How to choose a good LCD display screen? The LCD screen mainly depends on its main parameters, such as contrast, brightness, display color, signal response time, viewing angle, screen refresh rate, resolution, etc.
1. Contrast
Contrast is related to the materials used to make LCD panels. If the quality of components such as ICs, filters, and alignment films is well controlled, the contrast will be higher. But for ordinary users, a contrast ratio of 500:1 is sufficient, while for professional users, the contrast ratio should be higher. For example, the contrast ratio of the new high brightness LCD screen can reach 1000:1 or above, which can fully meet the needs of professional fields.
2. Brightness
The brightness unit is cd/m2. If the brightness is too low, the picture will feel darker. If the brightness used in indoor environments is around 200-300cd/m2, it is sufficient, while if used outdoors, a brightness of 500cd/m2 or above is required.
3. Signal response time
Signal response time refers to the response speed of an LCD to an input signal, usually measured in milliseconds (ms). According to the inspection ability of the human eye, if the response time exceeds 40ms, there will be hysteresis in the moving image, resulting in residual or trailing images. Therefore, the shorter the response time, the better.
4. Visual angle
The visual angle can be divided into horizontal angle and vertical angle. The horizontal angle is centered on the vertical axis of the LCD screen and can be moved left and right to clearly see the angle scale of the image; The vertical angle is centered on the parallel axis of the LCD screen, and when moved up and down, the angle range of the image can be clearly seen.
5. Display color
Display color refers to the color representation of the displayed image. Early LCDs could only display high color (256 colors) at most. With the continuous advancement of display technology, current LCDs can now achieve full color (32-bit) mode.
6. Screen refresh rate
The screen refresh rate, which refers to the frequency of screen refresh during the display process, is related to the refresh rate of the screen. Different types of displays have different requirements for refresh rate. For LCD, a refresh rate above 60Hz is best. If the refresh rate is below this value, the audience will feel the screen flickering. The faster the refresh rate, the better the visual perception of the image.
7. Resolution
Resolution is one of the most important technical indicators of a monitor, and the higher the resolution, the better the display effect. However, the pixels of a liquid crystal display are composed of arranged rows and columns. The number of pixels in each row and column is set and specified by the manufacturer, so the resolution of the LCD cannot be adjusted arbitrarily.
Shenzhen Ruxin Electronics Co., Ltd. was established in 2009 and is a professional LCD display screen manufacturer. We provide customized bar LCD screens, bar screen advertising machines, high brightness LCD screens, industrial control screens, and small-sized LCD screens. The main products include LCD long strip screens, outdoor high brightness screens, high brightness strip screens, shelf strip screens, bus strip screens, subway guide screens, in car LCD screens, advertising machine digital signs, etc.