Electronic Display Retaining Identification After Power Off
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Solution Overview
Problem
Existing wireless audio transmission systems for stage equipment face challenges in identifying and associating mobile devices like wireless microphones and body-pack transmitters when they are switched off, as the display information is not visible, leading to labor-intensive and error-prone manual identification methods.
Innovation Solution
Implementing a display technology that continues to show alphanumeric or graphic identification information even when the power is switched off, using electronic paper or a dedicated power supply to maintain the display for several hours, allowing easy identification of devices without needing to turn them on.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices are switched off for secure safekeeping or charging, then security and battery maintenance are improved, but identification information becomes invisible and manual identification becomes labor-intensive and error-prone
Solution Approach 1:
The display is prepared in advance to show identification information that will remain visible even after the device is switched off. This preliminary preparation ensures that when devices need to be switched off for security or charging, the identification information is already in place and remains accessible without requiring the device to be powered on.
Solution Approach 2:
An intermediary power supply mechanism (such as a capacitor or small battery) is introduced that can independently power the display for a specific period after the main power is switched off. This intermediary element allows the display to remain visible as a mediator between the switched-off state and full power-on state, enabling identification without requiring the main device to be active.
2Measurement precision
If all mobile devices are switched on to read display information, then identification accuracy is improved, but energy consumption increases and time is lost switching devices on and off
Solution Approach 1:
The display information is prepared and made visible in advance before the device is switched off. This preliminary action ensures that identification can occur without needing to power on the device, thereby maintaining identification accuracy while avoiding the energy consumption and time loss associated with switching devices on and off.
Solution Approach 2:
Instead of continuous power consumption to maintain display visibility, the system uses periodic or temporary power supply (through capacitors or small batteries) that provides power only for the display function for a limited period after main power off. This reduces overall energy consumption while maintaining the ability to read identification information when needed.
3Ease of operation
If manual identification using hand-written stickers is used, then device identification is possible when switched off, but the process becomes labor-intensive and prone to errors such as stickers coming loose or being swapped
Solution Approach 1:
The mechanical system of hand-written stickers is replaced with an electronic display system. The display provides identification information in a controlled, error-free manner that cannot be easily misplaced, swapped, or become illegible. This substitution maintains the ability to identify devices when switched off while eliminating the reliability issues associated with manual sticker-based identification.
Data Source
AI summary
For mobile devices used in a wireless audio transmission system, for example for stage technology, like wireless microphones, body-pack transmitters with an audio input, and body-pack receivers with an audio output, electronic displays are known, on which a respective radio frequency or radio channel in use or other alphanumeric information is displayed. This information can be input at the transmitting end, for example, at a central location like a mixing desk. The displays, however, only function while the mobile devices are switched on so that it is not possible to see the association(s) of the mobile device(s) in their switched-off state. For improved identification of wireless microphones, body-pack transmitters, or body-pack receivers in which an automatic alphanumeric identification of the transmission channel in use is displayed in the switched-on state, according to the invention the display of the identification is retained even after the microphone, body-pack transmitter or body-pack receiver is switched off. In this way, mobile devices can be associated with a radio transmission path, an artist or a stage position even in the switched-off state.