Matrix LED Lighting Apparatus Hybrid Driving Method
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Solution Overview
Problem
Conventional lightening apparatuses with LED elements arranged in a matrix face challenges in size reduction and luminous intensity when using dynamic driving methods, as they require fewer voltage lines but result in decreased luminous periods and intensity with increased rows, and static methods require more voltage lines, increasing size.
Innovation Solution
The apparatus employs a hybrid driving method with multiple reference and drive voltage lines, where at least two reference voltage lines and 'n' drive voltage lines are used, with a dynamic driving method for one set and either dynamic or static for another, allowing for time-divisional switching to maintain luminous intensity across multiple rows without increasing voltage lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the dynamic driving method is used with increased rows of LED elements, then the number of voltage lines is reduced, but the luminous period and luminous intensity decrease
Solution Approach 1:
The patent segments the LED matrix into multiple independently controllable groups (first matrix with m1 rows, second matrix with m2 rows, etc.). Each group has its own reference voltage lines and drive voltage lines, allowing parallel operation. This segmentation enables the system to maintain short luminous periods for each group while still covering a large total number of rows, thus preserving both low line complexity and high luminous intensity.
Solution Approach 2:
The patent introduces a new dimensional approach by organizing LED elements into multiple independent matrices rather than a single large matrix. This dimensional reorganization allows the system to achieve the equivalent of driving many more rows without proportionally increasing the number of voltage lines, as each matrix operates independently with its own simplified addressing scheme.
2Illumination intensity
If the static driving method is used, then the luminous intensity is maintained, but the number of voltage lines increases
Solution Approach 1:
The patent divides the LED array into multiple independent matrices, each driven by its own reference voltage lines and drive voltage lines. This segmentation allows the system to use static driving within each small matrix (maintaining full luminous intensity) while avoiding the need for a large number of voltage lines that would be required if static driving were applied to the entire large matrix.
Solution Approach 2:
The patent combines multiple independently driven matrices to create a large-scale LED lighting system. By merging several small matrices (each with manageable voltage line requirements) into a unified system, the patent achieves both low voltage line complexity and high luminous intensity simultaneously.
3Area of stationary object
If the number of rows of LED elements is increased in a single matrix, then the coverage area is expanded, but the luminous period decreases when using dynamic driving
Solution Approach 1:
The patent segments a large number of rows into multiple smaller matrices (first matrix with m1 rows, second matrix with m2 rows, etc.). Each matrix can be driven with a sufficiently long luminous period while the combined coverage area equals that of a single large matrix. This segmentation allows the system to expand coverage area without sacrificing luminous period.
Solution Approach 2:
The patent ensures continuous useful action by operating multiple matrices in parallel, where each matrix contributes to the overall illumination. This parallel operation maintains continuous light output across the entire coverage area, preventing any reduction in effective luminous period that would occur if a single large matrix were driven sequentially.
Data Source
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AI summary
A lightening apparatus includes light-emitting elements (P1,1, P1,2, ···) arranged in a matrix. One of the light-emitting elements (P2,1,P2,2, ···) is located at each intersection between at least two first reference voltage lines (S2, S5) and "m" first drive voltage lines (Y1, Y2, ···). A first reference voltage driver (3) time-divisionally switches the first reference voltage lines (S2, S5). A first drive voltage driver (6) supplies first luminous drive voltages (B1, B2, ···; E1, E2, ···) to the first drive voltage lines (Y1, Y2, ···). One of the light-emitting elements (P1,1,P1,2,···, P3,1,P3,2,···; P4,1,P4,2, ···) is located at each intersection between at least one second reference voltage line (S1, S3; S4) and "m" second drive voltage lines (X1, X2, ···; Z1, Z2, ···). A second reference voltage driver (2, 4) switches the second reference voltage line (S1, S3; S4). A second drive voltage driver (5, 7) supplies second luminous drive voltages (A1, A2, ···, C1, C2, ···; D1, D2, ···) to the second drive voltage lines (X1, X2, ···; Z1, Z2, ···).