Acoustic touch position sensor using a low acoustic loss transparent substrate
A touch position, sensor technology, applied in instruments, static indicators, mechanical mode conversion, etc., can solve problems such as difficulty in guaranteeing, the amplitude of the received signal is reduced, and the signal-to-noise ratio is large.
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example 1
[0178] Example 1 (Prior Technology)
[0179] Utilize a flat soda-lime glass substrate (manufactured by Chuo Glass Co., Ltd., 488 mm (width) × 403 mm (length) × 3.3 mm (thickness)) to manufacture such as figure 1 An ultrasonic touchpad is shown. A Rayleigh wave is excited and propagated in this sonic touchpad. The performance of the touch panel was observed using a controller (Model 5810E100 manufactured by Touch Panel Systems, Inc.). Soda lime glass consists of 71% SiO 2 , 13% Na 2 O, 1% K 2 O, 11% CaO, 2% MgO and 2% Al 2 o 3 (% are by weight). The first component (Na 2 The total content of O, CaO, MgO) is 26% by weight, and the second component (Al 2 o 3 , ZrO 2 ,TiO 2 , B 2 o 3 , Y 2 o 3 , SnO 2 , PbO 2 , In 2 o 3 , K 2 The total content of O) is 3% by weight.
[0180]In the visible light region, the glass substrate had a light transmittance of 91.8% (measured with a haze computer HGM-2D manufactured by Suga Inspection Instrument Co., Ltd.). The abs...
example 2
[0187] In this example, a flat borosilicate glass substrate (Schott under the trade name Tempax TM Sold in a size of 488 mm (width) x 403 mm (length) x 3.3 mm (thickness)) instead of the soda-lime glass substrate in Example 1. The glass substrate consists of 81% SiO 2 , 3% Na 2 O, 1% K 2 O, 13% B 2 o 3 , and 2% Al 2 o 3 (% by weight); the first component (Na 2 The total content of O, CaO, MgO) is 3% by weight, the second component (Al 2 o 3 , ZrO 2 ,TiO 2 , B 2 o 3 , Y 2 o 3 , SnO 2 , PbO 2 , In 2 o 3 , K 2 The total content of O) is 16% by weight.
[0188] In the visible light region, the light transmittance of the glass substrate measured by the method described in Example 1 was 93.0%. This is about 1% higher than the soda lime glass in Ratio 1. In addition, when viewed from the edge, the glass has a yellowish-green color instead of the dark green of ordinary soda-lime glass; thus, the light transmission of this glass can be improved.
[0189] Using th...
example 3
[0194] Use a flat glass substrate (Schott or Desag company, trade name B270-SUPERWITE or B270 TM , size is 488 millimeters (width) * 403 millimeters (length) * 3.3 millimeters (thickness)), replaces the soda lime glass substrate that example 1 uses. The glass substrate consists of 69% SiO 2 , 8% Na 2 O, 8% K 2 O, 7% CaO, 2% BaO, 4% ZnO, 1% TiO 2 and 1% Sb 2 o 3 (% are all by weight). The first component (Na 2 The total content of O, CaO, MgO) is 15% by weight, the second component (Al 2 o 3 , ZrO 2 ,TiO 2 , B 2 o 3 , Y 2 o 3 , SnO 2 , PbO 2 , In 2 o 3 , K 2 The total content of O) is 9% by weight.
[0195] Using the same method as described in Example 1, it was measured that the light transmittance of the glass substrate was 92.8% in the visible light region. This measurement is 1% higher than the ratio 1 soda lime glass. When viewed from the edge, the same yellowish green color as the borosilicate glass of Example 2 is visible, rather than the dark green...
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