TW567353B - Contrast-adjustable panels and displays via light-emitting devices - Google Patents

Abstract

Contrast-adjustable displays via light-emitting devices include transparent substrates, light-detectable units, current-detectable units, organic light-emitting units, driving units and controlling units. The light-detectable unit for detecting the intensity of external light is formed on the transparent substrate, and then generates a proper intensity of current based on the intensity of external light. The current-detectable unit for detecting the intensity of current is electrically connected with the light-detectable unit. The organic light-emitting unit is formed on the transparent substrate for generating light. The driving unit drives the light-detectable unit and the organic light-emitting unit, respectively, and is electrically connected with the light-detectable unit and the organic light-emitting unit, respectively. The controlling unit is electrically connected with the current-detectable unit, and then controls the driving unit depending on the intensity of current that detected by the current-detectable unit. The invention also discloses a contrast-adjustable display via light-emitting device including the transparent substrate, the light-detectable unit, the first driving unit, the current-detectable unit, the organic light-emitting unit, the second driving unit and the controlling unit. The first driving unit and the second driving unit drive the light-detectable unit and the organic light-emitting unit, respectively. The controlling unit is electrically connected with the current-detectable unit, and then controls the second driving unit depending on the intensity of current that detected by the current-detectable unit. The invention also discloses a contrast-adjustable panel via light-emitting device including the transparent substrate, the light-detectable unit, the organic light-emitting unit. The light-detectable unit for detecting the intensity of external light is formed on the transparent substrate, and then generates the proper intensity of current relying on intensity of external light. The organic light-emitting unit that can generate light is formed on the transparent substrate.

Description

567353, description of the invention (U [Field of the Invention] and display month = automatic contrast adjustment of the light-emitting diode panel is set in one of the inorganic light detector and organic light-emitting diode. Automatic contrast adjustment of soil Light-emitting diode panel and display [Know-how] Source-oriented light: pieces are facing high brightness, flatness, thinness, and energy-saving self-luminous, wide, # In view of this, organic light-emitting diodes (0LED) With its wide range and 'high response range 2, low cost, and operating temperature research and development direction-becoming the self-luminous property of the organic light-emitting diode display in the optoelectronic industry at present == when the external source strength is strong, The ratio will be higher than that of a general reflective display. When the intensity of the external light source A is greater than the brightness of the display, I can easily identify the text or pattern on the display with ^^. Conversely, # 外 ς _, Users are prone to thorns and sensations during operation, and how to automatically adjust the party level of the display as the intensity of the external light source changes is one of the most important topics of organic light-emitting diode displays at present. Regarding the subject of the display automatically adjusting the contrast, in the conventional technology, an existing liquid crystal display uses an external liquid crystal detector to measure an external light source, and uses a feedback signal to control a driving voltage of a display pixel, thereby achieving ^ of the display brightness Purpose, such as US patent US 5,153,756. However, page 9 567353 V. Description of the invention (2) I. There is currently no technology for automatically adjusting contrast applied to organic light-emitting diode displays. The low and the contrast is the diode detection unit. The light source unit is the light unit, which is a dynamic light detection and detection single drive single diode drive single action unit board. The inorganic degree automatically reaches the above-mentioned display element, a light detection intensity, and the electrical connection system forms an electrical connection measuring unit element, H element. Then, the display, the light detector of the present invention and the purpose of adjusting the light emission, the present invention includes a transparent organic The light emitting single test unit is shaped and is based on the light source on the light detection unit on the transparent substrate on the light detection unit and the organic light emission according to the current The present invention includes a transparent element, a current detection unit, and a control unit. The purpose of measuring external light is to provide a volume organic light-emitting diode, a polar panel, and a bright substrate, a yuan, and a driving display. Contrast self-detecting single unit and formed on a transparent substrate, using the strength of the current intensity to generate a unit to detect the 'used to produce yuan and organic hair unit; the control measurement unit also provides a bright substrate, one yuan, one Organically, the intensity of the light detection source is driven by a driving unit that drives the light detection to detect and detect the light; the second unit is connected to the light detection unit to measure the current to generate a light source light unit, and the unit is the current contrast of the electrical measurement from the light detection. The measuring unit of the single light emitting unit is based on the measuring unit of the light source; the current intensity is thin and light, and the light emitting element is adjusted on the same substrate; a current and a control unit are used to detect the outside world and the current detection degree; the organic hair driving unit is used to separately drive the connection The first and second luminescent elements are driven and adjusted according to the current intensity to generate a Detecting a single stream; organic light emitting

Page 567 353

Single: Department: formed on a transparent substrate 'for generating a light source; the first-system light emitting unit; the control unit is electrically connected to the current detection unit 70 and controls the first according to the current intensity detected by the current detection unit 70. -Drive unit. In addition, the present invention also provides a kind of automatic contrast. Compared with the conventional technology, the present invention provides an automatic contrast adjustment light-emitting diode panel and display, which can automatically adjust its own light-emitting intensity as the intensity of the external light source changes. Achieve proper contrast, so that users can reduce the trouble in operation. In the present invention, the organic light emitting diode and the inorganic light detecting unit are arranged on the same transparent substrate, which can not only reduce the manufacturing cost ', but also reduce the volume of the entire device, so as to meet the requirements of lightness, thinness and shortness of electronic products. A pole and a panel include a transparent substrate, a light detection unit and an organic light emitting unit. The light detection unit is formed on the transparent substrate to detect the intensity of the light source from the outside, and generates a current intensity according to the intensity of the light source. The organic light emitting unit is formed on the transparent substrate to generate a light source.

[Detailed description of the preferred embodiment]

Hereinafter, a light-emitting diode panel and a display with automatic contrast adjustment according to an embodiment of the present invention will be described with reference to related drawings. The same elements will be indicated by the same reference symbols. For any display, the brightness ratio between full light and full dark is one of the important factors that determines its recognition. This ratio is called contrast, and its definition is shown in the following equation ...

Page 11 567353, invention description (4)

Among them, the smaller the internal reflection of Lsub, off is from the upper degree, the lower the contrast, if the energy; the opposite brightness, the light-emitting diode adjustment panel is aligned to the array, and the light emission of the following device is' Lsub, on is a pixel. The brightness when it is lit is the brightness that is not lit, and the Ramb is the brightness that external light enters the display. It can be known from the above equation that when the intensity of the external light source is stronger, the contrast is worse, and when the intensity of the external light source is weak, it increases sharply. Therefore, when the contrast is reduced to affect the discrimination and the brightness of the display is appropriately increased, a proper contrast can be maintained. When the contrast is too large, if the display can be properly reduced, the power consumption can be reduced and the glare problem can be reduced. Ming is using this feature to provide a contrast automatic adjustment panel and display, which can follow the intensity of the external light source and the brightness of the display. + An organic f photodiode panel and a display have a light emitting unit, and in the embodiment of the present invention, a light emitting unit is used to replace the entire light emitting diode panel unit for convenience. Please refer to FIG. 1, a contrast self-adjusting light-emitting diode display 1 according to a preferred embodiment of the present invention includes a transparent substrate, a light = 疋 12, a current detection unit 13, and an organic Light-emitting unit 14, _ early time unit 15 and a control unit 16. Among them, the transparent substrate 11 may be a glass substrate, a plastic substrate, or a flexible substrate. Here, the plastic substrate and the flexible substrate may be a polycarbonate

567353 V. Description of the invention (5) (polycarbonate, PC) substrate, a polyester (PET) substrate, a cyclic olefin copolymer (COC) substrate, or a metal chrome substrate-ring Ethylene copolymer (metalcene-based cyclic olefin copolymer, mCOC) substrate. In this embodiment, since light can penetrate the transparent substrate 11, the light generated by the organic light-emitting unit 14 can be transmitted through the transparent substrate 11 to the outside; and the light detection unit 12 receives light from the outside and uses For detection. Next, as shown in FIG. 1, the light detection unit 12 is formed on the transparent substrate 11 and is used to detect the intensity of the external light source and generate a current intensity according to the obtained intensity of the light source. Here, the intensity of the obtained light source is directly proportional to the intensity of the generated current. In other words, the smaller the intensity of the outer-boundary light source detected by the light detection unit 丨 2 is, the weaker the current intensity is; and the larger the intensity of the outer-boundary light source detected by the light detection early element 12 is, the larger the intensity of the generated current is. The stronger the current intensity. The light detection unit 12 in this embodiment is an inorganic light detection unit. The inorganic light detection unit includes a transparent electrode 121, an η-shaped stone material 22, a P-type silicon material 123, and a metal electrode. Constituted by 124. As shown in FIG. 1, the n-type stone material 122 and the p-type silicon material 123 are arranged between the transparent electrode 2i and the metal electrode 1 2 4. Here, the transparent electrode 1 2 1 is a transparent cathode, and its material is a conductive metal oxide. The metal oxide may be indium tin oxide (ITO) or zinc aluminum oxide (AZO). Furthermore, the η-type silicon material 122 is formed by doping, filling,

Page 13 567353 V. Description of the invention (6) * Electron, minority carriers are holes. The p-type silicon material 123 is doped with a boron-specific divalent element in a silicon semiconductor, so that there are more positively charged holes, that is, the majority carriers are and the holes' minority carriers are free electrons. This is because the semiconductor made of pure silicon crystal does not contain other impurities, and only a few free electron holes are generated at room temperature to make it less conductive, so other small amounts of impurity elements are added to the semiconductor to achieve Increase semiconductor conductivity. The metal electrode 1 2 4 is a metal anode, which is formed on the p-type silicon material 123 by evaporation or sputtering. The material of the metal electrode 124 can be aluminum, aluminum / chain, calcium, magnesium-silver alloy, or silver. . Referring to FIG. 1, the current detection unit 1 3 is electrically connected to the light detection unit 1 2 ′. The current detection unit 1 3 detects the current intensity generated according to the light source intensity obtained by the light detection unit 丨 2. Referring again to FIG. 1, an organic light emitting unit 14 is also provided on the transparent substrate 11. The organic light emitting unit 14 is used to generate a light source, and is composed of a transparent electrode 141, an organic electroluminescent layer 142, and a metal electrode 143. The organic electroluminescent layer 142 is disposed between the transparent electrode 141 and the metal electrode 1 4 3. Here, the transparent electrode 1 41 is a transparent anode, and the material thereof may be steel tin oxide (ITO) or aluminum oxide zinc (AZ〇); the organic electro-optic excitation layer 1 42 includes a hole injection layer and a hole. The conductive layer, the light-emitting layer, and the electron conductive layer; the metal electrode 143 is a metal cathode, and is formed on the organic electroluminescent layer 142 by evaporation or sputtering, and the material can be aluminum, aluminum / lithium, Word, magnesium-silver alloy or silver. In addition, as shown in FIG. 1, the driving unit 5 is electrically connected to the optical detection

Page 14 567353 V. Description of the invention (7) The measuring unit 12 and the organic light emitting unit 14. In this embodiment, the driving unit 15 includes a first driving portion and a second driving portion. The first driving unit drives the light detection unit 12 to detect the intensity of the external light source. The second driving unit drives the organic light emitting unit 14 to generate a light source. Here, the driving unit 15 may be an active driving unit. Because the organic light 4 sensor is driven by current, it uses a switching thin film transistor (Switch TFT) as the image data to enter the storage switch, which is used for addressing, and a driving thin film transistor (Drive TFT) according to the storage capacitor The above signal voltage value modulates the continuous current that drives the light detection unit. Of course, the driving unit 15 can also be replaced by a passive driving unit. Referring to FIG. 1 again, the control unit 16 is electrically connected to the current detection unit 13 and controls the second driving unit of the driving unit 15 according to the current intensity detected by the current detection unit 丨 3. In this embodiment, the external light source detects its light source intensity through the light detection unit 12 and forms a current intensity through conversion. The driving unit 5 is controlled by the control unit 6 according to the current intensity detected by the current detection unit i 3. Next, the 'driving unit 15 drives the organic light emitting unit 14 according to the instruction of the control unit 16. "According to this principle, the organic light emitting diode display can adjust its own light emission intensity with the intensity of the external light source to achieve a proper contrast. That is to say, when the intensity of the external light source is large, the organic light emitting diode display increases Its luminous intensity; and when the intensity of the external light source is small, the organic light emitting diode display reduces its luminous intensity. FIG. 2 is an explanatory diagram of another preferred embodiment of the present invention.

Page 15 567353 V. Description of the invention (8) The 1Q drive unit 疋 15 is replaced by a first drive unit 17 and a -th: = b. In the embodiment, the -th drive unit Π system 12 'detects external light sources Intensity; the second driving unit moves the organic light emitting unit 14 to generate a light source. Here, the first dance and second drive unit 18 may be an active drive unit, and of course, it may be a passive drive unit. The following is a description of the contrast automatic adjustment light emitting diode panel of the present invention. The contrast automatic adjustment light-emitting diode panel of the present invention includes a transparent substrate 21, a light detection unit 22, and an organic light-emitting diode \ 70. The light detection unit 22 is an inorganic light detection unit. In this example, the components and the contrast automatically adjust the light-emitting diode display. The phase 5 yuan yak 'has the same features and functions. More details. When the intensity of the external light source is too strong, so that the contrast of the display is reduced to the degree of resolution, if the brightness of the display can be properly increased, the appropriate contrast can be maintained; on the contrary, when the intensity of the external light source is very weak, the contrast is sharp; By properly reducing the brightness of the display, the power consumption can be reduced and the problem of glare can be reduced. Based on this feature, the invention uses the helmet light detection unit to detect the intensity of the external light source, and automatically adjusts the brightness of the light-emitting diode panel and the display according to the intensity of the external light source & In the range. Compared with the conventional technology, the light detector and the organic light emitting diode in the present invention are disposed on the same transparent substrate, and need not be added outside the organic light emitting diode. This can reduce & The volume of the device reduces the manufacturing cost and also increases the convenience of production.

Page 16 567353 V. Description of the invention (9) The above is only exemplary, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the attached patent application.

Page 17 567353 Simple explanation [Simplified description of the drawing] Fig. 1 is a block diagram of a contrast automatic adjustment light emitting diode display according to an embodiment of the present invention. FIG. 2 is a block diagram of a contrast automatic adjustment light emitting diode display according to another preferred embodiment of the present invention. FIG. 3 is a block diagram of a contrast automatic adjustment light-emitting diode panel according to a preferred embodiment of the present invention. [Illustration of Symbols]

I Contrast auto-adjusting light-emitting diode display II Transparent substrate 12 Light detection unit 1 2 1 Transparent electrode 1 22 η-type> ε evening material 123 ρ-type silicon material 124 Metal electrode 13 Current detection unit 14 Organic light-emitting unit

141 Transparent electrode 142 Organic electroluminescent layer 143 Metal electrode 15 Drive unit 16 Control unit 17 First drive unit

Page 18 567353 Simple description of the formula 18 Second drive unit 2 Contrast ratio White-light adjustment LED panel 21 Transparent base board 22 Light detection unit 23 Organic light-emitting unit Round country Page 19

Claims (1)

567353-Ί Announcement Nong VI. Application for Patent Scope 1 · An automatic contrast-adjusting light-emitting diode display including: a transparent substrate; and a light detection unit formed on the transparent substrate to detect external light sources 'Intensity' and generate a current intensity according to the intensity of the light source; a current detection unit is electrically connected to the light detection unit to detect the current intensity; an organic light emitting unit is formed on the transparent substrate, and To generate a light source; A drive unit is electrically connected to the light detection unit and the organic light-emitting unit, respectively, to drive the light detection unit and the organic light-emitting unit, respectively; and a control unit is electrically connected to the current detection unit, And controlling the driving unit according to the intensity of the current detected by the current measuring unit. 2 · The two-body display with automatic contrast adjustment as described in item 1 of the patent application, where The driving unit includes a first driving unit and a second driving unit. The first driving unit drives the light detection unit, and the second driving unit drives the organic light emitting unit under the control of two control units. ′, And ^ 3. The automatic contrast adjusting body display as described in the first item of the patent application scope, wherein one of the transparent substrates is a glass substrate. 567353 Dynamic adjustment of light-emitting diodes 6. Scope of patent application 4 · Contrast auto display as described in item 1 of the scope of patent application, where the transparent substrate is a plastic substrate. Contrast automatic adjustment of light-emitting diodes as described in the item 5 · The first volume display as claimed in the patent application, wherein the transparent substrate is a flexible substrate. 6. The contrast automatic adjustment light-emitting diode display as described in item 1 of the scope of patent application, wherein the light detection unit is an inorganic light detection unit. 7. The contrast automatic adjustment light-emitting diode display according to item 6 of the scope of patent application, wherein the inorganic light detection unit is composed of a transparent electrode, an η-shaped stone material, a p-shaped stone material, and a metal electrode. As a result, the n-type stone material and the p-type stone material are disposed between the transparent electrode and the metal electrode. 8 · The contrast automatic adjustment light emitting diode display according to item 1 of the scope of patent application, wherein the organic light emitting unit is composed of a transparent electrode, an organic electroluminescent layer, and a metal electrode, and the organic electroluminescent light A layer is disposed between the transparent electrode and the metal electrode. ^ > 67353 ′, Shen Qing's patent scope • Contrast as described in item 7 or 8 of the Pavilion δ Qing patent scope 7th + photodiode display enclosure 7 This transparent electrode is a conductive metal oxide electrode. = · As described in item 7 of the patent scope, the first diode display is used, where ’: The metal electrode is made of aluminum. According to the comparative 7 light-emitting diode display described in item 7 or item 8 of the scope of patent application, one of the metal electrodes is a magnesium-silver alloy. 1 2 · The contrast auto-tuning display according to item 1 of the scope of patent application, wherein the driving unit is an active driving unit. 1 3 · The contrast auto-tuning display according to item 1 of the scope of patent application, wherein the driving unit is a passive driving unit. 14 · A contrast automatic adjustment of the light-emitting diode, i a transparent substrate; a light detection unit is formed on the transparent substrate, the intensity of the light source in the world ', and the current is automatically adjusted according to the intensity of the light source [Auto Adjustment [automatically adjust the whole light-emitting diode, the whole light-emitting diode, including: used to detect external intensity; Page 567 353 A first driving unit drives the light detection unit; a current detection unit is electrically connected to the light detection to measure the current intensity; j% early, for detecting an organic light emitting unit, is formed on the transparent On the substrate, a light source is used to generate a second driving unit for driving the organic light emitting diode, and a control unit is electrically connected to the current detection unit and is detected by the current detection unit. The current intensity is used to control the first-0-〆 ^ a driving unit. 15 · The contrast automatic adjustment diode display as described in item 4 of the patent application scope, wherein the light detection unit is an inorganic light detection unit. 16. The automatic contrast-adjusting light-emitting diode display as described in item 5 of the patent application scope, wherein the inorganic light detection unit is composed of a transparent electrode, an n-type stone material, a p-type silicon material, and a It is composed of a metal electrode, and the n-type silicon material and the p-type silicon material are disposed between the transparent electrode and the metal electrode. 17 · The contrast automatic adjustment light-emitting diode display according to item 4 of the scope of patent application, wherein the organic light-emitting unit is composed of a transparent electrode, an organic electroluminescent layer, and a metal electrode. The excitation light layer is disposed between the transparent electrode and the metal electrode. Page 567 353 Contains: 18 · — a type of contrast automatic adjustment light-emitting diode panel, a transparent substrate, a light detection unit, the intensity of the light source, and an organic light-emitting unit and a light source. It is formed on the transparent substrate to detect the intensity of the light source to generate a current intensity; and it is formed on the transparent substrate to generate the contrast automatic electrode as described in item 18 of the scope of patent application 19 The body panel, in particular, the light detection unit is an inorganic light detection unit. 20. The contrast automatic polarizer panel as described in item 19 of the scope of the patent application, wherein the inorganic light detection unit is composed of a transparent electrode, an η-shaped stone material, a _-shaped stone material, and a metal electrode. Composition, the n-type silicon material and the mouth-shaped stone material are disposed between the transparent electrode and the metal electrode. "21 · The automatic contrast-adjusting light-emitting diode panel described in item 18 of the scope of patent application, wherein the organic light-emitting unit is composed of a transparent electrode, an organic electro-excitation light layer, and a metal electrode. The excitation light layer is disposed between the transparent electrode and the metal electrode. Page 24