[PConline evaluation] Now that the household appliance industry is highly competitive, people's living standards are constantly improving. With television and Internet access, the pursuit of home TV is getting higher and higher. Tsinghua Tongfang, a high-tech company led by the information industry, has launched its integrated network television products with its own independent entertainment and educational information. As the weapon of Tsinghua Tongfang to dominate the mainstream market, Tsinghua Tongfang's network TV not only provides unique intranet resources, but also has a warm response in the market due to its outstanding price/performance ratio. Recently, Tsinghua Tongfang LE-42B90i arrived in the PConline evaluation room, the following for everyone to send this TV's evaluation.
Product model: Tsinghua Tongfang LE-42B90i
Reference Price: 3799 yuan
First, Tsinghua Tongfang LE-42B90i first evaluation after the test
Tsinghua Tongfang LE-42B90i uses the current mainstream side-mounted ultra-thin LED backlight system, 16:9 full HD resolution LCD panel, using advanced fourth-generation super decoding technology, can decode dozens of file formats, but also supports Flash playback, real-time browsing of weather, stocks, news, etc., online viewing of popular movies, sharing of Tsinghua intranet teaching resources, etc. The network function is very powerful. The current offer of Tsinghua Tongfang LE-42B90i is 3,799 yuan. The price/performance ratio is very prominent in the low-end market.
Tsinghua Tongfang LE-42B90i Pictures Reviews Forum Quote
On the main performance configuration, Tsinghua Tongfang LE-42B90i uses a 42-inch panel, LED backlight, ultra-thin body, the physical resolution of full HD 1920 × 1080 level, can be described as quite mainstream. Relatively speaking, Tsinghua Tongfang is a high-tech company led by the information industry and has advantages in the integration of information products. The design of integrating network information into home LCD TVs is also quite competitive.
As one of the most commonly used household appliances, picture quality performance is undoubtedly the focus of this evaluation. The author will conduct point-to-point, gray-scale, color performance, dynamic contrast, high-definition television, power consumption, streaming media playback, network functions and other aspects. Evaluation, evaluation of picture effects is for reference only, let us immediately enter the evaluation article. >>
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Second, Appreciation and Analysis of Tsinghua Tongfang LE-42B90i
Tsinghua Tongfang LE-42B90i machine with black as the main color, the body frame with acrylic high reflective material, mirror effect is quite good, simple lines outline the tough body, the whole body emits a stylish and elegant atmosphere.
Tsinghua Tongfang LE-42B90i Pictures Reviews Forum Quote
Tsinghua Tongfang LE-42B90i screen body is very simple in the upper left corner, the whole machine does not have too many fancy spray and decoration, the screen at the lower left corner is also kept simple, the lower right corner is mainly equipped with buttons and power indicator, remote control receiver and so on.
Tsinghua Tongfang LE-42B90i frame details
The keys of Tsinghua Tongfang LE-42B90i are hidden below the bottom right of the screen frame. The keys of the body are from left to right: volume control keys, channel selection keys, menu keys, resource keys, and power keys.
Tsinghua Tongfang LE-42B90i body OSD button
Since the LED backlight is used, the thickness of the body is thinner than that of the LCD TV with the traditional CCFL backlight. The overall thickness of Tsinghua Tongfang LE-42B90i is controlled at about 65mm, and the thickness is well controlled compared to the products on the market.
Tsinghua Tongfang LE-42B90i Side View
Tsinghua Tongfang LE-42B90i has a series of cooling holes on the back of the square to effectively improve the internal cooling effect and play an important role in extending the internal components of the fuselage. The central place has a standard wall hole design to facilitate the wall treatment. The body nameplate is marked with the specific model and origin, and of course, its rated power, MAC address and so on.
Tsinghua Tongfang LE-42B90i on the back of the fuselage
Tsinghua Tongfang LE-42B90i body nameplate
Tsinghua Tongfang LE-42B90i interface area is mainly in the side of the fuselage, with a common interface, SD card slot, network cable interface, 2 sets of USB interface, 1 set of color difference interface, 1 set of AV interface, 1 set of LAN interface, 1 Group cable/antenna port, VGA port, and 4 HDMI ports.
Tsinghua Tongfang LE-42B90i side interface
Tsinghua Tongfang LE-42B90i under interface
Tsinghua Tongfang LE-42B90i's remote control uses a traditional rectangular design, cover the warehouse battery compartment, using two 7 batteries. In actual operation, the work of the remote control is also relatively good, and the resilience of the buttons is also excellent.
Tsinghua Tongfang LE-42B90i remote control
Appearance Tsinghua Tongfang LE-42B90i body is simple, simple lines, the overall body is tough, the acrylic material is full of fashion and elegance, and the use of LED light-emitting diodes as a backlight, the thickness is also more advantages. >>
Third, Tsinghua Tongfang LE-42B90i menu layout
In the menu settings, Tsinghua Tongfang LE-42B90i is designed to be simple and practical, including system settings, image settings, audio settings, system and other options, but also in the image can adjust the color temperature, the screen ratio, noise reduction effect And so on, can be personalized according to personal preferences.
Tsinghua Tongfang LE-42B90i menu layout
Tsinghua Tongfang LE-42B90i offers four scenes: automatic, soft, dynamic, and custom. Among them, customization is available for users to adjust, and in order to allow intuitive understanding of netizens, I chose the first three scenarios to provide reference for comparison.
Tsinghua Tongfang LE-42B90i standard mode effect
Tsinghua Tongfang LE-42B90i soft scene (left) dynamic scene (right) mode effect
Fourth, Tsinghua Tongfang LE-42B90i point-to-point test
During the peer-to-peer test, the PC used by the author was the Lenovo ThinkPad SL400 series, and the signal was input to the TV through the HDMI interface. First, set the PC resolution to 1920×1080 and the refresh rate to 50Hz. Then in the menu, set the auto display area of ​​the Tsinghua tongfang LE-42B90i screen setting to “OFF†and select the display area as “Full Pixelâ€. Tsinghua Tongfang LE-42B90i full HD point-to-point will be presented in front of the author. From the point of view of the actual display effect, Tsinghua Tongfang LE-42B90i performance is quite satisfactory, the text is fairly clear, the effect of general performance.
Tsinghua Tongfang LE-42B90i Full HD Peer to Peer Effect
In the Monoscope Full HD 1080p signal test, Tsinghua Tongfang LE-42B90i performed relatively well on horizontal lines, vertical lines, oblique lines, and circles, but there was a slight overlap in the performance of 1080p lines.
Tsinghua Tongfang LE-42B90i Full HD Peer to Peer Effect
The following is a close-up view of the LCD panel pixel points of Tsinghua Tongfang LE-42B90i. From the pixel shape, the white, red, blue, and green colors of the white screen are arranged vertically and rectangularly, but the screen with lower brightness does not show color. This type of pixel is different from common pixel shapes of various panels. The specific type of the panel is unknown and needs to be further confirmed.
Tsinghua Tongfang LE-42B90i panel pixel map
Tsinghua Tongfang LE-42B90i menu layout is simple and clear, the user is easy to use to adjust, while providing personalized fine adjustments so that users can adjust to their own preferences for their own visual effects. LE-42B90i can achieve full HD point-to-point, the effect is satisfactory, but the source of the LCD screen needs further confirmation. >>
Fifth, Tsinghua Tongfang LE-42B90i grayscale comparison test
Since the screen shot has undergone the necessary software processing and is affected by the actual effect of the netizens' display, the screen displayed on the screen will eventually differ from the actual effect of the TV. Therefore, the actual effect is based on the author's text description. The author uses a Hi-Definition Reference Disc test disc, Sony PlayStation 3 as a Blu-ray player. The digital camera used was a Canon 50D with a Canon EF 17-40mm F4L USM.
The first test was a 15-gradient grayscale test. From the actual screen, the Tsinghua Tongfang LE-42B90i LCD TV performed satisfactorily and can easily distinguish each gray level, with 0 and 1, 14 and 15 gray levels. The distinction is obvious.
Tsinghua Tongfang LE-42B90i Grayscale Comparison Test
In the black gray-scale latitude test, the charcoal line fringe path is clearly seen in the charcoal backlight position; in the charcoal light position, the charcoal texture is general. In terms of noise control, Tsinghua Tongfang LE-42B90i performed well, the picture noise was not obvious, and the color uniformity was slightly insufficient.
Tsinghua Tongfang LE-42B90i black tolerance test
VI, Tsinghua Tongfang LE-42B90i color performance test
First of all, we use DisplayX Tsinghua Tongfang LE-42B90i full color gamut color over test, from the screen performance point of view, bright colors transparent, color transition is relatively smooth, the overall brightness is also relatively uniform control, the effect is OK.
Tsinghua Tongfang LE-42B90i color gamut transition test
For the color performance of the TV, the color that is most difficult to accurately display is golden yellow. In the test process, Tsinghua Tongfang LE-42B90i showed golden yellow rules, for light yellow, pink have a better performance, natural color, but light blue, warm color temperature.
Tsinghua Tongfang LE-42B90i color performance test
The two girls with red, white, and yellow roses hold warm colors on the screen, and their characters show a yellowish color. The hair color is more delicate and natural, and the color of the roses on the hand is not bright enough. Tsinghua Tongfang LE-42B90i provides color temperature adjustment, I believe users can adjust according to their own visual acceptance.
Tsinghua Tongfang LE-42B90i color performance test
Tsinghua Tongfang LE-42B90i color performance test
Tsinghua Tongfang LE-42B90i can clearly show 15 gradient grayscales, and black and white contrast and black gray tolerance are fairly good. The full color range has a good color transition effect, but the overall color temperature is warmer, the color appears duller yellow, slightly less vivid, and the brightness of the four corners is dark. >>
Seven, Tsinghua Tongfang LE-42B90i dynamic screen test
In this part of the test, you need to pay attention to the front door of the fast-moving train and the body plate of the car. I used the same ISO and aperture during the shooting process. The parameters are ISO-400 and F4.0. The time is 1/100 seconds. The author chose a sports scene during this evaluation process in order to allow Tsinghua Tongfang LE-42B90i to show the best dynamic effect.
Tsinghua Tongfang LE-42B90i dynamic picture test
In the high-definition video of a section of vehicles that is played below, we need to observe the car's license plate and the outline of the car body. Tsinghua Tongfang LE-42B90i can play smoothly for the entire video, the license plate and vehicle contour ghost phenomenon is not obvious, and the license plate can be clearly displayed.
Tsinghua Tongfang LE-42B90i dynamic picture test
Tsinghua Tongfang LE-42B90i dynamic picture test
Eight, Tsinghua Tongfang LE-42B90i power comparison test
Tsinghua Tongfang LE-42B90i rated power consumption is 140W, from the author's evaluation experience, the actual power consumption is much lower than the rated power consumption. The author uses the instantaneous power consumption test method, which is to measure the power consumption values ​​of the six screens of red, green, blue, white, black and color transitions in the standard mode.
Tsinghua Tongfang LE-42B90i power consumption test
Judging from the results of actual testing, the power consumption of the six screens of the Tsinghua Tongfang LE-42B90i in the standard image mode is maintained at 106-108 W, which is still relatively low for the 42-inch panel LCD TVs.
Tsinghua Tongfang LE-42B90i has 120Hz motion image processing, but from the dynamic screen point of view, trailing ghost phenomenon is not yet obvious, while the use of LED backlight, LE-42B90i measured power consumption is also between 106-108W, energy saving The effect is good. >>
Nine, Tsinghua Tongfang LE-42B90i HD video test
In the HD video test section, the author played Blu-ray high-definition discs "Home" and "Ip Man 2". The first is the documentary “Homeâ€. The film is rich in color and has more natural environment images. This will be able to better test the performance of Tsinghua Tongfang LE-42B90i in various colors.
Tsinghua Tongfang LE-42B90i HD video test
The second paragraph is "Ip Man 2". This video has rich character details and fast fighting action scenes. From the actual effect point of view, Tsinghua Tongfang LE-42B90i can better show the details of the shadows and the details of the eaves. However, the color of the screen is slightly dark and yellowish.
Tsinghua Tongfang LE-42B90i HD video test
Tsinghua Tongfang LE-42B90 is aimed at the low-end market, playing high-definition video and smooth and clear, without stopping the card frame, and the smear effect is not obvious, but the overall picture is dark, the color temperature is warm, and the picture color is slightly yellow . >>
X. Tsinghua Tongfang LE-42B90i network function test
At present, most flat-panel TVs are equipped with network functions. The LCD TVs launched by Tsinghua Tongfang also have rich network functions, built-in rich software, real-time browsing of weather, stocks, news and other information after connecting to the network cable, online watching of popular movies, and sharing. Tsinghua intranet teaching resources, etc., the network is very powerful.
Tsinghua Tongfang LE-42B90i network setting interface
Tsinghua Tongfang LE-42B90i built-in iTV network interface, access to USB devices, SD card, and built-in Tsinghua school, network consulting, film and television world, online games, media sharing and other network applications.
Tsinghua Tongfang LE-42B90i built-in iTV network interface
Tsinghua Tongfang has exclusive access to Tsinghua University's resources, while LE-42B90i has a built-in Tsinghua Academy that covers a vast amount of resources for children, primary schools, secondary schools, and universities. By selecting related courses, video lectures will also be broadcast. For students, resources are invaluable.
Tsinghua Tongfang LE-42B90i built-in Tsinghua Academy
Tsinghua Tongfang LE-42B90i joins the network consulting function to provide real-time weather forecasting and provide relevant stock market conditions, and the update speed is quicker to grasp real-time information.
Tsinghua Tongfang LE-42B90i built-in network consultation
One of the features of the film and television world, through the online movie watching program, you can watch popular movies, and the classification between different movies is clear, and updated weekly. It is worth mentioning that the author received network restrictions, poor fluency, and clearly defined as SD.
Tsinghua Tongfang LE-42B90i built-in movie and TV world
In terms of network functions, Tsinghua Tongfang LE-42B90i feels quite new and has many built-in extensions, especially Tsinghua Academy, which is very precious for students. Plus real-time network consultation, leisure and entertainment world, such as the film and television to provide users with convenient and practical features. However, I didn't provide a browser. I feel very sorry. >>
Eleventh, Tsinghua Tongfang LE-42B90i streaming media function test
Tsinghua Tongfang LE-42B90i has USB2.0 streaming media playback capabilities, but also supports SD card reading. Support video formats RMVB, MPEG1, MPEG2, MPEG4, H.264, support audio formats MP3, WMA, WAV, AAC, FLAC, support picture format JPEG, GIF, PNG, TIFF. Covers most of the daily media file formats used.
Tsinghua Tongfang LE-42B90i can display various attributes of audio files in terms of playing music, including the modification time of audio files, music type, file size, title, artist, album, genre, and so on.
Tsinghua Tongfang LE-42B90i music file list
Tsinghua Tongfang LE-42B90i music player interface
Tsinghua Tongfang LE-42B90i can also display various attributes of video files in terms of video playback, including modification time, video type, and file size. However, the author played the mainstream video formats such as .TS, .MOV, .RMVB, and .MKV, and the effects were very smooth.
Tsinghua Tongfang LE-42B90i Video File List
Tsinghua Tongfang LE-42B90i HD video playback
Tsinghua Tongfang LE-42B90i can see the file attributes including shooting time, picture type, file size, and resolution. It is worth mentioning that the LE-42B90i has a slightly slower response time when opening larger images.
Tsinghua Tongfang LE-42B90i image file list
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Tsinghua Tongfang LE-42B90i Pictures View
Tsinghua Tongfang LE-42B90i supports USB2.0 streaming media playback function, and supports a wide range of formats, covering most of the daily format files required, plus having an SD expansion card slot, very user-friendly. And video playback is very smooth, audio playback is also quite good, picture browsing, if more than one large file picture switching, there will be a slight Caton. >>
Twelve, PConline evaluation room summary
Tsinghua Tongfang LE-42B90i is positioned in the low-end market in the market and uses an LED backlight source, which is more energy-efficient than the equivalent products, and has built-in rich functions. The built-in Tsinghua University, Internet consultation, movie and TV world, online games and media sharing are all built into the Internet. And other network applications. Streaming media is also a novel addition to the SD card slot, which is very user-friendly.
Tsinghua Tongfang LE-42B90i Pictures Reviews Forum Quote
Through the detailed evaluation of the above multiple projects, PConline evaluation room summarized the performance of Tsinghua Tongfang LE-42B90i as follows:
PConline evaluation room summary:
Tsinghua Tongfang LE-42B90i adopts acrylic appearance material, stylish and elegant design is a home decoration, built-in iTV function, provides a variety of Internet applications, the most outstanding of which is to provide Tsinghua's internal resources, built-in Tsinghua University application, resources for students Quite valuable. Display performance, Tsinghua Tongfang LE-42B90i color performance quite satisfactory, the contrast also performed more mainstream, I believe can meet the daily needs of film and television. At present, the media offers 3,799 yuan, the price is very prominent, and interested friends may wish to pay attention to relevant information. [Back to Channel Home]
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