As the name suggests, automotive LCD monitors use LCD screen, compared to traditional CRT monitors, automotive LCD monitors have obvious technological advantages. Due to the drop in LCD prices in 2008, the current automotive LCD monitors have completely replaced the traditional CRT monitors.
Auto LCD has the following excellent properties: low volume, light, completely flat, low consumption, no glare and no distortion Before choosing a car LCD, we need to consider the main parameters.
1. Point height
Dot Pitch refers to the distance between two adjacent pixels on the screen. When the screen size is set, a display with a smaller dot height will show a sharper and more detailed image. Point height information is generated by the visible area divided by the resolution. For conventional LCD screens, a height of 0.279 mm can be provided for automotive LCD monitors that usually use a CF card. A player or car hard disk player, the field can meet all requirements, so this parameter is ignored when it comes to car LCD monitors.
Resolution is one of the most important parameters when purchasing a budget monitor for 3d modeling. The better the photo, the better. Since automotive LCD monitors are usually small in size, they are good LCD monitors when the resolution reaches 720×480.
The maximum brightness of the car LCD monitor is mainly determined by the light. Currently, the brightness of the LCD monitor is 250~500cd/m2. The higher the brightness, the higher the brightness. The picture becomes more beautiful. But the price is also rising, usually a screen with a brightness lower than 250cd/m2 is not worth considering.
4. Contrast Ratio
Contrast ratios are very important in a car LCD screen. The image becomes more saturated and more stereo. On the other hand, the lower it is, the worse and duller the colors are. As a general rule, the ideal contrast ratio is greater than 200:1, and the higher the ratio, the closer to 400:1. If it’s less than 150:1, don’t choose.
Perspective refers to the maximum angle that the human eye can see. The smaller the viewing angle, the better the beer. The image will be distorted if the user’s eyes deviate slightly from the screen, even if you cannot see the image. The ideal viewing angle for automotive LCD monitors is greater than 120 degrees (horizontal) and a vertical viewing angle greater than 70° . Given the price, LCD monitors are often designed with this viewing angle in mind. View higher 75° and lower view 55° if we have it. Do not let the technical process continue. This type of screen loses a higher viewing angle. And at the same time, the bottom view simply cannot meet the requirements, so the car’s LCD monitor must face down to meet the requirements of the car’s environment.
6. Response time
This parameter is important because it determines whether there is a tail phenomenon. Response time refers to the time it takes for the LCD screen to go from bright to dark or vice versa. In general, the shorter the response time, the better. If the response time is short, people will not experience blurriness or tracking when watching moving images. Depending on the reaction time of the eye, there will be slow animations if the reaction time exceeds 100 ms. Currently, standard response times are between 50-80 ms and some high-end LCDs have response times of 25-30 ms. There will be no tailing if the response time is 80 milliseconds, it is worth noting that the response time includes the rising and falling time. Although some manufacturers only indicate the rise or fall time. that can mislead users
Color brightness is the most important parameter when choosing a car LCD monitor. Nature consists of three primary colors: red, green and blue. The color of each individual LCD pixel is determined by three primary colors. Most primary LCD colors up to 6 digits, or 64 kinds of performance indicators. colored. 64×64×64=262144 Most LCD types have only 262,144 colors, even high-quality colors. The 32 digits (16,777,216) listed by the manufacturer are derived from approximation or distance algorithms that are worse than the actual 32 digits. a lot. The screen can display good colors when it reaches 26m.
The above are some of the important parameters when choosing an LCD, and of course there are other parameters and methods. However, when you check the quality of the display, you can get a satisfactory LCD product if you consider the above 7 basic parameters.