0.99 Inch Circular TFT LCD Module

ENH-TV0099A001 Description

 

I'll be honest-when you first look at the datasheet for this 0.99 Inch Circular TFT LCD Module, nothing screams "wow." But after more than a decade of making small LCDs, I've learned that the screens which cause the fewest headaches in mass production are rarely the ones with the flashiest specs. This one became our core product precisely because it's built around the headaches we've already solved for customers.

 

Let's start with the driver IC. We chose GC9107-not because it's the newest or the most hyped, but because it's proven to be exceptionally stable with circular displays. A round screen is essentially a rectangular one with a lot of pixels cut off, and if the IC doesn't handle the addressing properly, you get weird artifacts along the edges. We've seen other modules where the circle looks fine in the lab but shows ghosting or timing issues when driven by a customer's main processor. With GC9107 and its SPI interface, we've dialed in the signal timing so that it's forgiving across different host platforms. That's the kind of detail that doesn't make it into a marketing bullet point, but it saves weeks of debugging during integration.

 

The polarizer mode is normally black, transmissive. That wasn't a random choice. For applications like smartwatches, handheld medical devices, or anything with a dark UI, a normally black screen gives you deep blacks and much better perceived contrast. A normally white screen would look grayish in dark mode, which defeats the whole aesthetic. We've had customers come to us after trying a normally white circular display for their wearable, and they ended up with a product that looked washed out indoors. Switching to this mode fixed it without any hardware redesign.

 

Viewing angle is listed as "all," but that's really a shorthand for IPS. The reason we insist on full IPS for a round display is simple: a watch or a handheld device gets viewed from every possible angle-while running, while sitting on a table, while tilted in a charging dock. If the colors shift or the contrast inverts at off-angles, users perceive it as cheap. We've done internal comparisons with other small circular panels that use TN or even lower-grade IPS, and the difference in real‑world usability is huge.

 

The backlight uses two white LEDs, 40mA total at 3.0V. That's a deliberate balance. We could push it to 500 cd/m² or more, but for battery-powered wearables, every extra milliamp matters. At 350 cd/m² typical luminance, it's bright enough to be readable under direct sunlight (we've tested it on sunny days outdoors), while still keeping power draw reasonable. If a customer really needs higher brightness for an outdoor industrial terminal, we can tune it-but the baseline is chosen for the majority of use cases, which are battery‑sensitive.

 

Then there's the mechanical side. The tolerance is ±0.2 mm for unmarked dimensions. That might sound tight, but after years of dealing with assembly line complaints, we learned that if the FPC alignment is off by even half a millimeter, automated pick‑and‑place machines can struggle, or the display might sit slightly crooked in the housing. We actually revised our cutting process twice to get the circle geometry consistent enough that the active area is perfectly centered. And we've eliminated the pixel "jaggies" along the curved edge that you sometimes see on cheaper round screens-it's a matter of how the glass is shaped relative to the pixel matrix.

 

Operating temperature is -20°C to 70°C, storage -30°C to 80°C. Those numbers come from real shipping and field failures. We once had a batch that went through a winter logistics chain in northern Europe; the modules were fine, but the supplier's FPC stiffened up at low temperatures and caused intermittent contact. That's why we now validate the whole assembly, not just the glass.

 

As a factory that actually makes these, we don't just ship a standard module and walk away. FPC customization-length, shape, connector type, pin assignment-is something we do regularly. Because in many embedded products, especially wearables and handheld medical devices, the motherboard layout is extremely tight. A standard FPC often forces a compromise in the industrial design. We can adapt it so that the display drops into the housing without awkward bends or added flex cables.

 

The same goes for cover glass integration. We can optically bond a custom cover glass, with or without touch, directly to the module. That not only improves durability and optical clarity, but it also simplifies assembly for the customer-they get a finished display assembly instead of having to manage lamination themselves.

 

All modules go through 100% inspection and a 24‑hour high‑temperature burn‑in per batch. I've seen too many "cheap" displays that pass initial testing but fail after a few weeks of use in the field. The burn‑in is our way of catching early‑life failures before they become someone else's field return problem.

 

So yes, on paper this is a 0.99 Inch Circular TFT LCD Module with numbers that look similar to many others. But the difference is in how we arrived at those numbers and what we've done to make them work reliably in real products. After all these years, I'm convinced that a screen's real value isn't in its peak specs-it's in how little trouble it causes when you're trying to ship a product.

 

 

 ● OEM&ODM             ● NO MOQ                ● SAMPLES IN STOCK              ● TESTING BOARD OPTIONAL

 

 

 

 

                                                           

 

 

 

SPECIFICATIONS

ITEM	DIMENSION	UNIT
Size	0.99	inch
Outline Dimention	26.71x26.22x1.86	mm
Operating Temperature	-20°- +70°	°C
Storage Temperature	-30°- +80°	°C
Resolution	128x115

 

 

 

Hot Tags: 0.99 inch circular tft lcd module, manufacturers, suppliers, factory, customized, cheap phone screen protectors, lcd display unit, lcd screen touch, lcd screen working principle, lvds touch screen, tft lcd touch