OLED Display High-Brightness Mode Using Fewer Pulses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Many electronic devices with OLED displays face suboptimal battery life and increased display damage due to burn-in, as they lack a high-brightness mode that efficiently adjusts display properties, leading to unnecessary power consumption and imperceptible display artifacts.
Innovation Solution
Implementing a high-brightness mode on OLED displays by setting a high brightness value in a DDIC register, using a processor to provide a fewer-pulses command to adjust pulse number, and determining a new gamma correction to alter content presentation, which allows for longer pulse durations and lower amplitudes, reducing power consumption and extending display lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the OLED display is operated at high brightness using traditional pulse width modulation with many short pulses, then the display brightness is sufficient for outdoor visibility, but power consumption increases and the display is more susceptible to burn-in damage
Solution Approach 1:
The patent changes the pulse parameters from many short pulses to fewer long pulses. Specifically, it transitions from using a high number of pulses with short durations to a low number of pulses with long durations, while maintaining the same average brightness level. This parameter transformation reduces the peak current demands and allows for lower amplitude pulses, thereby reducing power consumption and heat generation that cause burn-in.
2Illumination intensity
If the OLED display is operated at high brightness using traditional pulse width modulation with many short pulses, then the display brightness is sufficient for outdoor visibility, but the display lifetime is reduced due to increased burn-in risk
Solution Approach 1:
The patent transforms the pulse waveform parameters by reducing the pulse frequency and increasing the pulse duration. This results in fewer switching cycles that stress the OLED pixels, reducing cumulative damage and burn-in risk. The longer pulse durations with lower amplitudes create a more stable electrical load on the display elements, improving reliability and extending display lifetime while maintaining adequate brightness levels.
3Device complexity
If a traditional display driver integrated circuit is used without a separate high-brightness mode, then the device structure remains simple, but display properties cannot be optimized for high brightness operation leading to suboptimal battery life
Solution Approach 1:
The patent makes the existing DDIC multi-functional by enabling it to operate in two distinct modes: a normal mode using traditional many-short-pulses PWM and a high-brightness mode using fewer-long-pulses PWM. The same hardware circuit can dynamically switch between these modes based on ambient lighting conditions, eliminating the need for separate dedicated hardware while optimizing power consumption and battery life across different operating scenarios.
Data Source
AI summary
This document describes techniques and apparatuses for a high-brightness mode on an organic light emitting diode (OLED) display. The techniques and apparatuses set a high-brightness value in a register of a display driver integrated circuit (DDIC) associated with the OLED display of on electronic device. A processor of the electronic device provides a fewer-pulses command to the DDIC, which adjusts a pulse number to control the OLED display at fewer pulses per period. A gamma correction is determined based on the high-brightness value and used to alter content to be presented on the OLED display. As a result, fewer pulses are used in combination with the gamma correction to provide content on the OLED display at a high brightness.