Laptop structure

Laptop computer structure

1. Shell:

The shell is not only beautiful and outward-looking, but also suitable for desktop computers. It also plays a protective role in internal components. The more popular shell materials are: engineering plastics, magnesium-aluminum alloy, and carbon fiber composite materials (carbon fiber composite plastic). Among them, the shell of carbon fiber composite material combines the low density and high ductility of engineering plastics with the rigidity and shielding properties of magnesium-aluminum alloy, making it an excellent shell material. The shell material indicated by general hardware suppliers refers to the upper surface material of the notebook computer. Engineering plastics are generally used for the hand rest and bottom.

2. Liquid crystal screen (LCD):

Laptops have used LCD screens as their standard output devices since their inception. The categories are roughly: STN, thin film transistor liquid crystal display ( TFT) etc. Today's more excellent civilian-level LCD screens include SHARP's "Ultra Black Crystal" and Toshiba's "Low Temperature Polysilicon", both of which are thin film transistor liquid crystal display (TFT) LCD screens. In addition to the screen, the light-emitting device of the LCD screen is also very important. Poor-quality lamps will cause the color temperature deviation of the LCD screen to be very serious (mainly yellowing or redness).

3. Processor:

The processor is the core device of a personal computer, and laptops are no exception. Unlike desktop computers, notebook processors not only take into account performance indicators such as speed, but also take into account power consumption. Not only is the processor itself a large energy consumer, but the energy consumption of the laptop's overall cooling system, which increases due to the increase in processor temperature, cannot be ignored.

4. Heat dissipation system:

The heat dissipation system of a notebook computer consists of heat conduction equipment and heat dissipation equipment. The basic principle is that the heat conduction equipment (heat pipes are generally used now) concentrates heat to the heat dissipation equipment ( Nowadays, heat sinks and fans are generally used, and there are also models using water cooling systems). A little-known cooling device is the keyboard. The keyboard will also dissipate a lot of heat between typing.

5. Pointing device:

Laptops are generally equipped with a set of pointing devices (equivalent to a mouse on a desktop computer). There are also models equipped with two sets of pointing devices. ). In the early days, trackballs were generally used as positioning devices. Nowadays, touchpads and pointing sticks are more popular.

6. Laptop hard drive:

The performance of the hard drive has a crucial impact on the overall performance of the system. The bigger the hard drive, the better. Because the larger the hard drive, the longer it takes to search for data. Current mainstream laptops are generally equipped with larger-capacity hard drives to ensure sufficient space for mobile office work. For users who need to frequently access the Internet on the go, a hard drive of this capacity should be enough to store a large amount of hard drive buffers and downloaded software. However, if you need to replace a desktop computer with a laptop, or if you do not have any backup devices, such as CD-RW or ZIP, etc., if you often produce some multimedia presentation files, due to sound, image animation, etc. Files require a large amount of hard drive space. In this case, you can choose a hard drive with a capacity of 250GB or 320GB. Of course, if you pay great attention to hard drive performance, you can choose the more powerful terabyte-level ultra-large capacity hard drive.

Due to limitations in factors such as heat generation, power consumption, and volume, the rotation speed, continuous transfer speed, and random transfer speed of laptop hard drives are lower than those of desktop hard drives. The current hard drive speed of mainstream desktop computers is 7200rPm, but the hard drive speed of laptops is still mainly 5400rpm. Although 7200 rpm notebook hard drives have been available on the market for a long time, they have not been very popular due to price factors.

Lithium batteries are currently the mainstream product, characterized by high voltage, low weight, high energy, no memory effect, and can be charged at any time; under the same other conditions, lithium-ion batteries of the same weight have higher The power supply time of nickel-metal hydride batteries is extended by 5%, usually more than 2 hours, and some can even reach 4 hours. The ultra-long-lasting lithium battery using the latest technology can last up to 6 to 7.5 hours on a single charge? If the second The battery can also support 3 hours, and can be used together for up to 9 to 11 hours, depending on usage, which can meet the needs of mobile office all day long. Mid-range and high-end laptops are equipped with this kind of battery.

7. Sound card

Previous laptops generally used 16-bit sound cards, and there were also 32-bit ones. But the difference in their acoustic effects is not something ordinary ears can hear. Therefore, a laptop with a 16-bit sound card is fully suitable for general office work and entertainment.

8. Graphics card

Graphics cards are divided into integrated and independent graphics cards

Integrated graphics cards have display chips, video memory and related circuits all built on the motherboard and integrated with the motherboard; integrated graphics cards have separate display chips, but now most of them are integrated into the Northbridge chip of the motherboard; some The graphics card integrated on the motherboard also has video memory installed separately on the motherboard, but its capacity is small. The display effect and processing performance of the integrated graphics card are relatively weak. The graphics card cannot be hardware upgraded, but the frequency can be adjusted through CMOS or a new BIOS file can be flashed. Implement software upgrades to tap the potential of the display chip; the advantages of integrated graphics are low power consumption and low heat generation, and the performance of some integrated graphics can be comparable to entry-level independent graphics, so there is no need to spend additional money to purchase a graphics card.

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