Custom-Sized Stretched Bar LCD Modules: Technical FAQ for OEM Buyers, Project Managers & Engineers

Reference product: 36.6" Long Narrow LCD Module (Model S366AJ1‑LE1) — HITULCD (Shenzhen Hantu Jiashi Technology Co., Ltd.)

This document is intended for overseas engineers, procurement managers and project owners who are evaluating a non-standard aspect-ratio LCD for a kiosk, digital signage, transportation display or equipment-integration project. Two paths exist to reach an unusual "stretched bar" form factor: (1) a native stretched panel, built by the glass fab at the target aspect ratio, or (2) a cut panel, where a standard-size TFT panel is mechanically or laser-cut down to a narrower strip. Because most inbound RFQs raise the same set of technical concerns, we've organized this FAQ around three stages of your evaluation: process feasibility, reliability/sealing, and cost/yield/lead time.

1. Cutting Process & Design Feasibility

Q: For a custom size, which cutting method do you recommend — mechanical wheel scribing or laser cutting?The right method depends on the target dimension, panel thickness and required edge tolerance:

• Mechanical wheel (scribe-and-break) is lower-cost and suitable for straight-line cuts with looser tolerance (typically ±0.3–0.5 mm), but carries a higher risk of micro-chipping at the edge.

• Laser cutting (CO₂ or UV/cold laser) gives a tighter tolerance (down to ±0.1 mm on suitable glass), a cleaner edge, and lower thermal/mechanical stress on the panel — recommended when the cut line runs close to active circuitry or when the customer requires a polished, chip-free edge for exposed-edge industrial design.

Our engineering team confirms the appropriate method after reviewing your target dimensions and the source panel's internal layout — please treat any cutting method as a recommendation only until confirmed against the actual panel drawing.

Q: Will the cut line interfere with the Gate/Source driving circuitry or the active TFT array?This is the single most important feasibility check before any cutting project is quoted. It depends entirely on where the non-active border (the routing/fan-out area for Gate and Source lines) sits relative to your desired cut line on the specific source panel you intend to use.

Q: What drawings or parameters do you need from us to confirm feasibility at the pre-evaluation stage?To run a feasibility check, please provide:

1. The source panel's model number and, if available, the manufacturer's outline/mechanical drawing (showing active area, Gate/Source COF or COG bonding location, and non-display border width).

2. Your target final dimensions (active area and outline), with tolerance.

3. Intended mounting method (bezel, embedded/flush mount, VESA, etc.) and any keep-out zones on your side.

4. Application environment (indoor/outdoor, operating temperature range, exposure to moisture/dust).

With this information we can indicate, before any sample is cut, whether the cut line clears the circuit area or whether an alternative source panel/size is advisable.

Q: What edge-flatness and micro-crack control standard applies after cutting?Cut edges are inspected against an internal edge-quality standard covering chipping depth, edge flatness and squareness; laser-cut edges are additionally checked under magnification for micro-cracks before a panel proceeds to sealing. Exact acceptance criteria (chip depth limits, inspection magnification, AQL) are confirmed per project and can be shared alongside the sample offer once your target spec is known.

2. Reliability & Edge-Sealing Assurance

Q: How is the cut edge sealed against moisture ingress and liquid-crystal leakage?A cut panel exposes the LC cell edge that was previously protected by the original glass border, so a secondary edge-sealing step is required. Depending on the panel and application, this typically uses UV-cure edge sealant applied by controlled dispensing, chosen for adhesion to glass, low outgassing and cure speed compatible with production throughput; alternative sealants may be used where a wider operating-temperature range or higher humidity resistance is required. The dispensing process and cure profile are qualified for each panel model as part of project engineering — we don't apply a one-size-fits-all seal across different glass types.

Q: Can the finished module pass standard reliability testing, and can you share benchmark data from similar cutting projects?Cut-and-sealed modules are put through the same class of environmental and mechanical qualification used across our product line — this generally includes high-temperature/high-humidity (double-85) soak, thermal cycling (hot/cold shock), and structural drop testing, with test level (consumer-grade vs. industrial-grade) selected to match your application. We're glad to share test reports and pass/fail data from comparable past cutting projects once we know your target panel and environmental spec — this lets us reference the closest real precedent rather than a generic figure.

Q: Does the sealed edge cause light leakage or color-shift (Mura) near the border?It can, if the seal or the polarizer/backlight interface at the cut edge is not properly controlled — this is one of the main reasons the sealing and dispensing process is qualified per panel rather than treated as an afterthought. Panels are visually inspected under production lighting conditions specifically for edge light leakage and Mura before shipment, and the acceptance criteria are shared as part of the quotation/sample package.

Note: The 36.6" module referenced above (S366AJ1‑LE1) is a native stretched panel, not a cut panel — it is built at the finished 6.62:1 aspect ratio at the glass-fab stage. For projects where edge-sealing risk, Mura risk or long-term reliability margin are the top priority, a native stretched panel avoids the cutting/sealing question entirely and is worth comparing against a cut-panel approach at the quotation stage.

3. Cost, Yield & Lead Time

Q: What is the NRE for a custom cutting project, and how long does a first sample run (e.g., 20 pcs) take?NRE and sample lead time depend on the source panel, target dimension, cutting method and sealing qualification required, so we quote these per project rather than publishing a flat rate. As a general framework: our standard lead time for existing product configurations is 2–3 weeks, while custom projects (including new cutting/sealing qualification) typically run 4–6 weeks from confirmed spec to first samples — final timing is confirmed in the formal quotation once drawings and target quantities are reviewed.

Q: Based on your experience, what yield can we expect at mass production, and what is your MOQ?Yield for a cutting-based custom size is influenced by cut-line proximity to circuitry, glass thickness and target tolerance, so we provide a project-specific yield expectation only after the feasibility review in Section 1 is complete, rather than quoting a single number across all sizes. On order quantities: our published MOQ for standard specifications is as low as 1 unit, but custom brightness, cutting or bezel changes typically raise the MOQ, which is confirmed at the time of quotation. Sample units are available ahead of any bulk commitment.

Company & Compliance Snapshot (for supplier qualification)

Next Step

To move a custom-cut or native stretched-bar project from inquiry to feasibility confirmation, please send:

1. Source panel model/drawing (if a cut-panel approach) or target active-area dimensions (if a native panel is preferred),

2. Target quantity (sample and projected annual volume), and

3. Application/environmental requirements.

Our engineering team will respond with a feasibility assessment, recommended process, and indicative NRE/lead time.