Flicker-Free Displays for Medical Equipment: DC Dimming and PWM
Flicker is a dimming problem rather than a panel problem, and the two ways of dimming an LED backlight behave differently. This page covers…
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Display engineering notes
Technical Blog
Engineering notes from the CDTech display team: choosing and integrating TFT LCD modules, touch screens and optical bonding for industrial, medical, automotive and smart-home products.
- TFT LCD modules
- Touch & bonding
- Industrial
- Medical
- Automotive
- Selection & sourcing
All articles
278 articles on choosing, integrating and qualifying display modules.
PCAP vs Resistive Touch Screens: The Complete Comparison
PCAP (projected capacitive) and resistive are the two dominant touch technologies, and the choice between them shapes the entire user experience. PCAP supports multi-touch…
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RGB Parallel Interface for TFT Displays: When to Use It
RGB parallel is the direct interface: the host drives pixel data over a wide bus while the panel refreshes from the live stream. It…
Read the noteCustom Touch Panel Manufacturing: From Sensor to Module
A custom touch panel is a stack of decisions: sensor type, electrode material, lamination method, controller, and cover. Understanding how a touch panel is…
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Rugged LCD Displays: What Rugged Really Means
"Rugged" is a specification, not a label. A rugged LCD display is one that has defined environmental and mechanical limits, tested against defined conditions,…
Read the noteDisplay Timing Parameters: Pixel Clock, Blanking, and Sync
Timing parameters are usually learned by accident, when an image appears shifted or a panel refuses to lock. The parameters themselves are simple: a…
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SPI vs I2C for Small Displays: Bandwidth and Real-World Limits
Small displays sit on two very different serial buses. SPI moves pixel data at high speed over four wires; I2C moves modest amounts of…
Read the noteBonded vs Air-Gap Displays: Contrast, Durability, and Cost
The gap between an LCD and its cover glass is a design decision, not a default. An air gap leaves two reflective surfaces between…
Read the noteTouch Interfaces Compared: I2C vs USB vs SPI
The touch controller reports coordinates over one of three host interfaces—I2C, USB, or SPI. All three work; the right one depends on your host…
Read the noteHigh Brightness Medical Displays for Surgery and Imaging
Medical imaging displays have a requirement that industrial screens rarely face: the image must be trustworthy enough for a clinical decision. Brightness matters, but…
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