JP2009117247A - Planar light source and image display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dust from invading from the outside into the inside of a housing case to prevent deterioration of image quality. <P>SOLUTION: A planar light source includes fluorescent lamps formed cylindrically 9, 9, ..., a diffusion member 10 to diffuse emitted light from the fluorescent lamps, a plurality of reflection members 11, 11, ... which are arranged interposing the fluorescent lamps between the diffusion member and the reflection members and facing the reflection member, are formed of a resin material and reflects emitted light, and the housing case 4 which houses the fluorescent lamps, the diffusion member and the plurality of reflection members, and has fixing holes 5b, 5b, ..., wherein a reflection unit 8 is constituted by arranging the plurality of reflection members adjacently in the inside of the housing case; the reflection members are provided with recessed parts 12 in which the fluorescent lamps are inserted and which open in the insertion directions of the fluorescent lamps, and overlapped portions 13, 14, 15, 16 which continue to the outer peripheries of the recessed parts and are overlapped with parts of the adjacent reflection members; and gaps 20, 21 are formed between the recessed parts of the adjacent reflection members. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technical field regarding a surface light source device and an image display device. Specifically, a technique for preventing the deterioration of image quality by preventing the entry of foreign matters such as dust from the outside into the inside of the storage case by overlapping a part of a plurality of reflecting members that reflect light emitted from the light source Related to the field.

  There is a surface light source device that performs illumination using a fluorescent lamp such as a cold cathode fluorescent lamp (CCFL). A surface light source device is used, for example, as an illumination device using a light source as direct illumination, or used in an image display device such as a television receiver using a light source as backlight illumination.

  In such an image display device, a surface light source device is arranged on the back side of a display panel such as a liquid crystal panel for displaying an image. In the surface light source device, for example, necessary parts are arranged in a storage case opened on the display panel side, and a diffusion member (diffusion plate) arranged opposite to the back surface of the display panel and the back surface of the diffusion member In some cases, a fluorescent lamp is disposed as backlight illumination between the diffusing member and the reflecting member.

  In the surface light source device, when light as a backlight is emitted from the fluorescent lamp, the emitted light is diffused by the diffusion plate and irradiated toward the display panel. At this time, light is also emitted from the fluorescent lamp to the reflecting member side, but the light emitted to the reflecting member side is reflected by the reflecting member and incident on the diffusion plate, and is diffused by the diffusion plate and directed toward the display panel. Irradiated.

  Therefore, the light emitted from the fluorescent lamp to the reflecting member side is also used as light for irradiating the display panel, and the use efficiency of the light emitted from the fluorescent lamp can be improved by using the reflecting member.

  Some conventional image display apparatuses include a storage case opened on the display panel side made of a resin material, and the bottom surface of the storage case is provided as a reflection part having the same function as the reflection member ( For example, see Patent Document 1). In such an image display device, since the reflecting portion is formed of a resin material with high molding accuracy, a good function of the reflecting portion can be ensured.

  However, in recent years, the display panel has a tendency to increase in size of the display panel, and as the display panel increases in size, the reflection portion also increases in size. For example, the temperature at which light is emitted from a fluorescent lamp Since the reflective part formed of the resin material is large when the temperature changes or when used at high or low temperatures, the amount of deformation of the reflective part caused by expansion or contraction due to changes in temperature conditions increases. . In particular, since a part of the storage case is integrally formed as a reflection part, the thermal effect exerted on the storage case directly affects the reflection part, and the deformation amount of the reflection part due to expansion or contraction may increase.

  When the amount of deformation due to expansion or contraction of the reflecting portion increases, the position of the reflecting portion with respect to the fluorescent lamp changes greatly, and the light emitted from the fluorescent lamp and reflected by the reflecting portion is reflected in the required direction. This may make it difficult to reduce the functionality of the surface light source device.

  Therefore, in the conventional image display device, the reflecting member is formed for each fluorescent lamp by a material different from that of the storage case, and these reflecting members are arranged adjacent to each other, and the reflecting member is deformed by expansion or contraction. There is one in which the amount is reduced to prevent a decrease in functionality of the surface light source device (see, for example, Patent Document 2).

Japanese Patent No. 3205373 JP-A-1-267690

  By the way, the storage case of the surface light source device is generally formed with a plurality of mounting holes for mounting each member such as a circuit board, and foreign matter such as dust is introduced into the storage case from the outside through the mounting holes. There is a risk of intrusion.

  However, in the image display device described in Patent Document 2 described above, since a plurality of reflecting members are arranged adjacent to each other, if a gap is generated between the adjacent reflecting members, a storage case is externally provided. There is a possibility that foreign matter such as dust that has entered the inside of the lamp adheres to the diffusing member or the fluorescent lamp, adversely affects the characteristics of the diffusing member or the fluorescent lamp, and deteriorates the quality of the image displayed on the display panel.

  In particular, a gap that may be generated between adjacent reflecting members may become large due to expansion and contraction of the reflecting member due to a temperature change, and when such a temperature change occurs, there is a risk that image quality is significantly deteriorated.

  Accordingly, the surface light source device and the image display device of the present invention have an object of overcoming the above-described problems and preventing the deterioration of the image quality by preventing the entry of foreign matters such as dust from the outside into the inside of the storage case. To do.

  In order to solve the above-described problems, the surface light source device includes a fluorescent lamp that is used as a light source and is formed in a cylindrical shape that is long in a predetermined direction, a diffusion member that diffuses light emitted from the fluorescent lamp, and the fluorescent light A plurality of reflecting members disposed on the opposite side of the diffusing member across the lamp and formed of a resin material to reflect light emitted from the fluorescent lamp, and the fluorescent lamp, the diffusing member, and the plurality of members inside A reflection case is provided, and a reflection unit is configured by arranging the plurality of reflection members adjacent to each other inside the storage case. A concave portion formed in a concave shape in which the fluorescent lamp is inserted and opened in the insertion direction of the fluorescent lamp and extending in the longitudinal direction of the fluorescent lamp, and an outside of the concave portion. Continuously section provided overlapping portion which is overlapped with a portion of the adjacent said reflecting member is obtained by forming a gap between the concave portion of the adjacent reflecting member.

  Therefore, in the surface light source device, the contact state with the adjacent reflecting member is ensured by the overlap portion.

  In the surface light source device, in order to prevent the intrusion of foreign matter such as dust into the storage case, the surface of the storage case is positioned on the opposite side of the diffusion member with the reflection unit interposed therebetween. It is possible to arrange a dustproof film that closes the mounting hole.

  The reflecting member may be provided with a pair of lamp holding projections that protrude in the insertion direction from the concave portion and sandwich the fluorescent lamp.

  In addition, contact holding portions that are in point contact with the outer peripheral surfaces of the fluorescent lamps are provided on the mutually opposing surfaces of the pair of lamp holding projections of the reflecting member, and heat transfer between the reflecting member and the fluorescent lamp is performed. It is desirable to make it difficult to perform.

  Further, a contact protrusion is provided between the pair of lamp holding protrusions of the reflecting member so as to protrude from the concave portion in the insertion direction and make point contact with the outer peripheral surface of the fluorescent lamp, so that the fluorescent lamp is brought into a pair of contacts. It is preferable to hold in a state of point contact by the holding portion and the contact protrusion.

  In order to solve the above-described problems, the image display device includes a display panel for displaying an image, a fluorescent lamp that is used as a light source and is formed in a long cylindrical shape in a predetermined direction, and is emitted from the fluorescent lamp. A diffusing member that diffuses light; a plurality of reflecting members that are disposed on the opposite side of the diffusing member across the fluorescent lamp and that are formed of a resin material and reflect light emitted from the fluorescent lamp; A fluorescent lamp, the diffusing member, and a storage case having a mounting hole for storing the plurality of reflection members and attaching a predetermined member are provided, and the plurality of reflection members are disposed adjacent to each other inside the storage case. The reflection unit is constituted by the concave member extending in the longitudinal direction of the fluorescent lamp. The fluorescent lamp is inserted into the reflective member and opens in the insertion direction of the fluorescent lamp. Provided with a concave portion formed on the outer peripheral portion of the concave portion and an overlapping portion that overlaps with a part of the reflective member adjacent to and adjacent to the outer peripheral portion of the concave portion, and a gap is formed between the concave portions of the adjacent reflective members. It is.

  Therefore, in the image display device, the contact state with the adjacent reflecting member is ensured by the overlap portion.

  The surface light source device of the present invention includes a fluorescent lamp used as a light source and formed in a long cylindrical shape in a predetermined direction, a diffusion member that diffuses light emitted from the fluorescent lamp, and the diffusion member sandwiching the fluorescent lamp And a plurality of reflecting members that are disposed on the opposite side and that are formed of a resin material and reflect the light emitted from the fluorescent lamp, and the fluorescent lamp, the diffusing member, and the plurality of reflecting members are housed inside the predetermined reflecting member. A storage case having a mounting hole for mounting a member, and a plurality of the reflection members are arranged adjacent to each other inside the storage case to form a reflection unit. The reflection member includes the fluorescent lamp. A concave portion formed in a concave shape that is inserted and opened in the insertion direction of the fluorescent lamp and extends in the longitudinal direction of the fluorescent lamp, and an upper portion that is continuous and adjacent to the outer peripheral portion of the concave portion. The overlap portion which is overlapped with a portion of the reflecting member is provided, characterized by being formed a gap between the concave portion of the adjacent reflecting member.

  Therefore, even when foreign matter such as dust enters the inside of the storage case through the mounting hole formed in the storage case, the foreign matter such as dust enters the diffusion member side from the reflection unit and the diffusion member or Without being attached to the fluorescent lamp, the functionality of these parts is prevented from being lowered, and the quality of the image displayed on the display panel can be prevented from being lowered.

  In the invention described in claim 2, since the dustproof film for closing the mounting hole is arranged at the position opposite to the diffusing member across the reflection unit inside the storage case, It is possible to prevent foreign matter such as dust from entering the storage case.

  In the invention described in claim 3, since the reflecting member is provided with a pair of lamp holding projections that protrude from the concave portion in the insertion direction and sandwich the fluorescent lamp, the fluorescent lamp is formed by the reflecting member. By holding, the fluorescent lamp can be accurately positioned with respect to the reflecting member, and the functionality of the surface light source device can be improved.

  In the invention described in claim 4, since the contact holding portions that are point-contacted with the outer peripheral surface of the fluorescent lamp are provided on the mutually opposing surfaces of the pair of lamp holding projections of the reflecting member, Heat transfer between the fluorescent lamp and the reflecting member is difficult to be performed, and the temperature drop of the fluorescent lamp at the time of light emission is suppressed, so that a good function of the fluorescent lamp can be secured and the temperature rise of the reflecting member is suppressed. Thus, the amount of deformation due to thermal expansion of the reflecting member can be reduced.

  In the invention described in claim 5, the contact protrusion between the pair of lamp holding protrusions of the reflecting member that protrudes in the insertion direction from the concave portion and makes point contact with the outer peripheral surface of the fluorescent lamp. Since the heat transfer between the fluorescent lamp and the reflecting member is difficult to be performed, the temperature drop of the fluorescent lamp at the time of light emission is suppressed, and a good function of the fluorescent lamp can be secured and reflected. The temperature rise of the member is suppressed, and the amount of deformation due to the thermal expansion of the reflecting member can be reduced.

  The image display device of the present invention includes a display panel for displaying an image, a fluorescent lamp that is used as a light source and formed in a long cylindrical shape in a predetermined direction, and a diffusion member that diffuses light emitted from the fluorescent lamp. A plurality of reflecting members which are arranged on the opposite side of the diffusing member with the fluorescent lamp interposed therebetween and which are formed of a resin material and reflect the light emitted from the fluorescent lamp, and the fluorescent lamp and the diffusing member inside. And a storage case having a mounting hole for storing the plurality of reflection members and attaching a predetermined member, and the plurality of reflection members are arranged adjacent to each other inside the storage case to constitute a reflection unit. A concave portion formed in a concave shape in which the fluorescent lamp is inserted into the reflecting member and opens in the insertion direction of the fluorescent lamp and extends in the longitudinal direction of the fluorescent lamp; The overlap portion which is overlapped with a portion of the reflective member adjacent continuous with the outer peripheral portion of the concave portion is provided, characterized by being formed a gap between the concave portion of the adjacent reflecting member.

  Therefore, even when foreign matter such as dust enters the inside of the storage case through the mounting hole formed in the storage case, the foreign matter such as dust enters the diffusion member side from the reflection unit and the diffusion member or Without being attached to the fluorescent lamp, the functionality of these parts is prevented from being lowered, and the quality of the image displayed on the display panel can be prevented from being lowered.

  The best mode for carrying out the surface light source device and the image display device of the present invention will be described below with reference to the accompanying drawings.

  In the best mode shown below, the image display device of the present invention is applied to a television receiver that displays an image on a liquid crystal panel. The surface light source device of the present invention is provided in the television receiver. This is applied to a surface light source device.

  The scope of application of the present invention is not limited to a television receiver having a liquid crystal panel and a surface light source device provided in the television receiver, and other various television receivers, image display devices used for personal computers, and the like. And various surface light source devices used therefor.

  The image display device (television receiver) 1 is configured by arranging required parts inside an outer casing (not shown) (see FIG. 1).

  The outer casing is formed in a box shape that is opened forward and backward in a flat shape, and a display panel 2 that displays an image is disposed at a position that closes the opening from the inside. The display panel 2 is configured, for example, by sandwiching a transmissive color liquid crystal panel between two polarizing plates from the front and the rear, and displays a full color image by being driven by an active matrix system.

  For example, a drive circuit 2 a disposed on the lower side of the display panel 2 is connected. The drive circuit 2 a is a circuit that performs drive control on the display panel 2.

  A surface light source device 3 is disposed inside the outer casing. The surface light source device 3 is configured by arranging necessary parts in a storage case 4.

  The storage case 4 is formed of a metal material having high thermal conductivity and rigidity, for example, iron, aluminum, magnesium, or the like, and is formed in a box shape that is open forward and flat, and has a bottom surface portion 5 and a bottom surface portion that face the front and rear direction. 5 and a peripheral surface portion 6 protruding forward from the outer peripheral edge.

  A plurality of holding holes 5a, 5a,... Are formed in the bottom surface portion 5 of the storage case 4 at regular intervals in the vertical and horizontal directions. Mounting holes 5b, 5b,... Are formed in the bottom surface portion 5. The mounting holes 5b, 5b,... Are holes for mounting circuit components, for example.

  A plurality of lamp sockets (not shown) are provided at the left and right end portions inside the storage case 4. The lamp socket serves to attach a fluorescent lamp, which will be described later, to the storage case 4.

  Inside the storage case 4, a dustproof film 7, a reflection unit 8, fluorescent lamps 9, 9,... And a diffusing member 10 are arranged in this order from the rear side, and the diffusing member 10 is positioned facing the display panel 2. ing.

  The dust-proof film 7 has a function of preventing entry of foreign matters such as dust from the mounting holes 5b, 5b,.

  The dust-proof film 7 is formed, for example, in a shape and size that covers the entire surface of the bottom surface portion 5 of the storage case 4 and is inserted into the insertion holes 7a, 7a,... At positions corresponding to the holding holes 5a, 5a,. have. Therefore, in a state where the bottom surface portion 5 is covered from the front by the dust proof film 7, the mounting holes 5b, 5b,... Formed in the bottom surface portion 5 are closed and inserted into the holding holes 5a, 5a,. The holes 7a, 7a,.

  The dust-proof film 7 may have a shape that closes only the mounting holes 5b, 5b,..., But in order to ensure easy arrangement with respect to the storage case 4, the dust-proof film is used as described above. It is desirable to form 7 in a shape and size that covers the entire bottom surface portion 5.

  The reflection unit 8 is formed by combining a plurality of reflection members 11, 11,.

  The reflection member 11 is formed in a predetermined shape from a film-like resin material having high heat resistance, and is formed by hot pressing, vacuum forming, pressure forming, or the like. As the film-like resin material having high heat resistance, for example, a polycarbonate film containing titanium oxide is used. Further, the reflecting member 11 has a function of reflecting the light emitted from the fluorescent lamps 9, 9,... Toward the display panel 2, and the light emitted from the fluorescent lamps 9, 9,. In order to improve the utilization efficiency, it is desirable to have a reflectance of 90% or more.

  As shown in FIG. 2, the reflecting member 11 has a concave portion 12 that opens forward and extends left and right, and overlap portions 13, 14, 15, and 16 that are continuously provided on the outer peripheral portion of the concave portion. ing.

  The concave portion 12 includes a base portion 17 having a substantially U-shaped cross-sectional shape and a step portion 18 having a U-shape projecting diagonally inward from the right edge of the base portion 17. . In the concave portion 12, for example, the upper front edge 12a is located slightly behind the lower front edge 12b.

  The overlap portion 13 is continuously provided on the right side of the concave portion 12, protrudes rightward from the inner peripheral edge of the step portion 18, and has a substantially U-shaped cross section.

  The overlap portion 14 is continuously provided on the left side of the concave portion 12 and is continued to the left end of the base portion 17. The overlap portion 14 has the same cross-sectional shape and size as the cross-sectional shape and size of the concave portion 12.

  The overlap portion 15 is provided continuously above the concave portion 12, above the overlap portion 13, and above the overlap portion 14. The overlap portion 15 is protruded upward from the front edge on the upper side of the base portion 17 and the front edge on the upper side of the overlap portion 14 and is extended upward from the front edge on the upper side of the step portion 18. It consists of the inclined part 15b and the small piece part 15c which protruded upwards from the upper front edge of the overlap part 13. As shown in FIG.

  The overlap portion 16 is continuously provided below the concave portion 12, below the overlap portion 13, and below the overlap portion 14. The overlap portion 16 includes an extended portion 16a protruding downward from the lower front edge of the base portion 17 and the lower front edge of the overlap portion 14, and a lower front edge of the step portion 18 downward. It consists of a protruding inclined portion 16 b and a small piece portion 16 c protruding downward from the lower front edge of the overlap portion 13.

  The extended portion 15a, the inclined portion 15b, and the small piece portion 15c of the overlap portion 15 are positioned slightly behind, for example, the extended portion 16a, the inclined portion 16b, and the small piece portion 16c of the overlap portion 16, respectively. Further, the extended portions 15a and 16a of the overlap portions 15 and 16 are positioned behind the small pieces 15c and 16c of the overlap portions 15 and 16, respectively.

  The reflecting member 11 is provided with a mounted pin 19 that protrudes rearward from the outer peripheral surface of the concave portion 12. The mounted pin 19 is provided at a substantially central portion of the concave portion 12.

  The reflecting members 11, 11,... Are respectively attached to the bottom surface portion 5 of the storage case 4 and are disposed adjacent to each other in the horizontal direction and the vertical direction (see FIGS. 3 to 6).

  The reflection members 11, 11,... Are formed in the bottom holes 5 of the storage case 4 and the insertion pins 7 a, 7 a,. Are inserted into the holding holes 5a, 5a,. The mounted pins 19, 19,... Respectively inserted into the holding holes 5 a, 5 a,... Formed in the bottom surface portion 5 are projected to the rear of the bottom surface portion 5. The parts are heat caulked and the reflecting members 11, 11,... Are fixed to the storage case 4 (see FIG. 5).

  In a state where the reflecting members 11 and 11 are arranged adjacent to each other in the vertical direction, the overlap portion 16 is overlapped with the overlap portion 15 as shown in FIG. At this time, the extended portion 16a, the inclined portion 16b, and the small piece portion 16c of the overlap portion 16 are overlapped with the extended portion 15a, the inclined portion 15b, and the small piece portion 15c of the overlap portion 15, respectively.

  In a state where the reflecting members 11 and 11 are arranged adjacent to each other in the vertical direction, a gap 20 having a predetermined size is formed between the concave and convex portions 12 and 12 positioned in the vertical direction. The size of the gap 20 is set such that the overlap between the overlap portion 15 and the overlap portion 16 is not removed when the reflecting members 11, 11 positioned above and below expand or contract due to temperature changes.

  In a state where the reflecting members 11 and 11 are arranged adjacent to each other in the left-right direction, the overlap portion 13 is superimposed on the overlap portion 14 as shown in FIG.

  In a state in which the reflecting members 11 and 11 are arranged adjacent to each other in the left-right direction, a gap 21 having a predetermined size is formed between the recessed portions 12 and 12 positioned on the left and right. The size of the gap 21 is set such that the overlap between the overlap portion 13 and the overlap portion 14 is not removed when the reflecting members 11, 11 positioned on the left and right are expanded or contracted due to a temperature change.

  As described above, the reflecting members 11 and 11 are arranged adjacent to each other with the overlapping portions 13, 14, 15, and 16 overlapped in the upper, lower, left, and right directions as described above (see FIG. 1). ).

  The reflection unit 8 has an outer shape that is substantially the same size as the bottom surface portion 5 of the storage case 4, and is disposed inside the storage case 4 so as to hold the dustproof film 7 disposed in the storage case 4 from the front.

  In a state where the reflection unit 8 is disposed inside the storage case 4, a cover member (not shown) that covers the outer peripheral portion of the reflection unit 8 is disposed on the inner surface side of the peripheral surface portion 6 of the storage case 4. Therefore, even if there is a gap between the peripheral surface portion 6 of the storage case 4 and the outer peripheral portion of the reflection unit 8, this gap is closed by the covering member.

  The fluorescent lamps 9, 9,... Are, for example, cold cathode fluorescent lamps, are formed in a long cylindrical shape, and are arranged inside the storage case 4 in a direction in which the longitudinal direction is left and right. The fluorescent lamps 9, 9,... Are arranged at equal intervals in the vertical direction, and both end portions in the longitudinal direction are respectively held by lamp sockets provided inside the storage case 4.

  The fluorescent lamp 9 arranged inside the storage case 4 is positioned in a state of being inserted into the reflecting members 11, 11, 11 combined on the left and right. The fluorescent lamp 9 inserted in the reflecting members 11, 11, 11 is not in contact with the reflecting members 11, 11, 11, and as shown in FIG. 5, the outer peripheral surface of the fluorescent lamp 9 and the concave portions 12, 12, 12 The distance from the inner peripheral surface is substantially constant. Therefore, it is difficult for heat generated in the fluorescent lamps 9, 9,... To be transmitted to the reflection unit 8. Therefore, the optical characteristics of the fluorescent lamps 9, 9,. The expansion and contraction due to the temperature change of 8 can be suppressed.

  The diffusing member 10 is formed in a plate shape or a sheet shape, and is disposed inside the storage case 4 so as to cover the fluorescent lamps 9, 9,. The diffusing member 10 has a function of diffusing the light emitted from the fluorescent lamps 9,... So that the amount of light directed to the display panel 2 is made uniform in the plane of the display panel 2. .

  In a state where the diffusing member 10 is disposed inside the storage case 4, the diffusing member 10 is positioned to face the display panel 2 positioned in front of the diffusing member 10.

  In the image display device 1 configured as described above, when light as a backlight is emitted from the fluorescent lamps 9,..., The emitted light is diffused by the diffusing member 10 to the display panel 2. Irradiated toward. At this time, light is also emitted from the fluorescent lamps 9,... Toward the reflection unit 8, but the light emitted toward the reflection unit 8 is reflected by the reflection unit 8 and is incident on the diffusion member 10. The light is diffused by the diffusing member 10 and irradiated toward the display panel 2.

  At the same time, an image is displayed on the display panel 2 by driving the display panel 2 by the drive circuit 2a, and the fluorescent lamps 9, 9,... The emitted light is irradiated from the back side.

  When the image is displayed, the surface light source device 3 rises in temperature due to heat generated when light is emitted from the fluorescent lamps 9,..., And the reflecting members 11 and 11 of the reflecting unit 8 are expanded. However, in the reflection unit 8, since the overlap portions 13, 14, 15, 16 of the adjacent reflection members 11, 11,... Are overlapped, the adjacent reflection members 11, 11,... Are displaced back and forth, up, down, left and right due to thermal expansion, the overlap portions 13, 14, 15, 16 are slid according to the displacement of the adjacent reflecting members 11, 11,. There is no gap between the adjacent reflecting members 11, 11,.

  Further, when the display of the image is finished and the emission of light from the fluorescent lamps 9, 9,... Is finished, the temperature of the surface light source device 3 is lowered, and the reflecting members 11, 11 of the reflecting unit 8 are contracted. In this case, the overlapping portions 13, 14, 15, 16 are slid in accordance with the displacement of the adjacent reflecting members 11, 11,. There is no gap between 11, 11,.

  Therefore, even if foreign matter such as dust has entered the interior of the storage case 4 through the mounting holes 5b, 5b,... An image displayed on the display panel 2 without entering the front side of the reflection unit 8 and adhering to the diffusing member 10 or the fluorescent lamps 9, 9,... The deterioration of quality can be prevented.

  Moreover, since the dust-proof film 7 which covers the attachment holes 5b, 5b,... Formed in the bottom surface portion 5 is disposed inside the storage case 4, storage from the attachment holes 5b, 5b,. Intrusion of foreign matters such as dust into the inside of the case 4 can be prevented.

  Further, as described above, there is no gap between the reflecting members 11, 11,... When light is emitted from the fluorescent lamps 9, 9,. It is possible to prevent the emitted light from reaching the rear side of the reflection unit 8 as leakage light, and to improve the light utilization efficiency.

  Below, the modification of a reflection member is demonstrated (refer FIG.7 and FIG.8). In addition, since the reflection member 11A according to the modification shown below is different from the above-described reflection member 11 only in that a plurality of protrusions protruding forward are provided in the concave portion, Only different parts compared to the reflecting member 11A will be described in detail, and the other parts will be described briefly with the same reference numerals as the same parts in the reflecting member 11.

  The reflection member 11A according to the modification is formed in a predetermined shape by a film-like resin material having high heat resistance, and is formed by hot pressing, vacuum forming, pressure forming, or the like. As the film-like resin material having high heat resistance, for example, a polycarbonate film containing titanium oxide is used. The reflecting member 11A has a function of reflecting the light emitted from the fluorescent lamps 9, 9,... Toward the display panel 2, and the utilization efficiency of the light emitted from the fluorescent lamps 9, 9,. In order to improve this, it is desirable to have a reflectance of 90% or more.

  As shown in FIG. 7, the reflection member 11 </ b> A has a concave portion 12 that opens forward and extends vertically, and overlap portions 13, 14, 15, and 16 that are continuously provided on the outer periphery of the concave portion 12. is doing.

  A pair of lamp holding projections 22, 22 project from the inner surface of the concave portion 12 to be separated from each other upward and downward. The lamp holding protrusions 22 and 22 protrude from a substantially central portion of the concave portion 12 and are formed in a prismatic shape, for example.

  Contact holding portions 23, 23 extending in the front-rear direction are provided on the surfaces 22 a, 22 a facing each other of the lamp holding projection 22. The contact holding parts 23, 23 protrude in a direction approaching each other, and the cross-sectional shape is formed in a semicircular shape.

  A contact protrusion 24 protruding forward is provided between the pair of lamp holding protrusions 22 on the inner surface of the concave portion 12. The contact protrusion 24 is formed in a hemispherical shape.

  In the reflecting member 11A configured as described above, the fluorescent lamp 9 is inserted by press-fitting between the pair of lamp holding projections 22 and 22, and the outer peripheral surface is sandwiched between the pair of lamp holding projections 22 and 22 to reflect the reflecting member. 11A. In a state where the fluorescent lamp 9 is held by the reflecting member 11A, the contact holding portions 23 and 23 of the pair of lamp holding protrusions 22 and 22 and the contact protrusion 24 are in point contact with the outer peripheral surface of the fluorescent lamp 9 (see FIG. 8).

  As described above, the fluorescent lamps 9, 9,... Are held by the reflecting members 11A, 11A,. Therefore, the functionality of the surface light source device 3 can be improved.

  Moreover, since the contact holding parts 23 and 23 which are point-contacted with the outer peripheral surface of the fluorescent lamp 9 are provided on the mutually opposing surfaces 22a and 22a of the pair of lamp holding protrusions 22 and 22, respectively, the fluorescent lamp 9 and the reflection It is difficult to transfer heat between the members 11A, the temperature drop of the fluorescent lamp 9 at the time of light emission can be suppressed, the good function of the fluorescent lamp 9 can be secured, and the temperature rise of the reflecting member 11A can be suppressed. As a result, the amount of deformation of the reflecting member 11A due to thermal expansion can be reduced.

  Furthermore, since the reflection protrusion 11A is provided with the contact protrusion 24 that makes point contact with the outer peripheral surface of the fluorescent lamp 9, it is difficult to transfer heat between the fluorescent lamp 9 and the reflection member 11A, and at the time of light emission. The temperature drop of the fluorescent lamp 9 can be suppressed to ensure a good function of the fluorescent lamp 9, and the temperature rise of the reflecting member 11A can be suppressed to reduce the deformation amount due to the thermal expansion of the reflecting member 11A. .

  In addition, since the contact protrusion 24 has a function of positioning in the insertion direction (front-rear direction) of the fluorescent lamp 9 with respect to the concave portion 12, by using the reflecting member 11A provided with the contact protrusion 24, The positioning accuracy of the fluorescent lamp 9 with respect to the reflecting member 11A can be improved.

  The reflective member 11A may be provided with a mounted pin 19 for attaching the reflective member 11A to the bottom surface portion 5 of the storage case 4. In this case, the reflective member 11A is attached to the storage case 4 by the mounted pin 19. Therefore, it is not necessary to provide a lamp socket for holding the fluorescent lamp 9 inside the storage case 4.

  Conversely, the mounting member 19 for attaching the reflecting member 11A to the bottom surface portion 5 of the storage case 4 may not be provided on the reflecting member 11A. In this case, the fluorescent lamp 9 is provided with the lamp socket and the pair of lamp holding projections. Since 22 and 22 hold | maintain at the storage case 4, the attachment structure with respect to the storage case 4 of 11 A of reflecting members is not required separately.

  In addition, although the example which formed the storage case 4 with metal materials, such as iron, aluminum, and magnesium was shown above, the heat dissipation from the storage case 4 is aimed at by forming the storage case 4 with a metal material. It is possible to suppress an increase in temperature when the fluorescent lamp 9 emits light.

  In addition, when the storage case 4 is formed of a resin material such as polycarbonate, for example, light emitted from the fluorescent lamps 9, 9,... May pass through the storage case 4, but as described above. Further, by forming the storage case 4 from a metal material, it is possible to prevent the light emitted from the fluorescent lamps 9, 9,.

  In addition, although the example which inserts and arrange | positions the one fluorescent lamp 9 in the concave part 12 of the reflective member 11 or the reflective member 11A was shown above, several fluorescent lamps 9, 9, It is also possible to arrange by inserting. With such a configuration, the number of parts can be reduced.

  The specific shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the implementation of the present invention, and the present invention is thereby limited. This technical scope should not be interpreted in a limited way.

FIG. 2 to FIG. 8 show the best mode for carrying out the present invention, and this figure is an exploded perspective view showing an image display device. It is an expansion perspective view of a reflecting member. It is an expansion perspective view which shows the state from which the several reflection member was isolate | separated. It is an expansion perspective view showing the state where a plurality of reflective members were combined. It is an expanded sectional view which shows the state with which the reflection member was combined. FIG. 6 is an enlarged cross-sectional view showing a state in which the reflecting members are combined as seen from a direction different from FIG. 5. It is an expansion perspective view which shows the reflection member which concerns on a modification. It is an expanded sectional view showing the state where the fluorescent lamp was held by the reflective member concerning a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus, 2 ... Display panel, 3 ... Surface light source device, 4 ... Storage case, 5b ... Mounting hole, 7 ... Dust-proof film, 8 ... Reflection unit, 9 ... Fluorescent lamp, 10 ... Diffusing member, 11 ... Reflection Member, 12 ... concave portion, 13 ... overlap portion, 14 ... overlap portion, 15 ... overlap portion, 16 ... overlap portion, 20 ... gap, 21 ... gap, 11A ... reflection member, 22 ... lamp holding projection , * 22a ... opposing surfaces, 23 ... contact holding portion, 24 ... contact protrusion

Claims (6)

A fluorescent lamp used as a light source and formed in a long cylindrical shape in a predetermined direction;
A diffusion member for diffusing the light emitted from the fluorescent lamp;
A plurality of reflecting members disposed on the opposite side of the diffusing member across the fluorescent lamp and formed of a resin material to reflect light emitted from the fluorescent lamp;
A storage case having a mounting hole for storing the fluorescent lamp, the diffusing member, and the plurality of reflecting members and mounting a predetermined member therein,
A reflection unit is configured by arranging the plurality of reflection members adjacent to each other inside the storage case,
The reflection member is inserted in the fluorescent lamp, opens in the insertion direction of the fluorescent lamp and extends in the longitudinal direction of the fluorescent lamp, and a concave portion formed in a concave shape, and the reflection continuously adjacent to the outer periphery of the concave portion. Providing an overlap part to be overlapped with a part of the member,
A surface light source device characterized in that a gap is formed between concave portions of adjacent reflecting members. 2. The surface light source device according to claim 1, wherein a dust-proof film that closes the attachment hole is disposed at a position opposite to the diffusion member with the reflection unit interposed therebetween in the storage case. 2. The surface light source device according to claim 1, wherein the reflecting member is provided with a pair of lamp holding protrusions that protrude from the concave portion in the insertion direction and sandwich the fluorescent lamp. 4. The surface light source device according to claim 3, wherein a contact holding portion that is point-contacted with the outer peripheral surface of the fluorescent lamp is provided on the mutually opposing surfaces of the pair of lamp holding protrusions of the reflecting member. . The contact protrusion which protrudes from the said recessed part to the said insertion direction between the said pair of lamp | ramp holding protrusions of the said reflection member, and is point-contacted with the outer peripheral surface of the said fluorescent lamp is provided. The surface light source device described in 1. A display panel for displaying images;
A fluorescent lamp used as a light source and formed in a long cylindrical shape in a predetermined direction;
A diffusion member for diffusing the light emitted from the fluorescent lamp;
A plurality of reflecting members disposed on the opposite side of the diffusing member across the fluorescent lamp and formed of a resin material to reflect light emitted from the fluorescent lamp;
A storage case having a mounting hole for storing the fluorescent lamp, the diffusing member, and the plurality of reflecting members and mounting a predetermined member therein,
A reflection unit is configured by arranging the plurality of reflection members adjacent to each other inside the storage case,
The reflection member is inserted in the fluorescent lamp, opens in the insertion direction of the fluorescent lamp and extends in the longitudinal direction of the fluorescent lamp, and a concave portion formed in a concave shape, and the reflection continuously adjacent to the outer periphery of the concave portion. Providing an overlap part to be overlapped with a part of the member,
An image display device characterized in that a gap is formed between concave portions of adjacent reflecting members.

Images