COMPUTER MONITOR

 

    A Computer monitor can be defined as the hardware device of a computer that is responsible for displaying the supplied processed data on the screen. It basically consists of a display device circuitry, casing, and a power supply. This display device that is used can be a thin film transistor -liquid crystal display (TFT-LCD), LED display, or CRT (used by older computers) These monitors are connected to the computers using connectors such as HDM, Display port, Thunderbolt, etc.

The Specifications of a Computer  monitor are as follows:

1. Screen size

2. Aspect ratio

3. Resolution

4. Response time

5. Power consumption

1. Screen Size

    Screen size refers to the size of the screen that is actually visible, It is determined by measuring it from one comer to another comer diagonally. There are monitors available in variable sizes and each one of them has theirs over aspect ratio and resolutions.

2. Aspect Ratio

    The aspect ratio can be defined as the ratio of horizontal resolution to the vertical resolution of an image. It describes the ratio of an image with respect to its size. For example, consider a screen with a resolution of 1200x 1600. The aspect ratio of this screen will be 2:4. Depending upon the size of a monitor the aspect ratio varies.

3. Resolution

    This is an important specification of a monitor. It refers to the number of pixels. (also called dots) a screen is made up of. These pixels will be arranged horizontally and vertically over a screen. Each screen consists of a fixed number of pixels that it can accommodate. Hence care must be taken such that the picture does not exceed and cross these fixed pixels, If the image fits right in this pixel resolution then it will be clear and sharp. Some monitors also support HD Resolution (high definition) Which allows us to display high-quality pictures. There are two ways that can be used to display HD pictures, images (or) contents. They are,

(i) By using progressive scan

(i) By using an interlaced scan.

Also, the screens should have the ability to display the entire content within its native resolution by handling the progressive scan and interlaced scan. If it is not able to display the picture’s full resolution then there will be a lack of clarity in the picture. For this purpose, the user should ensure that the screen has a certain number of pixels vertically in order to display the same amount of HD content.

4. Response Time

    Response time can be defined as the time taken by a pixel to change from one color to another color. It refers to the speed at which the transition takes place and how quickly it takes place. It is measured by calculating the rise time and fall time of a single pixel. Hence, the total response time can be calculated as the sum of the rise time and fall time. The change of pixel color can be determined by using the black> white > black transition. If the response time is faster then there won’t be any difficulty of blurring while playing games (or) watching movies. But the thumb rule states that it is better if the response time is low. The response time can be graphically shown as follows Power Consumption

Power consumption refers to the amount of electricity a particular model of the monitor would consume when it is On. There are three things that have a direct impact on the consumption of a monitor. They are,

(i) Brightness and backlight intensity

(ii) Backlight type

(iii) Connected peripherals.


The user should take care that not much power is consumed. This can be achieved by using ambient light sensors and human sensors.