High-Resolution 3.4-Inch Square LCD (540x540) with In-Cell Touch Now Available

     For a long time, the mainstream resolution for 3.4-inch square displays was limited to 480x480, with no higher options available. Many customers have been frustrated by the lack of higher-resolution alternatives in this size category. Today, Shenzhen Hongjia Technology is introducing a high-resolution 3.4-inch square LCD featuring a 540x540 resolution and In-Cell touch technology,The driver IC is the JD9261T; it integrates display and touch functions and is a high-performance driver IC. supporting both RGB and MIPI interfaces. Mass production is currently underway, and we welcome customer inquiries. Below is an exploration of potential industry applications for this 3.4-inch, 540x540 resolution display.

Natural Synergy Between Form Factor and Technology

     Square 540x540 Format: Features a symmetrical pixel arrangement with no wasted space from corner cropping. It is ideal for UI designs requiring orderly layouts and moderate information density—such as instrument clusters, rotary dial interfaces, 3x3 grid menus, and localized previews for QR codes or tickets.

     In-Cell Touch Technology: Integrates the touch sensor directly into the LCD array, making the module approximately 40%–45% thinner than G+G (Glass-on-Glass) solutions. It eliminates air gaps, improves light transmission, reduces accidental edge touches, and utilizes a single TDDI (Touch and Display Driver Integration) chip to manage both display and touch functions. II. Specific Application Areas for Electronic Devices.

1. Smart Home and Appliance Control Centers

Smart lock exterior/interior displays, video doorbell indoor units, and rotary knob displays for lighting, curtains, and HVAC systems

Square status and touch panels for ovens, steam ovens, coffee machines, and robot vacuum docking stations

Wall-mounted IoT control centers (replacing some 4-inch round screens; square screens can fully display weather cards and device lists)

2. Instrument and Gauge Displays

Beauty equipment

Handheld testing devices

Industrial instruments

3. Medical Devices

Blood pressure monitors

Fetal heart rate monitors

Pulse oximeters

     This 3.4-inch square LCD features an integrated touch screen; the in-cell process significantly reduces the thickness of the display-touch module and the overall device profile, while also improving tactile feel. By eliminating the need for a separate touch IC, the design simplifies debugging and drastically reduces software development time for customers. In-cell display technology represents a key industry trend; Shenzhen Hongjia Technology offers a range of in-cell screens—please feel free to contact us via email for inquiries.