Distance detection method, distance detection device and electronic equipment
A technology of distance detection and distance, which is applied in the field of sensors, can solve problems such as distance not meeting requirements, time-consuming, and meeting requirements, and achieve the effect of saving time and cost
Pending Publication Date: 2021-10-19
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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Problems solved by technology
[0003] Since the display panel has a certain impact on the performance of the optical fingerprint sensor to identify fingerprints, in order to ensure the performance, there is a certain requirement for the distance between the optical fingerprint sensor and the lower surface of the display panel, otherwise it will easily lead to the problem that the image recognized by the optical fingerprint sensor is not clear.
[0004] However, due to manufacturing process issues, the distance between the optical fingerprint sensor and the lower surface of the display panel cannot be strictly guaranteed to meet the requirements in the process of manufacturing the terminal. Instead, it is necessary to test the performance of the optical fingerprint sensor after the terminal is manufactured. Only then can it be determined whether the recognition result of the optical fingerprint sensor meets the requirements
[0005] However, the factors that cause the recognition result of the optical fingerprint sensor to fail to meet the requirements are not limited to the distance between the optical fingerprint sensor and the lower surface of the display panel not meeting the requirements, it may also be the quality problem of the optical fingerprint sensor itself, the transmittance of the display panel There are problems, etc.
[0006] Therefore, even if the recognition result of the optical fingerprint sensor does not meet the requirements, it cannot be directly determined that the distance between the optical fingerprint sensor and the lower surface of the display panel does not meet the requirements. It is necessary to disassemble the terminal for testing to determine the distance between the optical fingerprint sensor and the display panel. Whether the distance between the lower surfaces of the panels does not meet the requirements, this detection method is costly and time consuming
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[0049] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0050] figure 1 It is a schematic flowchart of a distance detection method shown according to an embodiment of the present disclosure. The distance detection method shown in this embodiment can be applied to terminals, and the terminals include but are not limited to electronic devices such as mobile phones, tablet computers, and wearable devices.
[0051] The terminal includes a dis...
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The invention relates to a distance detection method and device and electronic equipment. The method comprises the steps: recording a first moment when an optical fingerprint sensor receives light rays reflected by the lower surface of a display panel and a second moment when a light source emits the light rays; calculating the duration of the light propagating from the light source to the optical fingerprint sensor according to the first moment and the second moment; calculating the distance from the lower surface of the display panel to the optical fingerprint sensor according to the duration and the propagation speed of the light; and generating prompt information according to the distance. According to the embodiment, the light source is arranged below the display panel, the distance from the lower surface of the display panel to the optical fingerprint sensor is calculated according to the duration that the light emitted by the light source propagates from the light source to the optical fingerprint sensor and the propagation speed of the light, and then the prompt information is generated according to the distance. According to the technical scheme, a detector can quickly and accurately determine whether the distance from the lower surface of the display panel to the optical fingerprint sensor meets the requirement or not without disassembling the terminal, so that the cost is saved, and the time is saved.
Description
technical field [0001] The present disclosure relates to the technical field of sensors, and in particular to a distance detection method, a distance detection device and electronic equipment. Background technique [0002] In order to increase the screen-to-body ratio of the display panel in electronic devices such as terminals, in the related art, a fingerprint sensor is arranged under the display panel, and the light reflected by the fingerprint is collected in the form of an optical fingerprint sensor to identify the fingerprint pattern. [0003] Since the display panel has a certain influence on the performance of the optical fingerprint sensor to identify fingerprints, in order to ensure the performance, there is a certain requirement for the distance between the optical fingerprint sensor and the lower surface of the display panel, otherwise it will easily lead to the problem that the image recognized by the optical fingerprint sensor is not clear . [0004] However, ...
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Login to View More IPC IPC(8): G06K9/00G06F3/042
CPCG06F3/042
Inventor 郭延顺范连涛
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD