Electronic ink screen is a display device based on electrophoretic display technology, which achieves image display by controlling the movement of charged particles. Compared with traditional LCD screens, its biggest features are low power consumption, strong eye protection, and the ability to maintain the image after power failure. NFC ink screen belongs to a special type in this field. By integrating near-field communication function, it can achieve wireless interaction with mobile phones and other devices, and is commonly used in dynamic information display scenarios. The three color electronic ink screen further expands its color expression based on this technology, supporting four color displays of black, white, red, and yellow, providing a richer visual hierarchy for information display.
1、 Technical principles and core parameters:
The core of the three color electronic ink screen is composed of an array of microcapsules, each containing positively charged white particles and negatively charged black particles, which are controlled by an electric field to achieve black and white display. Red and yellow are achieved by adding charged particles of corresponding colors to the capsule. The screen adopts a 3.7-inch TFT substrate with a resolution of 240 (H) × 416 (V) and a pixel pitch of 196 μ m, ensuring the clarity of text and graphics. Its viewing angle is close to 180 degrees, and it can be read under natural light without backlight, consuming only a small amount of power when refreshing the image.
2、 Functional features and design advantages:
Compared to traditional monochrome e-ink screens, the three color version introduces two auxiliary colors, red and yellow, to highlight key information such as notification icons and status indicators. For example, in the phone case application, black is used for background, white displays text, red marks unread messages, and yellow indicates battery status. The screen weighs only 8.9 grams, has a thickness of 0.9 millimeters, and supports 3-wire or 4-wire SPI interfaces, making it easy to integrate into various devices. The addition of LED backlight allows it to function normally in low light environments, but the backlight brightness cannot be adjusted, and the design focuses more on the stability of basic functions.
3、 Usage scenarios and operation methods:
This screen is mainly aimed at electronic devices that require low-power display, such as e-book readers, smart tags, industrial instruments, etc. In the phone case application, users can trigger screen content updates through NFC functionality, such as displaying the day's schedule, weather, or custom patterns. Due to the lack of support for touch operations, all interactions must be completed through accompanying devices. During installation, attention should be paid to aligning the interfaces to avoid damage to the microcapsules caused by static electricity. If residual images appear after long-term use, they can be cleared through the full screen refresh function, but frequent refreshes will slightly increase power consumption.
4、 Technical comparison with ordinary display screens:
Traditional TFT LCD screens rely on continuous power supply to maintain the image, and are prone to reflection under strong light; Although OLED screens emit light on their own, there is a risk of screen burn-in. The three color electronic ink screen combines the low-power characteristics of static display with the ability to distinguish multi-color information, making it particularly suitable for scenarios that require long-term display of static content and high battery life requirements. Its disadvantage is a low refresh rate (usually below 10Hz), which is not suitable for playing dynamic videos, but it has significant advantages in displaying static information such as text and charts.
0 comments