TWI364597B - Color liquid crystal display and method for displaying color image on the same - Google Patents

Description

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达达编号号: TW3673PA IX. Invention: 1. The present invention relates to a color liquid crystal display element and a display method thereof, and particularly relates to a long service life and low cost. A color liquid crystal display element and a display method of the color image thereof. [Prior Art] Since the liquid crystal display (LCD) φ has the characteristics of thin volume, light weight, low power consumption, and no radiation pollution, it has been widely used in recent years and has gradually replaced a bulky screen (CRT). Applications for liquid crystal display components include small-sized portable information products such as personal digital assistants (PDAs), general-sized notebook computers, or desktop LCD screens. In addition, large-size liquid crystal display products, such as 30-inch LCD TVs, have gradually gained attention and have a place in the market. Color liquid crystal display elements can produce red, green, and blue light in a number of different ways. For example, in a backlight module, use a red LED with a green and blue phosphor, or use a blue LED with a red and green fill material, or use a white light source. (for example, UV light) with red, green, and blue fill materials, or with blue light-emitting diodes with yellow phosphorescent materials. However, the first two methods have low luminous efficiency, and the use of white light sources has the problem of not easily optimizing the color of the image, especially the use of UV light as a white light source, which is expensive and not suitable for mass production, and the liquid crystal molecules are in UV light. It also accelerates degradation under illumination. 1364597

Three Miscellaneous: TW3673PA Therefore, the current color liquid crystal display elements use red light-emitting diodes to produce red, green and blue light by means of yellow phosphorescent materials. Fig. 1 is a schematic cross-sectional view showing a conventional color liquid crystal display element. The conventional color liquid crystal display element 1 has a backlight module 10, the backlight module 10 has a blue light emitting diode 1〇1, and the blue light emitting diode 101 is coated with a yellow phosphorescent material (Yellow). The blue light-emitting diode 1^ can be used to display white light as a display: the back can also include other guide plates, expansion plates/films, and lenses (Lens) known to those skilled in the art. After the blue light is generated by the yellow phosphorescent material 1〇2, the polarizing layer 12 and the thin film transistor array layer (4) show that each element in the element reaches the green color and the color is checked. 16 and red, the wave plate 162 and the blue chopper plate i liquid ^ chip =, the white light of the layer Γ 6 passes through the red wave plate 161, from the liquid helium layer 15 into the filter 'wave color filter 163 filter, Sub-, color ^ skin (10) and blue polarizing layer above the wave layer 16 =,, first, green and blue light, and to determine the light can be in a certain polarization direction; ^ polarizing layer 12 is relatively set, The liquid crystal display element 1 including the two directly connected to the two has many disadvantages, and is directly coated on the blue hair. Diode ⑷ "snail point, and deterioration due to overheating '= eight light phosphorescent material 4 by the yellow light to the photosensitive material squatting ⑽ who first white King, its full frequency band 1364597

: The TW3673PA spectrum passes through the liquid crystal layer'. Therefore, it is difficult to make the color change at the same time when designing the component, and the color shift is generated at the same time, and a serious problem is easily generated at a large viewing angle. _ Γ. SUMMARY OF THE INVENTION The present invention relates to a color liquid crystal display element and a color image display method thereof, which can extend the life of the light source and save the production process.

According to a first aspect of the present invention, a color liquid crystal display element is provided, wherein the display element has a plurality of halogen elements, and each of the color pixels, the green sub-study, and the blue color c-red one Spear 7 [Pan people. The display element comprises: an upper plate structure; a lower plate structure; a liquid crystal layer having a plurality of crystal molecules, and disposed between the upper plate structure and the lower plate structure; and the backlight module is located in the lower plate structure Below and emit blue light. The upper plate structure includes an upper polarizing layer and a filter layer. The filter layer is located above the upper polarizing layer, and the filter layer comprises a layer of -a yellow phosphorescent material. The yellow phosphorescent two-layer system in each element corresponds to the position of the red sub-pixel and the position of the green sub-halogen. The lower plate structure comprises: a lower polarizing layer disposed opposite to the upper polarizing layer; and a thin film transistor array layer on the lower polarizing layer. When the blue light of the backlight module sequentially passes through the lower polarizing layer, the thin film transistor array layer, the liquid crystal layer, the upper polarizing layer and the filtering layer, red, green and blue light can be generated. According to a first aspect of the present invention, a color liquid crystal display device is further provided, comprising: a backlight module; a plurality of material layers are located above the backlight module; and a blue light passes through the material layers, and the materials Layer to 1364597

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Sanda number: TW3673PA includes a liquid crystal layer and a filter layer on the liquid crystal layer; a plain color phosphor layer. The material layer is located in the filter layer, and the position of the yellow monument material layer and the red color in each of the halogen elements Corresponding to the position of the green scorpion, and blue

The position of the element is not a layer of yellow scale material. In each of the I ^ l animals, the blue light passes through the yellow phosphorescent material layer and the filter layer of red quercetin and green quercetin to produce red and green light; while the blue light passes directly through the blue sputum filter layer. After the blue light is displayed. According to a second aspect of the present invention, a color image display method for a color liquid crystal display element φ is provided, comprising: causing a blue light emitting diode in a backlight module to emit blue light; and controlling liquid crystal molecules in the liquid crystal layer to make The blue light selectively passes through the liquid crystal layer; the blue light passes through a filter layer to respectively generate red light and green light, and the neutral light passes through the positions corresponding to the positions of the red scorpion and the green sulphur; The layer, and the position of the blue sub-halogen, does not have the yellow filling material layer, and the blue light directly passes through the region corresponding to the blue sub-halogen in the ferro-wave layer to generate blue light. In order to make the above-mentioned contents of the present invention more comprehensible, the following description of the preferred embodiments and the accompanying drawings will be described in detail below. [Embodiment] The present invention provides a color liquid crystal display device and The display method of its color image. The color liquid crystal display element is mainly composed of a liquid crystal layer (including a plurality of liquid crystal molecules) disposed on the upper plate and the lower plate structure.

The Sanda number is TW3673PA and the backlight module is placed under the lower plate structure to provide the light source required for the display components. The invention uses a blue light source in the backlight module, and is matched with a yellow phosphorescent material and a red filter layer and a green filter layer to generate red light, green light and blue light, and the yellow phosphorescent material is located in the upper polarizing layer of the upper plate structure. The upper part is thus not deteriorated by the influence of the heat generated by the light source. The display element produced in accordance with the present invention is not only inexpensive but also has a long service life, and the blue-light passing element can reduce the bias of the large-view character. In addition, the design of the component only needs to be optimized for the blue light. The color liquid crystal display elements of the first and second embodiments are set forth below as an explanation of the present invention. However, the display elements set forth in the examples are for illustrative purposes only and do not limit the scope of the invention to be protected. Furthermore, the illustrations in the embodiments also omit unnecessary elements in order to clearly show the technical features of the present invention. Embodiments Fig. 2 is a schematic cross-sectional view showing a color liquid crystal display according to a first embodiment of the present invention. The color liquid crystal display element 2 has a backlight wedge set 20, and the backlight module 20 has a blue light emitting diode 2〇1 for emitting blue light as a backlight of the display element. The backlight module 2 can also include other components (not shown) known to those skilled in the art, such as a light guide plate that guides light from the light source toward the display panel, for collecting, diffusing, softening or uniform brightness. Multiple diffusing films, aligning lenses for light (Lens) and reflective films that enhance the efficiency of light reflection. Blue emitted by the blue LED 2〇1 in the backlight module 20 1364597 » «

The Sanda number: TW3673PA light passes through the lower partial layer 22, the thin film transistor array layer, the crystal layer 25, and the upper polarizing layer 27 to reach the chopper layer 29. The upper polarizing layer 27 and the lower polarizing layer 22 of the liquid allow blue light to pass in a certain polarization direction. Each of the elements of the display element 2 is surrounded by a sputum (R), a green sputum (G), and a blue sub-both, and a color-human swearing (B). The filter layer 29 located above the light layer 27 has a yellow phosphorous material yellow (Yellow Phosphor) 291, and each of the yellow phosphorescent button layer 291 and red quercetin (R) ) position and green secondary protein (g 枓

. The position corresponding to the blue sub-pixel (8) is yellow; the yellow layer: the filter layer 29 corresponding to the photon (G), and the red film and the green filter 295 are respectively located in the yellow Phosphorescent material layer 29ι. However, the position corresponding to the blue sputum (B) does not have a blue cross. Additionally, the wave layer 29 may preferably include - transparent security. To cover all the red calender sheets 293 and the green filter, the color filling material layer 29 is covered. The transparent protective layer 297 can also be subjected to special treatment (for example, increasing surface roughness to scatter light) to increase the viewing angle of the blue sub-tin (B): when the blue light emitted by the blue light-emitting diode 201 passes through red sputum (R) In the region, the yellow phosphorescent material layer 291^ corresponding to R is first excited by the red calender sheet 293 to generate red light. Similarly, when the blue light passes through the area of the green sub-pixel (G), the main layer corresponding to g is excited first, and the material layer 291 is filtered by the green filter 295 to generate light. As for the area of blue sub-halogen (B), after the blue self-luminous diode 2〇1 is issued, 1364597

Sanda number: TW3673PA passes directly through the transparent protective layer 297. Second Embodiment Fig. 3 is a cross-sectional view showing a color liquid crystal display element in accordance with a second embodiment of the present invention. The color liquid crystal display element 3 includes a backlight module 30, and the backlight module 30 has a blue light emitting diode 3〇1, which emits blue light as a backlight of the display element. The blue light emitted by the blue light-emitting diode 301 sequentially passes through the lower polarizing layer 32, the thin film transistor array layer 34, the liquid crystal layer 35, and the upper polarizing layer 37 to reach the wave layer 39. The chopping layer 39 located above the upper polarizing layer 37 has a yellow phosphor layer 39 and a yellow disc light material layer 391 in each of the alizarins and the position of the red sub-halogen (R). The position of the green sub-pixel (G) corresponds. The position corresponding to the blue quercetin (8) does not have a yellow scale material layer. Different from the first embodiment, in the second embodiment, the red filter 393 is set only on the filter layer 29 corresponding to the red sub-tennin (R) of each element. The green filter and the blue filter are not provided at positions corresponding to the green sub-pixel (6) and the blue sub-pixel (8), respectively. Additionally, the wave mask layer 39 may preferably include a transparent protective layer 397, to cover all of the red color filter 393 and the yellow phosphor material layer 391. The transparent protective layer 397 can also be specially treated (e.g., increased surface roughness to illuminate the light) to increase the viewing angle of the green sub-tennin (G) and the blue sub-study (b). When the blue light emitting diode 301 emits blue light through the red 昼 12 1364597

Three nickname: TW3673PA The region of the prime (R) first excites the yellow phosphorescent material layer 391 corresponding to R and then - after being filtered by the red calendering sheet 393, red light is generated. When the blue light passes through the region of the green sub-halogen (G), the yellow phosphorescent material layer corresponding to G is excited first, and then the transparent protective layer 297 is passed to generate a yellowish green light. In the region of the color-adjusting element (B), the blue-light self-luminous diode 3〇1 is directly passed through the transparent protective layer 397. Compared with the first embodiment, the structure proposed in the second embodiment omits the green filter. Since the composition of the yellow phosphorescent material has a slight green phosphorous light component, the blue light of the second embodiment passes through the green color. After the yellow phosphorescent material 391 in the halogen (G) region, a yellowish green light can be produced. Therefore, in actual application, if the display element to be manufactured can display a vivid green display image, the structural aspect of the first embodiment can be selected; if the display element to be manufactured is to display a green element of the image The yellow-colored hue can be selected as the structural aspect of the second embodiment. According to the above two embodiments, the display element and the display method thereof according to the present invention have the following advantages: (1) The use of inexpensive yellow phosphorescent material can reduce the cost; '(2) Yellow luminescent material system It is located above the upper polarizing layer, so it is not affected by the heat generated by the light source, which can increase the service life of the light source. (3) Only the blue light source is needed in the backlight module, which can save cost and is convenient in production; (4) Only the blue light passes through the component, which can reduce the dominant role of the big view 1364597

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Sanda number: TW3673PA shape; . (5) Designing components only needs to be optimized for blue light, thus reducing the difficulty of optimizing color; and (6) yellow fill material is excitation light, different from The filter material of the filter layer is known, so the transmittance of the display element will increase. In the above, although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention. Those skilled in the art having the knowledge of the present invention can make various modifications and refinements 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.

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三达编号·- TW3673PA [Simple description of the drawing] Fig. 1 is a schematic cross-sectional view showing a conventional color liquid crystal display element. Fig. 2 is a schematic cross-sectional view showing a color liquid crystal display element not according to the first embodiment of the present invention. Fig. 3 is a schematic cross-sectional view showing a color liquid crystal display element not according to the second embodiment of the present invention. [Description of main component symbols] 1, 2, 3: color liquid crystal display elements 10, 20, 30. Backlight modules 101, 201, 301: blue light emitting diodes 102, 291, 391: yellow disc light materials 12, 22 32: lower polarizing layer 14, 24, 34: thin film transistor array layer 15, 25, 35: liquid crystal layer 、 16, 29, 39 · filter layer 161, 293, 393: red filter 162, 295: green filter Sheet 163: blue filter sheets 18, 27, 37: upper polarizing layers 297, 397: transparent protective layer 15

Claims (1)

1364597 月曰1 TW3673PA_la 申十, the scope of application for patents: 1. A color liquid crystal display element, which has a plurality of pixels, and • each element includes a red secondary protein, a green secondary protein and a blue The color display element comprises: an upper plate structure comprising: an upper polarizing layer; and a filter layer disposed above the upper polarizing layer, the filtering layer comprising: a layer of yellow phosphorescent material, wherein the pixel is The layer of yellow phosphorescent material corresponds to only the position of the red sub-halogen and the position of the green sub-halogen, and the filter layer comprises a filter layer on the yellow phosphor layer material, each of which is 5 ha The enamel sheet has no blue enamel sheet; the lower plate structure comprises: a lower polarizing layer disposed opposite to the upper polarizing layer; and a thin film transistor array layer on the lower polarizing layer; The liquid sa layer includes a plurality of liquid crystal molecules disposed between the upper plate structure and the lower plate structure; and a backlight module disposed below the lower plate structure and emitting blue light. 2. The display element of claim 1, wherein the light-receiving sheet layer in each element comprises at least one red calender sheet. 3. The display element of claim 2, wherein the filter layer in each pixel further comprises a green filter. 16 1364597 TW3673PA-丨 "Shen Fu & Amendment 4. If applying The display element of claim 1, wherein the filter layer in each pixel comprises only one red filter. 5. The display element of claim 1, wherein the filter layer further comprises a transparent protective layer on the upper polarizing layer and covering the filter layer and the yellow phosphor layer. 6. The display element of claim 1, wherein the backlight module comprises a blue LED. 7. A color liquid crystal display element, comprising: - a backlight module emitting blue light; a plurality of layers of material located above the backlight module, wherein the blue light passes through the material layers, and the material layers comprise at least one liquid crystal layer And a filter layer on the liquid crystal layer; a yellow phosphor layer in the filter layer, and the position of the yellow phosphor layer in each pixel corresponds to the position of the red sub-tin and the green sub-pixel And the position of the blue sub-pixel does not have the yellow phosphor layer; a light-receiving layer, the yellow scale layer material in the ferro layer, and the filter corresponding to the blue sub-pixel position The layer does not have a blue color filter; in each pixel, the blue light passes through the yellow phosphorescent material layer of the red sub-tendin and the green sub-pixel, the filter layer and the filter layer, and red and green light are generated. The blue light directly passes through the filter layer of the blue sub-pixel to generate blue 1364597 TW3673PA_la application & correction light. 8. The display element of claim 7, wherein the five-color filter layer in each pixel comprises at least one red fluorescent sheet. 9. The display element of claim 8, wherein the light-receiving sheet layer in each element further comprises a green filter. 10. The display element of claim 7, wherein the filter layer in each pixel comprises only one red filter. 11. The display device of claim 7, wherein the material layers further comprise: a first polarizing layer 'on the backlight module and below the liquid crystal layer; and a second polarizing layer Located above the liquid crystal layer and below the filter layer. 12. The display element of claim 11, wherein the material layers further comprise: a thin film transistor array layer between the first polarizing layer and the liquid crystal layer. 13. The display element of claim 11, wherein the undulation layer further comprises a transparent protective layer on the second polarizing layer and covering 1364597 TW3673PA_1SI to apply for & A filter, a light sheet layer and the yellow scale material layer. 14. The display element of claim 7, wherein the backlight module comprises a blue LED. 15. A color image display method for a color liquid crystal display device, comprising: causing a blue light emitting diode in a backlight module to emit blue light; controlling liquid crystal molecules in the liquid crystal layer to selectively pass blue light a liquid crystal layer that causes blue light to pass through a filter layer to generate red and green light, respectively, wherein at least a portion of the blue light passes through a layer of yellow filler material corresponding to the positions of the red quercetin and the green quercetin and is located at the yellow fill a filter layer on the material layer, and the position of the blue sub-pixel does not have the yellow phosphor layer and the filter layer, and part of the blue light directly passes through the region of the filter layer corresponding to the blue sub-halogen After the blue light is produced. 16. The display method of claim 15, wherein the blue light passes through the polarizer before the blue light passes through the filter layer. 17. The display method according to claim 15, wherein when the blue light passes through the filter layer, at least part of the blue light passes through the yellow filler material layer and a red phosphor film corresponding to the position of the red sub-halogen. To produce red light. The display method of claim 17, wherein at least part of the blue light passes through the yellow phosphor layer corresponding to the position of the green sub-halogen when the blue light passes through the filter layer. And a green filter to produce green light. 19. The display method of claim 17, wherein when the blue light passes through the filter layer, at least a portion of the blue light passes through the yellow fill material layer corresponding to the location of the green sub-halogen, to produce green light. 20