Abstract: A method includes following steps. First transistors are formed over a substrate. An interconnect structure is formed over the plurality of first transistors. A dielectric layer is formed over the interconnect structure. 2D semiconductor seeds are formed over the dielectric layer. The 2D semiconductor seeds are annealed. An epitaxy process is performed to laterally grow a plurality of 2D semiconductor films respectively from the plurality of 2D semiconductor seeds. Second transistors are formed on the plurality of 2D semiconductor films.

Abstract: A recombinant vector, transgenic fish egg using the same and biomaterial using the same are applied to provide a transgenic fish that secreting recombinant human procollagens or collagens, and further to provide the biomaterial having the recombinant human procollagens or collagens and extract the recombinant human procollagens or collagens from the part(s), having the recombinant human procollagens or collagens, of the transgenic fish.

Abstract: A height adjustment apparatus for a projector includes a lifting assembly, a pushing rod, and an operation member. The projector includes a bottom wall having a recessed portion extending towards the inner side of the projector. The lifting assembly is received in the recessed portion, and includes a housing secured to the recessed portion, a supporting member, a first engaging member, and a second engaging member. The supporting member has one end pivotably connected to the housing the other end capable of being rotated out of the recessed portion. The first engaging member is connected to the supporting member and includes a first toothed engaging surface. The second engaging member includes a second toothed engaging surface, and is slidable in the housing. The pushing rod and the operation member control the engagement between the first and second toothed engaging surfaces to allow the supporting member to rotate or not.

Abstract: A height adjustment apparatus for a projector includes a lifting assembly, a pushing rod, and an operation member. The projector includes a bottom wall having a recessed portion extending towards the inner side of the projector. The lifting assembly is received in the recessed portion, and includes a housing secured to the recessed portion, a supporting member, a first engaging member, and a second engaging member. The supporting member has one end pivotably connected to the housing the other end capable of being rotated out of the recessed portion. The first engaging member is connected to the supporting member and includes a first toothed engaging surface. The second engaging member includes a second toothed engaging surface, and is slidable in the housing. The pushing rod and the operation member control the engagement between the first and second toothed engaging surfaces to allow the supporting member to rotate or not.

Abstract: A projector has a disassembling lock for preventing the lamp cover from being disassembled when the projector is secured to a ceiling. The disassembling lock includes a sleeve, a latching rod, a stop block, and a coil spring. The sleeve is secured in the projector and has a first sleeve portion and a second sleeve portion. The latching rod has a first rod portion, a second rod portion, and a flange formed between the first rod portion and the second rod portion, the flange is slidable inside the first sleeve portion. The stop block is fixed in a distal end of the first sleeve portion away from the second sleeve portion, the stop block defines a hole for the first rod portion sliding to the lamp cover. The coil spring is coiled around the first rod portion and held between the flange and the stop block.

Abstract: A locking structure of a housing for a portable electronic device is disclosed. The housing defines an opening therein. The locking structure includes an engagement-receiving member, a bended rod, and a securing member. The engagement-receiving member is fixed to the housing so as to partially seal the opening but leave a rod entrance between the engagement-receiving member and the housing. The engagement-receiving member defines two rod-bearing portion at the rod entrance. The bended rod includes two distal shaft portions and a mesial swinging portion. The two distal shaft portions are borne by the rod-bearing portions respectively. The swinging potion is received in the opening and is capable of swinging out from the opening. The securing member is shaped so as to tightly fit into the entrance, thereby securing the bended rod to the engagement-receiving member.

Abstract: A height adjusting apparatus, for adjusting the height of a projector, includes a support leg, an air-pressure cylinder connected to the projector, and a switch. The air-pressure cylinder and the support leg together form a sealed chamber. When the pressure of the air inside the chamber is regulated, the height of the air-pressure cylinder and the height of the projector change. The switch is mounted on the air-pressure cylinder to create a gap to allow air to exit or enter the chamber when the switch is open.

Abstract: A lens apparatus includes a barrel and a focus member mounted on the barrel. The barrel includes a fixing body and an engaging unit disposed at an outside wall of the fixing body. The focus member includes a retaining body contacted with the outside wall of the fixing body and a retaining unit disposed at an inside wall of the retaining body. The retaining unit and the engaging unit fasten each other for mounting the focus member on the barrel. When a force is applied on the focus member, the focus member drives the barrel to rotate by a friction generated between the retaining unit and the engaging unit.

Abstract: A handheld projector includes a housing, a projection lens module defining an optical axis, and an adjusting member movably mounted inside the housing. The projection lens module includes a sleeve, an outer barrel fixing the sleeve therein, an inner barrel received in the outer barrel, and a projection lens received in the inner barrel. The sleeve includes a first sidewall defining a guide groove angled relative to the optical axis. The outer barrel includes a second sidewall defining at least one cam groove angled relative to the optical axis. The projection lens includes at least one cam follower corresponding to the cam groove. The adjusting member includes a first surface facing the projection lens module. A guide post extends from the first surface corresponding to the guide groove. Each cam follower is plugged into the corresponding cam groove. The guide post is plugged into the guide groove.

Abstract: A handheld projector includes a housing, a projection lens module having an optical axis and a focusing member fixed inside the housing. The projection lens module includes an inner barrel fixed inside the housing, an outer barrel sleeving the inner barrel, and a projection lens received in the inner barrel. The outer barrel includes a first sidewall. At least one cam groove is defined in the first sidewall. A guide bar extends from the first sidewall. The projection lens includes cam follower corresponding to the cam groove. The focusing member includes a body portion with a first surface facing the projection lens module. A guide groove is defined on the first surface corresponding to the guide bar. The guide groove is tilted relative to the optical axis. Each cam follower is plugged into the corresponding cam groove. The guide bar is plugged into the guide groove.

Abstract: A locking structure of a housing for a portable electronic device is disclosed. The housing defines an opening therein. The locking structure includes an engagement-receiving member, a bended rod, and a securing member. The engagement-receiving member is fixed to the housing so as to partially seal the opening but leave a rod entrance between the engagement-receiving member and the housing. The engagement-receiving member defines two rod-bearing portion at the rod entrance. The bended rod includes two distal shaft portions and a mesial swinging portion. The two distal shaft portions are borne by the rod-bearing portions respectively. The swinging potion is received in the opening and is capable of swinging out from the opening. The securing member is shaped so as to tightly fit into the entrance, thereby securing the bended rod to the engagement-receiving member.

Abstract: A height adjusting apparatus, for adjusting the height of a projector, includes a support leg, an air-pressure cylinder connected to the projector, and a switch. The air-pressure cylinder and the support leg together form a sealed chamber. When the pressure of the air inside the chamber is regulated, the height of the air-pressure cylinder and the height of the projector change. The switch is mounted on the air-pressure cylinder to create a gap to allow air to exit or enter the chamber when the switch is open.

Abstract: A fixture includes a plate and a female screw. The plate includes a flat base portion, and two spaced restraining portions. Each restraining portion includes an elastic finger extending from the flat base portion, and a retaining tab inwardly extending from the elastic finger at a position distant from the flat base portion. The female screw is biased to the flat base portion by the retaining tabs, and defines two grooves therein. The elastic fingers are resiliently expandable outward when the female screw is forcibly inserted therebetween, and are received in the grooves respectively when the female screw is in position.

Abstract: A projector has a disassembling lock for preventing the lamp cover from being disassembled when the projector is secured to a ceiling. The disassembling lock includes a sleeve, a latching rod, a stop block, and a coil spring. The sleeve is secured in the projector and has a first sleeve portion and a second sleeve portion. The latching rod has a first rod portion, a second rod portion, and a flange formed between the first rod portion and the second rod portion, the flange is slidable inside the first sleeve portion. The stop block is fixed in a distal end of the first sleeve portion away from the second sleeve portion, the stop block defines a hole for the first rod portion sliding to the lamp cover. The coil spring is coiled around the first rod portion and held between the flange and the stop block.

Abstract: A lens apparatus includes a barrel and a focus member mounted on the barrel. The barrel includes a fixing body and an engaging unit disposed at an outside wall of the fixing body. The focus member includes a retaining body contacted with the outside wall of the fixing body and a retaining unit disposed at an inside wall of the retaining body. The retaining unit and the engaging unit fasten each other for mounting the focus member on the barrel. When a force is applied on the focus member, the focus member drives the barrel to rotate by a friction generated between the retaining unit and the engaging unit.

Abstract: A projector includes a main body, a light source module, a protective cap, and a protective receptacle. The main body includes a portion with the light source module installed therein. The protective cap alternatively covers the portion of the main body during normal use. The protective receptacle alternatively covers the portion of the main body during replacement of the light source module and is capable of accommodating the light source module therein.

Abstract: An exemplary color wheel includes a motor, a color filter and a heat sink. The motor includes a main body, a rotary housing fixed to an end of the main body and a spindle extending outwardly from the rotary housing. The color filter is sleeved around the spindle of the motor. The heat sink is circumferentially positioned to the motor.