Backlight Module Charging Indication via Frequency Division
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Solution Overview
Problem
Current electronic devices lack charging indication when the battery power is insufficient for startup, making it difficult for users to determine if the device is charging and preventing successful startup, especially since many devices do not have indication lights.
Innovation Solution
A charging indication apparatus that includes a backlight module, frequency dividing unit, and backlight controller, which divides a switching signal to generate a frequency signal to control the backlight module to emit a charging indication signal, allowing the device to indicate charging state even at low power levels without requiring additional components for complex patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional chips and LCD panels are used to control charging indication, then charging status can be indicated, but manufacturing cost increases and image distortion may occur
Solution Approach 1:
The patent merges the charging indication function with the existing backlight module that is already present in the electronic device. Instead of adding separate indication components, the invention utilizes the existing backlight hardware to display charging status through frequency-modulated blinking patterns, thereby eliminating the need for additional chips and panels while reducing system complexity
Solution Approach 2:
The existing backlight module, originally designed for display illumination, is given multiple functions by enabling it to indicate charging status through controlled blinking patterns. This multi-functionality approach allows the same hardware component to serve both illumination and indication purposes, avoiding additional components and reducing manufacturing costs
2Loss of information
If battery power is below threshold, then device cannot startup, but charging should still be indicated to user
Solution Approach 1:
The patent employs periodic blinking actions of the backlight module to indicate charging status. By using frequency-modulated blinking patterns (different frequencies for different charging states), the system communicates charging information through time-based periodic signals rather than continuous illumination, minimizing energy consumption while effectively conveying status information to the user
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the electronic device to indicate charging state at low power levels, reducing manufacturing costs by eliminating the need for additional chips to control LCD panels and preventing distorted images, while ensuring users can determine charging status and initiate startup.
Implementation Method 1
The frequency dividing unit divides a switching signal for controlling an operation frequency of the power conversion circuit to generate a divided frequency signal
Implementation Method 2
The backlight module includes a plurality of light emitting diode (LED) units, and the backlight controller includes a driving unit and a plurality of switches. The driving unit is coupled to the LED units and drives the LED units to emit the backlight source
Data Source
AI summary
A charging indication apparatus and a method thereof are provided. A switching signal for controlling an operation frequency of a power conversion circuit is divided to obtain a divided frequency signal, and according to the divided frequency signal, a backlight module is controlled to emit a backlight source serving as a charging indication signal.