TWI364595B - Trans-reflective type lcd panel and electronic device using the same - Google Patents

Description

1364595

'三达号: TW3297PA « IX. Description of the Invention: [Technical Field] The present invention relates to a semi-transparent liquid crystal display panel and an electronic device therefor, and in particular to a semi-transparent type with good light utilization efficiency The liquid crystal display panel and the electronic device to which it is applied. [Prior Art] The color effect of various liquid crystal displays today is mainly by applying a color resin color filter to a substrate to form a color filter, and controlling the liquid crystal in the display panel when the display is turned on. The reverse direction and angle of the molecule to adjust the brightness of the backlight through the liquid crystal layer, and the color filter is used to filter the color to control the display color. Of course, the backlight can be adjusted at any time in the normal mode when the backlight of the display is turned on. The size of the source does not cause a bad display effect. However, in the case of a transflective liquid crystal display, this type of display turns off its backlight in the reflective mode, and only uses an external light source for display, due to the color filter resin. The material is translucent. • The light must pass through the color filter on the substrate twice before it will be projected. This process will lose the intensity of the light, which will reduce the light transmittance of the display and the reflectivity is poor. Affects the display of the display in reflective mode. SUMMARY OF THE INVENTION The present invention provides a semi-transparent liquid crystal display panel and an electronic device therefor, wherein the substrate of the display panel has a multi-color filter of at least four colors 1364595

Sanda number: TW3297PA 'structure, and each filter layer of the multi-color filter structure has an opening corresponding to the reflective area on the substrate, so that the reflectivity of the multi-color filter structure is increased, and the optical filter is set at the opening The light element can help to change the light transmission spectrum, impart coloration at the opening, and display a color image in the reflective mode. According to the present invention, there is provided a liquid crystal display panel comprising a first substrate, a second substrate and a liquid crystal layer. The first substrate is disposed in parallel with the second substrate, and the liquid crystal layer is encapsulated between the first substrate and the second substrate, the first substrate includes a plurality of reflective portions, and the second substrate includes a multi-color filter junction j冓, the multi-color The filter structure comprises a plurality of color filter layers of at least four colors, each of the color filter layers having an opening corresponding to a reflection portion. According to the present invention, there is further provided a liquid crystal display panel comprising a first substrate, a second substrate, a plurality of optical filter elements, and a liquid crystal layer. The first substrate is disposed in parallel with the second substrate, and the liquid crystal layer is encapsulated between the first substrate and the second substrate. The first substrate includes a plurality of reflective portions, and the substrate includes a plurality of hips. i—J fll I IM _ .. - color filter structure, the multi-color filter structure comprises a plurality of color filter layers of at least four colors, each of the color filter layers having an opening corresponding to a reflection portion, and the optical filter element Then set in the opening. According to the present invention, an electronic device includes a liquid crystal panel and a light source module. The light source module is disposed on one side of the liquid crystal panel. The liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate is disposed in parallel with the second substrate, and the liquid crystal layer is encapsulated between the first substrate and the second substrate, the first substrate includes a plurality of reflective portions, and the second substrate includes a multi-color filter structure, the multi-color filter The structure includes a plurality of color filter layers of at least four colors, each of the color filter layers having an opening corresponding to one of the reflection portions. 6 1364595

The above-mentioned features and advantages of the present invention are more apparent and easy to understand. The following description of the preferred embodiments and the accompanying drawings will be described in detail as follows: [Embodiment] For the first embodiment, please refer to 1A to 1B, FIG. 1A is a cross-sectional view of a transflective liquid crystal display panel according to a first embodiment of the present invention, and FIG. 1B is an enlarged schematic view showing a single pixel structure of the display panel of FIG. 1A. As shown in FIG. 1A, the transflective liquid crystal display panel 1 includes a first substrate 11 and a second substrate 12, and the first substrate 11 and the second substrate 12 are disposed in parallel with a liquid crystal layer interposed therebetween. The first substrate 11 includes a plurality of reflective portions 13 , the second substrate 12 includes a multi-color filter structure 14 , and the multi-color filter structure 14 includes a plurality of color filter layers of at least four colors. The multi-color filter structure 14 has at least one red filter layer 141, a green filter layer 142, a blue filter layer 143 and a yellow filter layer 144 as an example. Each color filter layer has An opening is disposed in correspondence with a reflecting portion 13, for example, openings (141A to 144A) on the respective filter layers respectively correspond to one reflecting portion 13. Taking a single crystal structure of green as an example, as shown in FIG. 1B, there is an overlapping area (the range indicated by d) between the reflecting portion 13 and the green filter layer 142, and a backlight L1 is first. Projected on the side of the substrate 11 , the area of the overlapping area is substantially smaller than the area of the green filter layer 142; in the reflective mode, if the area of the overlapping area is zero (d=0), the opening 142A and the reflecting part are represented. 13 sizes are consistent, so when the external light source is 7 1364595 * .

Sanda number: TW3297PA, when L2 penetrates the opening 142A and is reflected by the reflecting portion 13, it will only have a black-and-white display effect. However, if the area of the overlapping portion is not zero (0<d<D)' represents the reflecting portion The area of 13 is larger than the opening 142A, and part of the reflection portion 13 overlaps with the green light-emitting layer 142. Therefore, when the external light source L2 is reflected by the reflection portion 13, part of the light source L3 penetrates the green filter layer 142 and is projected. (displays green) 'Therefore, even in the case of reflection, the color display effect can be obtained, and the design relationship of the filter layer opening of the other colors and the reflection portion is also the same. As shown in FIG. 1A, the display panel 1 includes an upper polarizing plate 15 and a lower polarizing plate 16 respectively disposed on the outer sides of the first substrate H and the second substrate 12. The first substrate 11 includes a first bottom plate 17 and is transparent. The electrode 18 and the reflecting portion 13 are disposed on the surface of the transparent substrate 1 which is different from the surface of the first substrate 17. The first substrate 11 can be a thin film transistor substrate, and the transparent electrode 18 can be a halogen electrode. The second substrate 12 includes a second bottom plate 19 and a transparent electrode 20. The multi-color filter structure 14 can be a color filter, and the second substrate 12 can be a color filter. The transparent electrode 20 can be a common electrode, and the second substrate 12 is provided with at least one cover layer 21 covering one surface of the multi-color filter structure 14 for protecting the multi-color filter structure 14 and opening the substrate. After 141A~144A are filled in, the spacing between the two substrates is relatively flat. The reflection portion 13 of the first embodiment can be disposed not only on the surface of the transparent electrode 18, but also in Fig. 2A, which is a cross-sectional view in which the reflection portion is disposed between the transparent electrode and the first substrate. 8

: Number No. - TW3297PA • As shown in Fig. 2A, in actual use, the reflecting portion 13 may be disposed on the surface of the first bottom plate 17, and the transparent electrode 18 may be coated on the reflecting portion 13, and the outer circumference. Referring again to FIG. 2B, a cross-sectional view of the cover layer filling only the opening is shown. 'As shown in FIG. 2B, the display panel 1 (not labeled in the drawing) includes a plurality of cladding layers 21 for filling in. The opening 142A, however, can also directly dispense with the use of the cladding layer. Please refer to FIG. 2C, which is a cross-sectional view showing the second substrate of FIG. 1B without a coating layer. As shown in the % diagram, the transparent electrode 2G can be directly formed on the surface of the multi-color phosphor structure μ of the second substrate 12. Although the first embodiment has a multi-color phosphor structure 14 having red and green dichromatic colors and yellow filter layers 141 to 144, the S = of the filter layer is changed, for example, a multi-color phosphor structure. ^, work color green, basket color and cyan filter layer, 戋 is 纟 # blue: cyan and yellow and other multi-color 遽 light layer. $疋,·工色,外,: The second is t is a four-color light-emitting structure ^Fig., Fig. 4 is a cross-sectional view of a light-emitting layer with five colors. For example, the green, blue color light-emitting structure 14' having a light-emitting layer of six colors, for example, includes a red, multi-color light-emitting structure as shown in Fig. 4, and purple phosphor layers 141 to 146. Blue, yellow, cyan and = plus its light transmittance: open = = = = open count 'The display panel will also have a set of 1364595 in reflective mode

* Sanda number: TW3297PA • Embodiment 2 The display panel 2 of the second embodiment differs from the display panel 1 of the first embodiment (as shown in FIG. 1A) in the design of the color filter layer opening, and other The same elements will be used with the same reference numerals and will not be described again here. Referring to FIG. 5, a cross-sectional view of a transflective liquid crystal display panel according to a second embodiment of the present invention is shown. As shown in FIG. 5, the display panel 2 includes a plurality of optical filter elements 31-34. The coating layers 21 are applied to the openings 141A to 144A of the respective color filter layers 141 to 144, and the coating layer 21 is applied to the entire multi-color filter structure 14. The optical filter elements 31 to 34 individually correspond to the reflection portion 13, The optical filter elements 31 to 34 may be configured to sandwich a gap layer between the two metal layers. The material and thickness of the metal layer and the gap layer may affect the light transmission characteristics of the optical filter elements 31 to 34. After passing through the optical filter elements 31 to 34, there are different penetration spectra. Since the color filter layers 141 to 144 are respectively red, green, blue, and yellow, the structure, material, and thickness are transmitted through the optical filter elements 31 to 34. The design is such that after the light source penetrates the optical filter elements 31 to 34, the colors corresponding to the color filter layers 141 to 144 are respectively displayed, and the material of the metal layer is, for example, silver or silver alloy, and the gap layer is, for example, A dielectric layer or a metal conductive oxide layer. Each of the optical filter elements 31 to 34 includes two metal layers as a reflective layer, and the gap layer between the two metal layers has different thicknesses, because the two parallel reflective layers and the gap layer having different thickness distributions A plurality of single-cavity Fabry-Perot chopper structures can be constructed, and a single-chamber Fabry-Perot filter structure having different gap layer thicknesses can interfere with visible light. For example, when the gap between two parallel reflective layers is small (ie 1364595

When the MM No.: TW3297PA 'gap layer thickness> is an integral multiple of the incident half-wavelength (λ/2), constructive interference is generated and a high-resolution light wave of a narrow wavelength range is output, so that the gap layer is adjusted. The thickness of the single-chamber Fabry-Perot filter structure outputs the center wavelength of the maximum transmittance to determine the visible light color that passes through the optical filter elements 31-34 as red, green, and blue. And yellow. For the setting of the covering layer 21, please refer to the 6th to 6th drawings. The sixth drawing shows a cross-sectional view in which the covering layer is only filled in the opening, and the sixth drawing shows that the second substrate has no coating layer. A cross-sectional view. The 6th to 6th drawings are only diagrams showing the single element structure of the panel. As shown in Fig. 5, although the cover layer 21 covers the entire multicolor filter structure 14, it is actually possible to fill only the opening as shown in Fig. 6. Alternatively, the use of the cladding layer 21 is omitted, and as shown in Fig. 6, the transparent electrode 20 is directly plated on the multicolor filter structure 14 and the optical filter element 31 (and the optical filter elements 32 to 34). Since the color of each color filter layer is different, the optical filter element can change the transmission spectrum of the light to display the desired color by the film structure, thickness and material design of the optical filter element*. The optical filter element is disposed in the opening, and the opening of each color filter layer has coloring property, so that the display panel 2 can still display the color surface in the reflective mode, and the optical filter element has good light transmittance. If an optical filter element is provided at the opening, the light utilization efficiency in the reflection area can also be increased to increase the reflectance of the display panel 2. 11 1364595

Sanda Number: TW3297PA Embodiment 3 This embodiment describes an electronic device using the transflective liquid crystal display panel of the first embodiment or the transflective liquid crystal display panel of the second embodiment. Please refer to FIG. 7 , which is a schematic diagram of an electronic device according to Embodiment 3 of the present invention. As shown in FIG. 7 , the electronic device 700 has a display panel 1 such as a notebook computer, a mobile phone or other electronic instruments. Device. The electronic device 700 is also used in conjunction with a light source module. The display panel 1 of the first embodiment is exemplified. The light source module is preferably disposed on the first substrate 11 of the display panel 1 (see the 1A) side to provide a light source for display panel 1. The transflective liquid crystal display panel and the electronic device of the same according to the above embodiments of the present invention, by designing a multi-color filter structure having an opening on a substrate of the display panel, and correspondingly reflecting regions on the other substrate The opening is arranged such that the display panel can increase the transmittance of light in the reflective mode, increase the reflectivity of the light, design by the size of the opening and the reflective area, or configure an optical filter having a light transmission spectrum at the opening. The light* component allows the display panel to display a color surface in reflective mode. In addition, due to the excellent light transmittance of the optical filter element, the display panel has excellent color in both normal mode and reflective mode. saturation. In view of the above, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the invention, and the present invention may be made without departing from the spirit and scope of the invention. Various modifications and adaptations are made, therefore, the scope of the invention is defined by the scope of the appended claims. 12 1364595

'Sanda Number: TW3297PA' BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a cross-sectional view showing a transflective liquid crystal display panel according to a first embodiment of the present invention. Fig. 1B is a schematic view showing a single pixel structure of the display panel of Fig. 1A. Fig. 2A is a cross-sectional view showing the reflection portion disposed between the transparent electrode and the first substrate. FIG. 2B is a cross-sectional view showing only the flat opening of the slope coating. • Fig. 2C is a cross-sectional view showing that the second substrate does not have a slope coating. Fig. 3 is a cross-sectional view showing a filter layer having five colors in a multicolor filter structure. Fig. 4 is a cross-sectional view showing a filter layer having six colors in a multicolor filter structure. Fig. 5 is a cross-sectional view showing a transflective liquid crystal display panel according to a second embodiment of the present invention. FIG. 6A is a cross-sectional view showing that the coating is only filled in the opening. ® Figure 6B shows a cross-sectional view of the second substrate without a slope coating. Fig. 7 is a view showing an electronic device according to a third embodiment of the present invention. 13 1364595

Sanda number: TW3297PA [Description of main component symbols] 1, 2: Semi-transparent liquid crystal display panel 11: First substrate 12: Second substrate 13, 13': Reflecting portions 14, 14', 14'': Multicolor Filter structure 15: upper polarizing plate 16: lower polarizing plate • 17 · first bottom plate 18, 20 · transparent electrode 19 · second bottom plate 21, 21', 31: slope layer 30 · optical filter element 141: red filter layer 142: green filter layer 143: blue filter layer® 144: yellow filter layer 145: cyan calender layer 146: purple filter, light layer 141A, 142A, 143A, 144A: opening 700: Electronic device L1: backlight L2: external light source

Claims (1)

13,64595 Correction of the replacement page on August 30, 100. Patent application scope: 1. A transflective liquid crystal display panel comprising: a first substrate having a plurality of reflecting portions; a second substrate; The first substrate is disposed in parallel, and the second substrate comprises a multi-color filter structure, the multi-color filter structure comprises a plurality of color filter layers of at least four colors, each of the color filter layers having an opening corresponding to each other a plurality of optical filter elements are respectively disposed in the openings, and each of the optical filter elements has a gap layer between the two metal layers; and a liquid crystal layer is located at the Between a substrate and the second substrate. 2. The display panel of claim 1, wherein the second substrate further comprises at least one cladding layer covering the multi-color filter structure. 3. The display panel of claim 1, wherein the second substrate further comprises a plurality of layers to fill the openings. 4. The display panel of claim 1, wherein each of the reflection portions has an overlapping area corresponding to each of the color filter layers, and an area of the overlapping area is smaller than an area of each of the color filter layers. 5. The display panel of claim 1, wherein the first substrate comprises a first substrate and a transparent electrode, and the reflective portions are disposed on a surface of the transparent substrate different from the first substrate. 6. The display panel of claim 1, wherein the first substrate comprises a first substrate and a transparent electrode, and the reflective portion is disposed between the transparent electrode and the first substrate. 15 100 August 30 曰Revision replacement page This ^·,=Please refer to the display panel described in item 1, where:: color: f light layer at least includes - red light layer, - green light Layer, color filter layer and a yellow filter layer. 8. The display panel of claim i, wherein the 4-color light-receiving layer comprises at least a red light-emitting layer, a green light-emitting layer, a blue color filter layer and a cyan filter layer. The display panel according to the above aspect of the invention, wherein the shirt color layer comprises at least a red county layer, a blue filter layer, a cyan filter layer and a yellow filter. Floor. The display panel of claim 1, wherein the color filter layers comprise at least a red filter layer, a green filter layer, a blue filter layer, and a cyan filter. Light layer and a yellow filter layer. The display panel of claim 10, wherein the color filter layers further comprise at least one purple filter layer. 12. The display panel of claim 1, further comprising a light source module disposed on one side of the first substrate or the second substrate.