Abstract: A display device is provided. The display device has an upper case, a lower case, at least one fastening unit and at least one adjustable module. The upper case and the lower case respectively have at least one first fasten hole and at least one second fasten hole. The second fasten hole coaxially communicates with the first fasten hole. Through the second fasten hole, the unit is fixed in the first fasten hole to fasten the upper case and the lower case together. The adjustable module has an adjustable unit with a through hole penetrating therethrough. Furthermore, the adjustable unit is partially disposed in the second fasten hole. By disposing the adjustable unit and the fastening unit within the second fasten hole, the display device could be made more compact and the overall cost can be decreased.

Abstract: A case structure includes a covering member and a lid member. The covering member includes a main boy, a first coupling part and a first positioning part. The lid member includes a lid plate, a second coupling part and a second positioning part. The second coupling part of the lid member and the first coupling part of the covering member are engaged with each other so that the lid plate is coupled with the main body and pivotal with respect to the main body. When the lid plate is rotated to a first position, the second positioning part is interference-fitted into the first positioning part so that the lid plate is positioned with respect to the main body.

Abstract: An optical device includes a lens module, a case structure and an optical adjusting mechanism. The optical adjusting mechanism includes a first adjusting member, a second adjusting member and an elastic element. The first adjusting member includes a first interference transmission structure. The second adjusting member is movably connected with the case structure, and includes a second interference transmission structure. In response to the movement of the lens module, the elastic element elastically urges against the second adjusting member so that the second adjusting member is movable within a predetermined distance range, and the second interference transmission structure presses against and engages with the first interference transmission structure. Once the second adjusting member is moved, the first adjusting member is synchronously moved so that optical parameters of the lens module are adjusted through the first adjusting member.

Abstract: A display device is provided. The display device has an upper case, a lower case, at least one fastening unit and at least one adjustable module. The upper case and the lower case respectively have at least one first fasten hole and at least one second fasten hole. The second fasten hole coaxially communicates with the first fasten hole. Through the second fasten hole, the unit is fixed in the first fasten hole to fasten the upper case and the lower case together. The adjustable module has an adjustable unit with a through hole penetrating therethrough. Furthermore, the adjustable unit is partially disposed in the second fasten hole. By disposing the adjustable unit and the fastening unit within the second fasten hole, the display device could be made more compact and the overall cost can be decreased.

Abstract: The invention is a magnetic fix structure that applies on a projection device. The magnetic fix structure includes a first magnetic connector set and a second magnetic connector set, and the projection device includes a projection module housing and a power module housing. The first magnetic connector set and the second magnetic connector set are disposed on the projection module housing and the power module housing respectively. Therefore, through the attraction between the first magnetic connector set and the second magnetic connector set, the power module housing can be fixed onto the projection module housing.

Abstract: The invention is a magnetic fix structure that applies on a projection device. The magnetic fix structure includes a first magnetic connector set and a second magnetic connector set, and the projection device includes a projection module housing and a power module housing. The first magnetic connector set and the second magnetic connector set are disposed on the projection module housing and the power module housing respectively. Therefore, through the attraction between the first magnetic connector set and the second magnetic connector set, the power module housing can be fixed onto the projection module housing.

Abstract: An optical device includes a lens module, a case structure and an optical adjusting mechanism. The optical adjusting mechanism includes a first adjusting member, a second adjusting member and an elastic element. The first adjusting member includes a first interference transmission structure. The second adjusting member is movably connected with the case structure, and includes a second interference transmission structure. In response to the movement of the lens module, the elastic element elastically urges against the second adjusting member so that the second adjusting member is movable within a predetermined distance range, and the second interference transmission structure presses against and engages with the first interference transmission structure. Once the second adjusting member is moved, the first adjusting member is synchronously moved so that optical parameters of the lens module are adjusted through the first adjusting member.

Abstract: A case structure includes a covering member and a lid member. The covering member includes a main boy, a first coupling part and a first positioning part. The lid member includes a lid plate, a second coupling part and a second positioning part. The second coupling part of the lid member and the first coupling part of the covering member are engaged with each other so that the lid plate is coupled with the main body and pivotal with respect to the main body. When the lid plate is rotated to a first position, the second positioning part is interference-fitted into the first positioning part so that the lid plate is positioned with respect to the main body.

Abstract: An entertainment system and a detachable display apparatus thereof are provided. Since the detachable display apparatus may be freely engaged and disengaged with a specific member in the entertainment system, the entertainment system may achieve more purposes and video/audio data stored in the entertainment system may be updated, accessed and played at a remote area.