A VA LCD (Vertical Alignment Liquid Crystal Display) is a type of LCD technology where liquid crystals are naturally aligned vertically to the glass substrate when no voltage is applied. This alignment blocks light from passing through, creating deep black levels. When a voltage is applied, the crystals tilt, allowing light to pass through and create the desired image.

VA LCDs are known for their excellent contrast ratios, better color reproduction, and improved viewing angles compared to older LCD technologies like TN (Twisted Nematic).

Detailed Parameters:

High contrast: The background color of the VA LCD screen is extremely dark like ink, with a very high black-white contrast ratio. This enables the display content to be clearer and more eye-catching. It has a very good effect for displaying various parameters and status indicators on the electro-acupuncture device, making it convenient for users to read.

Display mode: There are usually modes such as negative display and positive display available for selection. In a black electro-acupuncture device, the negative display mode may be used, that is, a black background with white characters. This makes the display clearer visually, especially in environments with complex lighting, allowing users to easily read the displayed content. Technical Specifications

Working Voltage: The normal working voltage is generally between 2.7V and 5.0V. The 4.8V you mentioned is within the common working voltage range, which can ensure the stable operation of the display.

Working Temperature: The temperature range it can adapt to is wide, usually from -20℃ to 70℃. This enables the electro-acupuncture device to display relevant information normally in different environmental temperatures.

Resolution: The resolution of different models of 4.8V VA liquid crystal module LCM may vary. Common resolutions include 240×128, etc. You can choose them according to specific application requirements and the complexity of the display content.

Structure and Connection

Connection Method: Common connection methods include metal pin feet, conductive rubber strips, heat-pressed zebra paper, FPC (flexible printed circuit board), etc. This facilitates connection with the main control circuit of the electro-acupuncture device and realizes signal transmission and power supply.

Component Structure: It is mainly composed of liquid crystal panels, driving ICs, backlight modules (if necessary), and connectors, etc. Among them, the driving IC is responsible for controlling the arrangement of liquid crystal molecules to achieve image display; the backlight module provides light source for the display in dim environments to ensure the visibility of the display content.

Advantages and Applications

Advantages: Besides high contrast and wide viewing angle, VA liquid crystal modules also have the characteristics of stable display effect and being less susceptible to external interference, and can work stably for a long time in medical equipment, providing reliable display support for the electro-acupuncture device.

Applications: Due to its good display performance, it is often used in the medical device field, such as electro-acupuncture devices. It can be used to display treatment parameters, working status, operation prompts, etc., helping medical staff or patients accurately understand the operation of the equipment.