Loudspeaker system and application thereof
A technology of speakers and piezoelectric speakers, applied in the direction of speaker screens, sensors, sensor types, etc., can solve the problems of video or image screen jitter, OLED application, etc., and achieve the effects of small distortion, reduced deviation, and small size
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Embodiment 1
[0089] refer to Figure 17 ~ Figure 24 , an example of a flat panel speaker for a TV using an OLED based on the optimization conditions of the above-mentioned cutoff frequency will be described. In the following description, the direction in which the OLED panel speaker produces sound is referred to as the front side of the OLED panel speaker 1, and the opposite side is referred to as the rear side;
[0090] Figure 17 (a) and (b) are the forms of the piezoelectric element pasted on the back side of the OLED. A piezoelectric material of lead zirconate titanate is used for the piezoelectric element used here. After the green body is made, 10~20 sheets of 30μm are stacked and then pressed and fired. The sintering temperature is 1050°C. The external electrodes 2, 5 are printed on the upper and lower surfaces of the fired piezoelectric element 1, respectively, and fired. At the same time, other external electrodes 3 which are not electrically connected to the external electro...
Embodiment 2
[0097] refer to Figure 25 ~ Figure 28 The second embodiment related to the present invention will be described. Using the piezoelectric element 1 and the element 11 used in the first embodiment, an OLED of 1770 mm x 996 mm x 0.7 mm was used as a panel. Compared with the first embodiment, the size of the OLED becomes larger, so as Figure 25 The number of components is increased and pasted as shown. A total of 4 components are pasted in the pasting position in the long-side direction and the short-side direction respectively in 3 equal positions. Figure 26 is the frequency characteristic at this time. Compared with the first embodiment, the area of the OLED is increased, and the exclusion volume of air is increased, so that the overall sound pressure is increased. In addition, the reproduction frequency band also drops to around 300 Hz. Input a video signal with a music signal to this OLED, and check that the screen shakes after playback. Therefore, as in the first em...
Embodiment 3
[0102] This example provides a flat piezoelectric speaker vibrator suitable for the above speaker system, as attached Figure 34 As shown, there are 9 layers of single piezoelectric ceramic sheets, and the fifth layer is the internal isolation layer. The polarization direction of the single piezoelectric ceramic sheet above the internal isolation layer is opposite to the direction of the electric field applied during use, resulting in shortening displacement , the polarization direction of a single piezoelectric ceramic sheet below the internal isolation layer is the same as the direction of the electric field applied during use, resulting in telescopic displacement, and the overall displacement increases;
[0103] as attached Figure 35 , 36 As shown, the piezoelectric ceramic sheet in the flat piezoelectric speaker vibrator is rectangular, and the aspect ratio is 3:1-10:1. The flat piezoelectric speaker vibrator includes a flat piezoelectric speaker vibrator for medium and h...
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