TWI352857B - Liquid crystal display module - Google Patents

Description

F51950i69TW 22676t\vf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display module (LCM), and more particularly to an omnidirectional mirror (omni-directional reflector) liquid crystal display module. [Prior Art] Since the liquid crystal display panel of the liquid crystal display itself cannot emit light, it is necessary to provide a backlight module under the liquid crystal display panel to provide a light source, thereby achieving the display function. In general, the light source used in the liquid crystal display can use an electroluminescence device (EL device), a light emitting diode (LED), or a cold cathode fluorescent tube (CCFL). Or the use of short-wavelength light such as blue light, ultraviolet light, etc. to stimulate the luminescence of the luminescent material, etc., because the use of short-wavelength light to illuminate the fluorescent material has a simple structure and low cost, which is the focus of future development of the liquid crystal display. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a conventional liquid crystal display using ultraviolet light-excited fluorescent light as a light source. Referring to FIG. 1, the liquid crystal display 1 includes an ultraviolet backlight module 110, a phosphor layer 120, and a liquid crystal display panel U0. The liquid crystal display panel 130 includes a first substrate 132, a second substrate 134, and a liquid crystal layer 136. The first substrate 132 is disposed opposite to the second substrate 134, and the liquid crystal layer 136 is disposed on the first substrate 132 and the second substrate 134. between. As can be seen from FIG. 1, the phosphor layer 120 is disposed on the second substrate 134' and the phosphor layer 120 includes a red phosphor layer 122, a 1352857 P51950169TW 22676iwf.doc/n

A layer of green phosphor material 124 and a layer of blue phosphor material 126. The ultraviolet backlight module 11 is disposed under the first substrate 132. The ultraviolet light emitted by the light source 112 of the ultraviolet backlight module 110 passes through a light guide plate 114 and is reflected by a reflective plate 116 toward the liquid crystal display panel 130. Direction shot. The ultraviolet light entering the liquid crystal display panel 130 excites the phosphor material layer 120' to cause the phosphor material layer 120 to emit visible light. In detail, an active device 132a on the first substrate 132 can control one of the pixel electrodes 132b disposed above the active device 132a, and between the pixel electrode 132b and a common electrode 134& disposed on the second substrate 134. An electric field is generated to control the alignment of the liquid crystal layer 136. The intensity of the ultraviolet light passing through the liquid crystal layer 136 is different under the action of electric fields of different intensities. In other words, the phosphor layer 丨2〇 located above the different halogen electrodes 132b is subjected to ultraviolet rays of different intensities and emits different colors of light. In this way, the liquid crystal display can achieve the full color display function.

The above-mentioned phosphor material layer 120 and the ultraviolet backlight module 11 can provide a light source required for the liquid crystal display, but since the ultraviolet light is irradiated to the phosphor layer 120, only a part of the ultraviolet light excites the phosphor material. The layer 12 is, and the ultraviolet light that does not excite the phosphor layer 120 passes through the phosphor layer 120 and is emitted to the outside of the liquid crystal display. In this way, not only the efficiency of the fluorescent two-layer layer 120 is low, but also the high-energy ultraviolet light overflow can harm the safety of the user or cause damage to the object around the liquid crystal display: [Invention] The present invention provides a liquid crystal. A display module that increases the UV utilization of the P6I950i69Tw 22676twf.doc/n and reduces UV spillover. In order to solve the above problems, the present invention provides a liquid crystal display module, which comprises a moonlight module, a liquid SB display panel, a camping light material layer and a omnidirectional mirror. The backlight module is adapted to emit a first light having a first wavelength. The liquid crystal display panel is disposed above the backlight module. A layer of phosphor material is disposed over the backlight mode, wherein the layer of phosphor material is excited by the first light: a second light having a second wavelength is emitted. The omnidirectional mirror is disposed above the backlight module, wherein the phosphor layer is located between the backlight module and the omnidirectional mirror, and the omnidirectional mirror reflects the first light and allows the second light to pass. In an embodiment of the invention, the backlight module is a direct-on backlight module or a side-in-light backlight module. In an embodiment of the invention, the first ray is a non-visible light and the second ray is a visible light. In an embodiment of the invention, the non-visible light comprises ultraviolet light. In an embodiment of the invention, the liquid crystal display panel comprises a transmissive liquid crystal display panel or a transflective liquid crystal display panel. In one embodiment of the invention, the phosphor material layer is a phosphor material layer... a second material material and a third camp material. Wherein the first-light-emitting material layer, the second camping light material layer and the third light-emitting material layer are formed as __′, and the light material layer, the second luminescent material layer and the second working light material layer are excited by the first light. Different face lines will be issued separately. / π In the embodiment of the present invention, the first camping material layer is red (5) 2857 p51950169T\V 22676tVrf.doc/n phosphor material layer, and the second phosphor material layer is green phosphor material layer. And the third layer of phosphor material is a layer of blue phosphor material. In a consistent embodiment of the invention, the phosphor layer comprises a layer of a light-emitting material. In one embodiment of the invention, the composite phosphor layer comprises a first phosphor material, a second phosphor material, and a third phosphor material.

In an embodiment of the invention, the omnidirectional mirror is located between the backlight module and the liquid crystal display panel. In an embodiment of the invention, the liquid crystal display panel includes a first substrate, an active device array, a second substrate, a common electrode, and a liquid crystal layer. The active device array is disposed on the first substrate. The second substrate is disposed above the first substrate. The common electrode is disposed on the second substrate. The liquid crystal layer is disposed between the active device array and the common electrode.曰

In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the backlight module, and the omnidirectional mirror is disposed between the first substrate and the phosphor layer. In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the backlight module, and the omnidirectional mirror is disposed between the first substrate and the active device array. In an embodiment of the invention, the phosphor layer is disposed between the „substrate and the backlight module, and the omnidirectional mirror is disposed between the active device array and the liquid crystal layer. In an embodiment of the invention The luminescent material layer is disposed between the first substrate and the backlight module, and the omnidirectional mirror is disposed between the liquid crystal layer and the electrode of the common body. In one embodiment of the present invention, the fluorescent material layer is disposed between the liquid crystal layer and the electrode for use in a total of 8 1352857 P51950I69TW 22676lwf.doc/n. The luminescent material layer is disposed between the first substrate and the backlight module, and the omnidirectional mirror is disposed between the common electrode and the substrate. In an embodiment of the invention, the phosphor layer is disposed. The first substrate and the backlight module are disposed, and the omnidirectional mirror is disposed above the second substrate.

In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed between the active device array and the phosphor layer. In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed between the active device array and the liquid crystal layer.

In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed between the liquid crystal layer and the common electrode. In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed between the common electrode and the second substrate. In an embodiment of the invention, the phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed above the second substrate. In an embodiment of the invention, the phosphor material layer is disposed between the common electrode and the second substrate, and the omnidirectional mirror is disposed on the glory material layer 9^5135〇i69Tw 22676twf.doc/n and the second substrate between. In an embodiment of the invention, the phosphor layer is disposed between the common electrode and the second substrate, and the omnidirectional mirror is disposed above the second substrate. In an embodiment of the invention, the phosphor material layer and the omnidirectional mirror are disposed above the second substrate. In the present invention, the fluorescent material layer comprises a composite photo-material layer. In one embodiment of the town-invention, the composite phosphor layer comprises - a light-emitting material, a second luminescent material, and a - third light material. In the embodiment, the liquid crystal display panel further includes a color filter layer and a color filter layer disposed on the common electrode and the second substrate. The liquid crystal display module of the present invention has a reflective surface. The light is anti-bribery' and the layer of fluorescent material (four) secret group and all-round ϊ ϊ =! Therefore, the first ray of the layer of phosphor material is not excited (the short wave is reflected by the omnidirectional mirror. That is, having it is limited between the backlight module and the omnidirectional mirror, and = is also repeated to stimulate money The second layer of light is generated by the layer of light material (for example, the invention can not only fully utilize the utilization ratio of the first line of the backlight module) but also reduce the damage caused by the first light overflow. The features and advantages can be more and more detailed. The following is a detailed description of the car, and the following is a detailed description of the following: 1352857 P51950169TW 22676twf.doc/n [Embodiment] The first embodiment FIG. 2 is the present invention The liquid crystal display module 200 of the first embodiment includes a backlight module, a group 210, a liquid crystal display panel 300, a phosphor layer 220, and a whole. The azimuth mirror 230. The liquid crystal display panel 300 can be a transmissive liquid crystal display panel or a transflective liquid crystal display panel, including a relatively disposed φ - a first substrate 310 and a second substrate 330, wherein the first Substrate 310 An active device array 320 is disposed, and a halogen electrode array 360 is disposed on the active device array 320, and the second substrate 330 is disposed with a common electrode 340. Further, a first substrate 310 and the second substrate 330 are disposed between the first substrate 310 and the second substrate 330. The liquid crystal layer 350. The backlight module 210 can be a direct-lit backlight module or a side-input backlight module, and only the side-input backlight module is illustrated in FIG. 2. As can be seen from FIG. 2, the light source 212 A first light ray 240 having a first wavelength is emitted, and the first light ray φ 240 is emitted toward the liquid crystal display panel 300 by a light guide plate 214 and a reflective plate 216. In addition, the backlight module 210 can be further There is an optical film group 218 disposed above the light guide plate 214 to make the first light 240 entering the liquid crystal display panel 300 more uniform. The first light 240 can excite the fluorescent material layer 220 to emit the fluorescent material layer 220. " a second light having a second wavelength (not shown). The omnidirectional mirror 230 is disposed above the backlight module 210, and the phosphor layer 220 is disposed between the backlight module 210 and the omnidirectional mirror 230. Between Full reflection mirror 230, for example, using a one-dimensional photonic crystal (〇ne_dimensional photonic 11 1352857 P5 i 950169TW 22676twf.doc / n crystal) or periodic art thin film stack (peri〇dicthin_fllmstack) technical production.

In this embodiment, the phosphor layer 22 is disposed between the first substrate 310 and the active device array 320, and the omnidirectional mirror 23 is disposed between the camping material layer 220 and the active device array 320. . The omnidirectional mirror 230 can reflect the first light 24' having the first wavelength and allow the second light having the second wavelength to pass, so the omnidirectional mirror 230 can reflect the first light of the unexcited phosphor layer 220. 240. Specifically, the first light 240 may be non-visible light, such as ultraviolet light, and the second light may be visible light, such as red, green, blue, white light or the like. The first ray 240 excites the phosphor layer 22 〇 and causes the phosphor layer 220 to emit a second ray, and the omnidirectional mirror 23 反射 reflects the first ray 240 of the unexcited phosphor layer 220 and causes the second Light passes through. In short, the omnidirectional mirror 230 of the embodiment allows the visible light emitted by the phosphor layer 220 to be seen by the user, and can limit the ultraviolet light to the backlight module 2 and the omnidirectional reflection. Between mirrors 230 to avoid ultraviolet light

overflow. The liquid crystal display module 200 has an omnidirectional mirror 230 that can reflect the first light 240 and pass the second light, and the fluorescent material layer 220 is located between the backlight module 210 and the omnidirectional mirror 230. Thus, the first ray 240 of the unexcited glazing material layer 220 is reflected by the omnidirectional mirror 230 but the first ray can pass through the omnidirectional mirror 230. In this way, not only the efficiency of use of the first light 240 but also the damage caused by the overflow of the first light 240 can be reduced. 12 1352857 P51950169TW 22676twf.doc/n In this embodiment, the phosphor material layer 220 includes, for example, a -μ-" material layer 222, a second phosphor layer 224, and a 荣-^ glory layer 226, wherein - The layer of the glazing material 222, the second glazing material and the third layer of luminescent material 226 are arranged in an array, and after being excited by the first ray 240, different colors of light can be emitted. In detail, the first fluorescent material layer 222, the second fluorescent material layer 224, and the third fluorescent material layer 226 may be a red fluorescent material layer, a green fluorescent material layer, and a blue fluorescent material layer, respectively. The red phosphor material layer, the green phosphor material layer, and the blue phosphor material layer are staggered. The active device array 32A can drive the denier electrode array 360 to generate an electric field between the halogen electrode array 360 and the common electrode 340. The electric field can control the optical axis direction of the liquid crystal molecules in the liquid crystal layer 350, thereby controlling the first firefly. The light emitted from the photo material layer 222, the second phosphor layer 224, and the third phosphor layer 226 respectively passes through the intensity of the liquid crystal display panel 300. In this way, different ratios of red, green, and blue light can be mixed to achieve the display function. In addition, the above-mentioned phosphor material layer 220 and the omnidirectional mirror 230 ® are disposed between the backlight module 210 and the liquid crystal display panel 300, but those skilled in the art may also adopt other configurations. In another embodiment, a different arrangement of the phosphor layer and the omnidirectional mirror will be described. Embodiment 3A is a cross-sectional view showing a liquid crystal display module according to a second embodiment of the present invention. It is to be noted that in the second embodiment and the first embodiment, the same or similar component numbers denote the same or similar elements. 2 and FIG. 3, the present embodiment is substantially the same as the first embodiment, and the differences between the two embodiments of the present invention will be described in detail below, and the same portions will not be described again.

The difference between the embodiment and the first embodiment is that the phosphor layer 220 in the liquid crystal display module 200a is disposed between the second substrate 330 and the common electrode 340, and the omnidirectional mirror 230 is disposed in the second The substrate 330 is between the fluorescent material layer 220. In the liquid crystal display module 200a, the first light 240 emitted by the backlight module 210 first passes through the liquid crystal layer 350, and then the phosphor layer 220 is excited to cause the phosphor layer 220 to emit a second light (visible light).

3B to 3N are cross-sectional views showing other arrangements of a phosphor material layer and an omnidirectional mirror in a liquid crystal display module according to a second embodiment of the present invention. Referring to FIGS. 3B to 3N, the arrangement of the phosphor layer 220 and the omnidirectional mirror 230 may be other than that described in the above embodiments. The present invention is not limited thereto. For example, the phosphor layer 220 can be disposed between the first substrate 310 and the backlight module 21〇, and the omnidirectional mirror 230 can be disposed between the phosphor layer 22〇 and the first substrate 31〇 ( As shown in FIG. 3B), between the first substrate 31A and the active device array 32A (as shown in FIG. 3C), between the active device array 32A and the liquid crystal layer 35A (as shown in FIG. 3D), and a liquid crystal layer. Between 350 and the common electrode 340 (as shown in FIG. 3E), between the common electrode 34A and the second substrate 33A (as shown in FIG. 3F) or above the second substrate 330 (as shown in FIG. 3G). In addition, the phosphor layer 220 can also be disposed between the first substrate 31 and the active element array 320, and the omnidirectional mirror 23 can be disposed between the phosphor layer 220 and the active device array 32A ( As shown in FIG. 3H), between the active element array 320 and the liquid crystal layer 350 (as shown in FIG. 31), the liquid 2857 1950169TW 22676〇vf.doc/n - the first fluorescent material layer 222b, a second firefly The light material layer 224b and the second light camping material layer 226b.

In this embodiment, the first phosphor material layer 222b, the second phosphor layer 224b, and the third phosphor layer 226b are emitted by the first light 240, and the second light is, for example, white light, and the active device. The array 320 can control the first phosphor material layer 222b, the second phosphor material layer 224b, and the third phosphor material layer 226b to emit the intensity of the second light, thereby controlling the second light to enter the red filter layer 372b and the green filter, respectively. The strength of layer 374b and blue filter layer 376b. In this way, different ratios of red, green, and blue light can be mixed to achieve the display function. _ fourth embodiment

Figure 5 is a cross-sectional view showing a liquid crystal display module in accordance with a fourth embodiment of the present invention. It is to be noted that in the fourth embodiment and the third embodiment, the same or similar reference numerals denote the same or similar elements. 4 and FIG. 5, the present embodiment is substantially the same as the third embodiment, and the differences between the two embodiments will be described in detail below, and the same portions will not be described again. The difference between this embodiment and the third embodiment is that the phosphor layer 220b in the liquid crystal display module 200c is disposed between the color filter layer 370b and the common electrode 340, and the omnidirectional mirror 230 is disposed in the color. The filter layer 370b is between the second substrate 330. In the liquid crystal display module 2〇〇c, the first light 240 emitted by the backlight module 210 first passes through the liquid crystal layer 350' to excite the fluorescent material layer 220b, so that the fluorescent material layer 220b emits, for example, white light. Two rays. In summary, the liquid crystal display module of the present invention has an omnidirectional mirror capable of reflecting the first light and passing the second light, as compared with the conventional technology, 16 1352857 P5I950169TW 22676twf doc/π. The first light that excites the layer of phosphor material is reflected by the omnidirectional mirror, but the second light passes through the omnidirectional mirror. In short, the omnidirectional mirror of the embodiment allows the visible light emitted by the phosphor layer to pass through and be seen by the user, and can limit the ultraviolet light between the backlight module and the omnidirectional mirror to Avoid UV light spills. So, not only can improve

The efficiency of use of the first light can also reduce the damage that may be caused by the first light spill. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the scope of the present invention, and it is possible to make some modifications and changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. [Simple description of the map]

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a conventional liquid crystal display using ultraviolet light-excited fluorescent light as a light source. 2 is a cross-sectional view showing a liquid crystal display module according to a first embodiment of the present invention. Figure 3A is a cross-sectional view showing a liquid crystal display module in accordance with a second embodiment of the present invention. 3B to 3N are cross-sectional views showing other arrangements of the luminescent material layer and the omnidirectional mirror in the liquid crystal display module of the second embodiment of the present invention. 4 is a cross-sectional view showing a liquid crystal display module according to a third embodiment of the present invention. Figure 5 is a cross-sectional view showing a liquid crystal display module in accordance with a fourth embodiment of the present invention. 17 1352857 P51950i69T\V 22676twf.doc/n [Main component symbol description]

100: liquid crystal display 110: ultraviolet backlight module 112: light source 114: light guide plate 116: reflection plate 120: fluorescent material layer 122: red fluorescent material layer 124: green fluorescent material layer 126: blue fluorescent material layer 132: first substrate 132a: active device array 132b: halogen electrode array 134: second substrate 134a: common electrode 136: liquid crystal layer 200, 200a, 200b, 200c: liquid crystal display module 210: backlight module 212: light source 214 : Light guide plate 216: Reflector plate 218: Optical film set 220, 220b: Fluorescent material layer 18 1352857 P51950169TV / 22676twf.doc, 'η 222, 222b: First fluorescent material layer 224, 224b: Second fluorescent material Layer 226, 226b: third fluorescent material layer 230: omnidirectional mirror 240: first light 300, 300b: liquid crystal display panel 310: first substrate

320: active device array 330: second substrate 340: common electrode 350: liquid crystal layer 360: pixel electrode array 370b: color filter layer 372b: red filter layer 374b: green filter layer 376b: blue filter layer

19

Claims (1)

1352857 — ί00:8^ a... The eclipse of the eclipse is replaced by the page 10. The scope of the patent application: 1. A liquid crystal display module comprising: a backlight module adapted to emit a first light having a first wavelength; a liquid crystal display panel disposed above the backlight module; a phosphor layer disposed above the backlight module, wherein the phosphor layer is excited by the first light to emit a second having a second wavelength An omnidirectional mirror disposed in the liquid crystal display panel or on the two sides of the liquid crystal display panel, wherein the phosphor layer is located between the backlight module and the omnidirectional mirror. And the omnidirectional mirror reflects the first light and allows the second light to pass. 2. The liquid crystal display module of claim 1, wherein the backlight module is a direct-lit backlight module or a side-into-light backlight module. 3. The liquid crystal display module as claimed in claim </ RTI> wherein the first light is - non-visible light and the second light is - visible light. 4. The liquid crystal display module of claim 3, wherein the non-visible light comprises ultraviolet light. The liquid crystal display module of the first aspect of the present invention, wherein the panel comprises a transmissive liquid crystal display panel or a transflective liquid crystal display panel. The liquid crystal display module according to Item 1, wherein the phosphor material layer comprises: τ a first phosphor layer; 20 1352857 ~&quot;ί()0-8-9乂铎 丨 a second layer of phosphor material; and a third layer of phosphor material, wherein the first layer of phosphor material, the layer of second phosphor layer and the layer of third phosphor layer are arranged in an array, and The first camping light material layer, the second f-light material layer and the third phosphor material layer are respectively excited by the first light to emit light of the same color. The liquid crystal display module of the sixth aspect, wherein ^ ^ first phosphor layer, and the second phosphor remaining The layer is a green luminescent material layer, V., R and the second phosphor material layer is a blue fluorescing layer. The liquid crystal display module of claim 1, wherein the fluorescent material layer, the composite fluorescent material-second fluorescent material, and the liquid crystal display module according to a third fluorescent item, wherein the patent application scope The first layer of phosphor material comprises a composite layer comprising a first phosphor material and a material. 9' The patent liquid crystal display panel comprises: a first substrate; On the second substrate; and H is disposed between the active device array and the common electrode, the liquid βββ display module, wherein the first substrate and the backlight module are between the king and the Brother-;w between the first substrate and the active device array. 21 1352857 i λ 100-8-9 * · ---- *ί ^ U. The liquid crystal display mold according to claim 9 of the patent application, ΐφ the phosphor material layer is disposed on the first substrate and the backlight Between the modules, the omnidirectional mirror is disposed between the active device array and the liquid crystal layer. The liquid crystal display module of claim 9, wherein the fluorescent material layer is disposed between the first substrate and the backlight module, wherein the omnidirectional mirror is disposed on the liquid crystal layer Between this and the common electrode. The liquid crystal display module of claim 9, wherein the fluorescent material layer of Lu Yiqin is disposed between the first substrate and the backlight module, wherein the omnidirectional mirror is disposed in the common Between the electrode and the second substrate. The liquid crystal display module of claim 9, wherein the luminescent material layer is disposed between the first substrate and the backlight module, and the omnidirectional mirror is disposed above the second substrate. The liquid crystal display module of claim 9, wherein a side phosphor layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed on the active device array Between the camping light material layers. The liquid crystal display module of claim 9, wherein the phosphor material layer is disposed between the first substrate and the active device array, and the omnidirectional mirror is disposed on the active device The array disk is between the liquid crystal layers. The liquid crystal display module of claim 9, wherein the phosphor layer is disposed on the first substrate and the active device array, and the omnidirectional mirror is disposed on the liquid crystal layer Between the common electrodes. The liquid crystal display module of claim 9, wherein 22 1352857 the fluorescent material layer is disposed on the first substrate and the active device, and the omnidirectional mirror is disposed on the common electrode and the first 19. In the case of the liquid crystal _ ^^ described in claim 9 of the patent application, the layer of the luminescent material is disposed on the first substrate and the active device = ' ^ and the omnidirectional mirror configuration Above the second substrate. The liquid crystal display module of claim 9, wherein the phosphor material layer is disposed between the common electrode and the second substrate, wherein the Lu-Qin, the omnidirectional mirror is disposed on The phosphor material layer is between the second substrate. The liquid crystal display module of claim 9, wherein the phosphor layer is disposed between the common electrode and the second substrate, and the omnidirectional mirror is disposed above the second substrate . The liquid crystal display module of claim 9, wherein the phosphor material layer and the omnidirectional mirror are disposed above the second substrate, and are as described in claim 9 The liquid crystal display module, wherein the phosphor layer comprises a composite phosphor layer, and the composite phosphor layer comprises a -th-fluorescent material, a second phosphor material, and a third phosphor material. . The liquid crystal display module of claim 23, wherein the liquid crystal panel member further comprises a color filter layer, and the color filter layer is disposed between the common electrode and the second substrate . twenty three