Display Module Row Timing for Stable Data Signal Output
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Solution Overview
Problem
The limitation of voltage output capability in data signal output units during transitions from black to white lines in display modules leads to abnormal display signals, causing display abnormalities.
Innovation Solution
The data signal output unit is controlled to be in an OFF state during the data writing period and switched to an ON state within a reserved period, ensuring sufficient time for stable signal output to the next row of sub-pixels, utilizing a reserved period that includes a light-emitting and idle period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the data signal output unit is switched from OFF to ON immediately when scanning transitions from black to white sub-pixels, then the response speed is improved, but the voltage output capability becomes abnormal causing display defects
Solution Approach 1:
The patent applies preliminary action by switching the data signal output unit from OFF to ON state during the reserved period before the actual data writing to white sub-pixels begins. This advance switching allows the output unit to stabilize its voltage output capability before delivering data signals, preventing voltage abnormalities while maintaining fast response. The reserved period serves as a preparation phase where the output unit activates without immediately bearing the full data writing load.
2Use of energy by moving object
If the data signal output unit remains in OFF state to save power, then energy consumption is reduced, but the data signal voltage becomes abnormal when switching is required
Solution Approach 1:
The patent uses preliminary action by activating the data signal output unit during the reserved period before data writing to white sub-pixels. This timing strategy allows the unit to switch from power-saving OFF state to operational ON state in advance, ensuring voltage stability is achieved before data writing begins, thus balancing power consumption with signal reliability.
Solution Approach 2:
The patent implements periodic action by controlling the data signal output unit to switch between OFF and ON states based on the scanning content of different sub-pixel rows. When black sub-pixels are scanned, the unit remains OFF to save power; when white sub-pixels are scanned, the unit switches to ON during the reserved period. This periodic switching pattern optimizes power consumption while ensuring reliable voltage output during required periods.
3Reliability
If the data writing period is extended to ensure stable signal output, then the display quality is improved, but the scanning speed decreases
Solution Approach 1:
The patent applies preliminary action by performing the voltage stabilization process during the reserved period before the actual data writing begins. This separates the preparation phase (switching and stabilizing voltage) from the execution phase (data writing to sub-pixels). The data writing period itself remains short and efficient, while the reserved period handles the stabilization tasks, thus maintaining high scanning speed without compromising signal quality.
Data Source
AI summary
A display module, a display device, and a control method for the display module. The display module comprises a driving module (1) and a display panel (2). The driving module (1) comprises a data signal output unit (11). The display panel (2) comprises N rows of sub-pixels. A scanning stage of each row of sub-pixels comprises a data writing period and a reserved period immediately following the data writing period; and the data signal output unit (11) is configured to be in an off state in the data writing period of the n-th row of sub-pixels (610), and switch from the off state to an on state in the reserved period of the n-th row of sub-pixels, so as to provide a stable first data signal for the (n+1)-th row of sub-pixels in the data writing period of the (n+1)-th row of sub-pixels, wherein 0<n<N (620).