Can EP1331G be customized and sampled?

Yes. EYA Display is an in-house factory and supports customization of size, interface, touch and brightness, and provides samples.

EP1331G 1.28-inch Round TFT LCD Display 240x240 SPI

🔍 Click image to enlarge

EP1331G 1.28-inch Round TFT LCD Display 240x240 SPI

Name: EP1331G 1.28-inch Round TFT LCD Display 240x240 SPI
Brand: EYA Display
SKU: EP1331G
Availability: InStock

1.28" 240x240 SPI

The EP1331G is a 1.28-inch round IPS display with a full viewing angle, 240×240 resolution and RGB565 data format, driven by the GC9A01 controller over a 4-wire SPI interface, with a full iron frame for protection.

Outline 35.60 × 37.74 × 2.2 mm, active area 32.4 × 32.4 mm, pixel size 0.135 mm, 16-pin FPC on 0.5 mm pitch with a plug-in connection. Operating temperature -20 to 70 °C, storage -30 to 80 °C, RoHS compliant.

Model	EP1331G
Size	1.28 inch
Resolution	240x240
Interface	4-wire SPI
Driver IC	GC9A01
Viewing angle	Full viewing angle
Touch	No
Pin count	16pin
Pin pitch	0.5mm
Connection	Connector
Outline (W×H×T)	35.60 (W) × 37.74 (H) × 2.2 (T) mm
Active area	32.4 (W) × 32.4 (H) mm
Pixel size	0.135 (W) × 0.135 (H) mm
Data format	RGB565
Operating temperature	-20℃~70℃
Storage temperature	-30℃~80℃
Backlight	2 white LEDs in parallel
Brightness	400cd/m²

📄 Request documents Quote / Sample

Category: TFT LCD Displays & Modules

Specifications

Detailed specifications

What these numbers mean

400 cd/m² luminanceClearly readable under normal indoor lighting; choose a high-brightness model for direct sunlight or outdoor use.
4-wire SPI interfaceFew pins and simple routing, suited to small and medium sizes with limited host resources; use RGB / MIPI for high-resolution larger panels.
240×240 resolutionGood for icons, gauges and simple UI; not intended for text-dense or multi-column layouts.
Operating temperature -20 to 70 °CCovers most indoor and general industrial environments; choose a wide-temperature model beyond that.
TouchThis model has no touch panel; choose a touch model or request customisation if you need touch.

Basic description

Item	Specification
Product name	1.28 inch IPS full viewing angle high-definition display
Display mode	Transmissive
Display format	240 x RGB x 240 dot matrix
Data format	RGB565
Colours	65K colours
Interface type	4-wire SPI
Viewing direction	Full viewing angle
Driver IC	GC9A01
Construction	Full iron frame protection

Mechanical specifications

Item	Specification
Outline dimensions	35.60 (W) * 37.74 (H) * 2.2 (T) mm
Resolution	240 RGB * 240 dots
Active area	32.4 (W) * 32.4 (H) mm
Pixel size	0.135 (W) * 0.135 (H) mm

The thickness given for the outline dimensions excludes the FPC and double-sided tape.
Drawing tolerance note: GENERAL TOLERANCE ±0.20

Electrical & environment

Item	Specification
IO voltage IOVCC	1.8–3.3 V
Analog voltage VCC	2.8–3.3 V
Operating temperature TOPR	-20°C to 70°C
Storage temperature TSTR	-30°C to 80°C
Environmental compliance	ROHS

IOVCC and VCC may be tied together and powered from a single 2.8–3.3 V supply.
When VCC is 3.3 V, VCC, IOVCC and LEDA (backlight anode) may share the same supply rail.
Module_VCC is the display power supply pin; LCD_IOVCC is the I/O power supply pin.

Brightness & power

Item	Symbol	Min	Typ.	Max	Unit
LED backlight forward voltage	VLED	2.9	3.0	3.1	V
Per-LED typical current	IF	-	15	-	mA
Total backlight current	ILED	-	90	-	mA
Display surface luminance	LS	-	400	-	cd/m²
LED backlight uniformity	LD	80	-	-	%
Total display power consumption	PLCD	-	0.386	-	W

PLCD = VCC × ILCD + VLED × ILED.
The backlight uses 2 white LEDs connected in parallel: 15 mA typical per LED, 90 mA typical in total. A current-limiting circuit (typically a resistor of about 4.7 Ω) is required; overheating from prolonged operation can permanently damage the display and backlight.

Response time & contrast

Item	Symbol	Condition	Min	Typ.	Max	Unit
Response time	Tr+Tf	θ=0°	-	30	35	ms
Contrast ratio	CR	θ=0°	-	1200	-	-

Viewing angle

Direction	Condition	Min	Typ.	Unit
12 o'clock	CR≥10	75	80	deg
6 o'clock	CR≥10	75	80	deg
9 o'clock	CR≥10	75	80	deg
3 o'clock	CR≥10	75	80	deg

The 3, 6, 9 and 12 o'clock directions follow the conventional clock-face definition. The viewing angle is at its maximum in every direction, with no dead zone.

Pin definition (16 pins / 0.5 mm pitch)

1 Module_GND Display ground

2 LCD_IOVCC Display I/O power supply, 1.8–3.3 V

3 LCD_SPI_MISO SPI serial data output

4 LCD_TE Frame sync signal for camera synchronisation; leave floating if unused

5 LCD_SPI_MOSI SPI serial data input

6 LCD_SPI_DCX Command/data select: DCX=1 selects display data or register parameter; DCX=0 selects register command

7 LCD_SPI_SCLK SPI serial clock

8 LCD_SPI_SS Driver IC chip select, active low

9 LCD_RST Display reset, active low

10 Module_VCC Display power supply, 2.8–3.3 V

11 ~ 14 NC No connection (all four pins unconnected)

15 Backlight_LEDA Backlight anode, 3.0–3.3 V, typical 3.1 V

16 Backlight_LEDK Backlight cathode; connect to ground through a current-limiting resistor when dimming is not required

A current-limiting resistor must be fitted on the backlight anode or cathode; overheating from excessive current permanently damages the display.
Whether in parallel or SPI serial mode, display data is always transferred MSB first.

Reliability test

No.	Test item	Test conditions
1	High temperature storage	80°C × 120 hours
2	Low temperature storage	-30°C × 120 hours
3	High temperature / high humidity storage	60°C × 90%RH × 120 Hrs
4	High temperature operation	70°C × 72 hours
5	Low temperature operation	-20°C × 72 hours
6	Thermal cycling storage	-20°C (30 min) ~ 25°C (5 min) ~ 70°C (30 min), 10 cycles

After a reliability test the display must rest at room temperature for 2–4 hours before power is applied, otherwise it will be permanently damaged.
After each test the samples must show no bubbles in the module, no seal loosening, no non-display, no missing lines, no glass breakage, and Idd no greater than twice its initial value.

Highlights

Highlights & Applications

Key features

Round active area — suited to knob displays, gauges, wearables and decorative formats
IPS full viewing angle: 75–80° in all four (3/6/9/12 o'clock) directions with no dead zone
400 cd/m² surface luminance, 1200:1 contrast and 30 ms response — clear indoors
SPI interface with the widely used GC9A01 driver; abundant reference material and sample code
Full iron frame gives better mechanical strength and assembly consistency than a bare panel
Customisable: luminance, touch, FPC length and pin definition, cover glass and bonding

Typical applications

Smart-home knob displays, thermostats and central control panels
Round display UI for wearables and portable instruments
Appliance front panels in knob or dial form
Round indicators on industrial instruments and handheld devices

Not sure whether it fits? Tell us your environment and host platform and an engineer will confirm.

Ordering & Support

Lead time	Standard models ship in 3–7 days from stock; custom models take 7–15 days for samples; volume orders are scheduled on confirmation
MOQ	Standard models support small trial batches; custom projects depend on tooling and material commitment
Samples	Samples available for standard models; custom samples take 7–15 days
Customisation	Size, resolution, luminance, interface, touch (capacitive / resistive), FPC length and pin definition, construction (posts / iron frame), cover glass and bonding, firmware and UI
Certification	National High-Tech Enterprise · ISO9001 certified · CE / FCC / RoHS reports available on request
Technical support	Schematic review, timing confirmation, driver debugging and UI development support; datasheets (PDF) and driver code published on most product pages, with schematics included in the example projects
Packaging	Custom blister trays with foam separators between trays; units per carton are determined by the size and shape of the product. Thick foam protects every side inside the carton, suitable for long-distance transport and repeated handling.
Warranty	One-year warranty to industry standard. Our quality and after-sales team analyses every defective unit: where the cause is ours, we correct it in subsequent production so it does not recur.
Long-term supply	Long-term supply commitments available for industrial projects, assessed against the product lifecycle
Export	Exporting to Europe, the US, Japan, Korea and Southeast Asia; we can help arrange international logistics and export documents

Request a quote / sample More FAQs

FAQ

Frequently asked questions

Do you support customisation and samples?

Yes. EYA is our own factory and can customise size, interface, luminance and touch, and we provide samples.

What is the MOQ and lead time?

Standard models ship in 3–7 days from stock; custom models take 7–15 days for samples. Please contact sales for volume orders.

Can you provide datasheets and driver material?

Datasheets (PDF), driver code and complete example projects (schematics included) are published on most product pages and can be downloaded directly. For anything not listed, tell us the model and we will send it.

What certifications do you hold?

ISO9001 quality management certification and National High-Tech Enterprise status; CE / FCC / RoHS reports available on request.