- - - - - - - Problem statement---------------

Life size displays are shown in korean metros for virtual shopping.

Shopper need to use QR code (/NFC) for buying specific items.

This needs lot of real estate (wall area, not floor area).

- - - - - - - - - - - proposal-------------------

A round pillar (/ wall / structure) with screen (LCD/LED) which can be dynamically updated is required.

Depending on user movement direction, part of the screen (screen which user already passed over) can be updated. User virtually finds an infinite wall.

One wall for each category of products (say one for vegetables/fruits; one for grocery/staples; one for bread/bakery/dairy etc...) makes a complete shop.

Adv: QR code can be used as it was in passive displays.

DisAdv: NFC can't be used.

Only one user can use a wall at a time. (or multiple users in same direction walking can use)

- - - - - - - - - - - - Mitigation to use NFC - - - - - - - - - -

Keep fixed shelf size (irrespective of product displayed).

Keep an NFC client in each grid element.

Update NFC client information dynamically depending on product displayed.

- - -- - - - - - - Alternative way to use NFC - - - - - - - 

Instead of supplying product information to mobile,

user information can be read from mobile by NFC client behind display.

Order can be placed from display end (instead of from mobile side)

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