One of the main technical indicators of a monitor is "resolution". Resolution refers to the sum of pixels that make up an image, that is, how many pixels the screen contains; it is generally expressed as the product of horizontal resolution (the number of pixels in a scanning line) and vertical resolution (the number of scanning lines). The higher the resolution, the more pixels the picture contains, and the more detailed and clear the image is.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
One of the main technical indicators of the monitor is ()
A. Resolution
B. Brightness
C. Color
D. Contrast
Correct answer:A
Answer analysis:The main characteristics of the display are: pixel and dot pitch, resolution .
The display (display) is also often called a monitor. The monitor is an I/O device of the computer, that is, an input and output device. It is a display tool that displays certain electronic files on the screen through a specific transmission device and then reflects them to the human eye. It can be divided into various types such as CRT and LCD.
Technical parameters:
Resolution
Resolution (Resolution) refers to the sum of pixels that make up the image, that is, the number of pixels contained on the screen. It is generally expressed as the product of horizontal resolution (the number of pixels in a scan line) and vertical resolution (the number of scan lines). For example, 1920×1080 means that the horizontal direction contains 1920 pixels and the vertical direction contains 1080 pixels. The total number of pixels on the screen is their product. The higher the resolution, the more pixels the picture contains, and the more detailed and clear the image is. The resolution of the display is affected by the size of the display, (pixel pitch of the picture tube), circuit characteristics, etc.
Grating pitch and dot pitch
Grating pitch refers to the distance (unit mm) between parallel gratings of a cathode picture tube. The advantage of using a cathode-type picture tube is that its grid pitch will not deform after being used for a long time, and the display will not deteriorate in image quality after being used for many years.
Dot pitch (or stripe pitch) is a very important hardware indicator of the display. It refers to the distance between a luminous point of a given color and the nearest adjacent luminous point of the same color. This distance cannot be changed by software, which is different from the resolution. At any same resolution, the smaller the dot pitch, the clearer and more delicate the displayed image, and the higher the resolution and image quality.
Bandwidth
Bandwidth is a very important parameter of the monitor, which can determine the performance of the monitor. The so-called bandwidth is the abbreviation of the display video amplifier passband width. The bandwidth of a circuit actually reflects the circuit's response speed to input signals and the resolution capability of the display. The wider the bandwidth, the smaller the inertia, the faster the response speed, the higher the signal frequency allowed to pass, and the smaller the signal distortion. The unit of bandwidth is MHz, and its value can be calculated using the formula "horizontal resolution × vertical resolution × refresh rate".
Refresh rate
The refresh rate of the monitor is divided into vertical refresh frequency and horizontal refresh frequency. Vertical refresh frequency, also called field frequency, refers to the number of times the monitor repeatedly refreshes the display screen per second, expressed in Hz. This refresh frequency is what is commonly known as the refresh rate; the horizontal refresh rate is also called the horizontal scanning trequency, which refers to the number of times the monitor scans horizontal lines per second, in kHz; the vertical refresh rate is the vertical scanning trequency. The unit of "frequency" is MHz, which is determined by the horizontal refresh rate and screen resolution. The vertical refresh rate indicates how many times the screen image is redrawn per second, which means the number of screen refreshes per second.
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