Ultraviolet intensity detecting method, fabricating display apparatus method and display apparatus using the same

• US 8,188,441 B2
• Filed: 03/02/2009
• Issued: 05/29/2012
• Est. Priority Date: 05/30/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Sheng, Chi-Hua, Luo, Ruei-Liang, Li, Chun-Huai
• Primary Examiner(s): Porta, David
• Assistant Examiner(s): Bryant, Casey
• Application Number:
  US12/395,717
• Publication Number:
  US 20090294684A1
• Time in Patent Office: 1,184 Days
• Field of Search: 250/372, 250/370.08, 257/431, 257/443, 257/444, 345/87, 345/102, 345/175, 345/207
• US Class Current: 250/370.08
• CPC Class Codes: G01J 1/02 Details
• CPC Class Codes: G01J 1/0228 Control of working procedures; Failure detection; Spectral bandwidth calculation
• CPC Class Codes: G01J 1/04 Optical or mechanical part supplementary adjustable parts
• CPC Class Codes: G01J 1/0429 using polarisation elements
• CPC Class Codes: G01J 1/1626 Arrangements with two photodetectors, the signals of which are compared
• CPC Class Codes: G01J 1/429 applied to measurement of ultraviolet light using counting tubes G01T
• CPC Class Codes: G01J 2001/4266 for measuring solar light

Abstract

A display apparatus is provided. The display apparatus is used for detecting an ultraviolet (UV) intensity. The display apparatus includes a lower-substrate, an upper-substrate and a processing unit. The lower-substrate includes a first, a second and a third photo sensors for detecting an intensity of the light in a first, a second and a third bands and converting the intensity of the light in the first, the second and the third bands into a first, a second and a third currents respectively, wherein the ranges of the second and the third bands are comprised within the range of the first band. The upper-substrate is disposed opposite to the lower-substrate. The processing unit is coupled to the first, the second and the third photo sensors, for receiving and processing the first, the second and the third currents so as to obtain the UV intensity.

Claims

1. A display apparatus for detecting an ultraviolet (UV) intensity, the display apparatus comprising:

a lower substrate comprising a first photo sensor, a second photo sensor, and a third photo sensor for detecting an intensity of light, from the external of the display apparatus, of a first band, a second band, and a third band and converting the intensity of the light in the first band, the second band, and the third band into a first current, a second current, and a third current respectively;

an upper substrate disposed opposite to the lower substrate; and

a processing unit coupled to the first photo sensor, the second photo sensor, and the third photo sensor, for receiving and processing the first current, the second current, and the third current so as to only obtain a UV intensity of a UVB band,

wherein the ranges of the second band and the third band are comprised within the range of the first band wherein the first band is a band of sunlight, and wherein the second band and the third band are bands of visible light.

2. The display apparatus according to claim 1, wherein the upper substrate comprises a first color resist corresponding to the second photo sensor.

3. The display apparatus according to claim 2, wherein the upper substrate further comprises a polarizer corresponding to the third photo sensor.

4. The display apparatus according to claim 2, wherein the lower substrate further comprises a fourth photo sensor coupled to the processing unit for detecting an intensity of the light of a fourth band and converting the intensity of the light in the fourth band into a fourth current, wherein the range of the fourth band is comprised within the range of the first band.

5. The display apparatus according to claim 4, wherein the upper substrate further comprises:

a polarizer, corresponding to the third photo sensor; and

a second color resist, corresponding to the fourth photo sensor.

6. The display apparatus according to claim 4, wherein the upper substrate further comprises:

a second color resist, corresponding to the third photo sensor; and

a third color resist, corresponding to the fourth photo sensor.

7. The display apparatus according to claim 2, wherein the lower substrate further comprises:

a fourth photo sensor, coupled to the processing unit, for detecting an intensity of the light of a fourth band and converting the intensity of the light in the fourth band into a fourth current; and

a fifth photo sensor, coupled to the processing unit, for detecting an intensity of the light of a fifth band and converting the intensity of the light in the fifth band into a fifth current, wherein the ranges of the fourth band and the fifth band are comprised within the range of the first band.

8. The display apparatus according to claim 7, wherein the upper substrate further comprises:

a polarizer, corresponding to the third photo sensor;

a second color resist, corresponding to the fourth photo sensor; and

a third color resist, corresponding to the fifth photo sensor.

9. A method for detecting an ultraviolet (UV) intensity by using a display apparatus with a display panel and a processing unit, the display panel at least comprising a first detection unit, a second detection unit and a third detection unit, the method comprising:

detecting an intensity of light, from the external of the display apparatus, of a first band and converting the intensity of the light in the first band into a first current by the first detection unit;

detecting an intensity of the light of a second band and converting the intensity of the light of the second band into a second current by the second detection unit;

detecting an intensity of the light of a third band and converting the intensity of the light of the third band into a third current by the third detection unit; and

receiving and processing the first, the second, and the third currents by the processing unit so as to only obtain a UV intensity of a UVB band,

wherein the ranges of the second band and the third band are comprised within the range of the first band wherein the first band is a band of sunlight, and wherein the second band and the third band are bands of visible light.

10. The method according to claim 9, wherein the step of processing the first, the second, and the third currents comprises:

respectively multiplying the first, the second, and the third currents by a corresponding correction coefficient; and

deducting the second and the third currents from the first current to obtain the UV intensity.

11. The method according to claim 9, wherein the display panel further comprises a fourth detection unit, and the method further comprising:

detecting an intensity of the light in a fourth band and converting the intensity of the light of the fourth band into a fourth current by the fourth detection unit, wherein the range of the fourth band is comprised within the range of the first band.

12. The method according to claim 11, wherein the display panel further comprises a fifth detection unit, the method further comprising:

detecting an intensity of the light in a fifth band and converting the intensity of the light of the fifth band into a fifth current by the fifth detection unit, wherein the range of the fifth band is comprised within the range of the first band.

13. The method according to claim 12, wherein the step of receiving and processing the first, the second, and the third currents by the processing unit further comprises:

receiving and processing the fourth and the fifth currents by the processing unit so as to only obtain the UV intensity of the UVB band.

14. The method according to claim 13, wherein the step of processing the first, the second, the third, the fourth, and the fifth currents comprises:

respectively multiplying the first, the second, the third, the fourth, and the fifth currents by a corresponding correction coefficient; and

deducting a combination of the second, the third, the fourth, and the fifth currents from the first current to obtain the UV intensity.

15. The method according to claim 11, wherein the step of receiving and processing the first, the second, and the third currents by the processing unit further comprises:

receiving and processing the fourth current by the processing unit so as to obtain the UV intensity of the UVB band.

16. The method according to claim 15, wherein the step of processing the first, the second, the third, and the fourth currents comprises:

respectively multiplying the first, the second, the third, and the fourth currents by a corresponding correction coefficient; and

deducting the second, the third, and the fourth currents from the first current to obtain the UV intensity.

17. A method for fabricating a display apparatus with a display panel to detect an ultraviolet (UV) intensity, the method comprising:

disposing a first detection unit on the display panel for detecting an intensity of light, from the external of the display apparatus, of a first band and converting the intensity of the light in the first band into a first current;

disposing a second detection unit on the display panel for detecting an intensity of the light of a second band and converting the intensity of the light in second band into a second current;

disposing a third detection unit on the display panel for detecting an intensity of the light of a third band and converting the intensity of the light of the third band into a third current; and

coupling a processing unit to the first, the second, and the third detection units,

wherein the processing unit receives and processes the first, the second, and the third currents so as to only obtain a UV intensity of a UVB band, and the ranges of the second band and the third band are comprised within the range of the first band wherein the first band is a band of sunlight, and

wherein the second band and the third band are bands of visible light.

18. The method according to claim 17, wherein the step of disposing the first detection unit on the display panel comprises:

disposing a first photo sensor on a lower substrate of the display panel.

19. The method according to claim 18, wherein the step of disposing the second detection unit on the display panel comprises:

disposing a first color resist on an upper substrate of the display panel; and

disposing a second photo sensor corresponding to the first color resist on the lower substrate of the display panel.

20. The method according to claim 19, wherein the step of disposing the third detection unit on the display panel comprises:

disposing a polarizer on the upper substrate of the display panel; and

disposing a third photo sensor corresponding to the polarizer on the lower substrate of the display panel.

21. The method according to claim 19, further comprising:

disposing a fourth detection unit on the display panel for detecting an intensity of the light of a fourth band and converting the intensity of the light of the fourth band into a fourth current; and

coupling a processing unit to the fourth detection units, wherein the processing unit receives and processes the first, the second, the third, and the fourth currents so as to only obtain the UV intensity of the UVB band, and the range of the fourth band is comprised within the range of the first band.

22. The method according to claim 21, wherein the step of disposing the third detection unit on the display panel comprises:

disposing a polarizer on the upper substrate of the display panel; and

disposing a third photo sensor corresponding to the polarizer on the lower substrate of the display panel.

23. The method according to claim 22, wherein the step of disposing the fourth detection unit on the display panel comprises:

disposing a second color resist on the upper substrate of the display panel; and

disposing a fourth photo sensor corresponding to the second color resist on the lower substrate of the display panel.

24. The method according to claim 21, wherein the step of disposing the third detection unit on the display panel comprises:

disposing a second color resist on the upper substrate of the display panel; and

disposing a third photo sensor corresponding to the second color resist on the lower substrate of the display panel.

25. The method according to claim 24, wherein the step of disposing the fourth detection unit on the display panel comprises:

disposing a third color resist on the upper substrate of the display panel; and

disposing a fourth photo sensor corresponding to the third color resist on the lower substrate of the display panel.

26. The method according to claim 19, further comprising:

disposing a fourth detection unit on the display panel for detecting an intensity of the light of a fourth band and converting the intensity of the light of the fourth band into a fourth current;

disposing a fifth detection unit on the display panel for detecting an intensity of the light of a fifth band and converting the intensity of the light of the fifth band into a fifth current; and

coupling the processing unit to the fourth and the fifth detection units, wherein the processing unit receives and processes the first, the second, the third, the fourth, and the fifth currents so as to only obtain the UV intensity of the UVB band, and the fourth band and the fifth band are comprised within the range of the first band.

27. The method according to claim 26, wherein the step of disposing the third detection unit on the display panel comprises:

disposing a polarizer on the upper substrate of the display panel; and

disposing a third photo sensor corresponding to the polarizer on the lower substrate of the display panel.

28. The method according to claim 27, wherein the step of disposing the fourth detection unit on the display panel comprises:

disposing a second color resist on the upper substrate of the display panel; and

disposing a fourth photo sensor corresponding to the second color resist on the lower substrate of the display panel.

29. The method according to claim 28, wherein the step of disposing the fifth detection unit on the display panel comprises:

disposing a third color resist on the upper substrate of the display panel; and

disposing a fifth photo sensor corresponding to the third color resist on the lower substrate of the display panel.