Touch scanning circuit, touch driving circuit and touch display screen
A technology of touch scanning and circuit, which is applied in the field of touch scanning circuit, touch driving circuit and touch display screen, and can solve the problems of restricting the application of embedded technology, increasing and increasing the wiring space, etc.
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example 1
[0115] in Figure 4a In the touch scanning circuit shown, the effective pulse signal of the input signal Input is a high potential signal, the first potential is a high potential, the second potential is a low potential, the voltage of the first direct current source VG1 is a high potential, and the second direct current The voltage of source VG2 is low potential, all switching transistors are N-type transistors, and the corresponding input and output timing diagrams are as follows Figure 6a Shown. Specifically, select such as Figure 6a There are three stages of T1, T2 and T3 in the input and output timing diagram shown.
[0116] In the T1 phase, Input=1, CK1=0, and CK2=0. Since Input=1, the fourth switch transistor T4, the fifth switch transistor T5, and the sixth switch transistor T6 are turned on, the potential of the second node B is a low potential, the second output terminal Out2 outputs a low potential signal, and the third output terminal Out3 A high potential signal i...
example 2
[0124] in Figure 4b In the touch scanning circuit shown, the effective pulse signal of the input signal Input is a low potential signal, the first potential is a low potential, the second potential is a high potential, the voltage of the first DC source VG1 is a low potential, and the second DC The voltage of the source VG2 is high, and all switching transistors are P-type transistors. The corresponding input and output timing diagrams are as follows Figure 6b Shown. Specifically, select such as Figure 6b There are three stages of T1, T2 and T3 in the input and output timing diagram shown.
[0125] In the T1 phase, Input=0, CK1=1, and CK2=1. Since Input=0, the fourth switch transistor T4, the fifth switch transistor T5, and the sixth switch transistor T6 are turned on, the potential of the second node B is high, the second output terminal Out2 outputs a high potential signal, and the third output terminal Out3 A low potential signal is output, the potential of the first node ...
example 3
[0133] in Figure 5a In the touch scanning circuit shown, the effective pulse signal of the input signal Input is a high potential signal, the first potential is a high potential, the second potential is a low potential, the voltage of the first direct current source VG1 is a high potential, and the second direct current The voltage of source VG2 is low potential, all switching transistors are N-type transistors, and the corresponding input and output timing diagrams are as follows Figure 7a Shown. Specifically, select such as Figure 7a There are four stages T1, T2, T3 and T4 in the input and output timing diagram shown.
[0134] Specifically, in the T1, T2, and T3 stages, CK3=0, the twelfth switching transistor T12 is in the off state, and the specific working process of the touch scanning circuit is the same as the working process of the three stages T1, T2, and T3 in Example 1. , I won’t repeat it here.
[0135] In the T4 stage, Input=0, CK1=0, CK2=0, CK3=1. Since CK3=1, the...
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