Invention Grant
- Patent Title: Display gate driver circuits with dual pulldown transistors
-
Application No.: US14862071Application Date: 2015-09-22
-
Publication No.: US10037738B2Publication Date: 2018-07-31
- Inventor: Rungrot Kitsomboonloha , Chun-Yao Huang , Kyung Wook Kim , Shih Chang Chang , Szu-Hsien Lee
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Treyz Law Group, P.C.
- Agent Jason Tsai
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G09G3/3225 ; G09G3/20

Abstract:
A display is provided that includes an array of display pixels and gate driver circuitry for providing data and gate line signals to the display pixels. Gate driver circuitry may include gate driver circuits that generate the gate line signals. A gate driver circuit may include at least a buffer transistor, a bootstrapping capacitor coupled to the buffer transistor, a pulldown transistor coupled in series with the buffer transistor, and an isolation transistor coupled to the gate of the pulldown transistor. The buffer transistor may directly receive a first clock signal, whereas the isolation transistor may directly receive a second clock signal that is complementary to the first clock signal. The pulldown transistor is substantially larger than the buffer transistor. The buffer transistor is substantially larger than the isolation transistor. Configured as such, clock loading is minimized while the pulldown transistor is sized to provide the desired fall time performance.
Public/Granted literature
- US20170004790A1 Display Gate Driver Circuits with Dual Pulldown Transistors Public/Granted day:2017-01-05
Information query
IPC分类: