Novatek Microelectronics has been granted a patent for a pixel circuit in a display panel. The circuit includes multiple switches, a capacitor, and a diode, allowing for independent power rail emission current without being affected by initial voltages. GlobalData’s report on Novatek Microelectronics 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 Novatek Microelectronics, Adaptive video coding was a key innovation area identified from patents. Novatek Microelectronics's grant share as of September 2023 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
Pixel circuit for display panel with independent power rail emission current
A recently granted patent (Publication Number: US11776477B1) describes a pixel circuit for a display panel. The pixel circuit includes several components and switches that work together to drive the emission current and control the operation of the pixel.
The pixel circuit includes a first switch, a second switch, and a third switch. The first switch is connected to a positive supplied power voltage (PVDD) and the second switch is connected to both the first switch and a data line. The third switch acts as a driving transistor for the pixel circuit and is connected to a common terminal of the first and second switches.
The pixel circuit also includes a first capacitor, a fourth switch, a fifth switch, and a diode. The first capacitor is connected to the common terminal of the first, second, and third switches. The fourth switch is connected to the second end of the first capacitor and the third switch. The fifth switch is connected to a first initial voltage (Vinitn) and the second end of the first capacitor. The diode has an anode connected to the common terminal of the third and fourth switches and a cathode connected to a negative emission source voltage (ELVSS).
The patent also describes the specific types of switches used in the pixel circuit, which are P-type MOSFETs. The switches are controlled by various control signals to perform different functions within the circuit.
The pixel circuit can be used with different types of light-emitting diodes, such as Micro Light-Emitting Diodes (µLEDs) or Organic Light-Emitting Diodes (OLEDs).
Additionally, the pixel circuit can include a sixth switch and a second capacitor. The sixth switch is connected between the drain of the third switch, the drain of the fourth switch, and the anode of the diode. The second capacitor is connected to a reference voltage and the second end of the first capacitor, as well as the gate of the third switch, the source of the fourth switch, and the source of the fifth switch.
Overall, this patent describes a pixel circuit for a display panel that utilizes various switches and components to control the emission current and operation of the pixel. The circuit can be used with different types of light-emitting diodes and includes additional features such as a second capacitor and a sixth switch.
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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.
