TWI406055B - Liquid crystal display - Google Patents

Abstract

A liquid crystal display includes a panel, a light guide plate, a first lighting element, and a case. The light guide plate is opposite the panel, and this light guide plate has a first side surface and a second side surface opposite each other. The first lighting element is disposed adjacent to the light guide plate, and the lighting face of the lighting element faces the first side surface of the light guide plate. The case contains the panel, the light guide plate, and the first lighting element. The case has a first opening disposed on the case for exposing the second side surface of the light guide plate.

Description

LCD Monitor

This invention relates to a display, and more particularly to a liquid crystal display.

The production technology of today's liquid crystal displays has become quite mature. For example, in various personal computers (PCs), notebook computers (Notebook Computers) and handheld devices (Handheld Devices), liquid crystal displays have defeated other flat-panel displays. Become the mainstream of the display. However, as the competition for consumer electronics becomes more intense, consumers are no longer satisfied with liquid crystal displays that only offer traditional functions. Therefore, manufacturers in related industries must strive to make LCD monitors have more diverse functions in order to gain the favor of consumers.

One aspect of the present invention is a liquid crystal display that utilizes an original light source in a liquid crystal display for external illumination.

A liquid crystal display comprises a liquid crystal panel, a light guide plate, a first light source and a casing. The light guide plate is disposed opposite to the liquid crystal panel, and the light guide plate has a first side and a second side opposite to each other. The first light source is adjacent to the light guide plate, and the light emitting surface of the first light source faces the first side of the light guide plate. The outer casing houses the liquid crystal panel, the light guide plate and the first light source, and the outer casing has a first light exiting opening. The first light exiting opening penetrates the outer casing and exposes the second side of the light guiding plate.

In addition to the application of the first light source in the liquid crystal display, the manufacturer may additionally need to install a second light source as the case may be. Specifically, the second light source can be disposed in a peripheral circuit area of the liquid crystal panel and electrically connected to the circuit of the liquid crystal panel. In addition, the outer casing may further include a second light exiting opening, the second light exiting opening penetrating through the outer casing and opposite to the light emitting surface of the second light source, so that the light emitted by the second light source can pass through the second light exiting opening and exit the outer casing. In addition, as a lighting or instruction.

In view of the fact that the liquid crystal itself does not emit light, a liquid crystal display is usually provided with a light source inside, so that the liquid crystal panel can provide a normal and well-balanced image. The following embodiments of the present invention are provided with a light exit opening on the outer casing of the liquid crystal display, so that the light provided by the internal light source of the liquid crystal display can be emitted outside the outer casing for external illumination.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing an embodiment of a liquid crystal display of the present invention. As shown, a liquid crystal display 100 includes a liquid crystal panel 110, a light guide plate 120, a first light source 130, and a housing 140. The light guide plate 120 is disposed opposite to the liquid crystal panel 110, and the light guide plate 120 has a first side surface 122 and a second side surface 124 opposite to each other. The first light source 130 is adjacent to the light guide plate 120 , and the light emitting surface 132 of the first light source 130 faces the first side surface 122 of the light guide plate 120 . The housing 140 houses the liquid crystal panel 110, the light guide plate 120 and the first light source 130, and the first light exit opening 150 is formed in the outer casing 140. The first light exit opening 150 extends through the outer casing 140 and exposes the second side surface 124 of the light guide plate 120.

In use, the first light source 130 will face the first side of the light guide plate 120 Face 122 emits light. The light guide plate 120 uniformly scatters a part of the light out of the light-emitting surface 126 of the light guide plate 120, and serves as a backlight BL for display and display by the liquid crystal panel 110. However, even if the efficiency of the light guide plate 120 is higher, some light will eventually hit the second side 124 of the light guide plate 120. Therefore, in this embodiment, the first light exit opening 150 is disposed on the outer casing 140 at a position opposite to the second side surface 124, so that the light of this portion is emitted outside the outer casing 140 and can be used as the light source SL for external illumination.

In this embodiment, the first light source 130 is a light emitting diode (LED) or a laser diode (LD). However, this does not limit the present invention, and those skilled in the art to which the present invention pertains may flexibly select an embodiment of the first light source 130 as needed.

In addition to the application of the first light source 130 of the liquid crystal display 100 itself, the manufacturer may additionally need to additionally install the second light source 160 for illumination. The first and second figures will be exemplified below to specifically describe the above technical contents.

Referring to FIG. 1 , the liquid crystal panel 110 of FIG. 1 includes a first substrate 112 , a second substrate 114 , and at least one line 116 . The first substrate 112 has a peripheral circuit region 113. The second substrate 114 covers the first substrate 112 but exposes the peripheral circuit region 113. The line 116 is disposed on the peripheral circuit area 113.

The manufacturer may choose to place the second light source 160 in the peripheral circuit region 113 and electrically connect the line 116. In this embodiment, the light emitting surface 162 of the second light source 160 is opposite to the peripheral circuit region 113. That is, the light-emitting surface 162 of the second light source 160 faces upward of the first figure and is parallel to the display surface 115 of the liquid crystal panel 110.

In addition, the outer casing 140 may further include a second light exiting opening 170. The second light exiting opening 170 extends through the outer casing 140 and is opposite to the light emitting surface 162 of the second light source 160. In use, the light IL emitted by the second light source 160 will pass through the second light exit port 170 and exit the outer casing 140 for illumination or indication.

If necessary, the manufacturer can also provide a concentrating mirror 180 at the second light exiting port 170 to concentrate the light IL emitted by the second light source 160 on a small area to provide high-intensity illumination or indication. In addition, providing the condensing mirror 180 in the second light exiting port 170 can prevent dust or moisture from entering the outer casing 140 through the second light exiting opening 170, thereby damaging the liquid crystal panel 110.

In practical applications, the manufacturer can place the flexible printed circuit board 190 in the peripheral circuit area 113 and electrically connect the line 116. As such, the voltage required to drive the second source 160 will be provided to the second source 160 through the flexible printed circuit board 190 and line 116.

In this embodiment, the second light source 160 can be a light emitting diode (LED) or a laser diode (LD). However, this does not limit the invention, and those skilled in the art to which the present invention pertains may flexibly select an embodiment of the second light source 160 as needed.

2 is a cross-sectional view showing another embodiment of the liquid crystal display of the present invention. The difference between this embodiment and the previous embodiment is that the light-emitting surface 162 of the second light source 160 of the embodiment is opposite to the second substrate 114. That is, the light-emitting surface 162 of the second light source 160 faces the right side of the second figure and is perpendicular to the display surface 115 of the liquid crystal panel 110.

Similarly, when in use, the light IL emitted by the second light source 160 will The light exiting the outer casing 140 through the second light exit opening 170 is different from that of the first embodiment in that the light IL of the first embodiment is emitted from the top surface of the outer casing 140 outside the outer casing 140, and the light IL of the embodiment is The outer side of the outer casing 140 is emitted from the side of the outer casing 140. Those skilled in the art to which the present invention pertains should flexibly select the arrangement of the second light source 160 depending on the desired direction of the light IL.

In this embodiment, the user may choose to correspondingly set the outer cover 200 to the first light exit opening 150, thereby opening or closing the first light exit opening 150. Specifically, a surface of the outer cover 200 facing the light guide plate 120 may be provided with a reflective surface 210, which reflects the light emitted from the second side surface 124 of the light guide plate 120 back to the light guide plate 120, thereby improving Light extraction efficiency of the light guide plate 120. In practice, the manufacturer may choose white or silver as the color of the reflective surface 210.

It should be understood that the structures illustrated in FIGS. 1 to 2 are only a part of the numerous embodiments of the present invention, and the manufacturer still needs to adjust the embodiment of the liquid crystal display according to actual needs, and is not limited to the above. For example, although the first figure is to set the condensing mirror 180 to the second light exiting port 170, this does not limit the present invention. Those skilled in the art to which the present invention pertains should be able to flexibly adjust the position of the condensing mirror according to the need at that time— For example, a concentrating mirror is disposed at the first light exit port, or a condensing mirror is disposed at both the first light exit port and the second light exit port.

Similarly, although the second embodiment is provided with the outer cover 200 corresponding to the first light exit opening 150, those skilled in the art to which the present invention pertains can elastically adjust the position of the outer cover according to actual needs - for example, the outer cover correspond The cover is disposed at the second light exit port, or the outer cover is disposed at the first light exit port and the second light exit port.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧LCD display

110‧‧‧LCD panel

112‧‧‧First substrate

113‧‧‧ peripheral circuit area

114‧‧‧second substrate

115‧‧‧ display surface

116‧‧‧ lines

120‧‧‧Light guide

122‧‧‧ first side

124‧‧‧ second side

126‧‧‧Glossy

130‧‧‧First light source

132‧‧‧Glossy

140‧‧‧Shell

150‧‧‧first light exit

160‧‧‧second light source

162‧‧‧Glossy

170‧‧‧Second light exit

180‧‧‧Condenser

190‧‧‧Soft printed circuit board

200‧‧‧ Cover

210‧‧‧reflecting surface

SL‧‧‧Light

BL‧‧‧Backlight

IL‧‧‧Light

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing an embodiment of a liquid crystal display of the present invention.

2 is a cross-sectional view showing another embodiment of the liquid crystal display of the present invention.

100‧‧‧LCD display

110‧‧‧LCD panel

112‧‧‧First substrate

113‧‧‧ peripheral circuit area

114‧‧‧second substrate

115‧‧‧ display surface

116‧‧‧ lines

120‧‧‧Light guide

122‧‧‧ first side

124‧‧‧ second side

126‧‧‧Glossy

130‧‧‧First light source

132‧‧‧Glossy

140‧‧‧Shell

150‧‧‧first light exit

160‧‧‧second light source

162‧‧‧Glossy

170‧‧‧Second light exit

180‧‧‧Condenser

190‧‧‧Soft printed circuit board

SL‧‧‧Light

BL‧‧‧Backlight

IL‧‧‧Light

Claims (11)

A liquid crystal display comprising: a liquid crystal panel; a light guide plate disposed opposite to the liquid crystal panel, wherein the light guide plate has a first side and a second side opposite to each other; a first light source adjacent to the light guide plate, and the light guide a light emitting surface of the first light source faces the first side of the light guide plate; a casing accommodating the liquid crystal panel, the light guide plate and the first light source, and the outer casing has a first light exit opening through the outer casing and exposing The second side of the light guide plate is disposed; and an outer cover is disposed on the first light exit opening to open or close the first light exit opening. The liquid crystal display of claim 1, wherein the outer cover has a reflective surface disposed on a side of the outer cover facing the light guide plate. The liquid crystal display of claim 1, wherein the liquid crystal panel comprises: a first substrate having a peripheral circuit region; a second substrate covering the first substrate but exposing the peripheral circuit region; and at least one line It is disposed on the peripheral circuit area. The liquid crystal display according to claim 3, further comprising: A second light source is disposed in the peripheral circuit region and electrically connected to the circuit. The liquid crystal display of claim 4, wherein the light emitting surface of the second light source faces away from the peripheral circuit region. The liquid crystal display of claim 4, wherein the light emitting surface of the second light source faces away from the second substrate. The liquid crystal display according to claim 4, wherein the outer casing further comprises a second light exiting opening and extending through the outer casing and opposite to the light emitting surface of the second light source. The liquid crystal display according to claim 7, further comprising: a condensing mirror disposed at the second light exit opening. The liquid crystal display of claim 4, further comprising: a flexible printed circuit board disposed in the peripheral circuit area and electrically connected to the line. The liquid crystal display of claim 4, wherein the second light source is a light emitting diode (LED) or a laser diode (LD). The liquid crystal display of claim 1, wherein the first light source is a light emitting diode (LED) or a laser diode (LD).