3.1-Inch Round TFT LCD · 480 × 480 · 50-Pin Parallel RGB
COM31H3P76ULC 3.1-Inch 480×480 Round TFT LCD
COM31H3P76ULC is a 3.1-inch, 480 × 480 round Blanview TFT LCD for OEM display evaluation. The reviewed configuration uses a VA normally-black a-Si TFT active matrix, 16.7-million-color 24-bit parallel RGB (8 bits per color channel) input and a 50-pin FPC. Its documented outline is 88.83 × 91.43 × 5.60 mm, with a 78.62 mm-diameter active area.
Document-control notice: this technical profile is based on specification 22TLM118, Version 0.0, issued February 15, 2023. The source is marked TENTATIVE, under development and subject to change. Use it for initial evaluation only; the controlled documents supplied during quotation or engineering review govern the design.
SuccessLCD currently accepts RFQs for COM31H3P76ULC. RFQ acceptance does not confirm stock, sample availability, MOQ, price or lead time; share your timing, enclosure, environment, quantity and project date for review.
COM31H3P76ULC Key Specifications
The values below are transcribed from the supplied model-specific source. Parenthesized source values and measurement conditions remain qualified; the quoted controlled revision takes priority.
| Model | COM31H3P76ULC |
|---|---|
| Source control | Specification 22TLM118 · Version 0.0 · Issue 2023-02-15 |
| Source status | Tentative · under development · specifications subject to change |
| Display size / shape | 3.1-inch · round |
| Resolution | 480 × 480 RGB pixels |
| Display technology | Blanview VA · normally black · a-Si TFT active matrix |
| Color / dot arrangement | 16,777,216 colors · 8 bits per RGB channel · RGB stripe |
| Host interface | 24-bit parallel RGB (8 bits per color channel) · 50-pin FPC |
| Module outline | 88.83 ±0.2 × 91.43 ±0.2 × 5.60 ±0.05 mm · FPC excluded from outline dimensions |
| Active area | 78.62 mm diameter |
| RGB-dot pitch | 54.6 × 163.8 µm · source calls this dot pitch, not square-pixel pitch |
| Reference weight | 50.0 g including FPC · parenthesized Version 0.0 source value |
| FPC direction | Downward in the source drawing view |
| Applicable mating connector | Hirose FH28D-50S-0.5SH(05) identified on the drawing · confirm orientation and current availability |
| Recommended supplies | VDD 3.0–3.6 V, 3.3 V typical · IOVDD 3.0–3.6 V, 3.3 V typical |
| Operating temperature | −30 to +85 °C panel-surface temperature |
| Storage temperature | −40 to +95 °C |
| Backlight | White LED · 14 mA typical · 18.3 V typical / 19.6 V maximum at 25 °C |
| Center brightness | 420 cd/m² minimum · 600 cd/m² typical at IL = 14 mA and 25 °C |
| Contrast ratio | 420 minimum · 700 typical at 25 °C under the source method |
| Viewing angle | 80° minimum left, right, up and down at CR ≥ 10 |
| Response time | Source table reports TON + TOFF at 50 ms maximum · confirm on the controlled revision |
| Brightness distribution | 70% minimum under the source optical measurement conditions |
Optical values are documented at VDD 3.3 V, optimized VCOMDC, backlight current IL = 14.0 mA and ambient temperature 25 °C. System readability depends on cover materials, reflections, backlight drive, temperature and viewing environment.
COM31H3P76ULC Mechanical Integration Reference
The published reference is based on specification 22TLM118, Version 0.0 (Tentative). Confirm the current controlled revision, annotated dimensions and tolerances before enclosure or PCB release.
The source identifies a 50-pin 0.50 mm-pitch FPC, Pin 1/50 direction and an applicable Hirose FH28D-50S-0.5SH(05) mating connector.
COM31H3P76ULC 50-Pin Parallel RGB Pinout
The grouped signal map below covers pins 1–50 from the published tentative specification. Confirm the current controlled revision and connector orientation before PCB release.
| Pins | Signals | Function / control |
|---|---|---|
| 1 | GND | Ground |
| 2 | BL_A | LED anode |
| 3–4 | BL_C | LED cathode |
| 5–6, 42 | IOVDD | 3.3 V nominal I/O supply |
| 7–8 | VDD | 3.3 V nominal circuit supply |
| 9–16 | R7–R0 | Red data, MSB to LSB |
| 17–24 | G7–G0 | Green data, MSB to LSB |
| 25–32 | B7–B0 | Blue data, MSB to LSB |
| 33, 37, 39, 41, 43–45, 50 | GND | Ground |
| 34 | HSYNC | Horizontal synchronization · negative polarity |
| 35, 47, 49 | NC | Open |
| 36 | VSYNC | Vertical synchronization · negative polarity |
| 38 | DE | Data enable · positive polarity |
| 40 | CLK | Data latched at the falling edge |
| 46 | STBYB | High: normal operation · Low: standby |
| 48 | RESETB | Low-active reset |
The source marks HSYNC and VSYNC with a DE-mode note: when DE mode is used, they may be fixed High or Low. Confirm final timing, contact orientation and the controlled pin assignment before PCB release. .
What to Check Before Designing In This Round TFT LCD
- Confirm the interface. The reviewed profile uses 24 RGB data lines plus CLK, DE, synchronization, standby and reset controls on a 50-pin FPC. Do not assume MIPI, LVDS, SPI, I²C or MCU-bus compatibility.
- Check voltage and timing together. VDD and IOVDD are documented at 3.0–3.6 V with 3.3 V typical. Share the host timing and logic levels for review rather than relying on pin count alone.
- Review the round mechanical stack. Compare the 88.83 × 91.43 mm outline, 78.62 mm-diameter active area, 5.60 mm thickness, lower frame/FPC extension, recesses and Pin 1 direction with the enclosure and PCB.
- Validate the backlight drive. The source lists IL = 14 mA typical and VF = 18.3 V typical / 19.6 V maximum at 25 °C. Confirm the actual driver, current regulation and thermal conditions.
- Treat Version 0.0 as provisional. Do not release tooling or production files from a browser image. Use the controlled drawing and specification supplied with the written quotation or engineering approval.
For related engineering checks, see the TFT LCD interface guide, LCD drawing and specification review checklist, FPC compatibility guide and resolution and active-area guide.
What This COM31H3P76ULC Profile Does Not Assert
The supplied technical source does not establish every commercial or current-production fact. To keep the page traceable, the following items remain intentionally unstated until supported by model- and revision-specific evidence:
- Stock, sample availability, fixed MOQ, price, lead time or delivery schedule
- Current lifecycle or final-production status
- Driver IC identity or touch-panel configuration
- Current compliance certification, reliability result, packing specification or guaranteed LED lifetime
- Automotive, medical, aerospace or other application-grade approval
Frequently Asked Questions
What is COM31H3P76ULC?
COM31H3P76ULC is a 3.1-inch round Blanview TFT LCD with 480 × 480 RGB pixels. The reviewed Version 0.0 profile documents a VA normally-black a-Si TFT active matrix, a 50-pin 24-bit parallel RGB (8 bits per color channel) interface and an 88.83 × 91.43 × 5.60 mm outline.
What interface does COM31H3P76ULC use?
The reviewed module uses a 50-pin 24-bit parallel RGB (8 bits per color channel) interface with R7–R0, G7–G0, B7–B0, CLK, DE, HSYNC, VSYNC, STBYB and RESETB signals. Pin count alone is not a compatibility test; confirm timing, voltage and connector orientation.
What are the module and active-area dimensions?
The source drawing gives an 88.83 ±0.2 × 91.43 ±0.2 × 5.60 ±0.05 mm module outline and a 78.62 mm-diameter active area. The FPC is excluded from the outline dimensions. Use the controlled drawing for enclosure and PCB release.
How should the drawing scale be interpreted?
At exactly 100% PDF print scale, the source sheet retains the stated scales: the main view is S=1/1 and DETAIL A is S=2/1. Browser zoom, responsive resizing and printer scaling can change physical size. Annotated dimensions and tolerances—not measured screen or print line length—govern the design.
Is the COM31H3P76ULC Version 0.0 datasheet a final production specification?
No. The reviewed COM31H3P76ULC datasheet, specification 22TLM118 Version 0.0, is marked Tentative, under development and subject to change. It supports initial engineering evaluation. Confirm the controlled specification, drawing, timing and commercial status supplied with the quotation before committing tooling or production.
Is COM31H3P76ULC currently accepted for quotation?
Yes. SuccessLCD currently accepts RFQs for COM31H3P76ULC. That statement does not confirm stock, sample availability, MOQ, price or lead time. Those items, together with the controlled document revision and engineering fit, are confirmed in the written response.
Request a COM31H3P76ULC Engineering and Commercial Review
Send the information available now so SuccessLCD can review the COM31H3P76ULC interface, mechanical fit and quotation scope without turning a tentative source value into an unchecked design assumption.
- Application and project stage
- Sample request and forecast quantity
- Host processor, RGB timing, VDD/IOVDD and backlight-driver plan
- Enclosure opening, PCB/FPC position and connector orientation
- Operating temperature, ambient-light and viewing requirements
- Touch or cover-lens requirement, if any, for separate feasibility review
- Target project date and destination country
