Information detection device and information detection display device

• US 20060060752A1
• Filed: 09/20/2005
• Published: 03/23/2006
• Est. Priority Date: 09/21/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Joo-Hyung, Pak, Sang-Jin, Park, Jong-Woung, Uh, Kee-Han, Choi, Young-Jun
• Granted Patent: US 7,773,078 B2
• Time in Patent Office: Days
• US Class Current: 250/208.100
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body

Abstract

An information detection device according to an embodiment of the present invention includes: light sensing units generating photocurrents according to light amount and outputting sensor data signals based on the photocurrent; sensor scanning lines receiving sensor scanning signals from a sensor scanning driver and controlling the output of the sensor data signals from the light sensing units; sensor data lines transmitting the sensor data signals from the light sensing units; and a sensing signal processor receiving the sensor data signals from the sensor data lines at input terminals, wherein the number of the input terminals of the sensing signal processor is less than the number of the sensor data lines.

Claims

1. An information detection device comprising:

a plurality of light sensing units being operative to generate a current in an amount which is a function of an amount of light impacting the light sensor units and to output sensor data signals based on the current;

a sensor scanning driver having a plurality of output terminals for providing a plurality of sensor scanning signals;

sensor scanning lines coupled to the output terminals of the sensor scanning driver for receiving sensor scanning signals from the sensor scanning driver and controlling an output of the sensor data signals from the light sensing units;

sensor data lines coupled to the light sensing units for receiving sensor data signals from the light sensing units; and

a sensing signal processor having a plurality of input terminals for receiving the sensor data signals via the sensor data lines,

wherein the number of the input terminals of the sensing signal processor is less than the number of the sensor data lines.

2. The information detection device of claim 1, wherein at least one of the sensor data lines is commonly connected to another sensor data line and the commonly connected data lines provide sensor data signals to the sensing signal processor when one of the sensor scanning lines is supplied with a scanning signal.

3. The information detection device of claim 2, wherein each of the light sensing units comprises:

a sensing element which generates an amount of current as a function of an amount of light impacting the sensing element; and

a switching element which provides the sensor data signals in response to a sensor scanning signal.

4. The information detection device of claim 3, wherein the sensing element comprises amorphous silicon.

5. The information detection device of claim 1, wherein the number of the sensor scanning lines is greater than the number of output terminals of the sensor scanning driver.

6. The information detection device of claim 5, wherein at least two of the sensor scanning lines are electrically connected to simultaneously receive a scanning signal from one output terminal of the sensor scanning driver.

7. An information detection device comprising:

a plurality of light sensing units being operative to generate a current in an amount which is a function of an amount of light impacting the light sensor units and to output sensor data signals based on the current;

sensor scanning lines for receiving and transmitting sensor scanning signals to control an output of the sensor data signals from the light sensing units;

a sensor scanning driver generating the sensor scanning signals and providing the sensor scanning signals to the sensor scanning lines through output terminals of the sensor scanning driver, wherein the number of the sensor scanning driver output terminals is less than the number of the sensor scanning lines;

sensor data lines coupled to the light sensing units for receiving sensor data signals; and

a sensing signal processor coupled to the sensor data lines for receiving the sensor data signals from the sensor data lines and processing the received sensor data signals.

8. The information detection device of claim 7, wherein at least two of the sensor scanning lines are electrically connected to simultaneously receive a scanning signal.

9. An information detection display device comprising:

light sensing units disposed in areas defined by image scanning lines and image data lines on a first substrate and being disposed under pixel electrodes, the light sensing units being operative to generate a current in an amount which is a function of an amount of light impacting the light sensing units and output sensor data signals based on the current;

a sensor scanning driver providing sensor scanning signals;

sensor scanning line disposed on the first substrate, and coupled to the sensor scanning driver for receiving sensor scanning signals from the sensor scanning driver and controlling the output of the sensor data signals from the light sensing units;

a sensing signal processor;

a sensor data line disposed on the first substrate, the sensor data line coupled to a light sensing unit disposed under at least one red color filter stripe, at least one green color filter stripe, and at least one blue color filter stripe to receive sensor data signals and transmit the sensor data signals to the sensing signal processor.

10. The information detection display device of claim 9, wherein the sensor scanning lines are image scanning lines, and the sensor scanning driver is an image scanning driver.

11. The information detection display device of claim 9, wherein each of the light sensing units comprises:

a sensing element including amorphous silicon and generating photocurrents according to light amount; and

a switching element outputting the sensor data signals in response to a sensor scanning signal.

12. The information detection display device of claim 9, wherein the number of the sensor scanning lines is greater than the number of the sensor scanning signals supplied from the sensor scanning driver.

13. The information detection display device of claim 12, wherein at least two of the sensor scanning lines are electrically connected to simultaneously receive a scanning signal.

14. The information detection display device of claim 9, wherein driving voltage lines for the light sensing units are disposed between the image data signal lines and the sensor data lines adjacent to the image data signal lines in areas defined by the image scanning lines and the image data lines.

15. The information detection display device of claim 14, wherein the driving voltage lines are electrically connected to the light sensing units, and supplied with a DC voltage.

16. The information detection display device of claim 14, wherein the driving voltage lines are electrically connected to the light sensing units and the image scanning lines.

17. The information detection display device of claim 16, wherein the sensor scanning lines include image scanning lines that are separated from the driving voltage lines.

18. The information detection display device of claim 9, wherein when a single gray of a single color is displayed along one of image data lines, and image data signals sequentially applied to the one of the image data lines give different voltages to adjacent pixel electrodes, the sensor scanning lines that are connected to the light sensing units disposed under the adjacent pixel electrodes are electrically connected to each other such that the light sensing units disposed under the adjacent pixel electrodes output the sensor data signals to the sensor data lines to be added the information detection display device.

19. The information detection display device of claim 9, wherein the pixel electrodes comprise transparent electrodes and opaque electrodes.

20. The information detection display device of claim 19, wherein the light sensing units are disposed under the opaque electrodes, and the opaque electrodes have openings to allow incident light to reach the light sensing units.

21. An information detection device comprising:

a plurality of light sensing units generating sensor data signals as a function of an amount of incident light and outputs the sensor data signals in response to sensor scanning signals;

a signal synthesizer coupled to the light sensing units and synthesizing at least two output signals of the light sensing units; and

a sensing signal processor coupled to the signal synthesizer, the sensing signal processor generating an output signal based on received synthesized signals.