US 12,332,515 B2
Light modulation module having temperature adjustment module and reflective projection device having the same
Heng Li, Hsin-Chu (TW); Kuang-Hsiang Chang, Hsin-Chu (TW); Pei-Cheng Liao, Hsin-Chu (TW); and Jen-Yu Shie, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Sep. 23, 2021, as Appl. No. 17/482,419.
Claims priority of application No. 202011055505.X (CN), filed on Sep. 30, 2020.
Prior Publication US 2022/0100024 A1, Mar. 31, 2022
Int. Cl. G02F 1/1333 (2006.01); G03B 21/00 (2006.01); G03B 21/16 (2006.01)
CPC G02F 1/133382 (2013.01) [G03B 21/006 (2013.01); G03B 21/16 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light modulation module, comprising a liquid crystal on silicon (LCoS) display panel and a temperature adjustment module, wherein:
the LCOS display panel is disposed on a transmission path of an illumination beam, and the LCOS display panel is configured to modulate the illumination beam into an image beam and reflect the image beam; and
the temperature adjustment module comprises a temperature sensing element and a temperature control element, and the temperature control element is coupled to the LCOS display panel, wherein:
the temperature sensing element and the LCOS display panel are separately disposed;
the temperature sensing element is disposed adjacent to the LCOS display panel and is configured to sense an ambient temperature near the LCOS display panel, and a power source of the LCOS display panel is different from a power source of the temperature adjustment module;
the temperature control element is disposed next to the LCOS display panel and is coupled to the temperature sensing element, and a temperature of the LCOS display panel is controlled to fall within a preset temperature interval by the temperature control element according to the sensed ambient temperature, and the temperature adjustment module is configured to compare the sensed ambient temperature with the preset temperature interval to generate a comparison result, wherein
the temperature control element is configured to cool the LCOS display panel until the temperature of the LCOS display panel falls within the preset temperature interval in response to the comparison result being that the sensed ambient temperature is higher than a temperature upper limit of the preset temperature interval;
the temperature control element is configured to heats the LCOS display panel until the temperature of the LCOS display panel falls within the preset temperature interval in response to the comparison result being that the sensed ambient temperature is lower than a temperature lower limit of the preset temperature interval; and
the temperature control element is configured not to cool or heat the LCOS display panel in response to the comparison result being that the sensed ambient temperature falls within the preset temperature interval.