Battery-Integrated LED TV with Smart Power Management for Panel Protection and Voltage Stabilization

LED TVs provide crystal-clear image quality and are energy-efficient, but are not free from voltage fluctuations, voltage spikes and power losses that can cause great damage to these TVs, especially in the areas where the power supply is not stabilized. These power problems can result in image quality degradation, flicker or permanent damage to the LED panel. In this paper, a novel power architecture is proposed where a rechargeable lithium-ion battery and an intelligent power management system are built within the LED TV frame. Unlike previous works, which either need infrastructure for solar power, or access to an external UPS unit, or partial battery EMI shielding, this is the first embedded system that offers sub-millisecond switching, adaptive brightness control and full battery management inside the television chassis. The system contains an AC-DC charger, bi-directional DC-DC converters, a microcontroller unit (MCU), a high-speed switchover circuit (HSSC) composed of MOSFETs and a reliable Battery Management System (BMS). Features include adaptive load management, undervoltage protection and soft start to reduce inrush current. Simulation results by using LTSpice and Proteus confirm that the system can achieve the switchover latency of less than 1 ms, keep the panel voltage within the range of ±0.5% during voltage sags and surges, and prolong the backup operation time of up to 2 hours for a 32″ LED panel. This integrated solution removes the requirement to use separate UPS systems, increases reliability and also enables future integration with renewable sources like rooftop solar. The architecture fits with the trends that have been emerging towards low voltage DC, smart grid standard and embedded energy resilience of consumer electronics appliances.