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7.0″ 40-pin TFT Display – 800×480 with Touchscreen + HDMI / DVI Decoder

BD37

Only 1 left in stock

7.0″ TFT screen with touch, 800×480 pixels

Only 1 left in stock

SKU: PI-7inch-Screen Categories: , Tags: , , , , , ,

Description

This 7.0″ TFT screen has lots of pixels, 800×480 to be exact, an LED backlight and a resistive touchscreen overlay. Its great for when you need a lot of space for graphics or a user interface. These screens are commonly seen in consumer electronics, such as miniature TV’s, GPS’s, handheld games car displays, etc. A 40-pin connector has 8 red, 8 green, and 8 blue parallel pins, for 24 bit color capability.

This is a “raw pixel-dot-clock” display and does not have an SPI/parallel type controller or any kind of RAM. The display is supposed to be constantly refreshed, at 60Hz, with a pixel clock, V sync, H sync, etc. There are some high end processors such as that used in the BeagleBone that can natively support such RGB TTL displays. However, it is extremely rare for a small microcontroller to support it, as you need dedicated hardware or a very fast processor such as an FPGA. Not only that, but the backlight requires a 125-150mA constant-current mode boost converter that can go as high as 9V instead of our other small displays that can run the backlight off of 5V.

 

Comes with the driver – HDMI/DVI Decoder to 40-Pin TTL Breakout – With Touch

TFP401 HDMI/DVI Decoder to 40-Pin TTL Breakout - With Touch

 

It’s a mini HDMI decoder board! So small and simple, you can use this board as an all-in-one display driver for TTL displays, or perhaps decoding HDMI/DVI video for some other project. This breakout features the TFP401 for decoding video, and for the touch version, an AR1100 USB resistive touch screen driver.

The TFP401 is a beefy DVI/HDMI decoder from TI. It can take unencrypted video and pipe out the raw 24-bit color pixel data – HDCP not supported! It will decode any resolution from 25-165MHz pixel clock, basically up to 1080p. We’ve used this breakout with 800×480 displays, so we have not specifically tested it with higher resolutions. We added a bunch of supporting circuitry like a backlight driver and configured it for running basic TTL display panels such as the ones we have in the shop

You can even power the display and decoder from a USB port. For example, with a 5″ 800×480 display and 50mA backlight current, the current draw is 500mA total. You can reduce that down  370mA by running the backlight at half-brightness (25mA). With the backlight off, the decoder and display itself draws 250mA. If you want more backlight control, there’s a PWM input, connect that to your microcontroller or other PWM output and you can continuously dim the backlight as desired

We have two versions, one is video only and one is video+touch. This is the version with touch! Pair it with a screen that has a resistive touch overlay. The USB port then acts as both power and data, with the touch screen appearing like a USB mouse. We’ve tested it sucessfully on Mac, Windows, and Debian Linux (Raspbian on a Raspberry Pi). Other Linux distributions may or may not work, but if you’re running Linux you’re probably used to that.

This driver is designed specifically as a small and easy to use display driver for our 40-pin TTL displays. In particular, we suggest it for use with single board computers (or desktop/laptops!) with DVI/HDMI output like the Raspberry Pi or BeagleBone Black. You can power the driver over USB and then feed it video via the HDMI port. It’s a very small board so great for tucking into an enclosure. It can drive our 4.3″, 5.0″ or 7.0″ displays but we really only recommend the 5″ or 7″ 800×480 as some computers do not like the low resolution of the 4.3″ and the TFP401 does not contain a video scaler, it will not resize/shrink video!

We ship this board with an 800×480 resolution EDID so it will be auto-detected at that resolution. For advanced users, the EDID can be reprogrammed using our example Arduino code. Or, for computers that use linux, you can always just force the resolution to whatever display you have connected.

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