1. Response time

The speed of the response time is an important indicator to measure the quality of the liquid crystal display. The response time refers to the response speed of the liquid crystal display to the input signal, that is, the response time of the liquid crystal from dark to bright or from bright to dark. Generally speaking, it is divided into the response speed of the input signal, that is, the response time of the liquid crystal from dark to bright or from bright to dark. Generally speaking, it is divided into two parts: Tr (rise time), Tf (fall time), and The response time we are talking about refers to the sum of the two. The smaller the response time, the better. If it exceeds 40 milliseconds, there will be a hysteresis of moving images. At present, the standard response time of LCD screens is mostly around 25 milliseconds, but there are also a few models that can reach 16 milliseconds. With an ultra-fast response time of 16 ms, it can display more than 60 frames per second, completely solving the ultra-fast response time of traditional LCD screens, and it can display more than 60 frames per second. Solve the problem of smear and afterimage in traditional LCD screen when playing games or watching DVDs.

2. Contrast

Contrast refers to the ratio of the brightness of the bright area to the dark area of the display screen under the specified lighting conditions and observation conditions. Contrast is a parameter that directly reflects whether the LCD screen can reflect rich color levels. The higher the contrast ratio, the restored picture level. feel better. At present, the nominal LCD screen is 250:1 or 300:1, and the high-end products are 400:1 or 500:1. The point here is that the contrast ratio must be matched with the brightness to produce the best display effect. A high contrast ratio of 400:1 or 500:1 will display more vivid colors and softer images.

3. Brightness

The brightness of the LCD display is generally higher than that of the traditional CRT display. The brightness of the LCD display is generally measured in CD/m2 (lumens per square meter). The higher the brightness, the stronger the anti-interference ability of the display to the surrounding environment. The display effect is brighter. This parameter should be at least 200cd/m2, preferably above 250cd/m2. The higher the brightness of the traditional CRT display, the greater its radiation, and the brightness of the LCD is through the fluorescent tube backlight to get, so for people the higher the degree, the greater its radiation, and the brightness of the LCD screen is obtained through the backlight of the fluorescent tube, so there is no negative impact on the human body.

4. Screen dead pixels

The most common screen dead pixels are white points or black points. The identification method of black points is to adjust the entire screen to a white screen, and the black points have nowhere to hide; white points are just the opposite. The original form will also appear. Usually, the display screen with no more than 3 dead pixels is considered as qualified to leave the factory, the screen within 3 points is A screen, the screen with more than 3 points and less than 10 points or with light spots is regarded as screen B, and the screen with heavy spots and lines is regarded as screen C.

5. Viewing angle

The liquid crystal display is a backlight type display device, and the light emitted by it is provided by the backlight behind the liquid crystal module, which inevitably leads to the liquid crystal display having only one best viewing angle - front view. When you look at it from other angles, because the backlight can penetrate the pixels next to it and enter the human eye, it will cause color distortion. The range without distortion is the viewing angle of the LCD screen. The viewing angle of the LCD screen is also divided into a horizontal viewing angle and a vertical viewing angle, and the horizontal viewing angle is generally larger than the vertical viewing angle perspective. At present, as long as the horizontal viewing angle reaches 120 degrees and the vertical viewing angle reaches 140 degrees, it can meet the application needs of most users. The latest LCD panel is produced with a wide viewing angle technology, which can reach a viewing angle of 140 degrees up and down and 150 degrees left and right, reducing the inconvenience caused by the small viewing angle. Of course, this performance is not comparable to the viewing angle of the CRT display close to 180 degrees, but it is more than enough for most applications.

6. Dot pitch

The dot pitch of the LCD screen refers to the size of the interval between each pixel that composes the LCD screen. At present, the standard dot pitch of the mainstream 15-inch LCD screen products is generally 0.297 mm, and the corresponding resolution is 1024X768. The standard dot pitch of inch LCD products is generally 0.297 mm, and the corresponding resolution is 1024X768.

The viewing area of the LCD screen is "real", and there is generally such a reference: the viewing area of a 15-inch LCD screen is close to a 17-inch CRT display. The viewing area of the 15-inch LCD screen is 304.1x 228.1 (mm).

7. Thickness

Since the panel thickness of the LCD screen itself is the same, that is to say, the main factors affecting the thickness of the LCD screen will be the technology of the circuit control screen, the design of the plastic casing, and the compression of the space inside the machine. Of course, it incorporates quite cutting-edge liquid crystal technology, using the latest ultra-thin liquid crystal panels and thinner high-brightness cold cathode fluorescent lamps, plus more cutting-edge liquid crystal technology, using the latest ultra-thin liquid crystal panels and thinner High-brightness CCFLs, coupled with more integrated control IC design and optimized heat dissipation, can also achieve the purpose of reducing the overall size.

We are committed to developing and manufacturing high-quality display products.  We are specialized in providing small and medium size LCD display, LCD module, LED backlight, TFT display, OLED display and other extensional products for worldwide customers.The price of our products is very competitive. If you are more interested in our products, please feel free to contact us.

Tel: +86-755-28445701 

Mob: +8618926478800 

Email: info@sindadisplay.com

Skype: Sinda Display