Drive Circuit for LCD Panel Startup Stability
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Solution Overview
Problem
Liquid Crystal Display (LCD) panels often experience abnormal startup screens due to the unstable state of the Timing Controller Integrated Circuit (TCON IC) during initial configuration, leading to prolonged startup times and user dissatisfaction.
Innovation Solution
A drive circuit comprising a timing control chip, control circuit, and gate drive circuit that detects the completion of initial configuration and outputs state signals to control the display of the LCD panel, allowing the backlight module to be turned on simultaneously with initial configurations, ensuring stable picture display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the backlight module is turned on before the TCON IC completes initial configuration, then the startup time is reduced, but abnormal startup screens occur due to unstable TCON IC output
Solution Approach 1:
The backlight module is activated in advance during the initial configuration period, performing the lighting preparation action before the TCON IC completes its configuration. This preliminary action reduces the overall startup time by eliminating the sequential delay, while the control circuit ensures abnormal screens are prevented through conditional signal gating.
Solution Approach 2:
A control circuit is introduced as an intermediary component between the TCON IC and the gate drive circuit. This intermediary monitors the configuration completion status and conditionally enables the picture display signal, thereby mediating between the unstable TCON IC output and the display system to prevent abnormal screens while allowing early backlight activation.
2Reliability
If the backlight module is pushed back to turn on after TCON IC stabilization, then abnormal startup screens are prevented, but the startup time is prolonged
Solution Approach 1:
The backlight module performs its activation action in advance during the initial configuration phase, rather than waiting for TCON IC stabilization. This preliminary action eliminates the sequential delay between configuration completion and backlight activation, reducing total startup time while maintaining display stability through control circuit mediation.
Solution Approach 2:
The backlight module maintains continuous operation throughout the entire initial configuration period and into normal operation. This continuous useful action eliminates the interruption and delay caused by sequential activation, allowing the display system to transition smoothly from startup to normal operation without blank periods or repeated activation cycles.
3Reliability
If the TCON IC completes initial configuration before backlight activation, then stable picture display is ensured, but user waiting time increases
Solution Approach 1:
The backlight module executes its activation action preliminarily during the configuration phase rather than sequentially after completion. This preliminary action overlaps the backlight warm-up time with the configuration time, effectively hiding the delay from the user's perspective and improving perceived startup efficiency while maintaining picture stability.
Solution Approach 2:
The control circuit implements feedback by monitoring the configuration completion status signal and conditionally enabling the picture display output. This feedback mechanism ensures that stable picture display is only enabled when the TCON IC is ready, preventing abnormal screens while allowing the backlight to be active earlier, thus improving startup efficiency without sacrificing reliability.
Data Source
AI summary
The present application discloses a drive circuit, a display module driving method and a display module. The drive circuit includes: a timing control chip, configured to output a state signal; a control circuit, configured to receive the state signal and output a ready signal; and a gate drive circuit, configured to control, according to the ready signal, whether a display screen displays a picture or not.