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Customization FAQ After-sales Service Download Center

Customization FAQ After-sales Service Download Center

FAQ: freezing, communication and ageing

Answers on unexplained freezes, intermittent communication and long-term ageing behaviour, including what the backlight and touch panel look like after several

FAQ: display, touch and thermal questions

Answers on brightness and viewing angle, touch type and sensitivity, and heat dissipation inside sealed cabinets, including how to calculate whether a display n

Industrial serial screen FAQ: questions and answers

A collected Q&A covering interface selection, brightness, touch technology, temperature ratings and customization, written for engineers who are specifying a di

Why industrial displays freeze, garble or fail from interference

Three symptoms, one family of causes: inadequate supply margin, poor grounding, and noise coupled into the communication cable. The article explains how to isol

Selection FAQ: immunity, stability and applications

Selection questions answered by application: what to prioritize for power equipment, what changes for outdoor cabinets, and how to compare suppliers when the da

Technical Q&A: ESD/EMC immunity and application questions

Collected answers on ESD and EMC performance, how the ratings are tested, what they mean for installation, and how the same display performs in power, medical a

Fixing a white screen

A white screen usually means the panel is powered but no image data is being written: check the project download, the start page setting and the ribbon connecti

LCD module interference and ESD problems in finished systems

This article explains LCD module behavior during system-level EMC/ESD testing: an LCD module is a passive input device without error correction - it accepts any timing-valid signal and cannot judge correctness, so wrong signals produce wrong commands or images; locate the interference source first,...

Fixing screen flicker

This section covers screen flicker: loose FPC connectors and oxidized sockets (check the serial cable and PCB yellow cable); insufficient power supply (measure voltage and current with a multimeter and select stable working values); software causes (failed kernel upgrades also flicker, usually toget...

Heroway serial screen FAQ: capacitive touch

This section covers capacitive touch issues: drift and insensitive touch caused by static or power ripple (stand on the earthed ground and hold the metal frame - improvement indicates static; a clean separate supply fixing it indicates MCU power interference): (1) add a Y capacitor, e.g. a 2KV 103 c...

Heroway serial screen FAQ: resistive touch

This section covers resistive touch issues: frame pressing (resistive touch is pressure-sensing single-point; loosen the frame screws, remove the bezel for isolated testing, and never add tempered glass on a resistive screen); misdiagnosing a communication problem as touch failure (audible click and...

Heroway serial screen control FAQ (4)

This section covers icon-variable display and progress bars: filtering the icon background color (the filter samples the first pixel at the top-left corner and removes identical colors; if filtering fails the background is not pure - zoom in with Paint to check); multiple buttons driving separate ic...

Heroway serial screen control FAQ (3)

This section covers QR-code and RTC widgets: QR code position on portrait screens (swap X/Y, e.g. 157,463 becomes 463,157); flickering QR code (format the flash, re-download, upgrade the kernel if needed, then check for subtle changes in the data itself); QR code not displaying or garbled (send ASCI...

Heroway serial screen control FAQ (2)

This section covers basic-graphics and curve display: why the first cut image disappears when cutting again (addresses are memory; the 0x82 command writes from the start address onward, so the next widget must not occupy previous addresses; plan address and data allocation clearly and send multiple...

Heroway serial screen control FAQ (1)

This section covers touch-widget issues: why basic touch cannot send a value (value sending works only inside pop-up menus/keyboards via the root address; menu key values 0000-00FE send, 00FF does not; use key-return or incremental-adjust widgets for direct value sending); touch areas cannot overlap...

Black screen: software causes

This section lists software causes of black screens: black screen after a kernel update (upgrade failed or wrong kernel for the model; SD-card failures must be upgraded via serial port, and the program file must match the screen model; on touch screens tap a non-touch area 20 times within 4 seconds...

Black screen: hardware causes

This section lists hardware causes of black screens: loose FPC connectors and oxidized sockets (check the serial cable, PCB yellow cable and socket); insufficient power supply (measure voltage and current with a multimeter); wrong 10-pin cable orientation (blue ends one up one down; after a socket c...

Smart serial screen FAQ: software

This section covers software issues on smart serial screens: JPG background images causing corruption (image over 32 KB, resolution mismatch or wrong mode configuration; set image size, resolution and display mode correctly); enabling the CFG checksum (0x20 with 0x5A5 marks the frame-format config v...

Smart serial screen FAQ: hardware

This section covers hardware selection for smart serial screens: capacitive vs resistive touch (capacitive offers better transmittance and finger experience but weaker noise immunity and stricter power requirements; Hywintek resistive screens are very sensitive, so resistive remains the recommended...

How to fix a garbled screen

This section summarizes screen-corruption (huaping) solutions: obvious bright/dark pixels (max 3 non-obvious defects per panel, 10% defect-rate limit; clustered defects require factory replacement); one-third to one-fifth of the panel corrupted after power-on (wrong configuration mode, e.g. R0=02 fo...

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