TWI380205B - A method for automatically adjusting capacitance baseline of touch button - Google Patents

Description

1380205 IX. Description of the Invention: [Technical Field] The present invention relates to a method for automatically adjusting a touch button + (Basdme), in particular, a method for adaptively adjusting a touch value (Adaptive Adjustmem) Electrical baseline values [Prior Art] Dynamic adjustment method. Due to the rapid development of technology, the computer has been used or not. Regardless of whether it is Zhuopu's punishment, it can't even be a personal digital assistant (PDA). The host itself remembers (4) brain buttons or function buttons (such as: multimedia playback _ for some control to more directly control the operation of the computer. Control) 'to allow users to traditionally design these buttons, more than half of the design. The mechanical switch button is designed to be more than 7 solid-switching principle' to be used when the user presses the button and releases the button = logic 0 and logic υ as the opening and closing control of the relevant function. However, due to the high cost and short life of the mechanical switch button, the occupied area is also large. Therefore, under the current trend of increasing cost, beautiful appearance and small product size, such mechanical switch buttons have become increasingly incapable of meeting design requirements. Therefore, there is a touch button design and its application, and capacitive touch is the most common. Please refer to the first figure for a flow chart of the operation method of the conventional touch button device. Among them, the touch button device is, for example, matched with at least one capacitive touch button 埠, and we all know that each electric valley touch button 具有 has a background capacitance (Background)

Capacitance) and Finger capacitance. 6 1380205 As shown in the first figure, the steps of the operation method of the touch button device include: first, performing an initialization process (S101) to initialize all the capacitive touch buttons on the touch control device. In order to confirm that the operation is normal, and based on a first scan capacitance value of the capacitive touch button 作为 as a capacitance baseline value (S103), thereby serving as a reference for controlling whether the button 触发 is triggered, and at this time Capacitive touch buttons: 阜 is not receiving the touch pressure of the user's finger' so the first valley value (capacitor baseline value) is equal to the capacitance value provided by the background capacitor. The field is in a state of operation (8) 05) ‘the second scan capacitance value produced by the 2-touch button (. = The second scan capacitor value is greater than the baseline value of the capacitor - pre-required and has a job.疋 'Performance of the situation or the design of the step (S109) is YES, it means that the user's touch pressure is received (second scan power; value;: the sum of the capacitance values of the raw-medium dimension) 'The result of the judgment that will be produced is no, it means that the right step (Sl〇9) of the user’s finger is touched by the touch of the finger. Therefore, if the touch is succeeded, the touch will be designed. At the time of the squatting, there is already the user's hand baseline value, 4 = often: the capacitor that caused the error. 2 2. In the operating state, the background capacitance and ι can be due to the system's power supply, ambient temperature production ':: capacitance value Can be household: production ί: 描 capacitance value will form a 'variable energy can not be correct (four) electric ^ ^ tongue' will be able to form a trigger. "On the button 埠Is there [invention content] There is a method to automatically adjust the capacitance of the touch button to the baseline value of the technology to be solved by this (4), =^ for the system to initialize the program or enter the operating state, == Valley base money line adaptability, called picking material ^ When the operation of the operation is running, it will cause misoperation. In order to solve the above problem, according to the present invention, a key control system for a capacitance baseline value of a touch button is used, wherein the touch button includes a background = a power grid, and the method The step package is used to set a low threshold value by scanning the capacitance value to obtain a capacitance baseline line to obtain an ίίίί grid baseline value. Then, it is judged; the second scan capacitance value generated by the capacitance is used, and the second value is used when the scan two = value is less than the lower limit threshold value. The valley value /, the previous scan capacitance value to calculate the new capacitance baseline. Through the above embodiment, the method for automatically adjusting the touch button or the positive ridge two-line value of the present invention is reduced in the touch by n. In the program - in the state, the adaptable 1380205 can be instantly adjusted to the baseline value of the capacitor, so as to ensure the normal operation and accurate judgment of the touch button system in response to the use of the touch button system, the above overview and The following detailed description and the accompanying drawings are a further description of the effect of the present invention in order to achieve the intended purpose. Other objects and advantages of the present invention are described in the following paragraphs and drawings.隹 、 · · 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 The obtained scan capacitance value is used to calculate a new capacitance baseline value as a reference for the touch button trigger. The present invention is applied to a capacitive touch button system, and those skilled in the art should understand that the touch button system can be applied to various types of electric devices and includes at least one touch button and one capacitor. A detection unit and a control unit. The touch button further has a background capacitance (Background Capacitance) and a finger capacitance (Capacitation) and when the user touches the touch button, the background capacitance is received through the operation of the capacitance detecting unit. And the finger capacitance senses a scan count value (Scan Count), and then with the operation of the control unit for adaptive adjustment (Adaptive Adjustment). Wherein, when a user touches the touch sensitive button, the scan capacitance value is the sum of the capacitance value of the background capacitor and the electrical value of the finger capacitance; otherwise, if no user touches the touch sensitive button, then The scan capacitor value is only the capacitance value of the background capacitor. 9 1380205 Please refer to the second figure, which is a flow chart of a method for automatically adjusting the capacitance baseline value of the touch button according to the present invention. As shown in the figure, the embodiment provides a method for automatically adjusting the capacitance baseline value of the touch button, and the steps include: first, when the electronic device starts to operate, the touch button system is activated (S201), and the touch is performed at this time. The control button system will be based on the background capacitance and the finger-capacitance value generated by the finger capacitance. Next, in this embodiment, a low threshold value (L〇W Threshold) is set according to the obtained capacitance baseline value. . Further, the standby receiving user touches the touch sensitive button. When the user touches the touch sensitive button, the background capacitance and the finger capacitance are further obtained: the generated second scan capacitance value (S2〇7). Then, it is judged whether or not the second scan capacitance value is smaller than the low limit threshold (S209). Because there is an abnormality in the baseline value of the capacitor, or if the result of the step (S209) is YES, it indicates that the line value does not meet the current actual conditions, and the current capacitance base is indicated. Broken benchmark 'is possible

10 Finally, after the step (S213), the method for automatically adjusting the capacitance baseline value of the touch button provided by the embodiment is completed. Then, the step (S207)' or other design actions can be repeated in accordance with the application condition, and there is no limitation here. The above embodiment is merely an overall conceptual concept of the method for automatically adjusting the capacitance baseline value of the touch button of the present invention, and we all know that the initial initialization sequence is included in the operation of the entire touch button system. And the normal operating state after the initialization process is completed. Therefore, please refer to the following description to further describe the detailed operation of the present invention when the touch button system is started to perform an initialization process and enter a normal operating state. Referring to the second figure, a flowchart of an automatic adjustment method of the initialization procedure of the present invention is shown. As shown in the figure, the method for automatically adjusting the capacitance baseline value of the touch button is first described in the initial operation of the button system. It is to first sample a plurality of sample line averaging operations to generate a so-called first-scanning power (and then obtain a capacitance line according to the first scanning capacitance value to make the initial value of the capacitor, and the maximum value is set to be the first-scanning The electric user's finger has already entered the value when initializing the material. However, if the first scanning volume is obtained: the value of the capacitance value is obtained, because: and = is higher than the background capacitance due to misjudgment. In order to adapt to various possible conditions, 1380205 is designed to sample the sample scan design, that is, to set the average operation time after the average operation to the capacitance baseline value. Incidentally, the number of scans of the sample may be, for example, designed to obtain the scan capacitance value in the manner of “predetermined path=value” and the set time, and the scan capacitance value set every other time during the temple period is Used as a sample sweep: the value of the capacitor can be taken as the value of the capacitor. The baseline value of the capacitor is: the value of the scan capacitor that is obtained after the low limit is exceeded. If it is less than the lower limit threshold (can), the judgment result of the second sweep ϊ^:11) is YES, indicating that the contact sense of the first finger to the user's finger is obtained, and the line = two will be The update capacitor baseline value (_) is used to enter the =1^ week and use the currently obtained first her f butterfly to withdraw the money = the value of the judgment: the result is no 'that is the second scan electric shape: first Kind, the second temple is at the lower limit threshold' and this means that there are no following detections when the user first scan capacitance value is detected - scan capacitance sensing; the second case is that the original is the first The contact sensitivity of the user's finger is detected, and the 12 1380205:::: value is also not detected. The user's finger is determined to be 4, and the second case is when the first scan capacitor value is obtained. The contact sensing of the finger is obtained when the second scanning capacitance value is obtained; the contact sensing of the user's finger is used. For the above three cases, the baseline value of the capacitance obtained according to the first scanning subtraction is the control button _ issue the benchmark (S315), and after performing step (10) 5), repeat the step (S 3G9) and the post-production steps, Lang completed the initialization process.

In this way, when the touch button system is initialized, regardless of the influence of the user's finger contact, it can be smoothly operated by adaptive adjustment.

Please refer to the fourth figure again for the implementation of the automatic adjustment method in the normal operation state of the present invention. For example, the first step is used to explain the automatic adjustment of the touch and then the capacitance baseline (4). The method is difficult to press (4) and start the normal operation state (S4G1). The same is based on the first-scan capacitance value generated by the background capacitance and the finger capacitance to obtain the capacitance base value (S403). However, since this embodiment is for explaining the operation situation in which the normal operation state has been entered, the capacitance baseline value therein may be, for example, taken from the last obtained capacitance baseline value in the initialization procedure. In the normal operation state of the touch button system, the capacitance value of the background capacitor and the capacitance of the finger capacitor (four) are relatively changed in order to avoid the change of the external factors such as the power supply change of the touch button system and the ambient temperature. The touch button system thermal method correctly determines whether the current touch button has a trigger. Therefore, the actual threshold is based on the baseline value of the capacitor to set a low threshold and a high threshold (High 13 1380205

Threshold) (S405). For convenience of explanation, please refer to the fifth figure at the same time as the fourth picture of Zhukao, which is a schematic diagram of an embodiment of the high limit threshold and the low limit threshold in the normal operation state of the present invention. The threshold value Η is, for example, designed as a capacitance baseline value and a “preset capacitance value (H = Baseline + X); and the low limit threshold value ^ is, for example, a second baseline value and a preset capacitance value. The sum of /2 (L = two + X/2) 'and the preset f-capacity is at least designed to be a rated minimum effective capacitance value of the capacitance of the touch-axis. Of course, this one is a design aspect of the embodiment, and is not intended to limit the present ten. Only the Ge 2 touch button system can wait for the user to touch the sensor at any time in the normal operation state. And = when there is a user's finger to make contact sensing, determine whether the value of the capacitance-known capacitance is greater than the high limit threshold H (S409). If the judgment result of the first -ms4G9) is YES, it means that the current generated ΐ 知 把 把 已 已 已 已 已 已 电 Η Η 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 并且 料 料 料 料 料 料 料 料 料 料 料 料Therefore, the baseline value of the capacitor before n: is the trigger reference of the touch button, and J _ 彳 彳 唬 is given to the electronic device at the back end (S411), so as to enable the touch button function of the early selection. And if the step (just) junction = bound: = = =, the capacitance value is less than or equal to Lei Xuanxin can also change the capacitance value of the moon and the capacitance of the finger and the external factor of the finger capacitance. 'Therefore, the gamma-capacitance value is less than the low-limit threshold L (S413). If the value of YES=Γ413) is YES, it means that the second scan capacitance 'minimum limit is L, which means that the capacitance value of the current background capacitance is changed by the susceptibility, and the confirmation will be shaped. At present, ==(_=), in order to carry out the steps, in order to adjust the steps with the _t 仃 仃 step (S4G5) and its subsequent steps and waiters. In the present embodiment, the basis of the 4-line value is actually modified in the actual design.

The average operation is used to update the Ray II:), such as the following formula, which is repeated multiple times, and if the actual situation is the value of the 彳τ private capacitor that must be f, the averaging operation is performed.

Baseline: Scan Count a ns! η

In the above, if the result of the determination in the step (S413) is NO, it means that the second scan capacitance value is less than or equal to the high limit threshold value Η and is greater than or equal to the low limit threshold value L. At this time, it is determined in the design that it is impossible to clearly confirm whether the touch button can be triggered. Therefore, it is confirmed that the original capacitance baseline value is the trigger reference of the touch button (S417), but the interrupt signal is not output, but directly The step (S407) is further performed. Those skilled in the art should be able to understand that the step (S407) performed at this time is used to obtain the second scan capacitance value, and does not mean that the previously determined second scan capacitance value is obtained, but refers to re-detection. And the next scan capacitance value is obtained to repeat the relevant judgment process 'to confirm whether the capacitance baseline value needs to be updated. Therefore, by repeating the step flow of the embodiment, the touch key system can be adaptively adjusted at any time in response to changes in external factors under normal operating conditions. 15 1380205 In summary, the method for self-baseline value provided by the present invention mainly uses the touch button: the capacitor of the positive touch button enters the operating state, and the automatic initialization process or the whole can be performed to enable Instantly adjust the touch button to the line value to ensure that the touch button system is positive; the operation == break = condition, but the above is only for the device and the drawing of the present invention. Limiting the present invention = thinking about changes or modifications "in two [simplified description of the schema] = a diagram of the operation method of the conventional touch button device of the prior art; the first example of the capacitor application process of the automatic light button The second embodiment of the present invention is a diagram of an automatic adjustment method of the initialization procedure of the present invention; the fourth diagram is a flowchart of an embodiment of the automatic adjustment method of the present invention in a normal operation state; and the fifth diagram is a normal operation of the present invention. Schematic diagram of an example of a high-limit threshold and a low-limit threshold in a state. [Explanation of main component symbols] [Prior Art] si〇i~Siii Conventional Technology Flowchart Step Description 16 1380205 [Invention] Limit threshold L low limit threshold S201~S213 Flowchart step description S301~S315 flowchart step description S401~S417 flowchart step description

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Claims (1)

Patent application scope: The method for adjusting the capacitance baseline value of the touch button is applied, the key touch system includes a background capacitance and a finger capacitance, and the method comprises the following steps: And the first capacitance value generated by the finger capacitance to obtain a capacitance baseline value; Tian Yi, the capacitance baseline value is set - the low limit threshold value; the pickup 4 background capacitance and the finger capacitance generated - the second scan Pushing the capacitance value; and, when the second scan capacitance value is less than the low limit threshold value, the second scan capacitance value is used to correct the capacitance baseline value. The automatic adjustment of the touch button as described in the first item of the patent 祀11 = square: 4 in the package, the key touch system is carried out - the first = description; the second to perform an average operation Wang 4 first known capacitance value; And become the lower limit threshold. The second method of automatically adjusting the electric grid base value of the touch button, the step of the step includes: the electric is determining the second scan i ^, the μ 碹# each value or the temple at the lower limit threshold quasi,. "The respective baseline values are the triggering patent range of the touch button. The first automatic touch of the touch button is the electric == method', in which the touch system is in the -> normal operation state, Further includes: 疋 6 7 For example, step-by-step setting - high limit threshold. The method of the baseline value 2 automatically adjusts the power of the touch button = the second scan capacitance value:: when determining the high limit threshold, it is determined whether the Z value is less than the lower limit threshold; and after the capacitance value When it is determined that the second scanning capacitor touches the batch L to the threshold value, the current value of the capacitor is used as the gas, and the __ triggering reference of the control button is used to perform the round-out signal. " The method for automatically adjusting the electric line value of the touch button according to the fifth item further includes: at =========================================================================== The method for automatically adjusting the electric valley line value of the touch button as described in the sixth item of the triggering of the touch button is to find the second scan capacitor (four) to enter the step capacitor value. The averaging operation is to modify and update the method for automatically adjusting the wire value of the touch button according to item 4 of the 8 (9) patent scope, wherein the high_bound value is designed as the baseline value of the capacitor and the preset capacitance value. The sum, and the lower limit threshold is set to S 10 is the sum of the baseline value of the 5 mystery capacitance and the half of the preset capacitance value. 9. The method of automatically adjusting the capacitance baseline value of the touch button as described in Item 8 of the patent 1 color circumference, wherein the preset capacitance value is at least a rated minimum effective capacitance value of the finger capacitance. 19