Other

Hoseo University Academic Cooperation Foundation

Byung-Seong Bae

Don-Sam Choi

Seo-Jin Kang

Tae-Bo Jung

Hyuck-Su Lee

The present invention relates to a scan drive circuit and, more specifically, to a scan drive circuit that is insensitive to changes in the characteristics of transistors, enabling stable operation even when such changes occur within a certain range. Accordingly, the scan drive circuit provides the advantage of high yield when applied not only to conventional rigid substrates but also to flexible or stretchable substrates. According to the present invention, a scan drive circuit is provided that operates normally regardless of whether the transistor exhibits enhancement-type or depletion-type characteristics, thereby eliminating the need to modify the circuit or employ complex designs based on the characteristics of the transistors.

Scan drive circuit insensitive to variations in transistor characteristics

The present invention provides a gamma setting system for a display device including: an optical measuring unit measuring an optical property of a display device including an emissive display panel having red, green and blue sub-pixels; a control center performing a null setting step and an automatic setting step using the optical property of the display device; a system driving unit transmitting a result data between the display device and the control center; a first display unit displaying a TW target luminance, a TW target chromaticity and an RGB inherent chromaticity registered for the null setting step and the automatic setting step, a graph of a gray level voltage and a luminance of an RGB and a TW with respect to a gray level, a high level cell driving voltage (PVDD) and a low level cell driving voltage (PVEE) applied to an emitting element, a high level gamma source voltage (VDDH) and a low level gamma source voltage (VDDL) applied to a driving IC, a gamma slope, a contrast ratio, a driving type of the system, a gamma setting, an instruction on an execution command, and a progress state of the display device.

Growing community of inventors

Suwon-si, South Korea

Byung-Seong Bae