Power Management and Screensaver Configuration

For 24/7 display operation, power management and burn-in prevention are critical for longevity and reliability. This guide shows optimal configurations.

Understanding Burn-In Risk

What is Burn-In?

Burn-in occurs when static image elements leave permanently visible shadows.

OLED Displays (High Risk):

Organic pixels degrade at different rates

Static elements burn in within 100-1000 hours

Particularly susceptible: White and blue pixels

Irreversible damage

LCD Displays (Lower Risk):

Image retention (temporary) instead of true burn-in

Can usually be fixed through pixel refresh

Occurs after 2000-5000 hours

Usually reversible

IPS-LCD (Recommended for Digital Signage):

Very low burn-in risk

Better viewing angles than TN panels

Longer lifespan

Ideal for 24/7 operation

Vulnerable Areas in LobbyFlight

Highest risk (permanently visible):

Header with hotel logo

Tab bar (Departures/Arrivals)

Time display

Status badges (On Time, Delayed)

Medium risk (often visible):

Airport codes

Gate numbers

Airline names

Low risk (changes frequently):

Flight times

Flight numbers

Weather data

Burn-In Prevention Strategies

1. Automatic Content Rotation

LobbyFlight already rotates between:

Departures ↔ Arrivals (every 30 sec)

Optional: Hotel info slides

This reduces static display by 50%

2. Pixel Shift (Hardware)

Modern displays slightly shift the image:

1-2 pixels in all directions

Every 10-30 minutes

Not noticeable to users

3. Reduced Brightness

OLED: Max 60% brightness

LCD: Max 80% brightness

Night: 30-40% sufficient

4. Dark Themes

Black background on OLED saves energy

Dark colors reduce pixel stress

LobbyFlight already uses dark theme

Android Display Settings

Basic Display Configuration

Optimal Brightness Settings

Navigation: Settings → Display → Brightness

Recommended values:

LCD Displays:
- Day (6:00-22:00): 70-80%
- Evening (22:00-24:00): 50%
- Night (0:00-6:00): 30%

OLED Displays:
- Day: 50-60%
- Evening: 40%
- Night: 20-30%

Disable Adaptive Brightness:

Settings → Display → Adaptive Brightness → OFF

Reason: Inconsistent brightness disturbs guests

Manual control preferred

Prevent Display Timeout

Navigation: Settings → Display → Screen timeout

Options:
- Screen timeout: "Never" or Maximum (30 min)
- Screen saver: Disabled
- Daydream: OFF

Alternative via ADB:

adb shell settings put system screen_off_timeout 2147483647

Blue Light Filter Settings

Navigation: Settings → Display → Night Light/Blue Filter

Recommendation: DISABLED

Why?

Distorts brand colors

Makes display yellowish

Irritates guests during daytime

Exception: Displays in sleeping areas (night operation)

Power Saving Settings

Disable Battery Optimization

For Fully Kiosk Browser:

Settings → Apps → Fully Kiosk Browser

Battery → Battery optimization

Select "Don't optimize"

For Chrome:

Settings → Apps → Chrome

Battery → Allow background activity

Disable optimization

Why important?

Prevents app sleep mode

Guarantees constant performance

No unexpected restarts

Disable Doze Mode

Android's Doze Mode can disrupt kiosk operation.

Disable via ADB:

# Completely disable Doze Mode
adb shell dumpsys deviceidle disable

# Whitelist specific app
adb shell dumpsys deviceidle whitelist +com.fullykiosk.browser

Via Developer Options:

Enable Developer Options (tap Build number 7 times)

"Standby apps" → Fully Kiosk → "Active"

WiFi Optimization

Navigation: Settings → WiFi → Advanced

Important settings:
✓ Keep WiFi on during sleep: ALWAYS
✗ WiFi scanning: OFF (saves energy)
✗ Auto-switch to mobile data: OFF
✓ Network notification: OFF

WiFi power saving mode via ADB:

# WiFi always active
adb shell settings put global wifi_sleep_policy 2

Fully Kiosk Screensaver Configuration

Screensaver Basics

Navigation: Fully Kiosk → Settings → Screensaver

Option A: Black Screen (Maximum Burn-In Protection)

Enable Screensaver: ON
Screensaver Timer: 600 seconds (10 minutes)
Screensaver Type: Black Screen
Brightness in Screensaver: 0%
Show Clock: OFF
Wake Screen on Motion: ON (if camera available)

Advantages:

Best burn-in prevention

Maximum energy savings

OLED pixels completely off

Disadvantages:

Display appears "turned off"

Guests might think it's broken

Option B: Dim Mode (Recommended for Lobbies)

Enable Screensaver: ON
Screensaver Timer: 900 seconds (15 minutes)
Screensaver Type: Dim Screen
Dimming Level: 20%
Keep Content Visible: ON
Screensaver Overlay: None

Advantages:

Flight data remains visible

Reduced brightness protects display

Guests see system is running

Disadvantages:

Less burn-in protection

Higher energy consumption

Option C: Moving Content (For OLED)

Enable Screensaver: ON
Screensaver Timer: 600 seconds
Screensaver Type: Website
URL: https://yourdomain.com/screensaver
Motion: Slow Drift
Movement Range: 50 pixels

Create custom screensaver page:

<!DOCTYPE html>
<html>
<head>
  <style>
    body {
      background: black;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    #content {
      animation: drift 60s infinite;
    }
    @keyframes drift {
      0%, 100% { transform: translate(0, 0); }
      25% { transform: translate(30px, -30px); }
      50% { transform: translate(-30px, -30px); }
      75% { transform: translate(-30px, 30px); }
    }
    .clock {
      color: #333;
      font-size: 4em;
      font-family: monospace;
    }
  </style>
</head>
<body>
  <div id="content">
    <div class="clock" id="clock"></div>
    <img src="/logo-dark.png" style="opacity: 0.1">
  </div>
  <script>
    setInterval(() => {
      document.getElementById('clock').textContent =
        new Date().toLocaleTimeString('en-US')
    }, 1000)
  </script>
</body>
</html>

Motion Detection (Plus Version)

Fully Kiosk Plus Version only

Navigation: Settings → Motion Detection

Enable Motion Detection: ON
Camera for Detection: Front Camera
Detection Mode: Motion
Sensitivity: Medium (3-5)
Turn Screen On on Motion: ON
Turn Screen Off Delay: 600 seconds
Detection Schedule: 06:00 - 22:00

Testing motion detection:

Wave hand in front of camera

Screen should wake up

Adjust sensitivity if too slow/sensitive

Privacy notice:

No recording, only motion detection

Notice still recommended

"This display uses motion detection"

Scheduled Brightness

Fully Kiosk Brightness Scheduler

Navigation: Settings → Scheduled Actions

Time-Based Brightness

Morning (6:00) - Full brightness:

Action: Set Screen Brightness
Brightness: 80%
Time: 06:00
Days: All Days

Noon (12:00) - Maximum for sunlight:

Action: Set Screen Brightness
Brightness: 100%
Time: 12:00
Days: All Days

Evening (18:00) - Reduce:

Action: Set Screen Brightness
Brightness: 60%
Time: 18:00
Days: All Days

Night (22:00) - Dim:

Action: Set Screen Brightness
Brightness: 30%
Time: 22:00
Days: All Days

Late night (1:00) - Minimum:

Action: Set Screen Brightness
Brightness: 15%
Time: 01:00
Days: All Days

Alternative: Tasker Automation

For extended automation:

Create Tasker profile:

Profile: Lobby Hours
Time: 6:00 - 22:00
Task:
  - Display Brightness: 75%
  - Screensaver: Disabled

Profile: Night Mode
Time: 22:00 - 6:00
Task:
  - Display Brightness: 30%
  - Screensaver: 5 min timeout
  - Notification Volume: 0

Ambient Light Sensor (if available)

Some displays have light sensors:

// JavaScript for adaptive brightness
if ('AmbientLightSensor' in window) {
  const sensor = new AmbientLightSensor()
  sensor.onreading = () => {
    const lux = sensor.illuminance
    let brightness = 50 // Default

    if (lux < 50) brightness = 30      // Dark
    else if (lux < 200) brightness = 50 // Dim
    else if (lux < 500) brightness = 70 // Normal
    else brightness = 90                // Bright

    setBrightness(brightness)
  }
  sensor.start()
}

Nightly Restart

Why Daily Restart is Important

Clear memory leaks:

Browser memory grows over time

JavaScript garbage collection incomplete

Android system cache grows

Restore performance:

Fresh start = optimal speed

Temporary files deleted

Network stack reset

Reload Service Worker:

Current version guaranteed

Cache consistency

Offline data updated

Fully Kiosk Auto-Restart

Navigation: Settings → Scheduled Actions

Action Type: Restart Application
Time: 04:00
Days: All Days
Enabled: YES
Clear Cache on Restart: YES

Alternative times by hotel type:

Business Hotel: 03:00 (before early checkouts)

Vacation Hotel: 05:00 (consider late guests)

Airport Hotel: 04:30 (between night and morning flights)

System-Level Restart (Android)

Via ADB command:

# Set up cron job on server
adb connect [display-ip]:5555
adb shell reboot

Via Root (if available):

# In Fully Kiosk Terminal
su
reboot

Hardware-Based Restart (Smart Plug)

Kasa Smart Plug Schedule:

Schedule 1: Power OFF
Time: 04:00
Duration: 30 seconds

Schedule 2: Power ON
Time: 04:00:30
Action: Turn On

Advantages:

100% reliable

Works on system freeze

Remote management possible

Power consumption monitoring

Setup with Home Assistant:

automation:
  - alias: "Display Daily Restart"
    trigger:
      platform: time
      at: "04:00:00"
    action:
      - service: switch.turn_off
        entity_id: switch.display_plug
      - delay: "00:00:30"
      - service: switch.turn_on
        entity_id: switch.display_plug

Monitoring and Notifications

Fully Kiosk Remote Admin

Set up access:

Settings → Remote Administration → Enable

Set password

Note IP address

Web interface: http://[display-ip]:2323

Available functions:

Live screenshot

Remote control

Settings changes

Restart/Reload

JavaScript console

System information

Health Monitoring

What to monitor:

Critical:
- Display online status
- Last successful data update
- CPU temperature (< 70°C)
- Memory usage (< 80%)

Warning:
- Uptime > 7 days (restart needed)
- Cache size > 200MB
- Error rate > 5%
- WiFi signal < -70dBm

Set Up Alert System

Option 1: Fully Kiosk Cloud (Plus):

Automatic monitoring

Push notifications on offline

Centralized management of multiple displays

Option 2: Custom Monitoring:

# Python monitoring script
import requests
import smtplib
from email.mime.text import MIMEText

DISPLAYS = [
  {"name": "Lobby", "ip": "10.0.0.101"},
  {"name": "Reception", "ip": "10.0.0.102"}
]

for display in DISPLAYS:
    try:
        r = requests.get(f"http://{display['ip']}:2323/api/status",
                        timeout=5, auth=('admin', 'password'))
        if r.status_code != 200:
            send_alert(f"Display {display['name']} not responding")
    except:
        send_alert(f"Display {display['name']} offline")

Performance Metrics

KPIs to track:

Daily:
- Restart Success Rate (Target: 100%)
- Average CPU Usage (Target: < 40%)
- Memory Usage Trend
- Cache Hit Rate

Weekly:
- Total Downtime (Target: < 10 min)
- Error Count
- WiFi Disconnections
- Temperature Max Values

Monthly:
- Brightness Hours (for burn-in calculation)
- Power Consumption (kWh)
- Software Update Status

Best Practices Summary

For OLED Displays

Brightness: Max 60% daytime, 20% night

Screensaver: Black screen after 10 min

Pixel shift: Enable if available

Content: Maximum rotation, dark themes

Restart: Daily mandatory

For LCD Displays

Brightness: 80% daytime, 40% night

Screensaver: Dim to 20% after 15 min

Backlight: Check for even illumination

Content: Standard rotation sufficient

Restart: Daily recommended

For Energy Efficiency

Scheduled brightness: -40% power consumption

Screensaver: -60% during inactivity

Motion detection: Active only when needed

Hardware: Energy Star certified displays

Network: Ethernet instead of WiFi (-10W)

For Longevity

Temperature: < 35°C environment

Humidity: 20-80%

Direct sunlight: Avoid

Cleaning: Weekly with microfiber cloth

Updates: Monthly security updates

Troubleshooting

Display Turns Off

Diagnosis:

Check power settings

Verify Fully Kiosk "Keep Screen On"

Android Doze Mode status

Solution:

# Keep permanently awake
adb shell svc power stayon true

Burn-In Already Visible

Immediate measures:

Reduce brightness to minimum

Run pixel refresh (if available)

Inverse colors for 24h

Shift content position

Long-term: Plan display replacement

Overheating

Symptoms:

Display dims automatically

Performance issues

Spontaneous restarts

Solutions:

Reduce brightness

Better ventilation

External cooling system

Change display location

Screensaver Not Activating

Diagnostic steps:

Check timer setting

Disable motion detection

Debug touch events

Check JavaScript errors

Fix: Clear Fully Kiosk cache and reconfigure

Power Management and Screensaver Configuration

Understanding Burn-In Risk

What is Burn-In?

Vulnerable Areas in LobbyFlight

Burn-In Prevention Strategies

1. Automatic Content Rotation

2. Pixel Shift (Hardware)

3. Reduced Brightness

4. Dark Themes

Android Display Settings

Basic Display Configuration

Optimal Brightness Settings

Prevent Display Timeout

Blue Light Filter Settings

Power Saving Settings

Disable Battery Optimization

Disable Doze Mode

WiFi Optimization

Fully Kiosk Screensaver Configuration

Screensaver Basics

Option A: Black Screen (Maximum Burn-In Protection)

Option B: Dim Mode (Recommended for Lobbies)

Option C: Moving Content (For OLED)

Motion Detection (Plus Version)

Scheduled Brightness

Fully Kiosk Brightness Scheduler

Time-Based Brightness

Alternative: Tasker Automation

Ambient Light Sensor (if available)

Nightly Restart

Why Daily Restart is Important

Fully Kiosk Auto-Restart

System-Level Restart (Android)

Hardware-Based Restart (Smart Plug)

Monitoring and Notifications

Fully Kiosk Remote Admin

Health Monitoring

Set Up Alert System

Performance Metrics

Best Practices Summary

For OLED Displays

For LCD Displays

For Energy Efficiency

For Longevity

Troubleshooting

Display Turns Off

Burn-In Already Visible

Overheating

Screensaver Not Activating

Was this article helpful?

In this article

Related Articles

Activate Kiosk Mode for 24/7 Operation

Configure Display Rotation and Auto-Refresh