KR20090034580A - Display module - Google Patents

Abstract

A display device for improving picture quality is provided to improve the picture quality by comparing the display device arranging a sensor on a surface displaying the image by arranging the sensor to the external surface. A light source(600) generates light on a display panel. A sensor unit(500) senses the light. A light guide member(300) inserts the light which is income from the light source to the display panel. The light guide member comprises a light guide plate(310), a light guide member(320) and a sensing light guide member(400). The light guide plate is arranged on the display panel. The light guide member is arranged in the side of the light guide plate. The sensing light guide member outputs the light which is income from the light source to the sensor unit.

Description

Display device {DISPLAY MODULE}

An embodiment relates to a display device.

A display device including a touch pad for receiving a signal input by a user through a touch or the like has been developed on a surface on which an image of the display device is displayed.

An embodiment is to provide a display device that receives a signal input by a user on a surface on which an image is displayed and improves image quality. In addition, the embodiment is to provide a display device with less power consumption.

A display device according to an embodiment includes a display panel, a light source for generating light on the display panel, and a sensor unit for sensing the light.

In the display device according to the exemplary embodiment, the sensor unit may be disposed outside the surface where the image is displayed. Therefore, the display device according to the embodiment is improved in image quality compared to the display device in which a sensor is disposed on a surface on which an image is displayed.

In addition, the display device according to the embodiment can be used to display the image from the light source to the front light, the power consumption is low.

1 is an exploded perspective view showing a reflective liquid crystal display device according to an embodiment. 2 is a plan view illustrating a reflective liquid crystal display device according to an embodiment. FIG. 3 is a cross-sectional view taken along line II ′ in FIG. 2.

1 to 3, the reflective liquid crystal display device includes a case 100, a liquid crystal panel 200, a front light guide part 300, a sensing light guide member 400, a sensor part 500, and a light source. And 600.

The case 100 accommodates the liquid crystal panel 200, the front light guide part 300, the sensing light guide member 400, the sensor part 500, and the light source 600. The case 100 includes four sidewalls and a bottom plate.

The liquid crystal panel 200 is disposed inside the case 100. The liquid crystal panel 200 displays an image by light generated from the light source 600 and / or external light. The liquid crystal panel 200 includes a reflector 210, a TFT substrate 220, a color filter substrate 230, a liquid crystal layer 240, and a polarizer 250.

The reflector 210 reflects light generated from the light source 600 and / or external light upwards.

The TFT substrate 220 is disposed on the reflective plate 210. The TFT substrate 220 may include a plurality of gate wires, data wires crossing the gate wires, and a thin film transistor electrically connected to the data wires, and may be electrically connected to the gate wires and the data wires. The electric field is formed for each pixel by the signal.

The color filter substrate 230 is disposed spaced apart from the TFT substrate 220 at predetermined intervals, and is disposed to face each other. The color filter substrate 230 includes a plurality of color filters. For example, one color filter is disposed on each color filter substrate 230. The reflection type liquid crystal display displays an image including color by the color filter.

The liquid crystal layer 240 is interposed between the TFT substrate 220 and the color filter substrate 230. The liquid crystals included in the liquid crystal layer 240 are aligned by the electric field formed by the electrical signal, and the image is displayed by adjusting the amount of light passing through the liquid crystal layer 240 for each pixel.

The polarizer 250 is disposed on the color filter substrate 230. The polarizer 250 filters the light generated by the light source 600 and / or external light and passes the polarized light in a predetermined direction.

The front light guide part 300 is disposed on the liquid crystal panel 200. The front light guide part 300 guides the light generated from the light source 600 to the liquid crystal panel 200. That is, the front light guide part 300 receives the light generated from the light source 600, diffuses the light, and emits the light toward the liquid crystal panel 200.

The front optical guide part 300 includes an optical guide plate 310 and an outer optical guide member 320.

The optical guide plate 310 is disposed on the liquid crystal panel 200 and has a plate shape. Examples of the material that can be used as the light guide plate 310 include poly methyl methacrylate (PMMA), acrylonitrile styrene (AS), polystyrene (PS), polycarbonate; PC), polyethersulfone (PES), polyamide (PA), polyesterimide (PEI), polymethylpentene (PMP), and the like.

The outer light guide member 320 is disposed at the outer side of the light guide plate 310. For example, the outer light guide member 320 is disposed on the side of the light guide plate 310. An example of a material that may be used as the outer light guide member 320 is the same as an example of a material that may be used as the light guide plate 310.

The outer light guide member 320 includes a first outer light guide member 321, a second outer light guide member 322, and a third outer light guide member 323.

The first outer light guide member 321 is disposed on the side of the light guide plate 310. The second outer light guide member 322 is disposed on a side that intersects a side on which the first outer light guide member 321 is disposed. The third outer light guide member 323 is disposed between the first outer light guide member 321 and the second outer light guide member 322.

The sensing light guide member 400 is disposed on the front light guide part 300. The sensing light guide member 400 emits light generated from the light source 600 toward the sensor unit 500.

For example, the light emitted from the sensing light guide member 400 is incident on the sensor unit 500 across the light guide plate 310. An example of a material that may be used as the sensing light guide member 400 is the same as an example of a material that is used as the light guide plate 310.

The sensing light guide member 400 includes a first sensing light guide member 410, a second sensing light guide member 420, and a third sensing light guide member 430.

The first sensing light guide member 410 is disposed on the first outer light guide member 321. The second sensing light guide member 420 is disposed on the second outer light guide member 322. The first sensing light guide member 410 and the second sensing light guide member 420 have a bar shape, for example.

The first sensing light guide member 410 and the second sensing light guide member 420 may include a device capable of focusing light, for example, a plurality of lenses.

The third sensing light guide member 430 is disposed on the third outer light guide member 323. That is, the third sensing light guide member 430 is disposed between the first sensing light guide member 410 and the second sensing light guide member 420.

The sensor unit 500 is disposed inside the case 100 and disposed to face the sensing light guide member 400. The sensor unit 500 is disposed outside the surface on which the image of the liquid crystal panel 200 is displayed.

The sensor unit 500 includes sensors 521 for detecting a plurality of lights, and includes a light blocking member 522 for blocking a part of external light incident to the sensor. The sensors 521 are arranged according to the position. The sensors 521 sense light and convert it into an electrical signal. The sensors 521 may be, for example, a plurality of photo diodes.

That is, the sensor unit 500 receives the light emitted from the sensing light guide member 400 and converts the light into an electrical signal and transmits it to an electric signal to a driving circuit or an information processing device of the liquid crystal display.

The sensor unit 500 includes a first sensor unit 510 and a second sensor unit 520. The first sensor unit 510 is disposed to face the first sensing light guide member 410, and the second sensor unit 520 is disposed to face the second sensing light guide member 420.

The light source 600 is disposed inside the case 100. The light source 600 is one, and is disposed on the side of the third outer light guide member 323 and the side of the third sensing light guide member 430. The light source 600 emits light, and the light source 600 is, for example, a light emitting diode (LED), a cold cathode fluorescent lamp (CCFL) or an external electrode lamp (external electrode). fluorescent lamps (EEFL); and the like.

Unlike this, the light source 600 may be provided in plural, one on the side of the third outer light guide member 323, and the other on the side of the third sensing light guide member 430. Can be.

The third outer light guide member 323 receives a portion of the light generated from the light source 600 and emits the light to the first outer light guide member 321 and the second outer light guide member 322.

For example, the third outer light guide member 323 receives light through a first incident surface corresponding to the light source 600, and emits a first light corresponding to the first outer light guide member 321. Light is emitted through the second emission surface corresponding to the surface and the second outer light guide member 322.

The first outer light guide member 321 receives the light emitted from the third outer light guide member 323 and emits the light to the light guide plate 310.

For example, the first outer light guide member 321 receives the light exiting from the first exit surface through a surface corresponding to the third outer light guide member 323, and the light guide plate 310. The light is emitted through the plane corresponding to).

The second outer light guide member 322 receives light emitted from the third outer light guide member 323 and emits the light to the light guide plate 310.

For example, the second outer light guide member 322 receives the light exiting from the second exit surface through a surface corresponding to the third outer light guide member 323, and the light guide plate 310. Exit through the side corresponding to).

The light guide plate 310 receives light emitted from the first outer light guide member 321 and the second outer light guide member 322 and exits the light guide plate 310 to the liquid crystal panel 200.

For example, the light guide plate 310 corresponds to the light emitted from the first and second outer light guide members 321 and 322 to the first and second outer light guide members 321 and 322. It is incident through the side surfaces and exits through the lower surface corresponding to the liquid crystal panel 200.

Light emitted through the optical guide plate 310 passes through the polarizing plate 250, the color filter substrate 230, the liquid crystal layer 240, and the TFT substrate 220, and passes through the reflective plate 210. Is reflected by. The reflective liquid crystal display according to the embodiment displays an image by the reflected light.

The third sensing light guide member 430 receives a portion of the light generated from the light source 600 and emits the light to the first and second sensing light guide members 410 and 420.

For example, a part of the light generated from the light source 600 is incident on the third sensing light guide member 430 through the second incident surface 433 corresponding to the light source 600.

In addition, the third sensing light guide member 430 may transmit the incident light to the third emission surface 431 and the second sensing light guide member 420 corresponding to the first sensing light guide member 410. It exits through the corresponding 4th exit surface 432.

The first sensing light guide member 410 receives light emitted through the third emission surface 431 and emits the light toward the first sensor unit 510.

For example, the first sensing light guide member 410 receives light emitted through the third emission surface 431 through a side surface corresponding to the third sensing light guide member 430.

In this case, the light is totally reflected in the first sensing light guide member 410, diffuses, and is emitted toward the first sensor unit 510. The emitted light is incident on the first sensor unit 510 across the light guide plate 310.

The second sensing light guide member 420 receives light emitted through the fourth emission surface 432 and emits the light toward the second sensor unit 520.

For example, the second sensing light guide member 420 receives light emitted through the fourth emission surface 432 through a side surface corresponding to the third sensing light guide member 430.

In this case, the light is totally reflected in the second sensing light guide member 420, diffuses, and is emitted toward the second sensor unit 520. After the light is emitted, the light is incident on the second sensor unit 520 across the light guide plate 310.

The light incident on the first sensor unit 510 is converted into an electrical signal by the sensors included in the first sensor unit 510, and the electrical signal drives the liquid crystal display according to the embodiment. It is transmitted to an information processing apparatus connected to a circuit or a liquid crystal display.

Similarly, the light incident on the second sensor unit 520 is converted into an electrical signal by the sensors 521 included in the second sensor unit 520 and transmitted to a driving circuit or an information processing apparatus.

When an opaque object such as a finger is positioned on the light guide plate 310 by a user, a part of light emitted from the first sensing light guide member 410 and incident on the first sensor unit 510 is provided. Is blocked, and a part of the light emitted from the second sensing light guide member 420 and incident on the second sensor unit 520 is blocked.

In addition, the sensor detects a decrease in light blocked by the object among the sensors included in the first sensor unit 510 and the object among the sensors 521 included in the second sensor unit 520. By the sensor for detecting the reduction of the blocked light, it is possible to determine the position of the object.

In addition, the change of the electrical signal in the sensors for detecting the decrease in light may be input to a driving circuit of the liquid crystal display device or an information processing device connected to the liquid crystal display device, and then displayed on the liquid crystal display device.

In the reflective LCD according to the present embodiment, a sensor for detecting a user's signal is disposed outside the surface on which the image is displayed, so that the sensor can realize high quality in comparison with the liquid crystal display on the surface on which the sensor is displayed. have.

In addition, the reflective liquid crystal display according to the present embodiment detects a user's signal using a part of the light emitted from one light source 600, and uses another part of the light emitted from the light source 600, Since the image is displayed, the light efficiency can be improved and the power consumption can be reduced.

4 is a cross-sectional view illustrating a cross section of a reflective liquid crystal display device according to another exemplary embodiment. This embodiment will be described with reference to the above-described embodiment, and the outer light guide member 320 and the sensing light guide member 400 will be further described.

Referring to FIG. 4, the first outer light guide member 321 and the first sensing light guide member 410 of FIG. 1 are integrally formed, and the second outer light guide member 322 and the second light guide member 322 are integrally formed. The sensing light guide member 420 is integrally formed, and the third outer light guide member 323 and the third sensing light guide member 430 are integrally formed.

Unlike this, the outer light guide member 320, the sensing light guide member 400, and the light guide plate 310 may be integrally formed.

Therefore, time and cost consumed in the manufacturing process of the reflective liquid crystal display according to the present embodiment can be saved.

In addition, since the amount of light consumed between the light guide members integrally formed is reduced, the overall light consumption can be reduced in the reflective liquid crystal display according to the present embodiment.

5 is a cross-sectional view illustrating a cross section of a reflective liquid crystal display device according to still another embodiment. In the present embodiment, with reference to the embodiments described with reference to FIGS. 1 to 3, the elastic member 700 and the protection member 800 will be further described.

Referring to FIG. 5, the reflective liquid crystal display includes an elastic member 700 and a protection member 800.

The elastic member 700 is interposed between the liquid crystal panel 200 and the optical guide plate 310. Since the elastic member 700 has elasticity, the elastic member 700 absorbs the physical shock transmitted through the optical guide plate 310 and protects the liquid crystal panel 200.

Examples of the material that can be used as the elastic member 700 may include an acrylic resin, a polyvinyl resin, a polyurethane resin, and the like.

The elastic member 700 is in close contact with the liquid crystal panel 200 and the optical guide plate 310. Therefore, no air layer exists between the liquid crystal panel 200 and the optical guide plate 310, and the image displayed on the liquid crystal panel 200 is emitted to the outside without passing through the air layer.

Accordingly, the reflective liquid crystal display according to the present exemplary embodiment may prevent the image from deteriorating while the image passes through the air layer, and display an image of higher quality than the liquid crystal display according to the above-described exemplary embodiment.

The protective member 800 is disposed on the light guide plate 310. The protection member 800 protects the optical guide plate 310 and the liquid crystal panel 200. Examples of the material that can be used as the protective member 800 include acrylic, glass, tempered glass and film.

An impact absorbing member may be interposed between the protective member 800 and the optical guide plate 310, and the shock absorbing member may be in close contact with the protective member 800 and the optical guide plate 310. Examples of materials that can be used as the shock absorbing member are the same as examples of materials that can be used as the elastic member 700.

Since the protection member 800 protects the light guide plate 310 and the liquid crystal panel 200, the reflective liquid crystal display according to the present embodiment is more resistant to external physical impact than the above-described embodiments. It can bear well.

6 to 9 are plan views illustrating a light source, an outer light guide member, and a sensing light guide member according to still another embodiment.

6 to 9, the light source 600, the outer light guide member 320, and the sensing light guide member 400 will be further described with reference to the embodiments described with reference to FIGS. 1 to 3. .

Referring to FIG. 6, the reflective liquid crystal display does not include the third outer light guide member and the third sensing light guide member.

In addition, the light source 600 includes a first light source 610 and a second outer light guide member 322 and a second sensing light guide member 420 facing the first outer light guide member 321 and the first sensing light guide member. And a second light source 620 facing).

In the reflective LCD according to the present exemplary embodiment, the two light sources 600 do not pass through the third outer light guide member 323 and the third sensing light guide member 430, and the first and second outer light guides. Light is directly emitted to the members 321 and 322 and the first and second sensing light guide members 410 and 420.

Accordingly, in the reflective liquid crystal display according to the present embodiment, the efficiency of light incident to the image and the light incident on the sensor unit 500 is further improved, compared to the reflective liquid crystal display according to the embodiments described above. The signal can be received more sensitively, and a better image can be displayed.

Referring to FIG. 7, in the reflective LCD, the first to third outer light guide members 321, 322, and 323 are integrally formed, and the first to third sensing light guide members 410, 420, and 430. Is formed integrally.

Accordingly, the reflective liquid crystal display device according to the present embodiment can reduce the consumption of light between the first and second outer light guide members 321 and 322 and the third outer light guide member 323. Light consumption between the second sensing light guide members 410 and 420 and the third sensing light guide member 430 may be reduced.

Therefore, the reflective liquid crystal display according to the present exemplary embodiment may realize more improved light efficiency and image quality than the reflective liquid crystal display according to the above-described embodiments.

8 and 9, the third outer light guide member 323 includes a concave or convex first emission surface, and includes a first entrance surface and a second entrance surface. In addition, the third sensing light guide member 430 includes a second exit surface that is concave or convex, and includes a third entrance surface and a fourth entrance surface.

For example, the concave or convex first exit surface and the second exit surface may have a quarter circle shape when viewed in plan.

The light source 600 includes a first light source 610 disposed on the first incident surface and the third incident surface and a second light source 620 disposed on the second incident surface and the fourth incident surface. .

In the reflective liquid crystal display according to the present exemplary embodiment, light incident from the light source 600 through the first to fourth emission surfaces through the concave or convex first and second emission surfaces is more uniform. Spread out.

Therefore, the light generated from the light source 600 is more uniformly incident on the sensor unit 500 and the liquid crystal panel 200, and the reflective liquid crystal display according to the present exemplary embodiment can detect a user's signal more accurately. More uniform images can be displayed.

10 to 13 are perspective views illustrating shapes of a first outer optical guide member, a second outer optical guide member, a first sensing optical guide member, or a second sensing optical guide member according to another embodiment. In the present embodiment, the first and second outer light guide members and the first and second sensing light guide members will be further described with reference to the above-described embodiments.

10 to 13, the first and second outer light guide members and the first and second sensing light guide members have concave or convex sides. For example, the first and second outer light guide members and the first and second sensing light guide members may have concave or convex sides facing each other.

The first and second outer light guide members are disposed such that the concave or convex side faces the light guide plate 310.

Alternatively, the first and second outer light guide members may be disposed such that the concave or convex side faces in the direction opposite to the light guide plate 310.

In addition, the light guide plate 310 may have a convex or concave side surface corresponding to the concave or convex side surfaces of the first and second outer light guide members.

In the reflective LCD according to the present exemplary embodiment, the first and second outer optical guide members and the first and second sensing optical guide members have concave or convex side surfaces. More uniform light is emitted from the member and the first and second sensing light guide members.

 Therefore, the emitted light is more uniformly incident on the sensor unit 500 and the liquid crystal panel 200, and the reflective liquid crystal display according to the present embodiment can more accurately sense a user's signal. A uniform image can be displayed.

1 is an exploded perspective view showing a reflective liquid crystal display device according to an embodiment.

2 is a plan view illustrating a reflective liquid crystal display device according to an embodiment.

FIG. 3 is a cross-sectional view taken along line II ′ in FIG. 2.

4 is a cross-sectional view illustrating a cross section of a reflective liquid crystal display device according to another exemplary embodiment.

5 is a cross-sectional view illustrating a cross section of a reflective liquid crystal display device according to still another embodiment.

6 to 9 are plan views illustrating a light source, an outer light guide member, and a sensing light guide member according to still another embodiment.

10 to 13 are perspective views illustrating shapes of a first outer optical guide member, a second outer optical guide member, a first sensing optical guide member, or a second sensing optical guide member according to another embodiment.

Claims (18)

Display panel; A light source generating light on the display panel; A sensor unit for sensing the light; And And a light guide member configured to emit light incident from the light source toward the sensor unit and / or the display panel. The display device of claim 1, wherein the optical guide member comprises an optical guide plate disposed on the display panel and configured to emit light incident from the light source to the display panel. The display device of claim 2, wherein the light guide member comprises an outer light guide member disposed on a side of the light guide plate and configured to emit light incident from the light source to the light guide plate. The display device of claim 1, wherein the light guide member comprises a sensing light guide member configured to emit light incident from the light source to the sensor unit. The display device of claim 2, further comprising an elastic member interposed between the optical guide plate and the display panel. The display device of claim 2, further comprising a protection member disposed on the optical guide plate. The light guide member of claim 1, wherein the light guide member comprises: a sensing light guide member that emits light incident from the light source to the sensor unit; an optical guide plate that emits light incident from the light source to the display panel; And an outer light guide member for emitting light to the light guide plate. The optical sensor of claim 4, wherein the sensing light guide member comprises: a first sensing light guide member that emits light incident from the light source in a first direction, and a second sensing light guide that emits light incident from the light source in a second direction; And a third sensing light guide member which emits light incident from the light source toward the first sensing light guide member and the second sensing light guide member. The display device of claim 7, wherein the light source comprises a first light source emitted to the sensing light guide member and a second light source emitted to the outer light guide member. The display device of claim 8, wherein the third sensing light guide member has a concave or convex exit surface. The display device of claim 8, wherein the third sensing light guide member is integrally formed with the first sensing light guide member and / or the second sensing light guide member. The display device of claim 4, wherein the sensing light guide member has a bar shape. The display device of claim 4, wherein the sensing light guide member has a concave or convex surface. The light emitting device of claim 3, wherein the outer light guide member comprises: a first outer light guide member emitting light incident from the light source in a first direction; and a second outer light guide emitting light incident from the light source in a second direction; And at least one of a third sensing light guide member which emits light incident from the light source toward the first outer light guide member and the second outer light guide member. A display panel having a surface on which an image is displayed; An optical guide plate disposed on the display panel and configured to receive light generated from a light source and emit the light toward the display panel; And And an elastic member interposed between the display panel and the optical guide plate and in close contact with the display panel and the optical guide plate. The display device of claim 15, further comprising a protection member on the optical guide plate. The display device of claim 15, further comprising an impact absorbing member interposed between the protective member and the optical guide plate and in close contact with the protective member and the optical guide plate. The light emitting device of claim 15, further comprising: a sensing light guide member disposed on a side of the display device and configured to emit light to a sensor unit configured to sense light incident from the light source; Display device including at least one of the guide member.

Images