Backlight Timing Control for High-Refresh Display Synchronization

Solution Overview

Problem

Existing display technologies struggle to maintain synchronization between image rendering and backlight adjustment, particularly in high-refresh-rate virtual reality devices, leading to ghosting and inconsistent brightness, which affects contrast and visual quality.

Innovation Solution

A method for adjusting backlight by determining and updating backlight data corresponding to the current image, controlling the backlight driver chip to turn on the backlight source based on the image data, and compensating for refresh rate changes with delayed backlight data updates to ensure synchronization and consistent brightness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the refresh rate of the display screen is increased to achieve a three-dimensional display effect, then the display quality and three-dimensional effect are improved, but the synchronization between image rendering and backlight adjustment becomes difficult to maintain, leading to ghosting and inconsistent brightness

Engineering Contradiction:

Improverefresh rateVSAvoidsynchronization between image rendering and backlight adjustment

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by calculating and preparing the backlight data in advance based on the current image data before the actual backlight adjustment occurs. The processing unit calculates backlight data corresponding to the current image, and the display driver chip stores this prepared data, ensuring that when the backlight needs to be adjusted, the data is already ready, thus maintaining synchronization even at high refresh rates

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by continuously monitoring the display screen's rendering process and adjusting the backlight data accordingly. The processing unit receives image data from the display screen, calculates corresponding backlight data, and feeds this back to the backlight driver chip for adjustment, creating a closed-loop control system that maintains synchronization between image rendering and backlight changes

Inventive Principle:

Principle #23Feedback

2Speed

If the backlight data is updated immediately without delay, then the response speed is improved, but the brightness consistency and contrast are compromised due to unsynchronized backlight and image display

Engineering Contradiction:

Improvebacklight data update speedVSAvoidbrightness consistency and contrast

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by calculating and preparing the backlight data in advance based on the current image data before the actual backlight adjustment occurs. The processing unit calculates backlight data corresponding to the current image, and the display driver chip stores this prepared data, ensuring that when the backlight needs to be adjusted, the data is already ready, thus maintaining synchronization even at high refresh rates

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by making the backlight adjustment timing flexible rather than fixed. The system dynamically determines when to update the backlight based on the image rendering process, using a first preset duration delay that allows the backlight to be adjusted at the optimal moment for brightness consistency and contrast, rather than immediately or at fixed intervals

Inventive Principle:

Principle #15Dynamics

3Manufacturing precision

If the backlight adjustment is delayed to ensure synchronization, then the brightness consistency and contrast are improved, but the response time and processing speed are increased

Engineering Contradiction:

Improvebrightness consistency and contrastVSAvoidbacklight data processing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by calculating and preparing the backlight data in advance based on the current image data before the actual backlight adjustment occurs. The processing unit calculates backlight data corresponding to the current image, and the display driver chip stores this prepared data, ensuring that when the backlight needs to be adjusted, the data is already ready, thus maintaining synchronization even at high refresh rates

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by making the backlight adjustment timing flexible rather than fixed. The system dynamically determines when to update the backlight based on the image rendering process, using a first preset duration delay that allows the backlight to be adjusted at the optimal moment for brightness consistency and contrast, rather than immediately or at fixed intervals

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20260024504A1Backlight adjustment method, and medium and electronic device

Publication Date: 2026.01.22 BEIJING BOE TECH DEV CO LTD

AI summary

Provided is a method for adjusting backlight, including: when rendering a current image, determining backlight data corresponding to the current image; when transmitting the current image, updating, upon transmitting the current image for a first preset duration, the backlight data corresponding to the current image to a backlight driver chip; and when the updating of the backlight data corresponding to the current image is completed, controlling the backlight driver chip to turn on a backlight source, and adjusting backlight brightness based on the backlight data of the current image.