Comparison of Sharp LCD Displays: LM32P073 and LM320191

To compare the Sharp LCD modules LM32P073 and LM320191, we will examine their specifications, similarities, and differences based on the information available from Shunlongwei Co., Ltd. This structured comparison will highlight their shared features and distinct characteristics.

Common Parameters

1. Display Size: Both modules feature a 5.7-inch display, suitable for similar compact applications.
2. Resolution: Each display has a resolution of 320 x 240 pixels (QVGA), ensuring consistent image clarity.
3. Aspect Ratio: Both maintain a 4:3 aspect ratio, ideal for applications requiring this specific format.
4. Input Voltage: Both modules operate at an input voltage of 5.0V, making them compatible with standard power supplies.
5. Interface: Both use a parallel data interface, facilitating easy integration into existing systems.

LM32P073 Specifications

• Brightness: 130 cd/m²
• Contrast Ratio: 70:1
• Viewing Angle: 45° (horizontal), 35° (vertical)
• Display Mode: STN-LCD, Transmissive, Normally White
• Backlight: LED
• 

LM320191 Specifications

• Brightness: 400 cd/m²
• Contrast Ratio: 150:1
• Viewing Angle: 80° (horizontal), 70° (vertical)
• Display Mode: STN-LCD, Blue Mode, Transmissive, Normally White
• Backlight: WLED
• 

Differences

1. Brightness: The LM320191 offers significantly higher brightness (400 cd/m²) compared to the LM32P073 (130 cd/m²). This makes the LM320191 more suitable for environments with brighter ambient light.
2. Contrast Ratio: The LM320191 has a higher contrast ratio of 150:1, providing better image quality with more distinct differentiation between light and dark areas compared to the LM32P073’s 70:1 contrast ratio.
3. Viewing Angle: The LM320191 offers a wider viewing angle (80° horizontal and 70° vertical) compared to the LM32P073 (45° horizontal and 35° vertical). This makes the LM320191 more suitable for applications where the display may be viewed from various angles.
4. Backlight Type: The LM32P073 uses a standard LED backlight, while the LM320191 uses a WLED (White LED) backlight. WLEDs generally provide better brightness and energy efficiency.
5. Display Mode: The LM320191 features a Blue Mode (Negative) display, offering improved visibility under certain conditions compared to the standard transmissive display mode of the LM32P073.

Analysis and Conclusion

Both the Sharp LM32P073 and LM320191 LCD modules are designed for industrial and commercial applications due to their robust features and reliable performance.

Interchangeability:

• Brightness and Contrast Requirements: For applications that do not require high brightness and contrast, the LM32P073 can be used interchangeably with the LM320191. However, for applications that benefit from higher brightness and contrast, the LM320191 is the better choice.
• Viewing Angle Considerations: In environments where the display will be viewed from different angles, the LM320191 is preferable due to its wider viewing angles.
• Cost Considerations: The LM32P073 may be more cost-effective for basic applications that do not require the higher specifications of the LM320191.

In summary, while both LCD modules can be used in similar applications, the choice between the LM32P073 and LM320191 should be guided by the specific requirements of brightness, contrast ratio, and viewing angle for your application. For more detailed information and purchasing options, refer to their respective product pages on Shunlongwei’s website: LM32P073 and LM320191.