Information detection device and information detection display device

• US 7,773,078 B2
• Filed: 09/20/2005
• Issued: 08/10/2010
• 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: Pak, Sang-Jin, Park, Jong-Woung, Lee, Joo-Hyung, Uh, Kee-Han, Choi, Young-Jun
• Primary Examiner(s): Mengistu; Amare
• Assistant Examiner(s): Bolotin; Dmitriy
• Application Number:
  US11/231,429
• Publication Number:
  US 20060060752A1
• Time in Patent Office: 1,785 Days
• Field of Search: 345/207, 345/81, 345 98-100, 345/175, 345/173, 349/12, 178/18.09, 178/18.03
• US Class Current: 345/207
• 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 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;

at least three sensor data line disposed on the first substrate, each of the at least three sensor data lines coupled to one of the light sensing units so as to form a set of at lest three light sensing units, and the at lest three sensor data lines being coupled to each other, wherein the at lest three light sensing unit comprise a first light sensing unit disposed under at least one red color filter stripe, a second light sensing unit disposed under at least one green color filter stripe, and a third light sensing unit disposed under at least one blue color filter stripe to receive sensor data signals and transmit the sensor data signals to the sensing signal processor.

2. The information detection display device of claim 1, wherein the sensor scanning lines are image scanning lines, and the sensor scanning driver is an image scanning driver.

3. The information detection display device of claim 1, 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.

4. The information detection display device of claim 1, wherein the number of the sensor scanning lines is greater than the number of the sensor scanning signals supplied from the sensor scanning driver.

5. The information detection display device of claim 4, wherein at least two of the sensor scanning lines are electrically connected to simultaneously receive a scanning signal.

6. The information detection display device of claim 1, 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.

7. The information detection display device of claim 6, wherein the driving voltage lines are electrically connected to the light sensing units, and supplied with a DC voltage.

8. The information detection display device of claim 6, wherein the driving voltage lines are electrically connected to the light sensing units and the image scanning lines.

9. The information detection display device of claim 8, wherein the sensor scanning lines include image scanning lines that are separated from the driving voltage lines.

10. The information detection display device of claim 1, wherein when a single gray of a single color is displayed along one of the 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 by the information detection display device.

11. The information detection display device of claim 1, wherein the pixel electrodes comprise transparent electrodes and opaque electrodes.

12. The information detection display device of claim 11, 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.