Light Source Module Current Control Reduces Interconnect Cables
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Solution Overview
Problem
As liquid crystal display devices increase in size, the number of light source blocks and electrical connections required for current control increases, leading to higher costs and reliability issues due to increased connection cables and disconnectable pins, which can result in contact defects.
Innovation Solution
A light source module with a driving substrate, multiple light source blocks, and a current control element with channel terminals for individual current control, along with a light source control unit that includes a voltage transforming circuit and control logic substrate, reduces the number of connection cables and pins needed by integrating current control directly on the driving substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of light source blocks increases to meet larger display device requirements, then the light output capability is improved, but the number of connection cables and pins increases leading to higher costs and reduced reliability
Solution Approach 1:
The patent merges the current control functionality directly into the driving substrate by integrating current control elements (such as resistors or circuitry) onto the same substrate that drives the light source blocks. This consolidation eliminates the need for separate connection cables and pins for current control, thereby reducing the total number of electrical connections while maintaining the ability to individually control multiple light source blocks. The merging of control and driving functions on a single substrate directly addresses the reliability issue by reducing potential contact defect points.
Solution Approach 2:
The driving substrate acts as an intermediary component that combines both the control signals and current regulation functions. Instead of requiring separate cables for control signals and current delivery, the driving substrate mediates between the power source and light source blocks, integrating multiple functions into a single interface. This intermediary approach reduces the number of disconnectable pins while maintaining individual control capability over multiple light source blocks.
2Adaptability or versatility
If the number of connection cables and pins increases to control more light source blocks, then the current control capability is improved, but the cost and device complexity increase
Solution Approach 1:
The patent combines multiple functions (driving signals delivery and current control) into a single driving substrate, eliminating the need for separate connection cables for each function. This merging reduces device complexity while preserving the adaptability to control multiple light source blocks individually through the integrated current control elements on the substrate.
Solution Approach 2:
The driving substrate is designed to perform multiple functions simultaneously: it delivers driving signals to light source blocks and provides current control through integrated elements. This multi-functional design allows a single component to replace what would traditionally require multiple separate cables and connectors, thereby reducing overall device complexity while maintaining versatile control capability.
3Manufacturing precision
If the number of disconnectable pins increases to individually control more light source blocks, then the current control precision is improved, but the risk of contact defects increases
Solution Approach 1:
The patent integrates current control elements directly onto the driving substrate, merging the precision control function with the driving interface. This integration eliminates multiple disconnectable pins while maintaining individual current control precision for each light source block through the substrate's integrated circuitry or resistor network, thereby preserving manufacturing precision while improving reliability.
Solution Approach 2:
The driving substrate serves as an intermediary that provides precise current control through integrated elements rather than through multiple disconnectable pins. This intermediary approach maintains the precision needed for individual light source block control while eliminating the reliability issues associated with numerous electrical contacts and potential connection defects.
Data Source
AI summary
A light source module includes a driving substrate, a plurality of light source blocks and a currents control element. The light source blocks are disposed on the driving substrate, and each of the light source blocks includes at least one light source. The currents control element is disposed on the driving substrate, and has channel terminals for individually controlling driving currents passed through at least two light source blocks. The channel terminals are electrically connected to the at least two light source blocks, respectively. The currents control element is disposed on the driving substrate and individually controls the driving currents applied to the light source blocks, so that a number of wires of a connection cable connected to a light source driving connector is less than the number of light source drive currents being individually controlled.