1. In an apparatus for supporting a portion of a device for processing an electronic component substrate, the apparatus including an assembly supporting a laser lens in a gravity field for focusing movement with respect to the electronic component substrate along a Z-axis by a linear actuator, the improvement comprising:
a fluid counterbalance for the assembly defined by a fluid operated cylinder having a piston associated with a housing for movement between end limits of travel, the piston dividing the housing into first and second fluid chambers having first and second fluid communication ports respectively; and
a fluid pressure source connectable to the first and second chambers through the first and second fluid communication ports respectively, the fluid pressure source adjustable to statically suspend the supported laser lens in equilibrium within the gravity field, the fluid pressure source permitting movement of a mass of the supported laser lens to any position between opposite end limits of travel of the piston associated with the housing, while maintaining the mass of the supported laser lens in equilibrium.
2. The improvement of claim 1, wherein pressure within the first and second chambers of the fluid operated cylinder is adjustable so that the mass of the supported laser lens is statically suspended in equilibrium within the gravity field.
3. The improvement of claim 1, wherein varying pressure within the first and second chambers of the fluid operated cylinder can move the supported laser lens to any position within a range of travel of the piston within the housing, while maintaining a mass of the supported laser lens in equilibrium regardless of piston position within the housing.
4. The improvement of claim 1, wherein the fluid operated cylinder adjusts damping of the supported laser lens so that over-travel after force is applied is minimized.
5. The improvement of claim 1, wherein the fluid operated cylinder counterbalances a mass of the supported laser lens in the gravity field without lowering a natural frequency characteristic of the assembly.
6. The improvement of claim 1, wherein the fluid operated cylinder counterbalances a mass of the supported laser lens in the gravity field without adding significant mass.
7. The improvement of claim 1, wherein a damping characteristic of the assembly varies by changing an orifice size associated with at least one of the first and second fluid communication ports of the fluid operated cylinder.
8. The improvement of claim 1, wherein a spring rate characteristic of the assembly varies in response to a change of pressure in at least one of the first and second chambers of the housing.
9. The improvement of claim 1, wherein pressure is equalized on either side of the piston to obtain static equilibrium in the gravity field.
10. The improvement of claim 1 further comprising:
an adjustable orifice associated with each fluid communication port of the fluid operated cylinder for varying a damping characteristic of the assembly.
11. A method for supporting an assembly including a laser lens in a gravity field for focusing movement with respect to an electronic component substrate along a Z-axis by a linear actuator in an apparatus for processing the electronic component substrate, the method comprising:
providing a fluid counterbalance for the assembly defined by a fluid operated cylinder having a piston associated with a housing for reciprocal movement between end limits of travel, the piston dividing the cylinder into first and second chambers having first and second fluid communication ports respectively;
connecting a fluid pressure source to the first and second chambers through the first and second fluid communication ports respectively; and
adjusting the fluid pressure source to statically suspend the supported laser lens in equilibrium within a gravity field, the fluid pressure source permitting movement of a mass of the supported laser lens to any position between opposite end limits of travel of the piston associated with the housing, while maintaining the mass of the supported laser lens in equilibrium.
12. The method of claim 11, wherein adjusting the fluid pressure source in communication with the fluid operated cylinder statically suspends the mass of the supported laser lens in equilibrium within the gravity field.
13. The method of claim 11, wherein adjusting the fluid pressure source in communication with the fluid operated cylinder moves the supported laser lens to any position within a range of travel of the piston within the housing, while maintaining a mass of the supported laser lens in equilibrium regardless of piston position within the housing.
14. The method of claim 11, wherein adjusting the fluid pressure source in communication with the fluid operated cylinder adjusts damping of the supported laser lens so that over-travel after force is applied is minimized.
15. The method of claim 11, wherein adjusting the fluid pressure source in communication with the fluid operated cylinder counterbalances a mass of the supported laser lens in the gravity field without lowering a natural frequency characteristic of the assembly.
16. The method of claim 1, wherein adjusting the fluid pressure source in communication with the fluid operated cylinder counterbalances a mass of the supported laser lens in the gravity field without adding significant mass.
17. The method of claim 11 further comprising:
varying a damping characteristic of the assembly by changing an orifice size associated with at least one of the first and second fluid communication ports of the fluid operated cylinder.
18. The method of claim 11 further comprising:
varying a spring rate characteristic of the assembly in response to a change of pressure in at least one of the first and second chambers of the housing.
19. The method of claim 11 further comprising:
equalizing pressure on either side of the piston to obtain static equilibrium of the supported laser lens in the gravity field.
20. The method of claim 11 further comprising:
adjusting an orifice associated with each fluid communication port of the fluid operated cylinder for varying a damping characteristic of the assembly.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for providing a video telephony service in a mobile communication terminal, the method comprising:
receiving preferred video format information from a peer mobile communication terminal during a signaling procedure with the peer mobile communication terminal;
determining a video format to use in the video telephony service using the received preferred video format; and
transmitting and receiving video data with the peer mobile communication terminal using the determined video format.
2. The method of claim 1, further comprising:
completing a call access with the peer communication terminal;
receiving identifier information from the peer communication terminal; and
determining whether information for supporting multiple video formats exists in the identifier information,
wherein the step of receiving the preferred video format information from the peer communication terminal is performed when it is determined that information of whether multiple video formats are supported in the identifier information exists.
3. The method of claim 2, wherein the identifier information includes at least one of a product number, a version number, a screen resolution and information of whether multiple video formats are supported in the peer mobile communication terminal.
4. The method of claim 2, further comprising determining a master terminal and a slave terminal by exchanging a MasterSlave Determination message with the peer mobile communication terminal.
5. The method of claim 2, further comprising exchanging a multiplex table with the peer mobile communication terminal.
6. The method of claim 2, further comprising, when it is determined that information of whether multiple video formats are supported in the identifier information does not exist:
determining a master terminal and a slave terminal by exchanging a MasterSlave Determination message with the peer mobile communication terminal;
receiving capability information from the peer communication terminal;
exchanging a multiplex table with the peer mobile communication terminal; and
generating a logical channel for transmitting audio data and video data with the peer communication terminal.
7. The method of claim 1, further comprising:
after determining the video format to use in the video telephony service, receiving capability information from the peer communication terminal; and
generating a logical channel for transmitting audio data and video data with the peer communication terminal.
8. The method of claim 1, further comprising determining a moving level for a mutual negotiation with the peer mobile communication terminal.
9. An apparatus for providing a video telephony service in a mobile communication terminal, the apparatus comprising:
a controlling unit for receiving preferred video format information from a peer mobile communication terminal during a signaling procedure with the peer mobile communication terminal and for determining a video format to use in the video telephony service using the received preferred video format; and,
a video codec for encoding and decoding video data that is transmitted to and received from the peer mobile communication terminal, using the determined video format.
10. The apparatus of claim 9, wherein the controlling unit, after completing a call access with the peer communication terminal, receives identifier information from the peer communication terminal, determines whether information for supporting multiple video formats exists in the identifier information and receives preferred video format information from the peer communication terminal when it is determined that information for supporting multiple video formats exists in the identifier information.
11. The apparatus of claim 10, wherein the identifier information includes at least one of a product number, a version number, a screen resolution and information of whether multiple video formats are supported in the peer mobile communication terminal.
12. The apparatus of claim 10, wherein the controlling unit determines a master terminal and a slave terminal by exchanging a MasterSlave Determination message with the peer mobile communication terminal.
13. The apparatus of claim 10, wherein the controlling unit exchanges a multiplex table with the peer mobile communication terminal.
14. The apparatus of claim 10, wherein the controlling unit, when it is determined that information of whether multiple video formats are supported in the identifier information does not exist:
determines a master terminal and a slave terminal by exchanging a MasterSlave Determination message with the peer mobile communication terminal;
receives capability information from the peer communication terminal;
exchanges a multiplex table with the peer mobile communication terminal; and
generates a logical channel for transmitting audio data and video data with the peer communication terminal.
15. The apparatus of claim 9, wherein the controlling unit, after determining a video format to use in the video telephony service, receives capability information from the peer communication terminal and generates a logical channel for transmitting audio and video data with the peer communication terminal.
16. The apparatus of claim 9 wherein the controlling unit determines a moving level for a mutual negotiation with the peer mobile communication terminal.