AUO has been granted a patent for a display device that includes pixel driving circuits coupled in series. The device features a light emitting unit, capacitors, and switches that adjust voltage levels to control the emission of light. The patent aims to improve the performance and functionality of display devices. GlobalData’s report on AUO gives a 360-degree view of the company including its patenting strategy. Buy the report here.
Smarter leaders trust GlobalData
According to GlobalData’s company profile on AUO, under-screen fingerprint recognition was a key innovation area identified from patents. AUO's grant share as of September 2023 was 77%. Grant share is based on the ratio of number of grants to total number of patents.
Display device with series-coupled pixel driving circuits and capacitors
A recently granted patent (Publication Number: US11776463B2) describes a display device with pixel driving circuits that are connected in series. Each pixel driving circuit includes a light emitting unit, capacitors, and switches. The first switch adjusts the voltage level of the first node based on a scan signal received by its control terminal. The control terminal of the first switch is different from its first terminal. The display device also includes additional switches that are turned on and off in a specific sequence.
The display device further includes a third switch that is turned on when the second switch is turned on, and turned off when the second switch is turned off. Additionally, a fourth switch is turned on when both the second and third switches are turned off. The second terminal of the second switch and the third switch are configured to receive a reference signal. Another switch, the fourth switch, provides the reference signal to the second node when the second and third switches are turned off.
The patent also describes a detecting method that involves writing a reference signal into the control terminal of the first switch at the first node. A data signal is then written into the first node through a first capacitor. A first current is generated and measured, and the first switch is determined to be normal based on the current level corresponding to the data signal. The method includes determining the abnormality of the first switch if the current level does not correspond to the data signal. It also involves determining the normality of a second switch based on the current level corresponding to the data signal.
In addition, the detecting method includes coupling a light emitting element to an accommodating space positioned between a second node and a third node after measuring the first current. The second switch and a third switch are turned on simultaneously to generate a second current, which is received by the light emitting element. The brightness of the light emitting element corresponding to the data signal determines the normality of the third switch. The method also involves generating a third current by a third switch and determining the normality of the third switch based on the brightness of the light emitting element corresponding to a voltage level of a voltage signal.
Lastly, the patent describes a pixel driving circuit that includes multiple switches and a light emitting element. The first switch generates a current based on the voltage level of the first node, and its control terminal is coupled to the first node. The second switch is connected to the first switch at a second node, and the third switch is connected to the second node. The fourth switch is connected to the first switch at a third node. The pixel driving circuit also includes a data writing unit that adjusts the voltage level of the first node based on a scan signal received by the control terminal of the first switch. The control terminal of the first switch is different from its first terminal.
To know more about GlobalData’s detailed insights on AUO, buy the report here.
Data Insights
From
The gold standard of business intelligence.
Blending expert knowledge with cutting-edge technology, GlobalData’s unrivalled proprietary data will enable you to decode what’s happening in your market. You can make better informed decisions and gain a future-proof advantage over your competitors.
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.
