TWI382406B - Optical disk with cholesteric liquid display label and method for labeling optical disk - Google Patents

Description

Optical disc with cholesterol liquid crystal display label and method for labeling optical disc

The present invention relates to a disc for displaying a label using a cholesteric liquid crystal and a method for labeling the disc.

The development of optical disc labels has been mainly divided into print and laser writing. The printed label is attached to the surface of the disc after passing the label through the printer output pattern. The cost of a printed label is low, but an additional printing device is required, and the ink used for the label and printing is less preservative. The laser-written optical disc label attaches the photoreactive material to the surface of the optical disc and writes the pattern through the related software and hardware, for example, by using a laser read/write head of the optical disc player.

The laser-written optical disc label can not be adjusted in shape or size according to the user's preference, and only the written pattern can be adjusted, and the currently mass-produced product can only write a monochrome pattern, and cannot be gray scale or The writing of a color pattern. Although the laser-written optical disc label has better shelf retention, it is more expensive to use. Both print-type and laser-written optical disc labels cannot have the advantages of high storage and low cost at the same time, and both are write-once optical disc labels, which cannot be repeatedly written, and are not convenient to use, and are not Environmentally friendly.

The invention provides an optical disc having a cholesteric liquid crystal display label, comprising: a disc; and a cholesteric liquid crystal display label disposed on a surface of the optical disc.

The invention also provides a method for marking an optical disc, comprising the steps of: providing a disc; setting a cholesteric liquid crystal display label on the surface of the optical disc to form a disc having a cholesteric liquid crystal display label; and illuminating with light Or at least one pattern is written on the label by means of light irradiation simultaneously applying a voltage.

Embodiments of the present invention provide a method of displaying a label disc using a cholesteric liquid crystal display. The manner of manufacture and the manner of use of the various embodiments are described in detail below with reference to the drawings. Wherein, the same component numbers as used in the drawings denote the same or similar components. In the drawings, the shapes and thicknesses of the embodiments may be impractical for clarity and convenience of description. While the following description is specifically directed to the various elements of the device of the present invention or the integration thereof, it is noted that the above-described elements are not particularly limited to those shown or described, but may be those skilled in the art. The various forms obtained, in addition, when a layer of material is located on another layer or substrate, may be directly on its surface or otherwise interposed with other intervening layers.

The cholesteric liquid crystal display label of the present invention has flexibility, can be cut into an arbitrary shape, has a small thickness, and has various variability in use, and thus can be applied to a wide range. Although the embodiment of the present invention uses a cholesteric liquid crystal display label for labeling an optical disc, the cholesteric liquid crystal display label can also be used to mark other items or to perform other applications.

1 is a cross-sectional view showing a cholesteric liquid crystal display label according to an embodiment of the present invention. Surface map. The cholesteric liquid crystal display label 100A includes a dark layer 102, a cholesteric liquid crystal layer 104 formed over the dark layer 102, and a transparent polymer layer 106 formed over the cholesteric liquid crystal layer 104. The thickness of the cholesteric liquid crystal display label 100A may be between 100 and 200 um. The dark layer 102 can be a full wavelength light absorbing layer comprising a dye component. The thickness of the dark layer 102 can be less than 1 um. The cholesteric liquid crystal layer 104 may include a microcellularized cholesteric liquid crystal, wherein the liquid crystal material is, for example, Merck BL-118. The cholesteric liquid crystal layer 104 may have a thickness of 5 to 20 um. The transparent polymeric layer 106 can comprise polyethylene terephthalate (PET), polycarbonate (PC), or other suitable soft plastic materials. The transparent polymer layer 106 may have a thickness of from 100 to 150 um, preferably 125 um.

The pattern can be comprehensively or locally written on the cholesteric liquid crystal display label 100A by means of illumination. When light is irradiated on the cholesteric liquid crystal display label 100A, since the dark layer 102 absorbs light to generate heat, the reflectance of the cholesteric liquid crystal display label 100A is changed, and thus the pattern is developed. When the cholesteric liquid crystal display label 100A is irradiated with a light source of different light energy or intensity, the cholesteric liquid crystal display label 100A has a different reflectance, so that the written pattern has a gray scale effect, thereby controlling the written pattern to be more Good contrast. By having a smaller illumination area when the control light source is illuminated on the label, the written pattern can be better resolved. Since the cholesteric liquid crystal display label 100A has a bi-stable, the stable presentation of the pattern can be maintained without power supply after writing.

Referring to FIG. 2, the cholesteric liquid crystal display label 100A is disposed on the surface of the optical disc 200 for indicating the optical disc 200. Dark layer 102 adjacent In the optical disc 200, the transparent polymer layer 106 is away from the optical disc 200 (not shown). The optical disc 200 having the cholesteric liquid crystal display label 100A further includes an insulating portion 300. The optical disc 200 includes a CD, DVD or other suitable storage medium. The material layer in the cholesteric liquid crystal display label 100A, such as the transparent polymer layer 106, provides protection for the surface of the optical disc, prevents the optical disc from being damaged, and improves the preservability. The cholesteric liquid crystal display label 100A has flexibility, can be cut into an arbitrary shape, and has a low production cost. Since the cholesteric liquid crystal display label 100A does not require a backlight module, its thickness can be relatively thin, and the cholesteric liquid crystal display label does not affect the use of the optical disc when it is disposed on the surface of the optical disc.

In one embodiment, the step of forming the cholesteric liquid crystal display label 100A is integrated into the manufacturing process of the optical disc 200. In other embodiments, the cholesteric liquid crystal display label 100A is used independently, for example, by attaching the cholesteric liquid crystal display label 100A to the surface of the optical disc 200 by attaching. The cholesteric liquid crystal display label 100A can be placed on the surface of the optical disc 200 after being written into the pattern. The cholesteric liquid crystal display label 100A may be first placed on the surface of the optical disc 200 and then written into the pattern. In one embodiment, a full or partial write pattern on the cholesteric liquid crystal display label 100A is performed using a laser or a flash lamp. In one embodiment, the optical disc 200 having the cholesteric liquid crystal display label 100A is a full or partial write pattern on the cholesteric liquid crystal display label 100A in the optical disc drive using the read/write head of the optical disc drive.

3 is a view showing a cholesterol liquid crystal display label according to another embodiment of the present invention. Sectional view. The cholesteric liquid crystal display label 100B includes a conductive layer 101, a dark layer 102, a cholesteric liquid crystal layer 104, a transparent conductive layer 105, and a transparent polymer layer 106. Conductive layer 101 can comprise silver, chromium, or other suitable electrically conductive material. The thickness of the conductive layer 101 can be determined by the conductivity of the material, and the preferred thickness is between about 500 nm and 800 nm. The transparent conductive layer 105 may be a transparent conductive material such as indium tin oxide or indium zinc oxide.

Referring to FIGS. 4 and 5, the cholesteric liquid crystal display label 100B is disposed on the surface of the optical disc 200 for indicating the optical disc 200. The conductive layer 101 is adjacent to the optical disc 200, and the transparent polymer layer 106 is away from the optical disc 200 (not shown). The optical disc 200 having the cholesteric liquid crystal display label 100B includes a pair of electrodes 400A (Fig. 4) or 400B (Fig. 5) in addition to the insulating portion 300, adjacent to the cholesteric liquid crystal display label 100B. In Fig. 4, the electrodes 400A are individually provided separately on the insulating portion 300. In Fig. 5, the electrode 400B is separately provided on the insulating portion 300 and the optical disc 200 on both sides of the cholesteric liquid crystal display label 100B. The electrodes 400A/400B are electrically connected to the conductive layer 101 and the transparent conductive layer 105 in the cholesteric liquid crystal display label 100B, respectively, so that the conductive layer 101 and the transparent conductive layer applied in the cholesteric liquid crystal display label 100B can be controlled through the electrodes 400A/400B. The voltage of layer 105.

The pattern can be written comprehensively or locally on the cholesteric liquid crystal display label 100B by means of illumination or illumination in synchronism with the application of voltage. The intensity of the illuminating light source or the size of the energy source, the state of the applied voltage or the dark layer material can be controlled, and the pattern to be written is controlled to be a gray scale pattern or a color pattern, and the written pattern is preferably contrasted. When the light source is irradiated with a light source of different light energy When the alcohol liquid crystal displays the label 100B, the cholesteric liquid crystal display label 100B has a different reflectance, so that the written pattern has a gray scale or color effect. When the cholesteric liquid crystal display label 100B is irradiated with a light source of fixed light energy, different voltages can be applied to make the cholesteric liquid crystal display label 100B have different reflectances so that the written pattern has a gray scale or color effect. The cholesteric liquid crystal display label 100B may have a different reflectance to develop a pattern by applying different voltages without writing the light source. The pattern written in the cholesteric liquid crystal display label 100B can be quickly removed by electrically driving. Since the cholesteric liquid crystal display label 100B can be repeatedly written and erased, it is environmentally friendly.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100A‧‧‧Cholesterol LCD label

100B‧‧‧Cholesterol LCD display label

101‧‧‧ Conductive layer

102‧‧‧dive layer

104‧‧‧Cholesteric liquid crystal layer

105‧‧‧Transparent conductive layer

106‧‧‧Transparent polymer layer

200‧‧‧ discs

300‧‧‧Insulation

400A‧‧‧electrode

400B‧‧‧electrode

1 is a cross-sectional view showing a cholesteric liquid crystal display label according to an embodiment of the present invention; FIG. 2 is a view showing an optical disc having a cholesteric liquid crystal display label according to an embodiment of the present invention; and FIG. 3 is a view showing a cholesteric liquid crystal display label according to an embodiment of the present invention. Cross-sectional views; Figures 4 and 5 show schematic views of an optical disk having a cholesteric liquid crystal display label in accordance with an embodiment of the present invention.

100B‧‧‧Cholesterol LCD display label

101‧‧‧ Conductive layer

102‧‧‧dive layer

104‧‧‧Cholesteric liquid crystal layer

105‧‧‧Transparent conductive layer

106‧‧‧Transparent polymer layer

Claims (20)

An optical disc having a cholesteric liquid crystal display label, comprising: a disc; and a cholesteric liquid crystal display label disposed on a surface of the optical disc, wherein the cholesteric liquid crystal display label comprises: a dark layer formed on the optical disc a cholesteric liquid crystal layer formed over the dark layer; and a transparent polymer layer formed over the cholesteric liquid crystal layer. An optical disc having a cholesteric liquid crystal display label as claimed in claim 1, wherein the optical disc comprises a CD or a DVD. An optical disc having a cholesteric liquid crystal display label according to claim 1, wherein the cholesteric liquid crystal display label has flexibility. An optical disc having a cholesteric liquid crystal display label according to claim 1, wherein the transparent polymer layer comprises polyethylene terephthalate (PET) or polycarbonate (PC). An optical disk having a cholesteric liquid crystal display label as described in claim 1, wherein the dark layer comprises a dye. The optical disc having the cholesteric liquid crystal display label of claim 1, wherein the cholesteric liquid crystal display label further comprises: a conductive layer formed under the dark layer; and a transparent conductive layer formed on the cholesteric type Between the liquid crystal layer and the transparent polymer layer. An optical disc having a cholesteric liquid crystal display label according to claim 6, wherein the transparent conductive layer comprises indium tin oxide or indium zinc Oxide. An optical disc having a cholesteric liquid crystal display label according to claim 6, wherein the conductive layer is silver or chromium. An optical disc having a cholesteric liquid crystal display label according to claim 6, further comprising a pair of electrodes adjacent to the cholesteric liquid crystal display label, wherein the electrodes are respectively electrically connected to the conductive layer and the transparent conductive layer connection. A method for marking an optical disc comprises the steps of: providing a disc; and providing a cholesterol liquid crystal display label on the surface of the optical disc to form a disc having a cholesterol liquid crystal display label, wherein the cholesterol liquid crystal display label comprises a a dark layer, a cholesteric liquid crystal layer formed over the dark layer, and a transparent polymer layer formed over the cholesteric liquid crystal layer; and a method of applying a voltage by light irradiation or light irradiation on the label At least one pattern is written in which the dark layer absorbs light to generate heat, causing the reflectance of the cholesteric liquid crystal display label to change, thereby visualizing the pattern. The method of marking an optical disc according to claim 10, wherein the optical disc having the cholesteric liquid crystal display label comprises the feature of any one of claims 1 to 9. The method for labeling an optical disc according to claim 10 of the patent application further includes removing the pattern by applying a voltage. The method for labeling an optical disc as described in claim 10, further comprising the step of repeating writing or erasing the pattern. The method of marking an optical disc according to claim 10, wherein the pattern is written on the label before the label is placed on the surface of the optical disc. The method of marking an optical disc according to claim 10, wherein the pattern is written on the label after the label is placed on the surface of the optical disc. The method of marking an optical disc according to claim 10, wherein the label is attached to a surface of the optical disc. The method of marking an optical disc according to claim 10, wherein the step of forming the label is integrated in the manufacturing process of the optical disc. A method of marking an optical disc according to claim 10, wherein the optical writing is performed by using a laser pointer or a flash lamp. The method for marking an optical disc according to claim 10, wherein the optical disc is used in the optical disc drive to perform optical writing. The method of marking an optical disc according to claim 10, wherein the pattern is a gray scale or a color pattern.