Display panel and display device comprising the same

By employing a pixel structure with multiple transistors and capacitors in a self-emitting display device and adjusting the on/off timing of the driving transistors, PWM driving of the light-emitting device was achieved, solving the problem of low grayscale resolution in self-emitting device display devices, improving display performance and reducing power consumption.

CN116363993BActive Publication Date: 2026-06-19LG DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LG DISPLAY CO LTD
Filing Date
2022-09-27
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve fine low grayscale resolution in self-emitting display devices, and the embedding of microintegrated circuits and the large number of transistors result in low process efficiency.

Method used

A multi-pixel structure is adopted, with each pixel including the first to fourth transistors and a capacitor. By adjusting the on/off timing of the driving transistors, PWM driving is performed using the discharge characteristics of the capacitor to control the on-time of the light-emitting device, thereby improving the low grayscale expression performance.

Benefits of technology

By adjusting the turn-on/turn-off timing of the driving transistor and the discharge characteristics of the capacitor, PWM driving of the light-emitting device was realized, which improved the expression performance of low grayscale levels, simplified circuit configuration, and reduced power consumption.

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Abstract

The present disclosure provides a display panel and a display device including the same. The display panel includes a plurality of pixels. Each of the plurality of pixels includes a first transistor including a gate electrode connected to a first node and a first electrode to which a high-level driving voltage is applied, a light emitting device including an anode electrode connected to a second electrode of the first transistor and a cathode electrode to which a low-level driving voltage is applied, a second transistor applying a predetermined fixed voltage to the first node based on a first gate signal, a third transistor applying a data voltage for image expression to a second node based on the first gate signal, a fourth transistor connecting the second node to an input terminal of the low-level driving voltage based on a second gate signal having a phase opposite to that of the first gate signal, and a capacitor connected between the first node and the second node.
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