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IPS TFT replacements solve 4.3” TN TFT display shortage

21 July 2021

Relec_TFT Display Shortages

Power conversion & displays specialist, Relec & partner, Digiwise are addressing the industry’s shortage of 4.3” TN TFT panels with superior IPS drop-in TFT replacements.

A shortage of 4.3” TFT displays has caused considerable disruption in the display market. Many manufacturers are refusing to accept new orders for 4.3” TFT TN panels, in order to meet the increased demand for larger panels which are specified for consumer products and in automotive designs.

One of the reasons why TN (twisted neumatic) TFT panels are so popular is that they are inexpensive, making them ideal for cost-sensitive applications where space is limited. A shortage of 4.3” TN TFT displays can disrupt supply, hamper innovation and delay time-to-market in what are often incredibly competitive areas.

Instead of having to find and source alternatives, display engineers can fulfil design criteria and introduce new, cost-efficient and innovative products to market.

Relec’s partner, Digiwise, offers drop-in IPS (in plane switching) TFT replacements for many 4.3” TN TFT displays. Relec offers a series of 4.3” TFT displays from Digiwise for HDMI, LCD TFT and touchscreen panel displays.

This option not only solves the supply issue, but overcomes many of the technology challenges of TN TFT displays. While TN displays are inexpensive, they suffer from poor viewing angles and grey scale inversion when viewed at anything other than an optimum angle or direction. IPS technology, on the other hand, offers a wide viewing angle and improved colour balance. IPS arranges and switches the alignment of the crystal molecules between the glass substrates. This reduces the amount of light scatter in the matrix and means that the displays have a near 180 degree viewing angle, as well as vastly improved colour balance when viewed from any angle or direction.

There are standard panels available, but Relec and Digiwise also able to offer support for custom TFTs and touch panels. This means that even if a supplier says a 4.3” TN TFT display is unavailable, Relec and Digiwise can supply the equivalent size in superior IPS technology. The screen can also be modified to meet a specific application’s requirements. Customisation options include optical bonding, surface treatments, mounting frames, enhancement films or changes to the PCB layout or connector positions. In this way, IPS TFT displays can be modified to match legacy products to be used as replacements, as well as used in new designs to create new and innovative displays.


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