TWI342433B - - Google Patents

Description

IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and an electric excitation surface light source device used in the backlight module; in particular, the present invention is provided for cooperation with a liquid crystal display panel The backlight module used, and the electric excitation surface light source device used by the backlight module. [Prior Art] #光模块 is widely used in liquid crystal display devices, computer keyboards, mobile phone buttons, advertising billboards, and other devices that require a light source to provide the planar light source required for such devices. In particular, in recent years, the market demand for liquid crystal display devices has grown substantially. In order to meet the requirements for the appearance and appearance of liquid crystal display devices, the design of backlight modules used in liquid crystal display devices has become increasingly diversified. In general, the backlight module used for the liquid crystal display device needs to have a good uniformity of the output light source so that the development effect of the liquid crystal display device is checked. Traditionally, the backlight module is mainly divided into two types: side light type and direct type. In the edge-lit backlight group, since the lamp system is disposed on one side or both sides of the module, it is necessary to set the light guide plate Φ on the light guide plate. This is a high degree of lightness in the position of the gas-curing near-light tube, which causes a problem of insufficient uniformity. In the direct-lit backlight module, a plurality of lamps are arranged side by side directly below the light-emitting surface, and a diffusion plate is disposed thereon to divide the light emitted by the lamps. However, due to the limited effect of the diffuser plate, the brightness of the light near the position of the lamp is still higher than that of other positions. In addition, since the diffusing plate has a certain thickness and it is provided with a fixed space, the (4) diffusing plate causes the thickness of the back domain group to be increased, and the assembly process is more complicated. In order to solve this problem, f knows the technical _-type flat tube, as shown in Figure la 7 lb. Such a flat lamp tube is provided with a light-transmissive gas chamber wall 35 on the substrate 2, and a gas chamber 71 is provided. Next, the inert gas and mercury are injected into the gas 71, and the electrode 5G is applied to both ends of the gas chamber to illuminate the flat tube by the cold cathode shot = light village. The light source emitted by this meter is more uniform than the lamp. However, since the main light source of such a flat lamp is a milk, it is still impossible to avoid a dark band having a low brightness between adjacent cells 71. SUMMARY OF THE INVENTION One object of the present invention is to provide a backlight module having a brightness of output light of a more uniform sentence. Heat, another object of the present invention is to provide a backlight module that simplifies the assembly process and saves assembly time. Another object of the present invention is to provide an electrically activated surface light source device having a relatively uniform output light brightness. Another object of the present invention is to provide an electrically activated surface light source for the generation of less dark bands. The backlight module of the present invention mainly comprises an electric excitation surface light source. The electric excitation surface light source device comprises a t-layer substrate, a plurality of upper gas chamber walls and a plurality of lower gas chamber walls, and the upper air chamber wall and the middle substrate have light penetrability. The upper air chamber wall and the lower air chamber wall are respectively disposed on the opposite first side and the second side of the intermediate substrate, and respectively have a plurality of upper air chambers and a plurality of lower air chambers. The upper chamber wall has a convex outer surface. In the preferred embodiment, both the upper and lower air chambers are provided with a primary emulsion and a discharge strip, while the outer portion is provided with a pair of external electrodes. When the external electrode applies a voltage to the upper and lower air chambers, the upper and lower air chambers emit light. A spacer is formed between adjacent upper chamber walls, and a position of the lower chamber wall corresponds to a space between the upper chamber walls. When the electrically excited surface light source device emits light, the light from the upper air chamber is directly emitted outward through the upper air chamber wall. The light from the lower chamber passes through the intermediate substrate and is emitted outward from the spacer. Therefore, the lower air chamber can be used to provide a relatively uniform light source in the space between adjacent air chambers. [Embodiment] The present invention provides a backlight module and an electro-acoustic surface light source device used in the backlight module. In the case of the hybrid embodiment, the back button is used for the liquid crystal display 2 board. However, in various embodiments, the backlight module can also be used for computer keys, swaying telephone seams, kanbans, and other devices that require planar light. In the preferred embodiment, the tree shingle backlight is equipped with a backlight source for providing a liquid crystal display panel. In the embodiment shown in FIG. 2, the backlight module mainly comprises a lower casing (10), an anti-electricity=), a Weifa shouting position, a light_dirty upper shell_. The only two-side light source device _ and the reflecting plate (10) are disposed in the T casing 190, Π. The umbrella (10) is located on the electro-excitation surface light source device 300 and the lower casing (10), and the pre-membrane 170 and the upper-150 are sequentially disposed above the electric excitation surface light source assembly 1342433. The optical film 17 described herein includes a film such as a brightness enhancement film and a polarizing film. In various embodiments, the backlight module can also be provided with a diffusion plate between the optical film 17 and the electrically-excited surface light source device 300 for better light uniformity. In addition, as shown in FIG. 2, when the backlight module of the present invention is used in conjunction with the liquid crystal display panel 130, the liquid crystal display panel is disposed above the optical film π and the upper body 150. The panel frame no is disposed on the liquid crystal display panel no and covers the backlight module below. The electro-excitation surface light source device 300 preferably produces a light source by means of a cold cathode ray method; however, in various embodiments, the electro-excitation surface light source device 3 can also generate filaments by other illuminating methods of the hot cathode nucleus. As shown in FIGS. 3 & and FIG. 3b, the electro-excitation surface light source device 300 includes a middle substrate 31A, a plurality of upper chamber walls 35A, and a plurality of lower chamber walls 370. The intermediate substrate 31 has a first surface 31A and a second surface 312. In this embodiment, the first face 311 is a side corresponding to the optical film, and the second face 312 is corresponding to one face of the reflective plate 180. In addition, the intermediate substrate 310 is light transmissive and is preferably made of glass; however, in other embodiments, the intermediate substrate 310 may also be made of quartz glass or other light transmissive inorganic or organic materials. to make. A plurality of upper air chamber walls 350 are respectively connected to the first surface 3n of the intermediate substrate 31. In the embodiment as shown, the upper air chamber walls 350 are elongated and distributed side by side on the first side 311 of the intermediate substrate 310. However, in various embodiments, the upper plenum wall 35 can also have other different shapes and be distributed differently on the first face 311 of the intermediate substrate. For example, the upper air chamber walls 35〇 may be distributed on the intermediate substrate 31〇 in a concentric ring manner or in a matrix arrangement. This 8 1342433 two mothers = air chamber wall coffee are all convex outside the table _. In the preferred embodiment, the outer surface 351 shown in Fig. 4 has a circular arc cross section. In this embodiment, the upper air chamber wall is an elongated structure, so that the outer surface 351 is an isolated surface of two columns. The design of the outer surface 351 is to contribute to the light output = "and in different respects, as shown in Fig. 5, the outer surface 351 is also a curved surface of the + stellite body, and has a cross section containing (4).

Above, the wall-cafe is light-transmitting, and is preferably made of glass. In the case of the poor case, the upper chamber wall 350 can also be made of quartz glass or other inorganic or organic materials. The core-shaped electric excitation surface light source device deletes the light, that is, the tooth-permeable upper air chamber wall 35〇, and is externally transmitted through the outer surface, as shown in FIG. 4, and the upper air chamber wall 35 is formed together with the middle substrate 31〇. Upper = chamber 71 = in this embodiment, because the upper chamber wall is a long knot

Therefore, the upper air chamber 710 is a space of a semi-cylindrical body. However, in the embodiment shown in Fig. 5, the upper air chamber 71G is a space of a polygonal cylinder. Since the electro-excitation surface light source device _ preferably adopts a cold cathode nucleus method to generate a light source, the upper air chamber training is better for the health of the seam and the electric shock. The above inert ruthenium system may be helium, neon, argon, Wei or other 'If gas; the discharge vapor is preferably formed by voltage ionization of mercury or helium. ... as shown in Fig. 3a, the outer surface of the upper air chamber wall is provided with a pair of external electrodes _ as above. The outer electrode (10) is more rigidly covered on the outer surface such as the corresponding end; however, in various embodiments, the inner electrode extending outward from the upper chamber HQ may also be employed. Further, as shown in Fig. 4, the inner wall 8 9 1342433 of the upper chamber wall is coated with a luminescent material layer 353. The luminescent material layer 353 preferably comprises an organic or inorganic = luminescent powder such as a sulfur scaly compound. When the discharge vapor is electrically excited to generate ultraviolet light, the luminescent material layer 353 is excited to emit visible light. When the light passes out through the upper air chamber wall 35G to the periphery, the space between the adjacent upper air chamber walls 350 is opposite to the space 390 where the upper air chamber 710 emits light. In the embodiment shown in FIG. 3a, in the embodiment, the space between the adjacent upper air and the wall 350 has a rectangular shape and the upper air chamber wall. 350 intervals.

In the preferred embodiment, as shown in Figure 4, a plurality of upper plenum walls 350 are joined together to form an upper plenum wall layer. The upper chamber wall layer is superposed on the first surface 311 of the intermediate substrate 310. In a preferred embodiment, the upper air chamber wall layer can be formed on the first surface 311 of the intermediate substrate 3 ι by means of injection molding, money etching, mold forming, etc., and together with the middle substrate 31 形成 form a plurality of upper gas chambers. . In the embodiment, in the embodiment, the interval between adjacent upper air chambers 71G still exists: as shown in FIG. 3b and FIG. 4, a plurality of lower air chamber walls 37 are respectively connected to the second layer 312 of the middle layer. And corresponding to the position of the leg f between the adjacent upper chamber wall. In the implementation of the butterfly 3b, the lower chamber walls are arranged in a strip shape on the second side 312 of the intermediate substrate 31, so as to correspond to the strip and the intergranular __. However, the shouting is not __, the lower wall 370 and the distribution of the financial compartment and the reading & wall are distributed in a concentric ring or in a matrix arrangement: layer 2 The cloth is also arranged in a concentric ring or matrix arrangement. The lower chamber wall is said to correspond to the shape and distribution of the spacers, and 8 10 1342433 is distributed on the second surface 312 in a (four) ring or matrix arrangement.

The middle to the wall 3?G each have a convex outer surface 371. In the preferred embodiment I' as shown in Figure 1, the outer surface 371 has a circular arc cross section. In this embodiment, the main breast to the wall 370 is an elongated structure, so that the outer surface 371 is -=. In different embodiments, as shown in FIG. 5, the outer surface 2 can be + The arc of the edging cylinder has a cross section with a chamfered corner. In addition, 2: the upper air chamber outer surface 351 and the lower air chamber are said to have a circular arc cross section; however, the outer air chamber wall 350 outer surface 351 of the lower wall 370 outer surface 371 does not necessarily have The same shape or section Γ. The lower chamber wall 350 is preferably light transmissive, and is preferably made of glass, and in other embodiments t, the upper chamber wall coffee can also be made of quartz glass or Made of miscellaneous inorganic or organic materials. When the electric excitation surface light source device is activated, the light that penetrates the lower chamber wall 37 can be deflected to the fresh m via the reflection 1 of the reflector (10). However, in different embodiments,

150 can also be light impenetrable; in other words, when the electric excitation surface light source is equipped with (4) light, the wall chambers that are directed to the lower air chamber are reflected to other directions. As shown in Fig. 4, the lower chamber wall 37 is combined with the intermediate substrate 31 to form a lower chamber 730. In this embodiment, since the lower air chamber wall 37 is a long-length structure, the lower air chamber TM is a space of a semi-cylindrical body. However, in the embodiment of Figure 5, the lower chamber is the space of a polygonal cylinder. The lower air chamber paste is supplied, filled with 'newton' and used to accommodate discharge steam. The above inert gas system may be helium gas II gas, argon gas, gas gas or other inert gas; the discharge vapor is preferably formed by ionization of mercury or helium gas by voltage.

11 1342433

As shown in Fig. 3b, a pair of external electrodes 5GG are disposed on the outer surface 371 of the lower chamber wall 370. The outer electrode is preferably placed in pairs to cover the corresponding end of the milk of the outer surface; however, in various embodiments, the inner electrode extending outwardly from the lower chamber may also be employed. Further, the inner wall of the lower air chamber wall 3?q is coated with a luminescent material layer 353. The luminescent material layer 353 preferably comprises an organic or inorganic glazing powder, such as a zinc sulfide family compound. When the discharge system is electrically excited to emit the open-field ultraviolet light, the luminescent material layer 353 is excited to emit visible light. Since the position of the lower air chamber 73 is corresponding to the space _, when the lower air chamber 73Q emits light, the light passes through the intermediate substrate 310 and is emitted outward from the space 39. Therefore, when the electric excitation surface is set to emit 3GG light, the light emitted from the lower air chamber 730 can compensate for the lack of light in the space 390 between the air chambers 710 to provide a relatively uniform light source.

In the preferred embodiment, as shown in Fig. 4, a plurality of lower chamber walls 37 are connected to each other to form a lower chamber wall. The lower chamber wall layer is superposed on the second side 312 of the intermediate substrate 310. In a preferred embodiment, the lower air chamber wall layer is formed on the second surface 312 of the intermediate substrate 3 by sandblasting, etching, mold forming, etc., and forms a plurality of airs together with the middle substrate 31〇. Room 73〇. In this embodiment, however, the plurality of lower plenums 730 still correspond to the locations of the spacers 39, respectively. The upper air chamber 710 and the lower air chamber 730 are preferably airtight spaces. However, in order to facilitate vacuuming and injecting an inert gas, as shown in Fig. 4, the upper air chamber γιο is connected to an air extracting device 770. Further, a gas connection passage 750 is provided between the upper air chamber 710 and the lower air chamber 730. In this embodiment, the gas communication passage 750 is disposed where the upper air chamber 710 and the lower air chamber 730 overlap. When the air extracting device 770 is evacuated, i.e., 12 1342433, the exhausting process of the entire upper air chamber 7i and the lower air chamber 73 is completed via the gas connecting passage 750 and the subsequent inert gas injection degree can be performed. However, in different embodiments, a gas connection passage 750 may be disposed between adjacent upper air chambers 710 or adjacent lower air chambers 730, and each of the upper air chamber 710 or the lower air chamber 730 is independently pumped and inert gas injected. program.

The present invention has been described by the above related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments are not intended to limit the scope of the invention. Rather, modifications and equivalent arrangements are intended to be included within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1B is a cross-sectional view of a conventional planar lamp tube shown in FIG. 1A; FIG. 2 is a schematic view of a conventional flat lamp tube shown in FIG. Explosion diagram of an embodiment component;

Figure 3a is a schematic view of an embodiment of the embodiment of the present invention; Figure 3b is a schematic view of the embodiment of Figure 3a; Figure 4 is a schematic view of the embodiment of Figure 3a; A schematic cross-sectional view of another embodiment of a surface light source device. [Main component symbol description] 110 panel pivot 13 〇 liquid crystal display panel 13 © 1342433 150 upper housing 170 optical diaphragm 180 reflector 190 lower housing 300 electrically excited surface light source device 310 middle substrate 311 first side 312 second side

350 upper chamber wall 351 outer surface 353 luminescent material layer 370 lower air chamber wall 371 outer surface 390 spacer 500 external electrode

710 upper air chamber 730 lower air chamber 750 gas connecting passage 770 exhausting device

Claims (1)

1342433 X. Patent application scope: 1. An electric excitation surface light source device, comprising: a middle substrate having a -first surface and a second surface, wherein the middle substrate has light permeability; a plurality of upper air chamber walls, The plurality of rainbow chambers are difficult to be assigned to the first side of the substrate of the order layer, and each of the upper chamber walls has a convex-outer surface, and the upper surface is chaotic to the wall with light The upper air chamber wall and the towel layer substrate together form an upper air chamber, and a space is formed between the upper air chambers; and a plurality of lower air chamber walls are woven into a plurality of lower air chambers and the sub-ships are connected to the middle substrate. The second surface, each lower chamber wall and the intermediate substrate form a lower chamber; wherein the lower chamber corresponds to the position of the spacer, wherein the shape of the lower chamber corresponds to the shape of the spacer. 2. The electric excitation surface light source device of claim 2, wherein the plurality of upper air chamber walls are formed into an upper air chamber wall layer, and the upper air chamber wall layer is superposed on the middle substrate. The first face is connected to the first face at a position of the spacer. 3. The electric excitation surface light source device of claim 2, wherein the plurality of lower air chambers are formed by a lower air chamber (four), and the lower air chamber wall is difficult to overlap the second of the intermediate substrate surface. 4. If the electric excitation surface light source device described in the application (4) is applied, the lower air chamber wall has light penetrability. 5. The electric excitation surface light source device of claim 1, wherein the lower chamber wall is optically impermeable. 6. If the electric excitation surface light source device described in the above section is applied, the lower chamber wall has a convex-outer surface. The electro-excitation surface light source device of claim 1, wherein the inner wall of one of the upper chamber walls has a layer of luminescent material. 8. The electric excitation surface light source device of claim 1, wherein the inner wall of the lower air chamber has a layer of luminescent material. 9. The electric excitation surface light position as described in item 1 of the middle material, wherein the upper air chamber wall is elongated and distributed side by side on the first surface. 10. The electric excitation surface light source device according to claim 9, wherein the lower air chamber surface is distributed on the second surface ± to form the space between adjacent upper air chamber walls. The location. 11. The electro-excitation surface light source device of claim 2, wherein the upper surface of the upper gas to the wall has a circular arc cross section. 12. If you apply for a patent scope! The electric excitation surface light source device of the present invention, wherein the upper air chamber and the lower air wing have a gas connection channel. 13. The electric excitation surface light source device as described in the scope of claim patent is further 匕3. The p electrode 'where the outer electrode layer covers the end of the outer surface of the plurality of upper chamber walls. 14. The electro-excitation surface light source device of claim 13, wherein the external electrode has a plurality of ends of the outer wall of the gas wall. The backlight module comprises: an electro-excitation surface light source device, comprising: a middle substrate having a first surface and a second surface, wherein the middle substrate has light penetrability; and a plurality of upper chamber walls The plurality of upper chamber walls are respectively connected to the first surface of the middle layer 16 1342433 substrate, and each of the upper chamber walls has a convex-outer surface, and the upper wall is light-transmitting to the wall. Each of the upper air chamber walls and the middle substrate form an upper air chamber, and a space is formed between the upper air chambers; and a plurality of lower air chamber walls are connected to the middle substrate=the second surface Each L wall and the intermediate substrate form a lower gas to, wherein the lower gas chamber corresponds to the position of the spacer, and the shape of the lower gas to the shape corresponds to the shape of the spacer. The backlight module of claim 15, wherein the plurality of upper air chamber walls are a plurality of upper air chamber walls, and the upper air chamber (four) is superposed on the middle substrate - face 'and connect the first side at the off position. 17. The backlight module of claim 15, wherein the plurality of lower chamber walls collectively form a lower chamber fiber layer, the lower chamber wall layer being superposed on the second side of the intermediate substrate . 18. The backlight module of claim 15, wherein the lower chamber wall is light transmissive. 19. The backlight module of claim 15, wherein the lower chamber wall is optically impermeable. The backlight module of claim 15, wherein the lower air chamber wall has an outer surface of the outer convex portion. The backlight module of claim 15, wherein the inner wall of one of the upper chamber walls has a layer of luminescent material. 22. The backlight module of claim 15, wherein an inner wall of the lower chamber wall 17 1342433 has a layer of luminescent material. The backlight module of claim 15, wherein the upper air chamber wall is elongated and distributed side by side on the first surface. The backlight module of claim 23, wherein the lower air chamber wall is elongated, and is arranged side by side on the second surface to form the space between adjacent upper air chamber walls. The location. The backlight module of claim 15, wherein the outer surface of the upper air chamber wall has a circular arc cross section. 26. The backlight module of claim 15, wherein the upper air to the air chamber and the lower air chamber have a gas connection channel. The backlight module of claim 15, further comprising an external electrode, wherein the outer (four) pole covers the outer surface end of the plurality of upper air chamber walls. 28. As claimed in claim 27 In the backlight module, the external electrode covers an outer surface end of one of the plurality of lower air walls. 18