Call mistaken touch prevention control device and method based on double-infrared cooperation

Abstract

The invention discloses a call mistaken touch prevention control device and method based on double-infrared cooperation, and the method comprises the steps: respectively collecting the distance information between a terminal and an external object in a call state through arranging a first infrared sensor and a second infrared sensor at two sides of a receiver region of a mobile terminal; and carrying out cooperative judgment based on the two independent distance detection results so as to identify whether the terminal is in a close use state or not. When it is judged that the touch screen is in the close state, touch signal shielding is carried out on the preset area of the touch screen, and selective control is carried out on physical key input, so that mistaken touch operation caused by contact of the face or other objects in the call process is avoided. According to the invention, through double-infrared cooperative judgment and a regionalized touch control mechanism, while the accuracy of close state recognition is improved, the availability and reliability of call operation are considered, and the method is suitable for mobile terminal equipment with a touch screen.

Description

Technical Field

[0001] This invention relates to the field of human-computer interaction control technology for mobile terminals, and in particular to a call anti-mistouch control device and method based on dual infrared collaboration. Background Technology

[0002] With the widespread adoption of smart mobile devices, touchscreens have become the primary human-computer interaction method. In voice call scenarios, users typically need to hold the device close to their face, and facial skin, ears, or cheeks are prone to unintentional contact with the touchscreen, leading to accidental touch operations, such as accidentally hanging up, accidentally muting, or accidentally triggering other interface functions, which seriously affects the continuity of the call and the user experience.

[0003] To address the aforementioned issues, existing technologies typically employ infrared proximity sensors embedded in the terminal to detect the distance between the terminal and the human body, and then restrict touch functionality when an object is detected approaching. However, existing solutions are mostly based on a single infrared sensor, whose detection results are easily affected by ambient light intensity, reflection angle, and the reflectivity of different skin tones. In complex usage environments, this can easily lead to false alarms or missed alarms, resulting in unstable anti-accidental touch performance.

[0004] Furthermore, existing call accidental touch prevention solutions generally employ a full-screen blocking approach in their touch control strategies. This means that upon detecting close proximity, the entire touchscreen's input function is directly disabled. While this reduces the probability of accidental touches to some extent, it also restricts the use of necessary operations during calls, reducing the flexibility of system interaction. Regarding physical button control, current technologies typically lock volume buttons, power buttons, and other similar functions uniformly, still failing to balance the need for accidental touch prevention with the convenience of call operation.

[0005] Therefore, existing call anti-mistouch technologies still have shortcomings in terms of the accuracy of proximity recognition, the precision of touch shielding, and the rationality of button control, and need further improvement.

[0006] Therefore, existing technologies still need to be improved. Summary of the Invention

[0007] Given the shortcomings of the existing technologies, there is an urgent need for a more accurate anti-mistouch control scheme that can identify the proximity of the terminal in a call scenario to avoid accidental touches caused by misjudgment. Simultaneously, this scheme should, while effectively preventing accidental touches, also accommodate the necessary touch operations and physical button usage during calls, thereby improving the rationality of human-computer interaction and user experience in call scenarios.

[0008] The technical solution of the present invention is as follows: This invention provides a call mis-touch prevention control device based on dual infrared collaboration, comprising: The first infrared sensor and the second infrared sensor are located on both sides of the earpiece area of ​​the mobile terminal. They are used to collect distance information between the mobile terminal and external objects during a call. The processing unit is used to collaboratively determine the distance information collected by the first infrared sensor and the second infrared sensor. When the distance information collected by the first infrared sensor and the second infrared sensor both meet the proximity determination conditions, a proximity determination result is generated. A touch control unit is used to shield touch signals from a preset area of ​​the touch screen in the proximity state. A button control unit is used to selectively control the physical button input of the mobile terminal according to the proximity state during the call. The collaborative determination is triggered based on at least two independent distance detection results jointly satisfying a preset condition.

[0009] In one embodiment, the first infrared sensor and the second infrared sensor are respectively disposed on the left and right sides of the earpiece, with a distance of 3 to 5 mm between them, and are disposed at an inclined angle relative to the plane of the earpiece.

[0010] In one embodiment, the collaborative determination includes: when the distance information collected by the first infrared sensor is less than a first distance threshold, and the distance information collected by the second infrared sensor is less than the first distance threshold, it is determined to be a close proximity state.

[0011] In one embodiment, a state maintenance interval is set between the first distance threshold and the second distance threshold. When the distance information falls into the state maintenance interval, the previous determination state remains unchanged.

[0012] In one embodiment, the touch control unit is used to shield touch signals only from a portion of the display area of ​​the touch screen in the proximity state.

[0013] In one embodiment, the partial display area is the lower half of the display area divided along the longitudinal direction of the touch screen.

[0014] In one embodiment, the button control unit is used to intercept input signals from the volume and power buttons while maintaining the hang-up button function during a call and when the device is in close proximity.

[0015] In one embodiment, the processing unit is configured to initiate distance detection of the first infrared sensor and the second infrared sensor when a call setup event is detected.

[0016] In one embodiment, the processing unit is configured to, upon detecting a call end event, de-mask the touch signal and restore the normal function of the physical buttons.

[0017] In another aspect, the present invention provides a call mis-touch prevention control method based on dual infrared collaboration, comprising: When the mobile terminal enters a call state, distance information from the first infrared sensor and the second infrared sensor is collected respectively; Based on two independent distance detection results, a collaborative determination is made to generate a close or far state. When in close proximity, touch signals are shielded in a preset area of ​​the touchscreen, and physical button input is selectively controlled; When the call ends, the touch signal shield is removed and the physical button functions are restored.

[0018] In summary, this invention, by introducing a dual-infrared sensor collaborative judgment mechanism, transforms the identification of terminal proximity from relying on a single detection result to a comprehensive judgment based on multiple independent distance information, effectively improving the accuracy and stability of proximity recognition in call scenarios. Simultaneously, in the proximity state, touch signals are only blocked in a preset area of ​​the touchscreen, and physical button input is differentiated, ensuring that accidental touch prevention no longer sacrifices necessary operations, thus achieving a more reasonable balance between accidental touch prevention effectiveness and call interaction usability. This technical solution has a clear structure and well-defined implementation path, can adapt to different usage environments and user habits, and possesses good engineering feasibility and practical application value.

[0019] Compared with existing call accidental touch prevention technologies, this invention does not simply reduce the probability of accidental touch by increasing the number of sensors or expanding the shielding range. Instead, it uses dual infrared sensors to collaboratively determine the proximity status and uses the determination result as a system-level control condition, introducing a regional touch shielding and differentiated button control mechanism, thereby achieving a comprehensive effect that exceeds the expectations of traditional technologies.

[0020] First, by using the collaborative judgment of two independent infrared sensors, rather than triggering the anti-mistouch logic with a single detection result, the recognition of proximity is transformed from a "single-point judgment" to a "multiple conditions being met" judgment mode. This significantly reduces the probability of misjudgment caused by changes in ambient light, differences in reflection angle, or skin color differences. This collaborative result-based triggering method achieves higher recognition stability without relying on complex algorithms or additional sensors, and its effect is not simply a linear summation of existing single-sensor solutions.

[0021] Secondly, upon detecting a close proximity, this invention does not employ the common full-screen blocking strategy found in existing technologies. Instead, it only blocks touch signals from a preset area of ​​the touchscreen, allowing users to still perform necessary operations during a call. This design breaks with the traditional understanding that "preventing accidental touches inevitably sacrifices operability." While effectively suppressing accidental touches, it significantly improves the rationality of human-computer interaction in call scenarios. This effect cannot be achieved by simply adjusting the timing or intensity of blocking in existing technologies.

[0022] Furthermore, this invention provides differentiated control over physical button input in close proximity, blocking only the volume and power buttons that are prone to accidental touches while retaining the hang-up button's validity. This ensures that critical operations during a call are both safe and controllable. Compared to existing technologies that uniformly lock all side buttons, this solution reduces the risk of accidental operation while still guaranteeing timely response to call control, resulting in a significantly improved overall user experience.

[0023] In summary, this invention achieves a better balance between proximity recognition accuracy, accidental touch prevention effect, and call operation usability by combining dual infrared collaborative judgment with regional control strategy. The comprehensive technical effect obtained exceeds the usual expectations of existing technologies in the field of call accidental touch prevention, and has significant practical value and promotion significance. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 A system structure diagram of a call mis-touch prevention control device based on dual infrared collaboration provided by the present invention; Figure 2 A schematic diagram showing the specific positions and angles of the first and second infrared sensors in a call anti-mistouch control device based on dual infrared collaboration provided by the present invention. Figure 3 The present invention provides a layout diagram of the infrared sensors in the earpiece area of ​​a call anti-mistouch control device based on dual infrared collaboration; Figure 4 This invention provides a dual-infrared sensor collaborative anti-mistouch system architecture diagram for a call anti-mistouch control device based on dual-infrared collaboration; Figure 5 The present invention provides a flowchart of the steps of a call mis-touch prevention control method based on dual infrared collaboration. Detailed Implementation

[0025] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. The embodiments of the invention are described below in conjunction with the accompanying drawings.

[0026] One embodiment of the present invention provides a call mis-touch prevention control device based on dual infrared collaboration. Please refer to [link to relevant documentation]. Figures 1-4 ,include: The first infrared sensor 1 and the second infrared sensor 2 are set on both sides of the earpiece area of ​​the mobile terminal. They are used to collect distance information between the mobile terminal and external objects respectively during a call. Processing unit 3 is used to collaboratively determine the distance information collected by the first infrared sensor 1 and the second infrared sensor 2. When the distance information collected by the first infrared sensor 1 and the second infrared sensor 2 both meet the proximity determination conditions, a proximity state determination result is generated. The touch control unit 4 is used to shield the touch signal of a preset area of ​​the touch screen in the close proximity state; The button control unit 5 is used to selectively control the physical button input of the mobile terminal according to the proximity state during the call. The collaborative determination is triggered based on at least two independent distance detection results jointly satisfying a preset condition.

[0027] The dual-infrared collaborative call anti-mistouch control device provided by this invention is applied to mobile terminals with touchscreens, such as smartphones. The device is integrated into the system architecture of the mobile terminal and is used to identify proximity usage during calls and execute anti-mistouch control accordingly.

[0028] First, call status detection is performed: After the baseband chip detects a call establishment signal (such as the "RING" command in GSM network or the "CALL_CONNECTED" status code in LTE network) through the AT command set, it sends an interrupt signal to the main control chip, triggering the anti-accidental touch module to activate from the sleep state.

[0029] The device includes a first infrared sensor 1 and a second infrared sensor 2, which are respectively disposed on the left and right sides of the earpiece area of ​​the mobile terminal. By arranging the infrared sensors near the earpiece so that they are directly facing the user's face during a call, distance information between the terminal and the face can be collected. In practical applications, both the first infrared sensor 1 and the second infrared sensor 2 can be near-field infrared proximity sensors, used to periodically output detection signals reflecting changes in the distance between the terminal and external objects.

[0030] Both the first infrared sensor 1 and the second infrared sensor 2 are connected to the processing unit 3. The processing unit 3 can be implemented by the main control chip of the mobile terminal or its internal processing module. It receives distance detection data from the two infrared sensors and performs collaborative judgment processing on the data. Specifically, during a call, the processing unit 3 simultaneously acquires the distance detection results from the first infrared sensor 1 and the second infrared sensor 2, and makes a judgment based on a preset collaborative judgment rule. When the distance detection results corresponding to both infrared sensors meet the proximity judgment condition, the processing unit 3 generates a proximity state judgment result. By requiring at least two independent distance detection results to simultaneously meet the condition, the impact of misjudgment from a single detection result on the overall judgment can be effectively reduced.

[0031] The sensor wake-up process in this embodiment of the invention is as follows: After receiving the trigger signal, the main control chip sends a start command (0x01 hexadecimal command word) to the dual sensors through the I2C bus. The sensors switch from low power mode (current <0.5mA) to working mode (current 10mA), and the sampling frequency is set to 100 Hz, that is, distance and reflectivity data are collected once every 10 ms.

[0032] The processing unit 3 is also connected to the touch control unit 4. The touch control unit 4 is used to shield touch signals from a preset area of ​​the touchscreen when the processing unit 3 determines that the touchscreen is in a close proximity state. In a specific implementation, the touch control unit 4 can intercept or ignore touch events in the corresponding area of ​​the touchscreen by sending control commands to the touch driver module, thereby preventing accidental touches caused by facial or other non-subjective contact. This preset area can be configured according to actual needs, for example, as the lower half of the touchscreen, to retain necessary operable areas while preventing accidental touches.

[0033] Furthermore, the processing unit 3 is also connected to the button control unit 5. The button control unit 5 is used to selectively control the physical button input of the mobile terminal based on the proximity status during a call. In the proximity status, the button control unit 5 can block accidental presses of physical buttons such as the volume and power buttons, while maintaining the functionality of necessary buttons such as the hang-up button, thereby avoiding accidental operation caused by face contact and ensuring the reliability of call control.

[0034] Through the coordinated operation of the aforementioned device units, this embodiment can accurately identify whether the terminal is in close proximity during a call, and reasonably control the touch screen and physical buttons in the close proximity state. This reduces the risk of accidental touches while ensuring the usability of call operations and improving the overall user experience.

[0035] For further embodiments, please refer to Figure 2The first infrared sensor 1 and the second infrared sensor 2 are respectively disposed on the left and right sides of the earpiece, and the distance between them is 3 to 5 mm, and they are disposed at an inclined angle relative to the plane of the earpiece.

[0036] In the actual structural design, a differentiated dual infrared sensor layout scheme is adopted. The earpiece area is usually located at the upper front of the mobile terminal, close to the user's ear and face. This device adopts a dual infrared sensor collaborative detection scheme, selecting the Sharp GP2Y0A21YK model sensor, whose detection distance covers a range of 1-15 cm with an accuracy of ±0.5 cm, which can meet the requirements for close-range human body sensing. The first infrared sensor 1 and the second infrared sensor 2 are respectively arranged on the left and right sides of the earpiece. The first infrared sensor 1, i.e., the infrared emitter, is located on the left side of the earpiece, and the second infrared sensor 2, i.e., the infrared receiver, is correspondingly located on the right side. This allows the two sensors to correspond to different contact areas of the user's face during a call, thus forming independent yet spatially related distance detection paths.

[0037] By controlling the distance between the two infrared sensors to 3-5 mm, the distance between the first infrared sensor 1 and the left edge of the earpiece is 0.8 mm, the distance between the second infrared sensor 2 and the right edge of the earpiece is 0.8 mm, and the horizontal distance between the two sensors is 4 mm. To avoid light path obstruction, a circular opening with a diameter of 1.2 mm is opened on the outer shell corresponding to the sensor position. The edge of the opening is rounded with 0.2 mm to reduce stray light interference. By optimizing the skin reflection path of the infrared signal, the sensitivity and anti-interference ability of face proximity detection are effectively improved. This ensures that the two sensors have sufficient spatial differentiation, avoiding highly similar detection results due to their close proximity, and also ensures that both are within the effective detection range of the face proximity area, thus solving the technical pain point of traditional single sensors being easily affected by ambient light interference.

[0038] Please continue reading. Figure 2 Meanwhile, the first infrared sensor 1 and the second infrared sensor 2 are not completely parallel to the earpiece plane, but are installed at an angle relative to the earpiece plane. Preferably, they are installed at a 15° angle to the earpiece plane to optimize the detection angle for cheek-to-cheek movements. By tilting the emission and reception directions of the infrared sensors, the infrared detection light path more closely matches the actual reflection path when the user's face is close, thereby improving the sensitivity and stability of detecting close-up facial states during calls. This structural design helps reduce detection anomalies caused by changes in facial angle, partial obstruction, or reflection angle deviations, providing a more reliable source of basic data for subsequent collaborative judgments.

[0039] The sensor is powered by a 3.3V DC power supply. The VCC pin is connected to the motherboard power management module via an LC filter circuit (a 10 μF electrolytic capacitor and a 0.1 μF ceramic capacitor in parallel) to ensure that the power supply ripple is less than 50 mV. The analog distance signal output from the sensor's OUT pin is converted into a digital signal by a 12-bit ADC converter (sampling rate 1 MSPS), and then connected to the GPIO_14 and GPIO_15 ports of the main control chip (such as Qualcomm Snapdragon 8 Gen3) via the I2C protocol interface. The communication rate is set to 400 kHz, and data transmission uses a CRC8 check mechanism to ensure integrity.

[0040] By employing the symmetrical layout, defined spacing, and tilted arrangement of the sensors in the earpiece area, this embodiment provides stable, consistent, and discriminative distance detection conditions for dual infrared collaborative determination at the structural level.

[0041] In a further embodiment, the collaborative determination includes: when the distance information collected by the first infrared sensor 1 is less than a first distance threshold, and the distance information collected by the second infrared sensor 2 is less than the first distance threshold, it is determined to be a close proximity state.

[0042] The data acquisition and fusion process in this embodiment of the invention is as follows: The sensors output raw distance data d1 (first infrared sensor 1) and d2 (second infrared sensor 2) every 10 ms. The main control chip synchronously performs moving average filtering on the dual-channel data to obtain the fused average distance d_avg. Reflectivity data is acquired through an independent ADC channel and forms a timestamp-aligned data packet with the distance data.

[0043] Skin feature recognition is achieved by analyzing differences in infrared reflectivity. The reflectivity of human skin to 940 nm infrared light is stable in the range of 65% - 85%. The device locks the reflectivity threshold within this range through a calibration procedure, which can effectively distinguish skin from interfering objects such as clothing and desktops.

[0044] The processing unit 3 employs a collaborative judgment mechanism based on dual infrared sensors, innovatively adopting a dual-distance threshold fusion judgment mechanism. In its implementation, during a call, the processing unit 3 simultaneously receives distance detection results from the first infrared sensor 1 (real-time acquisition of distance parameter d1) and the second infrared sensor 2 (synchronous acquisition of distance parameter d2). The embedded microprocessor performs data fusion calculations and processes the two detection results in parallel. When the system determines that d1 < 3cm and d2 < 3cm, and the reflectivity is within the 65% - 85% range, it triggers "close proximity" recognition. If either sensor detects a distance ≥ 3cm or the reflectivity exceeds the threshold range, it is determined to be in "far distance" status. Within the 3 - 5cm range, the previous state is maintained, eliminating boundary jitter.

[0045] Unlike existing technologies that directly trigger anti-mistouch logic based solely on a single sensor's detection result, this implementation requires that the distance detection results from both infrared sensors simultaneously meet the proximity judgment condition before generating a proximity state judgment result. This approach effectively avoids misjudgments caused by factors such as changes in ambient light, abnormal reflection angles, or partial obstruction of a single sensor. Furthermore, this dual verification logic reduces the misjudgment rate to 1 / 5 of traditional solutions, significantly improving the reliability of state recognition.

[0046] The first distance threshold can be set based on the terminal's structural dimensions, infrared sensor performance, and the user's typical usage distance during a call. It is used to characterize the distance range when the terminal is in a close-to-face usage state. In practical applications, when only one infrared sensor detects a distance less than the first distance threshold, while the other infrared sensor's detection result does not meet the condition, the processing unit 3 will not immediately determine it as a close-to-face state. This avoids misidentifying non-call close-to-face situations such as brief obstruction or partial proximity as valid close-to-face states.

[0047] By adopting the collaborative determination method that simultaneously satisfies the above two conditions, the triggering of the proximity state no longer depends on a single detection result, but is based on the consistency of two independent distance detection results. This makes the proximity state determination more consistent with the physical characteristics of the terminal being actually close to the face during a call, providing a more reliable basis for subsequent touch screen area shielding and button control.

[0048] In a further embodiment, a state holding interval is set between the first distance threshold and the second distance threshold. When the distance information falls into the state holding interval, the previous determination state remains unchanged.

[0049] In actual use, the distance between a mobile terminal and the user's face during a call is not always static. Slight head movements, changes in hand posture, or adjustments to the call position can cause minor fluctuations in the distance between the terminal and the face within a short period. If the decision to switch between close and distant states is based solely on a single distance threshold, frequent state switching can easily be triggered near the critical distance, leading to repeated execution of touchscreen disable and unlock operations, impacting system stability and user experience.

[0050] Based on the above considerations, this embodiment introduces a state-holding interval between the proximity determination threshold and the distance determination threshold. When the distance information collected by the first infrared sensor 1 and the second infrared sensor 2 falls within this state-holding interval, the processing unit 3 does not immediately update the proximity or distance determination result, but maintains the previously determined state. In this way, the jitter effect of the distance detection result near the threshold boundary can be effectively eliminated, avoiding misjudgments caused by short-term, minute distance changes.

[0051] This state preservation mechanism is not a simple delayed judgment, but a stable control strategy introduced based on the actual usage behavior characteristics in the call scenario. It makes the entry and exit of the close state have clear and stable trigger conditions, thereby providing a continuous and reliable state foundation for subsequent touch control and button control.

[0052] In a further embodiment, the touch control unit 4 is used to shield the touch signal only from a portion of the display area of ​​the touch screen in the proximity state.

[0053] In its implementation, the touch control unit 4 constructs a regional shielding model based on big data analysis of user behavior. Instead of uniformly shielding the entire touchscreen in close proximity, it manages the touchscreen in regions based on the actual distribution of user face contact with the terminal during a call. Statistical analysis of screen contact areas from 100,000 call samples revealed that user cheek contact is primarily concentrated in the lower half of the screen (50%), followed by the lower-middle edge area (30%). Based on this, the system divides the screen into three levels of protection zones. In close proximity, it automatically activates the touch signal shielding of the corresponding zone while preserving the operational usability of the upper half of the screen, balancing accidental touch prevention and functional convenience. When the processing unit 3 determines that the mobile terminal is in close proximity, the touch control unit 4 sends a control command to the touch driver module, intercepting only touch events within a preset area, while maintaining normal response to touch inputs in other areas.

[0054] By employing the aforementioned regional touch shielding method, accidental touches caused by contact between the face or cheek and the touchscreen can be effectively avoided, while preserving the necessary operable areas during a call. For example, users can still hang up or perform other necessary interactions during a call without completely disabling the anti-accidental touch mode. Compared to the common full-screen shielding solutions in existing technologies, this implementation significantly improves the interactive flexibility in call scenarios without compromising the anti-accidental touch effect.

[0055] In addition, the way the touch control unit 4 shields part of the display area can be adjusted through software configuration, which makes it easy to adapt to different terminal sizes, screen ratios or usage habits, thereby enhancing the versatility and engineering feasibility of the solution.

[0056] In a further embodiment, the touch control unit 4 is used to shield the touch signals of the lower half of the display area divided along the longitudinal direction of the touch screen when in a close proximity state.

[0057] In this embodiment, the partial display area is the lower half of the display area divided along the vertical direction of the touch screen. In the "close to skin" state, the main control chip sends a command to the touch IC to intercept the touch signals of the 0-50% area of ​​the screen's Y-axis coordinate (corresponding to the easily touched area of ​​the cheek). At the same time, it controls the side button control module through GPIO to cut off the signal paths of the volume up button (KEY_VOLUME_UP), volume down button (KEY_VOLUME_DOWN), and power button (KEY_POWER), retaining only the functionality of the hang-up button (KEY_END_CALL).

[0058] Specifically, in call scenarios, users typically hold the mobile terminal close to their face, making the lower half of the terminal more likely to make unintentional contact with the cheek, jaw, or hand. Based on these usage characteristics, this embodiment divides the touchscreen into an upper display area and a lower display area along the vertical direction, with the lower display area corresponding to the lower 50% of the touchscreen's height. When the processing unit 3 determines that the device is in a close-up state, the touch control unit 4 only intercepts or ignores touch signals within the lower display area, without affecting normal touch input in the upper display area.

[0059] By limiting the touch-blocking area to the lower half of the display area, accidental touches caused by facial or cheek contact can be effectively suppressed while retaining necessary operation entry points located in the upper half of the display area, such as the hang-up button or function control area in the call interface. Compared with the existing technology that directly blocks the entire touchscreen, this implementation significantly improves the usability of interactive operations during calls while maintaining essentially the same level of accidental touch prevention.

[0060] Furthermore, the division of the lower display area has clear spatial boundaries, making it easy to implement through the touch driver layer or system interface layer without relying on additional complex algorithms or hardware support, thus demonstrating good engineering feasibility. This area division method can also be adapted to different terminal screen sizes, thereby enhancing the versatility of the solution.

[0061] In a further embodiment, the button control unit 5 is used to intercept the input signals of the volume button and the power button while maintaining the hang-up button function when in a call state and in a close proximity state.

[0062] During a call, mobile terminals typically have physical buttons such as volume buttons and power buttons in addition to the touchscreen. When the terminal is held close to the face, the user's side or hand may accidentally touch these physical buttons, causing sudden volume changes, call interruptions, and other abnormal situations. To address these issues, this implementation does not uniformly lock all physical buttons, but instead introduces a differentiated button control strategy.

[0063] Specifically, when processing unit 3 determines that the terminal is in a call and is close to the user, button control unit 5 intercepts the regular input signals of the volume and power buttons, preventing them from triggering the corresponding system functions, and only retains the direct hardware circuit connection for the hang-up button. Simultaneously, button control unit 5 keeps the hang-up button functional, ensuring that the user can still end the call through a clear operation. This approach effectively avoids accidental volume changes or unexpected shutdowns caused by accidental touches, while ensuring the reliability and predictability of call control. This design, through low-level driver-level button signal redirection, completely eliminates the risk of accidental volume adjustment or call termination by touch from the side, while ensuring that the response speed for hang-up operations in emergencies is not affected.

[0064] This button control strategy works in conjunction with the lower half-area shielding mechanism of the touchscreen. The hardware layer provides precise distance data, the algorithm layer implements intelligent state determination, the shielding layer performs area touch management, and the control layer ensures the effectiveness of critical operations. Together, they construct a multi-dimensional call accidental touch prevention solution, enabling accidental touch protection in call scenarios to cover both touch input and physical button input, thus forming a complete accidental touch prevention control loop. Compared to existing technologies that simply disable all side buttons, this implementation significantly improves the user experience during calls while reducing the risk of accidental operation.

[0065] In a further embodiment, the processing unit 3 is also used to control the touch control unit 4 and the button control unit 5 to return to the normal input state when the terminal is detected to switch from a close-up state to a non-close-up state.

[0066] When the baseband chip detects a call termination signal (such as when the user presses the hang-up button or the other party ends the call), it sends a reset command to the main control chip. The main control chip then releases the area shielding of the touch IC and cuts off the side button signal. The sensor returns to low-power mode and waits for the next call to trigger.

[0067] In practical use, mobile terminals may frequently switch between close-to-ear and non-close-to-ear states during calls, such as when a user moves the terminal away from their ear to view the call interface or adjusts their holding posture. To avoid continuous interference with normal interaction caused by the anti-mistouch control strategy, this implementation introduces an automatic recovery mechanism based on state changes.

[0068] Specifically, processing unit 3 continuously receives detection results output by proximity detection unit. When the detection result switches from proximity state to non-proximity state, processing unit 3 generates a recovery control command and sends the command to touch control unit 4 and button control unit 5. Upon receiving the recovery control command, touch control unit 4 removes the touch blocking restriction previously set for the lower half of the display area, allowing the entire display area of ​​the touch screen to resume normal response to touch input; button control unit 5 simultaneously removes the blocking restriction on the input signals of the volume and power buttons, allowing the relevant physical buttons to restore their original functions.

[0069] The state-driven recovery mechanism described above ensures that the anti-mistouch control only takes effect when the user is in a truly necessary close-up position. Once the user actively moves away from the close-up posture, the terminal can promptly return to the normal interaction mode. This approach avoids the "function lockout" problem caused by the anti-mistouch strategy not exiting in a timely manner in existing technologies, thus significantly improving the naturalness and consistency of the overall interaction.

[0070] In a further embodiment, the processing unit 3 is also used to control the touch control unit 4 and the button control unit 5 to exit the anti-mistouch control mode when the call ends.

[0071] After a call ends, the anti-mistouch control strategy becomes meaningless regardless of whether the terminal is still in close proximity. Based on this usage logic, this implementation introduces a unified exit condition for anti-mistouch control at the call state level. When processing unit 3 detects that the call has ended, such as when the call is hung up or abnormally interrupted, processing unit 3 triggers the overall exit process of the anti-mistouch control mode.

[0072] In this exit process, processing unit 3 sends a release control command to touch control unit 4, restoring all display areas of the touchscreen to their default touch response state. Simultaneously, processing unit 3 sends a release control command to button control unit 5, restoring the volume buttons, power button, and other physical buttons to their normal input mode. This control process does not rely on changes in proximity detection results, but rather uses the end of the call as a unified trigger condition, thus ensuring that the anti-mistouch strategy does not persist across call scenarios.

[0073] By explicitly binding the anti-accidental touch control mode to the call status, the lifecycle of this control mode can be clearly defined and its boundaries well-defined. This avoids accidental triggering of the control in non-call scenarios and prevents it from remaining effective after the call ends. This implementation method makes the anti-accidental touch control strategy well manageable and maintainable at the system level, which is conducive to stable deployment across different terminal models and system versions.

[0074] In one specific embodiment, this invention also provides a call accidental touch prevention control method based on dual infrared collaboration. This method is executed when the mobile terminal is in a call state, and is used to reduce the risk of accidental touch operations when the terminal is used close to the user's face. Please refer to [link to relevant documentation]. Figure 5 Specifically, it includes the following steps: S1. When the mobile terminal enters the call state, the distance information of the first infrared sensor 1 and the second infrared sensor 2 are collected respectively.

[0075] During the call, the first infrared sensor 1 and the second infrared sensor 2 in the terminal operate simultaneously, detecting the distance between different positions of the terminal and external objects, and sending the corresponding distance detection information to the processing unit 3. The two infrared sensors are installed in different positions on the terminal, and their detection areas are independent of each other. This allows the acquired distance detection information to reflect the proximity of objects around the terminal from different spatial locations, thus providing a multi-source data basis for accurate determination of the proximity status.

[0076] S2. Based on two independent distance detection results, a collaborative determination is made to generate a close or distant state.

[0077] Processing unit 3 compares the distance detection information from the first infrared sensor 1 and the second infrared sensor 2 with the corresponding preset proximity thresholds. When the detection results of both infrared sensors meet the proximity condition, the terminal is determined to be in a proximity state; when the detection result of at least one infrared sensor does not meet the proximity condition, the terminal is determined to be in a non-proximity state. This dual-infrared collaborative determination method effectively avoids misjudgments caused by abnormal detection from a single sensor, thereby improving the reliability of proximity state recognition.

[0078] S3. When the terminal is in close proximity, implement touch restrictions on the preset area of ​​the touch screen and perform differentiated control on physical button input.

[0079] When the processing unit 3 determines that the terminal is in a close proximity state, it controls the touch control unit 4 to implement touch signal shielding on the lower half of the touch screen display area, so that touch input generated in this area does not trigger the corresponding operation response; at the same time, the processing unit 3 controls the button control unit 5 to perform differentiated processing on physical button input, which retains the input response function of the volume button and shields or ignores the input signal of the power button, so as to avoid abnormal operation caused by accidental touch of physical buttons during the call.

[0080] S4. When the terminal is no longer in a close-up state or the call ends, release touch restrictions and button controls.

[0081] When the processing unit 3 detects that the terminal has switched from a close-up state to a non-close-up state, or when it detects that the call has ended, it controls the touch control unit 4 to release the touch restriction on the preset area of ​​the touch screen, so that the touch screen can resume normal touch response; at the same time, it controls the button control unit 5 to release the differentiated control on the physical buttons, so that each physical button can be restored to its default function state, thereby completing the exit of the call anti-mistouch control method.

[0082] In summary, this invention addresses the issue of accidental touches during close-range use of terminals in call scenarios, providing a systematic design encompassing proximity state recognition, anti-accidental touch control strategies, and control exit mechanisms. By introducing dual infrared sensors to collaboratively determine proximity states, the accuracy and stability of proximity recognition are effectively improved. Furthermore, touch restrictions are implemented only in specific areas of the touchscreen, and physical button inputs are differentiated, ensuring that anti-accidental touch measures precisely target areas prone to misoperation without affecting necessary interactive operations during calls. Simultaneously, unified management of proximity state changes and call termination provides clear trigger conditions and exit boundaries for anti-accidental touch control, avoiding inconvenience caused by residual control strategies. The overall solution has a clear structure and coherent logic, enabling direct implementation under existing terminal hardware conditions while also considering actual user habits, achieving a good balance between anti-accidental touch effectiveness and interactive experience, demonstrating high engineering practicality and promotional value.

[0083] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A call mis-touch prevention control device based on dual infrared collaboration, characterized in that, include: The first infrared sensor and the second infrared sensor are located on both sides of the earpiece area of ​​the mobile terminal. They are used to collect distance information between the mobile terminal and external objects during a call. The processing unit is used to collaboratively determine the distance information collected by the first infrared sensor and the second infrared sensor. When the distance information collected by the first infrared sensor and the second infrared sensor both meet the proximity determination conditions, a proximity state determination result is generated. A touch control unit is used to shield touch signals from a preset area of ​​the touch screen in the proximity state. A button control unit is used to selectively control the physical button input of the mobile terminal according to the proximity state during the call. The collaborative determination is triggered based on at least two independent distance detection results jointly satisfying a preset condition.

2. The call mis-touch prevention control device according to claim 1, characterized in that, The first infrared sensor and the second infrared sensor are respectively disposed on the left and right sides of the earpiece, with a distance of 3 to 5 mm between them, and are disposed at an inclined angle relative to the plane of the earpiece.

3. The call mis-touch prevention control device according to claim 1, characterized in that, The collaborative determination includes: when the distance information collected by the first infrared sensor is less than the first distance threshold, and the distance information collected by the second infrared sensor is less than the first distance threshold, it is determined to be a close proximity state.

4. The call mis-touch prevention control device according to claim 3, characterized in that, A state maintenance interval is set between the first distance threshold and the second distance threshold. When the distance information falls into the state maintenance interval, the previous judgment state remains unchanged.

5. The call mis-touch prevention control device according to claim 1, characterized in that, The touch control unit is used to shield touch signals only from a portion of the display area of ​​the touch screen in the proximity state.

6. The call mis-touch prevention control device according to claim 5, characterized in that, The touch control unit is used to shield touch signals in the lower half of the display area, which is divided along the longitudinal direction of the touch screen, when the device is in close proximity.

7. The call mis-touch prevention control device according to claim 1, characterized in that, The button control unit is used to intercept the input signals of the volume and power buttons while maintaining the hang-up button function during a call and when the device is close to the caller.

8. The call mis-touch prevention control device according to claim 1, characterized in that, The processing unit is also used to control the touch control unit and the button control unit to return to the normal input state when the terminal is detected to switch from a close-up state to a non-close-up state.

9. The call mis-touch prevention control device according to claim 1, characterized in that, The processing unit is also used to control the touch control unit and the button control unit to exit the anti-mistouch control mode when the call ends.

10. A call mis-touch prevention control method based on dual infrared collaboration, characterized in that, include: When the mobile terminal enters a call state, distance information from the first infrared sensor and the second infrared sensor is collected respectively; Based on two independent distance detection results, a collaborative determination is made to generate a close or far state. When the terminal is in close proximity, touch restrictions are imposed on a preset area of ​​the touchscreen, and physical button input is controlled differently. Remove touch restrictions and button controls when the device is no longer in a close-up state or when the call ends.

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