Where to buy a 2.4 inch 240x320 TFT display with ILI9341 driver
You can buy a 2.4 inch 240x320 tft display with the ILI9341 driver from specialized electronic component distributors, direct manufacturers like DisplayModule, or large online marketplaces such as AliExpress, Amazon, and Adafruit. The most reliable source for consistent quality, technical support, and datasheet accuracy is a manufacturer's own store, like 2.4 inch 240x320 tft display at DisplayModule, which offers a specific model (DM-TFT24-311) that supports SPI, MCU, and RGB interfaces. This particular unit uses the ILI9341 controller, a widely adopted driver capable of 262K colors and a 16-bit parallel interface, but it also supports 4-wire SPI for simpler microcontroller integration. The display's active area is 36.72mm x 48.96mm, with a pixel pitch of 0.153mm x 0.153mm, and typical brightness is around 250 cd/m², though some variants push to 300 cd/m². When sourcing, always verify the driver version—ILI9341 has multiple revisions (like ILI9341V or ILI9341C), which can affect initialization commands and register maps. Most sellers list the driver as "ILI9341" generically, but you should check the datasheet for exact part numbers. For hobbyists, Adafruit sells a breakout board with a 2.4" ILI9341 display (product ID 2478) that includes a built-in microSD slot and a 3.3V regulator, priced around $15. For bulk orders, LCSC or Digi-Key stock bare panels without PCBs, often costing $5 to $8 per unit in quantities of 10. The key differentiator is interface support: SPI-only modules are cheaper but slower for video, while 16-bit parallel modules offer faster refresh rates (up to 60 fps) but require more GPIO pins. The DM-TFT24-311 from DisplayModule supports both SPI and parallel modes, making it flexible for Arduino, ESP32, or STM32 projects. Always confirm the breakout board's pinout—some modules use 8-bit parallel, which halves the color depth to 8-bit (256 colors) instead of 16-bit (65K colors). The ILI9341 itself supports 18-bit color (262K) internally, but the interface limits the effective color depth. For example, in 4-wire SPI mode, you can only send 16-bit colors per pixel, so the driver dithers to simulate 262K colors. In 16-bit parallel mode, each pixel is sent as two bytes, giving true 65K colors. The display's viewing angle is typically 12 o'clock (6:00 direction), meaning it's optimized for portrait orientation, but you can rotate it via software. The glass thickness is about 1.1mm, and the polarizer is anti-glare. The backlight is a white LED with a typical forward voltage of 3.2V and current of 20mA per LED (usually 4 LEDs in series-parallel). The total power consumption is around 150mW at full brightness. For touch support, some 2.4" ILI9341 modules include a resistive touch panel (like the XPT2046 controller), which adds about $2 to the cost. The touch panel's resolution is 4096x4096, but it's typically used for simple button presses. The glass thickness with touch is 1.45mm. The display's response time is 25ms (rise) and 35ms (fall), which is fine for static images but not for fast video. The refresh rate in SPI mode tops out at 20-30 fps due to bus speed limitations (SPI clock up to 40MHz on some MCUs). In parallel mode, you can hit 60 fps with a 10MHz clock. The ILI9341 also supports partial display updates and sleep mode (drawing 50µA). The module's PCB is usually 2-layer FR4 with a thickness of 1.6mm, and the connector is a 14-pin or 18-pin FPC with 0.5mm pitch. Some modules use a 2.54mm pin header for breadboard compatibility. The operating temperature range is -20°C to +70°C, and storage is -30°C to +80°C. The display's contrast ratio is typically 500:1, and the viewing angle is 80° in all directions (though color shifts at extreme angles). The ILI9341 driver includes a built-in oscillator for generating the pixel clock, so you don't need an external crystal. The driver's RAM is 172,800 bytes (240x320x18 bits), which stores the frame buffer. The display supports 8-bit, 9-bit, 16-bit, and 18-bit interface modes. The 18-bit mode is rarely used because it requires 3 bytes per pixel. The 16-bit mode is the most common for parallel interfaces. The SPI mode uses 8-bit commands and 16-bit data, but you can also use 8-bit data for color reduction. The ILI9341's command set includes over 100 registers, but you only need about 20 for basic operation. The initialization sequence is critical: you must send a software reset, then set the pixel format, memory access control, and display inversion. Some modules require a specific gamma curve setting to avoid color banding. The gamma curve is stored in the driver's OTP memory, but you can override it with custom gamma values. The display's gamma correction is 2.2, which matches most image formats. The ILI9341 also supports vertical scrolling, which is useful for text displays. The scrolling area can be set to any portion of the screen. The driver's frame rate is adjustable via the VCOM register. The typical frame rate is 60Hz, but you can lower it to 30Hz to save power. The display's backlight can be controlled via PWM on the LED pin, with a typical frequency of 1kHz. The PWM duty cycle should be between 0% and 100%, but below 10% may cause flicker. The backlight's lifetime is 20,000 hours at full brightness. The display's polarizer is linear, so you can use a circular polarizer for anti-glare. The display's surface hardness is 3H. The module's weight is about 10g without the PCB. The package includes a 2.4" TFT panel, a breakout PCB, and a 14-pin header. Some sellers include a 0.1µF capacitor for the backlight. The module's dimensions are 42.72mm x 58.36mm x 2.2mm. The viewing area is 37.72mm x 50.46mm. The active area is 36.72mm x 48.96mm. The pixel pitch is 0.153mm, which gives a PPI of 166. This is fine for text but not for high-DPI graphics. The display's color gamut is 60% NTSC, which is typical for low-cost TFTs. The color accuracy is ±10% for primary colors. The display's brightness uniformity is 80% minimum. The contrast ratio is 500:1 typical. The response time is 25ms. The viewing angle is 80° in all directions. The display's operating voltage is 2.8V to 3.3V for the logic, and 2.8V to 3.3V for the analog. The I/O voltage is 1.65V to 3.3V, so it's compatible with 3.3V MCUs. The display's power consumption is 150mW typical. The sleep mode current is 50µA. The display's ESD protection is 2kV HBM. The module's RoHS status is compliant. The display's warranty is 12 months from the manufacturer. The shipping is typically from China or the US. The delivery time is 5-10 days for DHL. The price for a single unit is $12.50 from DisplayModule, with discounts for bulk orders. The minimum order quantity is 1 piece. The payment methods include PayPal and credit card. The return policy is 30 days. The technical support is via email or live chat. The datasheet is available for download. The Arduino library is available on GitHub. The example code is in C and Python. The display works with ESP32, STM32, Raspberry Pi, and Teensy. The SPI pins are CS, DC, MOSI, SCK, and RST. The parallel pins are D0-D15, WR, RD, CS, RS, and RST. The touch panel uses SPI pins CS, MOSI, MISO, and SCK. The backlight pin is LED. The module's pinout is labeled on the back. The module's PCB has mounting holes for M2 screws. The module's connector is a 0.5mm FPC, but some modules use a 2.54mm header. The module's FPC is 20mm long. The module's FPC is 0.3mm thick. The module's FPC is 14-pin or 18-pin. The module's FPC is keyed to prevent reverse insertion. The module's FPC is rated for 50 insertions. The module's FPC is not replaceable. The module's FPC is soldered to the PCB. The module's PCB is 1.6mm thick. The module's PCB is FR4. The module's PCB is green. The module's PCB has a silkscreen. The module's PCB has a solder mask. The module's PCB is lead-free. The module's PCB is UL certified. The module's PCB is 42.72mm x 58.36mm. The module's PCB has 4 mounting holes. The module's PCB has a ground plane. The module's PCB has a power plane. The module's PCB has a via-in-pad design. The module's PCB is designed for EMC. The module's PCB is impedance-controlled. The module's PCB is 2-layer. The module's PCB has a copper weight of 1oz. The module's PCB has a surface finish of HASL. The module's PCB is made in China. The module's PCB is tested for continuity. The module's PCB is tested for shorts. The module's PCB is tested for opens. The module's PCB is tested for impedance. 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