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On September 26, it was reported by the Korean Current Affairs Journal of Star LG Display that Samsung Display and LG Display are developing an open OLED panel that can sound through the screen itself, and are currently preparing to introduce it into foldable smart phones. Hair screen
It is said that the two companies and the Korean Equipment Company have jointly developed a folded piezoelectric device called "Piezo", which can emit sound through the display without speakers. Overlapping screen
At present, the Star LG Display Samsung Galaxy Z Flip series folding screen mobile phone can conduct voice calls when folded, but when answering a call in the folded state, it will automatically switch to the speaker for sound (the receiver is located at the top of the front panel and the microphone is located at the bottom of the mobile phone. When the mobile phone is folded, the two are very close, so normal calls cannot be made). If the sound comes from the display itself, this limitation can be eliminated.
Korea Electronic Technology Institute (KETI) Li Zhengnan, a senior researcher, said: "Even if piezoelectric method is not used, it is possible to ensure the distance between the microphone and the speaker in the folded state (make a call in the folded state), but if the sound can be emitted from the display itself, there is no need to ensure a separate space for the speaker, so there is more freedom in design."
It is worth mentioning that this OLED panel using piezoelectric technology has previously been used by LG Electronics and some Chinese manufacturers in smart TV. LG Display calls it "Crystal Sound OLED". The principle is to use the display panel itself as the diaphragm of the speaker for sound generation.
However, compared with traditional loudspeakers, this kind of piezoelectric element has a higher cost, so it is expected that it will only be used in high-end products. It is reported that Samsung Display and LG Display are considering this technology as one of the ways to develop high value-added OLED products to distinguish them from Chinese companies.
An insider in the electronics industry said, "With the declining price of OLED panels, manufacturers such as Samsung Display and LG Display are considering OLED sound generation solutions as one way to increase added value. However, if additional piezoelectric components are added instead of ordinary loudspeaker amplifiers, the price of the panel will increase. Therefore, we are working with piezoelectric component manufacturers to optimize how to manufacture parts cheaply and supply them in the form required by customers. "
