COG Small-Size · Chip on Glass

COG Small-Size LCD Modules for Character & Graphic Displays

Chip-on-glass monochrome modules from character 8×2 to 40×4 and graphic 96×64 to 320×240, driven by the ST7565 / ST7567 family — the lowest-cost small display construction we manufacture, rated from -30 to +85°C.

8×2–40×4character formats

96×64–320×240graphic resolutions

-30~+85°Cwide temperature grade

500 pcsminimum order quantity

Chip on Glass

The smallest screens, bonded directly to the glass

In a COG module the driver IC is bonded straight onto the LCD glass with anisotropic conductive film (ACF) — no interposer PCB, no flex-to-IC socket. That removes a full assembly step and its cost, which is why COG is the standard construction for displays under about 3 inches. We run COG lines inside a Class 1000 cleanroom, so bond alignment holds to ±0.05 mm run after run.

Construction	Chip on Glass — IC ACF-bonded to the LCD glass
Character formats	8×2 to 40×4 (5×8 dot fonts)
Graphic resolutions	96×64 / 128×32 / 128×48 / 128×64 / 128×128 / 240×160 / 320×240
Display modes	STN / FSTN / TN, positive or negative image
Backlight	Yellow-green / gray / blue / white LED
Temperature	-30~+85°C wide-grade option
Connectivity	FPC tail / metal pin / zebra elastomer
Interfaces	8-bit parallel · SPI · I2C
Driver ICs	ST7565A / ST7567 / NT7534 / SSD1306
Power draw	µA-level standby; roughly 1–3 mA active
MOQ	500 pcs; samples in 7–15 days

Monochrome COG LCD modules, a 16×2 character and a 128×64 graphic with blue backlight, arranged on a lab bench

Character & Graphic Range

Thirteen stocked formats, one COG line behind them

Every row below is a live product we tool, stock and repeat — not a catalog idea. The 128×64 graphic is our most-ordered COG panel worldwide; character formats share the same glass supply chain, so a mixed BOM ships in one lot.

COG character and graphic range — format, optics, backlight, interface and controller
Format	Type	Resolution	Mode	Backlight	Interface	Controller / Driver
8×2	Character	5×8 dots	STN positive	Yellow-green	Parallel · SPI	HD44780-compatible
16×2	Character	5×8 dots	STN positive	Yellow-green	Parallel · SPI	HD44780-compatible
16×2	Character	5×8 dots	STN negative	Blue	Parallel · SPI	HD44780-compatible
20×4	Character	5×8 dots	STN positive	White	Parallel · SPI	HD44780-compatible
40×4	Character	5×8 dots	STN negative	Blue	Parallel · SPI	HD44780-compatible
96×64	Graphic	96×64	FSTN transflective	Sunlight	SPI · I2C	ST7565A
128×32	Graphic	128×32	STN positive	Yellow-green	SPI · I2C	NT7534
128×48	Graphic	128×48	FSTN	White	SPI · I2C	NT7534
128×64	Graphic	128×64	FSTN transflective	Sunlight	SPI · I2C · 8-bit	ST7567
128×64	Graphic	128×64	STN negative	Blue	SPI · I2C	ST7567
128×128	Graphic	128×128	FSTN	White	SPI · I2C	ST7565A
240×160	Graphic	240×160	FSTN	White	SPI · I2C	NT7534
320×240	Graphic	320×240	FSTN	White	SPI · 8-bit	ST7567

COG Construction

One bond fewer, one failure mode fewer

The cutaway shows the full COG stack: LCD glass, driver IC bonded through ACF, the FPC tail, and the backlight behind. ACF bond lines run at 40–60 µm pitch, and every bond is AOI-inspected before the module moves on. Because the IC sits directly on glass, there is no interposer to misalign and no connector to fatigue — the mechanical weak points of larger modules simply do not exist at this scale.

Cutaway diagram of COG construction: glass, driver IC bonded on glass via ACF, FPC and backlight layers

Applications

Where small COG screens earn their keep

Four application families dominate our COG volume. Each runs a dedicated engineering program — optics, temperature grade and supply horizon tuned to the duty cycle.

Industrial Instruments

Power meters and counters run 128×64 graphics at -30~+85°C with a transflective display that keeps reading under factory light.

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Home Appliances

16×2 character COG for ovens and washing machines — µA-level standby and a 20K+ hour backlight that outlives the appliance.

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EV Chargers & Outdoor

Transflective 128×64 panels hold full contrast in direct sun and keep operating across -30~+85°C at the charging pole.

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Medical & Diagnostic

Battery-powered meters benefit from µA standby; 5–10 year supply programs keep the panel matched to the device life.

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FAQ

COG questions we answer every week

Four short answers to the most common COG procurement questions. Anything else — send it with your drawing and we reply within 48 hours.

Chip on Glass — the driver IC is bonded directly to the LCD glass with anisotropic conductive film, removing the PCB and its connector. It is the lowest-cost construction for small monochrome modules under about 3 inches, which is why our character and graphic line from 8×2 to 40×4 and 96×64 to 320×240 is built this way.

The 128×64 graphic driven by an ST7567 — the default panel for meters, handheld instruments and industrial front panels. We stock it in FSTN transflective and blue negative optics, with SPI, I2C or 8-bit parallel interfaces.

Yes. Transflective versions reflect ambient light through the pixel layer, and with the -30~+85°C wide-grade option they suit outdoor meters, EV chargers and vehicle-mounted panels. A yellow-green LED backlight covers dusk and night operation.

500 pcs for standard formats. Samples ship in 7–15 days and mass production runs 20–35 days, FOB Shenzhen. Custom dot matrices, pinouts and FPC lengths are quoted with transparent NRE.

Start a Quote

Send the format, the optics and the volume — we will return a drawing and a price.

Character 8×2–40×4, graphic 96×64–320×240, any backlight color, any interface. MOQ 500 pcs, samples in 7–15 days, quoted within 48 hours, FOB Shenzhen, CIF or DDP.

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