Display device

Abstract

The utility model relates to the technical field of display, in particular to a display device. The display device comprises a light-emitting module. The light-emitting module comprises a light-emitting element and a phosphorescent unit which are arranged correspondingly; the phosphorescent unit is arranged in the light-emitting element, or the phosphorescent unit is arranged on the light-emitting surface of the light-emitting element; the light-emitting color of the light-emitting element is the same as the light-emitting color of the phosphorescent unit. The display device simply and efficiently realizes the integrity of the shot content.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device. Background Art

[0002] When a camera is used to capture a display image of a display device, a phenomenon of missing captured information may occur.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and to provide a display device that simply and efficiently achieves the integrity of the captured content.

[0005] According to one aspect of the present disclosure, there is provided a display device comprising a light emitting module;

[0006] The light emitting module includes a light emitting element and a phosphorescent unit which are arranged corresponding to each other;

[0007] The phosphorescent unit is arranged inside the light-emitting element, or the phosphorescent unit is arranged on the light-emitting surface of the light-emitting element;

[0008] The light emitting color of the light emitting element is the same as the light emitting color of the phosphorescent unit.

[0009] In one embodiment of the present disclosure, the number of the light-emitting modules is multiple;

[0010] At least two of the light-emitting modules have different colors.

[0011] In one embodiment of the present disclosure, there are multiple light-emitting modules, and the multiple light-emitting modules have the same color;

[0012] The phosphorescent units are arranged on the light-emitting surface of the light-emitting element; and the phosphorescent units are interconnected to form a phosphorescent film.

[0013] In one embodiment of the present disclosure, the phosphor film includes two transparent substrates, and includes a phosphor layer and a transparent encapsulation layer located between the two transparent substrates;

[0014] The transparent encapsulation layer surrounds the phosphor layer and connects the two transparent substrates.

[0015] In one embodiment of the present disclosure, the phosphor layer comprises a polymer resin and phosphor powder, and a mass ratio of the polymer resin to the phosphor powder is 100:25 to 100:40.

[0016] In one embodiment of the present disclosure, the mass ratio of the polymer resin to the phosphor powder is 100:33.

[0017] In one embodiment of the present disclosure, the afterglow time of the phosphor is greater than the refresh time of the display device.

[0018] In one embodiment of the present disclosure, the width of the transparent encapsulation layer is not less than 0.5 mm.

[0019] In one embodiment of the present disclosure, the phosphor powder is potassium fluorosilicate.

[0020] In one embodiment of the present disclosure, the display device is a segment code screen.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 Schematic diagram of the display interface of a display device during refresh intervals in the related art.

[0024] Figure 2 Schematic diagram of the structure of a display device in one embodiment of the present disclosure.

[0025] Figure 3 This is a schematic diagram of a display interface of a display device during refresh intervals in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0027] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0028] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second", etc. are used only as labels and are not intended to limit the quantity of their objects.

[0029] Glossary:

[0030] 1. Phosphorescence: This effect differs from typical luminescence in that it can continue to emit light without external radiation. Phosphorescent materials typically emit light longer than ordinary luminescent materials, lasting for hours or even longer.

[0031] 2. Afterglow time: Afterglow time is the time that the luminescence continues after the excitation stops.

[0032] See also Figure 1 When a shooting device is used to shoot a display screen of a display device, shooting information may be missing.

[0033] After analysis, the inventors discovered that this is because the display device has a stroboscopic characteristic, briefly lighting up during refreshes and dimming between refreshes. The camera's exposure time is short, so when the camera is used to capture the image, the display device will be dimmed, resulting in missing captured information.

[0034] In order to confirm this discovery, the inventors conducted verification using a segment code screen as an example.

[0035] Segment code displays are used in applications such as date displays, elevator buttons, and stock trading floor displays. They can display simple content with low power consumption and are generally used to display numbers, letters, and special symbols. Segment code displays often use LED digital tubes, which are characterized by their low cost, stability, and simplicity. Digital tubes generally come in two types: seven-segment and eight-segment. Eight-segment tubes have an additional decimal point compared to seven-segment tubes, and each segment is a separate LED light. Digital tubes are categorized as either common cathode or common anode. For example, a common cathode tube has 10 pins. Pins 3 and 8 can serve as the common cathode, while the remaining anodes individually drive the LEDs in each segment.

[0036] Segment code screens are composed of multiple digital tubes. When in display mode, each segment of the digital tube flashes. This is based on the human visual persistence effect, which allows the human eye to see all segments of the multiple digital tubes illuminated simultaneously. The digital tubes must have a flashing frequency greater than 50Hz, meaning a scanning frequency greater than 50Hz, to avoid a perceived flicker. A typical digital tube scan frequency is set to 100Hz, resulting in a switching cycle of 1 / 100 = 10ms. The fluorescent powder encapsulated within the digital tube LED lamp has an afterglow effect of nanoseconds after being excited. Therefore, after the power-on signal is applied, the fluorescent powder is briefly illuminated and then dims between signal refreshes.

[0037] After testing, laboratory testing equipment often uses an optoelectronic camera (e.g., a mobile phone) to record and compare before-and-after data. All optoelectronic cameras use an interlaced scanning method to capture image points. When scanning a point, the CMOS (Complementary Metal-Oxide-Semiconductor) sensor design directly connects an ADC (Analog-to-Digital Converter) to each pixel to amplify and convert the signal into a digital signal for output. For example, in the odd field, the video signal for the next field arrives after the last odd-numbered line is scanned. When using a mobile phone to record test data, if the rear camera has a pixel count of 4000 x 3000 and a line pulse count of 4000, the camera's single-line exposure time (1 / 60 / 4000) = 4.17 μs, which is less than the 10 ms refresh time of the digital tube. This can cause discrepancies between the captured image and the actual device image, with some information missing.

[0038] In order to solve the above problem, the inventor provides a display device after multiple experiments and verifications, which can avoid the phenomenon that the captured content is inconsistent with the actual device content.

[0039] In a first embodiment of the present disclosure, the display device includes a light-emitting module comprising a corresponding light-emitting element and a phosphorescent unit, with the phosphorescent unit disposed within the light-emitting element. When light is emitted and impinges upon the phosphorescent unit, the phosphorescent unit is excited. Thus, the phosphorescent unit, stimulated by the emitted light, continues to emit light between refreshes of the display device, thereby enabling an optoelectronic camera (e.g., a mobile phone) to capture the complete display information.

[0040] In one embodiment of the present disclosure, the phosphorescent unit is disposed inside the light-emitting element. In one example, the phosphorescent unit constitutes a part of the light-emitting element. In other words, the phosphorescent unit participates in the light emission of the light-emitting element.

[0041] In one embodiment of the present disclosure, the phosphorescent unit contains phosphor powder, and the phosphorescent effect of the phosphor powder is utilized to enable the phosphorescent unit to keep emitting light during the refresh interval of the display device. In one example, the phosphorescent unit is phosphor powder.

[0042] In one embodiment of the present disclosure, the display device may be a segmented screen. The segmented screen has a digital tube, and the phosphorescent unit (phosphor powder) can be directly encapsulated in the LED light of the digital tube. In this way, the digital tube can continue to emit light during the refresh intervals of the segmented screen, thereby solving the problem of missing shooting information in existing display devices and achieving the effect of shooting and recording complete information at any time.

[0043] The structure provided by the embodiments of the present disclosure can be applied to the development of new display devices and can directly improve the problem of incomplete shooting information from the source.

[0044] In a second embodiment of the present disclosure, the present disclosure provides a display device, see Figure 3 and Figure 2 The display device includes a light-emitting module; the light-emitting module includes a light-emitting element LD and a phosphorescent unit LEM corresponding to each other; the phosphorescent unit LEM is disposed on the light-emitting surface of the light-emitting element LD; and the light-emitting color of the light-emitting element LD is the same as the light-emitting color of the phosphorescent unit LEM. In the present disclosure, after the light emitted by the light-emitting element LD is incident on the phosphorescent unit LEM, the phosphorescent unit LEM is excited. In this way, the phosphorescent unit LEM is excited by the light emitted by the light-emitting element LD and can continue to emit light during the refresh interval of the display device, so that an optoelectronic camera device (such as a mobile phone) can fully capture the displayed information.

[0045] In one embodiment of the present disclosure, the luminous color of the light-emitting element LD is the same as the luminous color of the phosphor unit LEM, which means that the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM is not greater than 1.5NBS. In other words, when the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM is not greater than 1.5NBS, it can be considered that the luminous color of the light-emitting element LD is the same as the luminous color of the phosphor unit LEM. For example, the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM may be 1.5NBS. For another example, the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM may be 1.3NBS. For another example, the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM may be 1NBS. For another example, the color difference between the luminous color of the light-emitting element LD and the luminous color of the phosphor unit LEM may be 0.8NBS. For another example, the color difference between the light emitting color of the light emitting element LD and the light emitting color of the phosphor unit LEM can be 0.5NBS. In other examples, other parameters can also be used.

[0046] In one embodiment of the present disclosure, the display device can be a multi-color display device. In other words, the number of light-emitting modules can be multiple; at least two of the light-emitting modules have different colors. For example, one of the light-emitting modules can emit red light (it can be understood that the light-emitting element LD emits red light and the phosphorescent unit LEM emits red light), and one of the light-emitting modules can emit green light (it can be understood that the light-emitting element LD emits green light and the phosphorescent unit LEM emits green light). For another example, one of the light-emitting modules can emit red light (it can be understood that the light-emitting element LD emits red light and the phosphorescent unit LEM emits red light), and one of the light-emitting modules can emit blue light (it can be understood that the light-emitting element LD emits blue light and the phosphorescent unit LEM emits blue light). For another example, one of the light-emitting modules can emit red light (it can be understood that the light-emitting element LD emits red light and the phosphorescent unit LEM emits red light), one of the light-emitting modules can emit blue light (it can be understood that the light-emitting element LD emits blue light and the phosphorescent unit LEM emits blue light), and one of the light-emitting modules can emit green light (it can be understood that the light-emitting element LD emits green light and the phosphorescent unit LEM emits green light). In other examples, other colors are also possible.

[0047] In another embodiment of the present disclosure, the display device can be a monochrome display device. In other words, there are multiple light-emitting modules, and the multiple light-emitting modules have the same color. For example, all light-emitting modules can emit red light. For another example, all light-emitting modules can emit green light.

[0048] In this example, the phosphorescent unit LEM is arranged on the light emitting surface of the light emitting element LD, and each phosphorescent unit LEM can be connected to form a phosphorescent film LEF. In this way, multiple phosphorescent units LEM form a whole and can be manufactured simultaneously, reducing the difficulty of the manufacturing process.

[0049] In one embodiment of the present disclosure, the phosphor film LEF may include a phosphor layer PT, a transparent encapsulation layer TEL and two transparent substrates. It is understandable that the two transparent substrates may be a first transparent substrate BP1 and a second transparent substrate BP2. The phosphor layer PT and the transparent encapsulation layer TEL are located between the first transparent substrate BP1 and the second transparent substrate BP2, and the transparent encapsulation layer TEL surrounds the phosphor layer PT and connects the first transparent substrate BP1 and the second transparent substrate BP2. In other words, the phosphor film LEF includes a first transparent substrate BP1, a phosphor layer PT, a second transparent substrate BP2 stacked in sequence, and a transparent encapsulation layer TEL located between the first transparent substrate BP1 and the second transparent substrate BP2 and surrounding the phosphor layer PT.

[0050] In one embodiment of the present disclosure, the first transparent substrate BP1 may be a glass substrate, and the second transparent substrate BP2 may be a glass substrate. In another example, the first transparent substrate BP1 may be a plastic substrate, and the second transparent substrate BP2 may be a plastic substrate. This can reduce the cost of the display device. For example, the first transparent substrate BP1 and the second transparent substrate BP2 may be made of thermoplastic plastic, such as PET substrates.

[0051] In one embodiment of the present disclosure, a phosphor layer PT contains phosphor powder PP. This phosphor powder PP exhibits a phosphorescent effect, and its afterglow time is greater than the refresh time of the display device. Afterglow time refers to the time from the onset of luminescence of the phosphor layer PT until the brightness decays to 10% of its maximum brightness. Thus, the phosphor powder PP, stimulated by light emitted by the display device, continues to glow between refreshes, allowing an optoelectronic camera (e.g., a mobile phone) to capture the entire displayed information.

[0052] In one embodiment of the present disclosure, the material of the phosphor layer PT includes a polymer resin PR and phosphor powder PP. In one example, the phosphor layer PT is composed of the polymer resin PR and the phosphor powder PP. In other words, the phosphor powder PP is distributed in the polymer resin PR.

[0053] In one embodiment of the present disclosure, the mass ratio of polymer resin PR to phosphor powder PP is between 100:25 and 100:40. This ensures both high light transmittance and high color rendering properties and good luminous intensity for the phosphor layer PT. For example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:25. For another example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:28. For another example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:30. For another example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:33. For another example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:36. For another example, the mass ratio of polymer resin PR to phosphor powder PP can be 100:40. This range achieves an optimal balance between color rendering properties and light transmittance for the phosphor layer PT.

[0054] In one embodiment of the present disclosure, the greater the thickness of the phosphor layer PT, the greater the light output intensity. In this example, the thickness of the phosphor layer PT can be 5 μm to 15 μm. For example, the thickness of the phosphor layer PT can be 5 μm; for another example, the thickness of the phosphor layer PT can be 8 μm; for another example, the thickness of the phosphor layer PT can be 10 μm; for another example, the thickness of the phosphor layer PT can be 11 μm; for another example, the thickness of the phosphor layer PT can be 13 μm; for another example, the thickness of the phosphor layer PT can be 15 μm.

[0055] In the present disclosure, by providing a transparent encapsulation layer TEL between the first transparent substrate BP1 and the second transparent substrate BP2, firstly, the first transparent substrate BP1 and the second transparent substrate BP2 are bonded together; secondly, water and oxygen barriers can be implemented for the phosphor layer PT, thereby improving the service life of the display device. In one embodiment of the present disclosure, the width of the transparent encapsulation layer TEL is not less than 0.5 mm, where the width refers to the size of the transparent encapsulation layer TEL along the extension direction of the phosphor layer PT toward the transparent encapsulation layer TEL. For example, the width of the transparent encapsulation layer TEL can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 5 mm, and so on. In this example, the width of the transparent encapsulation layer TEL is 2 mm, which ensures a high water and oxygen barrier effect without taking up too much space.

[0056] In one embodiment of the present disclosure, the transparent encapsulation layer TEL may be an adhesive layer to achieve stable bonding between the first transparent substrate BP1 and the second transparent substrate BP2. In other embodiments, the transparent encapsulation layer TEL may also be made of other materials that can achieve stable bonding.

[0057] In one embodiment of the present disclosure, the display device is a monochrome display device. Taking the display device emitting red light as an example, the color of the phosphor powder PP in the phosphor layer PT in the phosphor film LEF is red, for example, KSF powder (potassium fluorosilicate), (KSF powder is a fluoride red phosphor powder PP, and its afterglow time is about 17ms). In this example, the phosphor film LEF can be prepared by the following method: after the KSF powder is fully mixed in the polymer resin PR (the mass ratio of the KSF powder is 100:33), a mixture of the phosphor powder PP and the polymer resin PR is obtained, the mixture of the phosphor powder PP and the polymer resin PR is evenly coated on the first transparent substrate BP1 (PET substrate), and then an adhesive is evenly coated on the first transparent substrate BP1, and a second transparent substrate BP2 (PET substrate) is used as an encapsulation layer for edge sealing. The width of the encapsulation edge (adhesive) is 2mm, and water and oxygen are blocked to improve the service life. Thus, a phosphor material plastic sheet is made, and the phosphor material plastic sheet is the phosphor film LEF.

[0058] In the embodiment of the present disclosure, the phosphor film LEF is attached to the display surface of the display device, and the mobile phone can save complete data information when taking pictures.

[0059] In one example, the display device is a segment code screen, and the segment code screen emits red light as an example. Specifically, the phosphor film LEF with KSF powder prepared above is set on the display side of the segment code screen, and the red afterglow time of KSF powder is 17ms> the refresh time of the segment code screen is 10ms. After the phosphor film LEF with KSF powder is excited by the digital tube in the segment code screen, it will continue to produce afterglow in the refresh interval of the segment code screen. In this way, the display device will continue to emit light in the refresh interval of the segment code screen, so that the mobile phone can capture the display information completely and retain all the display information. It solves the problem of missing shooting information when the shooting equipment shoots the monochrome stroboscopic display device, and realizes the simple and efficient shooting and saving of the display device content anytime and anywhere.

[0060] In other examples, the display device may also be a stroboscopic LED display device or other display device structures.

[0061] In the present disclosure, by setting up a display device, the existing stroboscopic display device can be optimized, which is low-cost and reusable. By quickly preparing the display device, the problem of missing shooting information of the existing display device can be quickly and efficiently solved, and the effect of shooting and recording complete information at any time can be achieved.

[0062] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A display device, characterized in that: Including light-emitting module; The light emitting module includes a light emitting element and a phosphorescent unit which are arranged corresponding to each other; The phosphorescent unit is arranged inside the light-emitting element, or the phosphorescent unit is arranged on the light-emitting surface of the light-emitting element; The light emitting color of the light emitting element is the same as the light emitting color of the phosphorescent unit.

2. The display device according to claim 1, wherein There are multiple light-emitting modules; At least two of the light-emitting modules have different colors.

3. The display device according to claim 1, wherein There are multiple light-emitting modules, and the multiple light-emitting modules have the same color; The phosphorescent units are arranged on the light-emitting surface of the light-emitting element; and the phosphorescent units are interconnected to form a phosphorescent film.

4. The display device according to claim 3, wherein: The phosphor film includes two transparent substrates, and includes a phosphor layer and a transparent encapsulation layer located between the two transparent substrates; The transparent encapsulation layer surrounds the phosphor layer and connects the two transparent substrates.

5. The display device according to claim 4, wherein: The phosphor layer comprises a polymer resin and phosphor powder, and the mass ratio of the polymer resin to the phosphor powder is 100:25 to 100:

40.

6. The display device according to claim 5, wherein: The mass ratio of the polymer resin to the phosphor powder is 100:

33.

7. The display device according to claim 5, wherein: The afterglow time of the phosphor powder is greater than the refresh time of the display device.

8. The display device according to claim 4, wherein: The width of the transparent encapsulation layer is not less than 0.5 mm.

9. The display device according to claim 5, wherein: The phosphor powder is potassium fluorosilicate.

10. The display device according to any one of claims 1 to 9, characterized in that: The display device is a segment code screen.

Images