WO2004019307A1 - Flat panel display unit - Google Patents

Abstract

A flat panel display unit having a built-in self-luminous light source that emits a display light for displaying characters and/or images. A half-mirror layer that reflects a light from the outside and transmits a display light from the inside is provided to cover the display surface. The layer does not prevent visibility when a display screen is used and can be used as a mirror when it is not used.

Description

 Specification

 Flat panel display device Technical field

 The present invention relates to a flat panel display device incorporating a self-luminous light source that emits display light for displaying characters, Z, or images. Background art

 This type of flat panel display device includes a TFT liquid crystal display panel with a built-in backlight unit that combines a light source such as a fluorescent lamp and a scattering reflector, and an organic electrification luminescence (PLED) in which the pixel elements themselves have a light emitting function. EL) A display panel or a plasma display panel is known.

 Liquid crystal display panels and EL display panels are relatively small portable devices such as digital mobile phones, PHS (Personal Handyphone System) terminals, or portable information devices such as PDAs (Personal Digital Assistance). It is widely used in all kinds of display devices, from notebook personal computers, desktop personal computers, home computer game machines, DVD playback devices, and display devices for television receivers. On the other hand, plasma display panels are becoming more widespread as AV displays for relatively large AV equipment and television receivers.

 In recent years, the spread of mobile phones has been remarkable, and many people carry them and use them not only for telephone purposes but also for sending and receiving e-mails and searching for information via the Internet. The latter uses PDAs and notebooks. Portable personal computers are also in widespread use. In home use equipment, the display devices of computer game consoles and television receivers are increasingly being replaced by flat panel display devices from CRTs, and these installation forms can also be placed on desktops or mounted on walls. It is changing from the traditional stationary ceremony.

The display surface of such a flat panel display device is the display panel itself. It consists of a body surface panel, and in some cases, the outer surface of the surface panel is further covered with a transparent protective cover. Also, especially for portable devices such as mobile phones, a transparent resin covering sheet that is adhered to the surface of the surface panel or the protective cover to protect the surface of the cover from dirt and scratches has already been developed. It is commercially available.

 By the way, it was pointed out that when carrying a mobile phone or a PDA, many women carry extra hand-held mirrors, and thus carry more luggage. A similar problem has been pointed out in AV display devices used in homes, and it may happen that existing wall-mounted mirrors have to be relocated or removed to install wall-mounted AV display devices. Disclosure of the invention

 Therefore, an object of the present invention is to provide a flat panel display device that can be used as a mirror when the screen is not in a display state. In that case, when the screen is in a display state, the screen display is not displayed. The goal is to not interfere with visibility.

 A flat panel display device according to the present invention is a flat panel display device incorporating a self-luminous light source that emits display light for displaying characters, Z, or images, and reflects light from outside and displays from inside. A half mirror layer for transmitting light is provided so as to cover the display surface of the display. As a specific embodiment of the present invention, one half-mirror layer is formed on the display surface of the display or on the surface of the transparent protective power par thereof.

 Another specific embodiment of the present invention is characterized in that the half mirror layer is made of a sticking film stuck on the display surface or the transparent protective cover thereof.

 The present invention also provides an adhesive film for easily realizing the flat panel display device as described above, and the adhesive film covers the display surface of the flat panel display or the transparent protective cover surface thereof. Film

'' Reflects external light incident on the display surface and transmits display light from inside. -It is characterized by having unique characteristics.

 In the flat panel display device according to the present invention, a half mirror layer that reflects light from the outside and transmits display light from the inside is provided so as to cover the display surface of the display. For this reason, when displaying the screen of the display, the visibility of the display is not hindered by turning on the backlight, and when the screen is not displayed, the backlight can be used as a mirror that reflects external light by turning off the backlight. .

 Note that the flat panel display according to the present invention has a built-in self-luminous light source that emits display light for displaying characters and / or images. For example, light-emitting display elements as well as light-receiving display elements include those in which a display screen on which characters, Z, or images are displayed is emitted by a self-luminous light source from inside the device. For example, not only mobile phones or PHS terminals, but also liquid crystal displays and organic EL panels integrated with portable information devices such as PDAs and notebook personal computers, and display devices for desktop personal computers It includes a liquid crystal display device, a liquid crystal display as an AV display device, a plasma display, and the like.

 That is, in many cases, the flat panel display device has a feature that the flatness of the panel is good and the distortion is small. For example, the display surface of a liquid crystal device appears on a glass or resin display plate of the liquid crystal device itself, and in some cases, a transparent protective cover made of glass or resin for protecting the display plate is further covered in the present invention. On the display surface with high flatness and little distortion, a half-mirror layer that reflects light from the outside and transmits display light from the inside is provided over the display surface. When displaying a screen, the screen display can be seen over a half-mirror by turning on the backlight or emitting light from the light-emitting element. When not displaying the screen of the display, the backlight or the light-emitting element can be used to turn off the display. Since the screen becomes darker, it can be used as a mirror that reflects external light.

The half-mirror layer may be formed directly on the display surface of various display devices or its transparent protective cover, Either the surface or an adhesive film that is attached to cover the transparent protective cover thereof is a preferred embodiment.

 The flat panel display device of the present invention can be used, for example, when assembling a portable information terminal, a notebook personal computer, a liquid crystal display device, or an AV display device, the surface plate of various display devices or its transparent protective cover. By using parts that have been subjected to half-mirror coating, they can be manufactured without changing the conventional assembly line.

 Further, when the protective cover is damaged during use or the like, it can be realized by replacing the transparent protective cover with a half mirror coat when attaching a new protective cover.

 In another aspect of the present invention, there is provided a film adhered to cover a display surface of a display or a surface of a transparent protective cover thereof, wherein the film reflects external light incident on the display surface of the display and reflects display light from the inside. Provide an adhesive film with a half-mirror characteristic that allows transmission.

 When the display film is displayed on the display by lighting the pack light or emitting light from the light emitting element, the adhesive film transmits the display light from the inside, so that the visibility is not hindered. When the screen is not displayed by turning off the light, it can be used as a mirror due to the external light reflection characteristics.

 That is, like the protective film for protecting the display surface of the existing display, the adhesive film provided with a half-mirror layer according to the present invention can not only protect the display from dust, dirt, and scratches, but also protect the display screen. When displaying, the backlight is illuminated and the light-emitting element emits light, so that the screen display is transmitted through the half-mirror, so that the visibility is not impaired. On the other hand, when the display screen is not displayed, the backlight is used. Since the screen of the display is darkened by turning off the light and the light emitting element, the light from the outside is reflected by the half mirror and can be used as a mirror.

The sticking film according to the present invention may be stuck so as to cover, for example, the entire surface or a region excluding a part of each display surface. More preferably, a film having a shape conforming to the outer shape of each display surface is attached. The material of the film may be made of glass or resin as long as it has half-mirror characteristics. To obtain half-mirror characteristics, a half-mirror coat may be applied.

 As described above, the present invention has an effect that the visibility of the display is not hindered when displaying the screen of the display, and the mirror can be used as a mirror when the screen is not displayed. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is an explanatory diagram showing a configuration of a mobile phone according to one embodiment of the present invention.

 FIG. 2 is an explanatory diagram showing a cross-sectional configuration of the liquid crystal display of FIG.

 FIG. 3 is an explanatory diagram showing a configuration of a mobile phone according to another embodiment of the present invention.

 FIG. 4 is an explanatory diagram showing a cross-sectional configuration of the liquid crystal display of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

 FIG. 1 is an explanatory diagram showing a configuration of a mobile phone according to one embodiment of the present invention. As shown in the figure, a liquid crystal display 14 is arranged on a folding surface of an upper structure 12 of a mobile phone main body 11 composed of an upper structure 12 and a lower structure 13. The display surface of the liquid crystal display 14 is covered with a protective cover 15 made of glass.

 A half-mirror coat is applied to the entire surface of the protective cover 15, and when the backlight of the liquid crystal display 14 is lit, the screen display can be visually recognized through the half-mirror. When the power is turned off or the computer enters sleep mode, the backlight turns off, so that light from outside can be reflected well and used as a hand mirror. In addition, for example, if the standby screen is set as a completely dark screen by setting the mobile phone so that the light of the backlight does not go outside, it is assumed that the backlight is turned off here. .

FIG. 2 shows a cross-sectional configuration of the liquid crystal display of FIG. As shown in the figure, a pair of electrodes 21 is provided on each of the opposing surfaces of the pair of glass substrates 20, and a pair of light distribution films 22 are provided on each of the opposing surfaces of each electrode 21. ing. A liquid crystal 24 is disposed at an end between a pair of light distribution films 22 separated by a predetermined gap by the spacer 23. Sealed with sealant 25.

 A polarizing plate 26 is provided on each of the mutually separated surfaces of the pair of glass substrates 20. Outside the polarizing plate 26 of the one glass substrate 20, a cathode tube 27 and a light guide plate 28 for guiding light from the cathode tube 27 are covered with a reflection plate 29. Further, a color filter 19 is mounted between the other glass plate 20 and the electrode 21. The above is what is called a “liquid crystal device”.

 As shown in FIG. 2, on the exposed surface of the other polarizing plate 26 of the liquid crystal device 20, a protective glass 18 made of transparent glass is arranged so as to cover the display screen of the liquid crystal device. A half mirror layer 30 is formed on the side of the polarizing plate 26 of the protective cover 18.

 FIG. 3 is an explanatory diagram showing the configuration of another embodiment of the present invention. As shown in the figure, a liquid crystal display 34 is arranged on the folding surface of the upper structure 32 of the mobile phone main body 31 composed of the upper structure 32 and the lower structure 33. The display surface of the liquid crystal display 34 is covered with a protective cover 35 made of glass.

 An adhesive film 36 formed by providing a half-mirror layer on a resin film is attached to the surface of the protective power member 35 so as to cover the display surface of the liquid crystal display 34. Since this adhesive film 36 is provided with a half-mirror layer, when the backlight of the liquid crystal display 34 is lit, the screen display can be viewed through the half mirror. When the power is turned off or the computer enters sleep mode, the backlight turns off, so that light from outside can be reflected well and used as a hand mirror. The same applies to the case of a truly dark standby screen.

 FIG. 4 shows a cross-sectional configuration of the liquid crystal display of FIG. As shown in the figure, similarly to FIG. 2, a pair of electrodes 41 is provided on each of the opposing surfaces of the pair of glass substrates 40, and a pair of light distribution is provided on each of the opposing surfaces of each electrode 41. A membrane 42 is provided. A liquid crystal 44 is sealed between a pair of light distribution films 42 separated by a predetermined gap in the spacer 43 with a sealant 45 disposed at an end.

A polarizing plate 46 is provided on each of the mutually separated surfaces of the pair of glass substrates 40. Outside the polarizing plate 46 of the glass substrate 40, a cathode tube 47 and a light guide plate 48 for guiding the light of the cathode tube 47 are covered with a reflection plate 49. Also, the other glass plate 40 and the electrode A color filter 39 is provided between the color filter 41 and the color filter 41. The above is what is called a “liquid crystal device J”.

 A protective cover 38 made of transparent glass is disposed on the exposed surface of the other polarizing plate 46 of the liquid crystal device 40 so as to cover the display screen of the liquid crystal device. As shown in FIG. 4, a resin adhesive film 51 is attached to the exposed side of the protective cover 38, and a half mirror layer 50 is attached to the polarizing plate side of the adhesive film 51. Are formed.

Claims

The scope of the claims 1 A flat panel display device incorporating a self-luminous light source that emits display light for displaying characters and / or images,  A flat panel device, wherein a half mirror layer that reflects light from the outside and transmits display light from the inside is provided so as to cover the display surface of the display. 2. The flat panel display device according to claim 1, wherein the eight-first mirror layer is formed on a display surface of a display or a surface of a transparent protective cover thereof. 3. The flat mirror according to claim 1, wherein the half mirror layer is made of a sticking film stuck on the display surface or a transparent protective cover thereof. 4 A film that is adhered over the display surface of a flat panel display or the surface of its transparent protective cover,  An adhesive film having a half mirror characteristic of reflecting external light incident on a display surface of a display and transmitting display light from the inside.