinyin “SSSS†on the search interface. Right soon you will find popular movie and TV content such as Sansheng III. The search response time is fast and the search speed is fast.
â—† Content interactive evaluation Skyworth Q7 TV equipped with the latest 5.8 version of the cool open system, UI design simple and refreshing, floating slider design to support the playback of video at the same time, home page menu switching and selection.
1. Home and application circle
Figure 28
Figure 28 is the latest Coolopen 5.8 system. The home page is concise and clear. We can find and switch between different pages. Compared with the version before the CoolOpen system, cool open applications are more abundant. Take film and television as an example, Cool Open not only owns a single Tencent video or other video, but also a collection of Youku, iQiyi, Mango, CIBN and other video applications, with a huge amount of video content. Fig. 29 shows “Cool Application Circleâ€. Its recommendation page includes applications such as audio and video, education, games, life, and management, as well as the application of Cool Coop.
Figure 29
2. Cool open video VIP free delivery
Figure 30
As shown in Figure 30, all consumers who purchase Skyworth Q7 TVs will receive a free video VIP for one year and an iQiYi Gold VIP for one year. VIP can be used on TVs, mobile phones, computers, iPads, and cool VRs. . We also found that Skyworth Q7 TV has a special reduction area, as long as the purchase of the above products, set aside 100 yuan, very affordable.
3. Voice interaction
Figure 31
Q7 TV has Sogou voice search function, which can search all kinds of latest videos, weather conditions all over the country, and also can query stocks. As shown in Figure 31, we press the remote control's voice key to say "San San III", then release the voice key and immediately search for popular movies and videos such as "San San III".
4. Screenshot sharing features Mobile WeChat APP occupies most of our lives and shows the importance of social networking in our lives. If you can give television some social attributes, it will increase the activity of television-related applications. We have found that Q7 TV has a screenshot feature and a circle of friends. The latter allows friends and family to create a small circle on the TV. The former has more sharing properties. Users can download a cool open wizard to take a screenshot of any interface on the TV. . The user can save favorite pictures or pictures with key information through the screenshot function, and can also share funny video pictures with friends and share happy times.
5. smart family
Figure 32
Smart home products have gradually penetrated into life. This is inseparable from the unremitting efforts of home appliance companies. They are constantly introducing smart products to enrich family life. We have found that Skyworth Q7 has opened up a space for smart families specifically. Figure 32 is a store page. After entering, we can see a variety of smart products, including cameras, patch panels, and lighting. Users can purchase various home smart products through this platform and set up multiple, intelligent living scenarios.
â—† Evaluation summary Technology upgrades always allow manufacturers to gain more opportunities in the market competition. Skyworth Q7 equipped with solid color technology allows LCD TVs to significantly improve the quality of the picture, the color is more pure and natural, with JBL audio, to the consumer with A new audio visual experience. In addition, the high-gloss black, full-screen, all-metal top-level appearance technology design also makes this TV seem to be compelling. The new cool open system 5.8, DDR4 memory can be described as a combination of two swords, so that the TV's operation, running more smooth and natural, to meet the user's need for rapid response TV. Intelligent voice interaction, one-year free cool video, etc. is a great gospel of the majority of users.
Skyworth Q7 is indeed the flagship product in LCD TVs. It has excellent performance in all aspects. OLEDs still waiting to see friends can consider this LCD TV which is the closest to OLED so far and is definitely worth the money.
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