INFORMATION DETECTING DISPLAY DEVICE AND METHOD FOR DETECTING INFORMATION IN THE DISPLAY DEVICE

• US 20100283771A1
• Filed: 04/02/2010
• Published: 11/11/2010
• Est. Priority Date: 05/06/2009
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Hyung-Guel, LEE, Hui-Sung, CHO, Jae-Hyun, YOON, Kyung-Hoon
• Application Number:
  US12/753,366
• Publication Number:
  US 20100283771A1
• Time in Patent Office: Days
• US Class Current: 345/207
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

An information detecting display device includes an information detecting substrate having a photo-sensor and a switching substrate facing the information detectable substrate, wherein the information detectable substrate includes a first substrate, a plurality of photo-sensors arranged in a matrix on the first substrate and which generate sensing signals, a plurality of sensor scanning lines which transmit sensor scanning signals for controlling output of the sensing signals and a plurality of sensor signal lines which transmit the sensing signals in response to the sensor scanning signals, wherein at least two of the sensor scanning lines transmit substantially the substantially same sensor scanning signals simultaneously.

Claims

1. An information detecting display device comprising:

an information detecting substrate comprising;

a first substrate;

a plurality of photo-sensors arranged in a matrix on the first substrate, wherein the photo-sensors generate a plurality of sensing signals;

a plurality of sensor scanning lines which transmits a plurality of sensor scanning signals which controls an output of the plurality of sensing signals; and

a plurality of sensor signal lines which transmits the sensing signals in response to the plurality of sensor scanning signals,

wherein at least two of the plurality of sensor scanning lines transmit a substantially similar sensor scanning signal simultaneously; and

a switching substrate comprising;

a second substrate;

a plurality of pixel electrodes arranged in a matrix on the second substrate;

a plurality of switching elements electrically connected to the plurality of pixel electrodes and a plurality of switch scanning lines; and

a plurality of switch signal lines electrically connected to the plurality of switching elements.

2. The information detecting display device of claim 1, wherein the plurality of switch scanning lines and the plurality of switch signal lines face and overlap the plurality of sensor scanning lines and the plurality of sensor signal lines, respectively.

3. The information detecting display device of claim 2, wherein a number of the plurality of sensor scanning lines is smaller than a number of the plurality of switch scanning lines.

4. The information detecting display device of claim 2, wherein a number of the plurality of sensor signal lines is smaller than a number of the plurality of switch signal lines.

5. The information detecting display device of claim 1, wherein the switching substrate further comprises a plurality of color filter layers.

6. The information detecting display device of claim 5, wherein the switching substrate further comprises a plurality of opaque layers disposed between the plurality of color filter layers, the opaque layers overlapping the plurality of sensor signal lines.

7. The information detecting display device of claim 6, wherein the information detecting substrate further comprises a common electrode which generates an electric field along with the plurality of pixel electrodes.

8. The information detecting display device of claim 1, wherein at least two of the plurality of sensor scanning lines are electrically connected to each other.

9. The information detecting display device of claim 1, wherein the information detecting substrate further comprises:

a first sensor scanning part and a second sensor scanning part, each of which are electrically connected to a first side of the first substrate and which transmit the plurality of sensor scanning signals to the plurality of sensor scanning lines;

a first sensor reader part electrically connected to a second side of the first substrate and which receives first sensing signals from first photo-sensors of the plurality of photo-sensors, the first photo-sensors being electrically connected to the first sensor scanning part; and

a second sensor reader part electrically connected to a third side of the first substrate and which receives second sensing signals from second photo-sensors of the plurality of photo-sensors, the second photo-sensors being electrically connected to the second sensor scanning part.

10. The information detecting display device of claim 9, wherein the first sensor scanning part and the second sensor scanning part substantially simultaneously transmit the substantially same sensor scanning signals to the plurality of sensor scanning lines.

11. The information detecting display device of claim 10, wherein the plurality of switch scanning lines and the plurality of switch signal lines face and overlap the plurality of sensor scanning lines and the plurality of sensor signal lines, respectively.

12. The information detecting display device of claim 11, wherein a number of the plurality of sensor scanning lines is smaller than a number of the plurality of switch scanning lines.

13. The information detecting display device of claim 11, wherein a number of the plurality of sensor signal lines is smaller than a number of the plurality of switch signal lines.

14. The information detecting display device of claim 10, wherein the switching substrate further comprises a plurality of color filter layers.

15. The information detecting display device of claim 14, wherein the switching substrate further comprises a plurality of opaque layers disposed between the plurality of color filter layers, the plurality of opaque layers overlapping the plurality of sensor signal lines.

16. The information detecting display device of claim 15, wherein the information detecting substrate further comprises a common electrode which generates electric fields along with the plurality of pixel electrodes.

17. An information detecting display device comprising:

an information detecting substrate comprising;

a first substrate;

a plurality of first and second groups of photo-sensors arranged in a matrix on the first substrate, the first and second groups of photo-sensors respectively generating a plurality of first, second, third and fourth sensing signals;

a first sensor scanning part disposed at a first portion of a first side of the first substrate and transmitting a plurality of first sensor scanning signals to the first group of photo-sensors via a plurality of first sensor scanning lines,

a second sensor scanning part disposed at a second portion of the first side of the first substrate and transmitting a plurality of second sensor scanning signals to the second group of photo-sensors via a plurality of second sensor scanning lines, the second portion being adjacent to the first portion; and

a sensor reader part receiving the first, second, third and fourth sensing signals from the photo-sensors via a plurality of first, second, third and fourth sensor signal lines; and

a switching substrate including a plurality of pixel units.

18. The information detecting display device of claim 17, wherein the sensor reader part comprises:

a first sensor reader part disposed at a second side of the first substrate and receiving the first and second sensing signals from the first group of photo-sensors via the first and second sensor signal lines; and

a second sensor reader part disposed at a third side of the first substrate and receiving the third and fourth sensing signals from the second group of photo-sensors via the third and fourth sensor signal lines,

wherein the third side is opposite to the second side.

19. The information detecting display device of claim 17, wherein the sensor reader part comprises:

a first sensor reader part disposed at a first portion of a second side of the first substrate and receiving the first sensing signals from a first sub group of the first group of photo-sensors via the first sensor signal lines;

a second sensor reader part disposed at a second portion of the second side of the first substrate and receiving the second sensing signals from a second sub group of the first group of photo-sensors via the second sensor signal lines;

a third sensor reader part disposed at a first portion of a third side of the first substrate and receiving the third sensing signals from a first sub group of the second group of photo-sensors via the third sensor signal lines; and

a fourth sensor reader part disposed at a second portion of the third side of the first substrate and receiving the fourth sensing signals from a second sub group of the second group of photo-sensors via the fourth sensor signal lines,

wherein the second portion of the second side is adjacent to the first portion of the second side, the second portion of the third side is adjacent to the first portion of the third side, and the second side is opposite to the third side.

20. A method for detecting information in a display device, the method comprising:

generating a plurality of sensing signals by a plurality of photo-sensors arranged in a matrix on a first substrate;

transmitting a plurality of sensor scanning signals from a sensor scanning part to the photo-sensors via a plurality of sensor scanning lines, at least two of the sensor scanning lines transmitting a substantially similar sensor scanning signal simultaneously;

transmitting the sensing signals from the photo-sensors to a sensor reader part via a plurality of sensor signal lines in response to the sensor scanning signals;

processing the sensing signals by the sensor reader part to provide processed sensing signals to a controller; and

determining a position of the sensing signals based on the sensor scanning signals and the sensing signals.