TWI667500B - Color filter, display panel and manufacturing methods thereof - Google Patents

Abstract

A color filter includes a plurality of first color light patterns and a light shielding layer. The first color light pattern is disposed on the substrate, wherein each first color light pattern has an arc-shaped surface. The light-shielding layer is disposed on the first color light pattern. The light-shielding layer has a plurality of openings to respectively expose portions of the arc-shaped surface of the first color light pattern. A method for manufacturing a color filter, a display panel, and a method for manufacturing the same are also proposed.

Description

Color filter, display panel and manufacturing method thereof

The invention relates to a filter film, a panel and a manufacturing method thereof, and in particular to an inorganic color filter, a display panel and a manufacturing method thereof.

Quantum dots (Quantum Dot) are semiconductor nanostructures that trap internal electrons in three spatial directions. This constraint can be attributed to electrostatic potential, the interface of two different semiconductor materials, the surface of a semiconductor, or a combination of the three. Therefore, quantum dots have unique photoelectric characteristics. For example, when excited, quantum dots emit high-purity monochromatic light of various colors according to their diameters. Therefore, they are often used in color light patterns in color filters.

However, because the excited light may be absorbed by the light-shielding layer surrounding the colored light pattern and cause loss of the light source to reduce light usage, and the light generated by the quantum dots will scatter in all directions, so it is not only easy to cause light leakage or light mixing problems. Light will also be absorbed by the light-shielding layer to reduce light output efficiency, resulting in poor display quality.

A method for manufacturing a color filter according to an embodiment of the present invention includes the following steps: forming a plurality of first color light patterns on a substrate; forming a light-shielding material layer on the first color light pattern; and forming a plurality of light-shielding material layers Openings to form a light-shielding layer. Each of the first color light patterns has an arc-shaped surface. The openings respectively expose a part of the arc-shaped surface of the first color light pattern.

In an embodiment of the present invention, during the step of forming the opening, a plurality of reflective layers are formed on the arc-shaped surface of the first color light pattern, respectively, and the reflective layers are substantially disposed on the arc-shaped surface of the first color light pattern. And between the light-shielding layers.

In an embodiment of the present invention, before the step of forming the light-shielding material layer, the above-mentioned manufacturing method further includes forming a plurality of second-color light patterns on the substrate, and forming a plurality of third-color light patterns on the substrate.

A method for manufacturing a display panel according to an embodiment of the present invention includes the following steps: manufacturing a color filter by using the above-mentioned color filter manufacturing method; providing an active element array with respect to a first color light pattern; and providing a light source. The light shielding layer and the first color light pattern are substantially located between the substrate and the light source.

In an embodiment of the present invention, the light source is a blue light source, and the light shielding layer is substantially located between the light source and the first color light pattern.

In an embodiment of the present invention, the manufacturing method further includes forming a liquid crystal layer between the active device array and the color filter, wherein the active device array is located between the light source and the liquid crystal layer.

A color filter according to an embodiment of the present invention includes a plurality of first color light patterns disposed on a substrate and a light shielding layer disposed on the first color light patterns. First light The pattern has an arc-shaped surface. The light-shielding layer has a plurality of openings to expose a part of the arc-shaped surface of the first color light pattern, respectively.

A display panel according to an embodiment of the present invention includes the above-mentioned color filter, the arrangement of the active element array with respect to the first color light pattern, and a light source. The light shielding layer and the first color light pattern are substantially located between the substrate and the light source.

In the color filter and the manufacturing method thereof according to an embodiment of the present invention, since a plurality of first color light patterns are directly formed on the substrate, the manufacturing process can be simplified, the color light materials can be saved to avoid waste, and it has environmental protection . It can also reduce production time and manufacturing costs. Then, the light shielding layer is disposed on the first color light pattern, and a part of the arc-shaped surface of the first color light pattern is exposed through a plurality of openings, so that light can be concentrated and focused in the first color light pattern. In this way, light leakage can be reduced, light source losses can be reduced, and light usage can be increased.

One of the objects of the present invention is to reduce the loss of the light source.

One of the objects of the present invention is to improve the light utilization rate of a color filter.

One of the objectives of the present invention is to improve light collimation so as to improve the light output efficiency of the color filter.

One object of the present invention is to improve the problem of light leakage or light mixing of a color filter.

One of the objects of the present invention is to improve color purity.

One object of the present invention is to simplify the manufacturing process of color filters.

One of the objects of the present invention is to reduce the manufacturing time of color filters.

One of the objects of the present invention is to reduce the manufacturing cost of a color filter.

One of the objectives of the present invention is to make the process of color filters environmentally friendly.

One object of the present invention is to improve the display quality of a display panel.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

10‧‧‧Display Panel

100‧‧‧ color filter

110‧‧‧ substrate

120R‧‧‧First color light object

120G‧‧‧Second Color Light

120B‧‧‧Third Color Light Object

121R‧‧‧First color light material layer

121G‧‧‧second color light material layer

121B‧‧‧ third color light material layer

122R‧‧‧First color light pattern

122G‧‧‧Second color light pattern

122B‧‧‧Third color light pattern

124R, 124G, 124B‧‧‧arc surface

126R, 126G, 126B‧‧‧Residual color light material layer

128‧‧‧ filler

130‧‧‧Reflective material layer

132‧‧‧Reflection pattern

134‧‧‧Reflective layer

140‧‧‧Light-shielding material layer

142‧‧‧Light-shielding layer

144‧‧‧ opening

150R‧‧‧The first mold

150G‧‧‧Second Mould

150B‧‧‧Third Mould

152R‧‧‧The first recess

152G‧‧‧Second Recess

152B‧‧‧th third recess

160‧‧‧patterned mask

200‧‧‧ Active Element Array

300‧‧‧ light source

L _in ‧‧‧ first beam

L _out ‧‧‧ second beam

LC‧‧‧LCD layer

Q‧‧‧ Quantum Dots

1A to 1J are schematic cross-sectional views of a method for manufacturing a color filter according to an embodiment of the present invention.

FIG. 2A is an enlarged cross-sectional view of a color filter according to an embodiment of the present invention.

FIG. 2B is an enlarged cross-sectional view of a color filter according to an embodiment of the present invention.

3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention.

4A to 4M are schematic cross-sectional views of a method for manufacturing a color filter according to another embodiment of the present invention.

1A to 1J are schematic cross-sectional views of a method for manufacturing a color filter according to an embodiment of the present invention. It should be noted that, for clarity and ease of explanation, the thickness or proportion of each layer or element in FIG. 1A to FIG. 1J is appropriately enlarged or reduced, and does not represent the actual thickness or proportion of each layer or element. . Please refer to FIG. 1A and FIG. 1B first. In this embodiment, a plurality of first color light patterns 122R are formed on the substrate 110. In this embodiment, the substrate 110 is a light-transmitting substrate. For example, the material of the substrate 110 is, for example, For glass. However, the present invention is not limited thereto. In other embodiments, the substrate 110 may also use other suitable materials, such as quartz, organic polymers, and the like.

The step of forming the first colored light pattern 122R in this embodiment may include forming a plurality of first colored light objects 120R on the substrate 110 by an inkjet printing method. Next, the first colored light objects 120R are cured to form first colored light patterns 122R, respectively. Each of the first colored light patterns 122R has an arc-shaped surface 124R. For example, the arc-shaped surface 124R is a surface facing away from the first color light pattern 122R of the substrate 110, and the arc-shaped surface 124R is convex in a direction opposite to the substrate 110. It should be noted that, in this embodiment, an inkjet printing method is taken as an example to describe the steps of forming a colored light pattern, but the present invention is not limited thereto.

Next, referring to FIG. 1C to FIG. 1I, before the step of forming the light-shielding material layer 140, a plurality of second-color light patterns 122G may be formed on the substrate 110. Please refer to FIGS. 1C to 1D. The step of forming the second color light pattern 122G may include forming a plurality of second color light objects 120G on the substrate 110 by an inkjet printing method. The second color light object 120G may not be in contact with the first color light pattern 122R. . Next, the second colored light objects 120G are cured to form second colored light patterns 122G, each of which has an arc-shaped surface 124G, similar to the curved surface 124R of the first colored light pattern 122R, as shown in FIG. 1D.

Next, please refer to FIGS. 1E to 1I. After the step of forming the second color light pattern 122G and before the step of forming the light shielding material layer 140, a plurality of third color light patterns 122B may be formed on the substrate 110. 1E to 1F, the step of forming the third color light pattern 122B may include forming a plurality of third color light objects 120B on the substrate 110 by an inkjet printing method, and the third color light object 120B may not be the same as the first color light pattern. 122R and the second color light pattern 122G are in contact. Next, the third colored light object 120B is cured to form a third colored light pattern 122B. Each third colored light pattern 122B has an arc-shaped surface 124B, similar to the curved surface 124R of the first colored light pattern 122R, as shown in FIG. 1F. The plurality of first color light patterns 122R, the second color light patterns 122G, and the third color light patterns 122B are exemplarily arranged in an array, but the present invention is not limited thereto. It should be noted that the color filter 100 in this embodiment is exemplified by including three color light patterns 122R, 122G, and 122B, that is, the three color light patterns 122R, 122G, and 122B can respectively emit red light, green light, and Blue light, but the invention is not limited to this. In other embodiments, the number of colored light patterns included in the color filter 100 and the corresponding light color and number of colors may be determined by the needs of the designer.

It should be noted that, in this embodiment, it is preferable to sequentially form the colored light patterns 122R, 122G, and 122B, but the present invention is not limited thereto. In other embodiments, all the colored light objects 120R, 120G, and 120B may be formed first, and then all the colored light patterns 122R, 122G, and 122B may be formed by curing. In this way, the manufacturing steps and time can be further reduced.

1G, in this embodiment, after the step of forming the third color light pattern 122B, a reflective material layer 130 may be formed on the first color light pattern 122R. More specifically, the reflective material layer 130 may be formed on the colored light patterns 122R, 122G, 122B. In this embodiment, the material of the reflective material layer 130 may include a material capable of reflecting visible light, such as aluminum (Al), silver (Ag), chromium (Cr), copper (Cu), nickel (Ni), and titanium (Ti). , Molybdenum (Mo), magnesium (Mg), platinum (Pt), gold (Au), or a combination thereof, but not limited thereto.

1G to 1H, after the step of forming the reflective material layer 130, a part of the reflective material layer 130 may be removed to form a plurality of reflective patterns 132 respectively located on the arc-shaped surface 124R of the first color light pattern 122R, and The substrate 110 is exposed. For example, the reflective material layer 130 located between the colored light patterns 122R, 122G, and 122B and located on the substrate 110 may be removed by laser or lithographic etching to form a plurality of reflection patterns 132 on the colored light patterns 122R, 122G. , 122B on the curved surfaces 124R, 124G, 124B.

Next, referring to FIG. 1I, a light-shielding material layer 140 is formed on the first color light pattern 122R. Specifically, a light-shielding material layer 140 may be formed on the colored light patterns 122R, 122G, and 122B to cover the reflective pattern 132 and the substrate 110 exposed by the reflective pattern 132. In the above configuration, the reflection pattern 132 is located between the light-shielding material layer 140 and the colored light patterns 122R, 122G, and 122B. In this embodiment, the material of the light shielding material layer 140 includes a material capable of shielding light, such as chromium (Cr), nickel (Ni), black polymer resin, graphite, or a combination thereof, but is not limited thereto.

Next, please refer to FIGS. 1I to 1J. After the light-shielding material layer 140 is formed, a plurality of openings 144 are formed in the light-shielding material layer 140 to form a light-shielding layer 142. For example, a part of the light shielding material layer 140 may be removed by laser or lithographic etching to form a plurality of openings 144. The plurality of openings 144 respectively expose a part of the arc-shaped surface 124R of the first color light pattern 122R. It is worth noting that when the openings 144 are formed, a part of each reflection pattern 132 is removed at the same time to form a plurality of reflection layers 134 on the arc-shaped surfaces 124R, 124G, 124B of the colored light patterns 122R, 122G, 122B, respectively. In this way, the light shielding layer can be completed at the same time through a laser or etching process 142 and the reflective layer 134 to simplify the manufacturing process. In this embodiment, the reflective layer 134 is substantially located between the arc-shaped surfaces 124R, 124G, 124B and the light-shielding layer 142 of the colored light patterns 122R, 122G, and 122B, respectively. In addition, the plurality of openings 144 further expose a part of the arc-shaped surfaces 124G and 124B of the colored light patterns 122G and 122B. So far, the production of the color filter 100 has been completed.

In short, the method for manufacturing the color filter 100 of this embodiment is to directly form the colored objects 120R, 120G, and 120B on the substrate 110 by an inkjet printing method, and then cure the colored objects 120R, 120G, and 120B to form the colored objects. The colored light patterns 122R, 122G, and 122B have curved surfaces 124R, 124G, and 124B. In this way, during the manufacturing process, the manufacturing process can be simplified, the materials of colored matter can be saved to avoid waste, and it is environmentally friendly. According to the manufacturing method of the color filter 100 in this embodiment, the manufacturing time and manufacturing cost can be further reduced.

Structurally, the color filter 100 of this embodiment includes a substrate 110, color light patterns 122R, 122G, 122B, a reflective layer 134, and a light-shielding layer 142. For example, a plurality of first color light patterns 122R, a plurality of second color light patterns 122G, and a plurality of third color light patterns 122B are disposed on the substrate 110. The light patterns 122R, 122G, and 122B of each color have arc-shaped surfaces 124R, 124G, 124B that face away from the substrate 110 and protrude in a direction opposite to the substrate 110. The reflective layer 134 is disposed on the arc-shaped surfaces 124R, 124G, and 124B of the colored light patterns 122R, 122G, and 122B and exposes the substrate 110. The light-shielding layer 142 is disposed on the colored light patterns 122R, 122G, and 122B. The light-shielding layer 142 has a plurality of openings 144 to expose portions of the arc-shaped surfaces 124R, 124G, and 124B of the colored light patterns 122R, 122G, and 122B, respectively. In addition, the reflective layer 134 is located in colored light. Between the patterns 122R, 122G, and 122B and the light-shielding layer 142.

It should be noted that the reflective layer 134 of the color filter 100 in this embodiment is located on the color light patterns 122R, 122G, and 122B, but the present invention is not limited thereto. In other embodiments, the reflective layer may be disposed on the arc-shaped surface in the first color light pattern, the second color light pattern, or the third color light pattern and expose the substrate according to the needs of the designer. In the above configuration, the reflective layer may be located between the first color light pattern, the second color light pattern, or the third color light pattern and the light shielding layer.

FIG. 2A is an enlarged cross-sectional view of a color filter according to an embodiment of the present invention. FIG. 2B is an enlarged cross-sectional view of a color filter according to an embodiment of the present invention. Please refer to FIG. 1J and 2A, in the present embodiment, the first light beam L _in a first color light to enter through the opening 144 pattern 122R. Should be noted that the present embodiment is a first embodiment of the light beam L _in the light path of the first color light to enter the pattern 122R example, shown is omitted and the second color pattern 122G ray path corresponding to the third color pattern 122B, the present technology Those skilled in the art can understand the light path conditions corresponding to the second color light pattern 122G and the third color light pattern 122B through the first color light pattern 122R and its related light paths described in this paragraph. Since the first color light pattern 122R has an arc-shaped surface 124R, the first color light pattern 122R may have a focusing ability similar to that of a convex lens. Thus, the first light beam L _in the arcuate surface of the substrate facing away from the permeable 124R 110 is focused on a first color light of the pattern 122R. Based on the above, the first light beam L _in the active set can be entered in the first color pattern 122R, the light loss can be reduced to increase light utilization.

It should be noted that, in other embodiments, the first light beam may also enter the second color light pattern and the third color light pattern. Design of the color filter in the present embodiment, the first light beam L _in may 124G, 124B of the second color light is focused through the arcuate surface opposite to the pattern of the substrate 110 or the third color pattern in the 122G 122B. Therefore, the second color light pattern 122G or the third color light pattern 122B can also obtain the same effect as the first color light pattern 122R, which can reduce light loss and increase light usage.

In this embodiment, the material of the first color light pattern 122R includes a plurality of quantum dots Q dispersed in the filler 128. The first color light pattern 122R may have a quantum well (QW), such as a single quantum well (SQW), a multiple quantum well (MQW), or other quantum wells. In this embodiment, the material of the filler 128 may include a light-transmitting material, such as an acrylic resin, but the present invention is not limited thereto. The material of the quantum dot Q may include a perovskite material. The perovskite material may be a compound represented by the general formula ABX ₃ , where A is an organic or inorganic material; B is an inorganic divalent metal; X is a halogen. Perovskite materials have unique optoelectronic properties, which makes the light they excite has high color purity. In addition, the color of the excitation light can be determined according to the halogen component in the perovskite material. For example, when the perovskite material is a compound represented by CsPbBr ₃ , it can excite green light; when the perovskite material is a compound represented by CsPbI ₃ , it can excite red light; when calcium When a titanium ore material is a compound represented by CsPbCl ₃ , it can excite blue light. In some embodiments, the first color light pattern 122R may include an inorganic perovskite material, such as CsPbX ₃ (X = Cl, Br, I), so that it has better stability and luminous efficiency, but the present invention does not This is the limit.

Please refer to FIG. 2A and FIG. 2B. In this embodiment, a perovskite material is used as the photoluminescence element. Specifically, the first light beam L _in the light source, for example, may be emitted. When the light beam L _in the first pass through the inner arcuate surface 124R 122R focused first color pattern, the first quantum dot Q receive beams L _in, L _in the first light beam may be converted to a second beam L _out. For example, in the present embodiment, the first light beam L _in, for example, blue light. Quantum point Q after receiving the first light beam L _in, may be the first light beam into a second light beam L _in L _out of the visible range. Furthermore, in the present embodiment, the first color light 122R quantum dot pattern Q may convert the first light beam L _in the second red light L _out, but the present invention is not limited thereto. In other embodiments not shown, the quantum dots of the second color light pattern can convert the first light beam into the second green light beam, and the quantum dots of the third color light pattern can convert the first light beam into the second blue light beam. . In addition, in some embodiments, the third color light pattern may not include quantum dots, so that the third color light pattern is transparent, so that the third color light pattern directly displays the blue light of the first light beam. Thereby, the color filter 100 can display colors.

It is worth noting that in this embodiment, since the reflection layer 134 is located between the first color light pattern 122R and the light-shielding layer 142, the second light beam L _out scattered in all directions generated after the quantum dot Q is excited can be reflected by The layer 134 concentrates and enhances the collimation of light. In this way, the light output efficiency of the color filter 100 can be improved, and the problem of light leakage or light mixing can be further improved, so as to improve color purity, and also reduce light source loss.

In brief, the color filter 100 of this embodiment includes color light patterns 122R, 122G, 122B having arc-shaped surfaces 124R, 124G, 124B, a light shielding layer 142 covering the color light patterns 122R, 122G, 122B and the substrate 110, and The reflective layer 134 between the arc-shaped surfaces 124R, 124G, and 124B of the colored light patterns 122R, 122G, and 122B and the light shielding layer 142. The light shielding layer 142 is provided with a plurality of openings 144 to expose a part of the arc-shaped surfaces 124R, 124G, 124B. Thus, the first light beam L _in shade 144 may enter through the opening patterns 122R, 122G, 122B, in order to reduce light leakage. Arcuate surfaces 124R, 124G, 124B can first focus on the color light beam L _in the pattern 122R, 122G, 122B within, in order to reduce the loss of light, increase light utilization. The second light beam L _out can be concentrated and enhanced by the reflective layer 134 to improve the light output efficiency of the color filter 100, to further improve the problem of light leakage or light mixing, to improve color purity, and to reduce light source loss. .

3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention. Please refer to FIG. 3. In this embodiment, the display panel 10 includes the color filter 100, the active device array 200, and the light source 300 described above. In addition, the display panel 10 further includes a liquid crystal layer LC between the active device array 200 and the color filter 100. The liquid crystal layer LC may be other suitable liquid crystal molecules including positive type liquid crystal molecules, negative type liquid crystal molecules, blue phase liquid crystal molecules, cholesterol liquid crystal molecules, but the present invention is not limited thereto. In addition, two alignment layers (not shown) may be respectively located between the liquid crystal layer LC and the active device array 200 and between the liquid crystal layer LC and the color filter 100.

In this embodiment, the active device array 200 is disposed relative to the first color light pattern 122R. Specifically, the active device array 200 is disposed opposite to the colored light patterns 122R, 122G, and 122B, and the active device array 200 is located between the light source 300 and the liquid crystal layer LC. The active device array 200 is, for example, a conventional active device array substrate. It should be noted that FIG. 3 only schematically illustrates the active array element 200, but the present invention does not This is the limit.

In this embodiment, the light source 300 is a blue light source, however, the present invention is not limited thereto. In other embodiments, the light source 300 may also include other types of light, such as ultraviolet light or other suitable types of light. Please refer to FIG. 2A, 2B and 3, the light emitted from the light source 300, for example, a first light beam L _in, can penetrate the active device array 200, and the LC of the liquid crystal layer, a color filter 100 and the arriving. The light-shielding layer 142 and the colored light patterns 122R, 122G, and 122B are substantially located between the substrate 110 and the light source 300, and the light-shielding layer 142 is substantially located between the light source 300 and the colored light patterns 122R, 122G, and 122B. Thus, a first portion of the light beam L _in 144 may enter through the opening 142 of the light shielding colored layer patterns 122R, 122G, 122B, and the other first beam L _in the light-shielding layer 142 can be absorbed to reduce light leakage. Further, the first light beam L _in the pattern may be colored 122R, 122G, 122B concentrated focus in order to reduce the loss of light, increase light utilization.

In the present embodiment, the blue light source may be a first color light beam L _in the pattern 122R, 122G, 122B of the quantum dot is converted to a second Q receive beams L _out. The second light beam L _out can be focused and enhanced by collimating the light through the reflective layer 134. In this way, the light output efficiency of the display panel 10 can be improved, and the problem of light leakage or light mixing can be further improved to improve the color purity. The light source loss can also be reduced, thereby improving the display quality of the display panel 10.

In the following embodiments, the component numbers and parts of the previous embodiments are used, and the same reference numerals are used to indicate the same or similar components. For the description of parts that omit the same technical content, refer to the foregoing embodiments, and the following embodiments are no longer Duplication Described.

4A to 4M are schematic cross-sectional views of a method for manufacturing a color filter according to another embodiment of the present invention. It should be noted that, for clarity and ease of explanation, the thickness or proportion of each layer or element in FIG. 4A to FIG. 4M is appropriately enlarged or reduced, which does not represent the actual thickness or proportion of each layer or element . The manufacturing method shown in this embodiment is similar to FIG. 1A to FIG. 1J, and the main difference is that in this embodiment, the colored light patterns 122R, 122G, and 122B are formed on the substrate 110 by an imprint method. Please refer to FIG. 4A to form a first color light material layer 121R on the substrate 110 in an all-round manner. The first colored light material layer 121R is, for example, a liquid or semi-solid state.

Next, referring to FIG. 4B and FIG. 4C, the step of forming the first color light pattern 122R includes applying a force to the first color light material layer 121R by using the first mold 150R. The first mold 150R has a plurality of first recesses 152R to form a plurality of first colored objects 120R. For example, the first recess 152R is an arc-shaped groove. When the first mold 150R is pressed on the first color light material layer 121R, for example, the first mold 150R and the first recess 152R directly contact the first color light material layer 121R, and the first color light material layer 121R is imprinted by directly applying force. The one-color light object 120R, but the invention is not limited thereto. In other embodiments not shown, a protective layer may be sandwiched between the first mold and the first color-lighting material, so that the first mold can indirectly apply a force to the first color-lighting material to imprint the first color. Light thing. In this way, it is possible to reduce the sticking of colored light materials to the mold, and reduce the manufacturing difficulty.

Next, referring to FIG. 4C and FIG. 4D, the first mold 150R is removed. At this time, the first colored material 120R and the remaining first colored material layer 126R, which are still liquid or semi-solid, are formed on the substrate 110. Next, curing through the patterned mask 160 The first colored light object 120R forms a first colored light pattern 122R. In this embodiment, a procedure for curing the first colored light object 120R is, for example, light curing. For example, ultraviolet light (UV) can be transmitted through the transparent area (not labeled) of the patterned mask 160 to selectively irradiate the first colored light object 120R without irradiating the remaining first colored light material layer 126R. Thereby, the first colored light object 120R can be cured to form the first colored light pattern 122R, and the remaining first colored light material layer 126R will not be cured. However, the present invention is not limited thereto. In other embodiments, the procedure for curing the first colored object 120R may be thermal curing.

4D, after the first colored light pattern 122R is formed and before the step of forming the second colored light pattern 122G, the remaining first colored light material layer 126R may be removed with a solvent. The solvent may be, for example, water, a ketone or an aromatic hydrocarbon-containing ester solvent, but the present invention is not limited thereto.

It is worth noting that, referring to FIG. 2A and FIG. 4D, the material of the first color light pattern 122R includes a plurality of quantum dots Q dispersed in the filler 128. The material of the quantum dot Q may include a perovskite material, but the invention is not limited thereto. Due to the unique optoelectronic properties of the perovskite material, the light it excites has a high color purity.

Next, referring to FIG. 4E, a second color light material material layer 121G is formed on the substrate 110 and covers the first color light pattern 122R. The second color light material layer 121G is, for example, a liquid state or a semi-solid state.

Next, referring to FIG. 4F and FIG. 4G, the step of forming the second color light pattern 122G includes using a second mold 150G to apply a force to the second color light material layer 121G. The second mold 150G has a plurality of second recesses 152G to form a plurality of second colored light objects 120G. For example, in addition to the second mold 150G, the second cavity 152G has a plurality of arcuate contours. In addition, there are a plurality of first recesses 152R, and the first recesses 152R are disposed corresponding to the first color light pattern 122R. When the second mold 150G is pressed on the second color light material layer 121G, for example, the second mold 150G and the second recess 152G are in direct contact with the second color light material layer 121G, and the second color light is imprinted by direct force 120G, but the invention is not limited to this. In other embodiments not shown, a protective layer may be sandwiched between the second mold and the second color light material, so that the second mold indirectly exerts a force on the second color light material to imprint the second color light object. In the configuration of this embodiment, since the first recess 152R is conformal with the first color light pattern 122R, a second color light object 120G can be formed without affecting the first color light pattern 122R.

Next, referring to FIG. 4G and FIG. 4H, the second mold 150G is removed. At this time, the second colored light object 120G that is still liquid or semi-solid and the remaining second colored light material layer 126G are formed on the substrate 110. Further, the second colored light object 120G is cured through the patterned mask 160 to form a second colored light pattern 122G. In this embodiment, the procedure for curing the second colored light object 120G may refer to the procedure for curing the first colored light object 120R, which is not described herein again.

Next, please refer to FIG. 4H. After the second color light pattern 122G is formed and before the step of forming the third color light pattern 122B, the remaining second color light material layer 126G may be removed with a solvent. For the procedure of removing the solvent of the residual second color light material layer 126G, refer to the procedure of removing the residual first color light material layer 126R, and details are not described herein.

Next, referring to FIG. 4I, a third color light material layer 121B is formed on the substrate 110, and covers the first color light pattern 122R and the second color light pattern 122G. The third color light material layer 121B is, for example, a liquid state or a semi-solid state.

Next, referring to FIG. 4J and FIG. 4K, the step of forming the third color light pattern 122B includes applying a force to the third color light material layer 121B by using the third mold 150B. The third mold 150B has a plurality of third recesses 152B to form a plurality of third colored objects 120B. For example, the third mold 150B has a plurality of first recesses 152R and second recesses 152G in addition to the third recesses 152B having a plurality of arc-shaped contours, and the first recesses 152R correspond to the first color light The pattern 122R is disposed, and the second recess 152G is disposed corresponding to the second color light pattern 122G. When the third mold 150B is pressed on the third color light material layer 121B, for example, the third mold 150B and the third recess 152B are in direct contact with the third color light material layer 121B, and the third color light is imprinted by directly applying force.物 120B, but the invention is not limited thereto. In other embodiments not shown, a protective layer may be sandwiched between the third mold and the third color light material, so that the third mold indirectly exerts a force on the third color light material to imprint the third color light object. In the configuration of this embodiment, since the first recess 152R is conformal with the first color light pattern 122R, and the second recess 152G is conformal with the second color light pattern 122G, the first color light pattern 122R and On the premise of the second color light pattern 122G, a third color light object 120B is formed.

Next, referring to FIG. 4K and FIG. 4L, the third mold 150B is removed. At this time, the third colored light object 120B which is still liquid or semi-solid and the remaining third colored light material layer 126B are formed on the substrate 110. Furthermore, the third colored light object 120B is cured through the patterned mask 160 to form a third colored light pattern 122B. In this embodiment, the procedure for curing the third colored light object 120B can be referred to the procedure for curing the first colored light object 120R, which is not repeated here.

Next, please refer to FIG. 4L. After the third color light pattern 122B is formed, The residual third color light material layer 126B is removed with a solvent. For the procedure of removing the solvent of the residual third color light material layer 126B, refer to the procedure of removing the residual first color light material layer 126R, and details are not described herein.

Finally, please refer to FIG. 4M. In this embodiment, the steps of setting the first color light pattern 122R, the second color light pattern 122G, and the third color light pattern 122B on the substrate 110 have been completed. It should be noted that in this implementation, For example, the material of the second color light pattern 122G and the third color light pattern 122B may include quantum dots of perovskite material, but the present invention is not limited thereto. In some embodiments, the third color light pattern may be transparent without including quantum dots.

For subsequent process steps, refer to the foregoing FIG. 1G to FIG. 1J and corresponding descriptions to complete the color filter of this embodiment.

In short, the manufacturing method of the colored light patterns 122R, 122G, and 122B in this embodiment is to use the molds 150R, 150G, and 150B to imprint the colored light material layers 121R, 121G, and 121B by imprinting, and then form the colored light pattern through the curing process 122R, 122G, 122B. In this way, a plurality of colored light patterns 122R, 122G, and 122B can be simultaneously formed in a wide range, further simplifying the manufacturing process and reducing the manufacturing time.

An embodiment of the present invention provides a method for manufacturing a display panel. Please refer to FIG. 3, which includes the following steps. The color filter 100 is manufactured in any of the above embodiments. The active device array 200 is provided relative to the colored light patterns 122R, 122G, and 122B. A light source 300 is provided, wherein the light shielding layer 142 and the colored light patterns 122R, 122G, and 122B are substantially located between the substrate 110 and the light source 300. The light shielding layer 142 is substantially located between the light source 300 and the colored light patterns 122R, 122G, and 122B. Also, in the main A liquid crystal layer LC is formed between the moving element array 200 and the color filter 100. The active device array 200 is located between the light source 300 and the liquid crystal layer LC. So far, the production of the display panel 10 has been completed.

In short, the display panel 10 of this embodiment includes a color filter 100, which can reduce light leakage, and can concentrate light entering the color light patterns 122R, 122G, 122B to reduce light loss and increase light usage. In addition, the light generated by the colored light patterns 122R, 122G, and 122B can be concentrated and light collimated to improve the light output efficiency, further improve the problem of light leakage or mixed light, to improve color purity, and reduce light source loss. The display quality of the display panel 10 is improved.

In summary, a color filter and a manufacturing method thereof according to an embodiment of the present invention, because a plurality of colored light patterns are directly formed on a substrate through inkjet printing, the manufacturing process can be simplified, and colored objects can be saved to avoid waste. And environmentally friendly. It can also reduce production time and manufacturing costs. Then, the light shielding layer is disposed on the color light pattern, and a part of the arc-shaped surface of the color light pattern is exposed through a plurality of openings, so that light can be concentrated and focused in the color light pattern. In this way, light leakage can be reduced, light source losses can be reduced, and light usage can be increased. In addition, since the reflective layer is disposed on the arc-shaped surface and is located between the colored light pattern and the light-shielding layer, the light emitted by the quantum dots in the colored light pattern in all directions can be concentrated through the reflective layer to improve the light collimation. In this way, the light output efficiency of the color filter can be improved, the problem of light leakage or light mixing can be improved, the color purity can be improved, and the light source loss can be reduced. In addition, the method for manufacturing a color filter according to another embodiment of the present invention can simultaneously form a large-color light pattern through an imprint method, which can further simplify the manufacturing process and reduce the manufacturing time. A display panel according to an embodiment of the present invention and its manufacturing The method includes the above-mentioned color filter, thereby reducing light loss and increasing light usage. In addition, since the light emitted from the colored light pattern can be concentrated through the reflective layer, the light collimation can be improved. In this way, the light output efficiency of the display panel can be improved, the problem of light leakage or light mixing can be improved, the color purity can be improved, the light source loss can be reduced, and the display quality of the display panel can be improved.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (21)

A method for manufacturing a color filter includes: forming a plurality of first color light patterns on a substrate, wherein each of the first color light patterns has an arc-shaped surface; and forming a light-shielding material layer on the first color light patterns. So that the first color light patterns are located between the light-shielding material layer and the substrate; and a plurality of openings are formed in the light-shielding material layer to form a light-shielding layer that respectively exposes the arc-shaped surfaces of the first color light patterns. portion. According to the method for manufacturing a color filter according to item 1 of the patent application scope, before the step of forming the light-shielding material layer, the manufacturing method further includes: forming a reflective material layer on the first color light patterns. The method for manufacturing a color filter according to item 2 of the scope of patent application, further comprising: removing a part of the reflective material layer to form a plurality of reflection patterns, which are respectively located on the arc-shaped surfaces of the first color light patterns and are exposed. The substrate. The method for manufacturing a color filter according to item 3 of the scope of patent application, wherein when the openings are formed, a part of each of the reflection patterns is simultaneously removed to form a plurality of reflection layers respectively located on the first colors. On the arc-shaped surfaces of the light patterns, the reflective layers are substantially located between the arc-shaped surfaces of the first color light patterns and the light shielding layer, respectively. The method for manufacturing a color filter according to item 1 of the scope of patent application, wherein the steps of forming the first color light patterns include: forming a plurality of first color light objects on the substrate by an inkjet printing method; and The first colored light objects are cured to form the first colored light patterns, and the material of each of the first colored light patterns includes a plurality of quantum dots dispersed in a filler. The method for manufacturing a color filter according to item 1 of the scope of the patent application, wherein the steps of forming the first color light patterns include: forming a first color light material layer on the substrate; applying a first mold. Focusing on the first colored light material layer, the first mold has a plurality of first recesses to form a plurality of first colored light objects; and curing the first colored light objects to form the first colored light patterns Each material of the first color light pattern includes a plurality of quantum dots dispersed in a filler. The method for manufacturing a color filter according to item 6 of the patent application scope, wherein before the step of forming the light-shielding material layer, the manufacturing method further includes: forming a plurality of second-color light patterns on the substrate; and forming a plurality of A third color light pattern is on the substrate. The method for manufacturing a color filter according to item 7 of the scope of patent application, wherein each of the third color light patterns is transparent, and the step of forming the second color light patterns includes forming a second color light material layer on the substrate. Using a second mold to apply force to the second colored light material layer, the second mold having a plurality of second recesses to form a plurality of second colored light objects; and curing the second colored light objects to form the A second color light pattern; wherein the steps of forming the third color light patterns include: forming a third color light material layer on the substrate; using a third mold to apply force to the third color light material layer, the third mold has A plurality of third recesses to form a plurality of third color light objects; and curing the third color light objects to form the third color light patterns. The method for manufacturing a color filter according to item 8 of the scope of patent application, further comprising: after the first color light patterns are formed and before the step of forming the second color light patterns, removing the remaining A first colored light material layer; removing the remaining second colored light material layer with a solvent after forming the second colored light patterns and before the step of forming the third colored light patterns; and forming the third colored light patterns After that, the third color light material layer remaining is removed with a solvent. A method for manufacturing a display panel includes: manufacturing a color filter by the method described in any one of the first to the ninth aspects of the patent application scope; providing an active element array arranged relative to the first color light patterns. And providing a light source, wherein the light-shielding layer and the first color light patterns are substantially located between the substrate and the light source. The method for manufacturing a display panel according to item 10 of the scope of patent application, wherein the light source is a blue light source, and the light shielding layer is substantially located between the light source and the first color light patterns. The method for manufacturing a display panel according to item 11 of the scope of patent application, further comprising: forming a liquid crystal layer between the active element array and the color filter, wherein the active element array is located between the light source and the liquid crystal layer. between. A color filter includes: a plurality of first color light patterns disposed on a substrate, wherein each of the first color light patterns has an arc-shaped surface; and a light shielding layer is disposed on the first color light patterns so that the The first color light patterns are located between the light-shielding layer and the substrate. The light-shielding layer has a plurality of openings to respectively expose a part of the arc-shaped surfaces of the first color light patterns. The color filter according to item 13 of the scope of the patent application, further comprising: a plurality of reflective layers disposed on the arc-shaped surfaces of the first color light patterns and exposing the substrate. The color filter according to item 13 of the patent application, wherein each material of the first color light pattern includes a plurality of quantum dots dispersed in a filler. The color filter according to item 13 of the scope of patent application, further comprising: a plurality of second color light patterns on the substrate; and a plurality of third color light patterns on the substrate. The color filter according to item 16 of the patent application scope, further comprising: a plurality of reflective layers disposed on any one of the first color light patterns, the second color light patterns, or the third color light patterns The arc-shaped surface exposes the substrate, wherein the reflective layers are located between any one of the first color light patterns, the second color light patterns, or the third color light patterns, and the light shielding layer. According to the color filter described in claim 16 of the scope of the patent application, the openings respectively expose a part of the second color light patterns and the third color light patterns. A display panel includes: a color filter according to any one of items 13 to 18 of the scope of patent application; an active device array is disposed relative to the first color light patterns; and a light source, wherein The light-shielding layer and the first color light patterns are substantially located between the substrate and the light source. The display panel according to item 19 of the application, wherein the light source is a blue light source, and the light-shielding layer is substantially located between the light source and the first color light patterns. The display panel according to item 20 of the patent application scope further includes a liquid crystal layer between the active element array and the color filter, wherein the active element array is located between the light source and the liquid crystal layer.