Infrared illumination is an integral part of most modern video surveillance systems, providing visibility in complete darkness. However, there are situations when the standard photo sensor algorithm fails or simply doesn't meet the user's specific requirements. For example: IR LEDs They can create flare on the lens when shooting through glass or reveal the camera's presence in hidden installations. Understanding how to operate this component is critical for proper equipment setup.
Owners often encounter problems with their cameras failing to switch to night mode during the day or, conversely, flashing red when it shouldn't. This can be caused by a software glitch or by the device's location. In this article, we'll explore all possible methods for forced control. infrared radiation, from standard settings in the application to complex manipulations with configuration files.
It's important to note that turning off the backlight completely will prevent the camera from shooting in the dark unless external lighting is provided. Therefore, before making any changes, be sure to clearly understand the consequences. night visibilityWe'll cover methods for different device types, including popular brands and universal ONVIF protocols.
Hardware methods and physical shutdown
The most radical, but sometimes the only possible, method is physical interference with the device's circuit board. In many budget Wi-Fi camera models, the manufacturer doesn't provide a software option to disable the IR mode, considering it a mandatory feature. In such cases, users resort to disassembling the body and disconnecting the cable leading to the LED ring. This requires care, as it can damage the matrix or compromise the housing's seal.
Another hardware intervention option involves covering the photo sensor. This small component is responsible for detecting light levels and switching the camera to night mode. If you cover the sensor with black electrical tape, the camera will "think" it's the middle of the night and turn on the backlight. If you need to turn it off during the day when it's on due to an error, shielding the sensor itself can sometimes help. photodetector from extraneous light sources that may interfere with the automation.
⚠️ Please note: Opening the camera case almost always voids the warranty. Be prepared for the possibility that after attempting to repair the device yourself, the service center may refuse to service the device.
There are also models where the backlight power control is located on a separate connector inside the case, often marked as IR CUT or LEDBy disconnecting this connector, you physically break the power supply circuit for the LEDs. However, on modern compact "dome" or "lamp" cameras, such luxury is rare, and the boards are monolithic, which makes soldering the only way out.
Configuration via web interface and cloud applications
Most modern IP cameras have built-in software that allows for flexible image settings. Accessing advanced settings usually requires logging in through a browser using the device's IP address. In the menu, you'll need to find a section often referred to as Image Settings, Video & Audio or Day/Night ConfigThis is where the keys to controlling IR illumination lie.
In the standard interface you may come across the option IR Mode (IR mode). The options available here are Auto, On, and Off. Selecting the mode Off It forcibly dims the LEDs, but, as mentioned earlier, makes night photography impossible. Some advanced models allow you to adjust the light threshold (Lux) at which the switch is triggered.
Cloud applications such as Tuya Smart, V380 or Yoosee, these settings are often hidden deep in the menu. Look for items like "Basic Image Settings" or "Infrared Filter." If the app doesn't have such an option, it doesn't mean it doesn't exist—the manufacturer may have simply hidden it to simplify the interface, and in that case, you'll need to access it through web configurator.
Using the ONVIF protocol and third-party software
If native software doesn't provide the required capabilities, a universal protocol comes to the rescue ONVIFThis is the standard for interaction between IP cameras and video recorders. By connecting the camera to the computer using programs like ONVIF Device Manager (ODM), you gain access to hidden device features that the manufacturer may not have included in the user interface.
In the ONVIF Device Manager program, after connecting to the camera, you need to go to the section Video -> Image SettingsHere you'll often find a slider or switch for IR illumination. Changes are applied instantly. This is one of the most reliable methods, as it accesses the device's drivers directly, bypassing mobile app limitations.
- 🔍 Download and install the utility ONVIF Device Manager on PC.
- 🔌 Make sure the camera and computer are on the same subnet.
- 🔑 Enter your camera login and password (often admin/12345 or admin/admin).
- ⚙️ Go to your video stream profile and find the settings Image.
It's worth noting that not all cameras correctly implement the ONVIF standard. In some cases, the command to turn off the backlight may be ignored by the firmware. There's also a risk that after a reboot, the camera will reset the settings obtained through third-party software, reverting to factory defaults. automation.
What should I do if the camera is not visible in ONVIF Device Manager?
Check that ONVIF support is enabled in the camera settings (sometimes it needs to be activated manually). Also, make sure your antivirus or Windows Firewall isn't blocking the connection. Try temporarily disabling protection to test.
Working with configuration files and Telnet
For advanced users who aren't afraid of the command line, there is access via the protocol TelnetThis method allows you to make changes directly to the camera's file system. Telnet access activation depends on the camera model: sometimes, creating an empty file with a specific name on the memory card is sufficient, while other times, a specific set of actions is required upon startup.
After connecting via a terminal (using PuTTY or similar) with root privileges, you'll gain access to the Linux console where the camera runs. You'll need to find the configuration file, often called config.ini, system.conf or located in the directory /etc/. This file is searched for parameters related to ir_led, night_mode or light_sensor.
# Approximate path to settings in the file system/mnt/mtd/Config/Account1
/mnt/mtd/Config/Video/VideoEnc[0].conf
By changing the value of a parameter (for example, from 1 on 0) and after saving the file, you need to reboot the device with the command rebootThis method provides maximum control, but carries high risks. A syntax error or changing the wrong byte can brick the device, after which it can only be restored by reflashing it with a programmer.
⚠️ Important: Telnet interfaces and commands are unique to each chipset (Hi3518, GK7102, etc.). Do not use commands from instructions for other models without first reviewing the documentation.
Specifics of popular brands and models
Different manufacturers take different approaches to implementing backlight control. For example, in cameras Hikvision And Dahua (and their OEM counterparts) the setting is often located in the menu Configuration -> Image -> Display SettingsThere you can not only turn off the IR, but also set up a schedule or dependency on other events.
Cheap Chinese cameras with chips Goke or Ingenic, working through applications V380 or ICSee, often have a hidden engineering menu. It's accessed by pressing buttons in the app or entering a special code in the device's search field. In such models, turning off the backlight can be accomplished by changing a parameter. Flip/Mirror, which is strange, but sometimes occurs in firmware.
Below is a table to help you navigate the typical locations of settings for different ecosystems:
| Brand/Platform | Setting location | Parameter | Peculiarities |
|---|---|---|---|
| Hikvision / HiLook | Web -> Config -> Image | IR Light | There is a work schedule |
| Dahua / Lite | Web -> Camera -> Condition | IR Control | Adjusting sensitivity |
| Tuya / Smart Life | App -> Settings (gear) | Night Vision | Often only Auto/Off |
| Generic (V380) | Web interface | LED Control | Admin password required |
Problems with reflection and "glare"
Users often want to turn off the backlight not completely, but because it creates glare. This happens when the camera is installed too close to a wall, ceiling, or corner. The infrared rays reflect off the surface and back into the lens, creating a white spot that renders the image useless. In this case, completely disabling the IR doesn't solve the problem if the room is dark.
The solution is correct adjustment Camera. You need to increase the distance to the reflective surface or change the angle. If the camera has a pan/tilt mechanism, try moving it slightly to the side. Using a visor or curtain to physically block the direct path of the LED beams to the lens also helps.
- 🧱 Move the camera away from the wall by at least 15-20 cm.
- 🎯 Change the angle of inclination to eliminate a straight bounce.
- 🌑 Use a black marker to color the LEDs that are shining directly (if there are many of them).
In some cases, applying black electrical tape to the portion of the IR filter in front of the lens can help, creating an artificial shadow at the top of the frame. This requires some experimentation, but it allows you to preserve the functionality of night photography while eliminating specific glare.
Frequently Asked Questions (FAQ)
Why does the camera click when turning the backlight on and off?
This clicking sound is produced by a mechanical IR cut filter (ICR). During the day, it covers the sensor, allowing only visible light to pass through, and at night, it retracts, allowing IR radiation to be captured. The clicking sound is normal. If the clicking becomes constant, the light sensor may be dirty or the ambient light level may be at a critical level.
Is it possible to replace the IR LEDs with more powerful ones?
Theoretically, yes, but this requires resoldering and, more importantly, replacing the current-limiting resistors on the board. Simply replacing the diodes with more powerful ones without changing the power supply circuit will lead to their rapid burnout or overheating of the board. Furthermore, the beam angle of the new diodes may not match the viewing angle of the lens.
The camera turned on the backlight during the day, even though it was bright. What should I do?
Most likely, the photo sensor is dirty or clogged. Check the front panel of the camera for dust, cobwebs, or water droplets. Sometimes the sensor gets stuck in one position due to a software reset—try resetting the camera to factory settings through the hole in the case.
Does turning off IR illumination affect picture quality during the day?
No, it doesn't. During the day, the IR filter (the glass in front of the sensor) blocks the infrared spectrum to ensure natural colors. The backlight simply doesn't contribute to image formation during this time, even if it's technically "on" in the settings, but is blocked by the algorithm.