US 11,989,015 B2
Method and device for detecting open and closed states of platen cover plate of image reading apparatus
Weixin Wu, Guangdong (CN)
Assigned to ZHUHAI PANTUM ELECTRONICS CO., LTD., Guangdong (CN)
Filed by ZHUHAI PANTUM ELECTRONICS CO., LTD., Guangdong (CN)
Filed on Aug. 31, 2022, as Appl. No. 17/899,870.
Claims priority of application No. 202111019762.2 (CN), filed on Sep. 1, 2021.
Prior Publication US 2023/0069903 A1, Mar. 9, 2023
Int. Cl. G05B 23/02 (2006.01); H04N 23/51 (2023.01)
CPC G05B 23/0259 (2013.01) [H04N 23/51 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method for detecting open and closed states of a platen cover plate of an image reading apparatus, comprising:
controlling a scanning element to scan light at an edge of a platen to obtain a signal value representing a light intensity;
determining whether an absolute difference value between the signal value and a preset standard value is greater than a preset tolerance value;
sending a prompt signal to prompt a user to close the platen cover plate in response to the absolute difference value being greater than the preset tolerance value; and
continuing to perform scanning work on a manuscript on the platen in response to the absolute difference value being not greater than the preset tolerance value.