1. A buffer circuit, comprising:
a positive polarity buffer for receiving a first supply voltage and a second supply voltage to output a positive reference voltage to a positive resistance string, wherein the second supply voltage is less than the first supply voltage; and
a negative polarity buffer for receiving the second supply voltage and a third supply voltage to output a negative reference voltage to a negative resistance string, wherein the third supply voltage is less than the second supply voltage.
2. The buffer circuit according to claim 1, wherein the positive polarity buffer comprises:
a first power supply for receiving the first supply voltage;
a second power supply for receiving the second supply voltage; and
a first output supply coupled to the positive resistance string.
3. The buffer circuit according to claim 2, wherein the negative polarity buffer comprises:
a third power supply for receiving the second supply voltage;
a fourth power supply for receiving the third supply voltage; and
a second output supply coupled to the negative resistance string.
4. The buffer circuit according to claim 3, wherein the positive polarity buffer further comprises a positive input stage and a positive output stage; the positive input stage is coupled to the positive output stage; the first power supply and the second power supply are coupled to the positive output stage; the negative polarity buffer comprises a negative input stage and a negative output stage; the negative input stage is coupled to the negative output stage; the third power supply and the fourth power supply are coupled to the negative output stage.
5. The buffer circuit according to claim 4, wherein the positive output stage comprises a first output transistor and a second output transistor; the second output transistor is coupled to the first output transistor; the first power supply is coupled to a source of the first output transistor; the second power supply is coupled to a source of the second output transistor; the negative output stage comprises a third output transistor and a fourth output transistor; the fourth output transistor is coupled to the third output transistor; the third power supply is coupled to a source of the third output transistor; the fourth power supply is coupled to a source of the fourth output transistor.
6. The buffer circuit according to claim 3, wherein the positive polarity buffer further comprises a positive input stage and a positive output stage; the positive input stage is coupled to the positive output stage; the first power supply and the second power supply are coupled to the positive input stage; the negative polarity buffer comprises a negative input stage and a negative output stage; the negative input stage is coupled to the negative output stage; the third power supply and the fourth power supply are coupled to the negative input stage.
7. The buffer circuit according to claim 6, wherein the positive input stage comprises a first current source, a second current source, a first input resistor, a second input resistor, a third input resistor and a fourth input resistor; the first input resistor and the second input resistor are coupled to a first current source; the third input resistor and the fourth input resistor are coupled to a second current source; the second power supply is coupled to the first current source; the first power supply is coupled to the second current source; the negative input stage comprises a third current source, a fourth current source, a fifth input resistor, a sixth input resistor, a seventh input resistor and an eighth input resistor; the fifth input resistor and the sixth input resistor are coupled to a third current source; the seventh input resistor and the eighth input resistor are coupled to a fourth current source; the fourth power supply is coupled to the third current source; the third power supply is coupled to the fourth current source.
8. The buffer circuit according to claim 1, further comprising:
a first selection switch for outputting the second supply voltage or the third supply voltage to a positive polarity buffer; and
a second selection switch for outputting the second supply voltage or the first supply voltage to a negative polarity buffer.
9. The buffer circuit according to claim 1, wherein the positive resistance string, the negative resistance string, the positive polarity buffer and the negative polarity buffer are in-built in a source driver chip.
10. The buffer circuit according to claim 1, wherein the positive resistance string and the negative resistance string are in-built in a source driver chip; the positive polarity buffer and the negative polarity buffer are not in-built in the source driver chip.
11. The buffer circuit according to claim 1, further comprising:
a supply voltage output circuit for providing the second supply voltage.
12. The buffer circuit according to claim 11, wherein the supply voltage output circuit comprises a medium voltage buffer and a capacitor coupled to the medium voltage buffer.
13. The buffer circuit according to claim 11, wherein the supply voltage output circuit is a low drop out (LDO) linear voltage regulator.
14. The buffer circuit according to claim 11, wherein the supply voltage output circuit is a back converter.
15. A display module, comprising:
a panel;
a positive resistance string;
a negative resistance string;
a buffer circuit, comprising:
a positive polarity buffer for receiving a first supply voltage and a second supply voltage to output a positive reference voltage to a positive resistance string, wherein the second supply voltage is less than the first supply voltage; and
a negative polarity buffer for receiving the second supply voltage and a third supply voltage to output a negative reference voltage to a negative resistance string, wherein the third supply voltage is less than the second supply voltage; and
a driving circuit for driving the panel according to the positive reference voltage and the negative reference voltage.
16. A display driving method, comprising:
providing a first supply voltage and a second supply voltage to a positive polarity buffer which accordingly outputs a positive reference voltage, wherein the second supply voltage is less than the first supply voltage;
providing the second supply voltage and a third supply voltage to a negative polarity buffer which accordingly outputs a negative reference voltage, wherein the third supply voltage is less than the second supply voltage; and
driving a panel according to the positive reference voltage and the negative reference voltage.
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 slide assembly for a pistol having a frame and a trigger assembly of a first caliber comprising:
a barrel assembly with a firing chamber and a barrel defining an axis wherein the barrel assembly includes a lateral protrusion; and
a slide housing that is adapted to be positioned on the frame of the pistol for reciprocation between a forward battery position and a rearward loading position, such that the recoil of the pistol induces the slide housing to slide backwards along the frame;
wherein the slide housing defines a groove having a first section that extends in a direction parallel to the axis of the barrel; and
the groove having an upper surface and a lower surface parallel to each other and closely receiving the protrusion therebetween when the slide is in the forward position, the rearward position, and all intermediate positions therebetween.
2. The assembly of claim 1, wherein the protrusion comprises a boss.
3. The assembly of claim 1, wherein the slide housing has a forward portion that receives the barrel assembly and a rearward portion.
4. The assembly of claim 3, wherein the slide housing further includes a firing pin assembly that engages with the trigger assembly of the frame and wherein the firing pin assembly is located in the rearward portion of the slide housing.
5. The assembly of claim 4, wherein the groove has a horizontal portion and the horizontal portion of the groove is located within the forward portion of the slide.
6. The assembly of claim 5, wherein the slide housing defines an ejection port that is interposed between the forward and rear portions of the slide housing and wherein the horizontal portion of the groove is located adjacent to and forward of the ejection port.
7. The assembly of claim 1, including a vertical groove portion that extends downward from a rear end of the groove that permits the protrusion to be removed from a horizontal portion of the groove to thereby permit removal of the barrel assembly from the slide housing.
8. The assembly of claim 7, wherein the vertical portion of the groove is sized so that the
protrusion and the barrel assembly can be spaced from the firing pin assembly by
movement of the slide housing to permit the first protruding member to be removed from the
horizontal portion of the groove.
9. The assembly of claim 8, wherein the horizontal portion of the groove is approximately 2.43 inches long inches long and 0.13 inches wide and the vertical portion of the groove is approximately 0.033 inches wide.
10. The assembly of claim 1, further comprising a spring return mechanism that is detachably mounted between the slide housing and the barrel housing and wherein the spring return mechanism retains the barrel assembly in the slide housing such that removal of the spring return assembly permits removal of the protrusion from the groove and removal of the barrel assembly from the slide housing.
11. The assembly of claim 10, wherein the slide housing defines a first end where the barrel of the barrel assembly protrudes and a first seat that receives the spring return mechanism and the firing chamber housing defines a second seat that receives the spring return mechanism.
12. A pistol comprising:
a frame;
a slide connected to the flame the and operable to reciprocate between a forward battery position
and a rearward loading position;
the slide defining a central passage receiving an elongated barrel;
the barrel having a protrusion lateral to the length of the barrel; and
the slide defining a groove having a first section that extends in a direction parallel to the length of the barrel; and
the groove having an upper surface and a lower surface parallel to each other and closely receiving the protrusion when the slide is in the forward position, the rearward position, and all intermediate positions therebetween.
13. The pistol of claim 12 wherein the groove has opposed elongated upper and lower surfaces facing each other.
14. The pistol of claim 12 wherein the slide is operable to move to a disassembly position forward to the forward position, and wherein the groove has a downward segment operable for passing the protrusion when the slide is in the disassembly position.
15. The pistol of claim 14 wherein the downward segment is perpendicular to an adjacent portion of the groove.
16. The pistol of claim 12 wherein the protrusion extends horizontally from the barrel when the pistol is in a normal vertical shooting position.
17. The pistol of claim 12 wherein the barrel has a rear chamber portion including the protrusion.
18. The pistol of claim 12 wherein the slide includes a vertical sidewall when the pistol is in a normal vertical shooting position, the vertical sidewall defining the groove.