WO2007148445A1

WO2007148445A1 - Light source holder for display device, illumination device for display device, having the holder, and display device having the holder

Info

Publication number: WO2007148445A1
Application number: PCT/JP2007/050467
Authority: WO
Inventors: Yoshiki Takata
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2006-06-19
Filing date: 2007-01-16
Publication date: 2007-12-27

Abstract

A light source holding device for a display device, where a display device light source is installable and removable and where the holding device is electrically connected to an outer lead (4) of the display device light source while holding the outer lead (4). The holder has a first member (6A) and a second member (6B). When the display device light source is installed in place, a holding section of the first member (6A) and a holding section of the second member (6B) are displaced to hold the outer lead (4) by elastic force, and the first member (6A) and the second member (6B) cross each other, as seen in an axial direction of the outer lead (4), at a position closer to the installation direction (D) than the holding section. The holder has high reliability in electrical connection between the holder and the outer lead of the display device light source.

Description

Specification

Light source holder for display device, illumination device for display device including the same, and display device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a light source holder for a display device that holds an outer lead of the light source for the display device, a lighting device for a display device including the same, and a display device.

Background art

FIG. 5 shows a schematic cross-sectional view of a general cold cathode tube lamp used as a light source for a display device. The cold cathode tube lamp shown in FIG. 5 has internal electrodes 2 and 3 in a glass tube 1. Part of the internal electrodes 2 and 3 penetrates the glass tube 1 and protrudes out of the glass tube 1 and functions as outer leads that are electrode terminals. In the above configuration, the glass tube 1 is hermetically sealed. A fluorescent material is applied to the inner wall of the glass tube 1. Then, in the glass tube 1 which is closed, in general, the whole pressure is 10. 7 X 10 ³ ~5 of the glass tube ^{1. 3 X 10 3 Pa (} = 80 ~ 40Torr) to become as neon And argon are sealed in a ratio of 95: 5 or 80:20, and several mg of mercury is sealed. Xenon may be sealed instead of mercury. When the lamp voltage (internal electrode voltage) reaches the discharge start voltage, the discharge is started, and mercury or xenon generates ultraviolet rays by the discharge, and the generated ultraviolet rays are applied to the inner wall of the glass tube 1 to emit fluorescent light. Make the substance emit light.

[0003] Usually, a harness (also referred to as a lead wire) is connected to the outer lead of the cold-cathode tube lamp, and power is supplied to the cold-cathode tube lamp through the harness and the connector. According to such a configuration, it takes a lot of time to install the cold cathode tube lamp, and the assembly efficiency of the illumination device for the display device using the cold cathode tube lamp is poor, and the effort is also required for removing the cold cathode tube lamp. The replacement efficiency when replacing the cold-cathode tube lamp and the dismantling efficiency when disposing of the lighting device for the display device using the cold-cathode tube lamp were getting worse.

Patent Document 1: JP 2001-43715 A (paragraph 0026)

Disclosure of the invention

Problems to be solved by the invention [0004] In order to solve such a problem, the cold cathode tube lamp can be attached and detached, and is electrically connected to the outer lead while holding the outer lead of the cold cathode tube lamp. Various light source holders for display devices have been proposed. An example of such a light source holder for a display device is shown in FIGS. 6A and 6B and FIGS. 7A and 7B. 6A and 6B show a state where the cold cathode tube lamp is not attached to the light source holder for the display device, and FIGS. 7A and 7B show that the cold cathode tube lamp is attached to the light source holder for the display device. It shows the state. 6A and 7A are partial front views, and FIGS. 6B and 7B are side views of the outer leads as viewed from the axial direction.

[0005] The light source holder 5 for the display device has a first member 5A and a second member 5B which are elastic metal members (for example, panel steel), and the natural length L of the sandwiching portion is the cold cathode tube lamp. The outer lead 4 is set slightly smaller than the diameter Φ (usually less than lmm) (see Fig. 6B). By attaching the outer lead 4 of the cold cathode tube lamp to the light source holder 5 for the display device, the length of the clamping part is expanded by Φ-L, and the first member 5A and the second member 5B are elastically deformed. Therefore, the force of the first member 5A and the second member 5B exerts contact pressure on the outer lead 4 of the cold cathode tube lamp, and the first member 5A and the second member 5B become the outer lead 4 of the cold cathode tube lamp. (See Figure 7B).

[0006] While holding the force, the holding portion of the light source holder 5 for the display device is displaced only within the range of the diameter Φ of the outer lead 4 of the cold cathode tube lamp, so the first member 5A and the second member 5B could not obtain a sufficient elastic force, and the contact pressure against the outer lead 4 of the cold cathode tube lamp could not be secured sufficiently. In addition, since the clamping part of the light source holder 5 for the display device is displaced only within the range of the diameter Φ of the outer lead 4 of the cold-cathode tube lamp, the margin for the change in the diameter of the outer lead 4 of the cold-cathode tube lamp is small. I got it.

For this reason, there is a problem that the reliability of the electrical connection between the light source holder 5 for display device and the outer lead 4 of the cold cathode tube lamp is low.

[0008] Also, in Patent Document 1, a V-shaped elastic metal member provided with a vertical groove smaller than the diameter of the outer lead at the bottom is used as a holder. In the holder disclosed in Patent Document 1, if the diameter of the outer lead of the cold-cathode tube lamp is too larger than the longitudinal groove, the cold-cathode tube lamp cannot be mounted, and the outer lead of the cold-cathode tube lamp cannot be installed. Diameter is longer than the longitudinal groove If it was too small, the contact pressure against the outer lead of the cold cathode tube lamp could not be secured sufficiently.

In view of the above problems, the present invention provides a light source holder for a display device having a high reliability of electrical connection between the outer leads of the light source for the display device and a lighting device for a display device including the same. And a display device.

Means for solving the problem

[0010] In order to achieve the above object, the light source holder for a display device according to the present invention is detachable from the light source for the display device, and holds the outer lead of the light source for the display device. A light source holder for a display device electrically connected to an outer lead, comprising a first member and a second member, wherein the first member when the light source for display device is mounted The holding part of the second member and the holding part of the second member are displaced so as to hold the outer lead by elastic force, and at a position closer to the mounting direction than the holding part, the first member and the second member The members intersect with each other when viewed from the axial direction of the outer lead.

[0011] According to such a configuration, the total displacement amount of the sandwiching portion of the first member and the sandwiching portion of the second member is

Since the diameter of the outer lead of the light source for the display device is not restricted within the range, the diameter of the outer lead of the light source for the display device can be set much larger. Therefore, when the light source for display device is mounted on the light source holder for display device according to the present invention.

The elastic force of the first member and the second member is increased, and a sufficient contact pressure with respect to the outer lead of the light source for the display device can be secured. Further, since the total displacement amount of the sandwiching portion of the first member and the sandwiching portion of the second member is not limited within the range of the diameter of the outer lead of the light source for the display device, the diameter of the outer lead of the light source for the display device is not limited. The margin for change increases. Thereby, the reliability of the electrical connection between the light source holder for a display device according to the present invention and the outer lead of the light source for the display device is increased.

[0012] Further, in the light source holder for a display device having the above-described configuration, the first member and the second member are arranged in a direction opposite to the mounting direction when the light source for the display device is mounted. There may be provided a backflow prevention portion for preventing the movement. Accordingly, it is necessary to separately provide a backflow prevention member for pressing the light source for the display device in the mounting direction. Disappears.

[0013] In addition, in the light source holder for a display device having the above-described configuration, the first member and the second member may be configured such that when the display device light source is attached, the outer lead is attached to the holding portion. You may make it have an invitation part for inviting. This facilitates mounting of the light source for the display device.

[0014] In the light source holder for a display device having the above-described configuration, a plurality of at least one of the first member and the second member may be provided. Thereby, the number of members that are constituent elements of the light source holder for display device according to the present invention is 3 or more, and the number of members that are constituent elements of the light source holder for display devices according to the present invention is two. Compared with, the rotational moment applied to the outer lead of the light source for the display device is reduced. In order to reduce the rotational moment applied to the outer leads of the light source for the display device, it is more desirable that the number of members that are components of the light source holder for the display device according to the present invention be 3 or more and an odd number. .

[0015] In order to achieve the above object, a display device illumination device according to the present invention includes a display device light source and a display device having any one of the above configurations that holds an outer lead of the display device light source. And a power supply device for supplying power to the light source for display device through the light source holder for display device.

In order to achieve the above object, a display device (for example, a television receiver) according to the present invention is configured to include the display device illumination device having the above configuration.

The invention's effect

[0017] According to the light source holder for a display device according to the present invention, the total displacement amount of the sandwiching portion of the first member and the sandwiching portion of the second member is within the range of the diameter of the outer lead of the light source for the display device. Therefore, a sufficient contact pressure with respect to the outer lead of the light source for the display device can be ensured. In addition, a margin for a change in the diameter of the outer lead of the light source for the display device is increased. Therefore, the reliability of the electrical connection between the light source holder for the display device and the counter lead of the light source for the display device can be increased.

Brief Description of Drawings

FIG. 1A shows a light source holder for a display device according to the present invention in a state where a light source is not attached. FIG.

[FIG. IB] is a view showing a light source holder for a display device according to the present invention in a state where a light source is not attached.

FIG. 2A is a view showing a light source holder for a display device according to the present invention in a state where a light source is mounted.

FIG. 2B is a view showing the light source holder for a display device according to the present invention in a state where the light source is mounted.

FIG. 3A is a view showing a modification of the light source holder for display device according to the present invention.

FIG. 3B is a view showing a modification of the light source holder for display device according to the present invention.

圆 4] is a top view showing a light source holder for a display device on one side when a plurality of cold-cathode tube lamps are driven in parallel.

FIG. 5 is a schematic cross-sectional view of a general cold cathode tube lamp used as a light source for a display device.

FIG. 6A is a diagram showing a conventional light source holder for a display device in a state where a light source is not attached.

FIG. 6B is a diagram showing a conventional light source holder for a display device in a state where a light source is not attached.

FIG. 7A is a diagram showing a conventional light source holder for a display device in a state where a light source is mounted.

FIG. 7B is a diagram showing a conventional light source holder for a display device in a state where a light source is mounted.

FIG. 8 is an exploded perspective view of a liquid crystal television receiver which is an example of the display device according to the present invention.

Explanation of symbols

1 Glass tube

2, 3 Internal electrode

4 Outer lead

6 Light source holder for display device according to the present invention 6 A First member

6B Second member

6C 3rd member

6A1, 6B1 Backflow prevention part

6A2, 6B2 Guide part

7 Backflow prevention member

11 Front cabinet

12 Back cabinet

13 Transmission type LCD

14 Tuner

15 Power supply

16 Stand

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, a general cold cathode tube lamp shown in FIG. 5 is used as a light source for a display device.

An example of a light source holder for a display device according to the present invention is shown in FIGS. 1A and 1B, and FIGS. 2A and 2B. 1A and 1B show a state in which the cold cathode tube lamp is not mounted on the light source holder for a display device according to the present invention, and FIGS. 2A and 2B show the display device in which the cold cathode tube lamp is according to the present invention. The state with which it is mounted | worn with the light source holder for light is shown. 1A and 2A are partial front views, and FIGS. 1B and 2B are side views of the outer leads as viewed from the axial direction.

[0022] The light source holder 6 for a display device according to the present invention includes a first member 6A, a second member 6B, and a third member 6C, which are elastic metal members (for example, panel steel). The first member 6A and the third member 6C correspond to the first member described in the claims, and the second member 6B is the second member described in the claims. It corresponds to.

[0023] By mounting the cold cathode tube lamp, the sandwiching portions of the first member 6A and the third member 6C are displaced by δ1, and the sandwiching portions of the second member 6 2 are displaced by δ2. At a position closer to the mounting direction D than the clamping part, the first member 6 mm and the second member 6 mm are the shafts of the outer leads 4. The third member 6C and the second member 6B intersect when viewed from the axial direction of the outer lead 4 (see FIGS. 1B and 2B).

[0024] δ 1 + δ 2 which is the total displacement amount of the sandwiching portion of the first member 6A or the sandwiching portion of the third member 6C and the sandwiching portion of the second member 6B is the outer lead of the cold-cathode tube lamp Since it is not restricted within the range of the diameter Φ of 4, it can be set larger than the diameter Φ of the outer lead 4 of the cold cathode tube lamp. Therefore, when a cold cathode tube lamp is mounted on the light source holder 6 for a display device according to the present invention, the elastic force of the first member 6Α, the second member 6Β, and the third member 6C increases. Sufficient contact pressure against the outer lead 4 of the cold cathode tube lamp can be secured. Further, since δ 1 + δ 2 is not restricted within the range of the diameter Φ of the outer lead 4 of the cold cathode tube lamp, a margin for a change in the diameter of the outer lead 4 of the cold cathode tube lamp is increased. Thereby, the reliability of the electrical connection between the light source holder 6 for a display device according to the present invention and the outer lead 4 of the cold cathode tube lamp is increased.

[0025] Further, the first member 6 第, the second member 6Β, and the third member 6C are respectively the first member 6Α, the second member 6Β, and the like when the cold cathode tube lamp is mounted. And a backflow preventing portion that prevents the outer lead 4 from moving in the direction opposite to the mounting direction D due to the inertial force of the third member 6C. In FIG. 2B, reference numeral 6A1 is a backflow prevention part of the first member 6Α, and reference numeral 6B1 is a backflow prevention part of the second member 6Β. When the first member 6 mm, the second member 6 mm, and the third member 6 C do not have the backflow prevention unit, for example, the backflow prevention member 7 is used for cooling as shown in FIGS. It is recommended to press the cathode tube lamp in the mounting direction D.

[0026] Also, the first member 6 2, the second member 6Β, and the third member 6C are each a lead-in portion for guiding the outer lead 4 into the clamping portion when the cold-cathode tube lamp is attached. have. The presence of the lead-in portion makes it easy to install the cold cathode tube lamp. In FIG. 1B, reference numeral 6Α2 is a leading portion of the first member 6Α, and reference numeral 6Β2 is a leading portion of the second member 6Β.

[0027] In the above-described embodiment, when the cold cathode tube lamp is mounted, three members (first member 6Α, second member 6Β, and third member 6C) have two intersections. Ν (Ν is an integer of 2 or 4) members form N—1 intersections. It can also be configured. However, when the two members form a single intersection, the rotational moment applied to the outer lead 4 increases. Therefore, in order to reduce the rotational moment applied to the outer lead 4, three or more It is more desirable to use an odd number of parts that it is desirable to use.

[0028] A part or all of a plurality of members (for example, the first member 6A, the second member 6B, and the third member 6C) that are components of the light source holder for a display device according to the present invention. May be joined at the bottom. For example, when a plurality of cold-cathode tube lamps are driven in parallel, all members of the light source holder for one display device may be coupled at the bottom as shown in the top view of FIG.

[0029] Further, the light source for display device mounted on the light source holder for display device according to the present invention is not limited to the configuration shown in FIG.

[0030] The display device illumination device according to the present invention includes a display device light source, an illumination unit, and an optical sheet, and the display according to the present invention provided in a pair on the front surface of the illumination unit. In this structure, the light source for display device is mounted on the light source holder for device, and the optical sheet covers the front of the illumination unit to which the light source for display device is attached. The bottom part of the light source holder for display device according to the present invention is fixed to the lighting unit, and a power supply device electrically connected to the light source holder for display device according to the present invention is provided on the back surface of the lighting unit. ing.

[0031] A display device according to the present invention includes the display device illumination device according to the present invention and a display panel. As a specific aspect of the display device according to the present invention, for example, a transmissive liquid crystal display device in which the illumination device for display device according to the present invention is used as a backlight unit and a liquid crystal display panel is provided in front of the backlight unit.

FIG. 8 shows an example of an exploded perspective view when the display device according to the present invention is a liquid crystal television receiver. A transmissive liquid crystal display unit 13, a tuner 14, and a power supply 15 are stored between the front cabinet 11 and the back cabinet 12, and the back cabinet 12 is held by a stand 16. The transmissive liquid crystal display unit 13 uses the display device illumination device according to the present invention as a backlight unit, and is provided with a liquid crystal display panel in front of it. Industrial applicability The light source holder for a display device of the present invention can be used as a holder for detachably holding various light sources for a display device having an outer lead, including a light source for a liquid crystal television receiver having an outer lead.

Claims

The scope of the claims

[1] A light source for a display device that can be attached to and detached from the light source for the display device and that is electrically connected to the outer lead in a state of holding the outer lead of the light source for the display device Because

A first member and a second member;

When the light source for the display device is mounted, the sandwiching portion of the first member and the first light source

The clamp member of the second member is displaced to clamp the outer lead by an elastic force, and the first member and the second member are connected to the counter at a position closer to the mounting direction than the clamp unit. Light source holder for display device, characterized by crossing when viewed from the axial direction of the lead

[2] The first member and the second member have a backflow prevention unit that prevents the outer lead from moving in the direction opposite to the mounting direction when the light source for the display device is mounted. The light source holder for a display device according to claim 1.

[3] The first member and the second member have a guide portion and a guide portion for guiding and inserting the outer lead into the clamping portion when the light source for display device is mounted. The light source holder for a display device according to 1.

4. The display device light source holder according to claim 1, wherein a plurality of at least one of the first member and the second member is provided.

5. The display device light source holder according to claim 4, wherein the total number of the first member and the second member is an odd number.

[6] a light source for a display device;

The light source holder for a display device according to any one of claims 1 to 5, which holds an outer lead of the light source for the display device,

A display device illumination device comprising: a power supply device that supplies power to the display device light source through the display device light source holder.

7. A display device comprising the illumination device for a display device according to claim 6.

8. The display device according to claim 7, wherein the display device is a television receiver.