How Do You Write an LCD Specification Sheet?
An LCD specification sheet is the document that turns a product idea into a quoteable, buildable display. Its quality decides whether suppliers quote the same thing, whether samples meet expectations, and whether disputes have…
How a Good LCD Specification Changes the Quote
A vague request produces vague quotes: suppliers fill the gaps with their own assumptions, and the differences surface at samples. A complete specification lets suppliers quote the same build, so prices and timelines are comparable. The spec sheet is also the acceptance reference—what the sample and production must meet—so its precision decides how disputes end.
The 10 Essential Fields in an LCD Specification Sheet
- Size and active area
- Resolution and pixel format
- Interface and pinout
- Brightness and optical targets
- Viewing angle and contrast
- Electrical supply and backlight drive
- Touch requirements (if any)
- Operating and storage environment
- Mechanical outline and tolerances
- Acceptance criteria and documents
Every field needs a unit and a condition, not just a value.
Optical Specifications: Brightness, Contrast, and Gamut
Optical values are meaningless without conditions. Brightness needs the drive current and measurement point; contrast needs the viewing geometry; color gamut needs the reference space. State each optical requirement with its measurement condition so suppliers measure the same way you do, and confirm the values against the datasheet rather than against a marketing page.
Electrical Specifications: Supply, Backlight, and Pinout
The electrical section defines how the display is powered and driven: logic supply voltage and current, backlight drive (voltage or current, with dimming if used), and the signal pinout. Include absolute maximum ratings and any power sequencing the panel needs. Pinout errors are among the most expensive mistakes, so the pin table belongs in the spec as a controlled reference.
Mechanical and Environmental Specifications: Outline, Temperature, and IP
The mechanical section fixes the outline, active-area position, mounting, FPC route, and tolerances; the environmental section sets operating and storage temperature, humidity, and any ingress protection target. Mechanical tolerances must match the enclosure, and environmental limits must include storage and transport—not just operation.
Attachments to Include: Drawings, References, and Criteria
Attach the mechanical drawing, the interface specification reference, and the acceptance criteria (including inspection conditions and defect definitions). The attachments are part of the spec: a spec sheet without its drawing leaves the most important dimensions to interpretation.
LCD Spec Sheet Review Checklist: Before You Send It
- Every value has a unit and condition.
- Size, resolution, and interface match the host and enclosure.
- Optical values are measurable and referenced to the datasheet.
- Electrical section covers supply, backlight, pinout, and sequencing.
- Environmental limits include storage and transport.
- Drawings, interface references, and acceptance criteria are attached.
If you are preparing an LCD specification, complete every field with its condition and attach the drawing before sending it to suppliers. CDTech reviews custom LCD specifications across the custom display range—contact us to check your spec sheet.
