Display device

Abstract

A display device includes a first substrate, a color filter conductive structure, a display medium, a second substrate and a common electrode. The second substrate is disposed opposite to the first substrate. The display medium is disposed on the first substrate. The common electrode is disposed on the second substrate. The color filter conductive structure is disposed between the display medium and the common electrode and electrically connected to the common electrode. The display device can maintain the electric field strength for driving the display medium, and avoid the situation that the display quality of the display device is affected due to the poor optical performance caused by the decrease of the electric field strength.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a display device comprising a color filter conductive structure. Background Technology

[0002] Color display devices produce a full-color effect by passing light through a color filter pattern. However, typical color filter patterns have high sheet resistance, and when placed between the pixel electrode and the common electrode, they cause a decrease in the electric field strength driving the display medium, resulting in poor optical performance, such as low contrast, and thus affecting the display quality of the color display device. Summary of the Invention

[0003] At least one embodiment of the present invention provides a display device comprising a color filter conductive structure electrically connected to a common electrode, which can maintain the electric field strength driving the display medium and avoid poor optical performance due to a decrease in electric field strength, such as low contrast, which would affect the display quality of the display device.

[0004] The display device provided in at least one embodiment of the present invention includes a first substrate, a color filter conductive structure, a display medium, a second substrate, and a common electrode. The second substrate is disposed opposite to the first substrate. The display medium is disposed on the first substrate. The common electrode is disposed on the second substrate. The color filter conductive structure is disposed between the display medium and the common electrode and is electrically connected to the common electrode.

[0005] In at least one embodiment of the present invention, the color filter conductive structure includes a conductive layer and a plurality of color filter patterns. The conductive layer is disposed on the display medium and electrically connected to the common electrode. The color filter patterns are formed on the conductive layer and located between the conductive layer and the common electrode.

[0006] In at least one embodiment of the present invention, the conductive layer comprises a transparent conductive layer.

[0007] In at least one embodiment of the present invention, the material of the transparent conductive layer comprises a conductive polymer, indium tin oxide, zinc oxide, indium zinc oxide, carbon nanotubes, silver nanoparticles, or a combination of the foregoing materials.

[0008] In at least one embodiment of the present invention, the first substrate includes a plurality of pixel electrodes, which respectively correspond to the plurality of color filter patterns.

[0009] In at least one embodiment of the present invention, the sheet resistance of the conductive layer is less than 1 MΩ / □.

[0010] In at least one embodiment of the present invention, the sheet resistance of the plurality of color filter patterns is not less than 1 GΩ / □.

[0011] In at least one embodiment of the present invention, the conductive layer comprises a plurality of conductive patterns that are separated from each other.

[0012] In at least one embodiment of the present invention, the color filter conductive structure includes a plurality of color filter conductive patterns, which directly contact the common electrode to electrically connect the common electrode.

[0013] In at least one embodiment of the present invention, the sheet resistance of the plurality of color filter conductive patterns is less than 1 MΩ / □. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of a display device according to at least one embodiment of the present invention;

[0015] Figure 2 This is a partial cross-sectional schematic diagram of the display area of ​​a display device according to at least one embodiment of the present invention;

[0016] Figure 3 This is a partial cross-sectional schematic diagram of the display area of ​​a display device according to at least another embodiment of the present invention;

[0017] Figure 4 This is a partial cross-sectional schematic diagram of the display area of ​​a display device according to at least another embodiment of the present invention.

[0018] [Symbol Explanation]

[0019] 10, 10A, 10B: Display devices

[0020] 100: First substrate

[0021] 200: Color filter conductive structure

[0022] 202, 202A: Conductive layer

[0023] 204: Color Filter Pattern

[0024] 204B: Color-filtered conductive pattern

[0025] 300: Display medium

[0026] 400: Second substrate

[0027] 500: Common Electrode

[0028] CP: Conductive pattern

[0029] d: gap

[0030] AA: Display area

[0031] D1: First Direction

[0032] PA: Surrounding Area Detailed Implementation

[0033] The embodiments of the present invention are discussed in detail below. However, it will be understood that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific contexts. The discussed and disclosed embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] To clearly illustrate the technical features of the present invention, the dimensions of the components in the accompanying drawings are enlarged proportionally, and the number of some components is reduced. Therefore, the description and explanation of the embodiments of the present invention are not limited to the number of components in the drawings or the dimensions and shapes presented by the components, but should cover dimensions, shapes, and deviations from both caused by actual manufacturing processes and / or tolerances. For example, a flat surface shown in the drawings may have rough and / or non-linear characteristics, and an acute angle shown in the drawings may be a rounded corner. Therefore, the components presented in the drawings are primarily for illustrative purposes and are not intended to precisely depict the actual shape of the components, nor are they intended to limit the scope of protection claimed by the present invention.

[0035] Secondly, the terms "approximately," "approximately," or "substantially" used in this invention not only cover explicitly stated numerical values ​​and ranges, but also the permissible deviation range understandable to those skilled in the art, where such deviation range can be determined by errors generated during measurement, which may arise from limitations of the measurement system or process conditions. "Approximately" can indicate a deviation within one or more standard deviations of the aforementioned numerical value, such as ±30%, ±20%, ±10%, or ±5%. The acceptable deviation range or standard deviation used in this invention can be selected based on optical properties, etching properties, mechanical properties, or other properties, and is not applied to all optical properties, etching properties, mechanical properties, and other properties using only one standard deviation.

[0036] The spatial relative terms used in this invention, such as "below," "under," "above," and "above," are for the convenience of describing the relative relationship between one element or feature and another, as illustrated in the figures. The true meaning of these spatial relative terms includes other orientations. For example, when the illustration is rotated 180 degrees vertically, the relationship between one element and another may change from "below" or "under" to "above" or "above." Furthermore, the spatial relative descriptions used in this invention should be interpreted in the same way.

[0037] It should be understood that although the present invention may use terms such as "first," "second," and "third" to describe various elements or features, these elements or features should not be limited by these terms. These terms are primarily used to distinguish one element from another, or one feature from another. Furthermore, the term "or" as used in the present invention may, as appropriate, include any combination of one or more of the associated listed items.

[0038] Furthermore, the present invention can be implemented or applied through other different specific embodiments, and the details of the present invention can also be combined, modified and changed in various embodiments based on different viewpoints and applications without departing from the concept of the present invention.

[0039] Figure 1 This is a top view schematic diagram of a display device 10 according to at least one embodiment of the present invention. Figure 2 This is a partial cross-sectional schematic diagram of the display area AA of the display device 10 according to at least one embodiment of the present invention. Please refer to... Figure 1 and Figure 2 The display device 10 has a display area AA and a peripheral area PA adjacent to the display area AA. The display device 10 includes a first substrate 100, a color filter conductive structure 200, a display medium 300, a second substrate 400 and a common electrode 500. The display medium 300, the color filter conductive structure 200, the common electrode 500 and the second substrate 400 are disposed along the normal (i.e., the first direction D1) of the first substrate 100.

[0040] In detail, a display medium 300 is disposed above a first substrate 100. A color filter conductive structure 200 is disposed above the display medium 300. A common electrode 500 is disposed above the color filter conductive structure 200. A second substrate 400 is disposed above the common electrode 500, and the common electrode 500 is electrically connected to the color filter conductive structure 200. Figure 2The stacked structure of the display device 10 shown can be formed in various combinations of embodiments depending on the actual situation. In one embodiment, a display medium 300 can be formed on a first substrate 100, a color filter conductive structure 200 can be formed on the display medium 300, a common electrode 500 can be formed on a second substrate 400, and the second substrate 400 and the first substrate 100 can be disposed opposite to each other and bonded together. In another embodiment, a display medium 300 can be formed on a first substrate 100, a common electrode 500 can be formed on a second substrate 400, a color filter conductive structure 200 can be formed on the common electrode 500, and finally the second substrate 400 and the first substrate 100 can be disposed opposite to each other and bonded together. The formation method is not limited to this. Since the color filter conductive structure 200 is electrically connected to the common electrode 500, the electric field strength driving the display medium 300 can be maintained, avoiding poor optical performance due to a decrease in electric field strength, such as low contrast, which would affect the display quality of the display device 10.

[0041] For example, the contrast ratio of a color display device with a general color filter pattern having a high sheet resistance disposed between the pixel electrode and the common electrode is reduced by approximately 26% to 31% compared to the contrast ratio of a monochrome display device without the aforementioned general color filter pattern, while the contrast ratio of the display device 10 of the present invention is reduced by approximately 22% to 27% compared to the aforementioned monochrome display device. Therefore, by electrically connecting the common electrode 500 to the color filter conductive structure 200, the present invention can effectively reduce the contrast ratio reduction, thereby improving display quality.

[0042] Please continue reading. Figure 2 The color filter conductive structure 200 includes a conductive layer 202 and a plurality of color filter patterns 204. The conductive layer 202 is disposed on the display medium 300 and electrically connected to the common electrode 500. The color filter patterns 204 may be formed on the conductive layer 202 or on the common electrode 500, and are located between the conductive layer 202 and the common electrode 500.

[0043] In some embodiments, the conductive layer 202 may include a transparent conductive layer, the material of which may include a transparent conductive material, such as a conductive polymer, indium tin oxide, zinc oxide, indium zinc oxide, carbon nanotubes, silver nanoparticles, or a combination of the foregoing materials. The conductive layer 202 may directly contact the common electrode 500 to electrically connect the common electrode 500, or the conductive layer 202 and the common electrode 500 may be connected by a conductive adhesive (not shown) to electrically connect the conductive layer 202 to the common electrode 500.

[0044] It is worth noting that, in order to make the accompanying drawings more concise, Figure 2Nine color filter patterns 204 are shown for illustrative purposes only. However, it is understood that other color filter patterns 204 may be included in areas not shown in the figure. In some embodiments, the colors of these color filter patterns 204 may be red, green, and blue, respectively. The material of the color filter patterns 204 may include color resist.

[0045] In some embodiments, the first substrate 100 and the second substrate 400 are, for example, a glass substrate, a plastic substrate, a silicon substrate, a flexible substrate, or other suitable substrate. Alternatively, the first substrate 100 may be an array substrate, for example, comprising a plurality of pixel electrodes (not shown), a plurality of switching elements (not shown, such as transistors), or other electronic components (not shown, such as capacitors) electrically connected to these pixel electrodes. These pixel electrodes may correspond to the color filter patterns 204 respectively. Specifically, on the normal (i.e., the first direction D1) of the first substrate 100, these pixel electrodes overlap with the color filter patterns 204 respectively.

[0046] In some embodiments, the materials of the common electrode 500 and the pixel electrode may include opaque conductive materials, transparent conductive materials, or combinations thereof. The opaque conductive materials may be metals, such as molybdenum, or metal compounds, such as molybdenum nitride, molybdenum niobate, etc., while the transparent conductive materials may be, for example, indium tin oxide, indium zinc oxide, etc.

[0047] In some embodiments, the sheet resistance of the conductive layer 202 is approximately less than 1 MΩ / □, and the sheet resistance of the color filter pattern 204 is approximately not less than 1 GΩ / □. That is, the sheet resistance of the conductive layer 202 is on the order of approximately KΩ / □, while the sheet resistance of the color filter pattern 204 is on the order of approximately GΩ / □. Although the sheet resistance of the color filter pattern 204 is still relatively high, since the color filter pattern 204 is located between the conductive layer 202 with lower sheet resistance and the common electrode 500, and the conductive layer 202 is electrically connected to the common electrode 500, even if the sheet resistance of the color filter pattern 204 is high, it is not easy to cause a decrease in the electric field strength of the driving display medium 300. Therefore, it is possible to avoid a situation where poor optical performance, such as excessively low contrast, is caused by a decrease in electric field strength, which would affect the display quality of the display device 10.

[0048] In some embodiments, the display medium 300 may be an electrophoretic display layer, but the present invention is not limited thereto. In other embodiments, the display medium 300 may be a liquid crystal display layer, an electrowetting display layer, a liquid powder display layer, etc.

[0049] Figure 3 This is a partial cross-sectional schematic diagram of the display area AA of the display device 10A according to at least one embodiment of the present invention. Please refer to... Figure 3 , Figure 3 Implementation examples and Figure 2 Most of the components in the embodiments are the same in terms of structure, material, and relative positional relationship, and Figure 3 The top view of the display device 10A is essentially the same as... Figure 2 The schematic diagram is a top view of the display device 10, so the same technical features as those shown will not be repeated here. The main difference between the two embodiments is that the conductive layer 202A of the display device 10A includes a plurality of mutually separated conductive patterns CP, which are separated by gaps d, and these gaps d separate the conductive patterns CP from each other. In some embodiments, these conductive patterns CP can serve as touch electrodes, but the present invention is not limited thereto.

[0050] Figure 4 This is a partial cross-sectional schematic diagram of the display area AA of the display device 10B according to at least one embodiment of the present invention. Please refer to... Figure 4 , Figure 4 Implementation examples and Figure 2 Most of the components in the embodiments are the same in terms of structure, material, and relative positional relationship, and Figure 4 The top view of the display device 10B is essentially the same as... Figure 2 The schematic diagram is a top view of the display device 10, so the same technical features as those shown will not be described again here. The main difference between the two embodiments is that the color filter conductive structure 200 of the display device 10B includes a plurality of color filter conductive patterns 204B.

[0051] In detail, these color-filtering conductive patterns 204B can be formed on the display medium 300 or on the common electrode 500, and directly contact the common electrode 500 for electrical connection. Similarly, the plurality of pixel electrodes of the first substrate 100 can respectively correspond to these color-filtering conductive patterns 204B. That is, on the normal (i.e., the first direction D1) of the first substrate 100, these pixel electrodes respectively overlap with these color-filtering conductive patterns 204B.

[0052] In some embodiments, the materials of these color filter conductive patterns 204B may include dyes and conductive polymers, carbon nanotubes, silver nanoparticles, or mixtures of the aforementioned materials. The sheet resistance of these color filter conductive patterns 204B is approximately less than 1 MΩ / □, that is, the sheet resistance of these color filter conductive patterns 204B is on the order of approximately KΩ / □. Because the sheet resistance of the color filter conductive patterns 204B is low and they are electrically connected to the common electrode 500, even if the color filter conductive patterns 204B are disposed between the pixel electrode and the common electrode 500, they are unlikely to cause a decrease in the electric field strength of the driving display medium 300. Therefore, it is possible to avoid situations where poor optical performance, such as excessively low contrast, due to a decrease in electric field strength affects the display quality of the display device 10B.

[0053] In summary, the present invention maintains the electric field strength of the driving display medium by electrically connecting the common electrode through a color filter conductive structure, thus avoiding poor optical performance due to a decrease in electric field strength, such as excessively low contrast, which would affect the display quality of the display device.

[0054] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A display device, characterized in that, include: First substrate; A display medium is disposed on the first substrate; A second substrate is disposed opposite to the first substrate; A common electrode is disposed on the second substrate; as well as A color-filtering conductive structure is disposed between the display medium and the common electrode, and is electrically connected to the common electrode.

2. The display device as claimed in claim 1, characterized in that, The color filter conductive structure includes: A conductive layer is disposed on the display medium and electrically connected to the common electrode; and Multiple color filter patterns are formed on the conductive layer and located between the conductive layer and the common electrode.

3. The display device as claimed in claim 2, characterized in that, The conductive layer includes a transparent conductive layer.

4. The display device as claimed in claim 3, characterized in that, The material of the transparent conductive layer includes conductive polymers, indium tin oxide, zinc oxide, indium zinc oxide, carbon nanotubes, silver nanoparticles, or combinations of the foregoing.

5. The display device as claimed in claim 2, characterized in that, The first substrate includes a plurality of pixel electrodes, each of which corresponds to a plurality of color filter patterns.

6. The display device as claimed in claim 2, characterized in that, The sheet resistance of the conductive layer is less than 1 MΩ / □.

7. The display device as claimed in claim 2, characterized in that, The sheet resistance of the plurality of color filter patterns is not less than 1 GΩ / □.

8. The display device as claimed in claim 2, characterized in that, The conductive layer comprises multiple conductive patterns that are separated from each other.

9. The display device as claimed in claim 1, characterized in that, The color-filtering conductive structure includes multiple color-filtering conductive patterns, which directly contact the common electrode to electrically connect to the common electrode.

10. The display device as claimed in claim 9, characterized in that, The sheet resistance of the plurality of colored filter conductive patterns is less than 1 MΩ / □.

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