Writing apparatus and light-emitting diode display panel and writing pen thereof

An light-emitting diode display panel includes a plurality of pixel units, a drive circuit and a control circuit. Each pixel unit includes a first color light source, a touching element, a first light detector and a first filter. When an external light source emitting a first color light moves on th...

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Bibliographic Details
Main Author CHEN, POOU
Format Patent
LanguageChinese
English
Published 01.07.2014
Subjects
ADVERTISING
CALCULATING
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
DISPLAYING
EDUCATION
ELECTRIC DIGITAL DATA PROCESSING
LABELS OR NAME-PLATES
PHYSICS
SEALS
SIGNS
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Summary:An light-emitting diode display panel includes a plurality of pixel units, a drive circuit and a control circuit. Each pixel unit includes a first color light source, a touching element, a first light detector and a first filter. When an external light source emitting a first color light moves on the light-emitting diode display panel, the first filter of the irradiated pixel allows the first color light to transmit to activate the first light detector. The first light detector transports selecting signal to the control circuit. When the touching element is touched at the same time, the touching element transports touching signal to the control circuit. The control circuit lights up the first color light source. Thereby the light-emitting diode display panel shows a track corresponding to the movement of the external light source.
Bibliography:Application Number: TW20121149897