TWI356925B - Light guide panel for lcd comprising stripe prism - Google Patents

Description

1356925 r »

File: TW4226F Nine, invention description: - [Technology of the invention] The invention relates to a light guide plate for liquid crystal display (LCD), in particular, an irregular profile body rib Mirror and staggered light guide plate. [Prior Art]

Since a liquid crystal display (LCD) is not an "emissive device", a liquid crystal display needs to have a backlight module for emitting light. The backlight module is used as a light source for emitting light from a liquid helium display. Then, the liquid 曰曰 阳 子 子 , , , , , , , , 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶 液晶FIG. 1 is a schematic view showing a conventional light guide plate. As shown in Fig. 1, a light source 306 is disposed on the side of a light guide plate 3''. In the light guide plate 3 (10) +, the side portion 3 〇 1 is a region for directly receiving the incident light provided by the illuminating source 306, a front portion 3 〇 3 is a region for diverging light, and a rear portion 3 〇 5 is a region for reflecting light to the front portion 303. A plurality of turns are disposed on the rear portion 305 for reflecting light and reflecting the light to the front portion 303. These turns are also used to refract light and refract light to the front 303. These 稜鏡 include multiple bodies 稜鏡Μ] set in the way of - horizontal strip pattern 320, in addition to more "6 1356925 I \

File: TW4226F phenomenon (Moire phenomenon)). Therefore, the present invention is directed to the irregularity of the cross-bar pattern 510 by the irregularity and correction of the outline of the conventional light guide plate to form an irregular horizontal strip pattern 410 (as shown in Fig. 2). SUMMARY OF THE INVENTION The present invention has been made in view of the above-described disadvantages of the prior art, and in one aspect of the invention, a light guide plate is provided which eliminates an interface between the body 稜鏡 and the staggered prism. • In another aspect of the invention, a light guide plate for a liquid crystal display (LCD) backlight module is provided to provide excellent brightness, uniformity, and visibility to light over the entire surface of the liquid crystal display panel. According to an aspect of the invention, a light guide plate includes a random random strip pattern, each strip pattern having an irregular contour and a width, along with each strip pattern to a distance for receiving the side of the incident light. Increase, the width of each strip pattern increases. The light guide plate further includes an interlaced prism, which is formed outside the random and random strip pattern. The random random strip pattern includes a plurality of bodies 稜鏡 which are arranged perpendicular to the incident direction of one of the rays. In order to make the above description of the present invention more comprehensible, the preferred embodiments will be described in detail below. [Embodiment] Please refer to FIG. 2, which illustrates an embodiment according to the present invention having 8 1356925

File: Schematic diagram of the TW4226F machine's random light bar pattern. The light guide plate 400 according to the embodiment of Fig. 2 of the present invention is used in a liquid crystal display (LCD). The light guide plate includes a side portion 401, a front portion 403, and a rear portion 405. The side portion 401 is for receiving the incident light. The front portion 403 is coupled to the side portion 401 for emitting light out of the light guide plate 400. The rear portion 405 is for reflecting light to the front portion 403. A plurality of random random horizontal strip patterns are formed on the rear portion 4〇5 (in the second figure, although the random random strip pattern on the left and right sides and the random random strip pattern formed in the dot-shaped marked area Similarly, in order to clearly illustrate the random random strip pattern, only the random strip pattern in the central region is indicated by reference numeral 410). A plurality of staggered turns 422 are formed on the rear portion 405, and there is no random random strip pattern 41〇. The random random strip pattern 410 has an irregular contour and a width w, and as the distance from the strip pattern 410 to the side portion 401 increases, the width w of the strip pattern 41〇 increases. Each of the horizontal strip patterns 41 has a plurality of main bodies 412 412 'body 稜鏡 412 arranged perpendicular to one of the incident directions of the light. The body 稜鏡 412 is a group of 具有 having different lengths. Each bar pattern has irregular rims to avoid raying on the boundary plane. The (10) machine random strip pattern 410 is described in terms of a horizontal strip of T' with irregular contours for ease of illustration and description. ▲Although the random random bar pattern 41〇 has irregular wheel friction, the lack of a machine rule of the horizontal bar pattern 41G and other random random horizontal bar pattern training mutual weight f is not good. In a random random strip pattern 4ig between 9 1356925

I I

Fi!e: TW4226F overlaps each other's not only makes the optical properties of the guide wire negative, but also causes a pattern to converge, which will lead to an unfavorable appearance. • Referring to Fig. 3, there is shown a plan view of the rear portion of the light guide plate in accordance with an embodiment of the present invention, the rear portion being divided into a plurality of pattern regions. Further, the 'random random random strip pattern 41' has a restrictive irregular contour in the range of the pattern pitch (pitch pitch) PP as described below and is shown in Fig. 3. Among them, the value is paying attention to, as the original function of the horizontal strip pattern, the random random strip pattern 41〇, is to provide uniform plane light. Therefore, in particular, as in the conventional horizontal strip pattern, the random random strip pattern 410 has a width w, and as the random random strip pattern 4ι〇f illumination source 105 increases in distance, the strip pattern 41〇 The width w is followed by an increase. The staggered turns 422 are formed at the rear portion 405, and a spacer region of the horizontal strip pattern 410 is not formed. In spring, a method of forming a random random strip pattern 410 in a pattern area will be described in detail with the accompanying drawings. 3 to 6 are schematic views showing a random random strip pattern for explaining an embodiment of the present invention. Further, Fig. 7 and Fig. 8 are diagrams showing a random random dot pattern for explaining another embodiment of the present invention. As shown in Fig. 3, there is shown a plan view of the rear portion of the light guide plate in accordance with an embodiment of the present invention, which is divided into a plurality of pattern regions. Various patterns 13^6925

File: The TW4226F area has a preset pattern pitch pp. The rear portion 405 is divided into a plurality of pattern regions 406 (a rectangular shape surrounded by solid lines). Each pattern area 406 has a preset pattern pitch PP. An independent random random strip pattern 410 is formed in a separate pattern area 4〇6. The random random strip pattern 410 is composed of a group of bodies 412 having different lengths. The inner region of the pattern region 406, except for the random random bar pattern 410, is regarded as a spacer region 420 (slashed region). Interlaced 稜鏡 422 (not shown) is disposed on the spacing area 4〇6. The interlaced 稜鏡 422 is formed after the random random strip pattern 41 is completely configured, and the interlaced 422 is omitted in the third drawing. Referring to Figure 4, there is shown a plan view showing a method of β-resonance of a random random reference line for forming a body of a random random strip pattern in accordance with an embodiment of the present invention. In order to form a random random strip pattern 41 (shown in Figure 2), first, a random random reference line RL must be set, which is used as a reference for the interlaced 422 setting. As shown in the figure, 'the preset number of reference points P1, ρ2, ρ3, ρ4, ρ5, Ρ7, Ρ8, ρ9, and Ρ1〇 are set in the pattern area one of the "line CL" (for convenience of description, this The embodiment of the invention is described by (7) reference points. / / After that, according to each reference point Η, P2, P3, p4, p5, p6, Γ, a preset random random rate or lower than preset Machineless way 'set its value scattered random rider random reference line 1356925

' I

FiIe: Above the TW4226F RL and below the random random reference line RL. • Among them, the random random rate mentioned above is the reference point set to the extent that it is far from the random reference line RL. For example, if the maximum random random rate has its value. If it is 10, the random random rate of the reference point is less than or equal to 1〇. For convenience of description, the value of the random random rate of the reference point that is upwardly deviated with respect to the random random reference line RL is denoted by the label +, and the random random rate of the reference point deviating downward from the random random reference line RL The values are denoted by the number -, and the random random rate of each reference point is shown in Table 1 in this embodiment: Table 1 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 + 5 —3 —4 + 2 + 3 + 9 - 7 + 4 -4 -9 It should be particularly noted that Table 1 is taken as an example of the present invention, and each reference point deviates from the random random reference line RL to be in various ways. Define the value of any random random rate. The points scattered by the random random rate on the random random reference line RL are called random points R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10. The random random reference line RL is sequentially drawn through a starting point S to a terminating point E, and is drawn in the middle through random points R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10. The random random reference line RX is shown as being permeable to each random point IU, R2, R3, R4, R5, R6, R7, 12 13,56925

File: The distance set by the TW4226F rule increases as the distance increases. Therefore, a body 稜鏡 412 adjacent to the illuminating source 105 is disposed in a wider manner away from a body 稜鏡 412 of the light source 105 in a narrower manner. Please refer to FIG. 5, which is a plan view showing the main prism of FIG. 4 disposed on a set random random reference line. As shown in Fig. 5, the main body 412 is disposed in such a manner that the center of each of the main body prisms 412 is arranged to conform to the random reference line RL, and the staggered 422 is disposed in the main body 412. On the spacer area 420. In a preferred embodiment, the staggered turns 422 have a column direction that is perpendicular to one of the longitudinal directions of the body bore 412. However, when considering design and process errors, the staggered turns 422 have a column direction that is at an angle to the longitudinal direction of the body 稜鏡 412, which is between 60 degrees (degrees, °) to 90 degrees. ° between. When the body 稜鏡 412 is set in a manner based on the random reference line RL, the random random bar pattern 410, with respect to the interlaced 稜鏡 412, is formed by lines of irregular width. Therefore, it is provided in such a manner as to avoid occlusion of the pattern or the moiré phenomenon caused by the regular body 稜鏡 412 and the staggered prism 422, thereby increasing the cloaking of the pattern. Please refer to FIG. 6 and FIG. 7 at the same time. FIG. 6 is a plan view showing the rear portion of the light guide plate according to another embodiment of the present invention, and a random random dot pattern is formed on the rear portion. Figure 7 shows various random random dot patterns 14 13,56925 f

File: Plan view of an example of TW4226F. Although the above content is formed by the interlacing of the clusters, the appearance of the continuous strip pattern is formed. The manner in which the interlaced prisms are grouped can also be formed in a predetermined area by another repeating dot pattern as shown in Figs. 6 and 7.

As shown in Fig. 2, as shown in Fig. 2, as the distance from the strip pattern 410 to the illumination source 1〇5 increases, the width w of the strip pattern 41〇 increases. In other words, regarding the dot pattern gamma, the further the distance between the dot pattern 430 and the illumination source 1〇5, the larger and the greater the number of dot patterns 430 are set to control the total amount of light. The dot pattern 430 according to an embodiment of the present invention is formed by forming a machine reference line RL (shown in FIG. 2), and then configuring the body 稜鏡 412 according to a random reference line. In the embodiment of the dot pattern 43A, the arrangement of the main tooth mirror 412 is in accordance with the setting pattern of the random random strip pattern " (shown in Fig. 2). ,... As shown in Figure 7, a random random dot pattern: one of the appearances. The four types of appearance include: (1) = the next two (1) the rhombic (diamond) appearance; (c) the rectangular (two,

And (d) a combination of the above three. In addition, please refer to FIG. 8 and FIG. 9 at the same time, and the partial cross-body 412 of the light guide plate for the backlight module of the liquid crystal display is different from the staggered 稜鏡 422 system. 15 1356925

I I

File: TW4226F degree, this structure is proposed due to the convenience of manufacturing. Thus, as shown in Fig. 8, the staggered turns 422 are formed at a lower height than the main body 412. Alternatively, as shown in Fig. 9, the staggered turns 422 are formed at a higher height than the main body prisms 412. Next, the present invention will provide several experimental examples for supporting a light guide plate according to an embodiment of the present invention. When used in a backlight module of a liquid crystal display, the light guide plate can increase the brightness, uniformity, and visibility of light. It is to be understood that in the technical field of the present invention, those skilled in the art can easily understand the contents of the appeal and will be omitted. Hereinafter, experimental examples for demonstrating advantages of the embodiments of the present invention will be described later. <Experimental Example 1> The size of the horizontal strip pattern according to the embodiment of the present invention. The random random strip pattern has a pattern pitch of 430# m and a maximum random random rate of 0.5% (here, the maximum random random rate is 0.5%, and the value is 0.5% of the * width of the interval area. The random random rate indicating "%" below means that the value is related to the width of the spacer region) formed at the rear of the wedge-shaped light guide plate. The parameters of the light guide plate are 288.8 mm (millimeter, mm) x 217.7 mm x 2.4 mm (starting end) x 0.8 mm (end end), which is width (W) x length (L) x thickness (T). The body prism has a height with a value of 14.9 m. The body 稜鏡 has a pitch with a value of 25 /zm. The body prism has an apex angle with a value of 82.5°. The main body is formed in each horizontal strip pattern. The upper surface of the light guide plate is a reflective surface. 16 1356925

t I

File:TW4226F In addition, the interlaced 稜鏡 has a pitch of 25//m. Interlaced Edge - The mirror has a height with a value of 9.6/m. The staggered turns have an apex angle with a value of 105°. The staggered tether is formed on the rear of the light guide plate, in the area where there is no main body defect. Interlace the prism and be perpendicular to the body 稜鏡. The upper surface of the light guide plate is a reflective surface. &lt;Experimental Example 2 to Experimental Example 8&gt; Experimental Example 2 to Experimental Example 8 except that the random horizontal bar pattern has one of the most large random random rate ratios corresponding to 1.5%, 2.5%, 3.5%, 5%, and 15 respectively. The remaining conditions were the same as in Experimental Example 1 except for %, 30%, and 50%. The maximum random random rate of these experimental examples is shown in Table 2: Table 2 Serial number 1 2 3 4 5 6 7 8 Maximum random random rate 0.5% 1.5% 2.5% 3.5% 5% 15% 30% 50 % According to the experimental conditions of the experimental examples, the brightness, uniformity and visibility of the light are measured as shown in Table 3: Table 3 Experimental Example No. 1 2 3 4 Brightness 2200 to 2200 to 2200 to 2200 to (candle light /m X meters, 2500 2500 2300 2500 1356925 I f

File:TW4226F cd/m2) Uniformity (%) 55 to 60 55 to 60 55 to 60 55 to 60 Appearance Severely superimposed and finely folded Excellent Table 3 Continued Experimental Example No. 5 6 7 8 Brightness (cloudiness / 2200 to 2200 to 1800 to 1200 to meters X meters, cd/m2) 2500 2500 1850 1300 Uniformity (%) 55 to 60 55 to 60 45 to 50 45 to 50 Not seriously serious Serious appearance Excellent dark Dark picture Dark figure pattern The experimental examples 1 to 6 showed similar optical characteristics in the brightness and uniformity of light. Experimental Example 1 and Experimental Example 2 produced an occlusion pattern between the main body 交 and the 交 产生 to produce an unfavorable appearance. Experimental Example 7 and Experimental Example 8 exhibited low luminance due to a decrease in the value of the vertical component of luminance. The decrease in the value of the vertical component of the luminance is related to an increase in the random random rate resulting in a change in the optical path. Experimental Example 6 produced a dark pattern due to the difference between the left and right sides of the horizontal strip pattern. The pattern of the horizontal strip has excellent optical characteristics and low moiré. When the random random rate increases, the dark pattern becomes more severe. In other words, the optical characteristics of the best results in the experimental examples 3 to _ 5 series 1356925

File: TW4226F and shows no uniform plane light. According to the results disclosed above, the maximum random random rate is preferably set between 15 〇 / 〇 and 15% of the interval area. Preferably, the maximum random random rate is set between 2% and 10% of the interval area. Referring to FIG. 10, a cross-sectional enlarged view of a top corner of a main body of a light guide plate for a backlight module of a liquid crystal display according to an embodiment of the present invention is shown. Starting from the left side of Figure 10, the angle of the apex angle of the main body is 80. 90. 1〇〇. 11〇. 12〇. 13〇. And 140. The main body has a pitch of 25 // m. Referring to FIG. 11 , an enlarged view of a wearing surface of a main body of a light guide plate for a backlight module of a liquid crystal display device according to an embodiment of the present invention is shown. The subject 左侧 on the left side of Figure 11 does not have any radius of curvature. The subject in the middle of the figure 相 has a positive radius of curvature in addition to the body prism on the left side, and the subject on the right side of Figure 11 is excluded. The subject 左侧I on the left side has a negative curvature radius. In the following, several experimental examples are presented to demonstrate the effects of the structure according to an embodiment of the present invention. &lt;Experimental Example 9-1 &gt; In Test Example 9-1, the strip pattern was formed on the back surface of the light guide plate of the model. The pattern pitch of the pattern of the buy pattern was 430 /z m. The number of light guide plates is 288.8 mm X 217.7 mm X 2.4 mm (starting end) X 〇 8 mm (end end)' is the width (W) x length (L) x thickness (τ). Lord 1356925

t I

File: TW4226F Body 形成 is formed on each horizontal strip pattern. The body 稜鏡 has a height with a value of 14.25 ym. The body prism has a pitch of 25 #m. The body prism has an apex angle with a value of 82.5°. In addition, the interlace has a pitch of 25/im. The staggered enthalpy has a height with a value of 10.49 // m. The staggered prism has an apex angle with a value of *100°. The staggered tether is formed at the rear of the light guide plate without the region of the main prism. Interlaced and perpendicular to the main body. The upper surface of the light guide plate is a reflective surface. • &lt;Experimental Example 9-2 to Experimental Example 9-8&gt; Experimental Example 9-2 to Experimental Example 9-8, except for the apex angle of the staggered 稜鏡, the value was increased by a correction factor by 10 steps per 10° from 110 From ° to 170 °, the remaining conditions were the same as in Experimental Example 9-1. The correction factors for these experimental examples are shown in Table 4: Table 4 Experimental Example No. 9-1 9-2 9-3 9-4 Interlaced angle (degree, 〇) 100 110 120 130 Prism height (micrometer, # m) 10.49 8.75 7.22 5.83 Table 4 continued 20 1356925 *

FiIe: TW4226F Experimental Example No. 9-5 9-6 9-7 9-8 Interlaced angle (degree, °) 140 150 160 170 Prism south (micrometer, β m) 4.55 3.35 2.2 1.04 <Experimental Control 1&gt In Experimental Comparative Example 1, the horizontal strip pattern was formed at the rear of the wedge-shaped light guide plate, and the pattern of the horizontal strip pattern was 430# m. The parameters of the light guide plate are 288.8 mm X 217.7 mm X 2.4 mm (starting end) X 0.8 mm (end end), which is width (W) x length (L) x thickness (T). The main body has a height with a value of 14.25/i m. The main body has a pitch of 25/zm. The main body has an apex angle with a value of 82.5°. A body prism is formed in each of the strip patterns. In addition, the staggered shuttle has a pitch of 25/zm. The staggered 稜鏡 has a height with a value of 9.6 /i m. <Experimental Example 1 (M&gt; In Experimental Example 10-1, the horizontal strip pattern was formed on the rear portion of the wedge-shaped light guide plate, and the pattern spacing of the horizontal strip pattern was 430 # m. The parameter of the light guide plate was 288.8 mm. X 217.7mm X 2.4mm (starting end) X 0.8 mm (end end)' is the width (W) x length (L) x thickness (T). The main body is formed on each strip pattern. Has a height, 21 1356925 * »

File:TW4226F has a value of 14.25em. The main body has a pitch with a value of 25/m. The main body has an apex angle with a value of 82 5 . . Here, the prism has a radius of curvature of (+) 0.1R on each side of the crucible (curvature • radius is a centimeter scale condition). In addition, the staggered prism has a pitch of 25 "m. The staggered prism has a height" whose value is 8 or #m. The staggered 稜鏡 has a vertex angle and its value is 11 〇. The mirror system is formed on the rear portion of the light guide plate without the area of the strip pattern. The staggered prism is perpendicular to the main body 。. The front portion of the light guide plate is a reflective surface. <Experimental Example 10-2 to Experimental Example 10 8) Experimental Example 10-2 to Experimental Example 10_8, except for the R value, the other conditions were the same as those of Experimental Example 10-1. The R system was the radius of curvature of each side of the crucible. Experimental Example 10-2 to Experimental Example 10_8 The r system is from (1 to (^) 0.4 to (-) 0.4. The R values of these experimental examples are shown in Table 5:

Table 5 Experimental Example No. 10-1 10-2 10-3 10-4 Curvature radius (body prism, mm) (+) 0.1 (+) 0.2 (+ ) 0.3 (+ ) 0.4 Table 5 continued Example No. 10-5 10-6 10-7 10-8 Curvature radius (_)0.4 (-)0.3 (-)0.2 (-)0.1 22 1356925 * &gt;

File: TW4226F (subject prism, mm) . &lt;Experimental Comparative Example 2&gt; In Experimental Comparative Example 2, the horizontal strip pattern was formed at the rear of the wedge-shaped light guide plate, and the pattern pitch of the horizontal strip pattern was 430// m. The parameters of the light guide plate are 288.8 mm X 217.7 mm X 2.4 mm (starting end) X 0.8 mm (end end), which is width (W) x length (L) x thickness (T). The main body has a height with a value of 14.25# m. The body prism has a pitch of 25/zm. The main body has an apex angle with a value of 82.5°. The main tether is formed in each strip pattern. In addition, the staggered prism has a pitch of 25# m. The staggered enthalpy has a height with a value of 8.75/zm. The staggered prism has an apex angle with a value of 110°. The staggered tethers are formed in the back, where there is no horizontal strip pattern. Interlaced and perpendicular to the main body. The upper surface of the light guide plate is a reflective surface. Table 6 Experimental example number 9-1 9-2 9-3 9-4 Interlaced angle (degree, °) 100 110 120 130 Brightness (cd) 257.47 275.74 255.62 265.92 23 1356925

• I

File: TW4226F Experimental Example No. 9-5 9-6 9-7 9-8 Experimental Comparative Example 1 Angle of Interlaced Prism (degree, °) 140 150 160 170 Brightness (cd) 269.98 258.01 242.52 230.92 217.59 Table 6 is an experimental example The results of the luminance measurement of 9_i to Experimental Example 9_8 and Experimental Comparative Example 1. As is apparent from Table 6, the experimental example of the present invention exhibited a higher central luminance than the experimental comparative example. Further preferably, in Experimental Example 9-1 to Experimental Example 9-6, when the interlaced enthalpy has an angle of from 1 Torr to 160, the film has more excellent brightness than the other experimental examples. Experimental example number ___ Table 7 10-1 10-2 10-3 10-4 Curvature radius (body prism, mm) ~~—, (+)0.1 (+)0.2 ( + )0.3 ( + )0.4 Brightness (cd ) ^202^2 287.97 313.45 301.48 Experimental example number 10-5 10-6 10-7 10-8 Experiment pair 24 1356925

File:TW4226F As usual 2 Curvature radius (body prism, mm) (-) 0.4 (-) 0.3 , (-) 0.2 (-) 0.1 Brightness (cd) 215.88 198.21 160.03 137.34 275.74

Table 7 shows the results of the test of the test results of the test group 1 〇-1 to the experimental example i 〇 _8 and the experimental control 2 control group. As can be seen from Table 7, the experimental example 1 ο·] has the most favorable shell degree, and the result of the luminance measurement is compared with the experimental comparative example 2, and the luminance system is fast from the experimental example 10-3 to the experimental example 1〇-1. The ground is decremented, and = Experimental Example 10-5 is rapidly decremented to Experimental Examples 10-8. In general, in each of the above experimental examples of the present invention, when each side of the main prism has a radius of curvature of a (+) value, the system has a higher central luminance than that of Experimental Comparative Example 2. Further, when the texture of the radius of curvature was the same as the values of Experimental Example 10-2 to Experimental Example 10-4, it was more excellent in brightness than the control group 2 of Experimental Example 2. ^About the relationship between the radius of curvature of the main prism and its pitch. It is known from the above that when the main prism has a vortex shape or an inverted vortex shape, the ratio of the value of the radius of curvature to the value of the pitch is 1:1 to 丨:3〇. When the light guide plate of the above description is used for a liquid crystal display, the backlight module can achieve a similar effect by the backlight structure of the liquid crystal display of the conventional prismatic prism. In detail, when it comes to the light guide of the invention, it is possible to reduce the optical cymbals that must be used for one or two conventional backlight modules. 25 1356925 • l

File: TW4226F • Referring to Fig. 12, there is shown a schematic view of a light guide plate having a front side according to another embodiment of the present invention. In the example of Fig. 12, the front side 稜鏡 440 is formed on one of the front portions 403 of a light guide plate 400. Each of the front sills 440 has a preset wear profile. The front prism 440 is used to cause light to be diffracted, refracted, and scattered when the light exits the light guide plate 400. Similar to the example illustrated in Fig. 2, the rear portion 405 of the light guide plate 400 is formed by a random random strip pattern 410 and a staggered pattern 422. Among them, the front prism 440 is formed on the entire surface of the front portion 403, and the front side 440 is not spaced apart from each other in the middle of the twelfth. The front side 稜鏡 440 is arranged in such a manner as to have a column direction, and the column direction corresponds to the direction in which the light source 105 emits light. Although one of the front prisms 440 has a vertical cross section, it is shown in Fig. 12 in a shape having a three-sided shape. However, the front 稜鏡 440 series has a variety of different cross-section shapes. In addition, when the front prism 440 has a three-sided type, the front side has an apex angle, preferably between 70 and 100. . Referring to Figures 13 through 15, there are shown schematic views of various examples of front side turns having different cross-sectional shapes. As shown in Fig. 13, the front 稜鏡 440 series can be arranged in such a manner as to have a space between them. The front prism 440 is disposed in a manner of &quot;fixed pitch d, rather than being closely connected, and the structure having a fixed pitch d can be increased 26 1356925

* I

Fiie: TW4226F reduces the brightness of light. Conversely, when this ratio is higher than 0.6, a level of viewing angle is excessively reduced, resulting in poor optical characteristics. According to the light guide plate of the present invention, the rear portion of the light guide plate includes an interlaced prism and a body 稜鏡, and the irregular contour of the body , is formed to form a horizontal strip pattern or a dot pattern, thereby improving the body 稜鏡 and the staggered prism. Boundary pattern or crease on the boundary plane. In addition, according to the light guide plate proposed by the present invention, the light guide plate is used in the liquid crystal display device, and when the light path is increased in the vertical direction, the light reaches the liquid crystal panel to have a uniform increase amount, compared with the conventional light guide plate. This improves the brightness, uniformity, and visibility of the light. In the above, the present invention has been disclosed in the above preferred embodiments, but it is not intended to limit the present invention. Those skilled in the art can make various changes and modifications 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. 28 13,56925 »

File: TW4226F [Simple description of the drawing] ' Figure 1 shows a schematic diagram of a conventional light guide plate. - Figure 2 is a schematic illustration of a light guide plate having a random random - strip pattern in accordance with one embodiment of the present invention. Fig. 3 is a plan view showing the rear portion of the light guide plate in accordance with an embodiment of the present invention. The rear portion is divided into a plurality of pattern regions. Figure 4 is a plan view showing a method of setting a random random reference line for forming a body of a random random strip pattern in accordance with an embodiment of the present invention. Fig. 5 is a plan view showing the main body 第 in Fig. 4 placed on a set random random reference line. Figure 6 is a plan view showing the rear portion of the light guide plate according to another embodiment of the present invention, and a random random dot pattern is formed on the rear portion. Figure 7 is a plan view showing an example of various random random dot patterns. φ FIGS. 8 and 9 are respectively partial cross-sectional views of a light guide plate for a backlight module of a liquid crystal display according to an embodiment of the present invention. Figure 10 is a magnified view of the top surface of the main body of the light guide plate of the backlight module of the liquid crystal display according to an embodiment of the present invention. 11 is a cross-sectional enlarged view of a main body of a light guide plate of a backlight module for a liquid crystal display according to an embodiment of the present invention. Figure 12 is a schematic view of a light guide plate having a front side according to another embodiment of the present invention. Figures 13 to 15 show different types of cross sections 29 1356925 « «

File: TW4226F Schematic of various examples of front prisms. [Main component symbol description] 105, 306: illumination source 300, 400: light guide plate 301, 401: side portions 303, 403 of the light guide plate: front portion 305, 405 of the light guide plate: rear portion of the light guide plate • 320, 410: horizontal Bar pattern 322, 412: body 稜鏡 340, 422: staggered 稜鏡 406: pattern area 420: space area 430: dot pattern 440: front side : A: top о E: end point S: starting point CL: center Line PP · · Pattern pitch RL : Random random reference line PI, P2, P3, P4, P5, P6, P7, P8, P9, P10: Reference point

Rl, R2, R3, R4, R5, R6, R7, R8, R9, R10: with 30 1356925 • %

File:TW4226F Machine Point • d : Fixed Spacing - h2 : rfj Degree ‘ w, w2 : Width

31

Claims (1)

1356925 X. Patent application scope: 1. A light guide plate 'for liquid crystal display (LCD) 'The light guide plate includes a side portion for receiving incident light' s. The light guide plate includes a crotch portion connected to The side portion is configured to emit light to the outside of the light guide plate, and the light guide plate includes a rear portion for reflecting light; wherein the rear part of the skeleton is composed of a plurality of randomly random horizontal strip patterns, and is formed on the horizontal lines. a plurality of interlaced ridges other than the strip pattern, each of the ♦ strip patterns having an irregular contour and a width, and each distance to the side portion increases with each of the strip patterns The width of the strip pattern is increased, and each of the strip patterns further includes a plurality of body prisms disposed in a direction perpendicular to one of the incident directions of the light. 2. The light guide plate according to claim 2, wherein the longitudinal direction of the staggered turns and the longitudinal direction of the main bodies are defined by an angle of 7 degrees ( Degrees, .) to ιι〇. . The light guide plate of claim 1, wherein the longitudinal direction of the staggered prisms and the longitudinal direction of the main volumetric mirrors define an angle 'the angle is 90. . 4. For the light guide plate mentioned in item 1 of the application village, the (percent, %) to 15%. 5. The method of claim 1, wherein the body of one of the spacers has a width of 1.5, and the body of the one of the spacers is disposed on the light guide plate of each of the items. Among the two-card random pattern, the main body 稜鏡32 1356925 « » Fiie: TW4226F One of the maximum random random values is 2% to 10% of the width of one of the spacing areas. And 〇6. - a light guide plate for a liquid crystal display $ (-deg_di_y, LCD), the lining plate includes a side portion, receives the incident light with g 'the light guide plate includes - the front portion is connected to the side a portion for emitting light outside the light guide plate, and the light guide plate includes a rear portion for reflecting light; wherein the rear portion is formed by a plurality of dot patterns, the plurality of dots being composed of a plurality of bodies The prisms are constructed in a clustering manner, the body prisms being disposed perpendicular to the incident direction of the light, and each of the dot patterns having an irregular contour. 7. The guide as described in claim 6 wherein the cough portion is further formed by a plurality of staggered ridges formed on an area of the rear portion having no such dot pattern. ▲ 8. The light guide plate according to item 7 of the scope of the invention, wherein the longitudinal direction of the staggered turns and the longitudinal direction of the main bodies define an angle, the central angle is between 6 Degrees (.degrees) to.丄9. The light guide plate according to claim 7, wherein the parent error and the cross-section of the main body include: a two-sided four-sided type, and a preset on each side The curvature is half (four), a thirsty shape or an inverted vortex shape, and a group of the above-mentioned appearances. (4) The light guide plate according to item 7 of the patent application scope: wherein the material is erroneously-shaped, the cross-section has a three-sided outer shape, and the three-sided outer shape and the apex angle are 100 to 16 years old. . </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; The apex angle is between 70. To 1 〇〇. . 12. The light guide plate of claim 7, wherein the cross section of the main body has a predetermined radius of curvature - a vortex or a thirst. The light guide plate of claim 12, wherein the wearing surface of the main body has the vortex or the reverse vortex shape, and the value of the predetermined radius of curvature is the same as the vortex or The anti-vortex shape-to-pitch ratio is between 1:1 and 1:3〇. Μ. For example, the item 帛i item or the 6th light guide plate, where the front part. It is formed by a plurality of frontal flaws, which have a preset surface. 15. The light guide plate of claim 14, wherein the front side turns have a longitudinal direction that is perpendicular to the main body: a longitudinal direction. 16. The light guide plate of claim 14, wherein the front side has a cross-sectional shape including a three-sided outer shape, a four-sided shape, and a predetermined curvature on each side. The illuminating plate of the ninth aspect of the invention, wherein the front lanthanum is disposed in such a manner as to have a predetermined interval between each other. Port 18. The light guide plate of claim 17 wherein the 34 1356925 * * File: TW4226F has an area ratio of one of the front faces to the predetermined interval plane from 1:0.5 to ' 1:10 . The light guide plate of claim 15, wherein the ratio of the height to the width of one of the front prisms is between 0.3 and 0.6. 20. A backlight module for a liquid crystal display (LCD), the backlight module comprising: the light guide plate of claim 1; and a light source disposed on one side of the light guide plate . Lu 21. A liquid crystal display (LCD) comprising: a light guide plate according to item 1 of the claim; and a light source disposed on one side of the light guide plate. 35