IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0303296
(2007-06-26)
|
등록번호 |
US-8237685
(2012-08-07)
|
국제출원번호 |
PCT/IB2007/052471
(2007-06-26)
|
§371/§102 date |
20081203
(20081203)
|
국제공개번호 |
WO2008/007276
(2008-01-17)
|
발명자
/ 주소 |
- Van De Wijdeven, Sander Bernard Francis
- Lashina, Tatiana Aleksandrovna
|
출원인 / 주소 |
- Koninklijke Philips Electronics N.V.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
8 |
초록
▼
A method, device and computer program product for determining the material of an object based on its optical characteristics is disclosed. More specifically, the method operable on a touch screen that includes on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j=1 to M), c
A method, device and computer program product for determining the material of an object based on its optical characteristics is disclosed. More specifically, the method operable on a touch screen that includes on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j=1 to M), comprises the steps of transmitting a light from each of the light sources to an object within the boundary of the touch screen, determining a distance from the object to each of the light sources and each of the sensors, detecting the presences of the transmitted light at each of the sensors, determining, at each of the sensors a reflective index, n2 of the object and determining the object material based on the determined reflective indices.
대표청구항
▼
1. A method for determining a material of an object, based on its optical characteristics, within boundaries of a touch screen, the touch screen including on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j =1 to M), the method comprising the steps of: transmitting a ligh
1. A method for determining a material of an object, based on its optical characteristics, within boundaries of a touch screen, the touch screen including on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j =1 to M), the method comprising the steps of: transmitting a light sequentially from each of the light sources to the object within the boundary of the touch screen, wherein a portion of the sequentially transmitted light is one or more of (i) absorbed, (ii) reflected, and (iii) transmitted by the object;detecting a respective presence of the sequentially transmitted light at each of the sensors, wherein one or more of the sensors receive varying degrees of the sequentially transmitted light;determining a respective distance from the object (i) to each of the light sources and (ii) to each of the sensors;determining a respective reflective index (n2) of the object at each of the sensors, wherein each reflective index is based on (i) a light intensity (Ir) after being reflected from the object, (ii) a light intensity (Ii) just before light reaches a surface of the object, and (iii) a reflective index close to one; anddetermining the material of the object based on the respective determined reflective indices. 2. The method as recited in claim 1, further comprising the step of: determining a set of light intensity calibration data for each of the sensors for light transmitted from each of the light sources. 3. The method as recited in claim 2, wherein the step of detecting the respective presence of sequentially transmitted light at each sensor further comprises the steps of: measuring a light intensity at each of the sensors for each sequentially transmitted light; andcomparing the measured light intensity at each of the sensors for each sequentially transmitted light to an associated light calibration data of the set of light intensity calibration data. 4. The method as recited in claim 1, wherein the step of transmitting the light sequentially from each of the light sources to the object comprises the step of: turning on each of the N light sources for a predetermined length of time in a predetermined sequence. 5. The method as recited in claim 1, wherein the step of determining the object material based on the respective determined reflective indices comprises the steps of: determining a first reflective index based on each sensor's determined reflective index associated with each light source;determining a final reflective index based on each of the first reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 6. The method as recited in claim 5, wherein the step of determining the first reflective index includes using one selected from the group consisting of averaging and histogramming, and wherein the step of determining the final reflective index includes using one selected from the group consisting of averaging and histogramming. 7. The method as recited in claim 1, wherein the step of determining the object material based on the respective determined reflective indices, comprises the steps of: determining a final reflective index based on each of the respective determined reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 8. The method as recited in claim 7, wherein the step of determining the final reflective index includes using one selected from the group consisting of averaging and histogramming. 9. A device for determining a material of an object, based on its optical characteristics, within boundaries of a touch screen, the touch screen including on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j =1 to M), the device comprising: a processor in communication with a memory, the processor executing the instructions of:transmitting a light sequentially from each of the light sources to the object within the boundary of the touch screen, wherein a portion of the sequentially transmitted light is one or more of (i) absorbed, (ii) reflected, and (iii) transmitted by the object;detecting a respective presence of the sequentially transmitted light at each of the sensors, wherein one or more of the sensors receive varying degrees of the sequentially transmitted light;determining a respective distance from the object (i) to each of the light sources and (ii) to each of the sensors;determining a respective reflective index (n2) of the object at each of the sensors, wherein each reflective index is based on (i) a light intensity (Ir) after being reflected from the object, (ii) a light intensity (Ii) just before light reaches a surface of the object, and (iii) a reflective index close to one; anddetermining the material of the obiect based on the respective determined reflective indices. 10. The device as recited in claim 9, the processor further executing the instruction of: determining a set of light intensity calibration data for each of the sensors for light transmitted from each of the light sources. 11. The device as recited in claim 10, wherein the instruction of detecting the respective presence of sequentially transmitted light at each sensor further comprises the instructions of: measuring a light intensity at each of the sensors for each sequentially transmitted light; andcomparing the measured light intensity at each of the sensors for each sequentially transmitted light to an associated light calibration data of the set of light intensity calibration data. 12. The device as recited in claim 9, wherein the instruction of transmitting the light sequentially from each of the light sources to the object comprises the instruction of: turning on each of the N light sources for a predetermined light of time in a predetermined sequence. 13. The device as recited in claim 9, wherein the instruction of determining the object material based on the respective determined reflective indices comprises the instructions of: determining a first reflective index based on each sensor's determined reflective index associated with each light source;determining a final reflective index based on each of the first reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 14. The device as recited in claim 13, wherein the instruction of determining the first reflective index includes using one selected from the group consisting of averaging and histogramming, and wherein the instruction of determining the final reflective index includes using one selected from the group consisting of averaging and histogramming. 15. The device as recited in claim 9, wherein the instruction of determining the object material based on the respective determined reflective indices, comprises the instructions of: determining a final reflective index based on each of the respective determined reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 16. The device as recited in claim 15, wherein the instruction of determining the final reflective index includes using one selected from the group consisting of averaging and histogramming. 17. A non-transitory computer readable media embodied with a computer program providing instructions to a computer system for determining a material of an object, based on its optical characteristics, within boundaries of a touch screen, the touch screen including on its periphery a plurality of light sources (Li, i=1 to N) and sensors (Sj, j =1 to M), the instructions when loaded into the computer system causing the computer system to execute the steps of: transmitting a light sequentially from each of the light sources to the object within the boundary of the touch screen, wherein a portion of the sequentially transmitted light is one or more of (i) absorbed, (ii) reflected, and (iii) transmitted by the object;detecting a respective presence of the sequentially transmitted light at each of the sensors, wherein one or more of the sensors receive varying degrees of the sequentially transmitted light;determining a respective distance from the object (i) to each of the light sources and (ii) to each of the sensors;determining a respective reflective index (n2) of the object at each of the sensors, wherein each reflective index is based on (i) a light intensity (Ir) after being reflected from the object, (ii) a light intensity (Ii) just before light reaches a surface of the object, and (iii) a reflective index close to one; anddetermining the material of the object based on the respective determined reflective indices. 18. The non-transitory computer readable media as recited in claim 17, the instructions causing the computer system to further execute the step of: determining a set of light intensity calibration data for each of the sensors for light transmitted from each of the light sources. 19. The non-transitory computer readable media as recited in claim 18, wherein the step of detecting the respective presence of sequentially transmitted light at each sensor further comprises the steps of: measuring a light intensity at each of the sensors for each sequentially transmitted light; andcomparing the measured light intensity at each of the sensors for each sequentially transmitted light to an associated light calibration data of the set of light intensity calibration data. 20. The non-transitory computer readable media as recited in claim 17, wherein the step of transmitting the light sequentially from each of the light sources to the object comprises the step of: turning on each of the N light sources for a predetermined length of time in a predetermined sequence. 21. The non-transitory computer readable media as recited in claim 17, wherein the step of determining the object material based on the respective determined reflective indices, comprises the steps of: determining a first reflective index based on each sensor's determined reflective index associated with each light source;determining a final reflective index based on each of the first reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 22. The non-transitory computer readable media as recited in claim 21, wherein the step of determining the first reflective index includes using one selected from the group consisting of averaging and histogramming, and wherein the step of determining the final reflective index includes using one selected from the group consisting of averaging and histogramming. 23. The non-transitory computer readable media as recited in claim 17, wherein the step of determining the object material based on the respective determined reflective indices, comprises the steps of: determining a final reflective index based on each of the respective determined reflective indices; anddetermining the object material by correlating the final reflective index to a predetermined database of reflective indices and materials. 24. The non-transitory computer readable media as recited in claim 23, wherein the step of determining the final reflective includes using one selected from the group consisting of averaging and histogramming.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.