MATRIX TYPE LIGHT-EMITTING APPARATUS

PURPOSE: A matrix type light emitting apparatus is provided to control the size of Zener voltage of a bidirectional Zener diode according to the size of applied voltage, thereby protecting the matrix type light emitting apparatus. CONSTITUTION: First selection lines are arranged in a first direction...

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Bibliographic Details
Main Authors SHIN, SUN WOONG, CHOI, JAE YOUNG
Format Patent
LanguageEnglish
Korean
Published 09.04.2012
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
PHYSICS
SEALS
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Summary:PURPOSE: A matrix type light emitting apparatus is provided to control the size of Zener voltage of a bidirectional Zener diode according to the size of applied voltage, thereby protecting the matrix type light emitting apparatus. CONSTITUTION: First selection lines are arranged in a first direction. Second selection lines are arranged in a second direction crossing with the first direction. A plurality of light emitting diodes(L1-L9) emits light by combining the first selection lines and the second selection lines. A plurality of bidirectional Zener diodes(ZD1-ZD9) is respectively connected to a single light emitting diode among the plurality of light emitting diode in parallel. The bidirectional Zener diode has Zener voltage in which a sum of the size of the Zener voltage and twice the size of forward voltage of the single light emitting diode exceeds the voltage applied between the first and second selection lines.
Bibliography:Application Number: KR20100095155