Please select the most similar patent number from A, B, C and D. Which number is?
A pressure sensing device according to an embodiment of the present disclosure comprises: a sensor, comprising: a sheet-shaped piezoresistive material layer, and a first electrode structure and a second electrode structure which are arranged oppositely on both sides of the piezoresistive material layer. A surface, facing the piezoresistive material layer, of the first electrode structure and/or the second electrode structure is provided with two or more protrusions, so as to form an uneven surface.
A: A pressure sensor and preparation method therefor. The pressure sensor comprises two external connection electrodes (30) and two oppositely provided elastic substrates (10); a contact surface of at least one substrate (10) is provided with protrusion structures (11); the contact surfaces are the surfaces of the two substrates (10) that are opposite to each other; the substrates (10) are conductors; each substrate (10) is connected to an external connection electrode (30); the surfaces of the protrusion structures (11) are covered with conductive layers (20). The pressure sensor not only uses the piezoresistive effect that the resistance changes due to that the elastic conductive substrates (10) deform under the action of pressure, but also uses the effect that the contact resistance changes due to that the contact areas of the conductive layers (20) on the surfaces of the protrusion structures (11) of the substrates (10) change under the action of pressure, thereby greatly widening the pressure measurement range by means of the synergetic action of the two effects and further improving the sensitivity and the reliability of the pressure sensor.
B: A pressure touch sensor (100), a display device and a driving method therefor. The pressure touch sensor (100) comprises: a driving electrode (110) and a sensing electrode (120), and a piezoelectric material layer (130) and a piezoresistive material layer (140) arranged between the two.
C: An electroluminescent device, a touch display panel, and a touch display apparatus. The electroluminescent device comprises: an array substrate (101), a first electrode layer (102), an electroluminescent layer (103), a second electrode layer (104), and a pressure sensing layer (105) which is separately electrically connected to the first electrode layer (102) and the second electrode layer (104). The pressure sensing layer (105) is a strain resistance material layer. The strain resistance material layer (105) is driven by a power supply voltage provided by the first electrode layer (102) and the second electrode layer (104) to output a voltage signal.
D: Provided are a capacitive accelerometer of an H-shaped beam and a manufacturing method for the accelerometer. The accelerometer at least comprises: a first electrode structure layer (1), an intermediate structure layer (2), and a second electrode structure layer (3). The first electrode structure layer (1) and the second electrode structure layer (3) respectively are provided with electrode lead-out through holes (9). The intermediate structure layer (2) comprises: an edge frame formed on an oxygen-containing silicon substrate having dual component layers, bilaterally symmetric mass blocks (4), and a bilaterally symmetric H-shaped flexible beam (8) having one beam connected to the edge frame and the other beam connected to the mass block. Anti-overload bumps (5) and damper adjustment grooves (7) are symmetrically arranged on two sides of two mass blocks (4). Also, the H-shaped flexible beam (8) and a bulk silicon layer of the oxygen-containing silicon substrate satisfy therebetween the condition of: √2(a+b+c) &lt; h, where √2d &lt; h, a and c are the widths of the two beams, b is the gap between the two beams, d is the width of the connections where the beams and the mass blocks are connected, and h is the thickness of the bulk silicon layer. The manufacturing method is simple and has a high yield. Components formed are provided with a high degree of normal symmetry, great resistance against lateral impacts and torsional impacts, and reduced cross-sensitivity.
Answer: A