Master-Slave Display Drive Circuit Control Signal Distribution
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Solution Overview
Problem
Conventional liquid crystal display devices with slave mode image-signal-line drive circuits have limited functionality and do not operate effectively, restricting their ability to receive and display multiple input signals.
Innovation Solution
A display device configuration that includes a master/slave selection circuit allowing any image-signal-line drive circuit to operate as a master based on an external selection signal, enabling the generation and distribution of control signals to other circuits, thereby enabling the reception and display of diverse input signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a timing controller is incorporated into each image-signal-line drive circuit, then power consumption is reduced by suspending the timing controller in slave mode, but the functionality of slave mode circuits is limited and they do not work effectively
Solution Approach 1:
The patent makes the slave mode image-signal-line drive circuit capable of performing multiple functions by enabling it to receive different input signals (such as USB signals) in addition to its original function. The slave mode circuit can operate as a secondary display controller when the master mode circuit is abnormal or when dual display is required, thus achieving multi-functionality while maintaining low power consumption through selective suspension of the timing controller.
2Use of energy by moving object
If the slave mode image-signal-line drive circuit has suspended functions, then power consumption is reduced, but the ability to receive and display multiple input signals is restricted
Solution Approach 1:
The patent implements a dynamic configuration where the slave mode image-signal-line drive circuit can switch between suspended and active states based on operational requirements. The master/slave selection circuit dynamically assigns roles between drive circuits, and the slave mode circuit can be activated to receive alternative input signals when needed, providing adaptability while maintaining power efficiency through selective activation.
3Ease of manufacture
If one timing controller is used in master mode and suspended in slave mode, then cost is reduced, but reliability is reduced due to lack of backup capability
Solution Approach 1:
The patent prepares backup capability in advance by maintaining the slave mode image-signal-line drive circuit with its timing controller in a standby state. Although the timing controller is suspended during normal operation to reduce power consumption and cost, it remains capable of rapid activation when the master mode circuit fails. This beforehand preparation ensures reliability without requiring an additional active timing controller, thus maintaining cost-effectiveness.
4Use of energy by moving object
If the slave mode timing controller is suspended, then power consumption is reduced, but the circuit cannot effectively work when master mode fails
Solution Approach 1:
The patent enables the slave mode image-signal-line drive circuit to serve itself as a backup by maintaining its timing controller in a suspended but functional state. When the master mode circuit fails, the slave mode circuit can self-activate and take over the display control functions without requiring external intervention or additional hardware, thus ensuring reliability while maintaining power efficiency during normal operation.
Data Source
AI summary
Each of image-signal-line drive circuits includes a timing controller that generates a control signal controlling itself and other image-signal-line drive circuit, and a master/slave selection circuit that sets itself as a master mode image-signal-line drive circuit or a slave mode image-signal-line drive circuit based on a selection signal to be given from outside. From among the plurality of image-signal-line drive circuits, the master mode image-signal-line drive circuit gives the control signal to the slave mode image-signal-line drive circuit.