Apparatus for measuring response time and method of measuring of response time using the same
View Patent ↗An apparatus for measuring response time of a display apparatus including a photographing part including a charge coupled device camera and a microscope, an image processing part receiving a picture taken from a photographing part and calculating the response time thereof, and a control part applying a predetermined image signal to the display apparatus and controlling the photographing part to take a picture change of the display apparatus at a predetermined time.
1. An apparatus for measuring a response time of a display apparatus, comprising:
a photographing part which takes a picture, the photographing part comprising a charge coupled device camera and a microscope;
an image processing part which receives the picture taken by the photographing part and calculates the response time of each position on the picture; and
a control part which applies a predetermined image signal to the display apparatus and controls the photographing part to take a picture change of the display apparatus at a predetermined time.
2. The apparatus of claim 1 , wherein a shutter interval of the charge coupled device camera is less than approximately 1 ms.
3. The apparatus of claim 2 , wherein the shutter interval of the charge coupled device camera is less than approximately 0.1 ms.
4. The apparatus of claim 1 , wherein the microscope assists a pixel of the charge coupled device camera to photograph an image in an area that is less than approximately 10 μm.
5. The apparatus of claim 1 , wherein the image processing part processes the picture with a luminance change of the picture.
6. The apparatus of claim 1 , wherein the charge coupled device camera is a color charge coupled device camera.
7. The apparatus of claim 1 , further comprising: a table provided below the photographing part.
8. The apparatus for measuring response time according to claim 7 , further comprising: a driving part moving the table.
9. The apparatus for measuring response time according to claim 7 , further comparing: a temperature chamber accommodating the table.
10. The apparatus for measuring response time according to claim 7 , further comprising: a lamp unit provided below the table.
11. The apparatus of claim 10 , wherein the table is made with a transparent material.
12. The apparatus of claim 1 , further comprising: a temperature plate provided below the photographing part; and a temperature control part controlling the temperature of the temperature plate.
13. The apparatus of claim 12 , wherein the temperature plate includes a first temperature plate and a second temperature plate.
14. The apparatus of claim 12 , further comprising: a lamp unit provided below the temperature plate.
15. The apparatus of claim 14 , wherein a hole is formed in the temperature plate.
16. The apparatus of claim 1 , wherein the display apparatus comprises a liquid crystal display panel.
17. A method for measuring response time of a display apparatus, comprising:
transmitting a predetermined image signal to the display apparatus;
taking a picture of a change of the display apparatus at a predetermined interval of time according to the predetermined image signal; and
calculating the response time of each position on the picture by processing the picture.
18. The method of claim 17 , wherein the predetermined interval of time is less than approximately 1 ms.
19. The method of claim 17 , wherein the predetermined interval of time is less than approximately 0.1 ms.
20. The method of claim 17 , wherein the picture is taken by a pixel of a charge coupled device camera in an area that is less than 10 μm.
21. The method of claim 17 , wherein the calculating the response time comprises: calculating the response time of a plurality of positions on the picture.
22. The method of claim 17 , further comprising: moving the display apparatus when taking the picture of the display apparatus.
23. The method of claim 17 , further comprising: maintaining a temperature of the display apparatus at a constant temperature when taking the picture.
24. The method of claim 17 , wherein the display apparatus comprises a liquid crystal display panel.
25. The method of claim 24 , further comprising: calculating the response time of each pixel on the liquid crystal display panel.
26. The method of claim 24 , wherein the liquid display crystal display panel is a multi-domain mode liquid crystal display panel.
27. The method of claim 26 , wherein the display crystal display panel is a patterned vertical alignment mode liquid crystal display panel.