TWI541494B - Optical film axis angle measurement system and method - Google Patents

Description

Optical film shaft angle measuring system and method

The invention relates to an optical film axis angle measuring system and method, in particular to measuring the optical film axis angle by using a light-emitting device, a rotary polarizer and a photometric measuring device.

Nowadays, due to the advancement of technology and the improvement of the quality of life, liquid crystal displays have been widely used, and optical films in liquid crystal displays are one of the key components that are indispensable. The function of optical films is mainly to filter out specific directions. The light becomes a specific direction of light, so the optical film has its specific axis angle. When measuring the axial angle of an optical film, it is necessary to first cut the reference edge on the optical film by using a cutter, and then manually align the reference edge of the optical film with the reference edge of the measuring tool, and then conveniently use it. The measuring tool measures the axial angle of the optical film. After the measurement of the axial angle of a piece of optical film is completed, the above action is repeated to measure the axial angle of the next (lower) optical film. Therefore, when measuring the axial angle of the optical film, it is necessary to continuously cut and align the optical film by manpower, which is not only time-consuming and laborious, but also the measurement of the optical film axis angle is easy to cause errors due to manpower, thereby affecting the measurement data. Credibility.

Therefore, how to invent an optical film axis angle measuring system and method so as to achieve the purpose of facilitating rapid measurement of high precision optical film axis angles will be actively disclosed in the present invention.

In view of the shortcomings of the above-mentioned prior art, the inventor feels that he has not perfected it, exhausted his mental research and overcome it, and based on his accumulated experience in the industry for many years, he developed an optical film axis angle measuring system and The method aims to achieve the purpose of facilitating rapid measurement of high precision optical film axis angle.

In order to achieve the above object, a first aspect of the present invention is an optical film shaft angle measuring system, comprising: a conveying device that transmits the optical film and forms the optical film into an axial angle measuring section; And disposed on one side of the axial angle measuring section; a rotary polarizer disposed outside the other side of the axial angle measuring section; and an illuminating device disposed on the axial angle measuring section One side, and transmitting a light sequentially through the rotary polarizer, the axis angle measuring segment and the photometric measuring device.

A second aspect of the present invention is an optical film axis angle measuring method, comprising the steps of: transmitting the optical film and forming the optical film into an axial angle measuring segment; and sequentially passing a light through a rotary polarizer, The shaft angle measuring section and the one-shot measuring device; and rotating the rotating polarizer to record the rotation angle of the rotating polarizer when the measuring device measures the minimum illuminance.

Thereby, the optical film shaft angle measuring system and method of the present invention can facilitate rapid measurement of a high precision optical film axis angle.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments and the accompanying drawings.

1 and 2 are schematic views of a transmission optical film and a measurement of an optical film axis angle according to an embodiment of the present invention. As shown in the figure, the first aspect of the present invention is an optical film axis angle measurement system. It comprises a transmitting device 2, a measuring device 3, a rotary polarizer 4 and a lighting device 5. Wherein, the transport device 2 transports a batch of continuous optical films 1 from left to right (or from right to left), the transfer device 2 stops transmitting at a position 13 where the optical film 1 is to measure the axial angle, so that The optical film 1 forms an axial angle measuring section 11 at the position 13; the illuminating measuring device 3 can be an illuminometer which is disposed above the axial angle measuring section 11; the rotary polarizing mirror 4 can be a servo motor (not shown) is rotated to a specific angle, which is disposed below the shaft angle measuring section 11; the light-emitting device 5 is disposed below the shaft angle measuring section 11 and below the rotary polarizer 4, The illuminating device 5 sends a light ray 51 through the rotary polarizer 4, the shaft angle measuring section 11 and the illuminating measuring device 3 in sequence.

When the present invention is applied, the transfer device 2 stops the transfer of the optical film 1 at a position where the optical film 1 axis angle is to be measured, and the optical film 1 is formed at the position 13 to form the axial angle measuring segment 11 to The illuminating measuring device 3, the rotary polarizer 4, and the illuminating device 5 measure the axial angle of the optical film 1 at the position 13. When the illuminating polarizer 4 and the illuminating device 5 measure the axial angle of the optical film 1 at the position 13, the light ray 51 is first emitted by the illuminating device 5 via the rotating polarized light. The mirror 4, the shaft angle measuring section 11 and the illuminating measuring device 3, wherein the rotating polarizer 4 first filters out light in a specific direction, and then the light 51 passes through the shaft angle measuring section 11 It is directed to the photometric measuring device 3. At this time, the rotary polarizer 4 starts counterclockwise rotation (or clockwise rotation) from its starting angle, and the illuminance measured by the photometric measuring device 3 also starts to decrease until the illuminating measuring device When the measured illuminance is the lowest, the angle at which the rotary polarizer 4 is rotated can be recorded as the axial angle of the optical film 1 at the position 13. To measure the axial angle of the optical film 1 at the next position 13, the illumination measuring device 3 and the illumination device 5 can be turned off first, and the rotary polarizer 4 is rotated back to the starting angle, and then The optical film 1 is transported to the next position 13 by the transporting means 2, and then the above-described action is repeated, so that the axial angle of the optical film 1 at different positions 13 can be measured. Since the present invention can utilize the transport device 2, the photometric measuring device 3, the rotary polarizer 4, and the illuminating device 5 to automatically measure the axial angle of the optical film 1 at different positions 13, a rapid amount can be obtained. A high precision optical film axis angle was measured.

3 is a schematic view showing the relationship between the linear position and the axial angle of the optical film according to the embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 simultaneously. As shown in the figure, the optical film 1 can be measured by the system of the present invention. The shaft angle of 13 at different positions. In addition, since the optical film 1 does not initially pass through the alignment process, the measured equiaxed angles are relative values. Furthermore, the accuracy of the optical film 1 at a linear position can be obtained by subtracting the maximum value and the minimum value of the equiaxed angle.

4 is a schematic view showing the relationship between the plane position of the optical film and the axial angle according to the embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 simultaneously, as shown in the figure, if the measuring device 3 and the rotating polarizer 4 are used. And the illuminating device 5 can simultaneously translate in the xy plane, and the system of the present invention can also measure the angular distribution of the axis in the planar position of the optical film 1. In addition, if the optical film 1 does not initially pass the alignment process, the measured equiaxed angles are relative values. Furthermore, the accuracy of the optical film 1 in the planar position can be obtained by subtracting the maximum value and the minimum value of the equiaxed angle.

The conveying device 2 has a take-up reel 21 and a take-up reel 22 which can be rotated by a servo motor (not shown) or rotated by a servo motor and a gear set (not shown). The take-up reel 21 The optical film 1 is taken up, and the winding reel 22 winds up the optical film 1. The optical film 1 forms the axial angle measuring section 11 between the winding reel 21 and the winding reel 22.

5 is a schematic view of the edge of the optical film according to an embodiment of the present invention. As shown in the figure, the system further includes an alignment device 6 and an image capturing device 7, and the alignment device 6 is disposed on the winding reel 22 The right side of the outer side of the optical film 1 is aligned, the alignment device 6 can be a flat plate, and the image capturing device 7 is disposed outside the upper side of the alignment device 6 to view the alignment process of the optical film 1. The image capturing device 7 can be a camera. Before measuring the axial angle of the optical film 1, the end edge 12 of the optical film 1 may be first flattened, and then the alignment device 6 and the image capturing device 7 are used to align the end edges 12 of the optical film 1. Then, the entire batch of optical film 1 has its common reference to measure the absolute axis angle.

6 is a schematic view of a flattening optical film axis angle measuring section according to an embodiment of the present invention. As shown in the figure, the system further includes a hollow leveling device 8 for leveling the shaft angular measuring section 11 Therefore, the illumination measuring device 3, the rotary polarizer 4 and the illumination device 5 can measure a precise shaft angle through the hollow leveling device 8.

The hollow leveling device 8 can have an upper hollow clamp 81 and a lower hollow clamp 82. The upper hollow clamp 81 is disposed on the upper surface of the axial angle measuring section 11, and the lower hollow clamp 82 is disposed on the axial angle measuring section. Below the 11th, the shaft angle measuring section 11 is sandwiched and leveled, and the upper hollow jig 81 and the lower hollow jig 82 are mutually magnetically attracted to each other.

The second aspect of the present invention is an optical film axis angle measuring method, which comprises the following steps:

(1) transferring the optical film 1 and forming the optical film 1 into an axial angle measuring section 11, as shown in Figs. 1 and 2, the present invention transmits a batch from left to right (or from right to left) The continuous optical film 1, at the position of the optical film 1 to measure the axial angle 13 stops the transmission, so that the optical film 1 at this position 13 forms an axial angle measuring section 11;

(2) sequentially passing a light ray 51 through a rotary polarizer 4, the axial angle measuring section 11 and a illuminating measuring device 3, as shown in Figs. 1 and 2, the illuminating measure of the present invention When the device 3 and the rotary polarizer 4 measure the axial angle of the optical film 1 at the position 13, the light ray 51 is first used to pass the rotary polarizer 4, the axial angle measuring segment 11 and the illuminating metric Measuring device 3, wherein the rotary polarizer 4 first filters out light in a specific direction, and then the light 51 passes through the shaft angle measuring segment 11 and then is directed to the photometric measuring device 3;

(3) Rotating the rotary polarizer 4 to record the rotation angle of the rotary polarizer 4 when the illumination measuring device 3 measures the minimum illumination, as shown in FIGS. 1 and 2, the present invention After the light ray 51 passes through the axial angle measuring section 11 and is directed to the illuminating measuring device 3, the rotating polarizing mirror 4 starts counterclockwise rotation (or clockwise rotation) from its starting angle, and the illuminating measurement The illuminance measured by the device 3 will also start to decrease until the illuminance measured by the illuminating device 3 is the lowest, and the angle at which the rotary polarizer 4 is rotated can be recorded as the optical film 1 The shaft angle of 13 at this position.

To measure the axial angle of the optical film 1 at the next position 13, the illumination measuring device 3 and the light ray 51 can be turned off first, and the rotary polarizer 4 is rotated back to the starting angle, and then The optical film 1 is transferred to the next position 13, and then the above steps are repeated, so that the axial angle of the optical film 1 at different positions 13 can be measured. Since the present invention can automatically measure the axial angle of the optical film 1 at different positions 13 by using the photometric measuring device 3 and the rotary polarizer 4, a high-precision optical film axis angle can be quickly measured.

As shown in Figs. 1 and 2, the optical film 1 described above can be transported by a transport device 2.

The transport device 2 can wind the optical film 1 by a roll-out reel 21, and wind the optical film 1 by a winding reel 22, and the optical film 1 is wound on the reel 21 and the optical film 1 The shaft angle measuring section 11 is formed between the winding reels 22, and the winding reel 21 and the winding reel 22 can be rotated by a servo motor (not shown) or driven by a servo motor and a gear set (not shown). Rotate.

As shown in Fig. 5, in the above method, before the optical film 1 is transferred, the end edge 12 of the optical film 1 may be further aligned.

The end edge 12 of the optical film 1 is aligned by an alignment device 6 and an image capturing device 7 by disposing the alignment device 6 on the left side of the winding reel 22 to make the optical film 1 The alignment of the optical film 1 is performed by the image capturing device 7 being disposed on the upper side of the alignment device 6. The alignment device 6 can be a flat plate, and the image capturing device 7 can be a camera. Before measuring the axial angle of the optical film 1, the end edge 12 of the optical film 1 may be first flattened, and then the alignment device 6 and the image capturing device 7 are used to align the end edges 12 of the optical film 1. Then, the entire batch of optical film 1 has its common reference to measure the absolute axis angle.

As shown in FIGS. 1 and 2, the light ray 51 can be transmitted by a light-emitting device 5.

As shown in FIG. 6 , in the above method, the light ray 51 may be further included before the rotation of the rotary polarizer 4 , the axial angle measuring section 11 and the illuminating measuring device 3 . Segment 11.

The leveling the shaft angle measuring section 11 can be performed by a hollow leveling device 8 so that the illuminating measuring device 3, the rotating polarizing mirror 4 and the illuminating device 5 can pass through the hollow leveling device 8 The exact shaft angle is measured.

The hollow leveling device 8 can be disposed on the upper surface of the shaft angle measuring section 11 by an upper hollow clamp 81, and is disposed under the shaft angle measuring section 11 by a lower hollow clamp 82 for clamping. The shaft angle measuring section 11 is leveled, and the upper hollow clamp 81 and the lower hollow clamp 82 are mutually magnetically attracted to each other.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of the invention is defined by the scope of the following claims.

1. . . Optical film

11. . . Axis angle measurement section

12. . . End edge

13. . . Location

2. . . Conveyor

twenty one. . . Roll out the reel

twenty two. . . Winding reel

3. . . Photometric measuring device

4. . . Rotary polarizer

5. . . Illuminating device

51. . . Light

6. . . Alignment device

7. . . Image capture device

8. . . Hollow leveling device

81. . . Upper hollow clamp

82. . . Lower hollow clamp

Figure 1 is a schematic illustration of a transfer optical film in accordance with an embodiment of the present invention.

Figure 2 is a schematic view showing the axial angle of an optical film according to a specific embodiment of the present invention.

Figure 3 is a schematic view showing the relationship between the linear position of the optical film and the axial angle of the embodiment of the present invention.

Figure 4 is a schematic view showing the relationship between the plane position of the optical film and the axial angle of the embodiment of the present invention.

Figure 5 is a schematic illustration of alignment of the edges of an optical film in accordance with an embodiment of the present invention.

Fig. 6 is a schematic view showing the angle measuring section of the flattening optical film shaft according to a specific embodiment of the present invention.

1. . . Optical film

11. . . Axis angle measurement section

13. . . Location

2. . . Conveyor

twenty one. . . Roll out the reel

twenty two. . . Winding reel

3. . . Photometric measuring device

4. . . Rotary polarizer

5. . . Illuminating device

51. . . Light

Claims (13)

An optical film shaft angle measuring system comprises: a conveying device for conveying the optical film and forming the optical film to form an axial angle measuring section; a hollow leveling device for leveling the shaft angle by a magnetic force; an illuminance a measuring device disposed outside a first surface of the axial angle measuring segment; a rotary polarizer disposed outside a second surface of the axial angle measuring segment; and a light emitting device disposed on the And outside the second side of the axis angle measuring segment, and transmitting a light sequentially through the rotary polarizer, the axis angle measuring segment and the photometric measuring device. The system of claim 1, wherein the hollow leveling device has an upper hollow clamp and a lower hollow clamp, the upper hollow clamp being placed on the first side of the axial angle measuring section, the lower A hollow clamp is placed over the second side of the shaft angular measurement section to clamp and level the axial angle measurement section. The system of claim 1 or 2, wherein the conveying device has a take-up reel and a take-up reel, the take-up reel unwinds the optical film, and the take-up reel winds the optical film, An optical film forms the axial angle measuring segment between the take-up reel and the take-up reel. For example, the system described in claim 1 or 2 further includes: An alignment device disposed outside one side of the conveyor to align one end of the optical film; and an image capture device disposed outside one side of the alignment device to view the optical film Alignment of the edges. An optical film shaft angle measuring method, comprising the steps of: transmitting the optical film and forming the optical film into a one-axis angular measuring section; and magnetically leveling the axial angle measuring section by a hollow leveling device; Recording the rotating polarized light through a rotating polarizer, the axis angle measuring segment and a illuminating measuring device; and rotating the rotating polarizing lens to measure the minimum illuminance by the illuminating measuring device The angle of rotation of the mirror. The method of claim 5, wherein the hollow leveling device has an upper hollow clamp and a lower hollow clamp, the upper hollow clamp being placed on a first side of the axial angle measuring section, the lower A hollow clamp is placed on a second side of the axial angle measuring section to clamp and level the axial angle measuring section. The method of claim 5, wherein the optical film is conveyed by a transfer device. The method of claim 7, wherein the conveying device Having a take-up reel and a take-up reel, the take-up reel unwinds the optical film, the take-up reel winds up the optical film, and the optical film forms the axis between the take-up reel and the take-up reel Angle measurement section. The method of claim 8, wherein before the transmitting the optical film, the method further comprises: aligning one end of the optical film. The method of claim 9, wherein the edge of the optical film is aligned by an alignment device and an image capture device, the alignment device being placed outside one side of the winding reel, Aligning the end edges of the optical film, the image capture device is placed outside one side of the alignment device to view the alignment of the end edges of the optical film. The method of claim 7, wherein before the transmitting the optical film, the method further comprises: aligning one end of the optical film. The method of claim 11, wherein the edge of the optical film is aligned by an alignment device and an image capture device, the alignment device being placed outside one side of the transfer device such that The end edges of the optical film are aligned, and the image capture device is placed outside one side of the alignment device to view the alignment of the end edges of the optical film. The method of claim 5, wherein the light is transmitted by a light emitting device to sequentially pass the light through the rotary polarizer, the axial angle measuring segment and the photometric measuring device.