JP-7857010-B2 - Detection device

Inventors

• 柿木 雄飛

Assignees

• 株式会社ジャパンディスプレイ

Dates

Publication Date

20260512

Application Date

20220519

Claims (5)

1. A sensor unit having a detection area in which multiple electrodes are arranged, A detection unit that detects a gesture corresponding to the movement of the object to be detected in the space on the detection area based on the detected values for each of the multiple electrodes, Equipped with, The detection unit is When the distance between the sensor unit and the object to be detected is less than or equal to a first distance, it is detected that a predetermined decision gesture has been performed. When the distance between the sensor unit and the object to be detected is less than or equal to a second distance greater than the first distance, and greater than the first distance, and the movement speed of the object to be detected in the space within the detection area is less than or equal to a predetermined value, it is detected that the decision gesture has been performed . The detection unit is A coordinate calculation unit calculates the spatial coordinates of the object to be detected in the space on the detection area based on the detection values for each of the multiple electrodes, A gesture determination processing unit that determines whether or not the determination gesture was performed based on the spatial coordinates, Equipped with, The aforementioned coordinate calculation unit, The first data shows the coordinate data in the X direction, A second set of data showing coordinate data in the Y direction that is orthogonal to the X direction, A third set of data shows coordinate data in the Z direction, which is orthogonal to the XY plane, Calculate, The third data increases as the distance between the sensor unit and the object being detected decreases. The gesture determination processing unit is: If the third data is equal to or greater than the first decision operation determination threshold corresponding to the first distance, it is determined that the decision gesture has been performed. The decision gesture is determined to have been performed if the third data is less than the first decision operation determination threshold, and is greater than or equal to the second decision operation determination threshold corresponding to the second distance, and furthermore, the amount of movement per unit time in the XY plane is less than or equal to the amount of movement threshold, and the magnitude of the amount of movement per unit time in the Z direction is less than or equal to the first amount of movement threshold. After determining that the decision gesture has been performed because the third data is less than or equal to the first decision operation determination threshold, the system transitions to a decision gesture determination waiting state when the third data falls below the first decision operation determination threshold minus a predetermined offset value. Detection device.
2. The gesture determination processing unit is: After determining that the decision gesture has been performed because the third data is less than or equal to the second decision operation determination threshold, the system transitions to the determination waiting state when the third data falls below the value obtained by subtracting the offset value from the maximum value within the range less than the first decision operation determination threshold. The detection device according to claim 1 .
3. The gesture determination processing unit is: After transitioning to the judgment waiting state, the value obtained by adding the offset value to the third data is set as the second decision operation judgment threshold. The detection device according to claim 2 .
4. The second decision operation determination threshold is limited to a minimum second decision operation determination threshold that is smaller than the first decision operation determination threshold. The gesture determination processing unit is: After transitioning to the judgment waiting state, if the third data becomes less than the value obtained by subtracting the offset value from the second decision operation judgment threshold, and the value obtained by adding the offset value to the third data becomes less than the minimum value of the second decision operation judgment threshold, the second decision operation judgment threshold is restricted to the minimum value of the second decision operation judgment threshold. The detection device according to claim 3 .
5. The gesture determination processing unit is: The decision gesture is determined to have been performed if the third data is less than the first decision operation determination threshold and greater than or equal to the second decision operation determination threshold, and furthermore, the amount of movement per unit time in the Z direction is a negative value and the magnitude of the amount of movement per unit time in the Z direction is greater than or equal to the second movement threshold. A detection device according to any one of claims 1 to 4 .

Description

This invention relates to a detection device. In recent years, detection systems have become known in which a detection device capable of detecting nearby external objects, known as a touch panel, is mounted or integrated onto a display device such as a liquid crystal display (see, for example, Patent Documents 1 to 3). In such detection systems, in addition to a touch detection function that detects contact between the detected object, such as an operator's fingers, and the detection surface, a so-called hover detection function that detects the proximity of fingers in the space above the detection area, as well as finger movements such as gestures, even when the fingers are not touching the detection surface, has attracted attention. U.S. Patent Application Publication No. 2014/0049486U.S. Patent Application Publication No. 2013/0342498U.S. Patent Application Publication No. 2014/0049508 Figure 1 is a plan view showing a schematic configuration of the detection device according to the embodiment.Figure 2 is a schematic diagram showing the general cross-sectional configuration of a detection system to which the detection device according to this embodiment is applied.Figure 3 is a block diagram showing an example of the configuration of the detection unit of the detection device according to the embodiment.Figure 4A is a schematic diagram showing the positional relationship between the object to be detected in the space within the detection area and each electrode.Figure 4B is a schematic diagram showing the spatial coordinates of the detected object in the space within the detection area.Figure 5 is a conceptual diagram illustrating an example of a method for extracting the spatial coordinates of a detected object.Figure 6A is a schematic diagram illustrating the relationship between the distance between the sensor unit and the object to be detected and the determination operation.Figure 6B is a schematic diagram illustrating the relationship between the distance between the sensor unit and the object to be detected and the determination operation.Figure 6C is a schematic diagram illustrating the relationship between the distance between the sensor unit and the object to be detected and the determination operation.Figure 7 is a flowchart showing an example of gesture determination processing in a detection device according to an embodiment.Figure 8 is a subflowchart showing an example of the decision operation judgment threshold update process shown in Figure 7.Figure 9 is a subflowchart showing an example of the spatial coordinate movement velocity calculation process shown in Figure 7.Figure 10 is a subflowchart showing an example of the decision operation judgment process shown in Figure 7.Figure 11 is a subflowchart showing an example of the decision operation waiting transition determination threshold update process shown in Figure 7.Figure 12 is a conceptual diagram showing various thresholds in the gesture detection process.Figure 13 is a timing chart showing an example of a specific operation using the gesture detection processing flow shown in Figure 7. The embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments described below. Furthermore, the components described below include those that are easily conceivable to those skilled in the art, and those that are substantially the same. Moreover, the components described below can be combined as appropriate. Furthermore, the disclosure is merely an example, and any modifications that can be easily conceived by those skilled in the art while maintaining the spirit of the invention are naturally included within the scope of the present invention. Also, in order to clarify the explanation, the drawings may schematically represent the width, thickness, shape, etc., of each part compared to the actual embodiment, but these are merely examples and do not limit the interpretation of the present invention. Furthermore, in this specification and each drawing, elements similar to those described above in previously shown drawings are denoted by the same reference numerals, and detailed explanations may be omitted as appropriate. Figure 1 is a plan view showing the schematic configuration of a detection device according to an embodiment. As shown in Figure 1, the detection device 1 comprises a sensor unit 10 and a detection unit 20. The sensor unit 10 includes a sensor substrate 11, a plurality of electrodes 12 provided in the detection area AA of the sensor substrate 11, and wiring 13 extending from each of the plurality of electrodes 12. The detection unit 20 includes a control board 21, a detection circuit 22, a processing circuit 23, a power supply circuit 24, and an interface circuit 25. The detection region AA of the sensor substrate 11 is a region where multiple electrodes 12 are arranged in a matrix in the Dx direction (first directio