1. A key press detecting circuit for detecting a status of a plurality of keys through a single pin, the plurality of keys being connected in series or in parallel with a plurality of resistors to establish a key module connected to the single pin, the key press detecting circuit comprising:
a current source providing a first current and a second current related to the first current;
a constant voltage control circuit connected between the current source and the single pin, applying the first current to the single pin and adjusting the first current in order to maintain a voltage of the single pin at a first voltage; and
a current comparator connected to the current source, comparing the second current with a set of reference values to generate an output signal representative of the status of the plurality of keys.
2. The key press detecting circuit of claim 1, wherein the current source comprises a current mirror mirroring the first current to generate the second current.
3. The key press detecting circuit of claim 1, wherein the constant voltage control circuit comprises:
a transistor and a resistor connected in series between the current source and the single pin; and
an operational amplifier having a first input terminal receiving a reference voltage equal to the first voltage, a second input terminal connected to the single pin, and an output terminal providing an error signal applied to a gate of the transistor, thereby adjusting the first current.
4. The key press detecting circuit of claim 1, wherein the current comparator comprises:
a resistor connected between the current source and a ground terminal, converting the second current into a second voltage; and
a voltage comparator connected to the resistor, comparing the second voltage with the set of reference values to generate the output signal.
5. The key press detecting circuit of claim 1, further comprising a chargingdischarging key press detecting circuit connected to the single pin, being controlled to pre-charge or pre-discharge the single pin.
6. The key press detecting circuit of claim 1, further comprising an initializing resistor, a switch, or a serially-connected combination thereof, connected between the single pin and a ground terminal or a voltage source, being controlled to initialize the voltage of the single pin.
7. A key press detecting method for detecting a status of a plurality of keys through a single pin, the plurality of keys being connected in series or in parallel with a plurality of resistors to establish a key module connected to the single pin, the key press detecting method comprising steps of:
A.) providing a first current and a second current related to the first current;
B.) applying the first current to the single pin and adjusting the first current in order to maintain a voltage of the single pin at a first voltage; and
C.) comparing the second current with a set of reference values for generating an output signal representative of the status of the plurality of keys.
8. The key press detecting method of claim 7, wherein the step A comprises the step of mirroring the first current to generate the second current.
9. The key press detecting method of claim 7, wherein the step C comprises steps of:
converting the second current into a second voltage; and
comparing the second voltage with the set of reference values for generating the output signal.
10. The key press detecting method of claim 7, further comprising the step of pre-charging or pre-discharging the single pin, for speeding up response of detecting the status of the plurality of keys.
11. The key press detecting method of claim 7, further comprising the step of initializing the voltage of the single pin.
12. An input device comprising:
a plurality of keys and a plurality of resistors configured to establish a key module connected to a single pin, the key module having an equivalent resistance dependent on the status of the plurality of keys;
a current source providing a first current and a second current related to the first current;
a constant voltage control circuit connected between the current source and the single pin, applying the first current to the single pin and adjusting the first current in order to maintain a voltage of the single pin at a first voltage; and
a current comparator connected to the current source, comparing the second current with a set of reference values to generate an output signal representative of the status of the plurality of keys.
13. The input device of claim 12, wherein the current source comprises a current mirror mirroring the first current to generate the second current.
14. The input device of claim 12, wherein the constant voltage control circuit comprises:
a transistor and a resistor connected in series between the current source and the single pin; and
an operational amplifier having a first input terminal receiving a reference voltage equal to the first voltage, a second input terminal connected to the single pin, and an output terminal providing an error signal applied to a gate of the transistor, thereby adjusting the first current.
15. The input device of claim 12, wherein the current comparator comprises:
a resistor connected between the current source and a ground terminal, converting the second current into a second voltage; and
a voltage comparator connected to the resistor, comparing the second voltage with the set of reference values to generate the output signal.
16. The input device of claim 12, further comprising a chargingdischarging circuit connected to the single pin, being controlled to pre-charge or pre-discharge the single pin.
17. The input device of claim 12, further comprising an initializing resistor, a switch, or a serially-connected combination thereof, connected between the single pin and a ground terminal or a voltage source, being controlled to initialize the voltage of the single pin.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-25. (canceled)
26. A process for generating display images comprising:
acquiring a temporal sequence of recorded images and generating a temporal sequence of display images from the sequence of recorded images; and
generating a display image of the sequence of display images in each instance from a partial sequence of at least two already acquired recorded images of the recorded image sequence, said partial sequence being associated with said display image.
27. The process according to claim 26, wherein the quantity of display images of the sequence of display images is less than the quantity of recorded images of the recorded image sequence.
28. The process according to claim 26, wherein for the purpose of generating the display images at least one display image is determined from a partial sequence with those recorded images of the recorded image sequence which were acquired during or after the determination of the display image immediately preceding the display image andor within a given time period prior to the determination of the display image.
29. The process according to claim 28, wherein the given time period is 1 second.
30. The process according to claim 26, wherein the recorded images and display images are formed by an arrangement of pixels and wherein for determining at least one display image the value of at least one pixel parameter of at least one pixel of the display image is determined from values of a pixel parameter of at least one recorded image pixel in the partial sequence of already acquired recorded images that is associated with the display image, which recorded image pixel is associated with the pixel of the respective display image.
31. The process according to claim 30, wherein the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, and wherein two pixel parameters of a pixel of the display image reproduce a color and brightness of the pixel depending upon values of the recorded image pixel parameter of the associated pixel of the associated partial sequence of recorded images.
32. The process according to claim 30, wherein the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, and wherein the value of the at least one pixel parameter of a pixel of the respective display image renders the maximum, the minimum or an average of the recorded image pixel parameter of the associated pixel of the associated partial sequence of the recorded images.
33. The process according to claim 30, wherein the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, the value of the at least one pixel parameter of the pixel of the respective display image renders the range of variation of the values of the recorded image pixel parameter of the pixel of the associated partial sequence of previously acquired recorded images, which pixel is associated with the display image pixel.
34. The process according to claim 30, wherein the value of at least one pixel parameter of at least one pixel of the display image is determined depending on the progress of the values of at least one pixel parameter of at least one pixel of the recorded images of the partial sequence which is associated with the display image.
35. The process according to claim 30, wherein a color is associated with at least one pixel of the recorded images of a partial sequence as a pixel parameter, which color corresponds to the position of the recorded image in the partial sequence or to the acquisition time, and wherein a value of a pixel parameter of a display image pixel associated with the recorded image pixel, which pixel parameter reproduces a color, is determined depending on the values of the pixel parameter.
36. The process according to claim 26, wherein the maximum of the brightnesses of the pixels of the associated partial sequence of preceding recorded images, which pixels are associated with at least one pixel of the display image as pixel parameter, is associated with the at least one pixel of the display image, then the brightness value is retained for a predetermined period of time and is then reduced by a predetermined dropping speed, wherein the brightness value of the pixel of the display image is reset when a brightness value of the associated pixel in a current recorded image is greater than the current brightness value of the pixel in the display image.
37. An image processing device which comprises:
an acquisition interface for acquiring recorded image data or recorded image signals; and
a graphics interface for a display device and which is constructed in such a way that a temporal sequence of recorded images can be acquired via the acquisition interface and an image data acquisition device connected to the latter and a temporal sequence of display images can be generated from the recorded image sequence;
wherein a display image of the display image sequence is generated from a partial sequence of at least two already acquired recorded images of the recorded image sequence, said partial sequence being associated with the display image of the display image sequence; and
wherein the display images can be sent to the display device via the graphics interface.
38. The image processing device according to claim 37, which is further constructed in such a way that the quantity of display images of the sequence of display images is less than the quantity of recorded images of the recorded image sequence. preferably 1 s, prior to the determination of the display image.
39. The image processing device according to claim 37, which is further constructed in such a way that for the purpose of generating the display images at least one display image is determined from a partial sequence with those recorded images of the recorded image sequence which were acquired during or after the determination of the display image immediately preceding the display image andor within a given time period prior to the determination of the display image.
40. The image processing device according to claim 39, wherein the given time period is 1 second.
41. The image processing device according to claim 37, wherein the recorded images and display images are formed by an arrangement of pixels, and which is further constructed in such a way that for determining at least one display image the value of at least one pixel parameter of at least one pixel of the display image is determined from values of a pixel parameter of at least one recorded image pixel in the partial sequence of already acquired recorded images that is associated with the display image, which recorded image pixel is associated with the pixel of the respective display image.
42. The image processing device according to claim 41, which is further constructed in such a way that the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, and two pixel parameters of a pixel of the display image reproduce a color and brightness of the pixel depending upon values of the recorded image pixel parameter of the associated pixel of the associated partial sequence of recorded images.
43. The image processing device according to claim 41, which is further constructed in such a way that the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, and that the value of the at least one pixel parameter of a pixel of the respective display image renders the maximum, the minimum or an average of the recorded image pixel parameter of the associated pixel of the associated partial sequence of the recorded images.
44. The image processing device according to claim 41, which is further constructed in such a way that the recorded image pixel parameter reproduces an intensity, a gray scale value or a brightness of the recorded image pixel, and the at least one pixel parameter of the pixel of the respective display image renders the range of variation of the values of the recorded image pixel parameter of the pixel of the associated partial sequence of previously acquired recorded images, which pixel is associated with the display image pixel.
45. The image processing device according to claim 41, which is further constructed in such a way that the value of at least one pixel parameter of at least one pixel of the display image is determined depending on the progress of the values of at least one pixel parameter of at least one pixel of the recorded images of the partial sequence which is associated with the display image.
46. The image processing device according to claim 41, which is further constructed in such a way that a color is associated with at least one pixel of the recorded images of a partial sequence as a pixel parameter, which color corresponds to the position of the recorded image in the partial sequence or to the acquisition time, and a value of a pixel parameter of a display image pixel associated with the recorded image pixel, which pixel parameter reproduces a color, is determined depending on the values of the pixel parameter.
47. The image processing device according to claim 41, which is further constructed in such a way that the maximum of the brightnesses of the pixels of the associated partial sequence of preceding recorded images, which pixels are associated with at least one pixel of the display image as pixel parameter, is associated with the at least one pixel of the display image, then the brightness value is retained for a predetermined period of time and is then reduced by a predetermined dropping speed, wherein the brightness value of the pixel of the display image is reset when a brightness value of the associated pixel in a current recorded image is greater than the current brightness value of the pixel in the display image.
48. The imaging device with an image data acquisition device, imaging optics for imaging an object on the image data acquisition device, and an image processing device according to claim 37, wherein the acquisition interface is connected to the image data acquisition device.
49. The imaging device according to claim 48 which is constructed as a microscope, in particular a laser scanning microscope.
50. The imaging device according to claim 49 which is constructed as a laser scanning microscope, wherein the image data acquisition device simultaneously acquires an at least line-shaped region or a group of points of a sample.
51. A computer program for a data processing device which comprises:
an acquisition interface for acquiring recorded image data or recorded image signals;
a graphics interface for a display device;
a storage in which data and the computer program are stored; and
at least one processor which is connected to the interfaces and to the storage, the computer program comprising instructions and, when the instructions are carried out, the processor implements a process according to claim 26 and sends the generated display images to the display device via the graphics interface.
52. A storage medium on which a computer program according to claim 51 is stored.