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Difficulty: EasyLaptop Display Components and Features

A technician is replacing the display components on a legacy laptop equipped with a Cold Cathode Fluorescent Lamp (CCFL) backlighting system. Which display component is responsible for converting direct current (DC) power from the motherboard into alternating current (AC) power to illuminate the backlight?

  1. Inverter boardAnswer
  2. B
    Digitizer panel
  3. C
    Wi-Fi antenna harness
  4. D
    OLED display panel

Answer

The inverter board is the component that converts low-voltage DC power into high-voltage AC power for a CCFL backlight.
In older laptop LCD screens that utilize Cold Cathode Fluorescent Lamp (CCFL) backlights, an inverter board is required to transform low-voltage DC power coming from the laptop's motherboard into high-voltage AC power to strike and light the fluorescent lamp.

Step-by-Step Solution

1
Determine the power requirements of CCFL display technology.
CCFL backlights operate on high-voltage alternating current (AC).
Fluorescent lighting tubes require AC voltage to produce light, whereas the laptop motherboard provides low-voltage DC current.
2
Identify the component that converts DC voltage to AC voltage within the screen assembly.
The inverter board performs DC-to-AC power conversion.
The inverter board acts as a power converter specifically designed to drive CCFL backlights in LCD displays.

Key Concept

Laptop CCFL Backlighting and Inverter Boards
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Topics

Laptop Display Components and Features

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