Shutter Control in Stereoscopic Display for Luminance Preservation
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Solution Overview
Problem
Existing 3D image displaying apparatuses face issues with luminance reduction when adjusting color temperature, leading to a less vivid video experience due to the need to restrict luminance adjustments.
Innovation Solution
An image displaying apparatus with a signal control unit for alternately displaying right-eye and left-eye images, a display panel, a surface light source, a shutter control unit for adjusting shutter-opened periods, and a surface light source control unit that emits light for a shorter period than the shutter-opened period, allowing for optimal color adjustment without significant luminance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If color temperature is corrected at the display side by restricting luminance, then color temperature adjustment is achieved, but luminance of the image is lowered
Solution Approach 1:
The patent applies periodic action by controlling the surface light source to emit light in periodic pulses that are synchronized with the shutter-opened periods. The light source emits during specific time windows when the shutters are open, creating a temporal pattern that allows color temperature adjustment without continuous luminance restriction. This periodic emission enables color correction while maintaining overall image luminance through timing optimization.
Solution Approach 2:
The patent changes the timing parameter of light emission rather than continuously adjusting luminance intensity. By modifying the emission timing of the surface light source to coincide with shutter-opened periods, the system achieves color temperature correction through temporal parameter adjustment instead of intensity reduction, thereby maintaining vivid image luminance while achieving desired color temperature.
2Temperature
If luminance is restricted to adjust color temperature, then color temperature control is achieved, but video vividness decreases
Solution Approach 1:
The surface light source emits light periodically during shutter-opened periods rather than continuously. This periodic emission pattern allows color temperature adjustment while maintaining high luminance during the actual display periods, preserving video vividness. The timing-synchronized emission ensures that color correction occurs without sacrificing image quality or visual impact.
3Temperature
If shutter-opened period is extended to improve color adjustment, then color temperature control improves, but luminance decreases due to longer restriction periods
Solution Approach 1:
The system uses periodic light emission during shutter-opened periods to achieve color temperature adjustment. By synchronizing the surface light source emission with the periodic shutter operation, the system can extend or adjust the opened period for color control without proportionally increasing luminance loss, as light is only emitted during the necessary time windows when shutters are open.
Solution Approach 2:
The patent adjusts the timing parameter of light emission to match shutter-opened period duration. By changing the emission timing and duration parameters of the surface light source to correspond with shutter operation, the system achieves color temperature control while minimizing luminance restriction, as light is emitted only when needed for color adjustment during the shutter-opened periods.
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
The solution effectively restricts luminance decrease and optimally adjusts image color, ensuring a vivid video experience by synchronizing shutter-opened periods with light emission timing based on user input for color temperature adjustments.
Implementation Method 1
a surface light source for illuminating the display panel from its back
Implementation Method 2
a pair of glasses including liquid crystal shutters driven in synchronization with the predetermined period
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
An image displaying apparatus includes a signal control unit (120) for receiving an input image signal and converting the signal into a signal for alternately displaying a right-eye image and a left-eye image, display panel (134) into which the signal converted in the signal control unit (120) is input for the right-eye image and the left-eye image, a surface light source (136) for illuminating the display panel (134) from its back, a shutter control unit (122) for generating a timing signal indicating a period in which the right-eye and left-eye shutters (200a, 200b) are opened for a pair of viewing glasses (200) with the right-eye and left-eye shutters (200a, 200b), and for relatively changing the shutter-opened period for the emission timing of the surface light source (136), and a surface light source control unit (128) for emitting the surface light source (136) in a shorter period than the shutter-opened period in response to the switching between the right-eye image and the left-eye image.