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7.5 inch e-Paper display in protective ABS case, black and white, NFC powered

WaveShare

WaveShare 7.5inch Passive NFC-Powered e-Paper display

SKU CH-CE4N-K4B24

A 7.5 inch black-and-white e-paper display refreshes wirelessly via NFC in five seconds without batteries or wiring

  • CPU TypeOther
  • 5 inch e-Paper refreshes wirelessly via passive NFC with no battery needed
  • Black-and-white 800×480 resolution on a 163.2×97.92 mm active area
  • 5-second refresh cycle after NFC data transfer completes
  • ABS protective case keeps the 195.84×137.68 mm panel light and durable
  • Wide >170° viewing angle with 2 grey-scale levels for clear readability

7.5-inch NFC-Powered e-Paper

The WaveShare 7.5inch Passive NFC-Powered e-Paper display is a battery-free screen that draws both energy and data wirelessly from an NFC source such as a smartphone or reader. It suits engineers, hobbyists and signage builders who need a persistent black-and-white image without wiring or periodic charging.

5-Second Refresh and Silent Operation

Updating the 800×480 pixel panel takes roughly 5 seconds once the NFC field is present, and the process consumes no stored power because the device has no internal cell. With no active electronics running between updates the display runs completely silent and adds no thermal load to its surroundings.

Protective ABS Case and Wide Viewing Angle

The module ships inside a lightweight ABS enclosure measuring 195.84mm×137.68mm, with the active area at 163.2mm×97.92mm and a dot pitch of 0.205×0.204mm. Viewing angles exceed 170°, so the image stays legible from almost any direction, though buyers who need colour output or sub-second refresh rates will need a different technology.

Highlights

  • 5 inch e-Paper refreshes wirelessly via passive NFC with no battery needed
  • Black-and-white 800×480 resolution on a 163.2×97.92 mm active area
  • 5-second refresh cycle after NFC data transfer completes
  • ABS protective case keeps the 195.84×137.68 mm panel light and durable
  • Wide >170° viewing angle with 2 grey-scale levels for clear readability

Specifications

CPU TypeOther

Questions about this item

How do I install the 7.5 inch NFC-Powered e-Paper and what step do people often miss?

Mount the display inside its protective ABS case, then bring an NFC-enabled smartphone or an NFC reader such as the ST25R3911B board close to the panel to wirelessly supply both power and data; the step users miss is holding the device steady for the full five-second refresh so the transfer completes without interruption.

What maintenance or replacement will the 7.5 inch NFC-Powered e-Paper need over time?

Because the display draws all energy wirelessly through passive NFC, there is no battery to replace and no wiring to service; the only upkeep is keeping the front surface clean and ensuring the NFC antenna area remains unobstructed for reliable power and data coupling.

What limit appears first when the 7.5 inch NFC-Powered e-Paper is updated repeatedly?

Each full refresh takes about five seconds excluding data transfer, so sustained use is constrained by that refresh interval; the display also supports only two grey levels and a 800×480 resolution, so content complexity and update frequency are the practical bottlenecks.

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