TW201640203A - Photo alignment apparatus - Google Patents

Abstract

The present invention discloses a photo alignment apparatus. The photo alignment apparatus according to one embodiment of the present invention treats an alignment film used for aligning liquid crystal in a non-contact manner; the photo alignment apparatus comprises: a light source part, in which LED elements are arranged to emit light, and a polarizing part used for controlling polarization, and is characterized in: in the light source part, the LED elements are arranged in multiple lines to form LED straight light; in the polarizing part, a plurality of polarizers are arranged in a line, and multiple beams of the LED straight light are incident into the polarizing part at an interval so as not to interfere with each other.

Description

Light alignment device

The present invention relates to a light alignment device, and more particularly to a light alignment device using an LED (Light Emitting Diode).

In order to align the alignment film of the alignment film glass of the liquid crystal display device in a predetermined direction, the optical alignment device irradiates the alignment film with a polarized light beam having a predetermined wavelength to perform alignment, instead of mechanically rubbing the friction roller in contact with the alignment film. (rubbing) way. For the light alignment, a UV lamp such as a high-pressure mercury lamp or a metal halide lamp that emits light of a predetermined intensity is used.

Conventional UV lamps require an optical system for limiting wavelengths to prevent illumination of light of unnecessary wavelengths. However, due to the optical system, the light transmittance is affected, so that the light energy reaching the alignment film is reduced, and the price of the lamps is equivalent. expensive. In addition, in conventional UV lamps, it is necessary to provide a complicated mirror to control the diffused light with respect to the optical axis of the lamp. In order to achieve high precision of the alignment state, the incident light needs to be perpendicular to the alignment film, but it is difficult for the mirror of the UV lamp that focuses the diffused light to perform a wide range of illumination to extract only the light that is normally incident. And the conventional on-off of UV lamps requires a large amount of waiting time.

Technical problem to be solved

Accordingly, the present invention has been made to solve the above problems, and an object thereof is to provide a light alignment device having a simple device structure.

Other objects of the present invention will become more apparent from the embodiments described below.

Ways to solve technical problems

The battery negative pressure detecting system disclosed in the present invention has at least one battery forming device and a detecting fixture. Each of the battery forming devices has a plurality of negative pressure lines, and the battery forming device receives the first control command through the communication network, and executes the detecting program according to the first control command. The test fixture has a plurality of detection interfaces for selectively detecting the battery formation device. In the detection program, each negative pressure line of the battery formation device is connected to a detection interface, and the battery formation device suctions the detection interface through the negative pressure line, so that the detection fixture produces a measurement result. The test fixture transmits the measurement result to the battery formation device.

The present invention provides a light alignment device that processes an alignment film for aligning liquid crystals in a non-contact manner, the light alignment device including a light source portion in which LED elements are arranged to illuminate light, and a polarization portion for performing polarization control. In the light source unit, the LED elements are arranged in a plurality of rows to form LED linear light. In the polarizing unit, a plurality of polarizing plates are arranged in a line, and the plurality of LED linear lights are incident on the polarizing portion at intervals that do not interfere with each other.

The optical alignment device to which the present invention relates may have one or more of the following embodiments. For example, in one embodiment, multiple bundles of LED linear light having peak wavelengths different from each other are selected and configured to control the illumination intensity.

In one embodiment, the LED elements are individually controlled such that the amount of light received by the alignment film at the lower portion of the polarizer from the multi-beam LED linear light is uniform.

In an embodiment, the plurality of LED linear lights intersect each other when transmitting the polarized portion.

In one embodiment, the illumination angles of the plurality of LED linear lights are symmetrical with each other to form a continuous illumination concentration portion when transmitting the polarization portion.

In one embodiment, the light source portion is provided with a lens that causes the light to be diffused or linear.

In one embodiment, the polarizing portion includes a polarizing plate, a gap is formed between the polarizing plates, and a light shielding member is disposed at a lower portion of the gap to prevent transmission of the LED light.

In an embodiment, the width of the light shielding member is less than or equal to 4.5 mm.

In an embodiment, the polarizing portion includes a polarizing plate having a center of rotation not located at the center thereof, and is capable of adjusting an angle by rotation.

In an embodiment, the centers of rotation of adjacent polarizing plates are disposed on opposite sides of each other.

In one embodiment, the reaction time of the alignment film is controlled by adjusting the vertical height of the photoalignment device relative to the alignment film.

In one embodiment, a fluorescent sensor for receiving fluorescence generated when the linear light of the LED reaches the alignment film is provided, and the alignment of the alignment film is measured by a fluorescent sensor.

An optical alignment method according to an embodiment of the present invention is characterized in that LED linear light and a plurality of polarizing plates are used for optical alignment, and LED linear light is linear state light formed by a plurality of LED elements, in order to linearly light the LED Polarization control is performed, a plurality of polarizing plates are arranged in a line, and a plurality of LED linear lights in the form of parallel light are incident on the plurality of polarizing plates at intervals that do not interfere with each other.

Effect of the invention

The invention can provide a light alignment device with a simple structure.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The present invention can be variously modified, and various embodiments can be made. The specific embodiments are exemplified and described in detail below. However, it is to be understood that the invention is not limited to the specific embodiment, but all modifications, equivalents and alternatives are included within the scope of the spirit and scope of the invention. In the description of the present invention, if it is considered that the specific description of the related art may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terminology used in the description is for the purpose of illustration and description A singular representation includes the plural unless the context clearly dictates otherwise. In the present application, terms such as "including" or "having" are used to indicate that there are any features, digits, steps, acts, components, components or combinations thereof described in the specification, and do not exclude the presence or addition of one or The possibility of multiple other features, digits, steps, actions, components, components, or combinations thereof.

The terms first, second, etc. may be used to describe various constituent elements, but the constituent elements should not be limited by the terms. The terms are only used to distinguish one component from another.

In the following, the embodiments of the present invention will be described in detail with reference to the drawings, and the same reference numerals will be given to the same or corresponding components, and the repeated description thereof will be omitted. .

1 and 2 are perspective views illustrating an optical alignment device 100 according to an embodiment of the present invention, wherein FIG. 1 illustrates a state in which one bundle of LED linear light 122 is output, and FIG. 2 illustrates a state in which three LED linear light beams 122 are output. . 3 is a plan view showing an LED module 120 in which an LED (Light Emitting Diode) element 112 is arranged in the optical alignment device 100, and FIG. 4 is a view in which a lens 116 is disposed under the LED element 112 to form an LED linear light 122. Schematic diagram of the state. In addition, FIG. 5 is a schematic view illustrating the degree of light collection according to the interval a between the LED element 112 and the lens 116.

1 to 5, an optical alignment device 100 according to an embodiment of the present invention includes a light source unit 110, and includes a plurality of LED elements 112 for illuminating LED linear light 122 in a linear state; and a polarizing unit 130 having alignment The plurality of polarizing plates 132 are arranged in a row to control the polarization of the LED linear light 122; the protective glass sheet 150 is disposed between the polarizing portion 130 and the alignment film glass 160 on which the alignment film 162 is formed.

In the optical alignment device 100, the plurality of LED linear lights 122 formed by the light source unit 110 are incident on the polarizing plate 132 and then polarized to align the alignment film 162. The light source unit 110 uses the plurality of LED elements 112 as a light source. Compared with the conventional UV lamp, the light source unit 110 based on the LED element 112 has an advantage in that energy consumption is low, and it is easy to open-close (on-off), and the temperature is rapidly increased in a short time after lighting. Further, the light source portion 110 based on the LED element 112 can be formed to be long (for example, 1 m), and therefore, can correspond to the alignment film glass 160 having a large area, and does not need to have a cold mirror, a mirror, etc., and therefore, Can simplify the structure.

The light source unit 110 may include at least one LED module 120 including a plurality of LED elements 112. The LED modules 120 may be arranged in a row or in two rows. The light source unit 110 according to the present embodiment is exemplified by the LED modules 120 arranged in three rows. Each LED module 120 can be independently controlled.

The plurality of LED modules 120 can output LED light of different wavelengths. For example, the peak wavelength of the LED light output by one LED module 120 may be 365 nm, and the peak wavelength of the LED light output by the other LED module 120 may be 385 nm, and the peak wavelength of the LED light output by the other LED module 120 may be It is 395nm. In this way, each of the LED modules 120 can output LED light of different wavelengths, thereby being able to output LED light of a wavelength that optimizes the alignment characteristics of the alignment film 162.

It is exemplified that the LED module 120 includes one plate 114. However, a plurality of plates 114 may be provided. In this manner, the LED module 120 can be provided with a plurality of plates 114 such that the output intensity, wavelength, and the like of the LED elements 112 mounted on the board 114 are different from each other.

The optical alignment device 100 according to the present embodiment is characterized in that the plurality of LED linear lights 122 are incident on the polarization portion 130 in which a plurality of the polarizing plates 132 are arranged at intervals without interfering with each other. As described above, by transmitting the plurality of LED linear lights 122 in a single line optical system, it is possible to prevent an alignment error from occurring on the irradiation surface, and it is possible to improve the productivity by using a plurality of LED linear lights.

Referring to FIG. 4, a lens 116 is disposed at a lower portion of each of the LED modules 120. The lens 116 condenses or forms the LED light output from the LED element 112 into parallel light. The LED light is formed as LED linear light 122 through lens 116, or is formed as LED linear light 122 by itself without passing through lens 116. The LED linear light 122 is a long rectangular light beam continuously formed in a direction perpendicular to the moving direction of the stage 170 (the direction of the arrow in FIGS. 1 and 2). The length of the LED linear light 122 can be formed to the extent that it can be entirely contained in the plurality of polarizing plates 132 arranged in a line.

The lens 116 may be a rod lens that is circular in cross section (refer to FIGS. 4 and 5) and formed long. The rod lens may be disposed along the longitudinal direction of the LED module 120, and as shown in FIG. 4, the LED light corresponding to the diffused light is formed into the LED linear light 122 in the form of parallel light.

Of course, the lens 116 according to the present embodiment may be not only a rod lens, but may be of any kind as long as the LED light output from the LED element 112 can be condensed or formed into parallel light.

Referring to FIG. 5, the LED linear light 122 can be formed as diffused light or parallel light by adjusting the interval a between the LED element 112 and the rod lens. That is, as shown in FIG. 4, the spacing between the LED element 112 and the rod lens can be reduced such that all of the LED light output from the LED element 112 is incident on the rod lens 116 to form LED linear light 122 in the form of parallel light. . Further, as shown in FIG. 5, the interval a between the LED element 112 and the rod lens 116 can be made slightly larger, so that a part (for example, 20%) of the LED light output from the LED element 112 is not incident on the rod shape. The lens 116 is instead output as diffused light, with the remaining LED light (e.g., 80%) being incident on the rod lens 116 to form LED linear light 122 in the form of parallel light.

Of course, the light source portion 110 can form the LED linear light 122 in the form of diffused light without using the lens 116. Further, even in the LED element 112 disposed in the same LED module 120, the LED element 112 including the lens 116 and the LED element 112 not including the lens 116 may be mixed.

FIG. 6 is a schematic view illustrating a state in which the LED linear light 122 in the form of diffused light output from the LED element 112 reaches the alignment film 162.

Referring to Figure 6, LED linear light 122 in the form of diffused light can reach alignment film 162. It is possible to form the LED linear light 122 in the form of diffused light having a total irradiation width c which is twice or less the width a of the irradiation concentrated portion 126, and the total irradiation width c is the width of the effective region until the irradiation intensity reaches 5% of the average value. Therefore, the following relationship is established between the total width c and the width b of the remaining portion after the width a of the irradiation concentrated portion 126 is removed: a + 2b = c 2a ≥ c

FIG. 7 is a schematic view illustrating a state in which the LED linear light 122 crosses through the polarizing plate 132.

When the light source unit 110 illuminates only the LED linear light 122 in the form of parallel light, although the directional performance of light is improved, the amount of accumulated light is lowered, so that mass productivity is lowered. In order to solve these problems, as illustrated in FIG. 7 , the LED linear light 122 in the form of diffused light output from the plurality of LED modules 120 may pass through the polarizing plate 132 and cross each other, thereby increasing the irradiation area, particularly increasing in the center. The size of the illumination concentration portion 126.

FIG. 8 is a schematic view illustrating a state in which an inclination angle is formed in the LED module 120 to intersect the LED linear light 122.

Referring to FIG. 8, in order to further concentrate the LED linear light 122 in the form of diffused light output from the three LED modules 120, the LED modules 120 on both sides are obliquely arranged bilaterally symmetrically. Thereby, the area of the irradiation concentrated portion 126 and the amount of concentrated light can be increased.

Hereinafter, the polarizing unit 130 of the optical alignment device 100 according to the present embodiment will be described with reference to FIGS. 1 to 2 and 9 to 10.

FIG. 9 is a plan view illustrating a polarization portion 130 of the optical alignment device 100 illustrated in FIG. 1 , and FIG. 10 is a front view of the polarization portion 130 illustrated in FIG. 9 .

9 to 10, the polarization portion 130 performs polarization control on the LED linear light 122 output from the light source portion 110, including: a plurality of polarizing plates 132 arranged in a line; and a light blocking member 140 located between the polarizing plates 132 The vertical lower portion of the gap 138.

The LED linear light 122 output from the light source unit 110 is transmitted through the polarizing plate 132 and is polarized in a specific direction. The polarizer 132 may use a Brewster polarizer or a wire grid polarizer.

The Brewster polarizer is a polarizer composed of a dielectric multilayer film, and is divided into a p-wave polarization component and an s-wave polarization component by the Brewster angle, and a high extinction ratio (polarization ratio) can be set. The wire grid type polarizing plate can arbitrarily change the wavelength band by the gap of the metal wire (gate) disposed inside it. Wire grid type polarizers can be fabricated by a simple process of pattern transfer.

The plurality of polarizing plates 132 are arranged in a line to form a predetermined gap 138 therebetween. By forming the gap 138 between the polarizing plates 132, the respective polarizing plates 132 can be rotated to adjust the polarization direction. Both ends of the polarizing plate 132 are provided with a support member 134.

The light shielding member 140 is disposed at a lower portion of the gap 138 where the polarizing plate 132 is not disposed to prevent the unpolarized LED linear light 122 from reaching the alignment film. The light shielding member 140 is formed of a material such as a light-impermeable metal, has a width larger than the width of the gap 138, and is longer than the polarizing plate 132. The width of the light blocking member 140 may be less than or equal to 4.5 mm in consideration of the transmission of the LED linear light 122.

The light shielding member 140 is located at a lower portion of the polarizing plate 132 with a predetermined interval therebetween in order to prevent the polarizing plate 132 from being damaged by the light shielding member 140.

A protective glass piece 150 is provided at a lower portion of the polarizing portion 130. The cover glass 150 is used to prevent vapor which is generated by the irradiation of the alignment film 162 from adhering to the polarizing plate 132. The cover glass 150 may be formed of a material such as glass that transmits the LED linear light 12. The cover glass 150 may be provided with one or more.

FIG. 11 is a plan view illustrating a state before the polarizing plate 132 of the polarizing portion 130 is adjusted, and FIG. 12 is a plan view illustrating a state after the polarizing plate 132 of FIG. 11 is adjusted.

Referring to FIGS. 11 and 12, each of the polarizing plates 132 may be rotated by a predetermined angle around the rotation center 136. The rotation center 136 may be formed on the support member 134 for supporting both end portions of the polarizing plate 132 instead of being formed at the center of the polarizing plate 132. As shown in FIG. 11, when the polarizing plates 132 are not arranged in the desired direction, the respective polarizing plates 132 may be rotated centering on the rotation center 136, thereby adjusting the polarizing plate 132 as shown in FIG.

The center of rotation 136 of the adjacent polarizing plate 132 is disposed at the end on the opposite side. This is to prevent the polarizing plates 132 from colliding due to the small gap 138 between the polarizing plates 132.

The optical alignment device 100 according to the present embodiment includes the light source unit 110 and the polarization unit 130, and does not separately include a mirror (not shown) for collecting light. Therefore, the optical alignment device 100 has a simple structure and can adjust the height with respect to the alignment film 162. In this manner, the irradiation intensity of the LED linear light 122 reaching the alignment film 162 can be adjusted by adjusting the height of the light alignment device 100 with respect to the alignment film 162, and therefore, the light optimized for the alignment characteristics of the alignment film 162 can be irradiated.

The optical alignment device 100 according to the present embodiment may be provided with a fluorescent sensor (without reference numerals) for receiving the fluorescent light generated when the LED linear light 122 reaches the alignment film 162. Since the optical alignment device 100 according to the present embodiment uses the LED element 112, the fluorescence sensor does not require a specific wavelength, and the alignment degree can be measured only by receiving the fluorescence.

The optical alignment device 100 according to the present embodiment is provided with a stage 170 for placing the alignment film glass 160, and the stage 170 can move the alignment film glass 160 in the direction of the arrow in FIG. The platform 170 and its driving method are conventional techniques, and therefore, a detailed description is omitted.

The present invention has been described with reference to an embodiment of the present invention. However, it will be understood by those skilled in the art that various modifications of the invention can be made without departing from the scope of the invention and the scope of the invention. And changes.

100‧‧‧Light alignment device
110‧‧‧Light source department
112‧‧‧LED components
116‧‧‧ lens
120‧‧‧LED module
122‧‧‧LED linear light
130‧‧ ‧Polarization
132‧‧‧Polarizer
140‧‧‧ shading members
150‧‧‧Stained glass
160‧‧‧Alignment film glass

1 and 2 are perspective views illustrating an optical alignment device according to an embodiment of the present invention. 3 is a plan view showing an LED module in which an LED (Light Emitting Diode) element is arranged in the optical alignment device illustrated in FIG. 2 . 4 is a schematic view illustrating a state in which a lens is disposed at a lower portion of the LED element to form a linear light of the LED. FIG. 5 is a schematic view illustrating the degree of light collection according to the interval between the LED element and the lens. FIG. 6 is a schematic view illustrating a state in which linear light of LEDs in the form of diffused light reaches an alignment film. Fig. 7 is a schematic view showing a state in which a plurality of LEDs linear light passes through a polarizing plate. FIG. 8 is a schematic view illustrating a state in which an inclination angle is given to an LED module to cause linear light of the LEDs to intersect. Fig. 9 is a plan view illustrating a polarization portion of the optical alignment device illustrated in Fig. 1 . Fig. 10 is a front elevational view of the polarizing portion illustrated in Fig. 9. FIG. 11 is a plan view illustrating a state before the polarizing plate of the polarizing portion is adjusted. Fig. 12 is a plan view illustrating a state after the polarizing plate of Fig. 11 is adjusted.

100‧‧‧Light alignment device

110‧‧‧Light source department

112‧‧‧LED components

116‧‧‧ lens

120‧‧‧LED module

122‧‧‧LED linear light

130‧‧ ‧Polarization

132‧‧‧Polarizer

140‧‧‧ shading members

150‧‧‧Stained glass

160‧‧‧Alignment film glass

Claims (13)

A light alignment device that processes an alignment film for aligning liquid crystals in a non-contact manner, the light alignment device including a light source portion in which LED elements are arranged to illuminate light, and a polarization portion for performing polarization control, wherein In the light source unit, the LED elements are arranged in a plurality of rows to form LED linear light. In the polarizing portion, a plurality of polarizing plates are arranged in a line, and the plurality of LED linear lights are incident on the polarizing portion at intervals that do not interfere with each other. The optical alignment device according to claim 1, wherein the plurality of LED linear lights having different peak wavelengths are selected and arranged to control the irradiation intensity. The optical alignment device according to claim 2, wherein the LED element is individually controlled such that the amount of light received by the alignment film passing through the lower portion of the polarizing portion from the plurality of LED linear lights is uniform. The optical alignment device according to claim 1, wherein the plurality of bundles of the LED linear light cross each other when transmitting the polarizing portion. The optical alignment device according to claim 1, wherein the plurality of beams of the LED linear light are symmetrical to each other, thereby forming a continuous irradiation concentrating portion when the polarizing portion is transmitted. The optical alignment device according to claim 1, wherein the light source unit includes a lens that forms the LED light into diffused light or linear light. The light alignment device according to claim 1, wherein the polarizing portion includes the polarizing plates, and a gap is formed between the polarizing plates, and a light shielding member is disposed at a lower portion of the gap to prevent transmission of LED light. The light alignment device according to claim 7, wherein the light shielding member has a width of 4.5 mm or less. The optical alignment device according to claim 1, wherein the polarizing portion includes the polarizing plates, the polarizing plates have a center of rotation not located at a center thereof, and are capable of adjusting an angle by rotation. The optical alignment device according to claim 9, wherein the centers of rotation of the adjacent polarizing plates are disposed on opposite sides of each other. The photo-alignment device according to claim 1, wherein the vertical height of the photo-alignment device relative to the alignment film is adjusted to control the reaction time of the alignment film. The optical alignment device according to claim 1, further comprising: a fluorescence sensor for receiving fluorescence generated when the linear light of the LED reaches the alignment film, and the fluorescence sensor is used to measure the alignment The degree of alignment of the film. A photo-alignment method comprising: performing optical alignment using LED linear light and a plurality of polarizing plates; the LED linear light is a linear state light formed by a plurality of LED elements; and the polarizing plates are arranged in a row and multi-beam The LED linear light is incident on the polarizing plates at intervals that do not interfere with each other to perform polarization control of the LED linear light.