Single Scanner Merging Sampling and Switching Transistors in OLED Displays

The patent combines the scanning functions for both the sampling transistor and switching transistor into a single scanner. The scanner sequentially supplies control signals to scan lines WS1, WS2, WS3, and WS4, which control the sampling transistors T1 and switching transistors T3 respectively. This merging eliminates the need for separate scanners while maintaining the ability to independently control both transistor types, thereby reducing device complexity while preserving luminance uniformity.

The single scanner performs multiple functions by sequentially controlling different scan lines. It first supplies control signals to scan line WS1 for sampling transistors T1, then to scan line WS2 for switching transistors T3, and subsequently to WS3 and WS4 for the next row of transistors. This multi-functional approach allows one scanner to replace what would traditionally require multiple dedicated scanners, reducing overall system complexity.

The patent merges multiple scanner functions into a single scanner that sequentially controls scan lines WS1 through WS4. This reduction from multiple scanners to one decreases the bill of materials cost, assembly complexity, and manufacturing overhead while maintaining uniform light emission through proper timing control of the sampling and switching transistors in each pixel.

The single scanner is designed with multi-functionality to control both sampling and switching transistors across all rows. By making the scanner universal rather than having dedicated scanners for each transistor type, the manufacturing cost is reduced while the ability to maintain uniform luminance through independent control of each transistor type is preserved.