KR100200357B1 - Measuring apparatus for light properties - Google Patents

Abstract

The present invention relates to an optical characteristic measuring apparatus for measuring optical characteristics of a liquid crystal display such as viewing angle, uniformity of luminance, and the like. Measured support means which is fixed vertically to one side of the support and the support manufactured to be able to adjust the distance on the upper part, and the mounting part can rotate in up, down, left and right directions about one point, and has an opening to allow the detachment of the workpiece on the mounting part. Vertically fixed to the other side of the support and the measuring unit on which the measuring unit is mounted at a position facing the central axis vertically, and having a jig for moving the measuring unit up, down, left, and right, It includes a control means for controlling the movement of up and down and left and right, control the screen on the measurement object, and receive and store the measured data from the measuring instrument. Therefore, the optical characteristic measuring apparatus according to the present invention represents an image to be measured by connecting the measuring liquid crystal panel with a computer, and displays the same image as that shown by the measuring liquid crystal panel on the outside of the shield box, so that the progress of the measurement is Since it is possible to set the angle and position of the liquid crystal panel repeated by the driving motor, it is possible to eliminate the difficulties in the conventional design, and to set the angle and position of the liquid crystal panel for measurement through data input to a computer. There is an effect that can realize a measurement with high reliability and stability.

Description

Optical characteristic measuring device

1 is a side view of the combined components of the optical characteristic measuring apparatus according to an embodiment of the present invention,

2 is a front view showing a control path with each component part of the optical characteristic measuring apparatus according to the embodiment of the present invention separated;

3 is a layout view illustrating a method of finding a measurement center point using the optical characteristic measuring apparatus according to the exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical characteristic measuring apparatus, and more particularly, to an optical characteristic measuring apparatus for measuring optical characteristics of a liquid crystal display such as a viewing angle, uniformity of luminance, and the like.

In general, a liquid crystal display device has a unique characteristic of having a viewing angle because a liquid crystal material is used in a method of displaying a screen. This refers to a characteristic in which an image looks changed according to the position of an observer who looks at the screen.

Therefore, when evaluating the optical characteristics of the liquid crystal display, it is essential to evaluate the characteristics of the viewing angle.

When the viewing angle of the liquid crystal display is measured, the viewing angles of the upper, lower, left, and right sides are determined according to the position of the observer's eye with the angle of viewing the liquid crystal display at the front as 0 °, and the correct optical characteristic value according to the position of the viewing angle. It is important to know and specify the viewing angle accurately.

The optical characteristic evaluation apparatus of the conventional liquid crystal display device fixes a liquid crystal panel vertically by using a supporter, determines a position to be measured, and fixes the measuring device horizontally. Next, while maintaining the same distance around the position to be measured while measuring the viewing angle while rotating the measuring device at regular intervals.

A plurality of positions are selected on the display panel to repeatedly fix the panel vertically and to fix the measuring device horizontally to measure luminance uniformity.

However, such a conventional optical characteristic measuring apparatus for a liquid crystal display device has a lot of difficulties in repeating precise operations to match various angles of a predetermined interval with respect to the same point of the display panel when measuring the viewing angle. In addition, when measuring luminance uniformity, it is inconvenient to meet the same conditions in consideration of the vertical and horizontal positions of the measuring device and the panel every time the various positions are moved to the display panel, and thus the measurement time becomes longer, thereby reducing the measurement efficiency. There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and to design an optical characteristic measuring apparatus that can more accurately evaluate the uniformity of luminance while increasing the accuracy of meeting the same conditions for the repeated angles in measuring the viewing angle. Is in.

Measurement object support means for an optical characteristic measuring device according to the present invention for achieving this object,

A first jig having an opening to allow the measurement object to be detached and equipped with a drive means for horizontal rotation capable of rotating the measurement object left and right,

A second jig having an opening to allow the first jig to be attached and detached, and a second rotation jig for mounting the first jig vertically and vertically to the left and right rotation axes.

It includes.

Mounting table for measuring instrument for optical properties measuring apparatus according to the present invention for achieving this object,

A first jig having a measuring unit capable of vertically mounting a measuring instrument and a vertical moving means capable of moving the measuring unit up and down, the first jig being vertically mounted, and moving the first jig in a horizontal direction Second jig equipped with movable left and right moving means

It includes.

Optical characteristics measuring apparatus according to the present invention for achieving this object, the support is made to enable the distance adjustment on the top,

A workpiece support means fixed to one side of the support and having an opening to rotate vertically and horizontally about a point with a mounting portion and an opening to allow detachment of a workpiece on the mounting portion;

It is fixed vertically to the other side of the support and having a measuring unit mounted on the measuring device in a position facing the vertical axis vertically having a jig for moving the measuring unit up, down, left and right,

Control means for controlling the up, down, left and right rotation of the mounting portion and the movement of the upper and lower left and right of the measuring unit, controlling the screen on the measurement object and receiving and storing the measured data from the measuring instrument

It includes.

Then, an embodiment of the optical characteristic measuring apparatus according to the present invention with reference to the accompanying drawings will be described in detail to be easily carried out by those skilled in the art.

1 is a side view of the combined components of the optical characteristic measuring apparatus according to an embodiment of the present invention.

As shown in FIG. 1, an optical characteristic measuring apparatus according to an exemplary embodiment of the present invention provides a shield box capable of shielding external light incident from the outside to simultaneously provide a measurement environment when measuring optical characteristics. 10) There is. The distance adjuster 20, which is used as one of the supports for adjusting the distance between two objects mounted on the upper surface of the shield box 10, is fixed horizontally. The liquid crystal panel 30 for measurement is fixed to one end of the distance adjuster 20 vertically, and the panel support 40 manufactured to be able to rotate the measurement liquid crystal panel 30 vertically and horizontally is attached vertically. have. An instrument support 50 which is movable up, down, left and right at the other end of the distance adjuster 20 is attached to the measuring stand 60, and a measuring instrument 70 is attached on the instrument support 50. . Here, the panel support 40 is one of the measurement object support means, and the instrument support 50 and the measurement stand 60 are an example of a measurement stand. A computer 80 is mounted on the distance adjuster 20 to transmit an electrical signal to the measurement liquid crystal panel 30 or to control the measuring device 70 and to read and store the accumulated data.

Each component of the optical characteristic measuring apparatus according to the embodiment of the present invention is as follows in more detail.

2 is a front view showing a control path with each component part of the optical characteristic measuring apparatus according to the embodiment of the present invention separated.

As shown in FIG. 2, first, the panel support 40, which is vertically attached to one end of the distance adjuster 20 (see FIG. 1),

In order to rotate the fixed liquid crystal panel 30 to the left or right, in the horizontal direction, a horizontal rotation drive motor 42 including a horizontal rotation shaft 41 is attached to the lower center and has an opening in the upper portion. Support 43,

In order to rotate the measurement liquid crystal panel 30 and the first support 43 up and down, that is, in the vertical direction, the first support 43 is fixed by using two vertical rotation axes 44 outside both sides of the first support 43. In addition, a vertical rotation drive motor 45 is attached to one vertical rotation shaft 44 of the two vertical rotation shaft in the center of the side and consists of a second support 46 having an opening at the top.

Next, the measuring table 60 attached vertically to the other end of the distance adjuster 20 (refer to FIG. 1) is connected to the instrument support 50 on which the measuring device 70 and the measuring device 70 are mounted. In order to move up and down, in order to move in the vertical direction, the vertical movement first measuring table 62 having the vertical moving drive motor 61 attached thereto and the measuring device 70 on which the measuring device 70 is mounted are left and right, that is, In order to move in a horizontal direction, it is comprised by the 2nd measuring base 64 for horizontal movements with the drive motor 63 for horizontal movements attached to one end.

Finally, the computer 80 mounted on the upper part of the distance adjuster 20 (see FIG. 1) includes a horizontal rotation drive motor 42 and a vertical unit attached to the measuring device 70 and the panel support 40. It is electrically connected with the drive motor for rotation 45, the drive motor 61 for horizontal movement, and the drive motor 63 for horizontal movement which are attached to the measurement base 60, respectively.

The computer 30 may control the respective driving motors 42, 45, 61, and 63 described above to determine the position of the measuring device 70 and the angle of the liquid crystal panel 30 for measurement according to the input data. The program which can store data in the uniformity of the viewing angle and brightness measured with respect to each position and angle of the measurement liquid crystal panel 30 through the apparatus 70 is built-in. And on the computer 80, the monitor 90 which can display the same image shown by the liquid crystal panel 30 for a measurement is mounted. The computer 30 and the monitor 90 may be designed outside the shield box 10 described above, and may be designed inside and outside the shield box 10, respectively.

The manufacturing method of the optical characteristic measuring apparatus according to the embodiment of the present invention is made as follows.

First, an opening having a size sufficient to allow detachment of the measurement liquid crystal panel 30, which may have various sizes, may be rotated about a horizontal rotation axis 41 passing through the center of the measurement liquid crystal panel 30. The first support 43 is manufactured by attaching the drive motor 42 for horizontal rotation to the center.

Mounting the drive motor 45 for the vertical rotation so as to rotate about the vertical rotation axis 44 passing through the center of the liquid crystal panel 30 for measurement and having an opening of sufficient size to allow the first support 43 to be detached After the second support 46 is manufactured, the panel support 40 is manufactured by combining the first support 43 and the second support 46 so as to have a central axis of one point during vertical rotation.

Here, the horizontal rotation drive motor 42 and the vertical rotation drive motor 45 is used to change the rotation control angle to 0.01 ~ 6 ° for use even in fine rotation.

Next, a first measuring table 62 equipped with a vertical movement motor 61 capable of moving the support 50 on which the measuring device 70 is mounted in the vertical direction is manufactured.

The first measuring stand 62 is mounted to be perpendicular to the central axis when the first supporting stand 43 and the second supporting stand 46 are rotated, and the first measuring stand 62 can be moved in the horizontal direction. The horizontal moving drive motor 63 is attached to the second measuring stand 64 to complete the measuring stand 60.

Subsequently, the distance between the first support 42 and the second support 44 is adjusted to be perpendicular to the central axis of the rotation, and at the same time, the distance between the measurement liquid crystal panel 30 and the measurement platform 60 are mounted so as to be perpendicular. Install the adjuster (20).

Finally, the computer 30 is electrically connected to each of the drive motors 42, 45, 61, and 63 and the monitor 90 described above using an interface. Thus, it is possible to determine the position of the measuring device 70 and the angle of the liquid crystal panel 30 for measurement according to the input data, and measure each position and angle of the liquid crystal panel 30 for measurement through the measuring device 70. The program is embedded in the computer 80 so that the data on the uniformity of the viewing angle and the luminance uniformity can be read from the measuring instrument 70. And the shield box 10 is installed so that all measurements are made in the dark room, and the monitor 90 is installed outside the shield box 10 so that the progress of the measurement can be seen from the outside.

In the optical characteristic measuring apparatus according to the present invention, a measurement image is displayed on a liquid crystal panel by using a graphic board of a computer, and a center axis of up, down, left, and right rotations is assigned to the computer through an input means, and a measurement position is specified on the panel. . The computer then controls the drive motor through the interface to rotate or move the liquid crystal panel in any direction along the determined central axis, while the measuring device measures optical characteristics such as viewing angle or luminance uniformity for each angle or position. To store data on the optical characteristics on a computer.

The method for finding a measurement center point to be measured using the optical characteristic measuring apparatus according to the embodiment of the present invention is as follows.

3 is a layout view illustrating a method of finding a measurement center point using the optical characteristic measuring apparatus according to the exemplary embodiment of the present invention.

As shown in FIG. 3, the measuring device 70 has a predetermined distance from the measuring liquid crystal panel 30 perpendicular to the position to be measured, and the laser 100 is connected to one side of the measuring device 70. The other side is connected to the mirror or photodetector (photodetector) (200). The laser 100 and the mirror or photodetector 200 form an angle of 45 ° with respect to the vertical, respectively. Here, a reflective film (not shown) is attached to the position to be measured.

The method for finding the measurement center point emits light at a position to be measured by the laser 100. Then, the laser light incident due to the reflective film attached to the liquid crystal panel 30 for measurement is reflected and reaches the mirror or photodetector 2 00. The laser light arriving at the mirror or photodetector 200 is reflected back to the measurement liquid crystal panel 30. Here, the measuring device 70 will measure only one point where the laser light is reflected if the liquid crystal panel 30 for measurement is mounted vertically up and down and left and right, and two or more if not mounted vertically up and down and left and right. The point is measured.

Therefore, the optical characteristic measuring apparatus according to the present invention can display an image to be measured by connecting the measuring liquid crystal panel with a computer, and displays the same image as that shown by the measuring liquid crystal panel on the outside of the shield box. Known from the outside, the angle and position of the liquid crystal panel that is repeated by the drive motor can be eliminated, eliminating the difficulties in the conventional design, and setting the angle and position of the liquid crystal panel for measurement through data input to a computer Therefore, there is an effect that can realize a measurement with high reliability and stability.

Claims (6)

A first jig having an opening to allow the measurement target to be detached and a horizontal rotation driving means capable of rotating the measurement target to the left and right, and an opening to allow the first jig to be detachable from the first jig. And a second jig mounted with a vertical rotation drive means perpendicular to the left and right rotation shafts. The measuring object supporting means for the optical characteristic measuring device according to claim 1, wherein the rotation control angle of the horizontal rotating drive means and the vertical rotating drive means is 0.01 to 6 °. A first jig in which a measuring unit can be mounted vertically and a vertical moving means capable of moving the measuring unit up and down, the first jig is vertically mounted, and the first jig is moved in a horizontal direction A mounting table for measuring instrument for optical characteristics measuring device comprising a second jig equipped with left and right moving means. A support made to adjust the distance on the upper part, fixed to one side of the support vertically, the mounting part can be rotated up and down and left and right about a point about the central axis, and the measurement has an opening to allow the detachable of the workpiece to the mounting part Mounting means for the measuring device having a measuring unit is fixed to the other side of the support, the support vertically and the measuring unit is mounted in a position facing the vertical axis vertically and having a jig capable of moving the measuring unit up and down, left and right, the mounting portion And control means for controlling up, down, left, right, up, down, left, and right movements of the measuring unit, controlling a screen on the measurement object, and receiving and storing the measured data from the measuring instrument. The optical characteristic measuring apparatus of claim 4, further comprising: a light shielding means to block light from the outside when measuring the optical characteristics of the measured object using the measuring object, the support, the measuring object support means, the mounting means for the measuring instrument, and the control means. . 6. The apparatus as claimed in claim 5, further comprising a second measurement object and control means having the same function as the measurement object and the control means and electrically connected to the measurement object and the control means and located outside the light shielding means.