1. General Information & Scope:

️· Product: LCD Display Module (Model: JH47480272A)
️· Purpose: Defines the technical specifications, inspection criteria, handling instructions, and quality control procedures for the LCD module.

2. Technical Specifications:

️· Display Type: TFT (Thin-Film Transistor) - Negative (likely refers to the LCD's polarity)
️· Viewing Direction: 12H (Specifies the optimal viewing angle)
️· Driving Method: 1/272 Duty Cycle (Describes the signal timing and control)
️· Logic Voltage: 3.3V (Operating voltage of the control logic)
️· LCD VOP: (Voltage for the LCD's video output - the actual voltage driving the LCD panel) - Value not provided in this excerpt.
️· Operating Temperature: -20°C to 60°C
️· Storage Temperature: -30°C to 70°C
️· Polarizer: Transmissive (Front)
️· Controller/Driver IC: HX8257 (COG - Chip On Glass - indicating the driver IC is directly mounted on the glass substrate)
️· Backlight: LED (Light Emitting Diode), White, with 10 LEDs.
️· Backlight Voltage: Value not provided.

3. Inspection Standards:

️· Visual Inspection: Details criteria for assessing defects like scratches, unevenness, color inconsistencies, and polarizer damage.
️· Electrical Testing: Tests for functionality, voltage levels, and performance under various conditions.
️· Performance Testing: Measurements of parameters like contrast ratio, response time, and viewing angle.

4. Handling and Storage Precautions:

️· Fragility: Emphasizes the LCD's fragility and provides detailed instructions on avoiding damage during handling, including impact prevention, cleanliness, and electrostatic discharge (ESD) control.
️· Polarizer Care: Highlights the delicate nature of the polarizer film and provides instructions on avoiding scratches and contamination.
️· Storage: Provides guidelines for proper storage conditions (temperature, humidity, darkness) to prevent degradation.
️· Interface Care: Emphasizes careful handling of the I/O and backlight cables.
️· Do Not Disassemble: Warns against disassembly or modification of the module.

5. Revision History:

️· Tracks changes to the document over time, including the original version and a more recent modification related to specification details and internal company changes.

6. Sample Approved Report:

️· A report for customer approval of a sample unit, detailing key specifications and providing space for customer feedback and signature. This allows customers to verify that the sample unit meets their requirements before mass production.

Key Takeaways:

️· High Precision: The module is manufactured with a high degree of precision and requires careful handling.
️· Quality Control: A robust quality control process is in place to ensure consistent performance and reliability.
️· Customer Collaboration: The sample approval process encourages collaboration between Jewel Hill and their customers.



This detailed document serves as a blueprint for quality control, customer communication, and proper handling of this specific LCD display module.