Invention Application
- Patent Title: LED display apparatus
- Patent Title (中): LED显示装置
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Application No.: US11979042Application Date: 2007-10-30
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Publication No.: US20080252574A1Publication Date: 2008-10-16
- Inventor: Hiroyuki Sakai , Takehiro Koyama , Hideki Muramatsu , Toshiaki Kobayashi
- Applicant: Hiroyuki Sakai , Takehiro Koyama , Hideki Muramatsu , Toshiaki Kobayashi
- Assignee: Nagano Keiki Co., Ltd.
- Current Assignee: Nagano Keiki Co., Ltd.
- Priority: JP2007-106977 20070416
- Main IPC: G09G3/32
- IPC: G09G3/32

Abstract:
An LED display apparatus 1 in which at least multiple LEDs are serially-connected to a power circuit part having a constant current power source, each one of the LEDs has a switching element parallel-connected thereto, and a control circuit part is used to selectively turn on/off the switching elements to control the LEDs for a specific display, characterized by the fact that the apparatus comprises a display matrix circuit part 9 constituted by parallel-connecting to the power circuit part 8 multiple LED circuits 7a, 7b, 7c . . . consisting of multiple LEDs 2 . . . and a single first switching element 3a, 3b, 3c . . . serially-connected and second switching element 4 . . . each parallel-connected to one of the LEDs 2 . . . , and a control circuit part 10 turning on the first switching elements 3a . . . for a given time period (Ts) in sequence and turning on/off a row La, Lb, Lc . . . of multiple second switching elements 4 . . . extending across the LED circuits 7a . . . of the display matrix circuit part 9 in correspondence with the first switch 3a . . . being turned on.
Public/Granted literature
- US08044898B2 LED display apparatus having a column and row controller Public/Granted day:2011-10-25
Information query
IPC分类: