TWI330265B - Color filter substrate of liquid crystal display panel and manufacture method thereof - Google Patents

Description

1330265 *

达达编号号: TW3221PA IX. Description of the Invention: [Technical Field] The present invention relates to a color filter substrate for a liquid crystal display panel and a method of fabricating the same, and more particularly to a liquid crystal capable of reducing occurrence of a dead pixel A color filter substrate of a display panel and a method of manufacturing the same. [Prior Art] The fabrication technology of a liquid crystal display panel (LCD* panel) has been rapidly developed in recent years, and the liquid crystal display panel has been greatly improved in terms of image quality, reaction rate, and panel size. And because of its small size, light weight, power saving and no radiation, the liquid crystal display panel is widely used in notebook computers, digital cameras, digital video cameras, mobile phones, computer screens and LCD TVs. In various electronic products. In the process of the conventional liquid crystal display panel, in order to avoid the phenomenon of light leakage, the black matrix and the color filter of the color filter substrate are partially overlapped. When the transparent electrode layer is formed on the black matrix and the color filter, the transparent electrode has a large height at the above overlap. If a foreign matter such as a particle or a gel falls near the edge of the black matrix, the transparent electrode formed thereon may be more convex. When the color filter substrate and the thin-film transistor substrate are pressed together, the transparent electrode of the color filter substrate and the transparent electrode of the thin film transistor substrate are in contact with each other, and a short circuit occurs.

Three 3®: TW3221PA symbolizes the normal rotation of liquid crystal molecules between the two substrates. Thus, the pixels corresponding to the pixels here cannot be displayed normally, and a defect is formed. When the number of dead pixels in the liquid crystal display panel exceeds the standard value, the liquid crystal display panel has no such thing as the manufacturer, and the core increases the cost of production, which causes a decrease in the yield of the product. In order to avoid the occurrence of bad points in the manufacturing process of the liquid crystal display panel, the method of optical automatic detection (Aut〇matic 0ptical Inspecti〇n, A〇I) is generally used to detect foreign matter on the substrate, thereby further repairing the repairing machine. Actions. However, this method requires extra time to be repaired in the process, and there is still a problem that the detection error cannot completely repair the substrate. In particular, when the number of foreign objects on the substrate is large, the repair time is further extended. As a result, it is impossible to effectively improve the yield and improve the production efficiency. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a color filter substrate for a liquid crystal display panel and a method of manufacturing the same. This is to avoid the occurrence of a dead pixel by forming an insulating layer on the color filter substrate in the same pattern as the black matrix. This can increase the yield of the product, increase the production efficiency, and maintain the penetration rate of the open area. According to one aspect of the present invention, a color filter substrate is proposed. A substrate, a black matrix, a color filter, an electrode layer, and an insulating layer are included. The black matrix is disposed on the substrate and has a plurality of openings that expose portions of the substrate. A color filter is disposed on the substrate corresponding to the openings for coloring a light. The electrode layer is set on the black matrix 1330265

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: TW3221PA t and color filter. The insulating layer is disposed on the electrode layer, and the insulating layer only partially covers the electrode layer. The black matrix and the insulating layer have the same pattern. According to another object of the present invention, a liquid crystal display panel is proposed. A thin film transistor substrate, a color filter substrate, and a liquid crystal layer are included. The color filter substrate is disposed in parallel on the thin film transistor substrate and includes a substrate, a black matrix, an electrode layer and an insulating layer. The black matrix is placed on the substrate and has a plurality of openings. These openings are the exposed portions of the substrate. A color filter is disposed on the substrate corresponding to the openings for coloring the light. The electrode layers are disposed on the black matrix and the color filter. The insulating layer is disposed on the electrode layer to partially cover only the electrode layer. The black matrix and the insulating layer have the same pattern. The liquid crystal layer is disposed between the thin film transistor substrate and the color filter substrate. According to still another object of the present invention, a method of manufacturing a color filter is proposed. First, a substrate is provided. Next, a black matrix is formed on the substrate in accordance with a pattern. The black matrix has a plurality of openings that open portions of the substrate. Next, the 'formation-color filter' corresponds to the openings on the substrate. Further, an -electrode layer is formed on the black matrix and the color filter. Then, an insulating layer is formed on the electrode layer in accordance with this pattern, and the insulating layer only partially covers the electrode layer. The above-mentioned objects, features, and advantages of the present invention will become more apparent and understood. The following detailed description of the preferred embodiments, together with the details, is described in detail below: > 1330265 %

Sanda number: TW3221PA surface [Embodiment] First embodiment, please refer to FIG. 1 and FIG. 2-8~2, FIG. 1 is a flow chart showing a method of manufacturing a color filter substrate according to the present invention; 2A to 2E are diagrams respectively showing steps u to 15 of FIG. 1 . First, as shown in step 11, a substrate 21 is provided, and then step 12 is performed. As shown in Fig. 2B, a black matrix 22 is formed on the substrate 21 in accordance with a pattern. The black matrix 22 has a plurality of opening 22a which are exposed portions of the substrate 21. Next, step 进行13 is performed, as shown in Fig. 2C, to form a color filter (c〇1〇rfUter) 23 on the substrate 21 corresponding to the positions of the openings 22a. In more detail, the color filter 23 is partially overlapped with the black matrix 22 to avoid light leakage. The color filter 23 includes at least a red filter layer 23r, a green filter layer 23g, and a blue filter layer 23b. Further, in step 14, as shown in FIG. 2D, an electrode layer is formed. 24 is on the black matrix 22 and the color filter 23. Finally, in step 15, please refer to FIG. 2E to form an insulating layer 25 on the electrode layer 24 in accordance with the above pattern, and the insulating layer 25 only partially covers the electrode layer 24. At this time, the color filter substrate 2 according to the present invention is completed. Continuing to refer to FIG. 2E. Further, the substrate 21 is a transparent glass substrate such that a light L can penetrate through the substrate 21. The color filter 23 is also a light transmissive material so that the light L can pass through the color filter 23. Further, the material of the electrode layer 24 is a transparent indium tin oxide (ITO). The insulating layer is preferably also a transparent material. So when 9 1330265

ΞΜ& : TW3221PA light L· 'red filter layer 23r, green filter layer when passing through the substrate 21, the openings 22a, the color light-emitting sheet 23, and the electrode layer 24' through the color filter substrate 20 in the Y direction The 23 g and the blue filter layer 23b respectively color the light L to form red light r, green light G, and blue light B. Further, the black matrix 22 is an opaque region on the color filter substrate 20, which is masked and exposed by a mask (not shown) to be formed on the substrate 21. The reticle has a pattern opposite to the above pattern. The insulating layer 25 can also be shielded and exposed by the same mask to form on the electrode layer 24. Thus, the black matrix 22 and the insulating layer 24 have the same pattern. Since the black matrix 22 and the insulating layer 25 have the same pattern, the electrode layer 24 located above the portion where the color filter 23 and the black matrix 22 overlap is covered by the insulating layer 25. The electrode layer 24 corresponds to the openings 22a of the black matrix 22 and is not covered by the insulating layer 25 to maintain the optical characteristics of the light L passing through the color filter substrate through the openings 22a. Second Embodiment Referring to Figure 3, there is shown a schematic view of a liquid crystal display panel in accordance with a second embodiment of the present invention. The liquid crystal display panel 100 includes a thin film substrate substrate (TFT substrate) 30, a liquid crystal layer 40, and a color filter substrate (CF substrate), for example, the color of the first embodiment. Filter 1330265

Sanda number: TW322IPA substrate 20. The color filter substrate 20 is disposed in parallel on the thin film transistor substrate 30' and includes a substrate 2, a black matrix 22, a color filter 23, an electrode layer 24, and an insulating layer. Layer 25. The black matrix 22 is disposed on the substrate 21 and has a plurality of openings 22a which are exposed portions of the substrate 21. The color filter 23 is disposed on the substrate 21 corresponding to the openings 22a, and the color filter 23 is partially overlapped with the black matrix 22 to avoid light leakage. The color filter 23 includes at least a red filter layer 23r, a green filter layer 23g, and a blue color filter layer 23b' for coloring a light L. The electrode layer 24 is provided on the black matrix 22 and the color filter 23. The insulating layer 25 is disposed on the electrode layer 24' and the insulating layer 25 only partially covers the electrode layer 24. The black matrix 22 has the same pattern as the insulating layer 25. The liquid crystal layer 40 is disposed between the thin film transistor substrate 30 and the color filter substrate 2A. In the color filter substrate 20, the substrate 21 is a transparent glass substrate. The color filter 23 is a light-transmitting material, and the material of the electrode layer 24 is a transparent indium tin oxide (ITO). The insulating layer is preferably also a transparent material. Therefore, the light ray L can pass through the color filter substrate 20 in the Y direction via the substrate 21, the openings 22a, the color filter 23, and the transparent electrode 24, and is respectively colored by the red filter layer 23r and the green light. The layer 23g and the blue filter layer 23b are colored to form red light R, green light G, and blue light 3. An electric field is applied between the electrode layer 24 of the color filter substrate 2 and the electrode layer 34 of the thin dielectric substrate 30, so that liquid crystal molecules in the seed layer 40 can be rotated. The black matrix 22 and the insulating layer 25 utilize the same mask (not shown) 11 1330265 «

= up number: TW3221PA is formed by masking and exposure, so that the black matrix 22 and the insulating layer 25 have the same pattern. Light rays L passing through the openings 22a, the color filter 23, and the electrode layer 24 are not affected by the insulating layer 25. And since the insulating layer 25 has the same pattern as the black matrix 22, the liquid crystal display panel 100 can maintain its optical characteristics such as retardation or transmittance of light. On the other hand, since the electrode layer 24 located at the overlap of the color filter 23 and the black matrix 22 has a high height, when the foreign matter falls near the edge of the black matrix 22, the formed electrode layer 24 occurs. The phenomenon of bulging. At this time, since the electrode layer 24 is isolated by the insulating layer 25, the electrode layer 24 is not in contact with the electrode layer 34 of the thin film transistor substrate 30. This ensures that the electrode layer 24 does not short-circuit with the electrode layer 34 of the thin film transistor substrate 30, thereby avoiding the problem of occurrence of a dead pixel. The color filter substrate of the liquid crystal display panel and the method for fabricating the same according to the preferred embodiment of the present invention are embedded in a conventional color filter substrate, and are further insulated from the black matrix to have the same pattern on the electrode layer. Floor. It has the following advantages: 1. When the electrode layer is convex due to foreign matter in the process, it is isolated by the insulating layer, and is not in contact with the electrode layer of the thin film transistor substrate, thereby avoiding a short circuit and causing a dead pixel. The problem, which in turn increases the yield of the product. 12 1330265

Sanda number: TW3221PA * 2. The efficiency of production is increased because there is no need to use the repair machine for repairing. 3. Since it is only necessary to simply add the step of forming the insulating layer in the process of the conventional color filter substrate, it is not necessary to significantly change the original production process, and the production cost is not significantly increased. 4. The insulating layer and the black matrix are covered and exposed by the same mask, which saves the cost of making the mask. The present invention has been described above by way of a preferred embodiment, and is not intended to limit the invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. 13 1330265

Sanda number: TW3221PA [Simplified description of the drawings] Fig. 1 is a flow chart showing a method of manufacturing a color filter substrate according to the present invention; Fig. 2A is a view showing a step 11 of Fig. 1; FIG. 2 is a schematic diagram of step 13 of FIG. 1; FIG. 2D is a schematic diagram of step 14 of FIG. 1; FIG. 2E is a schematic diagram of step 15 of FIG. FIG. 3 is a schematic view showing a liquid crystal display panel according to a second embodiment of the present invention.

1330265

Sanda number: TW3221PA [Description of main component symbols] 2 0. Color calender substrate 21: Substrate 22: Black matrix 22a: Opening 23: Color filter 23b: Blue filter layer 23g: Green phosphor layer • 23r: red filter layer 24, 34: electrode layer 25: insulating layer 30: thin film transistor substrate 40: liquid crystal layer 100 • liquid crystal display panel B: blue light G: green light® L: light R: red light Y: Direction 15

Claims (1)

1330265 Sanda number: TW3221PA X. Patent application scope: 1. A color filter substrate comprising: a substrate; a black matrix disposed on the substrate and having a plurality of openings, Opening the exposed portion of the substrate; a color filter disposed on the substrate corresponding to the openings for coloring a light; an electrode layer disposed on the black matrix and the On the color filter, an insulating layer is disposed on the electrode layer, and the insulating layer only partially covers the electrode layer; wherein the black matrix and the insulating layer have the same pattern. 2. The color filter substrate of claim 1, wherein the substrate is a transparent glass substrate. The color filter substrate according to claim 1, wherein the color light-emitting sheet is a light-transmitting material. 4. The color filter substrate of claim 3, wherein the light passes through the color filter, the color filter coloring the light to form red light, green light, and blue light. . 5. The color filter substrate of claim 1, wherein the black matrix is an opaque region of the color filter substrate. 6. The color filter substrate of claim 1, wherein the electrode layer is made of indium tin oxide (Indium Tin Oxide, 16 1330265 Sanda number: TW3221 PA m ITO). 7. A liquid crystal display panel </ RTI> comprising: a thin film substrate (TFT substrate); a color filter substrate disposed in parallel on the thin film transistor substrate, the color filter substrate comprising: a substrate; a black matrix disposed on the substrate, and having a plurality of openings, the openings being exposed portions of the substrate; a color filter disposed on the substrate Corresponding to the openings for coloring a light; an electrode layer disposed on the black matrix and the color filter; and an insulating layer disposed on the electrode layer, and the insulating layer is only The electrode layer is partially covered; and a liquid crystal layer is disposed between the thin film transistor substrate and the color filter substrate; wherein the black matrix and the insulating layer have different patterns. 8. The liquid crystal display panel of claim 7, wherein the substrate is a transparent glass substrate. 9. The liquid crystal display panel of claim 7, wherein the color filter is a light transmissive material. 10. The liquid crystal display panel of claim 9, wherein the light is passed through the color filter, and the color filter is colored to form a red light. , green light and blue light. 11. The liquid crystal display panel of claim 7, wherein the black matrix is an opaque region of the color filter substrate. 12. The liquid crystal display panel of claim 7, wherein the electrode layer is made of Indium Tin Oxide (ITO). 13. A method of fabricating a color filter substrate, comprising: providing a substrate; forming a black matrix (black matdx) on the substrate according to a pattern, the black matrix having a plurality of openings, Opening the exposed portion of the substrate; forming a color filter on the substrate corresponding to the openings; forming an electrode layer on the black matrix and the color filter; and forming an insulation according to the pattern A layer is on the electrode layer, and the insulating layer only partially covers the electrode layer. 14. The manufacturing method according to claim 13, wherein the substrate is a transparent glass substrate. 15. The method of manufacture of claim 13, wherein the filter layer is a light transmissive material. 16. The method of manufacturing of claim 13, wherein the black matrix is an opaque region of the color filter substrate. 17. The manufacturing method according to claim 13, wherein the material of the electrode layer is indium tin oxide (formation (10) Ήη 〇 xide, ITO).