Light Valve Array Shielding LCD Response Phase
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Solution Overview
Problem
Virtual reality systems using liquid crystal display (LCD) devices face a long response time, leading to image blurring and a poor user experience, especially when the user's head rotates rapidly, as the current LCD devices take 20-30 ms to respond, which is not sufficient for fast image changes.
Innovation Solution
A display device comprising a display array and a light valve array with a control device that controls sub light valves to switch between light-shielding and light-transmitting states based on the display operation phases of sub-pixels, ensuring the sub light valves are in a light-shielding state during the response phase and change to light-transmitting state only when the sub-pixels enter the display phase, thereby reducing blurring and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If LCD devices are used in virtual reality systems, then display quality and visual sense are improved, but response time is too long (20-30 ms) causing image blurring
Solution Approach 1:
The patent divides the display system into two independent arrays: a display array for showing images and a light valve array for controlling light transmission. Each array can be controlled independently, allowing the light valve array to compensate for the slow response of the LCD sub-pixels by shielding them during the response phase and only allowing light through when the sub-pixels have stabilized.
Solution Approach 2:
The light valve array acts as an intermediary between the backlight and the display array. By controlling the light transmission of the light valve array independently, it mediates the harmful effect of long sub-pixel response time, ensuring that users only perceive stable images rather than blurred transitions.
2Loss of time
If sub-pixels are updated rapidly to reduce response time, then image blurring is reduced, but the complexity of controlling multiple arrays increases
Solution Approach 1:
The light valve array is controlled in advance based on the scan signal timing. Before each sub-pixel is updated, the corresponding light valve is set to the appropriate state (shielding or transmitting), so that when the sub-pixel completes its response phase, the light valve is already in the correct state to display the updated image without blurring.
Solution Approach 2:
The control device monitors the scan signal and adjusts the light valve array states accordingly, creating a feedback mechanism that synchronizes the light valve control with the sub-pixel update process. This ensures coordinated operation of both arrays without excessive complexity.
3Object-affected harmful factors
If light valves shield sub-pixels during response phase, then image blurring is reduced, but the duration of light-shielding state increases
Solution Approach 1:
The light valve array operates in a periodic manner, switching between shielding and transmitting states synchronized with the scanning process. Each light valve shields during the response phase of its corresponding sub-pixels, then transmits during the display phase, creating a rhythmic cycle that minimizes blurring while maintaining display functionality.
Solution Approach 2:
Each light valve in the array can be independently controlled to shield or transmit light based on the specific needs of its corresponding sub-pixels. This local control allows precise timing of shielding duration for each region, optimizing the balance between preventing blurring and maintaining display duration.
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
This solution effectively reduces the blurring of images caused by long response times, enhancing the display quality and providing a more realistic experience in virtual reality environments by ensuring users only see the image after the sub-pixels have completed their response phase.
Implementation Method 1
allowing a sub light valve to be in a light-shielding state in a case where any sub-pixel in the at least one row of sub-pixels corresponding to the sub light valve is in a response phase
Data Source
AI summary
A driving method is configured to drive a display device, and the display device includes a display array and a light valve array. The display array includes rows of sub-pixels, the light valve array includes a plurality of sub light valves, a respective one sub light valve of the plurality of sub light valves corresponds to at least one row of sub-pixels, and the light valve array is on a light-emitting side of the display array. The driving method includes: any sub-pixel in the at least one row of sub-pixels being in a response phase of a display operation, the respective one sub light valve being in a light-shielding state, and the respective one sub light valve corresponding to the at least one row of sub-pixels.