Semiconductor Device Emission Control Signal Timing
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Solution Overview
Problem
Existing display panel technologies, particularly self-luminous OLED panels, face challenges in controlling brightness levels effectively due to variations in light emission cycles, leading to potential flicker and undesired brightness changes.
Innovation Solution
A semiconductor device with circuitry that generates an emission control signal to manage light emission cycles within vertical sync periods, adjusting timing based on control cycles to maintain consistent brightness levels and prevent flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vertical sync period length is changed to adapt to different display requirements, then the adaptability of the display system is improved, but the timing synchronization between light emission cycles and vertical sync periods deteriorates, causing brightness variations and flicker
Solution Approach 1:
The patent implements dynamic adjustment of the vertical sync period length based on the number of control cycles. The timing generator dynamically calculates the vertical sync period as (N-1)×Tc + Te, where N is the number of control cycles, Tc is the control cycle period, and Te is the emission period. This dynamic timing adjustment ensures that the light emission cycles remain synchronized with the vertical sync periods even when the display requirements change, thereby maintaining timing synchronization stability while improving system adaptability.
Solution Approach 2:
The patent changes the timing parameters of the vertical sync signal based on the control cycle configuration. By adjusting the vertical sync period length parameter according to the formula (N-1)×Tc + Te, the system maintains proper synchronization between light emission cycles and vertical sync periods. This parameter change approach allows the display system to adapt to different configurations while preserving timing synchronization, resolving the contradiction between adaptability and stability.
2Ease of operation
If multiple control cycles are disposed in a vertical sync period to control brightness levels, then the brightness control capability is improved, but the timing coordination between control cycles and vertical sync periods deteriorates, leading to flicker and brightness variations
Solution Approach 1:
The patent employs periodic control cycles within the vertical sync period to control light emission. Each control cycle has a fixed period Tc, and the vertical sync period is structured to contain an integer number of control cycles plus an emission period. This periodic structure ensures that the light emission cycles are properly coordinated with the vertical sync periods, maintaining timing reliability while enabling brightness control through adjustment of the emission period Te.
Solution Approach 2:
The timing generator uses feedback from the control cycle configuration to adjust the vertical sync period timing. By calculating the vertical sync period as (N-1)×Tc + Te based on the number of control cycles N, the system ensures proper timing coordination. This feedback mechanism maintains reliable timing coordination while preserving brightness control capability, as the emission period Te can be adjusted to control brightness without compromising timing synchronization.
Data Source
AI summary
A semiconductor device comprises circuitry and a timing generator. The circuitry is configured to generate an emission control signal that controls light emission of pixels of a display panel such that a first vertical sync period comprises a plurality of control cycles for the light emission of the pixels. The timing generator is configured to, when a length of the first vertical sync period is changed, start a next vertical sync period following the first vertical sync period at timing based on a length of the control cycles.