21.3" Stretched Bar LCD Display Module — LVDS / eDP Interface

Ultra-wide format TFT-LCD module engineered for panoramic HMI, digital signage, transportation, and industrial control applications.

⚠️ Note on specifications: Several values below marked "(Ref.)" are industry-standard reference values for the 21.3" class of stretched-bar LCD modules and should be confirmed against your factory's actual datasheet/mechanical drawing before publishing or quoting to end customers.

Overview

The 21.3" Stretched Bar LCD Module is a custom aspect-ratio TFT-LCD display, converted from a standard-format panel through precision glass cutting and re-sealing. Its elongated, panoramic form factor is purpose-built for applications where a conventional 4:3 or 16:9 display cannot fit the available mounting space — such as vehicle center consoles, self-service kiosks, elevator information bars, and instrumentation dashboards.

This module supports both LVDS and eDP digital interfaces, allowing direct integration with a wide range of embedded SoCs, industrial PCs, and Android/Linux/Windows-based controller boards without an external HDMI-to-LVDS converter.

Key Specifications

Core Features

• Custom Stretched-Bar Format — Precision glass cutting from standard TFT panels to non-standard, ultra-wide dimensions tailored to your enclosure.

• LVDS / eDP Native Support — Simplifies integration with embedded boards; no external scaler required for compatible controllers.

• Wide Operating Temperature Range — Suitable for automotive, transportation, and outdoor kiosk environments.

• Sealed Edge Treatment — Post-cut edge sealing process to protect against moisture ingress and liquid crystal leakage at the cut boundary.

• Optional Touch Integration — PCAP touch panel and cover lens bonding available for interactive applications.

• Custom Driving Board — LVDS/eDP-to-controller driver board can be co-designed for your specific timing and resolution.

Applications

• Vehicle center console / instrument cluster bar displays

• Elevator and building directory information bars

• Self-service kiosks and vending machines

• Digital signage and retail shelf-edge displays

• Industrial control panel HMIs

• Transportation (bus, rail) passenger information displays

Interface & Integration

Customization & OEM Capability

As a stretched-bar LCD specialist, we support full custom development from standard panel sourcing through to finished module:

• Custom cutting size and aspect ratio per customer mechanical drawing

• Resolution and active area confirmation via DFM (Design for Manufacturing) review

• Custom FPC/cable length and connector type

• Optional cover lens bonding (OCA/OCR) and anti-glare/AG or anti-fingerprint/AF coating

• Custom driving board and firmware/EDID configuration

Ordering Information

Request a formal quotation and datasheet through our RFQ form — mechanical drawings (DXF/DWG) and resolution/timing requirements are welcome for a fast feasibility review.

Technical FAQ — Engineering & Procurement Reference

For overseas engineers, procurement managers, and project owners evaluating custom-cut stretched-bar LCD feasibility.

1. Cutting Process & Feasibility

What cutting method do you recommend, and what tolerances apply?Two main methods are used for panel-to-bar conversion: mechanical wheel scribing (cutting wheel/scribe-and-break) and ultrafast laser cutting (picosecond/femtosecond laser). Mechanical scribing is more cost-effective for straight-line cuts on non-critical edges; laser cutting offers tighter tolerance control and lower micro-crack risk, and is recommended when the cut line passes close to active circuitry or when a smoother, chip-free edge is required. Standard dimensional tolerance is typically ±0.2–0.3 mm, refined to ±0.1 mm with laser cutting — final tolerance is confirmed per project after DFM review.

Will the cut line interfere with the panel's Gate/Source traces or TFT array area?This depends entirely on where the new cut boundary falls relative to the original panel's active area and driver IC/COF bonding region. Before quoting feasibility, we require:

• The target outline dimensions and desired active area (with tolerance)

• The source panel's original datasheet (active area, Gate/Source driver location, COF/TAB bonding position)

• Any keep-out zone requirements from your enclosure design

Our engineering team performs a DFM check against the source panel's internal layout to confirm the cut line avoids active circuitry, and will flag any conflict before sample production begins.

What edge quality standard applies after cutting?Post-cut edges are inspected for flatness and chip/micro-crack control under standard optical inspection. Typical acceptance criteria limit visible chipping to a defined edge-band width (e.g., ≤0.1–0.2 mm from the glass edge) with no crack propagation toward the active area — exact AQL/inspection criteria are documented in the project's quality agreement.

2. Reliability & Edge Sealing Assurance

How do you prevent liquid crystal leakage and moisture ingress at the cut edge?Cut edges undergo a secondary sealing process, typically UV-cure adhesive dispensing along the exposed glass edge, forming a barrier against LC leakage and moisture penetration. Depending on the application environment, additional edge coating or a secondary structural adhesive bead may be applied for enhanced protection.

Can the cut module pass standard reliability testing, and can you share benchmark data?Cut/sealed modules are validated against consumer- or industrial-grade reliability standards depending on end-use (please specify your target grade for us to align test scope). Typical test items referenced for similar cutting projects include:

• Double 85 (85°C/85%RH) high-temperature high-humidity test — typically 96–240 hrs depending on grade

• Thermal shock / cold-hot cycling — typically -20°C to +60°C or -30°C to +70°C, multiple cycles

• Structural drop test — per customer's mechanical enclosure spec

Specific pass/fail benchmark data from prior cutting projects can be shared under NDA upon request, as results vary by panel source, cut geometry, and sealing process revision.

Does edge sealing create light leakage or color shift (Mura) near the cut boundary?A well-controlled cutting and sealing process should not introduce visible light leakage or Mura at the edge under normal viewing conditions. Risk increases if the cut line is too close to the backlight edge or if edge sealing is inconsistent — our process includes optical inspection (light leakage and Mura check) as a standard QC gate before shipment.

3. Cost, Yield & Lead Time

What is the NRE cost and first-sample lead time for a custom cutting project?NRE (cutting tool/fixture setup, DFM engineering, first-article validation) is quoted per project based on cut complexity and source panel. As a general reference, first-sample turnaround (e.g., 20 pcs) typically runs 15–20 working days after drawing and specification confirmation — final quotation and lead time are provided after feasibility review.

What yield and MOQ should we expect at mass production?Mass-production yield for cutting projects typically ranges in the 90%+ range once the process is qualified and stable, though this varies with cut geometry complexity and source panel consistency. MOQ is generally driven by source panel MOQ and cutting batch efficiency — please share your target volume so we can confirm the most cost-effective MOQ tier.

This content is provided as a general engineering reference. Exact tolerances, test standards, and commercial terms should be confirmed in a formal quotation and quality agreement specific to your project.