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Touch Sensitive Organic Light Emitting Diode

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Available Post Auction Inventory
ID AUC 015
Seller Lee Young Jong
Sector Display Systems
Assets 1 - Foreign Patent; 1 - Foreign Application
Other Patents KR 100743545
Applications PCT/KR07/003066

Lot Summary

This patent portfolio discloses a touch sensing Organic Light Emitting Diode (OLED). Generally, a touch screen display device includes a touch sensor film covering a display substrate implemented by an LCD or OLED. Therefore, when a touch by a user’s finger is sensed, a corresponding signal is transmitted to a touch screen signal processing unit for calculating the coordinate values of the finger. However, such a sensor film is costly. Further, a touch sensing function and a touch screen signal processing unit must be separately installed on the display substrate, resulting in increased manufacturing costs for such devices.

Value Proposition: This portfolio discloses techniques for providing a touch sensing function to Organic Light Emitting Diodes. An OLED pixel structure is similar to that of a capacitor. Therefore, a driver circuit and a touch detector (which can be implemented by comparator) can be combined in an OLED pixel to make it touch sensitive. Therefore, touch on an OLED display can be detected without a sensing material film resulting in a significant cost advantage and high sensing resolution that can be used for various applications such as fingerprint recognition. The driver circuit generates power to charge a comparison voltage capacitor and a reference voltage capacitor. The touch on an OLED pixel is then detected by comparing the comparison voltage capacitor with the reference voltage capacitor.

Due Diligence

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