POS Terminal 2.25 Inch 76x284 TN TFT Bar Display ST7789P3 4-SPI 600 Nits Cashier Screen

A point of sale display works in a hostile optical environment: shop lighting overhead, a cashier's hand, a card terminal, and a customer reading from a metre away. This 2.25 inch module answers with a transmissive TN TFT and a 600 nit backlight. Each pixel is a cell switched by a transistor and held by a capacitor; four white LEDs supply light through an RGB filter, so a downlight that washes out a dim screen leaves this one legible. The 76x284 stripe on a 14.7972 x 55.2948 mm area is the shape of a price column, and the 12 o'clock viewing direction is aimed at a cashier standing at a counter rather than at a customer across it.

Cashier displays show a line item and a running total. Customer poles show a total and a payment state. Self checkout kiosks show a scan confirmation. Queue terminals show a number and a counter. Fuel dispensers show a volume and an amount. Each is glanced at mid-task and must read in a lit shop without leaning in.

The bar layout matches the transaction: three or four lines of item, price and total fit a narrow pole housing that would clip a square module. 600 nits is the practical threshold for a counter under a track light, where lower panels read grey and a cashier turns up the contrast until the graphics break. The single ST7789P3 platform keeps firmware identical across a terminal family, and the 4-SPI ribbon tolerates the tight bends inside a swivel mount better than a parallel bus.

The module shows item lines, totals, payment states and 65K colour highlights, takes 4-SPI data, supports windowed updates so a total changes without repainting the list, and dims through PWM for a dimmed evening mode. Frame memory in the controller means a terminal can blank the backlight between transactions and restore the last screen instantly when the next sale starts.

Bring-up: mount behind the pole lens, connect the ribbon through the swivel with a service loop, apply 3.3 V, reset, load the ST7789P3 table for 76x284, then enable the backlight. Verify the reading with the pole at both ends of its travel, since a ribbon that is tight at one extreme will fail first at the connector, and confirm the total field is legible from the customer side under the shop's actual lighting.

Cashier environments bring cleaning sprays, so keep solvents off the polariser edge and wipe with a damp cloth only. Keep within -20 to +70 C, avoid pinching the ribbon in the swivel, and never press on the glass to seat the lens. A panel that flickers when a card terminal is placed next to it usually has a grounding problem in the pole, not a display fault.

Production ships within 5-10 working days after payment. Pilot terminals go by express, fleet rollouts by air or sea, and capacity of about 100,000 pieces per month supports staged store deployments.

T/T, L/C at sight and Western Union are accepted. Trial orders are prepaid, and fleet volumes run on a deposit plus balance against shipping documents.

Modules ship with protective film, in anti-static trays with foam slots, sealed in a moisture barrier bag inside an export carton labelled per model and quantity for site splitting.

Minimum order is 10 pieces, enough to equip a pilot store. Transit damage is replaced after photo verification, a 12 month warranty applies, and our engineers help with swivel ribbon routing and initialization.