JP4328799B2 - Backlight module - Google Patents

Description

The present invention relates to a backlight module, and more particularly to a module in which a plurality of light condensing elements are installed on a light exit surface of a light guide plate and a micro light guide is installed on an optical thin film.

  A light source output from a known backlight module converts a linear light source into a planar light source, and the entire light source is subjected to the action of a prism column of a prism to form a regular linear light beam. The thin film transistor (TFT) and color filter (CF) in the liquid crystal panel have an extremely fine matrix arrangement. Therefore, the linear light beam having regularity once regains the gap between the thin film transistor and the elements in the color filter. When it passes, the passed light beam generates diffraction and forms an interference pattern on the liquid crystal panel, and finally destroys the function at the time of displaying the liquid crystal panel.

  Since it is not possible to know whether or not the interference pattern formation phenomenon occurred at the completion of assembly in a general backlight module factory, it can be finally understood when the liquid crystal panel display is started up after assembly in the liquid crystal panel factory. Therefore, it is a problem that is desired to be overcome by both the backlight module factory and the liquid crystal panel factory.

A backlight module that solves the above-described problems is provided.

  The backlight module of the present invention includes at least a light guide plate, a reflecting piece, an optical thin film, and a lamp, and the light guide plate has at least one light incident surface, a reflective surface, and a light exit surface, and a light exit surface. Alternatively, a plurality of condensing elements are installed on the reflecting surface, and each longitudinal section of the condensing elements is triangular, and a plurality of rod-shaped micro light guides are installed on one surface of the optical thin film, The micro light guide has two or more top peaks, and the tops of the micro light guides are different in height, and one of the high peaks or the low peaks is a left-right continuous curve, or The altitude is the design of continuous ups and downs, so that all the light beams are not regular linear shapes, but output continuously curved light beams, and after passing through the thin film transistors and color filters in the liquid crystal panel , Interference pattern when displaying To prevent the phenomenon, to improve the brightness of the entire output light source.

  According to the present invention, the phenomenon of interference pattern formation at the time of display after the luminous flux passes through the thin film transistor and the color filter in the liquid crystal panel is improved, and the luminance of the entire output light source is improved.

As shown in FIGS. 1 and 2, the backlight module A of the present invention includes at least a light guide plate 5, a reflection piece 6, an optical thin film 7, an upper diffusion film 8, and a lamp L.

  The light guide plate 5 has at least a light incident surface 51, a reflective surface 52, and a light outgoing surface 53. The light outgoing surface 53 has a plurality of light collecting elements 531, and the basic form of the light collecting elements 531 is a two-arc line. It is a geometric shape formed by crossing, and each longitudinal section of the light collecting element 531 is a triangle, and protrudes from one surface of the light guide plate 5 or is recessed (in the drawing, protrudes from the light exit surface 53 of the light guide plate 5). The long axis of the light condensing element 531 is in the lamp L direction, and the light guide plate 5 of the present invention is a triangle in which the light condensing elements 531 are spaced apart as shown in FIG. It is columnar and protrudes or is recessed from the light exit surface 53 of the light guide plate 5.

  The reflection piece 6 is installed outside the reflection surface 52 of the light guide plate 5, and the light source exposed from the light guide plate 5 reflects and returns to the light guide plate 5.

The optical thin film 7 is made of a preferable transmissive material, and a plurality of rod-shaped micro light guides 71 are provided on the surface thereof. The micro light guide 71 is the same material as the main body of the optical thin film 7 or the main body of the optical thin film 7. And a different material. Each micro light guide 71 has two or two or more peak peaks 711, and the peak peaks 711 of the micro light guide body 71 form a low peak 711a and a high peak 711b with different levels. The present invention takes two peaks as an example). The optical thin film 7 is installed outside the light exit surface 53 of the light guide 5 described above, and when implemented, the optical thin film 7 has the surface of the micro light guide 71 facing the light exit surface 53 of the light guide plate 5. The light guide 71 is arranged in a non-parallel manner in the direction in which the light condensing elements 531 of the light guide plate 5 are formed.

  The upper diffusion thin film 8 is disposed above the optical thin film 7 and has an action of protecting the entire backlight module A.

  The lamp L is a cold-cathode tube or a light emitting diode. When the lamp L is implemented by a light emitting diode, the long axis of the condensing element 531 on the light guide plate 5 is in the lamp L direction, as shown in FIGS. As shown, the condensing element 531 is installed so as to become denser as it is farther from the lamp L.

  At the time of implementation, as shown in FIG. 2, when the light flux of the lamp L enters from the light incident surface 51 of the light guide plate 5, the light condensing element 531 on the light exit surface 53 of the light guide plate 5 condenses the light guide plate 5. The luminous flux that passes through the element does not have excessive coincidence, and after passing through the optical thin film 7, the luminous flux is output in a continuous curved shape instead of a regular straight line. Without improving the brightness of the entire output light source.

When the optical thin film 7 of the present invention is implemented, the height of the peak 711 of each micro light guide 71 is different from each other, forming a low peak 711a and a high peak 711b, and as shown in FIGS. One of the low peaks 711a or the high peaks 711b of the light body 71 has a left and right continuous curved form, and thus when the light source passes through the optical thin film 7, the left and right continuous curves of the low peaks 711a (or the high peaks 711b). Therefore, the light beams collected through the micro light guide 71 are not simple straight lines, each light beam has a change in curvature, the light source is not excessively ordered, the light source is a thin film transistor in the liquid crystal panel, and When passing through the color filter, no interference pattern is generated on the LCD panel display.

As shown in FIGS. 10 to 13, when the present invention is carried out, one of the low peaks 711 a or the high peaks 711 b of each micro light guide 71 exhibits a vertical undulation in the altitude. When passing through the optical thin film 7, the ridges 711a (or high peaks 711b) are continuously undulating, and similarly, the luminous flux is not a simple straight line, but the light source passes through the thin film transistors and color filters in the liquid crystal panel. No interference pattern is generated during LCD panel display.

  As shown in FIGS. 14 to 17, at the time of implementing the present invention, one of the low peaks 711 a or the high peaks 711 b of each micro light guide 71 simultaneously exhibits a left and right continuous curve, and the altitude is up and down. As shown in FIG. 18 and FIG. 19, the two of the low peak 711a or the high peak 711b of each micro light guide 71 exhibit a left-right continuous curve and the height is continuous vertically. As a result, when the light source passes through the optical thin film 7, the low peak 711 a (or the high peak 711 b) is continuously curved left and right, and the altitude is similarly concentrated by the vertical undulation. Is not a simple straight line, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, no interference pattern is generated when the liquid crystal panel is displayed.

  As shown in FIGS. 20 and 21, when the present invention is implemented, one surface 91 of the optical thin film 9 forms a plurality of rod-shaped micro light guides 92, and each micro light guide 92 has two, Alternatively, there are two or more peak peaks 921, and the peak peaks 921 of each micro light guide 92 have a high degree of homology, and the shape of all peak peaks 921 or some peak peaks 921 has a change. (In this embodiment, three peak peaks are taken as an example), the peak peak 9211 at the center of the micro light guide 92 has a left and right continuous curve design, and the peak peaks 9212 and 9213 on the two sides are linear designs. Thus, when the light source passes through the optical thin film 9, the peak 9211 at the center of the micro light guide 92 is left and right continuously curved, and the light flux is not a simple straight line, but the light source passes through the thin film transistor and the color filter in the liquid crystal panel. LCD panel display Does not generate interference pattern when spraying.

  As shown in FIG. 22 and FIG. 23, when the present invention is implemented, all the top peaks 9211, 9212, 9213 of the micro light guides 92 of the optical thin film 9 all have a laterally curved shape, The applied light flux has a change, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, no interference pattern is generated during the liquid crystal panel display.

  As shown in FIGS. 24 and 25, when the optical thin film 9 is implemented, the top peaks 9212 and 9213 on the two sides of each micro light guide 92 are in the form of a left and right continuous curve, and the top peak 9211 located in the center is Similarly, the applied light flux has a change, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, no interference pattern is generated when the liquid crystal panel is displayed.

  As shown in FIG. 26 and FIG. 27, when the optical thin film 9 of the present invention is implemented, the heights of the top peaks 9211, 9212, 9213 of each micro light guide 92 are all in the form of up and down continuous undulations. When the light source passes through the optical thin film 9, the luminous flux changes due to the top and bottom ridges of the top peaks 9211, 9212, 9213, and when the light source passes through the thin film transistors and color filters in the liquid crystal panel, the liquid crystal Does not generate an interference pattern during panel display.

  As shown in FIG. 28 and FIG. 29, when the optical thin film 9 of the present invention is implemented, the heights of the top peaks 9212 and 9213 on the two sides of each micro light guide 92 are in the form of up and down continuous undulations. The height of the peak 9211 located is uniform, so that when the light source passes through the optical thin film 9, the luminous flux after the action of the micro light guide 92 is variable, the light source is a thin film transistor in the liquid crystal panel, and When passing through the color filter, no interference pattern is generated on the LCD panel display.

As shown in FIGS. 30 and 31, when the optical thin film 9 of the present invention is implemented, the height of the top peak 9211 of each micro light guide 92 takes the form of up and down continuous undulations, and the top peaks 9212 and 9213 on the two sides. The altitude is uniform,
When the altitude of the peak 9211 is continuous ups and downs, the luminous flux after the action of the micro light guide 92 has a change, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, Does not generate interference pattern.

  As shown in FIG. 32 and FIG. 33, when the optical thin film 9 of the present invention is implemented, the top peaks 9211, 9212, 9213 of each micro light guide 92 simultaneously exhibit a left-right continuous curve, and the altitude is high. It has a form of continuous ups and downs, so that the luminous flux after the action of the micro light guide 92 has changed, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, the interference pattern at the time of the liquid crystal panel display Is not generated.

  As shown in FIG. 34 and FIG. 35, when the optical thin film 9 of the present invention is implemented, the top peak 9211 of each micro light guide 92 simultaneously exhibits a left-right continuous curve, and the altitude is a vertical undulation. The two top peaks 9212 and 9213 have a linear shape, whereby the light flux after the action of the micro light guide 92 has a change, and the light source passes through the thin film transistor and the color filter in the liquid crystal panel. When doing so, no interference pattern is generated at the time of LCD panel display.

As shown in FIG. 36 and FIG. 37, when the optical thin film 9 of the present invention is implemented, the top peak 9211 of each micro light guide 92 is in a linear form, and the top peaks 9212 and 9213 on the two sides are simultaneously It exhibits a left and right continuous curve, and the altitude exhibits a form of up and down continuous undulation, whereby the light beam after the action of the micro light guide 32 has a change, and the light source includes a thin film transistor and a color filter in the liquid crystal panel. When passing, no interference pattern is generated when LCD panel display.

In the present invention, a condensing element 531 protruding or recessed from the light output surface 53 of the light guide plate 5 is installed on the light output surface 53 of the light guide plate 5, and the optical thin film 7 of the micro light guide 71 is installed together. Thus, the light flux passing through the light condensing element 531 of the light guide plate 5 does not have excessive coincidence, and when the light source passes through the thin film transistor and the color filter in the liquid crystal panel, an interference pattern is generated at the time of the liquid crystal panel display. do not do.

At the time of carrying out the present invention, by installing a condensing element on the reflecting surface 52 of the light guide plate 5 and using the above-described optical thin film together, similarly, the light flux passing through the light condensing element of the light guide plate 5 is excessive. When the light source passes through the thin film transistor and the color filter in the liquid crystal panel, the interference pattern is not generated during the liquid crystal panel display.

It is a three-dimensional exploded view of the backlight module of the present invention. It is a side view of the backlight module of the present invention. It is a three-dimensional exploded view of another embodiment of the light guide plate of the backlight module of the present invention. It is a distribution map of the condensing element on the light-guide plate of this invention. It is a distribution map of the condensing element on the light-guide plate of this invention. It is a three-dimensional view of the first embodiment of the optical thin film of the present invention. FIG. 7 is a top view and a side view of FIG. 6. It is a three-dimensional view of the second embodiment of the optical thin film of the present invention. FIG. 9 is a top view and a side view of FIG. 8. It is a three-dimensional figure of the 3rd Example of the optical thin film of this invention. It is the top view of FIG. 10, and a side view. It is a three-dimensional figure of 4th Example of the optical thin film of this invention. FIG. 13 is a top view and a side view of FIG. 12. It is a three-dimensional view of the fifth embodiment of the optical thin film of the present invention. FIG. 15 is a top view and a side view of FIG. 14. It is a three-dimensional view of the sixth embodiment of the optical thin film of the present invention. FIG. 17 is a top view and a side view of FIG. 16. It is a three-dimensional view of the seventh embodiment of the optical thin film of the present invention. FIG. 19 is a top view and a side view of FIG. 18. It is a three-dimensional view of the eighth embodiment of the optical thin film of the present invention. FIG. 21 is a top view and a side view of FIG. 20. It is a three-dimensional view of the ninth embodiment of the optical thin film of the present invention. It is the top view of FIG. 22, and a side view. It is a three-dimensional view of the tenth embodiment of the optical thin film of the present invention. FIG. 25 is a top view and a side view of FIG. 24. It is a three-dimensional figure of 11th Example of the optical thin film of this invention. FIG. 27 is a top view and a side view of FIG. 26. It is a three-dimensional figure of 12th Example of the optical thin film of this invention. FIG. 29 is a top view and a side view of FIG. 28. It is a three-dimensional figure of 13th Example of the optical thin film of this invention. FIG. 31 is a top view and a side view of FIG. 30. It is a three-dimensional figure of 14th Example of the optical thin film of this invention. FIG. 33 is a top view and a side view of FIG. 32. It is a three-dimensional figure of 15th Example of the optical thin film of this invention. FIG. 35 is a top view and a side view of FIG. 34. It is a three-dimensional view of the sixteenth embodiment of the optical thin film of the present invention. FIG. 37 is a top view and a side view of FIG. 36.

Explanation of symbols

A backlight module
5 light guide plate
51 light incident surface 52 reflective surface
53 Light exit surface 531 Condensing element
6 reflective pieces 7 optical thin film
71 micro light guide 711 peak 711a low peak 711b high peak 8 diffusion film piece 9 optical thin film
91 surface
92 micro light guide 921 peak
9211, 9212, 9213 peak peak L lamp

Claims (24)

A backlight module, at least,
It has at least one light incident surface, a reflection surface, and a light emission surface, and has a plurality of basic forms on the surface of the light emission surface or the reflection surface, and two arc lines are combined. A light guide plate on which a geometric condensing element is installed;
A reflective piece disposed outside the reflective surface of the light guide plate;
An optical thin film installed above the light guide plate and forming a plurality of micro light guides on one surface;
A lamp disposed outside the light incident surface of the light guide plate;
The micro light guide and the main body of the optical thin film are made of the same material, and each micro light guide has two or more peak peaks, and the peak peaks are high or low. A backlight module characterized by having a low peak and a high peak. The backlight module according to claim 1, wherein the micro light guide is made of a material different from that of the main body of the optical thin film. The backlight module according to claim 1, wherein the light condensing elements on the light guide plate have a triangular prism shape spaced apart from each other. The backlight module according to claim 1, wherein the light collecting element protrudes or is recessed. The backlight module according to claim 1, wherein an upper diffusion film is installed on the light guide plate. 4. The backlight module according to claim 1, wherein the low peak of the micro light guide has a left-right continuous curve. 5. 4. The backlight module according to claim 1, wherein the high peak of the micro light guide has a left-right continuous curve. 5. 4. The backlight module according to claim 1, wherein the height of the low peak of the micro light guide is in the form of continuous ups and downs. 5. 4. The backlight module according to claim 1, wherein the height of the high peak of the micro light guide is in the form of continuous ups and downs. 5. 4. The backlight module according to claim 1, wherein the low peak of the micro light guide body simultaneously exhibits a left-right continuous curve and the height is a form of continuous ups and downs. 5. 4. The backlight module according to claim 1, wherein the high peak of the micro light guide body simultaneously exhibits a left-right continuous curve, and the altitude is in the form of a continuous vertical undulation. The high peak and the low peak of the micro light guide body simultaneously exhibit a left-right continuous curve, and the altitude is in the form of an up-down continuous undulation. Backlight module. A backlight module, at least,
It has at least one light incident surface, a reflection surface, and a light emission surface, and has a plurality of basic forms on the surface of the light emission surface or the reflection surface, and two arc lines are combined. A light guide plate on which a geometric condensing element is installed;
A reflective piece disposed outside the reflective surface of the light guide plate;
An optical thin film installed above the light guide plate and forming a plurality of micro light guides on one surface;
A lamp disposed outside the light incident surface of the light guide plate;
The micro light guide and the main body of the optical thin film are made of the same material, and each micro light guide has two or more peak peaks, and the peak peaks are high or low. A backlight module characterized by being homologous. The backlight module according to claim 13, wherein the micro light guide is made of a material different from that of the main body of the optical thin film. The backlight module according to claim 13, wherein the condensing elements on the light guide plate have a triangular prism shape spaced apart from each other. 16. The backlight module according to claim 13, wherein the light collecting element protrudes or is recessed. The backlight module according to claim 13, wherein an upper diffusion film is installed on the light guide plate. 16. The backlight module according to claim 13, 14 or 15, wherein a part of the top of the micro light guide has a left-right continuous curve and a part of the top is in a straight line shape. 16. The backlight module according to claim 13, 14 or 15, wherein each peak of the micro light guide has a left-right continuous curved shape. 16. The backlight module according to claim 13, 14 or 15, wherein the height of each peak of the micro light guide is in the form of up and down continuous undulations. 16. The backlight module according to claim 13, 14, or 15, wherein a part of the top of the micro light guide has a continuous undulation, and a part of the top of the micro light guide has a uniform height. 16. The backlight module according to claim 13, 14 or 15, wherein each peak of the micro light guide has a left and right continuous curve, and all the altitudes are in a vertically undulating form. 15. A part of the peak of the micro light guide simultaneously exhibits a left-right continuous curve, and the altitude has a form of continuous up-and-down undulation, and a part of the peak is a straight form. Or the backlight module of 15. 16. The backlight module according to claim 13, 14, or 15, wherein a part of the top of the micro light guide has a left-right continuous curve, and a part of the top of the micro light guide is in the form of up-down continuous undulations.

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