TCL Technology Group has been granted a patent for a display panel that includes a display GOA unit and a dummy GOA unit. The display GOA unit receives a frame start signal, while the dummy GOA unit receives a control signal. The frame start signal consists of one frame start pulse, and the control signal consists of a first pulse and a second pulse generated sequentially at intervals. The patent aims to improve the performance of display panels. GlobalData’s report on TCL Technology Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on TCL Technology Group, H2 storage carbon nanotubes was a key innovation area identified from patents. TCL Technology Group's grant share as of September 2023 was 30%. Grant share is based on the ratio of number of grants to total number of patents.

The patent is granted for a display panel with synchronized pulses

Source: United States Patent and Trademark Office (USPTO). Credit: TCL Technology Group Corp

A recently granted patent (Publication Number: US11776446B1) describes a display panel that includes a display Gate-On-Array (GOA) unit and a dummy GOA unit. The dummy GOA unit is connected to the display GOA unit and serves as a control mechanism.

The display GOA unit comprises a pull-down module that receives a frame start signal. The dummy GOA unit also includes a pull-down module, but it receives a control signal. Within a frame duration, the frame start signal consists of one frame start pulse, while the control signal includes a first pulse and a second pulse generated sequentially at intervals. The first pulse of the current frame is generated between the last clock pulse of the current frame received by the display GOA unit and the frame start pulse of the next frame. The second pulse of the current frame is generated between the last clock pulse of the current frame received by the display GOA unit and either the frame start pulse of the next frame or in synchronization with it.

The dummy GOA unit's pull-down module is responsible for pulling down the potentials of a first node and a first output terminal of the dummy GOA unit under the control of the control signal. Additionally, the dummy GOA unit includes a pull-up control module, a pull-up module, a pull-down holding module, and a pre-charging module. These components work together to maintain the potentials of the first node and the first output terminal at the potential of a low-level signal.

The display panel's driving timing includes a reset period, a pull-up output period, a pull-down period, and a pull-down holding period. These periods are controlled by various signals and modules within the dummy GOA unit. The driving timing also includes a pulse interval period between the pull-up output period and the pull-down period.

The patent also specifies time intervals between pulses and signals within the same frame. For example, the time interval between the first pulse and the last clock pulse received by the display GOA unit must be greater than zero seconds and less than or equal to 2/(P×N) microseconds, where P is the refresh frequency of the display panel and N is the number of stages of the display GOA unit.

Overall, this patent describes a display panel design that incorporates a dummy GOA unit to control various signals and timing within the panel. The design aims to improve the performance and functionality of the display panel.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.