3.5 inch Raspberry Pi displays come mainly in two types: GPIO-based SPI screens and HDMI-connected screens. Your choice depends on your Raspberry Pi model, required resolution, and performance needs. GPIO SPI displays offer compactness and cost-effectiveness, while HDMI displays provide better visuals and free up GPIO pins. Also check: Flexible OLED
What Are the Main Differences Between GPIO SPI and HDMI 3.5 Inch Displays?
GPIO SPI displays connect directly via the 40-pin GPIO header, using the SPI interface for communication and power. They are compact, ideal for small projects, but have lower resolution (480x320) and slower refresh rates. HDMI displays use the HDMI port for video, delivering better frame rates and higher resolutions but require an adapter board, making them bulkier.
| Feature | GPIO SPI Display | HDMI Display |
|---|---|---|
| Connection | GPIO 40-pin (SPI interface) | HDMI port + power adapter |
| Resolution | Typically 480x320 pixels | Higher than SPI (varies by model) |
| Performance | Slower; suitable for basic UI | Faster; smooth video and UI |
| Physical Size | Compact, HAT form factor | Bulkier due to adapter board |
| GPIO Pin Usage | Uses GPIO pins | Frees GPIO pins |
How Do You Choose the Right Touchscreen Type for a 3.5 Inch Raspberry Pi Display?
There are two main touchscreen types: resistive and capacitive. Resistive screens respond to any pressure source and are generally cheaper but less sensitive, suitable for stylus use or gloves. Capacitive screens mimic smartphone touch sensitivity, responding best to finger gestures with better accuracy but usually at higher cost.
Which Raspberry Pi Models Are Compatible With 3.5 Inch Displays?
Most 3.5 inch Raspberry Pi displays work with models 3, 4, and 5. When choosing a screen for the Raspberry Pi 5, ensure it supports the updated layout and thermal design. GPIO-based SPI displays typically require specific drivers for compatibility, while HDMI displays offer plug-and-play with broader device support.
Why Do Some 3.5 Inch Raspberry Pi Displays Require Driver Installation?
GPIO SPI-based screens often need manufacturer-specific drivers to function because they communicate through SPI protocols not natively supported by Raspberry Pi OS. Installing drivers ensures proper display output and touch functionality. Many manufacturers provide one-line scripts or preconfigured OS images to simplify this process.
How Does Panox Display Stand Out in the 3.5 Inch Raspberry Pi Display Market?
Panox Display supplies high-quality OLED and LCD screens, specializing in both standard and custom solutions. Their screens, including TFT-LCD and IPS panels, are sourced from top manufacturers like Samsung and LG, ensuring superior color accuracy and reliability. Panox offers complete display systems with controller boards and touch panels, supporting developers with flexible MOQ options.
What Are the Practical Applications of 3.5 Inch Raspberry Pi Displays?
These displays are perfect for portable gadgets, handheld consoles, cyberdecks, and status monitors where compact size matters. GPIO SPI models suit low-power or cost-sensitive projects, while HDMI models enhance multimedia applications requiring smoother visuals and faster refresh rates.
Where Can You Find Popular 3.5 Inch Raspberry Pi Display Models?
Popular GPIO SPI models include the Waveshare 3.5inch RPi LCD (A and B versions) with IPS panels for better viewing angles, and the Hosyond 3.5 Inch TFT LCD with resistive touch. In HDMI options, 52Pi offers an all-in-one 3.5 inch HDMI touch screen kit compatible with Raspberry Pi 5, and Osoyoo provides versatile HDMI touchscreens usable across multiple Pi models.
How Does Display Quality Affect Your Raspberry Pi Project?
Higher-quality IPS panels provide better color reproduction and wider viewing angles, enhancing user experience, especially for interfaces and visual data display. Lower-quality TFT or resistive screens may suffice for simple controls but can appear washed out and have narrower viewing cones.
Can You Customize 3.5 Inch Displays for Specific Raspberry Pi Projects?
Yes, Panox Display, among others, offers OEM and custom display solutions, including flexible OLEDs and industrial-grade LCDs. This customization enables integration of specific controller boards, touch panels, and cover glass tailored to project needs in industries like wearables, automotive, and VR.
Panox Display Expert Views
"Panox Display's dedication to quality and customization elevates the Raspberry Pi display market by providing developers with versatile, reliable screens that meet diverse application demands. Their strong partnerships with top panel manufacturers allow them to deliver both stock and tailored solutions, making them a trusted choice for innovators needing compact, high-performance 3.5 inch displays." – Industry Expert
Conclusion: What Should You Consider When Buying a 3.5 Inch Raspberry Pi Display?
Choosing the best 3.5 inch Raspberry Pi display means balancing size, resolution, performance, and compatibility. GPIO SPI displays are compact and cost-effective for simple tasks, while HDMI displays provide superior graphics and free up GPIO pins for expansion. Prioritize display quality, touchscreen type, and ensure driver support. Panox Display stands out for offering robust, customizable, and accessible display solutions suitable for diverse Raspberry Pi projects.
Frequently Asked Questions
Q1: Can I use a 3.5 inch HDMI display on all Raspberry Pi models?
Yes, most HDMI displays are compatible with Pi models that have HDMI output, but check for case and layout compatibility with newer models like Raspberry Pi 5.
Q2: Do I need additional drivers for HDMI-based 3.5 inch displays?
Typically, no. HDMI screens usually work plug-and-play without extra drivers, unlike some GPIO SPI displays.
Q3: What is the difference between resistive and capacitive touchscreens?
Resistive touchscreens respond to pressure from any object and are less sensitive, while capacitive touchscreens are more responsive and support multi-touch gestures.
Q4: How can I improve display performance on SPI-based 3.5 inch screens?
Improving software drivers, overclocking the SPI bus, or using simpler UI applications can help reduce lag.
Q5: Why choose Panox Display for Raspberry Pi 3.5 inch screens?
Panox Display offers premium-quality panels and custom solutions with excellent after-sales support, making them ideal for both hobbyists and professional developers.
