KR200388512Y1 - Edge-type Backlight Module with a Curved Lamp - Google Patents

Abstract

The present invention relates to an edge type back light module, and particularly includes a light guide plate, a lamp cover, and a lamp located under a display panel, and the lamp has a bent portion and is installed in the lamp cover to provide light. A side backlight module for firing on the side of a light guide plate is provided.

Description

Edge-type Backlight Module with a Curved Lamp

The present invention relates to a side edge backlight module, and more particularly to a side backlight module having a curved lamp.

Since the liquid crystal itself does not emit light, the backlight module is an essential component of the liquid crystal monitor panel. Its main function is to provide a light source with sufficient brightness and even distribution so that the LCD panel can display the image properly. As LCD applications become more widespread in a number of potential areas of growth, such as monitors, notebook computers, digital cameras and projectors, the demand for backlight modules and related accessories is steadily growing.

In general, the backlight module adopts two designs depending on the position of the light source, a direct type backlight module in which the light source is directly under the display panel, and an edge type backlight module in which the light source is located at the side of the display panel. have. Among these, the side backlight module lowers the volume and manufacturing cost of the LCD monitor because it places the light source generator on the side of the display panel, and is applied to small home appliances.

As shown in FIG. 1, the conventional side backlight module 10 is positioned below the display panel 12. The side backlight module 10 is formed of a light guide plate (LPG) 14 positioned below the display panel 12, mainly a cold cathode fluorescent lamp (CCFL), and thus, a part of the light guide plate 14. A plurality of linear light plates 16 positioned on the side, a lamp cover 18 positioned outside the plurality of linear light plates 16, and a light passing through the light guide plate 14 downwards under the light guide plate 14; The linear lamp 16 while being installed on both the reflective sheet 20, the optical material layer 22 positioned between the light guide plate 14 and the display panel 12, and the linear lamp 16; It includes two lamp fixing material 24 for fixing the. Among these, the linear lamp 16 serves as a light source for supplying light to the display panel 12, and the lamp cover 18 and the reflective sheet 20 transmit light generated by the linear lamp 16 to the light guide plate 14. By reflecting, the use of light is increased to obtain high quality luminance. A scattering point under the light guide plate 14 prevents light from fully reflecting from the light guide plate 14 and causes the light to refract through the light guide plate 14 to enter the optical material layer 22 and to enter the optical material layer. Atom 22 atomizes and condenses the light refracted by the light guide plate 14 to supply a light source with uniform and high viewing angle to the display panel 12. 2 is an explanatory diagram showing that a linear lamp of a conventional side backlight module emits light onto a conduit plate. After the lamp cover 18 surrounds the linear lamp 16 and connects with the lamp holder 24, the linear lamp 16 supplies the light guide plate 14 with a uniform light source from one side, and the lamp cover 18 and the reflective sheet. 20 reflects the light generated by the linear lamp 16 to the conduit plate 14 to increase the use rate of the light to obtain a high quality brightness.

3 is a tangential explanatory diagram of a straight lamp 16 of the conventional side-type backlight module 10. Every straight lamp 16 includes one High Votage Electrode 26 and one Low Votage Electrode 28, respectively. The side backlight module 10 also includes an inverter 30, which converts the DC power into the working voltage required for the linear lamp 16, and the high voltage electrode 26 and the low voltage electrode are respectively high and low voltage. It is connected to the inverter 30 through a lead and discharged through a high voltage difference (Voltage Difference) of the inverter 30 to drive the linear lamp 16 to emit light. At this time, the number of electrodes of the linear lamp 16 and the number of contacts with the lead wire are twice the quantity of the linear lamp 16, and the high voltage electrode 6 and the low voltage electrode 28 of the linear lamp 16 are located at both sides. As the current of the linear lamp 16 gradually increases, the linear lamp 16 is turned on daily from the high voltage electrode 26 to the low voltage electrode 28 according to the direction of the arrow in the linear lamp 16 of FIG. All 16 lights up.

Conventionally, the side type backlight module 10 uses the linear lamp 16 as a light source in order to obtain high brightness, but when the quantity of the linear lamp 16 increases, the number of electrodes of the linear lamp 16 and the number of contacts with the lead wire are the same. This increases the complexity of the layout and increases the probability of poor quality. In addition, the amount of heat generated by the electrode is a major cause of the amount of heat generated by the side type backlight module 10, and the temperature of the linear lamp 16 is too high to lower the bladder efficiency of the lamp, which is necessary when driving the linear lamp 16. It also increases power. Since not only a large amount of heat is generated due to too many electrodes of the conventional side-type backlight module 10, but also the high voltage electrode 26 and the inverter 30 of the linear lamp 16 are generally mounted on the same side of the display panel 12. If the heat generation is easy and the temperature is high, the heat generated in the process of use cannot be dissipated smoothly and accumulates and the temperature of both sides of the display panel 12 is not uniform. In addition to the impact, the display quality is also lowered and the service life of peripheral components is greatly reduced. In addition, since the high voltage electrode 6 and the low voltage electrode 28 of the linear lamp 16 are located at both sides, and the linear lamp 16 uses a process using the fluorescence siphon principle, the high voltage of the linear lamp 16 is increased. Both of the electrode 6 and the low voltage electrode 28 may cause chromatic aberration when the lighting is turned on, and thus brightness of both sides of the display panel 12 is not uniform, affecting the quality of the display screen.

An object of the present invention is to provide a side backlight module to solve the problems listed above.

The claims of the present invention are directed to an edge type back light module, and particularly include a light guide plate, a lamp cover, and a lamp located under a display panel, and have a bent portion to be installed in the lamp cover. And a side backlight module for firing a light into a side of the light guide plate.

4 is a functional block diagram of a computer device according to the present invention. The computer device 32 may use a notebook and the computer device 32 is electrically connected to the process module 34 and the process module 34 which controls the operation of the computer device 32 and sent from the process module 34. And a display device 36 for displaying the material on the screen. The display device 36 includes a display panel 52 and a side backlight module 50.

5 is an explanatory view of a side backlight module of a first embodiment according to the present invention. As shown in FIG. 5, the side backlight module 50 is installed under the display panel 52. The side backlight module 50 is formed of a light guide plate 54 positioned below the display panel 52, mainly a cold cathode fluorescent lamp (CCFL), and a plurality of U-shaped panels positioned on one side of the light guide plate 54. The lamp 56, the lamp cover 58 located outside of the U-shaped lamp 56, the reflective sheet 60 located below the light guide plate 54, and the optical positioned between the light guide plate 54 and the display panel 52. It is provided on both the material layer 62 and the U-shaped lamp 56 and includes two lamp fixing materials 64 for fixing the U-shaped lamp 56. Among these, the U-shaped lamp 56 serves as a light source for supplying light to the display panel 52, and the lamp cover 58 and the reflective sheet 60 may emit light generated by the U-shaped lamp 56. By reflecting the light, the brightness of the light is increased to obtain good luminance. The light guide plate 54 scatters and emits the light generated by the U-shaped lamp 56 to the optical material layer 62, and the optical material layer 62 atomizes and condenses the light reflected from the light guide plate 54 to display the light. The light source is supplied to the panel 52 with a uniform and high vertical viewing angle.

The light source of the side type backlight module 50 is a plurality of U-shaped lamps 56 positioned on one side of the light guide plate 54. In the present embodiment, two U-shaped lamps 56 are alternately arranged, that is, adjacent to each other. The open ends of the two U-shaped lamps 56 respectively face both sides of the display panel 52 and the two open ends of the single U-shaped lamp 56 are installed in the same lamp holder 64 and the U-shaped lamp 56 Since the curved portion of is hidden in one of the lamp holders 64, it is possible to hide a portion in the lamp holder 64 which has a relatively poor brightness and a relatively fast luminance decay rate. 6 is an explanatory view showing that the U-shaped lamp 56 of the side backlight module 50 according to the present invention emits light to the conduit plate 54. As shown in FIG. 6, the lamp holder 64 is assembled inside the lamp cover 58 after wrapping the curved portion of the U-shaped lamp 56 and the portion of the straight lamp. The U-shaped lamp 56 supplies the light guide plate 54 with a unidirectional uniform light source, and the lamp cover 58 and the reflective sheet 60 reflect the light generated by the U-shaped lamp 56 to the light guide plate 54 to provide light. Increasing the usage rate to obtain a good brightness.

7 is an explanatory diagram of the tangential shape of the U-shaped lamp 56 of the side backlight module 50. As shown in FIG. 7, the two open sides of the open end of all U-shaped lamps 56 are electrically connected to the high voltage electrode 66. The side backlight module 50 also includes an inverter 70, which converts a DC power source into a working voltage required for the U-type lamp 56. The inverter 70 may use a floating-typing inverter, and two high voltage electrodes 66 are connected to the inverter 70 using conductive wires, respectively, and the U-type lamp 56 through the inverter 70. Drive it to shine. Since the inverter 70 inputs an AC voltage having a phase difference to the high voltage electrode 66, the U-type lamp 56 can be driven to emit light, and the luminance of the U-type lamp 56 is determined by the input current. As it increases, the light becomes brighter and the brightness of the lamp is gradually turned on by the lamp bent at the high voltage electrodes 66 of the two open ends in the direction of the arrow in the U-shaped lamp 56 of FIG. It does not gradually light up from one open end to another, reducing the load on the drive voltage. The light emitting surface formed by two adjacent U-shaped lamps 56 intersected with each other is the same as the light emitting surface formed by four straight lamps, but the number of electrodes and the number of contacts with the lead of the U-shaped lamp 56 are four Since only half of the amount of the linear lamp is generated, the amount of heat generated and the power consumed on the electrode side is lower than that of using four linear lamps. Thus, the U-type lamp 56 can be used in a relatively efficient working environment and the luminous efficiency Also increases. In addition, when the inverter 70 is added to the design excluding the low-voltage wire, the wire drawing method is simplified, which effectively reduces the instability of the quality due to the complicated wire arrangement. In addition, since the two U-shaped lamps 56 are cross-arranged, chromatic aberration of both sides of the lamp manufactured through the process using the fluorescence siphon principle is improved as a whole, so that the display panel 52 has a more uniform chromaticity distribution. Is achieved. In addition, since the high voltage electrode 66 of the U type lamp 56 may be uniformly installed on both sides of the side type backlight module 50 when the two U type lamps 56 are arranged to cross each other, the high pressure electrode 66 is easy to generate heat. ) Can be distributed to prevent the phenomenon of concentration of heat source.

FIG. 8 is an explanatory view of a second embodiment side backlight module according to the present invention, and FIG. 9 is a U-shaped lamp 56 of a second embodiment side backlight module according to the present invention, which transmits light to a conduit plate 54. It is explanatory drawing to show firing. The part structure and the principle of operation of the side backlight module 80 are similar to those of the side backlight module 50 of the first embodiment. The side backlight module 80 is installed under the display panel 52. The side backlight module 80 is formed of a light guide plate 54 positioned below the display panel 52, mainly a cold cathode fluorescent lamp (CCFL), and two U-shaped panels positioned on one side of the light guide plate 54. The lamp 56, the lamp cover 58 located outside of the U-shaped lamp 56, the reflective sheet 60 located below the light guide plate 54, and the optical positioned between the light guide plate 54 and the display panel 52. It is provided on both the material layer 62 and the U-shaped lamp 56 and includes two lamp fixing materials 64 for fixing the U-shaped lamp 56. Among these, the U-shaped lamp 56 serves as a light source for supplying light to the display panel 52, and the lamp cover 58 and the reflective sheet 60 may emit light generated by the U-shaped lamp 56. By reflecting the light, the brightness of the light is increased to obtain good luminance. The light guide plate 54 scatters and emits the light generated by the U-shaped lamp 56 to the optical material layer 62, and the optical material layer 62 atomizes and condenses the light reflected from the light guide plate 54 to display the light. The light source is supplied to the panel 52 with a uniform and high vertical viewing angle. As shown in FIG. 9, the lamp holder 64 is assembled inside the lamp cover 58 after wrapping the curved portion of the U-shaped lamp 56 and the portion of the straight lamp. The U-shaped lamp 56 supplies the light guide plate 54 with a unidirectional uniform light source, and the lamp cover 58 and the reflective sheet 60 reflect the light generated by the U-shaped lamp 56 to the light guide plate 54 to provide light. Increasing the usage rate to obtain a good brightness. The difference between the second embodiment and the first embodiment is that the two U-shaped lamps 56 are arranged in an inclined manner. The light emitting surface thus formed is the same as the light emitting surface formed by the four linear lamps, but since the number of electrodes and the number of contacts with the lead wire are only half that of the four straight lamps, the heat generated and the power consumed at the electrode side are all four. Lower than when using two straight lamps. In addition, since the U-shaped lamps 56 are inclined to cross each other, the thickness of the lamp holder 64 may be reduced, and the overall height of the side type backlight module 80 may be lowered.

Fig. 10 is an explanatory diagram showing that the third embodiment side backlight module 82 according to the present invention emits light to the conduit plate 540. As shown in Fig. 10, a part of the side backlight module 82 is shown. The structure and the principle of operation of the components are similar to the side backlight module 50 of the second embodiment The side backlight module 82 is installed under the display panel 52. In this embodiment, the two U-shaped lamps 56 ) Is generated on the electrode side because the light emitting surface thus formed is the same as the light emitting surface formed by the four straight lamps, but the number of electrodes and the number of contacts with the lead are only half the amount of four straight lamps. The amount of heat consumed and the power consumed are all lower than when using four linear lamps, but the present embodiment differs from the above embodiment in that the U-shaped lamp 5 A part of 6) is installed on the side of the light guide plate 54, a part is installed below the light guide plate 54, and the U-shaped lamp 56 supplies a uniform light source in the unidirectional direction of the light guide plate 54. In this embodiment, the U-shaped lamp Since 56 is arranged in an inclined manner and a portion of the U-shaped lamp 56 is installed under the light guide plate 54, the overall height of the side backlight module 82 may be lowered.

FIG. 11 is an explanatory view of a fourth embodiment side backlight module 90 according to the present invention, and FIG. 12 is a conduit plate 54 of a lamp of the fourth embodiment side backlight module 90 according to the present invention. It is explanatory drawing which shows to fire at. The component structure and the principle of operation of the side backlight module 90 are similar to those of the side backlight module 50 of the first embodiment. The side backlight module 90 is installed under the display panel 52. The side backlight module 90 is formed of a light guide plate 54 positioned below the display panel 52, mainly a cold cathode fluorescent lamp (CCFL), and one U-shaped plate positioned on one side of the light guide plate 54. Lamp 56, one straight lamp 92 positioned between two lamp arms of U-shaped lamp 56, and a lamp cover located outside of U-shaped lamp 56 and straight lamp 92 ( 58), the reflective sheet 60 under the light guide plate 54, the optical material layer 62 positioned between the light guide plate 54 and the display panel 52, and the U-shaped lamp 56 and the linear lamp 92. It is installed on both sides and includes two lamp fixing material 64 for fixing the U-shaped lamp 56 and the linear lamp 92. Among these, the U-shaped lamp 56 and the linear lamp 92 serve as a light source for supplying light to the display panel 52, and the lamp cover 58 and the reflective sheet 60 are linear with the U-shaped lamp 56. The light generated by the lamp 92 is reflected on the light guide plate 54 to increase the use rate of the light to obtain high quality luminance. The light guide plate 54 scatters and emits light generated by the U-type lamp 56 and the linear lamp 92 to the optical material layer 62, and the optical material layer 62 sprays the light reflected from the light guide plate 54. Atomizing and condensing the light to supply the light source with uniform and high viewing angle to the display panel 52. As shown in FIG. 12, the lamp holder 64 wraps both the curved portion of the U-shaped lamp 56, the portion of the straight lamp, and both of the straight lamp 92, and then assembles inside the lamp cover 58. The U-shaped lamp 56 and the linear lamp 92 supply the light guide plate 54 unidirectional uniform light source, and the lamp cover 58 and the reflective sheet 60 are generated from the U-shaped lamp 56 and the linear lamp 92. The reflected light is reflected on the light guide plate 54 to increase the use rate of the light to obtain high quality luminance. In this embodiment, since one U-shaped lamp 56 is added to one linear lamp 92 to supply the light guide plate 54 with a unidirectional uniform light source, the light emitting surface thus formed is formed by the light emitting surface formed by the three linear lamps. Although the number of electrodes and the number of contacts with the lead wire are smaller than those of the three linear lamps, the amount of heat generated and the power consumed by the electrodes are lower than those of the three linear lamps. In other words, the light source of the side type backlight module 90 can be added to the U-shaped lamp 56 according to the present invention in addition to the conventional straight lamp 92, the quantity can be determined according to the design demand.

Taken together, the main idea of the present invention is to use a curved lamp as a light source of the side backlight module, which can reduce the number of electrodes of the entire lamp and the number of contacts with the leads, The total calories generated and power dissipated can be reduced, effectively reducing the complexity of conductor placement. Therefore, the arrangement method of the various U-shaped lamps can be varied. For example, it is possible to change the number of installations of the U-shaped lamps accordingly, or to install the open ends of all the U-shaped lamps on the same lamp holder or to install all the bent portions of all the U-shaped lamps on different lamp holders, Alternatively, various types of U-shaped lamps and linear lamps may be combined in various ways to be used as a light source, and even lamps having different shapes, for example, S-shaped lamps, may be used as light sources. Belongs to the scope of protection.

Although the present invention has been described in detail only with respect to the appropriate embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the claims of the present invention, and such variations and modifications belong to the appended claims. will be.

Compared with a conventional side backlight module, the side backlight module according to the present invention replaces a conventional straight lamp with a curved lamp and serves as a light source of the side backlight module. This effectively reduces the number of electrodes in the lamp and the number of contacts with the lead wires and lowers the total amount of heat generated by all the electrodes, allowing the lamp to be used in a relatively efficient working environment, increasing luminous efficiency and reducing power consumption. Can be. And the simplified wire placement method greatly improves the unstable quality problem of the complicated layout method. In addition, since the design of the U-type lamp is replaced and arranged, the chromatic aberration of both sides of the lamp manufactured through the process using the fluorescence siphon principle is improved as a whole, resulting in a more uniform chromaticity distribution of the display panel. In addition, the high voltage electrodes of the U-type lamp are installed on both sides of the side backlight module to prevent the heat source from concentrating, effectively lowering the temperature of the entire backlight module, increasing the efficiency of the lamp, and improving the screen quality. Improve.

1 is an explanatory view of a conventional side type backlight module.

FIG. 2 is an explanatory view showing that a linear lamp of a conventional side backlight module emits light onto a conduit plate. FIG.

3 is an explanatory view of a straight lamp tangent of a conventional side backlight module.

4 is a functional block diagram of a computer device according to the present invention.

5 is an explanatory view of a side backlight module of a first embodiment according to the present invention.

Fig. 6 is an explanatory diagram showing that the U-type lamp of the side-lit backlight module of the first embodiment according to the present invention emits light onto the conduit plate.

7 is an explanatory diagram of the U-type lamp tangent of the side backlight module.

8 is an explanatory view of a side backlight module according to a second embodiment of the present invention.

Fig. 9 is an explanatory diagram showing that the U-type lamp of the side-lit backlight module according to the second embodiment of the present invention emits light onto the conduit plate.

10 is an explanatory diagram showing that the third embodiment side-by-side backlight module according to the present invention emits light to the conduit plate.

11 is an explanatory view of a fourth embodiment side backlight module according to the present invention.

FIG. 12 is an explanatory diagram showing that the lamp of the fourth embodiment side backlight module according to the present invention emits light onto the conduit plate. FIG.

Explanation of symbols for main parts of the drawings

10 side-lit backlight module 12 display panel

14 LGP 16 Straight Lamp

18 lamp cover 20 reflective sheet

22 Layer of optical material 24 Lamp holder

26 High Voltage Electrode 28 Low Voltage Electrode

30 inverter 32 computer unit

34 Process Module 36 Display Unit

50 side-lit backlight module 53 display panel

54 LGP 56 U-shaped lamp

58 lamp cover 60 reflective sheet

62 layer of optical material 64 lamp holder

66 high voltage electrode 70 inverter

80 Side Backlight Module 82 Side Backlight Module

90 Side Backlight Module 92 Straight Lamp

Claims (13)

The light guide plate, A lamp cover on which the light guide plate is located at a side thereof; And a lamp having a bent portion and installed in the lamp cover to emit light to the side of the light guide plate. The method of claim 1, And two lamp holders positioned on both sides of the lamp. The method of claim 1, And said lamp is a U-type lamp. The method of claim 3, wherein And two lamp holders separately provided on both sides of the lamp, wherein two open sides of the open end of the lamp are installed in the same lamp holder. The method of claim 4, wherein And the curved portion of the lamp is hidden in one of the lamp holders. The method of claim 4, wherein And two open sides of the open end of the lamp are electrically connected to two high voltage electrodes. The method of claim 6, And an inverter electrically connected to the two high voltage electrodes of the lamp and converting power to a working voltage required for the lamp. The method of claim 3, wherein Side lamp module characterized in that the lamp arm (Arrm) of two adjacent lamps are arranged cross each other. The method of claim 4, wherein And the open ends of two adjacent lamps are respectively installed in different lamp holders. The method of claim 3, wherein And a straight lamp installed between two lamp arms of the lamp. The method of claim 1, And a reflective sheet positioned under the light guide plate and the lamp and reflecting light passing through the light guide plate downward to the light guide plate. The method of claim 1, And said lamp is a cold cathode fluorescent lamp (CCFL). The method of claim 1, And said lamp is an S-type lamp.