JP2006053340A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display having a backlight section comprising structural members in a module so that the components are made common for liquid crystal panels of various sizes and that cost reduction and high productivity are achieved. <P>SOLUTION: A light emitting array 17 is constituted by appropriately combining a first light emitting module 15 and a second light emitting module 16 in accordance with the size of a liquid crystal panel 2. The first light emitting module 15 comprises a combination of a first wiring board 40 on which n of light emitting diodes 2 are fabricated and a first heat pipe 44: the second light emitting module 16 comprises a combination of a second wiring board 51 on which m of light emitting diodes 4 are fabricated and a second heat pipe 53. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid crystal display (LCD) including a transmissive liquid crystal panel.

  Compared with cathode ray tube (CRT) display devices, liquid crystal display devices have a larger display screen, lighter weight, thinner thickness, lower power consumption, etc. (Plasma Display Panel) etc. are used for television receivers and various displays. A liquid crystal display device encapsulates liquid crystal between two transparent substrates of various sizes, and changes the light transmittance by changing the direction of liquid crystal molecules by applying a voltage to optically display a predetermined image or the like. A liquid crystal panel is provided.

  The liquid crystal display device includes a light source unit that supplies illumination light to the liquid crystal panel because the liquid crystal itself of the display medium is not a self-luminous body. As the light source section, a sidelight system that supplies illumination light from the side of the back surface to the liquid crystal panel and a backlight system that directly supplies illumination light from the back surface are generally employed. The backlight unit includes, for example, a light source, a light guide panel that guides illumination light to the liquid crystal panel, a reflection sheet, a lens sheet or a diffusion sheet, and the like. Supply.

  In the backlight unit, a cold cathode fluorescent lamp (CCLF) in which, for example, mercury or xenon is enclosed in a fluorescent tube is used as a conventional light source. Such a backlight unit has problems of solving problems such as insufficient luminous brightness of a cold cathode fluorescent lamp, a relatively short life, or a low brightness region on the cathode side, and uniformity cannot be ensured. It was.

  By the way, in a large sized liquid crystal display device, an area light type backlight (Area Litconfiguration Backlight) is generally provided in which a plurality of long cold cathode fluorescent lamps are arranged on the back surface of a diffusion sheet to supply illumination light to a liquid crystal panel. The apparatus is provided (for example, refer patent document 1). Such area light type backlight devices are also required to solve the above-mentioned problems of the cold cathode fluorescent lamps. In particular, in large-sized television receivers exceeding 30 inches, higher brightness and higher uniformity are required. The problem has become more prominent.

Japanese Patent Laid-Open No. 6-301034

  In a liquid crystal display device, instead of the above-described conventional cold cathode fluorescent lamp, a large number of red, green, and blue light emitting diodes (LEDs: hereinafter referred to as LEDs) are provided on the back side of the diffusion film. An LED area light type backlight device that obtains white light of a composite color by dimensionally arranging has attracted attention. Such an LED backlight device is designed to reduce the cost as the cost of the LED is reduced and to display a high-luminance image or the like on a large liquid crystal panel with low power consumption.

  In general, an LED backlight device is configured by arranging a large number of LEDs in a matrix, but an array of a large number of LEDs is also provided. An array type LED backlight device forms a light emitting unit by arranging a plurality of light emitting block bodies formed by mounting a plurality of LEDs on a wiring board on the same axis at equal intervals. In an LED backlight device, the heat generated from a large number of LEDs rises and heats up inside, causing a large thermal change in each component member, causing color unevenness and affecting electronic components. Problem occurs. Therefore, the LED backlight device includes a heat dissipation structure that efficiently dissipates heat generated from the LEDs.

  On the other hand, liquid crystal display devices of various screen sizes such as 32 inches, 40 inches, and 46 inches are provided according to user needs when used as a television receiver. Conventionally, in a liquid crystal display device, an assembly in which constituent members are manufactured in accordance with the size of the liquid crystal panel has been performed. Therefore, in the conventional liquid crystal display device, the members constituting each part are manufactured and arranged for each screen size, and it becomes difficult to reduce the cost due to the increase in the member cost and the assembly cost and the development efficiency. There was also a problem that productivity was lowered.

  Therefore, according to the present invention, liquid crystal panels can be reduced in cost and productivity can be improved by sharing components with liquid crystal panels having different sizes by providing a backlight unit in which components are modularized. An object is to provide a display device.

  The liquid crystal display device according to the present invention that achieves the above-described object includes a transmissive liquid crystal panel and a transmissive liquid crystal in which a light emitting array in which a large number of light emitting diodes are arranged on the same axis is provided in multiple rows in parallel to each other. A backlight unit that supplies illumination light from the back side of the panel, an optical function sheet block unit that performs a predetermined light conversion process on the illumination light emitted from the backlight unit and supplies the light to the transmissive liquid crystal panel; A light guide block unit that diffuses illumination light emitted from the backlight unit and causes the illumination light to enter the optical function sheet block unit. The liquid crystal display device forms a light emitting array by selecting a predetermined number of first light emitting module bodies and second light emitting module bodies according to the size of the transmissive liquid crystal panel and arranging them in the length direction.

  In the liquid crystal display device, the first light emitting module body has a first wiring board having a predetermined size, and n light emitting diodes mounted on the main surface of the first wiring board arranged in the same axis. The first wiring board is mounted on the first main surface and is formed in a predetermined size with a heat conductive metal material, and the heat pipe fitting portion is formed over the entire length direction on the second main surface side. A first heat pipe having a predetermined length in which heat generated from each light emitting diode is transmitted through the first heat radiating plate by being fitted to the heat radiating plate and the heat pipe fitting portion of the first heat radiating plate. It consists of. In the liquid crystal display device, the second light-emitting module body is arranged on the same axis line on the main surface of the second wiring board, the second wiring board having substantially the same width as the first wiring board and slightly short length. The m (m <n) light-emitting diodes mounted in this manner and a thermally conductive metal material are formed to be approximately the same size as the second wiring board, and the second wiring board is mounted on the first main surface and the second A second heat radiating plate having a heat pipe fitting portion formed over the entire length direction on the main surface side, and heat generated from each light emitting diode by being fitted to the heat pipe fitting portion of the second heat radiating plate Is constituted by a second heat pipe having a predetermined length transmitted through the second heat radiating plate.

  In a liquid crystal display device, large-capacity illumination light emitted from a large number of light emitting diodes in a backlight unit is supplied to a transmissive liquid crystal panel via a light guide block unit and an optical function sheet block unit, and has high luminance. Will be displayed. In the liquid crystal display device, the optical function is achieved in a state where the light guide block portion is formed with a slight thickness by, for example, milky white light guide resin material and is averaged from the whole surface by diffusing the incident illumination light inside. From the light emitting diode directly below by forming a light guide plate to be supplied to the sheet block portion and a dimming portion which is formed of a transparent resin material and has a light reflection diffusivity at a portion facing each light emitting diode A light diffusion plate that regulates an incident amount of emitted light to suppress generation of a partial high luminance region and supplies illumination light with uniform luminance from the entire surface to the diffusion light guide plate.

  In the liquid crystal display device, the optical function sheet block unit has a plurality of functional optics each having a polarization function for orthogonal components, a function for correcting a phase difference to achieve a wide-angle field of view, a function for preventing coloring, a diffusion function, etc. A sheet is laminated. In the liquid crystal display device, the optical function sheet block unit performs a predetermined light conversion process on the illumination light incident from the light guide block unit and supplies the illumination light to the transmissive liquid crystal panel in a stable state.

  In a liquid crystal display device, each light emission is performed by a heat radiating plate and a heat pipe fitted in a heat pipe fitting portion formed over the entire length direction of the heat radiating plate so as to be in close contact with the inner wall. Heat generated from a large number of light emitting diodes in the module body is efficiently dissipated. In the liquid crystal display device, heat conduction is performed more efficiently by performing heat conduction from a heat radiating plate or a heat pipe to a heat radiating means such as a heat sink appropriately disposed. In the liquid crystal display device, the heat generated from the light emitting diodes in the light guide space portion formed between the transmissive liquid crystal panel and the backlight portion is suppressed from becoming hot.

  According to the liquid crystal display device according to the present invention, two types of light emitting module bodies, a first light emitting module body having n light emitting diodes and a second light emitting module body having m light emitting diodes, are used and transmitted. Each light emitting array is configured by selecting and combining a predetermined number of first light emitting module bodies and second light emitting module bodies in accordance with the size of the liquid crystal panel. Therefore, according to the liquid crystal display device according to the present invention, the light emitting module body constituting the backlight unit is modularized so that the heat radiation plate, the heat pipe, and the wiring board can be shared even if the screen size is different. Can be reused. According to the liquid crystal display device of the present invention, it is possible to reduce the material cost and the assembly cost and to improve the productivity even when the number of products is increased.

  Hereinafter, a transmissive liquid crystal color display device (hereinafter abbreviated as a liquid crystal display device 1) 1 shown as an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the liquid crystal display device 1 includes a liquid crystal panel 2 having a predetermined screen size, and a predetermined number of red, green, and blue LEDs 4 respectively, and a back side of the liquid crystal panel 2. And a backlight unit 3 that supplies a large amount of illumination light, and constitutes a television receiver or a display monitor device that performs high-luminance display. As will be described in detail later, the liquid crystal display device 1 is modularized in the backlight unit 3. For example, the liquid crystal panel 2 having a screen size of 32 inches, 40 inches, or 46 inches uses components. It is turned.

  The liquid crystal display device 1 is an optical function sheet block that performs predetermined optical conversion processing on illumination light emitted from the backlight unit 3 between the liquid crystal panel 2 and the backlight unit 3 and supplies the illumination light to the liquid crystal panel 2 5 and a light guide block unit 6 that supplies illumination light in a state of uniform brightness to the liquid crystal panel 2. The liquid crystal display device 1 radiates heat generated from each LED 4 to the backlight unit 3 and a reflection unit 7 that reflects the illumination light emitted from each LED 4 toward the outer peripheral direction toward the light guide block unit 5. And a heat dissipating part 8 are provided.

  As the liquid crystal display device 1, the liquid crystal panel 2 having the above-described screen sizes is selected and used. As shown in FIG. 2, the outer peripheral edge of the liquid crystal panel 2 has a frame-shaped front frame member 9 and a holder. It is sandwiched and held by the member 10 via the spacer 11, the guide member 12, and the like. The liquid crystal display device 1 constitutes a so-called chassis member in which constituent members are assembled with a holder member 10 and a back panel 13 whose details will be described later, and is fixed to a mounting portion of a casing (not shown). The liquid crystal display device 1 is combined with a cover glass on the front side of the liquid crystal panel 2 (not shown).

  Although not described in detail, the liquid crystal panel 2 encloses a liquid crystal between a first glass substrate and a second glass substrate, which are held at a distance from each other by spacer beads, and applies a voltage to the liquid crystal. Change the light transmittance by changing the direction of the molecule. In the liquid crystal panel 2, a striped transparent electrode, an insulating film, and an alignment film are formed on the inner surface of the first glass substrate. In the liquid crystal panel 2, a color filter of three primary colors, an overcoat layer, a striped transparent electrode, and an alignment film are formed on the inner surface of the second glass substrate.

  In the liquid crystal panel 2, a deflection film and a retardation film are bonded to the surfaces of the first glass substrate and the second glass substrate, respectively. In the liquid crystal panel 2, an alignment film made of polyimide has liquid crystal molecules aligned in the horizontal direction at the interface, and the deflection film and the retardation film achromatic and whiten the wavelength characteristics to achieve full color using a color filter. Etc. are displayed in color. Note that the liquid crystal panel 2 is not limited to such a structure, and may be a liquid crystal panel having various configurations conventionally provided.

  In the liquid crystal display device 1, the back panel 13 is formed into a member having a size slightly larger than the outer shape of the liquid crystal panel 2, for example, by an aluminum material that is relatively light and has mechanical rigidity. The back panel 13 itself has thermal conductivity, and thus has a function of radiating heat generated from a large number of LEDs 4 and circuit components. As described above, the back panel 13 is formed with the outer peripheral wall portion that combines the front frame member 9 and the holder member 10 at the outer peripheral portion, and the attachment portion 29 for attaching the optical stud member 24 described later and the first heat radiating plate 43. Alternatively, an attachment portion (not shown) for attaching the second heat radiating plate 52 or a drawer opening and a hooking portion for drawing out the lead wire are formed.

  As shown in FIG. 2, the liquid crystal display device 1 includes a light guide space portion 14 that is optically sealed by the backlight portion 3 facing the entire surface of the liquid crystal panel 2 as described above. And combined with the back panel 13. In the backlight unit 3, a first light emitting module body 15 and a second light emitting module body 16, which will be described in detail later according to the screen size of the liquid crystal panel 2, are combined in an appropriate number to form a light emitting array 17. . In the backlight unit 3, a plurality of light emitting arrays 17 are arranged in parallel at a predetermined interval to form an area light type backlight unit.

  In the liquid crystal display device 1, as shown in FIG. 3, a pair of heat sinks 18 and 18 that receive heat conduction from the heat radiating portion 8 are positioned on both sides in the length direction on the back surface of the back panel 13 as will be described in detail later. Has been placed. The heat sinks 18 and 18 are used alone or in combination with a cooling fan or a heat pipe as a heat radiating member such as a power supply unit in various electronic devices or the like, and a large number of fins are integrated by an aluminum material having excellent thermal conductivity. Formed. The heat sinks 18 and 18 cool the liquid crystal display device 1 by having a large surface area, receiving heat conduction from the heat radiating portion 8 side, and radiating heat from the surface of each fin.

  The larger the heat sinks 18 and 18, the greater the heat dissipation effect, but the larger the thickness of the backlight unit 3 and the entire apparatus. Since the heat sinks 18 and 18 are large and heavy components, for example, when directly attached to a wiring board or the like, the heat sinks 18 and 18 are interposed between a mounting bracket member that maintains insulation from circuit components and wiring patterns, or a high-temperature part. A heat conducting member or the like is required and the structure is complicated. The liquid crystal display device 1 suppresses an increase in size and efficiently radiates heat generated from each LED 4 by the configuration of the backlight unit 3 described later and the configuration in which the heat sinks 18 and 18 are skillfully arranged on the back panel 13. Configured to be In the liquid crystal display device 1, as will be described later, the back panel 13 is formed in a flat shape as a whole, so that a flat portion is formed in the central region between the heat sinks 18 and 18.

  As shown in FIG. 3, the liquid crystal display device 1 controls a liquid crystal controller 19 that outputs a signal for controlling its operation to the liquid crystal panel 2 in the central region of the back panel 13, and the liquid crystal panel 2 and the power supply unit. The mounting of control circuit packages such as LED control circuit units 21 and 21 for controlling the operation of the plurality of power supply control units 20 and 20 or the backlight unit 3 suppresses an increase in thickness. The liquid crystal display device 1 is appropriately combined with a cooling fan (not shown) that promotes the heat dissipation operation of each heat sink 18, 18.

  In the liquid crystal display device 1, large-capacity illumination light emitted from the backlight unit 3 is supplied to the liquid crystal panel 2 through the optical function sheet block unit 5. The optical function sheet block portion 5 is formed by laminating a plurality of optical function sheets each having an outer shape substantially equal to the outer shape of the liquid crystal panel 2. Although not described in detail, the optical function sheet block unit 5 is an optical function sheet that decomposes the illumination light supplied from the backlight unit 3 into orthogonal polarization components, and compensates for the phase difference of the illumination light, thereby widening the viewing angle and coloring. It has a plurality of optical function sheets that exhibit various optical functions, such as an optical function sheet for prevention or an optical function sheet that diffuses illumination light. The optical function sheet block unit 5 is not limited to the above-described optical function sheet. For example, an optical function such as a brightness enhancement film for improving the brightness, two upper and lower diffusion sheets sandwiching the retardation film or the prism sheet, and the like. A sheet may be provided.

  In the liquid crystal display device 1, the light guide block unit 6 guides the light in the light guide space 14 in a state where the illumination light emitted from the backlight unit 3 has a uniform luminance over the entire surface, and the optical function sheet. The light enters the block unit 5. The light guide block portion 6 is composed of a diffusion light guide plate 22 and a diffusion plate 23, and a predetermined facing interval is maintained in the light guide space portion 14 by a plurality of optical stud members 24 as will be described in detail later. Be placed.

  The diffusing light guide plate 22 is made of a plate body that is substantially the same size and slightly thick as the liquid crystal panel 2 formed from a milky white synthetic resin material having light guiding properties, such as an acrylic resin or a polycarbonate resin. As shown in FIG. 2, the diffusion light guide plate 22 has the optical function sheet block portion 5 combined in a laminated state on one main surface, and the outer peripheral portion is held by a bracket member 25. The diffusion light guide plate 22 diffuses the illumination light incident from the other main surface by appropriately refracting and irregularly reflecting inside, and in a state where the luminance is uniform over the entire surface from the one main surface side. Incident light enters the block unit 5.

  The diffusion plate 23 is formed of a plate body having substantially the same size as the liquid crystal panel 2 formed of a transparent synthetic resin material such as acrylic resin, and is disposed to face the backlight unit 3 with a predetermined interval. Thereby, it has a function which controls the incident state of the illumination light radiate | emitted from each LED4. As shown in FIG. 2, a light control pattern 26 is formed on the diffusion plate 23 at a portion facing each LED 4.

  Each dimming pattern 26 has a slightly larger diameter than the outer diameter of the LED 4 by, for example, a screen printing method using an ink having light reflection / diffusion characteristics prepared by mixing an ink material containing a light shielding agent and a diffusing agent at a predetermined ratio. It is formed by printing a circular pattern. Examples of the light-shielding agent include titanium oxide, barium sulfide, calcium carbonate, alumina oxide, zinc oxide, nickel oxide, calcium hydroxide, lithium sulfide, iron trioxide, methacrylic resin powder, mica (sericite), porcelain clay powder, kaolin Bentonite, gold powder, pulp fiber or the like is used. Examples of the diffusing agent include silicon oxide, glass beads, glass fine powder, glass fiber, liquid silicon, crystal powder, gold plating resin beads, cholesteric liquid crystal liquid, recrystallized acrylic resin powder, and the like.

  The diffusing plate 23 reflects the illumination light emitted directly above the LED 4 in which each dimming pattern 26 is disposed immediately below, and causes the illumination light to be incident on a region where each dimming pattern 26 is not formed. In this way, the diffusion plate 23 reduces the occurrence of a partial high-luminance region by regulating the incident state of the illumination light emitted from each LED 4 by each dimming pattern 26, and from the entire surface to the diffusion light guide plate 22. In contrast, illumination light with uniform brightness is supplied.

  The diffusing plate 23 is configured by a large number of dots formed in the area having a diameter larger than the outer diameter of the LED 4 for each dimming pattern 26, and transmits a part of the illumination light and reflects and diffuses a part thereof. Therefore, the incident light quantity may be limited. In this case, the diffusing plate 23 is formed so that each dimming pattern 26 has a dot density that is denser in the center than in the periphery, thereby limiting the amount of incident light at the center and shifting the position of the LED 4 from the position. You may comprise as what is called a gradation pattern to absorb.

  In the liquid crystal display device 1, a part of the illumination light emitted from each LED 4 and incident on the diffusion plate 23 beyond the critical angle is reflected by the surface of the diffusion plate 23. In the liquid crystal display device 1, the emitted light emitted from each LED 4 of the backlight unit 3 to the surroundings, the emitted light reflected from the surface of the diffusion plate 23, or the illumination light reflected by each dimming pattern 26 is reflected. The light is reflected by the unit 7 and efficiently supplied to the diffusion light guide plate 22 through the diffusion plate 23. In the liquid crystal display device 1, the illumination light is repeatedly reflected between the reflecting portion 7 and the diffusing plate 23 so that the reflectance is improved by the principle of increased reflection.

  The reflecting portion 6 is made of, for example, an aluminum plate as a base material and a reflecting material made of foaming PET or the like containing a fluorescent agent is bonded to the surface of the reflecting portion 6, and the reflecting plate 27 is formed in an outer shape substantially equivalent to the liquid crystal panel 2. Have As shown in FIG. 2, a large number of guide holes 28 that penetrate each LED 4 are formed in the reflection plate 27, and the illumination light emitted from each LED 4 toward the outer peripheral portion and the dimming pattern 26 described above. The reflected illumination light is reflected toward the diffusion plate 23 side.

  In the liquid crystal display device 1, the diffusion light guide plate 22, the diffusion plate 23, and the reflection plate 27 described above are positioned with respect to each other and between the opposing main surfaces in order to prevent the occurrence of color unevenness in the liquid crystal panel 2. The parallelism is accurately maintained over the entire surface. In the liquid crystal display device 1, these plates 22, 23 and 27 are held by a large number of optical stud members 24 attached to the back panel 13 as will be described in detail later. As will be described in detail later, each optical stud member 24 is integrally formed of a milky white synthetic resin material having light guiding properties, mechanical rigidity, and a certain degree of elasticity, such as a polycarbonate resin, and as shown in FIG. 13 is attached to each of the attachment portions 29 formed in FIG.

  The attachment portion 29 is formed of a substantially trapezoidal convex portion formed on the inner surface side of the back panel 13 and positioned between the rows of the light emitting arrays 17 in a state where the backlight portion 3 is combined. The mounting portion 29 has an upper surface that constitutes the mounting surface of the reflection plate 27, and is provided with through-holes 30 for mounting the optical stud members 24.

  As shown in FIG. 2, each optical stud member 24 has a shaft-shaped base portion 31, a fitting portion 32 formed at the lower end portion of the shaft-shaped base portion 31, and a predetermined interval from the fitting portion 32. The flange-shaped first receiving plate portion 33 integrally formed around the circumference of the shaft-like base portion 31 and the circumference of the shaft-like base portion 31 with a predetermined distance from the first receiving plate portion 33. And a flange-shaped second receiving plate portion 34 formed in the above. Each optical stud member 24 is formed with an axial length in which the shaft-like base portion 31 defines the facing distance between the mounting portion 29 of the back panel 13 and the diffusion light guide plate 22, and extends from the second receiving plate portion 34 to the diffusion plate. A step portion 35 is formed at a height position substantially equal to the thickness of 23.

  Each optical stud member 24 is formed to have a long conical shape in which the shaft-like base portion 31 gradually decreases in diameter toward the upper end portion, and the upper end portion 36 constitutes an abutting portion that abuts against the diffusion light guide plate 22. To do. Each of the optical stud members 24 is formed with an axial stealing hole 37 located slightly above the stepped portion 35, and converging habits are imparted to the shaft-like base portion 31 at this formation site. In each optical stud member 24, the fitting portion 32 has the outer diameter of the tip end portion substantially equal to the outer diameter of the mounting hole 30 on the back panel 13 side, and gradually from the inner diameter of the mounting hole 29 in the axial direction. A cross section having a large diameter is formed in a substantially truncated cone shape. Each optical stud member 24 is provided with converging habits by forming a slit in the fitting portion 32 from the large-diameter portion toward the distal end side.

  A large number of fitting holes 38 are formed in the diffusion plate 23 described above so as to face the mounting portions 29 of the back panel 13. In addition, a large number of fitting holes 39 are also formed in the reflection plate 27 so as to face the mounting portions 29 of the back panel 13. The reflection plate 27 is assembled on each attachment portion 29 of the back panel 13 with each fitting hole 39 aligned with the attachment hole 30. Each optical stud member 24 is attached to the back panel 13 by the fitting portion 32 being pushed into the attachment hole 30 through the fitting hole 39 opposed to the reflection plate 27 in this state. As shown in FIG. 2, each optical stud member 24 presses the reflection plate 27 onto the attachment portion 29 by the first receiving plate portion 33 and fixes the reflection plate 27 to the back panel 13.

  Each optical stud member 24 is combined with a diffusion plate 23 so that a fitting hole 38 facing the upper end portion 36 is fitted. Each optical stud member 24 is converged at the site where the meat stealing hole 37 is formed as the diffusion plate 23 is pushed, and returns to a natural state when the fitting hole 38 passes through the step 35. The diffusion plate 23 is held by being sandwiched between the second receiving plate portion 34 and the step portion 35. Each optical stud member 24 is configured to combine the reflection plate 27 held by the first receiving plate portion 33 and the diffusion plate 23 held by the second receiving plate portion 34 with the back panel 13 while maintaining the facing distance. Each optical stud member 24 is opposed to the diffusion plate 23 and the reflection plate 27 with respect to the diffusion light guide plate 22 by abutting the upper end portion 36 against the diffusion light guide plate 22 combined with the back panel 13. Hold the interval.

  In the liquid crystal display device 1, as described above, each optical stud member 24 is assembled on the attachment portion 29 of the back panel 13 by a simple method of pushing the fitting portion 32 into the attachment hole 30. In the liquid crystal display device 1, as described above, the diffusion light guide plate 22, the diffusion plate 23, and the reflection plate 26 are positioned via the optical stud members 24, and the diffusion plate 23 and the reflection plate 27 are mutually connected. The facing distance is kept precisely. In the liquid crystal display device 1, the illumination light emitted from the backlight unit 3 performs operations such as light guide, diffusion, and reflection in a stable state on each of the plates 22, 23, and 27, thereby causing uneven color in the liquid crystal panel 2. Occurrence is prevented. The optical stud member 24 is attached to the back panel 13 in an appropriate number depending on the screen size of the liquid crystal panel 2, but is basically used as a common component for any liquid crystal panel 2. .

  In the liquid crystal display device 1, each of the diffusion plate 23 and the reflection plate 27 on which the light control pattern 26 is formed has front and back characteristics, and must be combined without mistake. In the liquid crystal display device 1, at least one of the mounting hole 30 of the mounting portion 29 formed in the back panel 13, the fitting hole 38 of the diffusion plate 23, and the fitting hole 39 of the reflection plate 27 is shifted in position. Formed. In the liquid crystal display device 1, when the diffusing plate 23 or the reflecting plate 27 is combined with the front and back being mistaken, the combination with the optical stud member 24 is disabled, and an erroneous combination preventing structure is configured.

  In the liquid crystal display device 1, the light emitting array 17 is configured by selecting the number of combinations of the first light emitting module body 15 and the second light emitting module body 16 according to the screen size of the liquid crystal panel 2 as described above. The first light emitting module body 15 and the second light emitting module body 16 are different in the number of LEDs 4 to be mounted and the size of the constituent members as will be described later, but have the same basic structure. The first light emitting module body 15 and the second light emitting module body 16 constitute the heat radiating section 8 together with the backlight section 3.

  In the liquid crystal display device 1, heat generated from a large number of LEDs 4 reaches a high temperature state in the light guide space portion 14 that is formed between the liquid crystal panel 2 and the backlight portion 3 and has a sealed periphery. In the liquid crystal display device 1, the characteristics of the optical function sheet block unit 5 described above change due to an increase in temperature, or distortion or the like occurs in the diffusion light guide plate 22, the diffusion plate 23, or the reflection plate 27, causing uneven color in the liquid crystal panel 2. Etc., and the operation of each circuit unit 19, 20, 21 is made unstable. In the liquid crystal display device 1, the heat generated from each LED 4 is efficiently radiated by the heat radiating unit 8 so that a stable operation is performed.

  As shown in FIG. 4, the first light emitting module body 15 is composed of a total of 25 first wiring boards 40 and appropriate combinations of red LEDs, green LEDs, and blue LEDs, and is mounted on the first wiring board 40. The LED 4, the input connector 41 and the output connector 42 mounted on the first wiring board 40, and the backlight unit 3 is configured by these members. The first light emitting module 15 includes a first heat radiating plate 43 that supports the first wiring board 40 and a first heat pipe 44 combined with the first heat radiating plate 43, and the heat radiating portion 8 is configured by these members. To do.

  Although not described in detail, each LED 4 has a light emitting bulb held by a resin holder and a pair of terminals projecting from the resin holder. For each LED 4, a so-called side emission type LED having directivity for emitting the main component of the emitted light in the outer peripheral direction of the light emitting bulb is used.

  The first wiring board 40 has a horizontally long rectangle having a predetermined length and width, and although not shown, a wiring pattern for connecting the LEDs 4 in series, lands for connecting the terminals, and the like are formed. . On the first wiring board 40, 25 LEDs 4 are mounted on the same axis line and arranged in the longitudinal direction at equal intervals. An input connector 41 is mounted on the first wiring board 40 in the vicinity of one side in the width direction and on one side, and an output connector 42 is mounted on the other side.

  The first heat radiating plate 43 is made of an aluminum material that has excellent thermal conductivity, good workability, is light and inexpensive, and has approximately the same length and slightly larger width as the first wiring board 40 described above by extrusion. It is formed in a rectangular block shape. The first heat radiating plate 43 serves as a mounting member for the first wiring board 40 together with the heat radiating member, so that the first heat radiating plate 43 is formed with a predetermined thickness having mechanical rigidity. The first heat radiating plate 43 is not limited to an aluminum material, and may be formed of, for example, an aluminum alloy material, a magnesium alloy material, a silver alloy material, a copper material, or the like having equal or higher characteristics. It may be formed by an appropriate processing method such as press processing or cutting processing.

  As shown in FIG. 4, the first heat dissipating plate 43 is formed with a board fitting recess 45 for fitting the first wiring board 40 to the first main surface 43a over the entire length. The first heat dissipating plate 43 has a board fitting recess 45 that is substantially the same width as the first wiring board 40 and has a height that is slightly larger than the thickness of the first wiring board. The bottom surface of 40 and both side edges in the width direction are held. The first heat radiating plate 43 fixes the first wiring board 40 fitted in the board fitting recess 45 with a plurality of mounting screws 46.

  The first heat dissipating plate 43 has a receiving projection 47 in the length direction to which the bottom surface of the first wiring board 40 is closely attached by leaving the central region in the width direction as a convex portion having a predetermined width in the board fitting recess 45. While being formed, meat stealing recesses 48 are formed along the both sides of the receiving projection 47 over the entire length in the length direction. In the first heat radiation plate 43, the receiving projection 47 is formed with a width corresponding to the LED mounting area for mounting each LED 4 of the first wiring board 40 as shown in FIG. Heat is efficiently transmitted from the LED mounting region that becomes the hottest by the operation so that heat is radiated. In addition, although the 1st heat radiating plate 43 formed the meat stealing recessed parts 48 and 48 in order to maintain weight reduction and a dimensional accuracy, you may make these these meat stealing recessed parts 48 and 48 also comprise as a heat pipe fitting part. Good.

  The first heat radiating plate 43 is attached to a heat pipe fitting recess 49 in which the first heat pipe 44 is fitted on the second main surface 43b side facing the first main surface 43a, or to the back panel 13 (not shown). A plurality of mounting studs and positioning dowels constituting the part are integrally formed. The heat pipe fitting recess 49 is a cross-section that is located at a substantially central portion in the width direction and opens over the entire length direction on the second main surface 43b facing the receiving projection 47 on the first main surface 43a side. Consists of a substantially arch-shaped groove. The heat pipe fitting concave portion 49 has an opening width substantially equal to the outer diameter of the first heat pipe 44, and caulking convex edges 50 are integrally formed at the opening portion over the entire length.

  A first heat pipe 44 is assembled to the first heat radiating plate 43 in a heat pipe fitting recess 49. The first heat radiating plate 43 is subjected to a caulking process so as to close the caulking convex edges 50 and 50 after the first heat pipe 44 is fitted therein from the opening of the heat pipe fitting concave portion 49. As a result, the first heat pipe 44 is assembled in a state where the outer peripheral portion is in close contact with the inner wall of the heat pipe fitting recess 49. The first heat dissipating plate 43 can efficiently conduct heat generated from the LED 4 by assembling the first heat pipe 44 over the entire length at a portion facing the mounting region of the LED 4.

  The first heat radiating plate 43 also serves as a holding member for the first heat pipe 44 by assembling the first heat pipe 44 in the heat pipe fitting recess 49. The first heat radiating plate 43 simplifies the structure of the heat radiating portion 8, simplifies the handling of the first heat pipe 44 with precision during assembly, and prevents the occurrence of bending or breakage. Since the first heat radiating plate 43 positions each LED 4 and the first heat pipe 44 and combines them in an approaching state, efficient heat is generated between each LED 4 and the first heat pipe 44. Constructs a conduction path.

  In addition, although the 1st heat radiating plate 43 formed the heat pipe fitting recessed part 49 opened to the 2nd main surface 43b and assembled the 1st heat pipe 44, it is not limited to this structure. In the first heat radiating plate 43, for example, a heat pipe fitting hole that opens at at least one end in the longitudinal direction is formed, and the first heat pipe 44 is inserted into the heat pipe fitting hole from the side direction. May be assembled.

  A heat pipe is a heat conduction member that is generally used to conduct heat from a high-temperature part such as a power supply unit or a light source unit to a heat radiating means such as a heat sink in various electronic devices, and has excellent heat conductivity. It is configured by sealing a conductive medium such as water that is vaporized at a predetermined temperature in a state where the inside of a metal pipe material such as copper is evacuated, and has a highly efficient heat conduction capability. As described above, the first heat pipe 44 is integrally assembled with the first heat radiating plate 43, and an end portion thereof is connected to the heat sink 18 together with the first heat radiating plate 43. The first heat pipe 44 receives heat conduction from the first heat radiating plate 43 on the high temperature side, and the conductive medium sealed inside vaporizes from liquid to gas. In the first heat pipe 44, the vaporized conductive medium flows through the pipe to the connection portion with the low-temperature heat sink 18 to be cooled, thereby releasing condensation heat and liquefying. In the first heat pipe 44, the liquefied conductive medium moves to the first heat radiation plate 43 side by capillary action in a plurality of longitudinal grooves or porous layers formed on the inner wall of the metal pipe. As a result of this circulation, a highly efficient heat conduction effect is achieved.

  The second light emitting module body 16 has the same basic configuration as the first light emitting module body 15 described above, but the second wiring board 51, the second heat dissipating plate 52, which differ only in length, And a second heat pipe 53. As shown in FIG. 5, a total of 15 LEDs 4 in which a red LED, a green LED, and a blue LED are appropriately combined are mounted on the second light emitting module body 16 as shown in FIG. 5. Description of the second light emitting module body 16 is omitted by assigning the same reference numerals to the corresponding members since the other components except the above-described members are equivalent to the first light emitting module body 15.

  As described above, the second light emitting module body 16 is formed to have substantially the same width as the second wiring board 51 with a different length from the first wiring board 40 on the first light emitting module body 15 side. The second light emitting module body 16 has a total of 15 LEDs 4 mounted on the main surface thereof on the same axis line with an equal interval substantially equal to the mounting interval of the LEDs 4 on the first light emitting module body 15 side. It becomes. That is, the second light emitting module body 16 is formed so that the second wiring board 51 is shorter than the first wiring board 40 of the first light emitting module body 15 by the number of LEDs 4 to be mounted. The second light emitting module body 16 is also mounted by connecting the LEDs 4 in series on the second wiring board 51.

  In the second light emitting module body 16, the second heat radiating plate 52 is also substantially the same width as the first heat radiating plate 43 on the first light emitting module body 15 side, and the second light emitting module body 16 is short in length by the number of LEDs 4 to be mounted. The wiring board 51 is formed to have substantially the same length. The second light emitting module body 16 includes a second heat pipe 53 having substantially the same length as the second heat radiating plate 52.

  In the liquid crystal display device 1, the first light emitting module body 15 and the second light emitting module body 16 configured as described above connect the first heat radiating plate 43 and the second heat radiating plate 52 in the length direction as will be described later. The light emitting array 17 is configured by combining the two. In the liquid crystal display device 1, the first light-emitting module body 15 and the second light-emitting module body 16 are heated with the respective board fitting recesses 45 and 45 formed in the first heat radiating plate 43 and the second heat radiating plate 52. Since the pipe fitting recesses 49 and 49 are positioned on the same axis, the first wiring board 40, the second wiring board 51, the first heat pipe 44, and the second heat pipe 53 are opposed to the opposite ends. Combined and combined.

  In the liquid crystal display device 1, the light emitting array 17 having different axial lengths is configured by changing the number of combinations of the first light emitting module body 15 and the second light emitting module body 16. In the liquid crystal display device 1, the plurality of light emitting arrays 17 are arranged on the inner surface of the back panel 13 in parallel with a predetermined interval in accordance with the size of the liquid crystal panel 2, whereby the backlight unit 3 and the heat radiating unit 8. And configure.

  The liquid crystal display device 60 shown in FIG. 6 includes the liquid crystal panel 2 having a screen size of 32 inches, and each light emitting array 61 is configured by arranging the two first light emitting module bodies 15A and 15B described above in the length direction. In addition, the backlight unit 63 is configured by arranging four rows of light emitting arrays 61A to 61D in parallel with each other with respect to the back panel 62 having an outer shape corresponding to the liquid crystal panel 2. The liquid crystal display device 60 includes eight first light emitting module bodies 15 each having 25 LEDs 4 mounted thereon, so that 2 × 25 = 50 in the horizontal direction and four in the vertical direction, for a total of 4 × 50 = 200. The backlight part 63 provided with the LED4 is comprised.

  In the liquid crystal display device 60, each light-emitting array 61 has one side edge on the side where the first light-emitting module bodies 15A and 15B are mounted on the first wiring boards 40 and 40 on which the input connector 41 and the output connector 42 are mounted. They are arranged in the length direction so as to match. In the liquid crystal display device 60, the light emitting array 61A in the first row and the light emitting array 61B in the second row face each other on one side edge on which the input connector 41 and the output connector 42 are mounted. The light emitting array 61C in the third row and the light emitting array 61D in the fourth row are arranged with the one side edges on the side where the input connector 41 and the output connector 42 are mounted facing each other.

  In the liquid crystal display device 60, in each light emitting array 61, the first light emitting module bodies 15A and 15B are connected in series by a lead wire with a connector (not shown). As described above, the input connector 41 and the output connector 42 are connected to each other. By making them face each other, the shortest wiring is performed. In the liquid crystal display device 60, the input connector 41 is located on the right side of the first light emitting module body 15B in which the odd-numbered light emitting arrays 61A and 61C are arranged on the right side in the drawing, and the first light emitting element arranged on the left side. The output connector 42 is positioned on the left end side of the module body 15A.

  In the liquid crystal display device 60, lead wires are routed using the space in the length direction formed between the odd and even columns of the light emitting arrays 61A to 61D, and the details of these lead wires are omitted. Is led to the back side through a drawer opening formed in the back panel 62 and connected to the LED control circuit unit 21 and the like described above. In the liquid crystal display device 60, the efficiency of the space and the simplification of the wiring process can be achieved by holding and guiding the lead wires using the space formed between the light emitting arrays 61A to 61D. In the liquid crystal display device 60, the position of the input connector 41 and the output connector 42 mounted on the first wiring board 40 identifies the wrong combination of the first light emitting module bodies 15A and 15B in the same row and between rows. Become so.

  In the liquid crystal display device 60, the first heat pipes 44 and 44 of the first light emitting module bodies 15A and 15B arranged in the length direction in each light emitting array 61 are connected at the abutting portion. In the liquid crystal display device 60, both ends of the connected first heat pipes 44, 44 are connected to the opposing heat sinks 18, 18, so that the heat generated from each LED 4 is transferred to the first heat dissipation plate 43 and the first heat. Conducted to the heat sinks 18 and 18 through the pipes 44 and 44, efficient heat dissipation is performed. In the liquid crystal display device 60, the optical stud member 24 described above is appropriately disposed in a space in the length direction formed between the odd and even columns of the light emitting arrays 61A to 61D.

  The liquid crystal display device 70 shown in FIG. 7 includes the liquid crystal panel 2 having a screen size of 40 inches, and includes the two first light emitting module bodies 15A and 15B and one second light emitting module body 16 described above. The light emitting arrays 71 are arranged side by side in the vertical direction, and the backlight unit 73 is configured by arranging five rows of light emitting arrays 71A to 71E in parallel with each other on the back panel 72 having an outer shape corresponding to the liquid crystal panel 2. It becomes. The liquid crystal display device 70 includes 10 first light emitting module bodies 15 and three second light emitting module bodies 16, thereby 2 × 25 + 15 = 65 in the horizontal direction and 5 in the vertical direction, for a total of 5 × 65. = The backlight part 73 provided with 325 LED4 is comprised.

  Also in the liquid crystal display device 70, each light emitting array 71 includes the first light emitting module bodies 15A and 15B and the second light emitting module body 16 respectively, and the first wiring boards 40 and 40 and the second wiring board 51 respectively for input. The connector 41 and the output connector 42 are arranged in the length direction so that one side edge on the side where the connector 41 and the output connector 42 are mounted is aligned. Also in the liquid crystal display device 70, the light emitting array 71A in the first row and the light emitting array 71B in the second row face each other on one side edge on which the input connector 41 and the output connector 42 are mounted. The light emitting array 71C in the third row and the light emitting array 71D in the fourth row are arranged with the one side edges on the side where the input connector 41 and the output connector 42 are mounted facing each other.

  Also in the liquid crystal display device 70, the first heat pipes 44 and 44 of the first light emitting module bodies 15 </ b> A and 15 </ b> B and the second heat pipe 53 of the second light emitting module body 16 arranged in the length direction in each light emitting array 71. Are connected to each other at the butted portion. In the liquid crystal display device 70, one end of the first heat pipe 44 of the first light emitting module body 15A and one end of the second heat pipe 53 of the second light emitting module body 16 are connected to the heat sinks 18 and 18 facing each other. The heat generated from each LED 4 is conducted to the heat sinks 18 and 18 through the first heat radiating plate 43 and the first heat pipes 44 and 44, and the second heat radiating plate 52 and the second heat pipe 53, thereby efficiently radiating heat. Done.

  In the liquid crystal display device 70, the above-described optical stud member 24 is arranged between the light emitting arrays 71A to 71E in a well-balanced manner. In the liquid crystal display device 70, for example, a plurality of optical stud members 24 are arranged at equal intervals between the first row of light emitting arrays 71A and the second row of light emitting arrays 71B. A plurality of optical stud members 24 are also arranged at equal intervals between the light emitting array 71D in the column and the light emitting array 71E in the fifth column.

  The liquid crystal display device 80 shown in FIG. 8 includes the liquid crystal panel 2 having a screen size of 46 inches, and each light emitting array 81 includes the three first light emitting module bodies 15A, 15B, and 15C described above in the length direction. The backlight unit 83 is configured by arranging six rows of light emitting arrays 61 </ b> A to 61 </ b> F in parallel with each other with respect to a back panel 82 having an outer shape corresponding to the liquid crystal panel 2. The liquid crystal display device 80 includes 18 first light emitting module bodies 15 each having 25 LEDs 4 mounted thereon, so that 3 × 25 = 75 in the horizontal direction and 6 in the vertical direction, for a total of 6 × 75 = 450. The backlight part 83 provided with the LED4 is comprised.

  In the liquid crystal display device 80, each light-emitting array 81 has the first light-emitting module bodies 15A, 15B, and 15C mounted on the first wiring boards 40, 40, and 40 on which the input connector 41 and the output connector 42 are mounted. Are arranged in the lengthwise direction so that the one side edges thereof are aligned. In the liquid crystal display device 80, the light emitting array 81A in the first row and the light emitting array 81B in the second row face each other on one side edge on which the input connector 41 and the output connector 42 are mounted. The light emitting array 81C in the third row and the light emitting array 81D in the fourth row are arranged with the one side edge on the side where the input connector 41 and the output connector 42 are mounted facing each other, The light emitting array 81E in the fifth column and the light emitting array 81F in the sixth column are arranged so that one side edges on the side where the input connector 41 and the output connector 42 are mounted are opposed to each other.

  Also in the liquid crystal display device 80, the respective end portions of the first heat pipes 44, 44, 44 of the first light emitting module bodies 15A, 15B, 15C arranged in the length direction in the respective light emitting arrays 81 face each other. Connected to each other. In the liquid crystal display device 80, the heat sinks 18 and 18 in which the end of the first heat pipe 44 of the left first light emitting module body 15A and the end of the first heat pipe 44 of the right first light emitting module body 15C face each other. , The heat generated from each LED 4 is conducted to the heat sinks 18 and 18 through the first heat radiating plate 43 and the first heat pipe 44, so that efficient heat radiation is performed.

  In the liquid crystal display device 80, a plurality of the above-described optical stud members 24 are arranged between the light emitting arrays 71 in the odd and even columns. In the liquid crystal display device 80, for example, the position of the optical stud member 24A disposed on the left side is shifted between the light emitting array 81E in the fifth row and the light emitting array 81F in the sixth row, as described above. Further, it is possible to prevent the diffusion plate 23 or the reflection plate 27 from being combined with the wrong side.

  As described above, each of the liquid crystal display devices 60, 70, and 80 includes the liquid crystal panel 2 having a different screen size, but the first light emitting module body 15 and the second light emitting module body 16 that are modularized are appropriately combined. The respective light emitting arrays 61, 71, 81 are configured, and the optical stud member 24 is also shared. Therefore, in each of the liquid crystal display devices 60, 70, 80, the member cost and the assembly cost can be reduced and the productivity can be improved.

  In the liquid crystal display device 1, the number of LEDs 4 mounted is 15 and 25, and the light emitting module is modularized. However, the number is not limited to this. However, in the liquid crystal display device 1, when the number of LEDs 4 is increased and the light emitting module body is modularized, the degree of freedom of combination is limited, and the liquid crystal panel 2 can cope with various screen sizes. It becomes difficult. Further, in the liquid crystal display device 1, the number of LEDs 4 to be mounted is reduced, and the light emitting module body is made smaller, so that the degree of freedom of combination can be improved. The loss of heat transfer also increases at the connection site between the light emitting module bodies.

  As the embodiment, the liquid crystal display devices 60, 70, and 80 including the liquid crystal panel 2 having a screen size of 32 inches, 40 inches, or 46 inches are shown, but these screen sizes indicate central values. Of course, even if there is a difference of about several inches, the above-described combined configuration of the first light emitting module body 15 and the second light emitting module body 16 is adopted as it is.

It is a principal part disassembled perspective view of the liquid crystal display device shown as embodiment. It is a principal part longitudinal cross-sectional view of the liquid crystal display device. It is a perspective view from the back side of the liquid crystal display device. It is a perspective view of a 1st light emitting module body. It is a perspective view of a 2nd light emitting module body. It is a top view of the backlight part of a liquid crystal display device provided with a 32-inch size liquid crystal panel. It is a top view of the backlight part of a liquid crystal display device provided with a 40-inch size liquid crystal panel. It is a top view of the backlight part of a liquid crystal display device provided with a 46-inch size liquid crystal panel.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Liquid crystal display device, 2 Liquid crystal panel, 3 Backlight part, 4 LED (light emitting diode) 5 Optical function sheet | seat block part, 6 Light guide book part, 7 Reflection part, 8 Heat radiation part, 13 Back panel, 14 Light guide space part , 15 1st light emitting module body, 16 2nd light emitting module body, 17 Light emitting array, 22 Diffusion light guide plate, 23 Diffusion plate, 24 Optical stud member, 27 Reflection plate, 40 1st wiring board, 41 Input connector, 42 Connector for output, 43 1st heat dissipation plate, 44 1st heat pipe, 51 2nd wiring board, 52 2nd heat dissipation plate, 53 2nd heat pipe, 60 liquid crystal display device, 61 light emitting array, 70 liquid crystal display device, 71 light emission Array, 80 liquid crystal display, 81 light emitting array

Claims (2)

A transmissive liquid crystal panel and a backlight unit for supplying illumination light from the back side of the transmissive liquid crystal panel, in which a light emitting array in which a plurality of light emitting diodes are arranged on the same axis is provided in a plurality of rows in parallel with each other; An optical function sheet block unit that performs a predetermined light conversion process on the illumination light emitted from the backlight unit and supplies the illumination light to the transmissive liquid crystal panel; and the illumination light emitted from the backlight unit. In a liquid crystal display device comprising a light guide block unit that diffuses and enters the optical function sheet block unit,
A first wiring board having a predetermined size, n light emitting diodes arranged and mounted on the same axis on the main surface of the first wiring board, and a predetermined size by a thermally conductive metal material A first heat dissipating plate formed on the first main surface with the first wiring board attached thereto, and a heat pipe fitting portion formed on the second main surface side over the entire length direction, and the first heat dissipating plate A first light emitting module body comprising a first heat pipe having a predetermined length, which is fitted to the heat pipe fitting portion of the heat pipe and is generated by the light emitting diodes through the first heat radiating plate. When,
A second wiring board having a predetermined length that is substantially the same width as that of the first wiring board, and m (m <n) mounted on the main surface of the second wiring board on the same axis. ) A light emitting diode and a thermally conductive metal material are formed in a size different from that of the first heat radiating plate, and the second wiring board is mounted on the first main surface and the entire area in the length direction on the second main surface side. A second heat radiating plate having a heat pipe fitting portion formed thereon, and a heat that is fitted to the heat pipe fitting portion and generated from each of the light emitting diodes is transmitted through the second heat radiating plate. A second light emitting module body comprising a second heat pipe having a length of
According to the size of the transmissive liquid crystal panel, the light emitting array is configured by combining a predetermined number of the first light emitting module bodies and the second light emitting module bodies in the longitudinal direction. Liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein the first light emitting module body has 25 light emitting diodes, and the second light emitting module body has 15 light emitting diodes.

Images